RGD Reference Report - Preferential localization of prostamide/prostaglandin F synthase in myelin sheaths of the central nervous system. - Rat Genome Database

RGD Reference Report - Preferential localization of prostamide/prostaglandin F synthase in myelin sheaths of the central nervous system. - Rat Genome Database

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Preferential localization of prostamide/prostaglandin F synthase in myelin sheaths of the central nervous system.
Authors:	Yoshikawa, K Takei, S Hasegawa-Ishii, S Chiba, Y Furukawa, A Kawamura, N Hosokawa, M Woodward, DF Watanabe, K Shimada, A
Citation:	Yoshikawa K, etal., Brain Res. 2011 Jan 7;1367:22-32. doi: 10.1016/j.brainres.2010.10.019. Epub 2010 Oct 13.
RGD ID:	8554513
Pubmed:	PMID:20950588 (View Abstract at PubMed)
DOI:	DOI:10.1016/j.brainres.2010.10.019 (Journal Full-text)
Prostaglandin (PG) F((2)alpha) is a product of cyclooxygenase (COX)-catalyzed metabolism of arachidonic acid and exerts biological functions in various tissues. Prostaglandin ethanolamide (prostamide) F((2)alpha) is a COX-2-catalyzed metabolite of arachidonoyl ethanolamide (anandamide) that induces pharmacological actions in ocular tissues. Although PGF((2)alpha) is one of the most abundant prostaglandins in the brain, function of PGF((2)alpha) in the central nervous system (CNS) has not been extensively investigated. Recently identified prostamide/PGF synthase catalyzes the reductions of prostamide H(2) to prostamide F((2)alpha) and PGH(2) to PGF((2)alpha), chiefly in the CNS. We examined tissue distribution of the enzyme in the CNS by immunohistochemistry, double immunofluorescence, and immuno-electron microscopy. We confirmed histological findings by immunofluorescence analyses of brain cell cultures. Prostamide/PGF synthase was expressed preferentially in the white matter bundles of the entire CNS of adult mice with less marked expression in neuronal cell bodies. The enzyme was colocalized with myelin basic protein (MBP) in myelin sheaths but not in axons. At the ultrastructural level, the enzyme was localized to myelin sheaths. Expression of the enzyme increased between P9 and P14 during the postnatal development, presumably in accordance with myelinogenesis. Cultured oligodendrocytes at 7 days in vitro expressed the enzyme in cytoplasmic processes where the enzyme was colocalized with MBP. Immunoreactivity for COX-2 was detected in white matter and cultured oligodendrocytes. Relatively selective localization of prostamide/PGF synthase suggests that myelin sheaths of the CNS may serve as the sites for producing prostamide F((2)alpha) and/or PGF((2)alpha), which may contribute to the formation and maintenance of central myelin.

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Cellular Component

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Term	Qualifier	Evidence	With	Reference	Notes	Source	Original Reference(s)
cytoplasm	located_in	IDA		8554513	PMID:20950588	UniProt
myelin sheath	located_in	IDA		8554513	PMID:20950588	UniProt

Objects Annotated

Genes (Rattus norvegicus)

Prxl2b (peroxiredoxin like 2B)

Ptgs2 (prostaglandin-endoperoxide synthase 2)

Additional Information