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Steven A Fisher

Steven A Fisher M.D.

Academic Title: Professor
Primary Appointment: Medicine
Secondary Appointments: Physiology
Location: HSF II, S-012c
Phone: (410) 706-4534
Fax: (410) 706-4801

Personal History:


1978: B.A., Central High School of Philadelphia
1982: B.A., University of Pennsylvania
1986: M.D., University of Pennsylvania


1986-1989: Internal Medicine Residen, University of Pittsburgh Presbyterian University Hospital
1989-1993: Cardiology Fellow, Medical Center Hospital and University of Vermont


Internal Medicine - 1991
Cardiovascular Medicine -1993; re-certified 2004


1993-2011: Case Western Reserve University
2011-present: University of Maryland School of Medicine

Research Interests:


1) Vascular smooth muscle adaptations to altered blood flow with a focus on myosin phosphatase (MP). The working model is that alterantive splicing of MP under the control of Transformer proteins sets the sensitivity of VSM to signals that regulate blood flow, e.g. NO/cGMP.

2) Tissue hypoxia and heart morphogenesis. We have identified tissue oxygen gradients in the developing heart and proposed that these a) are required for apoptosis-dependent remodeling and patterning of the cardiac outlet structures b) pre-dispose to congenital heart defects.

Clinical Speciality:

General Cardiology

Lab Techniques and Equipment:

Mouse models: conditional gene knock-out, creation of new knock-out models. Surgical models: arterial ligations, hypoxic stress Molecular biology: PCR, real-time PCR, Western blot, IHC, plasmid cloning, sub-cloning and mutagenesis, RNA-protein binding assays, arrays, IP etc.

Bioinformatic analyses

Physiology: vessel contractility in wire myograph; ECHO for cardiac structure and blood flow

Grants & Contracts:

2/10-1/14: Steven A Fisher, Smooth muscle myosin phosphatase subunit isoforms, NIH/NHLBI R01 HL66171

7/10-6/14: P.I. Steven A Fisher, Tissue hypoxia in cardiac morphogenesis, NIH/NHLBI R01 HL65314


Fu F, Mende Y, Wirth B and Fisher SA. Tra2b is required for tissue-specific splicing of a myosin phosphatase targeting subunit alternative exon in mouse fast smooth muscle tissues, 2012 May 11;287(20):16575-85.  PMCID: PMC3351297

Fisher SA, Vascular smooth muscle phenotypic diversity and function, Physiol Genomics, 2010:42A: 169-187 PMCID: PMC3008361

Liu HL and Fisher SA. Hypoxia-inducible transcription factor-1a triggers an autocrine survival pathway during embryonic cardiac outflow tract remodeling, Circ Res, 2008;102(11):1331-9. PMCID: PMC2737478.

Fisher S and Burggren W. Role of hypoxia in the development and evolution of the cardiovascular system, Anti-oxidants and Redox Signaling, 2007,9:152-159. PMID: 17627471

Zhang HY and Fisher SA. Conditioning effect of blood flow on resistance artery smooth muscle myosin phosphatase, Circ Res, 2007,100:730-737. PMID: 17293476.

Sugishita Y, Leifer D, Agani F, Watanabe M, Fisher S. Hypoxia-responsive signaling regulates the apoptosis-dependent remodeling of the embryonic avian cardiac outflow tract, Dev Biol, 2004, 273:285-296. PMID: 15328013

Khatri JK, Joyce KM, Brozovich FV and Fisher S. Role of myosin phosphatase isoforms in cGMP-mediated smooth muscle relaxation. J of Biol Chem 276, 37250-37257, 2001. PMID: 11486008.