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• W2005453255 abstract "The prohormone convertase 2 (PC2) is hypothesized to convert multiple pro-neuropeptides into active peptides that function as neurotransmitters. To examine the in vivo role of PC2 in neuropeptide production, the tissue contents of six different neuropeptides in brain and peripheral nervous tissues were examined in PC2 deficient mice. Specific neuropeptide radioimmunoassays and RP-HPLC (reverse-phase HPLC) provided evaluation of processed, active neuropeptides in brain and neuroendocrine tissues of PC2 deficient mice. Results demonstrated three features with regard to the selective roles of PC2 in determining the production of NPY, somatostatin-28, enkephalin, VIP, galanin, and CRF in neuroendocrine tissues. Firstly, PC2 deficient mice showed changes in several neuropeptides, but not all neuropeptides examined. The absence of active PC2 resulted in altered cellular levels of NPY, somatostatin-28, and (Met)enkephalin; few changes in VIP or galanin occurred in the tissues examined. CRF content was not altered in brains of PC2 deficient mice. Secondly, comparison of a single neuropeptide among different tissues of PC2 deficient mice demonstrated tissue-selective roles for PC2 in production of the neuropeptide. For example, NPY levels were decreased in ileum of PC2 deficient mice, but NPY content was not altered in hypothalamus that is abundant in NPY. In addition, (Met)enkephalin levels in hypothalamus and cortex were decreased in PC2 deficient mice, but no changes were observed in adrenal or intestine. Thirdly, a single tissue region often showed selective alterations among different neuropeptides. For example, the neuropeptide-rich hypothalamus region showed decreased (Met)enkephalin in PC2 deficient mice, but NPY, VIP, galanin, and CRF were not altered. These results demonstrate the selective role of PC2 in neuropeptide production that provides active peptide neurotransmitter or hormones for biological functions in brain and neuroendocrine systems." @default.
• W2005453255 created "2016-06-24" @default.
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• W2005453255 date "2003-06-01" @default.
• W2005453255 modified "2023-10-10" @default.
• W2005453255 title "Selective roles for the PC2 processing enzyme in the regulation of peptide neurotransmitter levels in brain and peripheral neuroendocrine tissues of PC2 deficient mice" @default.
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• W2005453255 doi "https://doi.org/10.1016/s0143-4179(03)00027-1" @default.
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