Charles W. Leffler, Ph.D.
Department of Physiology
Department of Pediatrics
The University of Tennessee Health Science Center
309 Nash Research Building
894 Union Avenue
Memphis, TN 38163
Phone: (901) 448-7122;
Fax: (901) 448-7126
Email: Charles W. Leffler
- Ph.D. Institution: University of Florida, Department of Zoology
- Postdoctoral: University of Florida, Department of Physiology
Research in the laboratory concentrates on control of newborn cerebral circulation. A focus of this research is control of the newborn cerebral microvasculature during physiological and pathological situations, and the cellular mechanisms involved in such control. We investigate autocrine and paracrine communication within the neurovascular unit, with specific current focus on two novel, endogenously produced, gaseous transmitter molecules, carbon monoxide (CO) and hydrogen sulfide (H2S). This research is important because the single most prominent cause of mortality and morbidity in newborns is hypoxic-ischemic brain injury, which often leads to lifelong disability in survivors. The neonatal brain is more susceptible to injury from insufficient or inappropriate blood flow for metabolism than that of the adult because of rapid development and proliferation of neurons and vessels, and high susceptibility to inflammation. Successes in developing approaches to avert and treat perinatal hypoxia-ischemic brain damage have been limited by insufficient understanding of the mechanisms that control perinatal cerebral circulation. The gasotransmitters, CO and H2S, are mechanisms of which greater understanding is urgently needed.
- Chang J, Fedinec AL, Kuntamallappanavar G, Leffler CW, Bukiya AN, Dopico AM. Endothelial nitric oxide mediates caffeine antagonism of alcohol-induced cerebral artery constriction. J Pharmacol Exp Ther. 2015 Nov 10. pii: jpet.115.229054. [Epub ahead of print] PubMed PMID: 26555891.
- Pourcyrous M, Basuroy S, Tcheranova D, Arheart KL, Elabiad MT, Leffler CW, Parfenova H. Brain-derived circulating endothelial cells in peripheral blood of newborn infants with seizures: a potential biomarker for cerebrovascular injury. Physiol Rep. 2015 Mar;3(3). pii: e12345. doi: 10.14814/phy2.12345. PubMed PMID: 25804265; PubMed Central PMCID: PMC4393173.
- Liu J, Fedinec AL, Leffler CW, Parfenova H. Enteral supplements of a carbon monoxide donor CORM-A1 protect against cerebrovascular dysfunction caused by neonatal seizures. J Cereb Blood Flow Metab. 2015 Feb;35(2):193-9. doi: 10.1038/jcbfm.2014.196. Epub 2014 Nov 5. PubMed PMID: 25370858; PubMed Central PMCID: PMC4426744.
- Nnorom CC, Davis C, Fedinec AL, Howell K, Jaggar JH, Parfenova H, Pourcyrous M, Leffler CW. Contributions of KATP and KCa channels to cerebral arteriolar dilation to hypercapnia in neonatal brain. Physiol Rep. 2014 Aug 28;2(8). pii: e12127. doi: 10.14814/phy2.12127. Print 2014 Aug 1. PubMed PMID: 25168876; PubMed Central PMCID: PMC4246596.
- Bukiya A, Dopico AM, Leffler CW, Fedinec A. Dietary cholesterol protects against alcohol-induced cerebral artery constriction. Alcohol Clin Exp Res. 2014 May;38(5):1216-26. doi: 10.1111/acer.12373. Epub 2014 Mar 3. PubMed PMID: 24588122; PubMed Central PMCID: PMC4010119.
- Basuroy S, Leffler CW, Parfenova H. CORM-A1 prevents blood-brain barrier dysfunction caused by ionotropic glutamate receptor-mediated endothelial oxidative stress and apoptosis. Am J Physiol Cell Physiol. 2013 Jun 1;304(11):C1105-15. doi: 10.1152/ajpcell.00023.2013. Epub 2013 Apr 10. PubMed PMID: 23576575; PubMed Central PMCID: PMC3677176.