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INDIVIDUAL RESEARCHER

David Jourd'heuil , Ph.D.
Professor
e-mail: jourdhd@mail.amc.edu


Education

1996 - Ph.D. from Dept of Physiology, University of Calgary, Canada


Current Research

Current Research

The research in my laboratory is dedicated to a better understanding of the mechanisms of injury and adaptation in the vasculature, focusing on mechanisms related to oxidative stress and nitric oxide metabolomics.

Oxidants that are derived from oxygen regulate cardiovascular function and increase oxidative stress within the vasculature is as an important contributor to cardiovascular disease.   Although the mechanisms relating oxidative stress to vascular disease are yet to be fully understood, these include promotion of vascular inflammation and remodeling as well as inactivation of nitric oxide (NO).   Nitric oxide is a small gaseous signaling molecule that regulates many aspects of cardiovascular physiology and disease including blood pressure and inflammation.

Within this area, special attention is directed towards hemoproteins as important modulators of oxidative stress and NO bioavailability.  We have focused our attention on cytoglobin (CYGB), a member of the globin vertebrate family with poor functional annotation.  We have characterized CYGB in intact vessels and vascular smooth muscle cells as an adaptive response that may confer protection against injury in the vasculature.  Mechanisms through which the cytoprotective effect of CYGB may arise (for example vasodilatory, anti-apoptotic, and anti-inflammatory actions) are explored and the involvement of NO and oxidant scavenging capacity in contributing to such cytoprotection is examined..

Our laboratory pursues the theme of injury and adaptation in the context of mechanisms that contribute to arteriovenous fistula failure in end-stage renal disease.  We use - among other things - approaches based on transgenic models of arteriovenous fistula failure and human tissues from control and disease settings from which primary cell cultures might be derived and studied.  These studies are part of collaborative efforts between the Center for Cardiovascular Sciences and the Nephrology Group at AMC.

Finally, our laboratory collaborates with other initiatives at AMC and in the Greater Capital Region that explore oxidants and NO physiology and pathophysiology in the context of stroke, cancer, and asthma.  We provide expertise in nitric oxide metabolomics to assist our collaborators and other investigators in determining changes in the nitric oxide pathway.

 

Techniques from chemistry to vascular physiology are being used:

- Free radical biochemistry: spectroscopic, chemiluminescence, and electrochemical methods and kinetic studies for the determination of reactive oxygen and nitrogen species.

- Molecular biology: cloning, mutagenesis, adenoviral and lentiviral expression systems.

- Cell biology: mammalian transfection, dual-emission fluorescence microscopy, laser scanning confocal fluorescence microscopy.

- Physiology: vasoreactivity studies of small and large arteries; animal models of vascular injuries and cardiovascular disease.

 



Research Interests

Research Interests



PubMed Publications

  1. 1. Halligan KE, Jourd’heuil FL, and Jourd’heuil D. Cytoglobin is expressed in the vasculature and regulates cell respiration and proliferation via nitric oxide dioxygenation. J. Biol. Chem. 284(13):8539-8547, 2009.


  2. Pasha MA, Smith T, and Feustel P, and Jourd’heuil D. Effects of low dose Fluticasone/Salmeterol combination (Advair 100/50) on surrogate inflammatory markers in mild persistent asthma. J. Asthma. 50(1):64-70, 2013.


  3. Ginnan R, Guikema B, Jourd’heuil FL, Simons M, Singer HA, and Jourd’heuil D. NADPH Oxidase 4 is required for interleukin-1?-mediated activation of protein kinase C? and downstream activation of c-Jun N-terminal kinase in smooth muscle. Free Rad. Biol. Med. 54:125-34, 2013.


  4. Viles, K, Mathai, C, Jourd’heuil FL, and Jourd’heuil D. Xanthine Oxidase-Mediated Denitrosation of N-nitrosotryptophan. Nitric Oxide: Biology and Chemistry. 28:57-64, 2013.


  5. Dohare P, Vipani A, Hyzinski-García MC, Bowens NH, Nalwalk JW, Feustel PJ, Keller Jr. RW, Jourd’heuil D, and Mongin AA. The neuroprotective properties of the superoxide dismutase mimetic tempol correlate with its ability to reduce pathological glutamate release in a rodent model of stroke. Free Rad. Biol. Med. 2014 Sep 16. pii: S0891-5849(14)00421-3. doi: 10.1016/j.freeradbiomed.2014.08.029. [Epub ahead of print].