Increased production of lipocalin-type prostaglandin D synthase in leptomeningeal cells through contact with astrocytes.
Lipocalin-type prostaglandin D synthase (L-PGDS) is dominantly expressed in the leptomeninges surrounding the brain and secreted into the cerebrospinal fluid as beta-trace, a major cerebrospinal fluid protein. To examine the interaction between the leptomeninges and the brain parenchyma, we co-cultured rat leptomeningeal cells with cells dissociated from the neonatal rat cortex and found that the production of L-PGDS was remarkably increased after the co-cultivation. A similar increase in L-PGDS production was observed by the co-culturing of the leptomeningeal cells with cells dissociated from astrocyte-rich cultures or with 1321-N1 astrocytoma cells. When a crude membrane fraction prepared from 1321-N1 cells was added to leptomeningeal cell cultures, L-PGDS gene expression was slowly increased up to 48 h after the addition. These results indicate that leptomeningeal cells enhance their L-PGDS production by a slow activation of L-PGDS gene expression through their contact with astrocytes.
Laboratory of Biodefense and Regulation, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. fujimori@gly.oups.ac.jp
Ko
K
Fujimori
Masatomo
M
Watanabe
Yoshihiro
Y
Urade
Koichi
K
Ishikawa
D000818:Animals; D000831:Animals, Newborn; D001253:Astrocytes / Q000378:metabolism*; D002450:Cell Communication / Q000502:physiology; D045744:Cell Line, Tumor; D002478:Cells, Cultured; D018920:Coculture Techniques; D015870:Gene Expression; D015971:Gene Expression Regulation, Enzymologic; D006801:Humans; D019746:Intramolecular Oxidoreductases / Q000096:biosynthesis*; D054834:Lipocalins; D008578:Meninges / Q000166:cytology* / Q000201:enzymology*; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017208:Rats, Wistar; D020133:Reverse Transcriptase Polymerase Chain Reaction
D054834:Lipocalins; D012333:RNA, Messenger; D019746:Intramolecular Oxidoreductases; C022466:prostaglandin R2 D-isomerase