Overview
As a Hematologist/Oncologist and Vascular Biologist, I have a broad basic science and clinical background in transplantation and organ regeneration, and tumor niche targeting. My group was the architect behind the development of the therapeutic "Vascular Medicine" discipline. We have devised innovative technologies and mechanistic approaches to set forth the novel concept that endothelial cells are not just passive conduits to deliver nutrients but rather establish an instructive vascular niche, by deploying unique angiocrine growth factors, regulate homeostasis of normal and malignant stem cells. We have developed technologies to manufacture the first-in-man infusional endothelial cells to regenerate injured organs or target cancerous tissues. This work is being translated to the clinical setting in an ongoing phase I/II trials for intravenous infusion of the endothelium to stimulate organ repair without provoking fibrosis.
Highlights
- 1Nature · 2020
- 2Nature immunology · 2025
- 3Cell stem cell · 2022
Publications
Funding
Active
19 grants- KPK08DK147686-01Molecular determinants of islet-specific endothelium for regulation of beta-cell homeostasisNational Institute of Diabetes and Digestive and Kidney Diseases · 2026–2031
- PIU01AI195524-01Adaptable and hemodynamic Gut-On-VascularNet models to mitigate radiation injuryNational Institute of Allergy and Infectious Diseases · 2026–2031
- Co-IR01HL175556-01A1Controlling the Niche to Control Clonal HematopoiesisNational Heart, Lung, and Blood Institute · 2025–2029
- KPK08HL166958-01A1Protective role of Endothelial Receptor Interacting Protein Kinase 3 (RIPK3) in acute lung injuryNational Heart, Lung, and Blood Institute · 2024–2029Career
- MPIR01DK137517-04Abnormal Extracellular Vesicles and Particles from Human Islets Impact T1D progressionNational Institute of Diabetes and Digestive and Kidney Diseases · 2023–2028
- PIR01DK136327-04Molecular Determinants of liver sinusoidal endothelial cells for hepatic regenerationNational Institute of Diabetes and Digestive and Kidney Diseases · 2023–2028
- Sub-PIR01DK137806-03Human iPSC intestine mimetics with integrated mesenchymal, endothelial and enteric nervous tissue.National Institute of Diabetes and Digestive and Kidney Diseases · 2024–2028 · via University of Michigan
- MPIR33HL154310-05In vitro modeling of blood brain barrier dysfunction on a chip to elucidate the pathogenesis of cerebral malariaNational Heart, Lung, and Blood Institute · 2021–2027
- Co-I1-INO-2026-1906-A-NIntrinsic Tolerance in GINS: Dissecting the HVEM/BTLA Axis Driving HypoimmunogenicityBreakthrough T1D · 2026–2027
- PIR35HL150809-07Adaptable tissue-specific endothelial cells for organ regenerationNational Heart, Lung, and Blood Institute · 2020–2027
- Sub-PI2-SRA-2024-1525-S-BImproving pig islet transplant efficacy in a preclinical baboon diabetes model with induced immune tolerance to the xenograftsJuvenile Diabetes Research Foundation · 2024–2026 · via Columbia University
- PI3-SRA-2023-1446-S-BCo-transplantation of adaptive human endothelium and islets within encapsulated angiogenic hydrogels for durable engraftmentJuvenile Diabetes Research Foundation · 2023–2026
- PISCRF 253844-01Sarnoff Cardiovascular Research Foundation 2025-2026 Fellowship Host Institution AgreementSarnoff Cardiovascular Research Foundation · 2025–2026
- PIR01DK125817-03Investigating a master regulator of large intestine stem cellsNational Institute of Diabetes and Digestive and Kidney Diseases · 2021–2026· 3 renewals
- PIR01DK133701-04Engineering islet-like organoids from gastric stem cells for T1D cell replacement therapyNational Institute of Diabetes and Digestive and Kidney Diseases · 2022–2026
- PIR01DK133332-04Derivation of pancreatic islet-like organoids from human gastric stem cellsNational Institute of Diabetes and Digestive and Kidney Diseases · 2022–2026
- PIBP 242176-02Subcutaneous transplantation of Islet-specific endothelial cell vascularized islets to treat diabetesDaedalus Fund for Innovation (Weill Cornell) · 2024–2026BioPharma Alliance
- KPR01HD101452-05Negative feedback regulation of growth factor signaling in adult spermatogonial stem cellsEunice Kennedy Shriver National Institute of Child Health and Human Development · 2021–2026
- Co-IR01HL157387-01A1Charting the differentiation topology of SF3B1 mutated clonal hematopoiesis (CH) and myelodysplastic syndromes (MDS) via a multi-omics single-cell toolkitNational Heart, Lung, and Blood Institute · 2022–2026
Completed grants (53)
- Sub-PI75N91024C00068An Organ-on-VacularNet model for in vitro evaluation of radiation and drug therapiesNational Cancer Institute · 2024–2025 · via Chromologic
- Co-IR01GM129380-01H3.3-mediated epigenetic regulation of developmental bivalent genes for reprogramming and differentiationNational Institute of General Medical Sciences · 2018–2025
- MPIR21HD107212-02Methods for detection of dynamic intracellular signals in single adult spermatogonial stem cellsEunice Kennedy Shriver National Institute of Child Health and Human Development · 2023–2025
- PIU01AI138329-05Endothelial cell transplantation for multi-organ repair to counter radiation injuryNational Institute of Allergy and Infectious Diseases · 2018–2025
- PIDFI 226165-03Developing a novel cell therapy to treat Type 1 diabetesDaedalus Fund for Innovation (Weill Cornell) · 2022–2025BioPharma Alliance
- PISA 233903-01Tumor-On-VascularNet Platform for Enabling Immune Cancer TargetingBristol-Myers Squibb · 2023–2024Contract
- PIJDRF 220093-01Subcutaneous Transplantation of Pre-Vascularized Human Islets and SC-β cells to Treat Type I DiabetesJuvenile Diabetes Research Foundation · 2022–2024
- Co-IK01HL145365-01The Pulmonary Lymphatics in Inflammation and DiseaseNational Heart, Lung, and Blood Institute · 2019–2024
- Sub-PIU01AI138331-06Dkk1-Endothelial Progenitor Cell Treatment for the Mitigation of Hematopoietic Radiation InjuryNational Institute of Allergy and Infectious Diseases · 2021–2024 · via Medical College of Wisconsin
- Co-IDOH01-C32558GG-3450000Weill Cornell Training Program in Stem Cell Biology and Regenerative MedicineNew York State Stem Cell Science (NYSTEM) · 2018–2023
- Sub-PIRC2DK114777-06Niche signals in HSC genesisNational Institute of Diabetes and Digestive and Kidney Diseases · 2017–2023 · via Fred Hutchinson Cancer Center· 2 renewals
- PITri-SCI #2021-013Molecular determinants of vascular niche maladaptation in dysregulated clonal evolution of stem cellsTri-Institutional Stem Cell Initiative (Weill Cornell) · 2021–2023
- PIAddgene 699655Addgene 699655Addgene, Inc. · 2022–2023
- PIAddgene 695996Addgene 695996Addgene, Inc. · 2022–2023
- KPAHA 212300-01ABCG2+ Endothelial Stem and Progenitor Cells for Regeneration of Vascularized TissuesAmerican Heart Association · 2021–2023
- Co-IR01HL055330-20A1Inflammasomes: Regulation and Function in Acute Lung InjuryNational Heart, Lung, and Blood Institute · 2018–2023
- PITDCA 222023-01Takeda Biopharma AgreementTakeda Development Center Americas, Inc. · 2021–2022BioPharma Alliance
- KPNYSCF- D - F66Generation of functional iPS-derived hepatocytes with engineered liver sinusoidal vascular niche (NYSCF Druckenmiller Fellow)New York Stem Cell Foundation Inc. · 2019–2022
- PI2019-029Engineer Adaptable Thymic Vascular Niche for Immune ReconstructionTri-Institutional Stem Cell Initiative (Weill Cornell) · 2020–2022
- Sub-PIDOH01-C34052GG-3450000Editing hepatic sinusoidal vascular niche to induce fibrosis-free liver repairNew York State Department of Health · 2018–2021 · via Mount Sinai School of Medicine
- PIDOH01-C32596CGHedgehog Signaling in Adult Choroid: Implications for Stem Cell Therapy of Retinal DiseaseNew York State Stem Cell Science (NYSTEM) · 2020–2021
- Co-IDOH01-C32581GG-3450000Contribution of H3.3-mediated chromatin dynamics to stem cell pluripotency and developmental potentialNew York State Stem Cell Science (NYSTEM) · 2018–2021
- MPIDOH01-C32596GG-3450000Hedgehog Signaling in Adult Choroid: Implications for Stem Cell Therapy of Retinal DiseaseNew York State Stem Cell Science (NYSTEM) · 2018–2021
- PICO30160Vascular Niche Platform to Expand Hematopoietic Stem and Progenitor Cells Engineered to Cure Sickle Cell DiseaseNew York State Stem Cell Science (NYSTEM) · 2015–2020
- Sub-PINYSTEM Contract #C32568GGAngiocrine functions of endothelium in regulating stem cell driven cerebellar repairNew York State Stem Cell Science (NYSTEM) · 2018–2020 · via Memorial Sloan Kettering Cancer Center
- PIDFI 200276-01De novo generation of pre-clinical grade engraftable hematopoietic stem cells from nonhuman primate endotheliumDaedalus Fund for Innovation (Weill Cornell) · 2018–2020
- PIR01HL128158-05Deciphering Molecular Determinants of Vascular Heterogeneity for Organ RepairNational Heart, Lung, and Blood Institute · 2014–2020
- PIR01HL139056-03Molecular Determinants of endothelial transition into engraftable hematopoietic cellsNational Heart, Lung, and Blood Institute · 2018–2020
- Co-IHMTF 16060851-03Curing MDS using Hematopoietic Cells Reprogrammed from Autologous, Normal Endothelial CellsHenry and Marilyn Taub Foundation · 2016–2020
- Sub-PINPRP 8-1898-3-392Engineering Autologous Vascular-Converted Hematopoietic Cells for Treatment of HemoglobinopathiesQatar National Research Fund · 2016–2019 · via Weill Cornell Medical College/Qatar
- PI2016-013Conversion of Human Adult Endothelium Into Hematopoietic Stem Cells for Immune Cell EngineeringTri-Institutional Stem Cell Initiative (Weill Cornell) · 2016–2019
- KP2014-004Endothelial mTOR Signaling Regulates Hematopoietic Stem Cell AgingTri-Institutional Stem Cell Initiative (Weill Cornell) · 2014–2018
- KPTSCI 2016-024Rapid Prototyping of MPN Phenotypes Using Endothelium-Derived, Reprogrammed Hematopoietic CellsTri-Institutional Stem Cell Initiative (Weill Cornell) · 2016–2018
- PIR13AI131445-012017 Angiogenesis Gordon Research Conference & Gordon Research SeminarNIAID · 2017–2018 · via NIH RePORTER
- Co-IC029156A Shared Facility for the Derivation, Validation, and Distribution of Stem Cells for Disease ModelingNew York State Stem Cell Science (NYSTEM) · 2014–2018
- Co-ISanofi RAAA rational immuno-oncology strategy to target tumor associated stromal cells using untibodies.Sanofi S.A. · 2016–2017Contract
- PIR01HL119872-03Identification of Vascular-Derived Signals for Alveolar Lung RepairNational Heart, Lung, and Blood Institute · 2013–2017
- Sub-PIR01HL115128-04Pluripotent Stem Cell Therapies for Genetic DiseasesNational Heart, Lung, and Blood Institute · 2013–2017 · via Fred Hutchinson Cancer Research Center
- PIR01DK095039-04Identification of Vascular Inductive Signal in Liver RegenerationNational Institute of Diabetes and Digestive and Kidney Diseases · 2012–2017
- KPR56HL116436-01A1EPromoting Hematopoietic Regeneration After Chemo by Rescheduling HomeostasisNational Heart, Lung, and Blood Institute · 2014–2016
- Sub-PIU54CA163167-03Role of Perivascular Microenvironment in Primary and Metastatic Brain Tumors (Project 3)National Cancer Institute · 2011–2016 · via Fred Hutchinson Cancer Research Center· 2 renewals
- KPR01HD061403-04Genetic and Transcriptional Control of Spleen DevelopmentEunice Kennedy Shriver National Institute of Child Health and Human Development · 2010–2015
- Sub-PIU01HL099997-06 EWNHLBI Progenitor Cell Biology Consortium Administrative Coordinating CenterNational Heart, Lung, and Blood Institute · 2013–2015 · via University of Maryland, Baltimore
- PIR01HL097797-04Contribution of the Vascular Niche to the Hematopoietic ReconstitutionNational Heart, Lung, and Blood Institute · 2009–2013
- PIRC2HL101846-02Dynamic regulation of the epigenome during hematopoietic differntiationNHLBI · 2009–2012 · via NIH RePORTER
- MPIP50HL084936-05Contribution of CXCR4+VEGFR1+ Hemangiogenic Progenitors to Lung RevascularizationNHLBI · 2006–2011 · via NIH RePORTER
- PIRC1AI080309-01Reconstitution of thrombopoiesis by angiogenic factorsNIAID · 2009–2011 · via NIH RePORTER
- PIR21HL083222-02Therapy of thrombocytopenic disorders by chemokinesNHLBI · 2006–2007 · via NIH RePORTER
- PIR01HL075234-04Vascular Heterogeneity Determination by Marrow Progenit*NHLBI · 2003–2007 · via NIH RePORTER
- MPIP01HL059312-10Regulation of hemangiogenesis by adenoviral E4 genesNHLBI · 2002–2007 · via NIH RePORTER
- MPIU01HL066952-04BONE MARROW TOTIPOTENT STEM CELLS & ADENOVIRAL VECTORSNHLBI · 2000–2005 · via NIH RePORTER
- PIR01HL061849-05CHEMOKINE RECEPTORS AND ITP AND HIV THROMBOCYTOPENHLBI · 1998–2003 · via NIH RePORTER
- MPIP01HL067839-05Postnatal angiogenesis and marrow derived precursor cellNHLBI · 2002–2003 · via NIH RePORTER
Honors & distinctions
- Member · Association of American Physicians · 2022
- Investigator · Howard Hughes Medical Institute · 2005
- Member · American Society for Clinical Investigation · 2001
Available technologies
- Generation of Human Glomerular Endothelial Cells for Kidney Disease Research and Treatment9220Application filedPoC DataPMID 31836710
News mentions
- Mapping Human Bone Marrow Yields New Tool, Insights on Blood CancerJuly 20, 2026
Weill Cornell Medicine investigators have developed a new AI-based method to assess patients with a form of blood cancer called myelodysplastic neoplasms.
- Innovators Pitch Cell Therapies and AI Tools at Biomedical Innovation ChallengeJune 10, 2026
The eighth cohort of the Biomedical Innovation Challenge showcased its innovations and development plans during a lightning round of pitches and judges’ questions on June 4 in the Belfer Research Building.
- Galvanizing Blood Vessel Cells to Expand for Organ TransplantationOctober 14, 2025
Scientists have discovered a method to induce human endothelial cells from a small biopsy sample to multiply in the laboratory, producing more than enough cells to replace damaged blood vessels or nourish organs for transplantation, according to a preclinical study by Weill Cornell Medicine investigators.
- FLIpping the Switch: Boosting Stem Cell Numbers for TherapiesMarch 10, 2025
A single molecular switch is essential for blood stem cells to enter an activated, regenerative state in which they produce new blood cells, according to a preclinical study led by Weill Cornell Medicine investigators.
- Islet Transplantation with Blood Vessel Cells Shows Promise to Treat Type 1 DiabetesFebruary 21, 2025
Adding engineered human blood vessel-forming cells to islet transplants boosted the survival of the insulin-producing cells and reversed diabetes in a preclinical study led by Weill Cornell Medicine investigators.
Show 14 more mentions
- Mapping of Specialized Blood Vessel Cells May Lead to Diabetes TreatmentsFebruary 6, 2025
The distinct population of endothelial cells that line blood vessels in the insulin-producing “islets” of the human pancreas have been notoriously difficult to study, but Weill Cornell Medicine investigators have now succeeded in comprehensively detailing the unique characteristics of these cells.
- Scientists Identify Blood Vessel Repair CellsJuly 3, 2024
Endothelial cells with a distinct gene-expression signature play a key role in the development and repair of blood vessels throughout life, according to a new study by Weill Cornell Medicine investigators.
- Corrupt Endothelial Cells Protect Blood Cancer Cells from ChemotherapyOctober 19, 2022
Endothelial cells—the cells that line blood vessels—grown alongside leukemia cells become corrupted and rescue the cancer cells from many chemotherapy drugs, a study by Weill Cornell Medicine investigators found.
- Gene Duo Protects Blood Vessel HealthOctober 6, 2022
Two genes working in concert sustain the integrity of healthy blood vessels, Weill Cornell Medicine investigators discovered in new research.
- Three Weill Cornell Medicine Faculty Inducted into Association of American PhysiciansApril 11, 2022
Three distinguished Weill Cornell Medicine physician-scientists, Dr. Joseph J. Fins, Dr. Rainu Kaushal and Dr. Shahin Rafii, have been elected to the esteemed Association of American Physicians (AAP).
- Specialized Liver Blood Vessel Identity Factor Required for RegenerationMarch 31, 2022
Researchers at Weill Cornell Medicine have identified a key protein that induces the program to build specialized liver blood vessels. The discovery could lead to engineered replacement hepatic tissue to treat common liver diseases.
- Hartman Family’s Gift to Create Research Institute for Organ Regeneration and RepairMarch 23, 2022
With a generous gift of $10 million from Board of Fellows member Alan Hartman and his wife, Kim, Weill Cornell Medicine will establish a multidisciplinary research institute to advance organ regeneration and repair.
- Researchers Identify Key Regulator of Blood Stem Cell DevelopmentJanuary 28, 2022
A protein that masterminds the way DNA is wrapped within chromosomes has a major role in the healthy functioning of blood stem cells, which produce all blood cells in the body, according to a new study from researchers at Weill Cornell Medicine.
- Researchers Awarded Grant to Study New Method of Islet TransplantationJanuary 5, 2022
Weill Cornell Medicine researchers have received a two-year $500,000 grant from JDRF to evaluate an innovative approach to islet cell transplantation, an experimental treatment for difficult-to-control type 1 diabetes. The research will be conducted in mouse models of this disease.
- Serendipity Opens New Path Toward Osteoporosis TreatmentSeptember 1, 2021
A cellular protein whose normal function appears to suppress bone formation may be a potential new target for treating osteoporosis, suggests a collaborative study led by Weill Cornell Medicine and NewYork-Presbyterian investigators.
- Treatment with Blood Vessel-Lining Endothelial Cells Reverses Emphysema in Preclinical ModelJuly 21, 2021
The specialized endothelial cells that line the blood vessels in the lung may hold the key to treating the common and often-fatal lung disease emphysema, according to a study from researchers at Weill Cornell Medicine and NewYork-Presbyterian.
- Weill Cornell Medicine Scientist Wins NIH Outstanding Investigator AwardNovember 4, 2020
Dr. Shahin Rafii, director of the Ansary Stem Cell Institute and chief of the Division of Regenerative Medicine at Weill Cornell Medicine, has received an Outstanding Investigator Award (R35) from the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health (NIH), for an ambitious project to accelerate regenerative medicine technology.
- Scientists Engineer Customized Blood Vessels to Support Organ Regeneration and Identification of Cancer TreatmentsSeptember 9, 2020
A team led by Weill Cornell Medicine scientists has pioneered a method for manufacturing functioning human blood vessels and demonstrated that they can carry blood in lab-grown model organs and tumors.
- Researchers Identify Genetic Program that Leads to the Development of Blood Vessels in the KidneyJanuary 24, 2020
Molecules that coordinate the development of highly specialized blood vessels in the kidney have been identified by investigators at Weill Cornell Medicine, University of Texas Southwestern Medical Center and Hofstra University. The findings pave the way toward new strategies for repairing damaged organs.
Mentoring
MD · 1
- CUCaitlin UnkenholzMD mentee · Class of 2026
PhD · 4
- JGJose Gabriel Barcia DuranPhysiology, Biophysics & Systems Biology (PhD) · Class of 2019
- PGPeipei GuoPhysiology, Biophysics & Systems Biology (PhD) · Class of 2016
- BKBalvir KunarPhysiology, Biophysics & Systems Biology (PhD)
- YKYosip KelemenCell & Developmental Biology (PhD)
Postdoc · 6
- LELy-sha EePostdoc mentee · 2021–2025
- WWWilliam WangPostdoc mentee · 2022–2022
- DBDavid BarryPostdoc mentee · 2018–2018
- WSWilliam SchachterlePostdoc mentee · 2017–2017