PMID- 2293084 OWN - NLM STAT- MEDLINE DCOM- 19910409 LR - 20190701 IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 120 IP - 1 DP - 1990 Nov 27 TI - Evidence for a role of neosynthetized putrescine in the increase of glial fibrillary acidic protein immunoreactivity induced by a mechanical lesion in the rat brain. PG - 13-6 AB - The effect of alpha-difluoromethylornithine (alpha-DFMO), an irreversible inhibitor of ornithine decarboxylase (ODC) the rate limiting enzyme of polyamine biosynthesis, was studied on the astroglial reaction in a model of mechanical brain injury. alpha-DFMO markedly decreased the astroglial activation induced by the microdialysis probe implantation in the striatum of the male rat, as studied by glial fibrillary acidic protein (GFAP) immunocytochemistry. This response was restored by putrescine (20 nmol/ml) administered via the microdialysis probe. These results suggest that the astroglial reaction and the polyamine biosynthesis activation induced by a localized mechanical lesion are causally linked phenomena. FAU - Zini, I AU - Zini I AD - Institute of Human Physiology, University of Modena, Italy. FAU - Zoli, M AU - Zoli M FAU - Grimaldi, R AU - Grimaldi R FAU - Pich, E M AU - Pich EM FAU - Biagini, G AU - Biagini G FAU - Fuxe, K AU - Fuxe K FAU - Agnati, L F AU - Agnati LF LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Glial Fibrillary Acidic Protein) RN - V10TVZ52E4 (Putrescine) RN - ZQN1G5V6SR (Eflornithine) SB - IM MH - Animals MH - Astrocytes/drug effects/*metabolism MH - Brain Injuries/*metabolism MH - Corpus Striatum/drug effects/*metabolism MH - Eflornithine/*pharmacology MH - Glial Fibrillary Acidic Protein/analysis/*biosynthesis MH - Male MH - Putrescine/*biosynthesis/pharmacology MH - Rats MH - Rats, Inbred Strains MH - Reference Values EDAT- 1990/11/27 00:00 MHDA- 1990/11/27 00:01 CRDT- 1990/11/27 00:00 PHST- 1990/11/27 00:00 [pubmed] PHST- 1990/11/27 00:01 [medline] PHST- 1990/11/27 00:00 [entrez] AID - 0304-3940(90)90156-4 [pii] AID - 10.1016/0304-3940(90)90156-4 [doi] PST - ppublish SO - Neurosci Lett. 1990 Nov 27;120(1):13-6. doi: 10.1016/0304-3940(90)90156-4.