دورية أكاديمية
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Selective nitrergic neurodegeneration in diabetes mellitus - a nitric oxide-dependent phenomenon.

التفاصيل البيبلوغرافية
العنوان: Selective nitrergic neurodegeneration in diabetes mellitus - a nitric oxide-dependent phenomenon.
المؤلفون: Cellek S; The Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6AU, UK., Rodrigo J, Lobos E, Fernández P, Serrano J, Moncada S
المصدر: British journal of pharmacology [Br J Pharmacol] 1999 Dec; Vol. 128 (8), pp. 1804-12.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Wiley Country of Publication: England NLM ID: 7502536 Publication Model: Print Cited Medium: Print ISSN: 0007-1188 (Print) Linking ISSN: 00071188 NLM ISO Abbreviation: Br J Pharmacol Subsets: MEDLINE
أسماء مطبوعة: Publication: London : Wiley
Original Publication: London, Macmillian Journals Ltd.
مواضيع طبية MeSH: Diabetes Mellitus, Experimental/*metabolism , Erectile Dysfunction/*metabolism , Nerve Degeneration/*metabolism , Nitric Oxide Synthase/*metabolism , Penile Erection/*physiology , Penis/*metabolism, Animals ; Diabetes Mellitus, Experimental/complications ; Enzyme Inhibitors/pharmacology ; Erectile Dysfunction/etiology ; Male ; NG-Nitroarginine Methyl Ester/pharmacology ; Nerve Degeneration/etiology ; Nitric Oxide Synthase/drug effects ; Nitric Oxide Synthase Type I ; Nitric Oxide Synthase Type III ; Penile Erection/drug effects ; Penis/drug effects ; Rats ; Rats, Wistar
مستخلص: 1. In vitro and in vivo studies have demonstrated a dysfunctional nitrergic system in diabetes mellitus, thus explaining the origin of diabetic impotence. However, the mechanism of this nitrergic defect is not understood. 2. In the penises of streptozotocin (STZ)-induced diabetic rats, here, we show by immunohistochemistry that nitrergic nerves undergo selective degeneration since the noradrenergic nerves which have an anti-erectile function in the penis remained intact. 3. Nitrergic relaxation responses in vitro and erectile responses to cavernous nerve stimulation in vivo were attenuated in these animals, whereas noradrenergic responses were enhanced. 4. Activity and protein amount of neuronal nitric oxide synthase (nNOS) were also reduced in the penile tissue of diabetic rats. 5. We, thus, hypothesized that NO in the nitrergic nerves may be involved in the nitrergic nerve damage, since only the nerves which contain neuronal NO synthase underwent degeneration. 6. We administered an inhibitor of NO synthase, N(G)-nitro-L-arginine methyl ester (L-NAME), in the drinking water of rats for up to 12 weeks following the establishment of diabetes with STZ. 7. Here we demonstrate that this compound protected the nitrergic nerves from morphological and functional impairment. Our results show that selective nitrergic degeneration in diabetes is NO-dependent and suggest that inhibition of NO synthase is neuroprotective in this condition.
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المشرفين على المادة: 0 (Enzyme Inhibitors)
EC 1.14.13.39 (Nitric Oxide Synthase)
EC 1.14.13.39 (Nitric Oxide Synthase Type I)
EC 1.14.13.39 (Nitric Oxide Synthase Type III)
EC 1.14.13.39 (Nos1 protein, rat)
EC 1.14.13.39 (Nos3 protein, rat)
V55S2QJN2X (NG-Nitroarginine Methyl Ester)
تواريخ الأحداث: Date Created: 19991210 Date Completed: 20000302 Latest Revision: 20240412
رمز التحديث: 20240412
مُعرف محوري في PubMed: PMC1571816
DOI: 10.1038/sj.bjp.0702981
PMID: 10588937
قاعدة البيانات: MEDLINE
الوصف
تدمد:0007-1188
DOI:10.1038/sj.bjp.0702981