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Table 1 Randomized clinical trials reporting stem cell therapy for diabetic foot ulcers

From: Stem cell therapy for diabetic foot ulcers: a review of preclinical and clinical research

Author

Year

N

Study design

Type of cell

Administration route

Results

Follow-up (months)

Debin et al. [91]

2008

50

Two groups:

- BM-MSC

- Local wound treatment

Autologous BM-MSC

Intramuscular and subcutaneous

BM-MSC showed improved:

- Rest pain (P < 0.01)

- Claudication distance (P < 0.01)

- Ulcer healing (P = 0.012)

- Ankle-brachial index (P < 0.01)

- Angiogenesis (P = 0.01)

- Amputation rate (0.040)

3

Chen et al. [81]

2009

40

Two groups:

- BM-MSC

- Conventional individualized treatment

Autologous BM-MSC

Intramuscular

BM-MSC showed better:

- Blood flow (P = 0.01)

3

Dash et al. [97]

2009

6**

Two groups:

- BM-MSC

- Local wound treatment

Autologous BM-MSC

Intramuscular

BM-MSC showed better:

- Ulcer healing (P < 0.001)

3

Lu et al. [79]

2011

41

Two groups:

- BM-MSC

- BM-MNC

Autologous BM-MSC or BM-MNC

Intramuscular

BM-MSC showed better:

- Ulcer healing (P = 0.022)

- Limb perfusion (P = 0.040)

- Ankle-brachial index (P = 0.017)

- TcPO2 (P = 0.001)

- Magnetic resonance angiography analysis (P = 0.018)

No difference in pain relief and amputation rate

6

Jain et al. [98]

2011

48

Two groups:

- BM-MSC

- Peripheral blood

Autologous BM-MSC

Injection* and spray

BM-MSC showed better ulcer healing (P < 0.05)

3

Kirana et al. [73]

2012

24

Two groups:

- BM-MSC

- Tissue repair cells (TRC)

Autologous BM-MSC

Injection* and intraarterial

- BM-MSC 83% ulcer healing vs TRC 80% ulcer healing

- BM-MSC and TRC had better TcPO2 (P = 0.092)

- BMC-MSC improved ankle-brachial index (P < 0.10)

- Angiogenesis detected in seven of the BM-MSC/TRC groups

12

Xu et al. [72]

2016

127

Eight groups:

- Group A (G-CSF BID 5 μg/kg/day); four subgroups: 4, 5, 6 or 7 days

- Group B (G-CSF BID 10 μg/kg/day); four subgroups: 4, 5, 6 or 7 days

Autologous PB-MSC

Injection* and topical*

G-CSF BID 5 μg/kg/day during 5 days is the optimal dose to mobilize EPC in DFU patients

All groups reported improvement of life quality, pain, cold sensation, clinical symptoms and ulcer healing

1–15

Qin et al. [71]

2016

53

Two groups:

- Angioplasty

- Angioplasty and stem cell therapy

Allogeneic hUC-MSC

Intraarterial and intramuscular

Combination group showed better:

- Ankle-brachial index (P < 0.05)

- Skin temperature (P < 0.05)

- Claudication distance (P < 0.05)

- TcPO2 (P < 0.05)

1–3

  1. *These studies did not specify the subtype of administration route. **In this study, the n was 24 but only six patients h ad DFU; 18 patients were diagnosed with Buerger's disease. BID twice a day, BM-MSC bone marrow-derived mesenchymal stem cells, BM-MNC bone-marrow mononuclear cells, DFU diabetic foot ulcer, EPC endothelial progenitor cells, G-CSF granulocyte-colony stimulating factor, hUC-MSC human umbilical cord mesenchymal stem cells, PB-MSC peripheral blood-derived mesenchymal stem cells, TcPO2 transcutaneous oxygen pressure