Clinical Applications of Mesenchymal Stem Cell Therapy. Clinical Applica… · Paracrine Mechanisms...
Transcript of Clinical Applications of Mesenchymal Stem Cell Therapy. Clinical Applica… · Paracrine Mechanisms...
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Clinical Applications of Mesenchymal Stem Cell Therapy
Dr R R Sharma MDProfessor
Department of Transfusion MedicinePostgraduate Institute of Medical Education and Research,
Chandigarh, India
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What are Stem Cells?
Stem Cells are extraordinary because:
• They can divide and make identical copies of
themselves over and over again (Self-Renewal)
• Remain Unspecialized with no ‘specific’
function or become . . . .
• Specialized (Differentiated) with the potential
to produce over 200 different types of cells in
the body.
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Stem Cells are like magnets
Stem Cell
Society ResearchInstitutions
Investors Public/Private
Stem Cell Technology biotechs
Pharmaceutical Industry
Equipment Providers
Cryobiologists
Regenerative Medicine
Media
Academic leaders
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Basis of “Stemness”
Asymmetric Division
Daughter stem cell Daughter transit-amplifyingor intermediate cell
Repopulates stem cell pool
Proliferative, Migratory andDifferentiating capabilities
Intermediate cell progenitors
Mature tissue
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Maintenance of “Stemness”
The length of the telomere determines the ability of the stem cell to keep from differentiating and aging.
Thus, stem cells contain a lot of telomerase.
Telomeres contain highly conserved G-rich repeats
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Sources of Stem Cells
Totipotent : Zygote, Morula
Pluripotent : Embryonal stem cells (inner cell mass)
: Amniotic epithelical cells
: Fetal stem cells: Umbilical cord stem cells: Adult stem cells
Multipotent : Fetal stem cells: Umbilical cord stem cells: Adult stem cells
- bone marrow, peripheral blood, brain , eyes , heart, lungs , kidneys, GIT, pancreas, liver, fat, breast, ovaries, prostate, testes
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Hematopoietic Stem CellsBone marrow (1% to 3%)Mobilized peripheral blood (0.01% to 1%)Umbilical cord blood
Mesenchymal Stem/stromal CellsBone marrow (0.0001% to 0.01%)Umbilical cord blood (0.0001% to 0.0003%)Placenta (better source)
Tissue specific
Adult Stem Cells
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Mesenchymal Stem /stromal Cells
• 1st described in 1968 (Friedenstein)
– Adherent, clonogenic, fibroblastic marrow cells
• Multiple sources
• ISCT definition (2006)
– Plastic adherence
– CD73, CD90, CD105 (+); lineage markers (-)
– In vitro differentiation to bone, fat, cartilage
– Lack of HLA-Class II Antigens(Immunopriviliged )
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Adult MesenchymalStem Cell (MSC)
Chondrocyte MyoblastFusion
StromalFibroblast
Tenoblast PreadipocyteOsteoblast
Mesengenesis
BONE STROMA TENDONCARTILAGE MUSCLE ADIPOSE
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The global landscape of stem cell clinical trials
Matthew D Li, Harold Atkins Regen. Med. (2014) 9(1), 27–39
ClinicalTrials.gov & WHO’s International Clinical Trials Registry
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Matthew D Li, Harold Atkins Regen. Med. (2014) 9(1), 27–39
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Goal of stem cell therapy• Regeneration (n=916) • Cell therapy (nonregenerative) (n=126) • Gene therapy (n=96) • Stem cell collection/mobilization (n=30) • Bioscaffold (n=15)• Immunotherapy (n=13)
Stem cell type • Hematopoietic (whole marrow, CD34+, D133+ or mononuclear fractions) (n=432) •Mesenchymal (n=432)• Endothelial progenitor cells (n=69)•Other (n=69)• Neural (n=22) •Unspecified (20) •Limbal (16)• Embryonic (6) •Cardiac (6)
Principle disease/condition targeted •Cardiovascular disease (n=278)•Neurological disease (n=169)• Cancer (n=97)•Liver disease (n=67)•Bone condition (n=65))•Other (n=56)• Immunodeficiency and other nonmalignant
hematologic conditions (n=49)•Gastrointestinal disease (n=46)•Cartilage disease (n=45)•Systemic rheumatological disease (n=45)•Diabetes (n=43)• Eye disease(n=39)•Skin condition (n=19)•Organ transplant-associated (n=18) •Lung disease (n=15)•Kidney condition(n=8)
Database of clinical trials (n = 4749)Non-novel (n = 3961)
Novel (n = 1058)
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Matthew D Li, Harold Atkins Regen. Med. (2014) 9(1), 27–39
stem cell-related therapy and product development are likely to be an $8.5 billion global market by 2016
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Therapeutic Potential of Mesenchymal Stem/stromal Cells
1. Tissue repair and regeneration as they differentiate into many tissues
2. Immunomodulation
3. Enhancement of HSC engraftment
4 .Remarkable expansion after ex-vivo culture, even with platelet lysate and maintain genetic stability
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Biological Properties of MSCs
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Paracrine Mechanisms of Mesenchymal Stem Cell-Based Therapy Cell Transplantation, Vol. 23, pp. 1045–1059, 2014
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Instant blood mediated inflammatory reaction (IBMIR)
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MSC engraftment, antagonizing mechanisms, and differential priming of therapeutic effects
TIME IN HOURS
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Clinical Applications( www.clinicaltrials.gov ) June 2015 (453 Clinical Trials)
20 %
19%
18%
15%
13%
15%
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Source of MSC’S( www.clinicaltrials.gov ) June 2015 (453 Clinical Trials)
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MSCs Isolation Bone MarrowAspiration Isolation Culturing
Final ProductAdministration
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MSC Isolation from Bone Marrow
40-50 ml BM Aspiration PSIS under LA
MNC separation by Ficoll density gradient
Cell seeding (5x104 MNC/cm2 to 1.7 x 105 cells/cm2) at different conc. in – MEM (with & without Fetal bovine
serum)
50% of Medium & Non-adherent cells will be replaced with fresh medium
Procedure repeated @ 3 days until 70-80% confluency in the adherent cells
Cell replating (1-5) x 103 MSC’s/cm2 (in different conc.) to (1-5)x105 MSC’s/cm2
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QC assessment
• Cell counts – Automated cell counters
• Viability – Trypan blue dye exclusion/Acridine orange/Propidium iodide
( ≥70%)
• Immunophenotyping - CD105>75%, CD73>85%, CD-90>85%
CD-34 & 45 (<5%)
• Trilineage differentiation assay - Osteo, chondro and adipogenic
lineages
• Aerobic/Anaerobic bacterial cultures, fungal cultures
• Mycoplasma testing
• Endotoxin Assay <5 EU/kg/dose
• Dose of MSC’s-- 1X106 cells /Kg
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Day 8 (10X) Day 16 (10X) Day 24 (10X)
hMSC
Adipocyte differentiation
Control (10X) After differentiation10X 20X
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Osteocyte differentiation
Control (10X) After differentiation10X 20X
Before differentiation (10X)
Control undifferentiated (40X) Differentiated MSC
Cardiomyocytes differentiation
Actinin (40X) Troponin (40x)
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Negative Positive
CD34-PE
CD45-FITC
CD105-FITC
CD90-PE
CD73-PE
Fig: A- Unstained(US) MSC
Fig: B- MSC showing positive for Stemness marker
Fig: C- MSC negative for Hematopoietic lineage marker
Characterization of MSC
BA
90%
97%
97%US
US
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Effect Of Mesenchymal Stem Cells On The T Cell Repertoire Of Kidney Transplant Patients
Results: T cell proliferation is markedly reduced with MSC therapy at various time points post transplantation. T-Cells that generally progress through six divisions using CFSE dilution assay were arrested following two divisions at 90 days post transplantation.
Trans-differentiation of cultured Mesenchymal Stem Cell into islets cells
Results: Evaluated the therapeutic effects of MSC (2x106/kg) infused intravenously to streptozotocin induced diabetic wistar rats, two times at day 7 and 21 of diabetic induction, reported decreased sugar levels.
Autologous Bone Marrow Mononuclear Cells In Idiopathic Membranous Nephropathy
Results: Autologous MNC cell infused to patients with biopsy proven IMN showed a transitory reduction in proteinuria and improvement in serum albumin in treatment refractory IMN.
MSCs Clinical Studies Done at Stem Cell Research Facility
PGIMER,Chandigarh
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Indian J Med Res 142, July 2015, pp 63-71 DOI:10.4103/0971-5916.162116
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Adult mesenchymal stem cells and chronic burn wound epithelialization
Results: Autologous bone marrow derived mesenchymal stem cell transplantedto, two areas similar in size and depth of burns, followed by split skin grafting.The test wounds healed completely at an earlier date compared to the controlwounds in six patients.
Mesenchymal stem cell and Osteoarthritis
Results: Intra-articular injection of autologous MSCs can be considered apotential treatment of early osteoarthritis knee which relieves pain, stiffness,improves physical functions and improves the articular cartilage integrity torelief treatment of OA.
Autologous mesenchymal stem cells and meniscal tear of knee joint
Results: Autologous MSC infused to patients showed a transitory reduction in painand improvement in meniscal tear.
Human dental pulp stem cells (DPSCs), umbilical cord, blood
Techniques used: isolation of dental pulp, follicle and apical papilla, expansion, characterization and differentiation to adipocyte and osteocytes.
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Challenges in Clinical Medicine
1. What SCs to use?
2. At what stage of the disease will therapy be
most effective?
3. What dose, which site?
4. Single or multiple doses?
5. Regulatory Framework
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Donor Related Issues
• Requirements similar to other tissue based products(Allogeneic Bone Marrow donors)
• Stringent Donor screening for infectious & genetic disease testing (one donor-multiple recipients)
• Age of Donor(10-fold birth teenage &10-fold teenage -elderly
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Stem cell based therapeutics large scale manufacturing
• Regulatory requirements
biological license application
Establishment of safety and efficacy
• Investigational new drug application
• Compliance with GMP/GTP
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Stem cell use in patients, other than that for hematopoietic stem cell reconstitution for approved indications, is investigational at present. Accordingly, any stem cell use in patients must only be done within the purview of an approved and monitored clinical trial with the intent to advance science and medicine, and not offering it as therapy. In accordance with this stringent definition, every use of stem cells in patients outside an approved clinical trial shall be considered as malpractice.
Regulatory Issues
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Regulatory Issues
• Institutional committee on Stem cell research (ICSCR)&Institutional Ethics Committee (IEC)
• National Apex Committee for Stem Cell Research and Therapy (NAC-SCRT)
• All Pre-clinical/Clinical trials SCR must be registered with ICMR Clinical Trial Registry
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Future Directions in MSC Research
• Need to identify an ideal source
• Optimization Culture, characterization and
cryopreservation Techniques
• Understanding of the biology of Paracrine effects
• Defining appropriate cell dose and frequency
• Appropriate Donor Selection
• Working as per the regulatory frame work
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Churning of the Ocean …….
For the Nectar of Immortality
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Matthew D Li, Harold Atkins Regen. Med. (2014) 9(1), 27–39