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Table 3 Ongoing clinical trials using MSCs and MSC-derived exosomes to treat COVID-19 patients

From: Potential application of mesenchymal stem cells and their exosomes in lung injury: an emerging therapeutic option for COVID-19 patients

Clinical trial identifier

Study design

Phase

Intervention/treatment

Dose and route of administration

Estimated enrollment

Control group

Country

Recruitment status

NCT04348461#

RCT, parallel assignment, multicenter, quadruple* masking

2

Allogeneic AT-MSCs

Two doses of 1.5 × 106/kg, IV

100 (50 each group)

Standard of care

Spain

Not yet recruiting

NCT04467047

Interventional, open label

1

Allogenic BM-MSCs

1 × 106 MSCs/kg, IV

10

None

Brazil

Not yet recruiting

NCT04473170

RCT, open-label

1/2

Autologous NHPBSCs

Dose: non specified, jet nebulization

146

Standard care

UAE

Completed

NCT04349540

Prospective non-interventional study

NA

Allogenic hematopoietic stem cells

Not defined

40

None

UK

Active, not recruiting

ChiCTR2000029990#

Pilot trial, interventional study

2

MSCs (undefined source)

1 × 106 per kg of weight, IV

7 patients for MSC transplant and 3 for placebo

Vehicle placebo

China

Recruiting

NCT04466098

Interventional, randomized, placebo-controlled, parallel assignment, triple masking (participant, care provider, investigator)

2

MSCs (undefined source)

300 × 106 MSCs, three fixed doses of MSCs, approximately 48 h apart, IV

30 randomized (2:1 ratio) placebo-controlled trial.

Vehicle placebo (Dextran 40 + 5% human serum albumin)

USA

Recruiting

NCT04445220

Interventional, randomized, placebo-controlled, parallel assignment, quadruple masking (participant, care provider, investigator)

1/2

Allogeneic human MSCs (undefined source)

Low dose cohort: SBI-101 device containing 250 million MSCs; high dose cohort: SBI-101 device containing 750 million MSCs, extracorporeal

24

Sham device containing no MSCs

USA

Not yet recruiting

NCT04447833

Single group assignment, open label

1

Allogeneic BM-MSCs

First three patients receive a single dose of 1 × 106 MSCs/kg dose, next six patients receive a single dose of 2 × 106 MSCs/kg, IV

9

N.A.

Sweden

Recruiting

NCT04457609

RCT, parallel assignment, triple*

1

Allogenic UC-MSCs

Intravenous infusion of 1 × 106 unit of UC-MSCs/kg BW in 100 cc of 0.9% NaCl for 1 h, in addition to standardized treatment (oseltamivir and azithromycin)

40

Placebo (oseltamivir and azithromycin)

Indonesia

Recruiting

NCT04397471

Observational, prospective

N.A

Allogenic BM-MSCs

Not defined

10

N.A.

UK

Not yet recruiting

NCT04461925

Non-randomized, parallel, open label

1/2

Allogenic placenta-derived MSCs

1 million cells/kg body weight/time, once every 3 days for a total of 3 times: day “1”, day “4”, day “7”, IV + ceftriaxone, azithromycin, anticoagulants, hormones, oxygen therapy, mechanical ventilation and other supportive therapies

30

Ceftriaxone, azithromycin, anticoagulants, hormones, oxygen therapy, mechanical ventilation and other supportive therapies

Ukraine

Recruiting

NCT04428801

RCT, double* masking

2

Autologous AT-MSCs (Celltex-AdMSCs)

200 million every 3 days (3 doses), IV

200

Placebo (not defined)

USA

Not yet recruiting

NCT04416139

Non-randomized, parallel assignment, open label

2

MSCs (undefined source/from bank)

1 million/kg in a single dose, IV

10

Standard management measures

Mexico

Recruiting

NCT04429763

RCT, parallel design, triple* masking

2

Allogenic UC-MSCs

1 × 106 cells/kg single dose, IV

30

Placebo (not defined)

Colombia

Not yet recruiting

NCT04444271

Interventional, RCT, parallel design, open label

2

Autologous BM-MSCs

2 × 106 cells/kg on days 1 and 7 (if needed), IV

20

(20 each group)

Placebo (100 ml normal saline IV)

Pakistan

Recruiting

NCT04456361

Interventional, single group assignment, open label

1

WJUC-MSCs

Single-dose of 1 × 108 cells, IV

9

N.A.

Mexico

Active, not recruiting

NCT04366271

Randomized, interventional, parallel design, open label

2

Allogeneic UC-MSCs

Single IV infusion MSCs (dose unspecified) + standard of care

106

N.A.

Spain

Recruiting

NCT04371393

RCT, parallel design, triple* masking

3

Allogenic BM-MSCs (Remestemcel-L) + standard of care

Two doses of 2 × 106 MSC/kg (doses 4 days apart ± 1 day), IV+ standard of care

300 (150 each group)

Placebo (Plasma-Lyte + standard of care)

USA

Recruiting

NCT04313322

Interventional, prospective, single group, open-label.

1

Allogenic WJ-MSCs

Three doses of 1 × 106/kg, 3 days apart, IV

5

N.A.

Jordan

Recruiting

NCT04452097

Interventional, prospective, single group, open-label.

1

UC-MSC

0.5 million cells/kg, IV, plus standard treatment

9

N.A

NA

Not yet recruiting

NCT04315987

RCT, quadruple* masking

2

NestCell® + standard of care

Four doses of 2 × 106/kg, at days 1, 3, 5, and 7, IV

90 (45 each group)

Placebo (undefined)

Brazil

Not yet recruiting

NCT04252118 (preliminary for NCT04288102)

Interventional, prospective, non-randomized, parallel assignment, open-label

1

Allogenic UC-MSCs + conventional treatment

Three doses of 3.0 × 107 at days 0, 3, and 6

20 (10 patients in each arm)

Conventional treatment

China

Recruiting

NCT04288102

RCT, quadruple* masking

2

Allogenic UC-MSCs + conventional treatment

Three doses of 4 × 107, at days 0, 3, 6, IV + standard of care

90 (60 patients assigned to treatment and 30 to control group)

Placebo (saline containing 1% human serum albumin)

China

Completed

NCT04302519

Interventional, prospective, non-randomized, single group, open-label

1

Dental pulp MSCs + conventional treatment

Three doses of 1.0 × 106 cells/kg, at days 1, 3, and 7, IV

24

N.A.

Shanghai

Not yet recruiting

NCT04273646

RCT, parallel assignment, open label

N.A.

Allogenic UC-MSCs + conventional treatment

Four doses of 5.0 × 106 cells/kg at, days 1, 3, 5, and 7, IV+ conventional treatment

48 (24 patients in each arm)

Placebo + conventional treatment

China

Not yet recruiting

NCT04299152

Prospective, two-arm, partially masked/single masking (care provider).

2

Preconditioned CB-MSC (patient mononuclear cells)

N.A.

20

Conventional treatment

China

Not yet recruiting

NCT04269525

Interventional, prospective non-randomized, single group assignment, open-label.

2

Allogenic UC-MSCs

Four doses of 3.3 × 107cells at, days 1, 3, 5, and 7, IV

10

N.A.

China

Recruiting

NCT04333368

Interventional, RCT, parallel assignment, triple* masking

1/2

Allogenic WJUC-MSCs + standard of care

Three doses of 1.0 × 106 cells/kg at days 1, 3, and 5, IV

40 (20 treated, 20 placebos)

Placebo (NaCl 0.9%) + standard of care

France

Recruiting

NCT04276987

Interventional, prospective, single group assignment, open-label

1

Allogeneic AT-MSCs-Exo + conventional treatment

Five doses of 2.0 × 108 nanovesicles, days 1, 2, 3, 4, and 5, aerosol inhalation route

30

N.A.

China

Completed

NCT04336254

Interventional, RCT, triple* masking

1/2

Allogeneic human dental pulp MSCs

Three doses of 3.0 × 107 cells/dose at, days 1, 4 and 7, IV

20

Placebo (3 ml 0.9% saline)

China.

Recruiting

NCT04348435

RCT, double-blinded

2

Allogeneic AT-MSCs (HB-adMSCs)

Five doses of either 2 × 108, 1 × 108 or 5 × 107 cells/single doses at weeks 0, 2, 6, 10, and 14, IV

100

Placebo (saline)

USA

Enrolling by invitation

NCT04352803

Non-randomized, sequential assignment, open-label

1

Autologous AT-MSCs

5 × 105/kg, IV

20

N.A.

N.A.

Not yet Recruiting

NCT04366323

RCT, parallel assignment open-label

1/2

Allogeneic AT-MSCs

Two doses of 8 × 107 cell/dose, IV

26

No intervention

Spain

Recruiting

NCT04349631

Interventional, single group assignment, open-label

2

Autologous AT-MSCs

Five doses of cells (unspecified dose), IV

56

No

USA

Enrolling by invitation

NCT04346368

RCT, single masking (participant).

1/2

BM-MSCs + conventional treatment

Single dose 1 × 106 MSCs/kg, IV

20

Placebo + conventional treatment

China

Not yet recruiting

NCT04382547

Non-randomized, parallel assignment, open label

1/2

Allogeneic Om-MSCs + conventional treatment

Doses N.A., IV

40

Conventional treatment

Belarus

Enrolling by invitation

NCT04366063

RCT, parallel assignment, open-label

2/3

MSCs (undefined source) and EV-MSCs + conventional treatment

Intervention group 1: two doses 1 × 108 at day 0, 2, IV

Intervention group 2: two doses 1 × 108 at day 0, 2 + EVs at days 4, 6, IV

60 (20 into two intervention groups, 20 control)

Conventional treatment

Iran

Recruiting

NCT04437823

Randomized, parallel assignment

2

UC-MSCs

5 × 105 UCMSCs per kg, IV on days 1, 3 and 5 besides the standard care (SOC)

20

SOC

Pakistan

Recruiting

NCT04339660

RCT, triple* masking

1/2

Allogeneic UC-MSCs

One-two doses of 1 × 106/kg (1 week apart), IV

30 (15 each group)

Placebo (saline)

China

Recruiting

NCT04392778

Interventional, RCT quadruple* masking

1/2

Allogeneic UC-MSCs

Three doses of 3 × 106 cells/kg on days 0, 3, and 6, IV

30 (10 each group)

Placebo (saline)

Turkey

Recruiting

NCT04371601

RCT, Open-label

1

Allogeneic UC-MSCs + oseltamivir

Four single doses of 1 × 106/kg, 4 days apart, IV + Oseltamivir

60

Oseltamivir

China

Active, not recruiting

NCT04355728

RCT, parallel assignment, double blinded,

1/2

Allogeneic UC-MSCs as add-on therapy + standard of care

Two doses of 100 × 106 cells, IV

24 (12 each group)

Standard of care

USA

Recruiting

NCT04362189

RCT, quadruple* masking

2

Allogeneic AT-MSCs

Four doses of 1.0 × 108 cells at days 0, 3, 7, and 10, IV

100 (50 each group)

Placebo (saline)

USA

Not yet recruiting

NCT04390152

RCT, quadruple* masking

1/2

Allogeneic WJ-MSCs + standard of care

Two doses of 50 × 106, IV

40

Hydroxychloroquine, lopinavir/ritonavir or azithromycin and placebo (standard therapy)

Colombia

Not yet recruiting

NCT04377334

Randomized, parallel assignment, Open-label

2

Allogeneic BM-MSCs

N.A.

40 (20 each group).

No intervention.

Germany

Not yet recruiting

NCT04331613

Interventional, open-label

1/2

Human embryonic stem cell-derived M cells (CAStem)

Doses of 3, 5, or 106 cells/kg, route not specified

9

N.A

China

Recruiting

NCT04390139

RCT, quadruple* masking

1/2

WJ-MSCs + standard of care

Two doses, 1 × 106 cells/kg, IV

30 (15 to each group)

Placebo + standard of care

Spain

Recruiting

NCT04400032

Interventional, non-randomized, sequential assignment, open-label

1

BM-MSCs (undefined source)

Intervention group 1: three doses 25 × 106 at day 0, 1, 3 IV

Intervention group 2: three doses 50 × 106 at day 0, 1, 3 IV

Intervention group 3: three doses 90 × 106 at day 0, 1, 3, IV

9

N.A.

Canada

Not yet recruiting

NCT04398303

RCT, double* masking

1/2

Allogeneic WJ-MSCs and WJ-MSC-CM

Intervention group 1: 1.0 × 106//kg cells in 100 ml CM+ Conventional treatment

Intervention group 2: 100 ml CM+ conventional treatment

70

Conventional treatment |+placebo

USA

Not yet recruiting

NCT04365101

RCT, open-label

1/2

Natural killer (NK) cells derived from human placental CD34+ cells

CYNK-001 infusions on days 1, 4, and 7

86 (1:1 randomization ratio)

Best supportive care

USA

Recruiting

NCT04393415

Randomized, parallel, double masking

N.A.

Allogeneic UC-MSCs

UC-MSC (undefined dose) + platelet rich plasma (PRP)

100

PRP.

Egypt

Not yet recruiting

NCT04397796

RCT, quadruple* masking

1

Allogeneic BM-MSCs

Undefined dose and route

45

Placebo (plasmalyte and albumin)

USA

Not yet recruiting

NCT03042143

RCT, quadruple*masking

1/2

Allogeneic WJ-MSCs (CD362 enriched)

Single dose of 4 × 108 cells, IV

75

Placebo (plasmalyte)

UK

Recruiting

NCT04345601

Single group, parallel assignment, open-label

1

Allogeneic BM-MSCs

Single dose of 1X108 cells, IV

30

Standard of care

USA

Not yet recruiting

NCT04361942

RCT, Triple*masking

2

Allogeneic MSCs

Single dose of 1 × 106 cells/kg, IV

24

Placebo (saline)

Spain

Recruiting

NCT04333368

RCT, Triple*masking

1/2

Allogeneic WJ-MSCs

Three doses of 1 × 106 cells/kg at days 1, 3, and 5, IV

40 (20 each group)

Placebo (0.9% saline)

France

 

NCT04389450

RCT, quadruple* masking

2

Allogeneic PLX-PAD

High and low doses groups (cell dose unspecified), 1 week apart, IM

140

Placebo

USA

Recruiting

NCT04367077

RCT, sequential assignment, quadruple* masking

2/3

BM-MSCs (MultiStem), source unspecified

Dose unspecified, IV

400

Placebo

USA

Recruiting

  1. #Trial with published results, and withdrawn trials were excluded from the table
  2. ChiCTR Chinese Clinical Trial Registry; NCTnumber ClinicalTrials.gov identifier; RCT Randomized control trial; Triple* masking participant, investigator, outcomes assessor; Double* masking participant, outcomes assessor; MSCs mesenchymal stem cells; NHPBSC non-hematopoietic peripheral blood stem cells; Remestemcel-L third-party/allogenic bone marrow of unrelated and human leukocyte antigen (HLA)-unmatched healthy adult donors; NestCell® MSC therapy produced by Cellavita; SBI-101 therapy extracorporeal mesenchymal stromal cell therapy; SBI-101 a biologic/device combination product that combines two components: allogeneic human MSCs and an FDA-approved plasmapheresis device; AT-MSCs adipose tissue mesenchymal stem cells; EV-MSCs extracellular vesicles derived from MSCs; WJUC-MSCs Wharton’s jelly of umbilical cords mesenchymal stem cells; UC-MSCs umbilical cord mesenchymal stem cells; CB-MSC cord blood MSC; AT-MSCs-Exo exosomes derived from allogeneic AT-MSCs; Om-MSCs olfactory mucosa MSCs; CM conditioned media; PLX-PAD placental mesenchymal-like adherent stromal cells; IV intravenous; IM intramuscular; N.A. not applicable