Abstract
There is recent evidence for ornithine transcarbamylase (OTC) expression in adult human brain. We decided to immunocytochemically map OTC throughout brain, and to further characterize OTC-immunopositive neurons. By using double immunolabeling technique for OTC and neuronal nitric oxide synthase (nNOS) OTC protein expression was revealed in a small subset of nitrergic (nNOS) neurons. Since citrulline (the reaction product of OTC) enhances the bioavailability of L-arginine, the substrate of nNOS, it is conceivable that OTC activity supports NO production in nitrergic neurons.
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Bernstein, HG., Dobrowolny, H., Keilhoff, G. et al. In human brain ornithine transcarbamylase (OTC) immunoreactivity is strongly expressed in a small number of nitrergic neurons. Metab Brain Dis 32, 2143–2147 (2017). https://doi.org/10.1007/s11011-017-0105-2
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DOI: https://doi.org/10.1007/s11011-017-0105-2