Response of nitrergic system in the brain of rat conditioned to intracranial self-stimulation.

Autor: Choudhary AG; Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India., Awathale SN; Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India., Dudhabhate BB; Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India., Pawar N; Department of Biotechnology, Savitribai Phule Pune University, Pune, India., Jadhav G; Department of Biotechnology, Savitribai Phule Pune University, Pune, India., Upadhya MA; Indian Institute of Science Education and Research (IISER), Pune, India., Khedkar T; Department of Zoology, Nabira Mahavidyalay, Katol, India., Gadhikar YA; Department of Zoology, Government Vidarbha Institute of Science and Humanities, Amravati, India., Sakharkar AJ; Department of Biotechnology, Savitribai Phule Pune University, Pune, India., Subhedar NK; Indian Institute of Science Education and Research (IISER), Pune, India., Kokare DM; Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India.
Jazyk: angličtina
Zdroj: Journal of neurochemistry [J Neurochem] 2024 Jul; Vol. 168 (7), pp. 1402-1419. Date of Electronic Publication: 2024 Mar 06.
DOI: 10.1111/jnc.16090
Abstrakt: The role of nitrergic system in modulating the action of psychostimulants on reward processing is well established. However, the relevant anatomical underpinnings and scope of the involved interactions with mesolimbic dopaminergic system have not been clarified. Using immunohistochemistry, we track the changes in neuronal nitric oxide synthase (nNOS) containing cell groups in the animals conditioned to intracranial self-stimulation (ICSS) via an electrode implanted in the lateral hypothalamus-medial forebrain bundle (LH-MFB) area. An increase in the nNOS immunoreactivity was noticed in the cells and fibers in the ventral tegmental area (VTA) and nucleus accumbens shell (AcbSh), the primary loci of the reward system. In addition, nNOS was up-regulated in the nucleus accumbens core (AcbC), vertical limb of diagonal band (VDB), locus coeruleus (LC), lateral hypothalamus (LH), superficial gray layer (SuG) of the superior colliculus, and periaqueductal gray (PAG). The brain tissue fragments drawn from these areas showed a change in nNOS mRNA expression, but in opposite direction. Intracerebroventricular (icv) administration of nNOS inhibitor, 7-nitroindazole (7-NI) showed decreased lever press activity in a dose-dependent manner in ICSS task. While an increase in the dopamine (DA) and 3, 4-dihydroxyphenylacetic acid (DOPAC) efflux was noted in the microdialysates collected from the AcbSh of ICSS rats, pre-administration of 7-NI (icv route) attenuated the response. The study identifies nitrergic centers that probably mediate sensory, cognitive, and motor components of the goal-directed behavior.
(© 2024 International Society for Neurochemistry.)
Databáze: MEDLINE
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