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Faculty investigators

Louis Ragolia, PhD



Cancer & Cardiovascular


Faculty Investigators

Primary Address

222 Station Plaza North, Suite 505-B
Mineola, NY 11501
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Bio - Louis Ragolia, PhD

Dr. Ragolia received his Bachelor of Science in Biochemistry from Stony Brook University in 1985 and a Ph.D. in Biochemistry/Molecular Biology from Queens College of the City University of New York in 1994. He joined Winthrop in 1995 to study type 2 diabetes and insulin resistance as a Postdoctoral Research Associate. After five years, 17 publications, several book chapters and a grant from the American Heart Association, he was offered the position of Director of Cellular Biology in 2000. Over the next three years he received grants from the National Institutes of Health to study insulin’s effect on smooth muscle contraction; the American Heart Association to study the effects of prostaglandins on vascular smooth muscle cell proliferation, migration and apoptosis; and the American Diabetes Association to study the effects of prostaglandins in type 2 Diabetes, for which he was the recipient of the prestigious Thomas R. Lee Award. In 2003, he was appointed Director of the Vascular Biology Institute and asked to oversee all basic science research in the Department of Medicine. Since 2008, Dr. Ragolia has also assumed the title of Director of Applied Sciences Research at Winthrop where he manages the basic science interests in the Department of Obstetrics /Gynecology as well. Dr. Ragolia sits on several committees at Winthrop including the Institutional Animal Care and Use Committee and the Radiation Safety Committee and is the Winthrop representative at the Long Island Life Science Initiative and the Academy for Medical Development and Collaboration’ Core Director and Proteomics group. He has over 40 publications in highly respected peer-reviewed journals as well as several review articles and patents. Dr. Ragolia holds the academic title of Associate Professor from Stony Brook University School of Medicine.

Areas of Experience

Wound healing Neurology

Research Team Members

Jodi F. Evans, Ph.D.- Research Associate
Jinhee Lee, Ph.D.- Research Associate
Thomas Palaia, M.S.- Senior Lab Technician
Christopher E. Hall, B.S.- Lab Technician II


Selected Publications

Ragolia, L., Palaia, T., Hall, C.E., Klein, J. and Buyuk, A. (2010). ”Diminished Lipocalin-type Prostaglandin D2 Synthase Expression in Human Lung Tumors” Lung Cancer (in press).

Lee, J, Palaia, T, and Ragolia, L. (2009). “Impaired Insulin-Mediated Vasorelaxation in Diabetic Goto-Kakizaki Rats is caused by Impaired Akt Phosphorylation” Am J Physiol Cell Physiol. Feb;296(2):C327-38.

Evans, J, Lee, J, and Ragolia, L. (2009). “Ang-II-induced Ca2+ influx is mediated by the 1/4/5 subgroup of the transient receptor potential proteins in cultured aortic smooth muscle cells from diabetic Goto-Kakizaki rats” Mol Cell Endocrinol. 2009 Apr 10;302(1):49-57

Lee, J., Xia, S., and Ragolia, L. (2008). “Upregulation of AT2 receptor and iNOS impairs angiotensin II-induced contraction without endothelium influence in young normotensive diabetic rats” Am J Physiol Regul Integr Comp Physiol. Jul;295(1):R144-154.

Ragolia, L., Hall, C.E., and Palaia, T. (2008). “Lipocalin-type Prostaglandin D2 Synthase Stimulates Glucose Transport via Enhanced GLUT4 Translocation” Prostaglandins Other Lipid Mediat. (in press) PMID: 18619553.

Ragolia, L., Hall, C.E., and Palaia, T. (2007). “Post-translational Modification Regulates Prostaglandin D2 Synthase Apoptotic Activity: Characterization by Site-directed Mutagenesis Prostaglandins and Other Lipid Mediators” Prostaglandins Other Lipid Mediat. 83:25-32.

Chan, E.S.L., Zhang, H., Fernandez, P., Edelman, S.D., Pillinger, M.H., Ragolia, L., Palaia, T., Carsons, S.E., Reiss, A.B. (2007). Effect of COX Inhibition on Cholesterol Efflux Proteins and Atheromatous Foam Cell Transformation in THP-1 Human Macrophages: A Possible Mechanism for Increased Cardiovascular Risk. Arthritis Res. Ther. (2007); 9(1):R4.

Lee, J. and Ragolia, L. (2006). “AKT Phosphorylation Is Essential For Insulin-induced Relaxation of Rat Vascular Smooth Muscle Cells” Am. J. Physiol. Cell Physiol. 291(6):C1355-65.

Johnston DT, Gagos M, Raio N, Ragolia L, Shenouda D, Davis-Lorton MA, De Leon JR. (2006). “Alterations in serum neopterin correlate with thrombolysis in myocardial infarction risk scores in acute coronary syndromes” Coron. Artery Dis. 17(6):511-516.

Maulik, D., Evans, J. and Ragolia, L. (2006). “Fetal Growth Restriction: Pathogenic Mechanisms” Clin Obstet Gynecol. 49(2):219-227

Ragolia, L., Palaia, T., Hall, C.E., Maesaka, J.K., Eguchi, N., and Urade, Y. (2005). “Accelerated glucose intolerance, nephropathy and atherosclerosis in prostaglandin D2 synthase knockout mice.” J. Biol. Chem. 280(33):29946-55

Ragolia, L., Palaia T., Koutrouby, T.B., and Maesaka J.K. (2004). “Inhibition of Serum-induced Cell Cycle Progression and Migration of Vascular Smooth Muscle Cells by Prostaglandin D2 Synthase: Resistance in the Diabetic Goto-Kakizaki Rat Model” Am. J. Physiol Cell Physiol. 287: C1273 – 1281.

Fishbane, S., Ragolia, L., Palaia, P., Johnson, B., Elzein, H., and Maesaka, J.K. (2004) “Cytoprotection by darbepoetin/epoetin alfa in Pig Tubular and Mouse Mesangial Cells” Kidney Int’l. 65:452-458.

Ragolia, L., Palaia T., Paric E., and Maesaka J.K. (2003). “Prostaglandin D2 Synthase Inhibits the Exaggerated Growth Phenotype of Spontaneously Hypertensive Rat Vascular Smooth Muscle Cells” J. Biol. Chem., 278:(24), 22175-22181.

Moon, B., Duddy,N., Ragolia, L., and Begum, N. (2003). “Stimulation of Glycogen Synthesis by Heat Shock in Rat L6 Skeletal Muscle Cells: Regulatory Role of PP1-G Site-Specific Phosphorylations” Biochem. J. 371(Pt 3):857-866.

Ragolia, L. Palaia, T., Paric, E., and Maesaka, J.K. (2003). “Elevated Prostaglandin D2 Synthase Activity Contributes to PMA-induced Apoptosis in LLC-PK1 Cells Concomitant with Down-regulation of PI3-K” Am. J. Physiol. Cell Physiol 284: c119-c126.

Maesaka, J.K., Palaia, T., Fishbane S., and, Ragolia, L. (2002) “Contribution of Prostaglandin D2 Synthase to Progression of Renal Failure and Dialysis Dementia” Sem. Nephrol. 22(5):407-414.

Maesaka, J., Palaia, T., Frese L., Fishbane, S. and Ragolia, L. (2001). “Prostaglandin D2 Synthase Induces Apoptosis in Pig Kidney LLC-PK1 Cells” Kidney Int’l. 60(5):1692-1698.

Ragolia, L., Palaia, T., Frese L., Fishbane, S. and Maesaka, J.K. (2001). “Prostaglandin D2 Synthase Induces Apoptosis in PC12 Neuronal Cells” NeuroReport 12:1-6.

Begum, N., Sandu, O., and Ragolia, L. (2000). “Diabetes is Accompanied by Impaired Insulin-Mediated Myosin-Bound Phosphatase Activation and Vascular Smooth Muscle Cell Relaxation due to Defective Rho Kinase and Nos Signaling” Diabetes 49(12):2178-2189.

Begum, N., Duddy, N., Sandu, O., Rienzie, J. and Ragolia, L. (2000). “Regulation of Myosin-bound Protein Phosphatase by Insulin in Vascular Smooth Muscle Cells: Evaluation of the role of Rho Kinase and PI3-Kinase dependent signaling pathways” Mol. Endocrinol. 14: 1365-1376.

Ragolia, L., Zuo, Q., and Begum, N. (2000). “Inhibition of Myogenesis by Depletion of the Glycogen-associated Regulatory Subunit of Protein Phosphatase-1 in Rat Skeletal Muscle Cells” J. Biol. Chem. 275:26102-26108.

Begum, N. and Ragolia, L. (2000). “High Glucose and Insulin Inhibit Vascular Smooth Muscle Cell MKP-1 Expression by Blocking iNOS via p38 MAPK Activation” Am. J. Physiol. Cell Physiol. 278: C81- C91.


Ragolia, L. and Begum, N. 1998. “The Relationship between Insulin Signaling and Protein Phosphatase-1 Activation” Methods in Molecular Biology, Protein Phosphatases, Humana Press, 93:157-167.

Ragolia, L. and Begum, N. 1998. “Protein Phosphatase-1 and Insulin Action” Molecular and Cellular Biochemistry, Focused Issue on Insulin Action, Kluwer Academic Publishers,182: 49-58.

Proteins Involved in the Pathogenesis of Atherosclerosis. The Role of Prostaglandin D2 Synthase in Atherosclerosis. Louis Ragolia, Ph.D. “Proteins Involved in the Pathogenesis of Atherosclerosis”, Research Signpost, 2006. (ISBN 81-308-0130-2)

The Role of Prostaglandin D2 Synthase in Insulin Resistance, Inflammation and Atherosclerosis- A Link to the Metabolic Syndrome? Louis Ragolia, Ph.D. “Prostaglandin D2 Synthase: A Protein with a Multitude of Functions” Ragolia, Ed. Research Signpost, (2007). (ISBN 978-81-308-0186-5).

Lung Cancer and Preterm Birth

Grant Support
National Institutes of Health
American Diabetes Association
American Heart Association