Jon W Lomasney

  • 5339 Citations
1985 …2020
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Personal profile

Research Interests

Autopsy pathology, Cardiac pathology

Lipids are important regulators of the activity of many proteins including those involved in cardiac, vascular, pulmonary, and neural regulation, yet little is known about the molecular mechanisms mediating these effects. My laboratory staff members are engaged in a program of basic research to elucidate the molecular mechanisms by which lipids act as specific ligands to regulate cellular responses, and to investigate in select areas of cardiovascular disease how aberrations of signaling pathways may play a vital role in the pathogenesis of human disease. We have used the family of phosphoinositide-specific phospholipase C isoforms as a model to study protein-lipid interactions. Upon stimulation by various hormones these membrane associated enzymes hydrolyze polyphosphoinositides to yield second messengers such diacylglycerol and inositol 1,4,5-trisphosphate. The determinants of enzyme function are complex and can be broken down into several primary components: substrate binding and catalysis, enzyme translocation, and regulation. During the past several years we have identified the structural motifs in the PLC delta 1 isoform that mediate each of the three primary functions. All three motifs require the binding of a specific lipid for function. The structural motif mediating translocation also modulates the rate catalysis, and is encoded by a unique domain termed the pleckstrin homology or PH domain. This newly discovered protein module of 100 amino acids exists in many molecules (including PLC d1) that participate in signal transduction. Our research is among the first to demonstrate a clear function in signal transduction for the PH domain, and serves a paradigm for the activation and regulation of many signaling molecules.

Certifications and Licenses

Anatomic Pathology

Training Experience

1991Fellowship, Duke University Medical Center
1992Residency, Duke University Medical Center

Education/Academic qualification

MD, Dartmouth Medical School

… → 1987

Research interests

  • Biochemistry: Lipids
  • Cardiovascular Diseases
  • Molecular Pharmacology
  • Signal Transduction
  • Vascular Biology

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Grants 2002 2020

Cardiac Electrophysiologic Techniques
Atrial Fibrillation
Recurrence
Heart Atria
Pulmonary Veins
Wounds and Injuries
Acute Coronary Syndrome
Benchmarking
Myocardial Reperfusion
Cardiovascular System
Malaria
Anemia
Parasites
Erythrocytes
Infection
Malaria
Anemia
Parasites
Erythrocytes
Infection

Research Output 1985 2019

Open Access
Proto-Oncogene Proteins c-akt
Fibronectins
Protein Kinase C
Glucose
11 Citations (Scopus)

Constitutive expression of a dominant-negative TGF-β type II receptor in the posterior left atrium leads to beneficial remodeling of atrial fibrillation substrate

Kunamalla, A., Ng, J., Parini, V., Yoo, S., Mcgee, K. A., Tomson, T. T., Gordon, D., Thorp, E. B., Lomasney, J. W., Zhang, Q., Shah, S. J., Browne, S., Knight, B. P., Passman, R. S., Goldberger, J. J., Aistrup, G. & Arora, R. K., Jun 24 2016, In : Circulation research. 119, 1, p. 69-82 14 p.

Research output: Contribution to journalArticle

Growth Factor Receptors
Transforming Growth Factors
Heart Atria
Atrial Fibrillation
Cardiac Electrophysiologic Techniques
3 Citations (Scopus)

Fulminant capillary leak syndrome in a patient with systemic sclerosis treated with imatinib mesylate

Hinchcliff, M. E., Lomasney, J. W., Johnson, J. A. & Varga, J., Oct 1 2016, In : Rheumatology (United Kingdom). 55, 10, p. 1916-1918 3 p.

Research output: Contribution to journalLetter

6 Citations (Scopus)
Diastole
Systole
Left Ventricular Function
Healthy Volunteers
Electrocardiography
9 Citations (Scopus)

Cardiomyocytes induce macrophage receptor shedding to suppress phagocytosis

Zhang, S., Yeap, X. Y., Grigoryeva, L., Dehn, S., DeBerge, M., Tye, M., Rostlund, E., Schrijvers, D., Zhang, Z. J., Sumagin, R., Tourtellotte, W. G., Lee, D., Lomasney, J., Morrow, J. & Thorp, E. B., Oct 1 2015, In : Journal of Molecular and Cellular Cardiology. 87, p. 171-179 9 p.

Research output: Contribution to journalArticle

Phagocytosis
Cardiac Myocytes
Muscle Cells
Macrophages
Protein-Tyrosine Kinases