Chronic food restriction alters μ and κ opioid receptor binding in the parabrachial nucleus of the rat: a quantitative autoradiographic study

Autor: Wolinsky, Toni D., Carr, Kenneth D., Hiller, Jacob M., Simon, Eric J.
Zdroj: Brain Research; January 1996, Vol. 706 Issue: 2 p333-336, 4p
Abstrakt: Using quantitative autoradiography, it was previously observed that chronic food restriction alters μ and κ receptor binding in several regions of the rat forebrain. The present autoradiographic study was designed to investigate whether food restriction affects regional μ and κ binding in the brainstem. [3H]DAGO (It,) and μ/δ blocked [3H]BMZ (κ) binding were analyzed in 21 brainstem regions. A signficant decrease in μ binding was observed in the external lateral and external medial subnuclei of the parabrachial nucleus while a significant increase in κ binding was observed in the external lateral subnucleus. The possible functional significance of these changes is discussed.
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