John Hwa, MD, PhD, FRACP
Professor of Medicine (Cardiology)Cards
Appointments
Additional Titles
Co-Director Yale Cooperative Center of Excellence in Hematology, Cardiovascular Medicine
Contact Info
Cardiovascular Medicine
PO Box 208017
New Haven, CT 06520-8017
United States
Appointments
Additional Titles
Co-Director Yale Cooperative Center of Excellence in Hematology, Cardiovascular Medicine
Contact Info
Cardiovascular Medicine
PO Box 208017
New Haven, CT 06520-8017
United States
Appointments
Additional Titles
Co-Director Yale Cooperative Center of Excellence in Hematology, Cardiovascular Medicine
Contact Info
Cardiovascular Medicine
PO Box 208017
New Haven, CT 06520-8017
United States
About
Titles
Professor of Medicine (Cardiology)
Co-Director Yale Cooperative Center of Excellence in Hematology, Cardiovascular Medicine
Biography
Dr. Hwa received his medical degree (First Class Honors) from the University of Sydney, Australia. He completed his Residency in Internal Medicine and Fellowship in Cardiology at the Royal Prince Alfred Hospital, Sydney, Australia. He then pursued further studies in the Department of Molecular Cardiology at the Cleveland Clinic Foundation during which time he completed his doctoral thesis through Case Western Reserve University. Dr. Hwa was then awarded a Howard Hughes Physician Postdoctoral Fellowship to continue studies at M.I.T in the laboratory of Nobel Laureate, H. Gobind Khorana. He joined the faculty At Dartmouth (Pharmacology and Toxicology and Medicine) in 2000, and moved to Yale (Section of Cardiovascular Medicine) in 2009.
Appointments
Cardiovascular Medicine
ProfessorPrimary
Other Departments & Organizations
- Cancer Immunology
- Cardiovascular Medicine
- Hwa Lab
- Internal Medicine
- Vascular Biology and Therapeutics Program
- Yale Cancer Center
- Yale Cardiovascular Research Center (YCVRC)
- Yale Ventures
- YCCEH
Education & Training
- Howard Hughes Physician Postdoctoral Fellow
- M.I.T. (2000)
- PhD
- Case Western Reserve Univ (1996)
- Research Fellow
- Cleveland Clinic Foundation (1996)
- Resident/Fellow
- Royal Prince Alfred Hospital, Sydney Australia (1992)
- MD
- University of Sydney (1986)
Research
Overview
The Hwa Laboratory research interests focuses on platelet metabolic reprogramming under stress conditions (e.g. hyperglycemia, oxidative stress) leading to thrombosis and critical intercellular communication with such cells as endothelial cells, vascular smooth muscle cells, and T-cells. Platelets play key roles in the regulation of vascular stress response, including hemostasis, immunoregulation, initiation of repair, and cessation of the repair process. Defective platelets thus contributes to vascular pathology including thromboinflammation, intimal hyperplasia, aneurysm formation, and immune dysregulation.
Our current studies can be broadly divided into the following major areas.
1) Platelet metabolic reprogramming in response to stress and aging
2) Platelet communication to other cells in health and disease
3) The Yale cardiovascular tissue repository collaborative effort
Medical Research Interests
- View Lab Website
The Hwa Lab
Research at a Glance
Yale Co-Authors
Publications Timeline
Research Interests
Tarun Tyagi, PhD
Kanika Jain, PhD
Jing Du, MD, PhD
Kathleen Martin, PhD
Sean Gu, MD/PhD
Timur Yarovinsky, MD, PhD
Blood Platelets
Diabetes Mellitus
Carcinoma, Non-Small-Cell Lung
Publications
Featured Publications
Fishing for “complements” with vascular organoid models of microvascular disease
Gu S, Yarovinsky T, Hwa J. Fishing for “complements” with vascular organoid models of microvascular disease. Cell Stem Cell 2023, 30: 1285-1286. PMID: 37802032, DOI: 10.1016/j.stem.2023.09.004.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsPlatelet-derived TLT-1 promotes tumor progression by suppressing CD8+ T cells
Tyagi T, Jain K, Yarovinsky TO, Chiorazzi M, Du J, Castro C, Griffin J, Korde A, Martin KA, Takyar SS, Flavell RA, Patel AA, Hwa J. Platelet-derived TLT-1 promotes tumor progression by suppressing CD8+ T cells. Journal Of Experimental Medicine 2022, 220: e20212218. PMID: 36305874, PMCID: PMC9814191, DOI: 10.1084/jem.20212218.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsCD8 T cellsT cellsTLT-1Non-small cell lung cancer patientsCell lung cancer patientsTREM-like transcript-1Tumor immunosuppressive mechanismsT cell suppressionLung cancer patientsPatient T cellsNF-κB pathwayPatient-derived tumorsDistinct activation phenotypesNSCLC patientsImmunosuppressive mechanismsSyngeneic tumorsHumanized miceImmunoregulatory rolePrognostic significanceImmunocompetent miceCancer patientsCell suppressionActivation phenotypeReduced tumorTumor growthUnfolded Protein Response Differentially Modulates the Platelet Phenotype
Jain K, Tyagi T, Du J, Hu X, Patell K, Martin KA, Hwa J. Unfolded Protein Response Differentially Modulates the Platelet Phenotype. Circulation Research 2022, 131: 290-307. PMID: 35862006, PMCID: PMC9357223, DOI: 10.1161/circresaha.121.320530.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsUPR pathwayProtein responseMouse plateletsUnfolded protein responseActivation of UPRPlatelet phenotypeTranscriptional regulationGenomic regulationProtein misfoldingAnucleate plateletsProtein aggregationUPR activationPhosphorylation of PLCγ2Chemical chaperonesXBP1 pathwayP38 MAPKPERK pathwayUPRPKCδ activationPlatelet physiologyActivation pathwayPathwayPhenotypeIRE1α inhibitionSelective inductionInsights into platelet pharmacology from a cryo-EM structure of the ABCC4 transporter
Sharda A, Gu S, Hwa J. Insights into platelet pharmacology from a cryo-EM structure of the ABCC4 transporter. Nature Cardiovascular Research 2023, 2: 606-608. PMID: 37655224, PMCID: PMC10470688, DOI: 10.1038/s44161-023-00293-z.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsCitationsAltmetricLipid remodeling in megakaryocyte differentiation and platelet biogenesis
Jain K, Tyagi T, Hwa J. Lipid remodeling in megakaryocyte differentiation and platelet biogenesis. Nature Cardiovascular Research 2023, 2: 803-804. PMID: 37736249, PMCID: PMC10512809, DOI: 10.1038/s44161-023-00324-9.Peer-Reviewed Original ResearchCitationsAltmetricA guide to molecular and functional investigations of platelets to bridge basic and clinical sciences
Tyagi T, Jain K, Gu S, Qiu M, Gu V, Melchinger H, Rinder H, Martin K, Gardiner E, Lee A, Tang W, Hwa J. A guide to molecular and functional investigations of platelets to bridge basic and clinical sciences. Nature Cardiovascular Research 2022, 1: 223-237. PMID: 37502132, PMCID: PMC10373053, DOI: 10.1038/s44161-022-00021-z.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsCitationsAltmetricConceptsVascular smooth muscle cellsPlatelet functional assaysCoronavirus disease 2019Smooth muscle cellsImmune cellsImmune regulationVascular remodelingDisease 2019Pathophysiological processesTranslational relevancePatient diagnosisFlow cytometryMuscle cellsPlatelet biologyFunctional assaysPlatelet investigationsHomeostatic processesPlateletsPhenotypic heterogeneityFunctional stateClinical scienceCellsAdditional roleThrombosisSuch diverse functionsThrombocytopathy and endotheliopathy: crucial contributors to COVID-19 thromboinflammation
Gu SX, Tyagi T, Jain K, Gu VW, Lee SH, Hwa JM, Kwan JM, Krause DS, Lee AI, Halene S, Martin KA, Chun HJ, Hwa J. Thrombocytopathy and endotheliopathy: crucial contributors to COVID-19 thromboinflammation. Nature Reviews Cardiology 2020, 18: 194-209. PMID: 33214651, PMCID: PMC7675396, DOI: 10.1038/s41569-020-00469-1.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsCitationsAltmetricMeSH Keywords and ConceptsMeSH KeywordsAdministration, InhalationAnticoagulantsBlood Coagulation DisordersBlood Platelet DisordersCOVID-19COVID-19 Drug TreatmentEndothelium, VascularEndothelium-Dependent Relaxing FactorsEpoprostenolHeart Disease Risk FactorsHumansIloprostInflammationNitric OxidePlatelet Aggregation InhibitorsSARS-CoV-2Systemic Inflammatory Response SyndromeThrombosisThrombotic MicroangiopathiesVascular DiseasesVasodilator AgentsVenous ThromboembolismConceptsCardiovascular risk factorsRisk factorsCOVID-19Severe acute respiratory syndrome coronavirus 2Pre-existing cardiovascular diseaseAcute respiratory syndrome coronavirus 2Traditional cardiovascular risk factorsAcute respiratory distress syndromeRespiratory syndrome coronavirus 2Respiratory distress syndromeManagement of patientsSyndrome coronavirus 2COVID-19 pathologyCoronavirus disease 2019Potential therapeutic strategyCytokine stormEndothelial dysfunctionThrombotic complicationsDistress syndromeExcessive inflammationCoronavirus 2Severe outcomesAdvanced ageCardiovascular diseaseDisease 2019SOD2 in platelets: with age comes responsibility
Jain K, Gu S, Hwa J. SOD2 in platelets: with age comes responsibility. Journal Of Thrombosis And Haemostasis 2023, 21: 1077-1081. PMID: 36716965, DOI: 10.1016/j.jtha.2023.01.016.Peer-Reviewed Original ResearchPlatelet Mitochondrial Fusion and Function in Vascular Integrity
Tyagi T, Yarovinsky T, Faustino E, Hwa J. Platelet Mitochondrial Fusion and Function in Vascular Integrity. Circulation Research 2024, 134: 162-164. PMID: 38236952, PMCID: PMC10798220, DOI: 10.1161/circresaha.123.323867.Peer-Reviewed Original ResearchAltmetric
2024
Clonal hematopoiesis of indeterminate potential is associated with increased risk of immune checkpoint inhibitor myocarditis in a prospective study of a cardio-oncology cohort
Jaber Chehayeb R, Singh J, Matute-Martinez C, Chen N, Guajardo A, Lin D, Jayakrishnan R, Christofides A, Leveille E, Im Y, Biancon G, VanOudenhove J, Ibrahim E, Ardasheva A, Jha A, Hwa J, Halene S, Kwan J. Clonal hematopoiesis of indeterminate potential is associated with increased risk of immune checkpoint inhibitor myocarditis in a prospective study of a cardio-oncology cohort. Cardio-Oncology 2024, 10: 84. PMID: 39587635, PMCID: PMC11590368, DOI: 10.1186/s40959-024-00289-z.Peer-Reviewed Original ResearchAltmetricConceptsImmune checkpoint inhibitor myocarditisImmune checkpoint inhibitorsImmune checkpoint inhibitor useICI-myocarditisIndeterminate potentialProspective studyImmune checkpoint inhibitor therapyCancer therapyClonal hematopoiesis of indeterminate potentialCancer treated with immunotherapyIncreased T cell activationObstructive coronary artery diseaseMultivariate competing risk analysisCardiotoxic cancer therapyRisks Cox regressionAssociated with increased riskIncreased all-cause mortalityPatient co-morbiditiesRisk of cardiomyopathyT cell activationCompeting risk analysisCoronary artery calcificationCoronary artery diseaseAll-cause mortalityHeart failure patients
Academic Achievements & Community Involvement
honor Plenary Lecture Vascular Discovery 2022
International AwardAmerican Heart AssociationDetails05/13/2022United Stateshonor Master of Arts (Privatim)
Yale University AwardYale UniversityDetails01/01/2018United Stateshonor Elected Member Interurban Clinical Club
National AwardInterurban Clinical Club (Founded by Sir William Osler 1905)Details01/01/2017United Stateshonor Recognition Award for Cardiovascular Research
National AwardAmerican Heart AssociationDetails01/01/2009United Stateshonor American Heart Association Established Investigator Award
National AwardAmerican Heart AssociationDetails01/01/2007United States
News & Links
Media
- Confocal and electron microscopy demonstrating whole platelet uptake by a vascular smooth muscle cell
- Coronary angiogram, DNA sequence, and structural homology data for an R212C patient
News
- September 30, 2024
Pepper Center Awards Drive Aging and Dementia Studies
- August 08, 2024Source: Everyday Health
Artificial Sweetener Erythritol (Truvia) May Raise Heart Attack Risk
- May 19, 2024Source: The Guardian
‘It was smart to marry the competition’: meet the ‘power couples’ who work together
- April 01, 2024
Yale Faculty Present Groundbreaking Clinical Research at the 2024 American College of Cardiology Scientific Sessions
Get In Touch
Contacts
Cardiovascular Medicine
PO Box 208017
New Haven, CT 06520-8017
United States
Locations
Cardiovascular Research Center
Lab
300 George Street, Ste 7th Floor
New Haven, CT 06511
Appointments
203.737.4641Cardiovascular Research Center
Academic Office
300 George Street, Ste 759H
New Haven, CT 06511
Appointments
203.737.5583Fax
203.737.6118