Frontiers in Medicinal Chemistry

Volume: 2

Indexed in: Scopus, EMBASE, Chemical Abstracts, EBSCO, Ulrich's Periodicals Directory.

Frontiers in Medicinal Chemistry is a book series devoted to the review of areas of important topical interest to medicinal chemists and others in allied disciplines. Frontiers in Medicinal Chemistry ...
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Updating the Dual Role of Brain Nitric Oxide in Neurodegeneration/Neuroprotection: Understanding Molecular Mechanisms to Devise Drug Approaches

Pp. 63-109 (47)

Antonio Contestabile, Barbara Monti, Andrea Contestabile and Elisabetta Ciani

Abstract

Nitric oxide (NO) has been established as an important messenger molecule in various steps of brain physiology, from development to synaptic plasticity, learning and memory. However, NO has also been viewed as a major agent of neuropathology when, escaping controlled production it may directly or indirectly promote oxidative and nitrosative stress. The exact borderline between physiological, and therefore neuroprotective, and pathological, and therefore neurodegenerative, actions of NO is a matter of controversy among researchers in the field. This is reflected in the present status of drug research, that is focused on finding ways to block NO production, and therefore limit neuropathology, as well as on finding ways to increase NO availability and therefore elicit neuroprotection. As an unavoidable consequence, both classes of drugs are reported to have neurodegenerative or neuroprotective effects, depending on the models in which they are tested. Aim of the present paper is to provide the reader with a survey, as much complete as possible, on the main aspects of NO biology, from biochemistry and chemical reactivity to the molecular signals elicited in neural cells target of its neurodegenerative or neuroprotective action. In doing that, many controversial aspects related to basic biology and to neuropathology of NO are taken into account. In the final sections, main classes of drugs able to interfere with NO physiopathology are examined, in order to try to devise possible directions for future NO-based therapeutical strategies.

Keywords:

Nitric oxide synthases, nitric oxide chemical reactivity, nitric oxide-mediated cellular signals, neurodegeneration, neuroprotection and survival, nitric oxide synthase inhibitors, nitric oxide donors

Affiliation:

Department of Biology and Department of Human and General Physiology, University of Bologna, Via Selmi 3, 40126 Bologna, Italy.