کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8479421 | 1551319 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lysophosphatidic acid stimulates astrocyte proliferation through LPA1
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیولوژی سلول
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چکیده انگلیسی
Lysophosphatidic acid (LPA) is an extracellular lipid mediator that regulates nervous system development and functions through multiple types of LPA receptors. Here we explore the role of LPA receptor subtypes in cortical astrocyte functions. Astrocytes cultured under serum-free conditions were found to express the genes of five LPA receptor subtypes, lpa1 to lpa5. When astrocytes were treated with dibutyryl cyclic adenosine monophosphate, a reagent inducing astrocyte differentiation or activation, lpa1 expression levels remained unchanged, but those of other LPA receptor subtypes were relatively reduced. LPA stimulated DNA synthesis in both undifferentiated and differentiated astrocytes, but failed to do so in astrocytes prepared from mice lacking lpa1 gene. LPA also inhibited [3H]-glutamate uptake in both undifferentiated and differentiated astrocytes; and LPA-induced inhibition of glutamate uptake was still observed in lpa1-deficient astrocytes. Taken together, these observations demonstrate that LPA1 mediates LPA-induced stimulation of cell proliferation but not inhibition of glutamate uptake in astrocytes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurochemistry International - Volume 52, Issues 1â2, January 2008, Pages 216-220
Journal: Neurochemistry International - Volume 52, Issues 1â2, January 2008, Pages 216-220
نویسندگان
Shinya Shano, Ryutaro Moriyama, Jerold Chun, Nobuyuki Fukushima,