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Progresses in overcoming the limitations of in vitro erythropoiesis using human induced pluripotent stem cells


Researchers have attempted to generate transfusable oxygen carriers to mitigate RBC supply shortages. In vitro generation of RBCs using stem cells such as hematopoietic stem and progenitor cells (HSPCs), embryonic stem cells (ESCs), and induced pluripotent stem cells (iPSCs) has shown promise. Specifically, the limited supplies of HSPCs and ethical issues with ESCs make iPSCs the most promising candidate for in vitro RBC generation. However, researchers have encountered some major challenges when using iPSCs to produce transfusable RBC products, such as enucleation and RBC maturation. In addition, it has proven difficult to manufacture these products on a large scale. In this review, we provide a brief overview of erythropoiesis and examine endeavors to recapitulate erythropoiesis in vitro using various cell sources. Furthermore, we explore the current obstacles and potential solutions aimed at enabling the large-scale production of transfusable RBCs in vitro.


Since the introduction of induced pluripotent stem cells (iPSCs) in 2006 [1], various attempts have been made to utilize them in clinical applications [2] owing to their pluripotency and self-renewal capacity [3]. Alternative transfusable oxygen carriers are highly desirable for addressing scarcities in blood products. An imminent red blood cell (RBC) supply shortage is highly probable not only because of low birth rates and an aging society [4, 5], but also because of pandemic-induced low blood donation rates [6, 7].

Numerous trials have been conducted on the development of artificial blood or blood substitutes in an effort to create a diversified blood supply chain, including artificial oxygen carriers (AOCs), hemoglobin-based oxygen carriers (HBOCs), and perfluorocarbon-based oxygen carriers (PFCOCs) [8,9,10,11]. These noncellular products have critical hurdles to overcome, including biocompatibility issues and side effects such as vasoconstriction, which eventually led to failure in clinical trials [8, 12, 13]. Since the 20th century, research on generating RBCs has been published [14]. Various cell sources have been used to generate RBCs, including hematopoietic stem and progenitor cells (HSPCs) [15], embryonic stem cells (ESCs) [16], and iPSCs [17]. Recently, erythropoiesis using iPSCs has become more common due to the limited availability of HSPCs and ethical considerations for ESCs, which prevent large-scale RBC production [18]. Compared to other cell sources, iPSCs can be generated from somatic cells, are an unlimited source of cells, and can differentiate into hematopoietic lineages, making them an alternative for HSPCs [19]. Although iPSCs are a good cell source for in vitro erythropoiesis, some difficulties remain to be overcome, such as enucleation in the terminal maturation phase, immature RBCs, and challenges in large-scale manufacturing. These obstacles hinder erythropoiesis from being used to manufacture transfusable blood products. In this review, we first briefly explain the fundamental principles of erythropoiesis and focus on the in vitro erythropoiesis of iPSCs. We will then review previous attempts at in vitro RBC generation using various cell sources and the limitations of in vitro erythropoiesis. Furthermore, we discuss possible breakthroughs that may provide solutions to these limitations.

In vivo and in vitro erythropoiesis

Erythropoiesis is the process of creating mature RBCs from hematopoietic stem cells and consists of multiple steps involving erythroid progenitor cells, erythroblast precursor cells, reticulocytes, and erythrocytes [20,21,22]. There are two types of erythropoiesis: primitive and definitive erythropoiesis [23]. Primitive erythropoiesis occurs in the yolk sac and in the early stages of embryonic development, and involves the initial generation of erythroid lineage cells throughout the human lifespan [24]. Unlike primitive erythropoiesis, definitive erythropoiesis first occurs in the fetal liver, then migrates to the spleen, and finally to the bone marrow shortly before birth [23]. Primitive erythropoiesis ceases at the end of the embryonic stage, thereby generating erythroblasts that differentiate into primitive erythrocytes. Definitive erythropoiesis occurs later in the embryonic stage compared to primitive erythropoiesis, and also occurs throughout the lifespan [23].

In vivo erythropoiesis

In vivo erythropoiesis can be subdivided into multiple stages [25]. First, hematopoietic stem cells (HSCs) differentiate into multipotent progenitors (MPPs), which later differentiate into specific erythroid megakaryocyte-primed multipotent progenitors (EMkMPPs) [26, 27]. EMkMPPs then undergo a commitment phase, lose their multipotency, differentiate into burst-forming unit erythroid (BFU-E), and enter the erythroid lineage [28]. BFU-E further differentiates into colony-forming unit erythroid (CFU-E); BFU-E and CFU-E are erythroid progenitors [29].

CFU-E cells later generate erythroid precursor cells by differentiating into proerythroblasts (Pro-E), basophilic erythroblasts (Baso-E), polychromatic erythroblasts (Poly-E), and orthochromatic erythroblasts (Ortho-E) [22]. After undergoing further differentiation from Pro-E, the chromatin of the cell condenses and moves to the pole (nuclear condensation and polarization) [30, 31], which are prerequisites for enucleation. The cells also accumulate hemoglobin during these phases. In Ortho-E, the nucleus undergoes pyknosis and becomes rich in hemoglobin [21]. Ortho-E then expels its nucleus and becomes a reticulocyte. The expanded nuclei become pyrenocytes, which are later phagocytosed by macrophages [32]. Finally, the reticulocytes differentiate into terminally mature erythrocytes [33].

In vivo definitive erythropoiesis is driven by specific niches in the bone marrow called erythroblastic islands (EBIs) [34]. EBIs are composed of central macrophages and several surrounding erythroblasts [34, 35]. EBIs are crucial for the development of mature RBCs, in which central macrophages function in various ways to help erythroblasts undergo terminal maturation [35]. First, central macrophages secrete cytokines that promote erythroblast differentiation. These macrophages express insulin-like growth factor 1 (IGF1), IL-18, and vascular endothelial growth factor B (VEGF-B); IGF1 is reported to promote erythropoiesis in adjacent erythroblasts, whereas the functions of IL-18 and VEGF-B require further research [36, 37]. These macrophages also anchor to surrounding erythroblasts by expressing adhesion molecule ɑV integrin, which binds to intracellular adhesion molecule 4 (ICAM4) located on the surface of erythroblasts, thereby providing EBI integrity [36, 38]. They also supply iron to erythroblasts, which is essential for the production of heme, the main constituent of hemoglobin [39]. Since the main function of macrophages in vivo is to phagocytize debris, they also remove byproducts released by erythroblasts during erythroid maturation [40]. Pyrenocytes (which are extruded nuclei from Ortho-E), organelles disposed of by reticulocytes, and RBCs whose lifespan has been reached, are all phagocytized by these macrophages [41]. In addition, heme is recycled from aged RBCs by macrophages and returned to new hemoglobin-synthesizing erythroblasts [42].

Previous attempts of in vitro erythropoiesis

There have been many attempts to generate erythropoiesis in vitro to produce artificial blood products, since the prospects of other blood substitutes such as HBOCs and PFCOCs have not been promising. In the following section, we will summarize some important milestones in in vitro erythropoiesis, in chronological order.

The first attempt at in vitro erythropoiesis was attempted by the Douay group in 2002 and used CD34+ HSPCs from bone marrow, cord blood, and peripheral blood. They generated a pure erythroid precursor population which was amplified 200,000-fold from CD34+ hematopoietic stem cells obtained from human cord blood; when these erythroid populations were transfused into NOD/SCID mice, they achieved a low enucleation rate of 4% in vivo [15]. The Douay group next developed a three-step protocol using coculture with either murine MS-5 stromal cells or human mesenchymal cells, which also led to a 200,000-fold amplification of CD34+ HSCs, with an enucleation rate of up to 91% [43]. Miharada et al. built on the Douay group’s achievement of generating enucleated RBCs in the presence of feeder cells, and reported a four-step protocol for producing enucleated RBCs using CD34+ HSCs from cord blood without feeder cells, in media containing stem cell factor (SCF), erythropoietin (EPO), interleukin-3 (IL-3), vascular endothelial growth factor (VEGF), and insulin-like growth factor-II (IGF-II). They achieved a near 80% enucleation rate [44]. Fujimi et al. generated RBCs with an enucleation rate of 99.4% from cord blood CD34+ HSCs via a four-step protocol, using medium with SCF, Flt-3/Flk-2 ligand, thrombopoietin (TPO), and EPO. They co-cultured erythroblasts with CD34+ HSC-differentiated macrophages from a different donor, successfully resembling EBI in ex vivo conditions [45]. Timmins et al. proposed protocols for manufacturing ultrahigh-yield RBCs from cord blood CD34+ HSCs using agitating bioreactors [46]. They were able to produce over 500 units of RBCs from a single umbilical cord blood donation, with over 108-fold expansion using a fully defined culture medium, ultimately achieving an enucleation rate of over 90%. Around the same time, Douay et al. transfused cultured RBCs (cRBCs) into humans, which were differentiated from peripheral blood CD34+ HSCs with improved RBC characteristics, including deformability, enzyme content, capacity of their hemoglobin as an oxygen carrier, and expression of blood group antigens [47]. The transfused RBCs had a half-life comparable to that of native RBCs (28 ± 2 days). The methods used in these two studies hold promise for overcoming critical obstacles such as the low enucleation rate and immaturity of cRBCs, and facilitate the transition to utilizing ex vivo-generated RBCs in human clinical transfusions [46, 47].

Attempts have been made to generate RBCs in vitro using PSCs. Early in the 21st century, Kaufman et al. reported that ESCs have potential as an alternative source of HSCs, as ESCs cocultured with murine bone marrow S17 cells or yolk sac endothelial C166 cells differentiated into CD34-expressing HSPCs [48]. A similar study was conducted by Vodyanik et al., in which ESCs differentiated into high-purity CD34+ HSCs when cocultured with murine bone marrow OP9 cells, and these CD34+ cells were able to differentiate into erythroid, lymphoid, and myeloid lineage cells [49]. Olivier et al. modified Douay et al.’s protocols, which were originally created to generate enucleated RBCs from cord blood or peripheral blood CD34+ HSCs [15, 43], to enable large-scale RBC production from human ESCs (hESCs) [16]. They developed a five-step protocol to generate ex vivo cRBCs, and co-cultured hESCs with fetal human liver clone B (FH-B-hTERT) cells to differentiate them into CD34+ HSCs. These were then co-cultured with murine bone marrow MS5 cells to promote terminal maturation of the erythroid lineage, resulting in over a 5000-fold increase expansion. However, enucleated cells were not reported. Ma et al. similarly developed a process in which hESC-derived enucleated RBCs were prepared via co-culture with mouse FL-derived stromal cells (mFLSCs), and these cultured RBCs demonstrated maturity comparable to that of native RBCs. The cRBCs had low ε-globin expression and high β-globin expression, indicating definitive erythropoiesis [50, 51].

Since the first development of iPSCs in 2006 [1], their potential as precursors to RBCs in vitro has been explored. Hanna et al. were the first to report the potential of iPSCs to differentiate into RBCs [52]. They were able to differentiate iPSCs by editing the sickle hemoglobin allele into hematopoietic progenitors in vitro, and when these progenitor cells were transplanted into mice, they differentiated into RBCs with proper morphology. Schenke-Layland et al. and Choi et al. reported that murine iPSCs differentiated into murine hematopoietic lineages while human iPSCs differentiated into human hematopoietic lineages. These findings show that iPSCs have the potential for erythroid differentiation [53, 54]. Douay et al. published the first report on the complete ex vivo differentiation of hiPSCs into RBCs, using SCF, FLT-3 ligand, TPO, bone morphogenetic protein 4 (BMP4), VEGF, IL-3, IL-6, and EPO for the formation of human embryoid bodies (hEBs) in the first step. They then used SCF, EPO, and IL-3 to produce cRBCs from hEBs [17]. Bouhassira et al. previously showed that ESCs can differentiate into cRBCs using embryonic and fetal globins [16, 55]. Using a similar protocol to differentiate ESCs from RBCs as the previous study [16, 55, 56], they cocultured transfected iPSCs with FH-B-hTERT to differentiate iPSCs into CD34+ HSCs. They then used hydrocortisone, IL-3, BMP4, FLT-3 ligand, SCF, EPO, and IGF1 to amplify and differentiate CD34+ cells, leading to erythroid lineage cells with embryonic and fetal globins [56]. Dias et al. used a co-culture system with OP9 stromal cells, and differentiated hESCs and hiPSCs to RBCs expressing predominately embryonic ε and fetal γ globin, and some β globin [57]. Finally, most recently, Douay et al. used SCF, TPO, FLT-3 ligand, BMP4, VEGF, IL-3, IL-6, and EPO, which lead to an enucleation rate of 70 ± 4% in vitro. This technique shows promise for generating fully mature RBCs in vitro [17, 58].

Technical challenges and breakthroughs

There still remain several hurdles which must be overcome before in vitro-generated RBCs can be widely used for transfusion purposes. Here, we discuss the basic principles and details of enucleation, RBC maturation, and difficulties in large-scale manufacturing, which are major restraints that limit the clinical application of iPSCs. We will also present possible methods to overcome these limitations, and the current progress of each major research group in overcoming these constraints.


Inadequate enucleation is a major barrier to the large-scale in vitro generation of RBCs, due to the complexity of the enucleation process and the difficulties in recapitulating enucleation ex vivo. Enucleation is a distinct property of native RBCs that is clinically relevant, as nucleated cells do not properly function as RBCs when transfused [59].

Enucleation occurs during the differentiation of Ortho-E into reticulocytes, as their condensed and polarized nuclei exit the cell in the form of pyrenocytes [60]. Nuclear condensation and polarization occur during the conversion of Pro-E to Ortho-E (Fig. 1), and are stimulated by various chromatin factors and histone-modifying proteins [41, 61, 62]. In Ortho-E, the cell cycle is coordinated by cyclin D3 to prepare for enucleation [63, 64]. After these prerequisites are met, Ortho-E expels their nuclei and generates reticulocytes (containing most of their cytoplasm) and pyrenocytes (containing the condensed nuclei) [59, 65]. Enucleation allows for the biconcave shape of RBCs, which increases their deformability for migrating through small capillaries [60, 66]. In addition, the extra space generated by expelling their nuclei allows RBCs to hold increased hemoglobin for carrying oxygen [60, 67]. After pyrenocytes are detached from Ortho-E, phosphatidylserine is expressed on their cellular membrane, which is an apoptotic signal; these pyrenocytes will eventually be phagocytized by EBI macrophages [40, 68]. Reticulocytes will also discard their organelles to increase their hemoglobin content and reduce their size; these organelles are also eaten by resident macrophages [21, 33].

Fig. 1
figure 1

Schematic showing the process of in vivo erythropoiesis. HSC hematopoietic stem cell, MPP multi-potent progenitor, EMkMPP erythroid-megakaryocyte primed multi-potent progenitors, BFU-E burst-forming unit erythroid, CFU-E colony-forming unit erythroid, Pro-E proerythroblast, Baso-E basophilic erythroblast, Poly-E polychromatic erythroblast, Ortho-E orthochromatic erythroblast

Since high-purity enucleated RBCs are essential for clinical usage, researchers have strived to achieve high enucleation rates. We present a summary of the enucleation rates achieved by different erythrocyte differentiation protocols using various cell sources, including cord blood HSPCs, hESCs, and hiPSCs (Table 1).

As enucleation is affected by various factors and controlled by complicated processes [41, 69], identifying the optimal conditions for achieving high enucleation rates is difficult. The maturation of erythroid lineage cells can be affected by factors such as the cell source used for in vitro erythropoiesis [70], cell culture conditions such as pH [71] and oxygen levels [72], cytokines used in the protocol [73], culture period [69], cell-cell interactions [74, 75], and the aforementioned prerequisites of enucleation [30]. The cell lineage used can significantly affect the enucleation rate when RBCs are generated in vitro. As seen in studies by Giarratana et al. and Miharada et al., cord blood HSPCs can achieve an enucleation rate of 90% when co-cultured with murine MS-5 stromal cells or human mesenchymal stem cells, or 77.5% when cultured in feeder-free conditions [43, 44]. Lapillonne et al. reported that hESCs have an enucleation rate of 52–66%, while hiPSCs have an enucleation rate of 4–10%, indicating that iPSCs yield fewer enucleated cells than ESCs [17]. Although a direct comparison cannot be made due to variations in cytokine composition, culture period, and cell lines used, it can be assumed that HSPCs are able to produce an overall higher proportion of enucleated cells, followed by hESCs.

Table 1 A list of erythrocyte differentiation protocols using various cell sources

Under similar conditions, hiPSCs are unable to produce sufficient numbers of enucleated cells [17]. The use of feeder cells is also key in determining the enucleation rate. Lu et al. generated RBCs from hESCs using OP9 feeder cells to provide a suitable microenvironment for cell differentiation and compared their results with those achieved in feeder-free conditions [78]. Feeder-free erythropoiesis resulted in only 10–30% enucleated cells compared to 30–65% in the OP9 co-culture system, suggesting that the co-culture conditions can improve the enucleation rate considerably. Finally, the culture period affects the enucleation of erythroid lineage cells. In a study by Olivier et al., the prolonged PSC robust erythroid differentiation (PSC-RED) protocol achieved higher enucleation than normal length PSC-RED by 50. However, it produced fewer cRBC/iPSCs overall, indicating that the culture period can affect both enucleation rate and erythroid expansion [70]. Rouzbeh et al. generated RBC from differentiated hESCs using embryoid bodies (EBs). They reported that terminal erythroid differentiation was dependent on EB age, as early hEBs from day 9 (EB9) showed no enucleation. In contrast, late hEBs from day 20 (EB20) showed an enucleation rate of 42–65% [69]. Because of the complex interactions governing the enucleation process, further studies on optimal culturing methods, culture periods, and the composition of cytokines and chemicals are required to achieve high enucleation efficiency.

Because identifying novel conditions to achieve high yields of enucleated cells is difficult, filtration has been used as an alternative method to obtain high-purity enucleated cells [87]. Olivier et al. filtered RBCs using a white blood cell (WBC) syringe filter and acquired near 99% enucleation [70]. Bernecker et al. also used filtration with a syringe filter and achieved 94.7%±5.2% enucleation. Although these findings suggest that filtration is a superior method for obtaining high yields of terminally mature and nucleated cells, it has a significant limitation; filtration reduces the total yield of erythroid lineage cells. Since transfusion requires enucleated cells in comparable concentrations to that of standard RBCs, which is around 2 × 1012, this is a crucial challenge to overcome [88]. Novel solutions are needed, since neither the enucleation rate nor the number of cells yielded can be compromised. Since progress on improving enucleation yields is beginning to slow down, bioreactors and iPSCs may be the best alternative, as iPSCs have outstanding proliferation ability and bioreactors can amplify the expansion of cells, which can offset the low cellular yield post-filtration (Fig. 2).

Fig. 2
figure 2

Schematic showing the application of bioreactors in in vitro erythropoiesis

Maturation of red blood cells

There are several standards when determining the maturity of RBCs, including enucleation, hemoglobin (Hb) type, and shape. Mature RBCs have a distinct biconcave shape. Erythroid lineage cells have different types of hemoglobin according to the type of erythropoiesis that they undergo [23]. Hemoglobin is composed of four heme groups and four globin chains, and the globin chains determine its type [89]. Embryonic hemoglobin (HbE) in primitive erythroblasts is created from primitive erythropoiesis, and has two ɑ-globins and two ε-globins (α2ε2), two ζ-globins and two ε-globins (ζ2ε2), or two ζ-globins and two γ-globins (ζ2γ2) [90]. After the erythropoietic niche shifts from the yolk sac to the fetal liver, the transition from primitive erythropoiesis to definitive erythropoiesis has occurred [23]. Hemoglobin produced from definitive erythropoiesis differs from that of produced from primitive erythropoiesis, as definitive erythropoiesis yields cells containing fetal hemoglobin (HbF), with two ɑ-globins and two γ-globins (α2γ2) [90]. After birth, the type of hemoglobin produced switches again, as the erythropoietic niche migrates from the fetal liver to the bone marrow. Here, definitive erythroblasts with adult hemoglobin (HbA) containing two ɑ-globins and two β-globins (α2β2) are generated [91]. In previous reports on the in vitro generation of RBCs, the characteristics of in vitro erythropoiesis were usually similar to those of definitive erythropoiesis in the fetal liver; thus, most of the generated cells possessed HbF and possessed a α2γ2 globin composition [56]. Individuals with no hematological abnormalities, such as sickle cell disease or thalassemia, have mostly HbA (97%) and low levels of HbF (< 1%). Thus, transfusion of RBCs with HbA would likely be more favored [92]. Therefore, finding methods to silence embryonic and fetal globin is necessary in establishing a foundation for transfusing in vitro-generated RBCs. Many studies have sought ways to prevent HbE and HbF production and promote HbA production.

After RBCs are generated, they must be tested to determine whether they are fully mature and possess the distinct features of in vivo-generated RBCs. In addition to the type of hemoglobin, the morphology of the generated RBCs should also be considered. The morphology of erythroid lineage cells can be assessed using the following parameters: shape, size, and color [93, 94]. Flawed RBCs often exhibit different shapes, which can cause poikilocytosis [93]. Native RBCs have a unique biconcave shape [95]. Elliptical RBCs or elliptocytes can indicate an insufficient iron supply during ex vivo erythropoiesis, and were originally seen in patients with iron deficiency anemia; transfusion of these cells may lead to decreased oxygen carrying capacity. Size and color are also parameters to identify mature RBCs, since fully matured RBCs range from 7 to 8 μm and contain an orange-red cytoplasm [28, 96]. Erythroblast precursors range from 8 μm (Ortho-E) to 19 μm (Pro-E), and usually have a grayish cytoplasm [97].

Many other assessments can be performed to evaluate the maturity and condition of RBCs [98]. Quality control is necessary when developing transfusable RBCs [99] and when iPSCs are used for clinical applications [100].

Difficulties in large-scale manufacturing

To utilize in vitro erythropoiesis-generated RBCs in therapeutics, large-scale manufacturing methods need to be developed to generate RBCs in quantities sufficient for the needs of transfusion purposes, as a single transfusion unit of standard RBCs contains 2 × 1012 RBCs [101]. To meet these demands, various protocols have been developed to produce large quantities of RBCs using sources including HSPCs, ESCs, and iPSCs [102,103,104]. In 2016, Sivalingam et al. developed a serum-free and chemically defined hESC-derived RBC generating protocol using a microcarrier-based suspension culture platform for a promising future scale-up potentiality [103]. Usage of microcarriers on the stage of EB induction have resulted in successful terminal maturation of erythroblasts, in contrast to the failure of erythroblast induction in the control group, where EB induction was conducted through a conventional method. Sivalingam et al. in 2021, developed a protocol to scale up the hiPSC-derived RBC generating process in vitro, utilizing 50mL shake-flasks and 500mL spinner flasks employing the microcarrier-based suspension culture platform in the early phases of the RBC differentiation [85]. They came up with a protocol using the perfusion bioreactor system and achieved maximal cell density of 34.7 million cells/mL, exceeding their previous protocol with maximal cell density of 17 million cells/mL [104]. As a standard unit of blood contains approximately 1–2 × 1012 cells, cell densities should exceed 1 × 108 cells/mL to satisfy the requirements, and the usage of bioreactors may be a key to meet the demands [85, 105, 106].


Blood transfusion is necessary for clinical practice; therefore, the limited supplies of red blood cells (RBCs) must be addressed. Researchers have made progress in the generation of RBCs in vitro using HSPCs, ESCs, and iPSCs using various protocols; however, several issues remain to be solved. We discussed possible methods to solve problems related to RBC enucleation, maturation, and large-scale production. Enucleation still remains a major hurdle to overcome, but filtration has shown promise for increasing the final yield of enucleated RBCs when used in combination with bioreactors. However, most of the studies conducted thus far have followed research-grade standards, whereas clinical applications require clinical- and GMP-grade protocols for safe transfusion. Currently, novel techniques for generating cost-efficient GMP-grade RBCs in vitro are urgently needed.

Data availability

All data (or sources thereof) relevant to this study are included in the article, and further inquiries can be directed to the corresponding author.

Code availability

Not applicable.



Hematopoietic Stem and Progenitor Cells


Embryonic Stem Cells


Induced Pluripotent Stem Cells


Red Blood Cell


Artificial Oxygen Carriers


Hemoglobin-Based Oxygen Carriers


Perfluorocarbon-Based Oxygen Carriers


Hematopoietic Stem Cells


Multipotent Progenitors


Erythroid Megakaryocyte-Primed Multipotent Progenitors


Burst-Forming Unit Erythroid


Colony-Forming Unit Erythroid




Basophilic Erythroblasts


Polychromatic Erythroblasts


Orthochromatic Erythroblasts


Erythroblastic Islands


Insulin-Like Growth Factor 1


Vascular Endothelial Growth Factor B


Intracellular Adhesion Molecule 4


Stem Cell Factor








Cultured Red Blood Cells


Human Embryonic Stem Cells


Mouse FL-derived Stromal Cells


Bone Morphogenetic Protein 4


Human Embryoid Bodies


Embryoid Bodies


White Blood Cell




Embryonic Hemoglobin


Adult Hemoglobin


Fetal Hemoglobin


  1. Yamanaka S, Takahashi K. Induction of pluripotent stem cells from mouse fibroblast cultures]. Tanpakushitsu Kakusan Koso. 2006;51(15):2346–51.

    CAS  PubMed  Google Scholar 

  2. Kim JY, et al. Review of the current trends in clinical trials involving Induced Pluripotent Stem cells. Stem Cell Rev Rep. 2022;18(1):142–54.

    Article  PubMed  Google Scholar 

  3. Saunders A, Faiola F, Wang J. Concise review: pursuing self-renewal and pluripotency with the stem cell factor nanog. Stem Cells. 2013;31(7):1227–36.

    Article  CAS  PubMed  Google Scholar 

  4. Ali A, Auvinen MK, Rautonen J. The aging population poses a global challenge for blood services. Transfusion. 2010;50(3):584–8.

    Article  PubMed  Google Scholar 

  5. Greinacher A, Fendrich K, Hoffmann W. Demographic changes: the impact for safe blood supply. Transfus Med Hemother. 2010;37(3):141–8.

    Article  PubMed  PubMed Central  Google Scholar 

  6. McGann PT, Weyand AC. Lessons learned from the COVID-19 pandemic blood supply crisis. J Hosp Med. 2022;17(7):574–6.

    Article  PubMed  Google Scholar 

  7. Raghuwanshi B, et al. Blood supply management amid COVID 19 pandemic: challenges and strategies. J Family Med Prim Care. 2022;11(6):2363–8.

    Article  PubMed  PubMed Central  Google Scholar 

  8. Ferenz KB, Steinbicker AU. Artificial Oxygen Carriers-Past, Present, and Future-a review of the most innovative and clinically relevant concepts. J Pharmacol Exp Ther. 2019;369(2):300–10.

    Article  CAS  PubMed  Google Scholar 

  9. Rozenberg G. [Chemically modified hemoglobin–artificial oxygen carrier]. Dokl Akad Nauk SSSR. 1978;243(5):1320–3.

    PubMed  Google Scholar 

  10. Schnoy N, Pfannkuch F, Beisbarth H. Perfluorochemicals as artificial blood. Problems and actual development (author’s transl)]. Anaesthesist. 1979;28(11):503–10.

    CAS  PubMed  Google Scholar 

  11. Khan F, Singh K, Friedman MT. Artificial blood: the history and current perspectives of blood substitutes. Discoveries (Craiova). 2020;8(1):e104.

    Article  PubMed  Google Scholar 

  12. Fergusson DA, McIntyre L. The future of clinical trials evaluating blood substitutes. JAMA. 2008;299(19):2324–6.

    Article  CAS  PubMed  Google Scholar 

  13. Keipert PE. Hemoglobin-based oxygen carrier (HBOC) development in Trauma: previous Regulatory challenges, lessons learned, and a path Forward. Adv Exp Med Biol. 2017;977:343–50.

    Article  CAS  PubMed  Google Scholar 

  14. Stella CC, et al. CD34-positive cells: biology and clinical relevance. Haematologica. 1995;80(4):367–87.

    CAS  PubMed  Google Scholar 

  15. Neildez-Nguyen TM, et al. Human erythroid cells produced ex vivo at large scale differentiate into red blood cells in vivo. Nat Biotechnol. 2002;20(5):467–72.

    Article  CAS  PubMed  Google Scholar 

  16. Olivier EN, et al. Large-scale production of embryonic red blood cells from human embryonic stem cells. Exp Hematol. 2006;34(12):1635–42.

    Article  CAS  PubMed  Google Scholar 

  17. Lapillonne H, et al. Red blood cell generation from human induced pluripotent stem cells: perspectives for transfusion medicine. Haematologica. 2010;95(10):1651–9.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  18. Glicksman MA. Induced Pluripotent Stem cells: the most versatile source for Stem Cell Therapy. Clin Ther. 2018;40(7):1060–5.

    Article  PubMed  Google Scholar 

  19. Lim WF, et al. Hematopoietic cell differentiation from embryonic and induced pluripotent stem cells. Stem Cell Res Ther. 2013;4(3):71.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  20. Tsiftsoglou AS, Vizirianakis IS, Strouboulis J. Erythropoiesis: model systems, molecular regulators, and developmental programs. IUBMB Life. 2009;61(8):800–30.

    Article  CAS  PubMed  Google Scholar 

  21. Moras M, Lefevre SD, Ostuni MA. From erythroblasts to mature red blood cells: Organelle Clearance in mammals. Front Physiol. 2017;8:1076.

    Article  PubMed  PubMed Central  Google Scholar 

  22. Zivot A, et al. Erythropoiesis: insights into pathophysiology and treatments in 2017. Mol Med. 2018;24(1):11.

    Article  PubMed  PubMed Central  Google Scholar 

  23. Palis J. Primitive and definitive erythropoiesis in mammals. Front Physiol. 2014;5:3.

    Article  PubMed  PubMed Central  Google Scholar 

  24. Sheng G. Primitive and definitive erythropoiesis in the yolk sac: a bird’s eye view. Int J Dev Biol. 2010;54(6–7):1033–43.

    Article  CAS  PubMed  Google Scholar 

  25. Schippel N, Sharma S. Dynamics of human hematopoietic stem and progenitor cell differentiation to the erythroid lineage. Exp Hematol. 2023;123:1–17.

    Article  CAS  PubMed  Google Scholar 

  26. Drissen R, et al. Distinct myeloid progenitor-differentiation pathways identified through single-cell RNA sequencing. Nat Immunol. 2016;17(6):666–76.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  27. Drissen R et al. Identification of two distinct pathways of human myelopoiesis. Sci Immunol, 2019. 4(35).

  28. Han H, Rim YA, Ju JH. Recent updates of stem cell-based erythropoiesis. Hum Cell. 2023;36(3):894–907.

    Article  PubMed  PubMed Central  Google Scholar 

  29. Li J, et al. Isolation and transcriptome analyses of human erythroid progenitors: BFU-E and CFU-E. Blood. 2014;124(24):3636–45.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  30. Zhao B, Yang J, Ji P. Chromatin condensation during terminal erythropoiesis. Nucleus. 2016;7(5):425–9.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  31. Mei Y, Liu Y, Ji P. Understanding terminal erythropoiesis: an update on chromatin condensation, enucleation, and reticulocyte maturation. Blood Rev. 2021;46:100740.

    Article  CAS  PubMed  Google Scholar 

  32. Toda S, et al. Clearance of apoptotic cells and pyrenocytes. Curr Top Dev Biol. 2015;114:267–95.

    Article  CAS  PubMed  Google Scholar 

  33. Stevens-Hernandez CJ, et al. Reticulocyte maturation and variant red blood cells. Front Physiol. 2022;13:834463.

    Article  PubMed  PubMed Central  Google Scholar 

  34. An X, Mohandas N. Erythroblastic islands, terminal erythroid differentiation and reticulocyte maturation. Int J Hematol. 2011;93(2):139–43.

    Article  PubMed  Google Scholar 

  35. Yeo JH, Lam YW, Fraser ST. Cellular dynamics of mammalian red blood cell production in the erythroblastic island niche. Biophys Rev. 2019;11(6):873–94.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  36. Li W, et al. Identification and transcriptome analysis of erythroblastic island macrophages. Blood. 2019;134(5):480–91.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  37. Li W, et al. Erythroblastic Island macrophages shape normal erythropoiesis and drive Associated disorders in erythroid hematopoietic diseases. Front Cell Dev Biol. 2020;8:613885.

    Article  PubMed  Google Scholar 

  38. Sadahira Y, Yoshino T, Monobe Y. Very late activation antigen 4-vascular cell adhesion molecule 1 interaction is involved in the formation of erythroblastic islands. J Exp Med. 1995;181(1):411–5.

    Article  CAS  PubMed  Google Scholar 

  39. Chung J, Chen C, Paw BH. Heme metabolism and erythropoiesis. Curr Opin Hematol. 2012;19(3):156–62.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  40. Segawa K, Nagata S. An apoptotic ‘Eat me’ Signal: phosphatidylserine exposure. Trends Cell Biol. 2015;25(11):639–50.

    Article  CAS  PubMed  Google Scholar 

  41. Keerthivasan G, Wickrema A, Crispino JD. Erythroblast enucleation. Stem Cells Int. 2011;2011:139851.

    Article  PubMed  PubMed Central  Google Scholar 

  42. Beaumont C, Canonne-Hergaux F. Erythrophagocytosis and recycling of heme iron in normal and pathological conditions; regulation by hepcidin]. Transfus Clin Biol. 2005;12(2):123–30.

    Article  CAS  PubMed  Google Scholar 

  43. Giarratana MC, et al. Ex vivo generation of fully mature human red blood cells from hematopoietic stem cells. Nat Biotechnol. 2005;23(1):69–74.

    Article  CAS  PubMed  Google Scholar 

  44. Miharada K, et al. Efficient enucleation of erythroblasts differentiated in vitro from hematopoietic stem and progenitor cells. Nat Biotechnol. 2006;24(10):1255–6.

    Article  CAS  PubMed  Google Scholar 

  45. Fujimi A, et al. Ex vivo large-scale generation of human red blood cells from cord blood CD34 + cells by co-culturing with macrophages. Int J Hematol. 2008;87(4):339–50.

    Article  PubMed  Google Scholar 

  46. Timmins NE, et al. Ultra-high-yield manufacture of red blood cells from hematopoietic stem cells. Tissue Eng Part C Methods. 2011;17(11):1131–7.

    Article  CAS  PubMed  Google Scholar 

  47. Giarratana MC, et al. Proof of principle for transfusion of in vitro-generated red blood cells. Blood. 2011;118(19):5071–9.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  48. Kaufman DS, et al. Hematopoietic colony-forming cells derived from human embryonic stem cells. Proc Natl Acad Sci U S A. 2001;98(19):10716–21.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  49. Vodyanik MA, et al. Human embryonic stem cell-derived CD34 + cells: efficient production in the coculture with OP9 stromal cells and analysis of lymphohematopoietic potential. Blood. 2005;105(2):617–26.

    Article  CAS  PubMed  Google Scholar 

  50. Ma F, et al. Novel method for efficient production of multipotential hematopoietic progenitors from human embryonic stem cells. Int J Hematol. 2007;85(5):371–9.

    Article  CAS  PubMed  Google Scholar 

  51. Ma F, et al. Generation of functional erythrocytes from human embryonic stem cell-derived definitive hematopoiesis. Proc Natl Acad Sci U S A. 2008;105(35):13087–92.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  52. Hanna J, et al. Treatment of sickle cell anemia mouse model with iPS cells generated from autologous skin. Science. 2007;318(5858):1920–3.

    Article  CAS  PubMed  Google Scholar 

  53. Schenke-Layland K, et al. Reprogrammed mouse fibroblasts differentiate into cells of the cardiovascular and hematopoietic lineages. Stem Cells. 2008;26(6):1537–46.

    Article  CAS  PubMed  Google Scholar 

  54. Choi KD, et al. Hematopoietic and endothelial differentiation of human induced pluripotent stem cells. Stem Cells. 2009;27(3):559–67.

    Article  CAS  PubMed  Google Scholar 

  55. Qiu C, et al. Differentiation of human embryonic stem cells into hematopoietic cells by coculture with human fetal liver cells recapitulates the globin switch that occurs early in development. Exp Hematol. 2005;33(12):1450–8.

    Article  CAS  PubMed  Google Scholar 

  56. Chang CJ, et al. Production of embryonic and fetal-like red blood cells from human induced pluripotent stem cells. PLoS ONE. 2011;6(10):e25761.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  57. Dias J, et al. Generation of red blood cells from human induced pluripotent stem cells. Stem Cells Dev. 2011;20(9):1639–47.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  58. Kobari L, et al. Human induced pluripotent stem cells can reach complete terminal maturation: in vivo and in vitro evidence in the erythropoietic differentiation model. Haematologica. 2012;97(12):1795–803.

    Article  PubMed  PubMed Central  Google Scholar 

  59. Menon V, Ghaffari S. Erythroid enucleation: a gateway into a bloody world. Exp Hematol. 2021;95:13–22.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  60. Ji P, Murata-Hori M, Lodish HF. Formation of mammalian erythrocytes: chromatin condensation and enucleation. Trends Cell Biol. 2011;21(7):409–15.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  61. Ji P, et al. Histone deacetylase 2 is required for chromatin condensation and subsequent enucleation of cultured mouse fetal erythroblasts. Haematologica. 2010;95(12):2013–21.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  62. Popova EY, et al. Chromatin condensation in terminally differentiating mouse erythroblasts does not involve special architectural proteins but depends on histone deacetylation. Chromosome Res. 2009;17(1):47–64.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  63. Sankaran VG, et al. Cyclin D3 coordinates the cell cycle during differentiation to regulate erythrocyte size and number. Genes Dev. 2012;26(18):2075–87.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  64. Soboleva S, Miharada K. Induction of enucleation in primary and immortalized erythroid cells. Int J Hematol. 2022;116(2):192–8.

    Article  CAS  PubMed  Google Scholar 

  65. McGrath KE, et al. Enucleation of primitive erythroid cells generates a transient population of pyrenocytes in the mammalian fetus. Blood. 2008;111(4):2409–17.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  66. Da Costa L, et al. Temporal differences in membrane loss lead to distinct reticulocyte features in hereditary spherocytosis and in immune hemolytic anemia. Blood. 2001;98(10):2894–9.

    Article  PubMed  Google Scholar 

  67. Migliaccio AR. Erythroblast enucleation. Haematologica. 2010;95(12):1985–8.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  68. Yoshida H, et al. Phosphatidylserine-dependent engulfment by macrophages of nuclei from erythroid precursor cells. Nature. 2005;437(7059):754–8.

    Article  CAS  PubMed  Google Scholar 

  69. Rouzbeh S, et al. Molecular signature of erythroblast enucleation in human embryonic stem cells. Stem Cells. 2015;33(8):2431–41.

    Article  PubMed  Google Scholar 

  70. Olivier EN, et al. PSC-RED and MNC-RED: albumin-free and low-transferrin robust erythroid differentiation protocols to produce human enucleated red blood cells. Exp Hematol. 2019;75:31–e5215.

    Article  CAS  PubMed  Google Scholar 

  71. Bayley R, et al. The productivity limit of manufacturing blood cell therapy in scalable stirred bioreactors. J Tissue Eng Regen Med. 2018;12(1):e368–78.

    Article  CAS  PubMed  Google Scholar 

  72. Franke K, Gassmann M, Wielockx B. Erythrocytosis: the HIF pathway in control. Blood. 2013;122(7):1122–8.

    Article  CAS  PubMed  Google Scholar 

  73. Panzenbock B, et al. Growth and differentiation of human stem cell factor/erythropoietin-dependent erythroid progenitor cells in vitro. Blood. 1998;92(10):3658–68.

    Article  CAS  PubMed  Google Scholar 

  74. Hanspal M, Smockova Y, Uong Q. Molecular identification and functional characterization of a novel protein that mediates the attachment of erythroblasts to macrophages. Blood. 1998;92(8):2940–50.

    Article  CAS  PubMed  Google Scholar 

  75. Ovchynnikova E, et al. The shape shifting story of Reticulocyte Maturation. Front Physiol. 2018;9:829.

    Article  PubMed  PubMed Central  Google Scholar 

  76. Griffiths RE, et al. Maturing reticulocytes internalize plasma membrane in glycophorin A-containing vesicles that fuse with autophagosomes before exocytosis. Blood. 2012;119(26):6296–306.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  77. Hequet O. Hematopoietic stem and progenitor cell harvesting: technical advances and clinical utility. J Blood Med. 2015;6:55–67.

    Article  PubMed  PubMed Central  Google Scholar 

  78. Lu SJ, et al. Biologic properties and enucleation of red blood cells from human embryonic stem cells. Blood. 2008;112(12):4475–84.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  79. Robertson JA. Embryo stem cell research: ten years of controversy. J Law Med Ethics. 2010;38(2):191–203.

    Article  PubMed  Google Scholar 

  80. Lee AS, et al. Tumorigenicity as a clinical hurdle for pluripotent stem cell therapies. Nat Med. 2013;19(8):998–1004.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  81. Bernecker C et al. Membrane properties of Human Induced Pluripotent Stem cell-derived cultured red blood cells. Cells, 2022. 11(16).

  82. Dorn I, et al. Erythroid differentiation of human induced pluripotent stem cells is independent of donor cell type of origin. Haematologica. 2015;100(1):32–41.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  83. Olivier EN, et al. High-efficiency serum-free feeder-free erythroid differentiation of human pluripotent stem cells using small molecules. Stem Cells Transl Med. 2016;5(10):1394–405.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  84. Sivalingam J, et al. Improved erythroid differentiation of multiple human pluripotent stem cell lines in microcarrier culture by modulation of Wnt/beta-Catenin signaling. Haematologica. 2018;103(7):e279–83.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  85. Sivalingam J, et al. A scalable suspension platform for Generating high-density cultures of Universal Red Blood cells from Human Induced Pluripotent Stem cells. Stem Cell Rep. 2021;16(1):182–97.

    Article  CAS  Google Scholar 

  86. Bernecker C, et al. Enhanced Ex vivo generation of erythroid cells from Human Induced Pluripotent Stem cells in a simplified cell culture system with Low Cytokine Support. Stem Cells Dev. 2019;28(23):1540–51.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  87. Guzniczak E, et al. Purifying stem cell-derived red blood cells: a high-throughput label-free downstream processing strategy based on microfluidic spiral inertial separation and membrane filtration. Biotechnol Bioeng. 2020;117(7):2032–45.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  88. Douay L, Andreu G. Ex vivo production of human red blood cells from hematopoietic stem cells: what is the future in transfusion? Transfus Med Rev. 2007;21(2):91–100.

    Article  PubMed  Google Scholar 

  89. Chiabrando D, Mercurio S, Tolosano E. Heme and Erythropoieis: more than a structural role. Haematologica. 2014;99(6):973–83.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  90. Manning LR, et al. Human embryonic, fetal, and adult hemoglobins have different subunit interface strengths. Correlation with lifespan in the red cell. Protein Sci. 2007;16(8):1641–58.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  91. Sankaran VG, Orkin SH. The switch from fetal to adult hemoglobin. Cold Spring Harb Perspect Med. 2013;3(1):a011643.

    Article  PubMed  PubMed Central  Google Scholar 

  92. Datta P, et al. Membrane interactions of hemoglobin variants, HbA, HbE, HbF and globin subunits of HbA: effects of aminophospholipids and cholesterol. Biochim Biophys Acta. 2008;1778(1):1–9.

    Article  CAS  PubMed  Google Scholar 

  93. Bandaru SS, Killeen RB, Gupta V. Poikilocytosis, in StatPearls. 2023: Treasure Island (FL).

  94. Ford J. Red blood cell morphology. Int J Lab Hematol. 2013;35(3):351–7.

    Article  CAS  PubMed  Google Scholar 

  95. Uzoigwe C. The human erythrocyte has developed the biconcave disc shape to optimise the flow properties of the blood in the large vessels. Med Hypotheses. 2006;67(5):1159–63.

    Article  PubMed  Google Scholar 

  96. Thiagarajan P, Parker CJ, Prchal JT. How Do Red Blood Cells Die? Front Physiol. 2021;12:655393.

    PubMed  Google Scholar 

  97. Stevens-Hernandez CJ, Bruce LJ. Reticulocyte Maturation Membr (Basel), 2022. 12(3).

  98. Diez-Silva M, et al. Shape and Biomechanical Characteristics of Human Red Blood Cells in Health and Disease. MRS Bull. 2010;35(5):382–8.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  99. Zimmermann R, et al. In vitro quality control of red blood cell concentrates outdated in clinical practice. Transfus Clin Biol. 2003;10(4):275–83.

    Article  PubMed  Google Scholar 

  100. Sullivan S, et al. Quality control guidelines for clinical-grade human induced pluripotent stem cell lines. Regen Med. 2018;13(7):859–66.

    Article  CAS  PubMed  Google Scholar 

  101. Pellegrin S, Severn CE, Toye AM. Towards manufactured red blood cells for the treatment of inherited anemia. Haematologica. 2021;106(9):2304–11.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  102. Zhang Y, et al. Large-scale Ex vivo generation of Human Red Blood cells from Cord Blood CD34(+) cells. Stem Cells Transl Med. 2017;6(8):1698–709.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  103. Sivalingam J, et al. Superior Red Blood Cell Generation from Human pluripotent stem cells through a Novel Microcarrier-based embryoid body platform. Tissue Eng Part C Methods. 2016;22(8):765–80.

    Article  CAS  PubMed  Google Scholar 

  104. Yu S, et al. Selection of O-negative induced pluripotent stem cell clones for high-density red blood cell production in a scalable perfusion bioreactor system. Cell Prolif. 2022;55(8):e13218.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  105. Bouhassira EE. Concise review: production of cultured red blood cells from stem cells. Stem Cells Transl Med. 2012;1(12):927–33.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  106. Zhou P, et al. In Vitro Generation of Red Blood cells from Stem Cell and targeted therapy. Cell Transpl. 2020;29:963689720946658.

    Article  Google Scholar 

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This research was supported by a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number : HI22C1314).

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H.J: collecting studies, writing the manuscript and figure and tables construction. Y.S and Y.N: contributed to manuscript preparation and revising the manuscript. Y.A.R: contributed to writing and revising the manuscript.

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Correspondence to Yoojun Nam or Yeri Alice Rim.

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Ju, H., Sohn, Y., Nam, Y. et al. Progresses in overcoming the limitations of in vitro erythropoiesis using human induced pluripotent stem cells. Stem Cell Res Ther 15, 142 (2024).

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