George J. Broze, Jr., M.D.

George Broze
  • Professor
    • Department of Medicine
      • Hematology Division
    • Department of Cell Biology & Physiology
    • Department of Pathology & Immunology
  • Clinical interests
    • General hematology
  • Research interests
    • Regulation of coagulation
    • Hemostasis

Research

The goal of our research is an understanding of the initiation and control of hemostasis and the interrelationship between coagulation and inflammation. Rather than hemorrhagic phenomena, the investigative thrust concerns pathologic thrombosis and atherosclerosis.

Our investigations recently have centered on a novel endogenous coagulation inhibitor that circulates bound to plasma lipoproteins that we have isolated, cloned, expressed and characterized called Tissue Factor Pathway Inhibitor (TFPI). TFPI is a multivalent Kunitz-type proteinase inhibitor that directly inactivates coagulation factor Xa and produces feedback inhibition of the factor Vlla/tissue factor catalytic complex that is responsible for the initiation of coagulation. Additional work involves studies of a previously unrecognized pathway for coagulation factor XI activation and the characterization of a previously undetected regulator of coagulation we have termed the protein Z-dependent protein inhibitor. The aim of current studies is to define through both in vitro and in vivo experiments the role of coagulation in the inflammatory response and vascular diseases.

Work in the laboratory involves protein purification and characterization kinetics of proteinase/inhibitor interactions, production of monoclonal and polyclonal antibodies for the development of in vitro immunoassays and histochemical studies, expression and characterization of native and mutant recombinant proteins for structure/function studies, and the assessment of particular interventions in animal models using transgenic and gene deletion techniques.

TFPI

Tissue factor pathway inhibitor (TFPI) inhibition of FVIIa/TF

Two pathways for the factor (F)FXa-dependent inhibition of FVIIa/TF by TFPI are shown. On the right, soluble FXa generated by the FVIIa/TF catalytic complex is bound and inhibited by TFPI and then the FXa/TFPI complex binds FVIIa-TF forming a final quaternary FVIIa/TF-TFPI-FXa inhibitory complex. On the left, TFPI binds to a tertiary complex containing FVIIa/TF and FXa that has not yet dissociated from FVIIa/TF following its activation. Kinetic studies strongly suggest that the physiological effect of TFPI is predominantly mediated through this latter pathway.

From: Broze GJ Jr
The rediscovery and isolation of TFPI.
J Thromb Haemost 2003 Aug;1(8):1671-5

Biographical Sketch

Education

1968 BS Physics (Magna Cum Laude), University of Washington, Seattle, WA
1972 MD, University of Washington School of Medicine, Seattle, WA

Post-graduate Training

1972-1973 Intern in Medicine-Pediatrics, North Carolina Memorial Hospital, Chapel Hill, NC
1973-1974 Junior Assistant Resident in Pediatrics, North Carolina Memorial Hospital, Chapel Hill, NC
1974-1975 Junior Assistant Resident in Medicine, North Carolina Memorial Hospital, Chapel Hill, NC
1975-1976 Senior Assistant Resident in Medicine, North Carolina Memorial Hospital, Chapel Hill, NC
1976-1977 Clinical Fellow, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, MO
1977-1979 Research Fellow, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, MO

Academic Positions

1979-1980 Instructor of Medicine, Washington University School of Medicine, St. Louis, MO
1980-1987 Assistant Professor of Medicine, Washington University School of Medicine, St. Louis, MO
1987-1991 Associate Professor of Medicine, Washington University School of Medicine, St. Louis, MO
1991-present Professor of Medicine, Washington University School of Medicine, St. Louis, MO
1992-present Professor of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO
2005-present Professor of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO

Appointments

1980-1990 Director, Transfusion Unit/Medicine Clinical Practice, Jewish Hospital, St. Louis, MO
1980-1988 Transfusion Review Committee, Jewish Hospital, St. Louis, MO
1986-1987 Transfusion Review Committee, Chairman Pro Tem, Jewish Hospital, St. Louis, MO
1988-1993 Human Studies Committee, Jewish Hospital, St. Louis, MO
1992-1999 Co-Coursemaster, Markey Special Emphasis Pathway in Human Pathobiology

Board Certification

  Internal Medicine

Professional Societies

  Association of American Physicians
  American Society for Clinical Investigation
  American Society of Biological Chemists
  American Society of Hematology
   Subcommittee on Thrombosis, 1991-1997
      Chairman, 1992-1993, 1996-1997
   Nominating Committee, 1999-2002
      Chairman, 2000
   Scientific Program Committee, 2000-2002
      Co-Chairman, 2001
  American Heart Association: Thrombosis Council
   Program Committee, 1988-1991
   Executive Council, 1991-1994
   Established Investigator Grant Review Committee, 1995-1998
  International Society on Thrombosis and Haemostasis
   TFPI Subcommittee, Chairman, 1991-1993
   Lectures/Awards Subcommittee, 2002-2005
   Executive Council, 2002-2008
   Publications Subcommittee, Chairman, 2003-present
   Editor-in-Chief Search Committee, Chairman, 2005-2006
  National Heart, Lung and Blood Institute
   Hematology Study Section-1, 2001-2003

Editorial Boards

1989-2008 Blood
   Editorial Board, 1989-1994
   Associate editor, 2003-2008
1990-1995 Arteriosclerosis and Thrombosis
1991-present Current Opinion in Hematology, Hemostasis-Thrombosis Section Co-editor
1992-1996 Journal of Biological Chemistry

Honors & Awards

  Phi Beta Kappa
1979-1984 Clinical Scientist Award, American Heart Association
1991 Distinguished Investigator, International Society on Thrombosis and Haemostasis
1994 William Dameshek Prize, American Society of Hematology
1996 Sol Sherry Lecturer, American Heart Association
1995-present Best Doctors/Top Docs in America
1996-present Best Doctors/Top Docs in the Midwest
1999 Distinguished Career Award, International Society on Thrombosis and Haemostasis
2001 Pia Glas-Greenwalt Lecture, International Society on Thrombosis and Haemostasis

Updated: April 23, 2008

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