Phospholipase A2 expression in human and rodent insulin-secreting cells

Phospholipase A2 expression in human and rodent insulin-secreting cells
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人和啮齿动物胰岛素分泌细胞中磷脂酶 A2 的表达

DOI:
10.1016/0303-7207(95)03595-x
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发表时间:
1995
影响因子:
4.1
通讯作者:
N. Morgan
N. Morgan
中科院分区:
医学2区
文献类型:
--
作者:
A. C. Loweth;J. Scarpello;N. Morgan

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利用针对人胞浆(cPLA2)或人I和II群分泌(sPLA2)亚型的多克隆抗血清,研究了磷脂酶a2在人和大鼠朗格汉斯胰岛以及克隆b细胞系HIT_T15和RINm5F中不同亚型的表达。在人胰岛的细胞质提取物中检测到大量与cpla2相对应的100 kda蛋白。在大鼠胰岛、RINm5F或HIT-T15细胞中,使用抗cpla2血清检测不到100 kda的cpla2,尽管该抗血清与来自大鼠肾脏的cpla2有交叉反应。人类和大鼠胰岛表达一种21 kda蛋白,与I组spla2抗血清具有免疫反应。II组spla2未在人或大鼠胰岛中检测到。RIN细胞不表达可检测水平的I组或II组sPLA2,但HIT细胞表达可变数量的II组sPLA2。pla2表达的这些差异表明,在推断从胰岛素分泌细胞系到正常朗格汉斯岛的脂质衍生信号分子的结论时,应谨慎行事。
The expression of different isoforms of phospholipase A2in human and rat islets of Langerhans and in the clonal B-cell lines, HIT_T15 and RINm5F has been investigated, using polyclonal antisera specific to human cytosolic (cPLA2) or human Groups I and II secretory (sPLA2) isoforms. Abundant levels of a 100-kDa protein corresponding to cPLA2were detected in cytosolic extracts of human islets. A 100-kDa cPLA2was not detectable in rat islets, RINm5F or HIT-T15 cells using an anti-cPLA2serum raised against cloned human cPLA2cDNA, despite the antiserum being cross-reactive with cPLA2from rat kidney. Human and rat islets were found to express a 21-kDa protein immunoreactive with Group I sPLA2antiserum. Group II sPLA2was not detected in human or rat islets. RIN cells did not express detectable levels of either Group I or Group II sPLA2, but HIT cells expressed variable quantities of Group II sPLA2. These differences in PLA2expression suggest that caution should be exercised when extrapolating conclusions about lipid-derived signalling molecules from insulin-secreting cell lines to normal islets of Langerhans.
DOI: 10.1016/0005-2760(92)90057-3
发表时间: 1992
期刊: Biochimica et biophysica acta
影响因子: --
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发表时间: 1986
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期刊: Biochemistry
影响因子: 2.9
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DOI: 10.1042/bj2710037
发表时间: 1990
期刊: The Biochemical journal
影响因子: --
作者:
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