Shikimi T, Wessel T, Joh TH, Takahashi M, Kaneto H, Hattori K, Takaori S. Demonstration of a human urinary trypsin inhibitor (urinastatin)-like substance in the murine brain.
Brain Res 1993;
616:230-5. [PMID:
8358615 DOI:
10.1016/0006-8993(93)90213-7]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A human urinary trypsin inhibitor (urinastatin)-like immunoreactive substance with trypsin-inhibitory activities was found in the murine brain. Regional levels of this urinastatin (UT)-like substance in the brain were within 5 ng/mg protein and were expressed in a descending order as follows: cerebral cortex not equal to hippocampus > hypothalamus > mesencephalon not equal to corpus striatum >> medulla oblongata > cerebellum. Mechanical lesioning of the cerebral cortex or hippocampus with a needle induced a rapid and intense appearance of a UT-like immunoreactive substance in the neuronal cells of injured sites. Conditioned fear-stress induction incited a reversible increase in the level of UT-like immunoreactive substance in the hippocampus. These results suggest that the UT-like immunoreactive substance is produced by neurons in response to brain injury and fear-stress stimuli.
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