PMID- 10498822 OWN - NLM STAT- MEDLINE DCOM- 19991122 LR - 20191210 IS - 0894-1491 (Print) IS - 0894-1491 (Linking) VI - 28 IP - 1 DP - 1999 Oct TI - Thapsigargin induces microglial transformation from amoeboid to ramified type in vitro. PG - 49-52 AB - Microglia generally display amoeboid morphology under prevalent culture conditions. We found that cultured microglia derived from rat cerebral cortex undergo a morphological transformation from amoeboid to process-bearing microglia upon treatment with thapsigargin (TG), a specific Ca2+-ATPase inhibitor of endoplasmic reticulum. Microglial transformation was further enhanced by exposure of amoeboid microglia to serum-free (N2) medium containing TG (TG/N2 treatment). TG/N2-treated microglia showed a marked reduction in the activity of phagocytosis and showed down-regulated expression of MRF-1 or F4/80, which are markers for activated microglia. Thus, both morphological and physiological criteria suggest that TG promotes the ramification of amoeboid microglia in vitro. This method would be helpful in characterization of ramified microglia in vitro. CI - Copyright 1999 Wiley-Liss, Inc. FAU - Yagi, R AU - Yagi R AD - Molecular Neurobiology Laboratory, Graduate School of Science, Hokkaido University, Sapporo, Japan. FAU - Tanaka, S AU - Tanaka S FAU - Koike, T AU - Koike T LA - eng PT - Journal Article PL - United States TA - Glia JT - Glia JID - 8806785 RN - 0 (Culture Media, Serum-Free) RN - 0 (Enzyme Inhibitors) RN - 67526-95-8 (Thapsigargin) RN - EC 7.2.2.10 (Calcium-Transporting ATPases) SB - IM EIN - Glia 2000 Jan 1;29(1):102 MH - Animals MH - Calcium-Transporting ATPases/*antagonists & inhibitors MH - Cell Polarity/drug effects MH - Cells, Cultured MH - Cerebral Cortex/cytology/drug effects/enzymology MH - Culture Media, Serum-Free MH - Enzyme Inhibitors/*pharmacology MH - Microglia/*drug effects/enzymology/*ultrastructure MH - Phagocytosis/drug effects MH - Rats MH - Thapsigargin/*pharmacology EDAT- 1999/09/28 09:00 MHDA- 2000/03/04 09:00 CRDT- 1999/09/28 09:00 PHST- 1999/09/28 09:00 [pubmed] PHST- 2000/03/04 09:00 [medline] PHST- 1999/09/28 09:00 [entrez] AID - 10.1002/(SICI)1098-1136(199910)28:1<49::AID-GLIA6>3.0.CO;2-V [pii] AID - 10.1002/(sici)1098-1136(199910)28:1<49::aid-glia6>3.0.co;2-v [doi] PST - ppublish SO - Glia. 1999 Oct;28(1):49-52. doi: 10.1002/(sici)1098-1136(199910)28:1<49::aid-glia6>3.0.co;2-v.