Novel Insights on the Role of Nitric Oxide in the Ovary: A Review of the Literature

Maria Cristina Budani and Gian Mario Tiboni
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Maria Cristina Budani: Department of Medicine and Aging Sciences, University “G. d’Annunzio” Chieti-Pescara, Via Dei Vestini 31, 66100 Chieti, Italy
Gian Mario Tiboni: Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, Via Dei Vestini 31, 66100 Chieti, Italy

IJERPH, 2021, vol. 18, issue 3, 1-17

Abstract: Nitric oxide (NO) is formed during the oxidation of L-arginine to L-citrulline by the action of multiple isoenzymes of NO synthase (NOS): neuronal NOS (nNOS), endotelial NOS (eNOS), and inducible NOS (iNOS). NO plays a relevant role in the vascular endothelium, in central and peripheral neurons, and in immunity and inflammatory systems. In addition, several authors showed a consistent contribution of NO to different aspects of the reproductive physiology. The aim of the present review is to analyse the published data on the role of NO within the ovary. It has been demonstrated that the multiple isoenzymes of NOS are expressed and localized in the ovary of different species. More to the point, a consistent role was ascribed to NO in the processes of steroidogenesis, folliculogenesis, and oocyte meiotic maturation in in vitro and in vivo studies using animal models. Unfortunately, there are few nitric oxide data for humans; there are preliminary data on the implication of nitric oxide for oocyte/embryo quality and in-vitro fertilization/embryo transfer (IVF/ET) parameters. NO plays a remarkable role in the ovary, but more investigation is needed, in particular in the context of human ovarian physiology.

Keywords: nitric oxide; folliculogenesis; steroidogenesis; meiotic maturation; in-vitro fertilization (IVF); embryo development (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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