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Prochymal adult human mesenchymal stem cells

Phase 3

Crohn's Disease | Cell therapy | Gastrointestinal |Mesoblast Limited|Trials Updated: Mar 11, 2026

Prochymal adult human mesenchymal stem cells development status

Highest phase Phase 3
Registered trials 9 across 1 sponsor since Feb 2006

Prochymal adult human mesenchymal stem cells target and mechanism

ModalityCell therapy

Also known as PROCHYMAL

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials10
Total Enrollment1,319

FDA Designations

No designations recorded

Prochymal adult human mesenchymal stem cells clinical trials

Prochymal adult human mesenchymal stem cells · 10 trials · 10 indications

Phase 3 5Phase 2 5
NCT01233960Evaluation of PROCHYMAL® for Treatment-refractory Moderate-to-severe Crohn's DiseaseCrohn's Disease
COMPLETED73 Analytics
NCT00562497Efficacy and Safety of Prochymal® Infusion in Combination With Corticosteroids for the Treatment of Newly Diagnosed Acute Graft Versus Host Disease (GVHD)Graft Versus Host Disease
COMPLETED192 Analytics
NCT00543374Extended Evaluation of PROCHYMAL® Adult Human Stem Cells for Treatment-Resistant Moderate-to-Severe Crohn's DiseaseCrohn's Disease
COMPLETED98 Analytics
NCT00482092Evaluation of PROCHYMAL® Adult Human Stem Cells for Treatment-resistant Moderate-to-severe Crohn's DiseaseCrohn's Disease
COMPLETED330 Analytics
NCT00366145Efficacy and Safety of Adult Human Mesenchymal Stem Cells to Treat Steroid Refractory Acute Graft Versus Host Disease (GVHD)Graft Versus Host Disease
COMPLETED260 Analytics
PHASE3COMPLETED
Evaluation of PROCHYMAL® for Treatment-refractory Moderate-to-severe Crohn's Disease
Crohn's DiseaseUnlock trial analytics
PHASE3COMPLETED
Efficacy and Safety of Prochymal® Infusion in Combination With Corticosteroids for the Treatment of Newly Diagnosed Acute Graft Versus Host Disease (GVHD)
Graft Versus Host DiseaseUnlock trial analytics
PHASE3COMPLETED
Extended Evaluation of PROCHYMAL® Adult Human Stem Cells for Treatment-Resistant Moderate-to-Severe Crohn's Disease
Crohn's DiseaseUnlock trial analytics
PHASE3COMPLETED
Evaluation of PROCHYMAL® Adult Human Stem Cells for Treatment-resistant Moderate-to-severe Crohn's Disease
Crohn's DiseaseUnlock trial analytics
PHASE3COMPLETED
Efficacy and Safety of Adult Human Mesenchymal Stem Cells to Treat Steroid Refractory Acute Graft Versus Host Disease (GVHD)
Graft Versus Host DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Disease remission
180 Days after first infusion in Protocol 603

Crohn's Disease Activity Index (CDAI) at or below 150 and increase in IBDQ

Percentage of Participants with Treatment Success
90 Days

Treatment was considered a success if all of the following conditions were met: Achieved induction of a complete response (CR) within 28 days after first infusion; CR followed by 28 days maintenance of a clinically meaningful response defined as the response that did not require an increase in corticosteroid dose (methylprednisolone doses \>2 milligram/kilogram/day \[mg/kg/d\] or prednisone doses \>2.5 mg/kg/d) for more than 7 consecutive days; Did not require second line/escalation therapy through Study Day 56; and survived 90 study days.

Duration of clinical benefit (Crohn's disease activity index)
6 months
Re-induction of clinical benefit (Crohn's disease activity index)
6 months
Disease remission (CDAI at or below 150)
28 days
Percentage of Participants achieving Complete Response of Greater Than or Equal to 28 Days Duration
up to 100 Days post first infusion

A complete response was defined as complete resolution of all clinical signs of Graft versus host disease (GVHD)- that had to be maintained for at least 28 consecutive days (durable complete response \[DCR\]) within 100 days post first infusion.

Change from Baseline in Cardiac Magnetic Resonance (CMR) imaging-determined End Systolic Volume (ESV) at Month 3
Baseline, Month 3
C-peptide area under the concentration curve (AUC) response (MMTT)
1 year
Number of Participants with Adverse Events (AEs)
Up to 2 Years
Number of Participants with Reduction in Crohn's Disease Activity Index (CDAI) of at Least 100 Points
28 days

The CDAI is a composite index of 8 disease variables (stool frequency, severity of abdominal pain, degree of general well-being, presence or absence of extra-intestinal manifestations or fistula, use or non-use of antidiarrheal agents, presence or absence of an abdominal mass, hematocrit, and body weight). Scores range from approximately 0 to 600, with a higher score indicating more disease activity.

Response by Day 28
Day 28

Responses included complete response (CR), partial response (PR), failure to respond. CR is defined as a complete resolution of graft-versus-host disease (GVHD). PR is defined as improvement in at least one organ by at least one full stage in the absence of progression in any other organ, or resolution of GVHD in at least one organ with a need for additional treatment because of abnormalities persisting in another organ. Failure to respond is defined as progression of GVHD.

Secondary Endpoints

Disease Improvement
180 Days after first infusion in Protocol 603
Improvement in Quality of Life (IBDQ)
180 Days after first infusion in Protocol 603
Number of Adverse events as a measure of safety
180 Days after first infusion in Protocol 603
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Prochymal®EXPERIMENTALInfusions of Prochymal on days 42-45, 84-87, and 126-129 after first infusion in Protocol 603. Each infusion of PROCHYMAL (remestemcel-L) will contain 200 million cells.
PlaceboPLACEBO_COMPARATORParticipants will receive 6 infusions of placebo-matching Prochymal® intravenously (IV) during the first 4 weeks of the study. The first infusion will be administered within 72 hours of the start of systemic corticosteroid therapy. Participants will receive 4 infusions during the first 2 weeks (twice weekly at least 3 days apart), followed by 2 infusions administered once weekly over the subsequent 2 weeks up to Day 28.
Prochymal® 2x10^6 hMSC/kgACTIVE_COMPARATORParticipants will receive 6 infusions of Prochymal® 2x10\^6 human mesenchymal stem cells (hMSC)/kg IV during the first 4 weeks of the study. The first infusion will be administered within 72 hours of the start of systemic corticosteroid therapy. Participants will receive 4 infusions during the first 2 weeks (twice weekly at least 3 days apart), followed by 2 infusions administered once weekly over the subsequent 2 weeks up to Day 28.
PROCHYMAL Low doseACTIVE_COMPARATORLow dose (total of 600 million cells).
PROCHYMAL High doseACTIVE_COMPARATORHigh dose (total of 1200 cells).
Prochymal® - Low doseACTIVE_COMPARATORParticipants will receive a total dose of Prochymal® 600 x 10\^6 cells, IV infusion, on four days, once daily.
Prochymal® - High doseACTIVE_COMPARATORParticipants will receive a total dose of Prochymal® 1200 x 10\^6 cells, IV infusion, on four days, once daily.
ProchymalEXPERIMENTALPROCHYMAL®
Prochymal™EXPERIMENTALParticipants received Prochymal™ a total of 400×10\^6 cells, intravenous (IV) infusions on Days 0, 30, 60, and 90.
High doseEXPERIMENTALHigh dose (8 million cells per kg of body weight)
Low doseEXPERIMENTALLow dose: 2 million cells per kg body weight

Interventions

NameTypeDescription
Prochymal®DRUGPROCHYMAL will be administered IV in a total volume of 300 ml (200 million cells) at a rate of 4-6 ml/minute. Treatments will be administered on Days 42-45, Days 84-87, and Days 126-129 following first infusion in Protocol 603.
PlaceboOTHERPlacebo-matching Prochymal® intravenous infusion.
CorticosteroidOTHERAdministration will be intravenously as prescribed by the caregiver.
PROCHYMAL adult human mesenchymal stem cellsDRUGintravenous infusion four times over two weeks; possibly repeated once
Standard of Care for GVHDDRUGInstitutionally defined standard of care (e.g., maintenance of steroid treatment and the addition of a second-line therapy)
Prochymal™DRUGIV infusion of ex- vivo cultured adult human mesenchymal stem cells.
Prochymal™ adult human mesenchymal stem cellsDRUGCells in plasmalyte and containing dimethylsulfoxide
adult human mesenchymal stem cellsDRUGtwo infusions, one week apart, each comprising adult human mesenchymal stem cells
ProchymalDRUGIntravenous infusion of ex-vivo cultured adult human mesenchymal stem cells
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites20

Inclusion Criteria: * Participant must have qualified for, enrolled in, and provided written informed consent form (ICF) and authorization for use and disclosure of protected health information (PHI) for Protocol 603 after the August 3, 2010. * Participant successfully completed all screening asses...

Countries:United StatesAustraliaNew ZealandCanadaItalySwitzerlandUnited Kingdom
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Frequently asked questions about Prochymal adult human mesenchymal stem cells

What is Prochymal adult human mesenchymal stem cells?

Prochymal adult human mesenchymal stem cells is an investigational cell therapy developed by Mesoblast Limited for Crohn's Disease. It is being studied in patients with treatment-resistant moderate-to-severe Crohn's Disease. The product is administered as a cell-based treatment rather than a conventional small molecule or antibody drug.

What is Prochymal adult human mesenchymal stem cells used for?

Prochymal adult human mesenchymal stem cells is being studied for the treatment of Crohn's Disease, specifically treatment-resistant moderate-to-severe cases. Both registered trials enrolled adults aged 18 years and older with this gastrointestinal condition. It is an investigational therapy and is not established as a marketed treatment.

Who makes Prochymal adult human mesenchymal stem cells?

Prochymal adult human mesenchymal stem cells is developed by Mesoblast Limited, which trades under the ticker MESO. Mesoblast is the sponsor of the clinical program evaluating the cell therapy in Crohn's Disease across completed Phase 2 and Phase 3 studies.

What phase is Prochymal adult human mesenchymal stem cells in?

Prochymal adult human mesenchymal stem cells has reached Phase 3 development for Crohn's Disease. Two trials are registered, one Phase 2 and one Phase 3, and both are completed. No trials are currently active, and the program remains investigational rather than approved.

What clinical trials is Prochymal adult human mesenchymal stem cells in?

Two completed trials are registered for Prochymal adult human mesenchymal stem cells. NCT00294112 was a Phase 2 study in moderate-to-severe Crohn's Disease conducted in the United States with 10 participants. NCT00543374 was a Phase 3 extended evaluation in treatment-resistant moderate-to-severe Crohn's Disease run in the United States and Canada with 98 participants.

Is Prochymal the same as Prochymal adult human mesenchymal stem cells?

Yes. Prochymal and Prochymal adult human mesenchymal stem cells refer to the same cell therapy product developed by Mesoblast Limited. The trademarked name Prochymal is used interchangeably with the full descriptive name in trial titles and program references for the Crohn's Disease studies.