Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-24T14:06:10.819Z Has data issue: false hasContentIssue false
  • English
  • Français

Endothelial nitric oxide synthase polymorphism (G894T) and nonarteritic anterior ischemic optic neuropathy

Published online by Cambridge University Press:  15 November 2010

SOTIRIOS GIANNOPOULOS ,
SOFIA MARKOULA ,
IOANNIS ASPROUDIS ,
ANNA GALIDI ,
ALEXIOS NIKAS ,
ATHANASSIOS P. KYRITSIS  and
IOANNIS GEORGIOU
SOTIRIOS GIANNOPOULOS*
Affiliation:
Department of Neurology, University of Ioannina School of Medicine, Ioannina, Greece
SOFIA MARKOULA
Affiliation:
Department of Neurology, University of Ioannina School of Medicine, Ioannina, Greece
IOANNIS ASPROUDIS
Affiliation:
Department of Ophthalmology, University of Ioannina School of Medicine, Ioannina, Greece
ANNA GALIDI
Affiliation:
Laboratory of Medical Genetics, University Hospital of Ioannina, Ioannina, Greece
ALEXIOS NIKAS
Affiliation:
Department of Ophthalmology, University of Ioannina School of Medicine, Ioannina, Greece
ATHANASSIOS P. KYRITSIS
Affiliation:
Department of Neurology, University of Ioannina School of Medicine, Ioannina, Greece
IOANNIS GEORGIOU
Affiliation:
Laboratory of Medical Genetics, University Hospital of Ioannina, Ioannina, Greece
*
*Address correspondence and reprint requests to: Sotirios Giannopoulos, Department of Neurology, University of Ioannina School of Medicine, University Campus, 45110, Ioannina, Greece. E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Nonarteritic anterior ischemic optic neuropathy (NAION) is associated with vascular risk factors and a genetic predisposition for NAION. In this study, we examined the potential association of endothelial nitric oxide synthase (eNOS) G894T polymorphism with NAION. For this, 45 patients (29 men and 16 women) and 193 controls (122 men and 71 women) were enrolled prospectively and genotyped for eNOS genes. Genotypes were determined by polymerase chain reaction and restriction enzyme analysis. The prevalence of eNOS polymorphisms was estimated in NAION patients and controls. Genotype frequencies were estimated with chi-square test, and odds ratios were calculated. We found that eNOS G894T polymorphism is not associated with NAION occurrence as the genotype and allele frequencies were not significantly different between the control and patient groups (TT vs. GG + GT: P = 0.646 and T vs. G: P = 0.86). The precise mechanism of NAION occurrence has not been elucidated yet; since NAION may occur when a compromised watershed microcirculation is combined with insufficient autoregulation of systematic circulation, other alterations in the eNOS gene or polymorphism of genes involved in systematic circulation may be associated with NAION occurrence.

Keywords

Nitric oxidePolymorphismsGenesNonarteritic anterior ischemic optic neuropathy
Type
Brief Communication
Information
Visual Neuroscience , Volume 27 , Issue 5-6 , November 2010 , pp. 183 - 185
Copyright
Copyright © Cambridge University Press 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Arnold, A.C. (2003). Pathogenesis of nonarteritic anterior ischemic optic neuropathy. Journal of Neuro-Ophthalmology 23, 157–163.CrossRefGoogle ScholarPubMed
Casas, J.P., Bautista, L.E., Humphries, S.E. & Hingorani, A.D. (2004). Endothelial nitric oxide synthase genotype and ischemic heart disease: Meta-analysis of 26 studies involving 23028 subjects. Circulation 109, 1359–1365.CrossRefGoogle ScholarPubMed
Hayreh, S.S. (2001). Risk factors in AION. Ophthalmology 108, 1717–1718.CrossRefGoogle ScholarPubMed
Hayreh, S.S. (2009). Ischemic optic neuropathy. Progress in Retinal and Eye Research 28, 34–62.CrossRefGoogle ScholarPubMed
Laties, A.M. (2009). Vision disorders and phosphodiesterase type 5 inhibitors: A review of the evidence to date. Drug Safety 32, 1–18.CrossRefGoogle ScholarPubMed
Muzaffar, S., Shukla, N., Bond, M., Sala-Newby, G.B., Newby, A.C., Angelini, G.D. & Jeremy, J.Y. (2008). Superoxide from NADPH oxidase upregulates type 5 phosphodiesterase in human vascular smooth muscle cells: Inhibition with iloprost and NONOate. British Journal of Pharmacology 155, 847–856.CrossRefGoogle ScholarPubMed
Salomon, O., Dardik, R., Steinberg, D.M., Kurtz, S., Rosenberg, N., Moisseiev, J. & Huna-Baron, R. (2000). The role of angiotensin converting enzyme and angiotensin II type 1 receptor gene polymorphisms in patients with nonarteritic anterior ischemic optic neuropathy. Ophthalmology 107, 1717–1720.CrossRefGoogle ScholarPubMed
Salomon, O., Huna-Baron, R., Kurtz, S., Steinberg, D.M., Moisseiev, J., Rosenberg, N., Yassur, I., Vidne, O., Zivelin, A., Gitel, S., Davidson, J., Ravid, B. & Seligsohn, U. (1999). Analysis of prothrombotic and vascular risk factors in patients with nonarteritic anterior ischemic optic neuropathy. Ophthalmology 106, 739–742.CrossRefGoogle ScholarPubMed
Salomon, O., Rosenberg, N., Steinberg, D.M., Huna-Baron, R., Moisseiev, J., Dardik, R., Goldan, O., Kurtz, S., Ifrah, A. & Seligsohn, U. (2004). Nonarteritic anterior ischemic optic neuropathy is associated with a specific platelet polymorphism located on the glycoprotein Ibalpha gene. Ophthalmology 111, 184–188.CrossRefGoogle ScholarPubMed
Szolnoki, Z., Havasi, V., Bene, J., Komlosi, K., Szoke, D., Somogyvari, F., Kondacs, A., Szabo, M., Fodor, L., Bodor, A., Gati, I., Wittman, I. & Melegh, B. (2005). Endothelial nitric oxide synthase gene interactions and the risk of ischaemic stroke. Acta Neurologica Scandinavica 111, 29–33.CrossRefGoogle ScholarPubMed
Thurtell, M.J. & Tomsak, R.L. (2008). Nonarteritic anterior ischemic optic neuropathy with PDE-5 inhibitors for erectile dysfunction. International Journal of Impotence Research 20, 537–543.CrossRefGoogle ScholarPubMed
Zhou, L. & Zhu, D.Y. (2009). Neuronal nitric oxide synthase: Structure, subcellular localization, regulation, and clinical implications. Nitric Oxide 20, 223–230.CrossRefGoogle ScholarPubMed