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5-oxo-ETE activates migration of H295R adrenocortical cells via MAPK and PKC pathways.
ProstaglandIns & Other Lipid Mediators ( IF 2.9 ) Pub Date : 2019-07-10 , DOI: 10.1016/j.prostaglandins.2019.106346
Isabel Neuman 1 , Mariana Cooke 2 , Nicolás Agustín Lemiña 3 , Marcelo G Kazanietz 2 , Fabiana Cornejo Maciel 1
Affiliation  

The OXE receptor is a GPCR activated by eicosanoids produced by the action of 5-lipoxygenase. We previously found that this membrane receptor participates in the regulation of cAMP-dependent and -independent steroidogenesis in human H295R adrenocortical carcinoma cells. In this study we analyzed the effects of the OXE receptor physiological activator 5-oxo-ETE on the growth and migration of H259R cells. While 5-oxo-ETE did not affect the growth of H295R cells, overexpression of OXE receptor caused an increase in cell proliferation, which was further increased by 5-oxo-ETE and blocked by 5-lipoxygenase inhibition. 5-oxo-ETE increased the migratory capacity of H295R cells in wound healing assays, but it did not induce the production of metalloproteases MMP-1, MMP-2, MMP-9 and MMP-10. The pro-migratory effect of 5-oxo-ETE was reduced by pharmacological inhibition of the MEK/ERK1/2, p38 and PKC pathways. 5-oxo-ETE caused significant activation of ERK and p38. ERK activation by the eicosanoid was reduced by the "pan" PKC inhibitor GF109203X but not by the classical PKC inhibitor Gö6976, suggesting the involvement of novel PKCs in this effect. Although H295R cells display detectable phosphorylation of Ser299 in PKCδ, a readout for the activation of this novel PKC, treatment with 5-oxo-ETE per se was unable to induce additional PKCδ activation. Our results revealed signaling effectors activated by 5-oxo-ETE in H295R cells and may have significant implications for our understanding of OXE receptor in adrenocortical cell pathophysiology.

中文翻译:

5-oxo-ETE通过MAPK和PKC途径激活H295R肾上腺皮质细胞的迁移。

OXE受体是由5-脂氧合酶作用产生的类花生酸活化的GPCR。我们以前发现该膜受体参与人H295R肾上腺皮质癌细胞中cAMP依赖性和非依赖性类固醇生成的调节。在这项研究中,我们分析了OXE受体生理激活剂5-oxo-ETE对H259R细胞生长和迁移的影响。尽管5-氧代-ETE不会影响H295R细胞的生长,但是OXE受体的过表达会导致细胞增殖的增加,而5-氧代-ETE会进一步增加细胞增殖,而5-氧代加氧酶的抑制作用则会阻止这种增殖。5-oxo-ETE在伤口愈合试验中增加了H295R细胞的迁移能力,但没有诱导金属蛋白酶MMP-1,MMP-2,MMP-9和MMP-10的产生。通过药理抑制MEK / ERK1 / 2,p38和PKC途径降低了5-oxo-ETE的促迁移作用。5-oxo-ETE引起ERK和p38的显着激活。“泛” PKC抑制剂GF109203X降低了类花生酸的ERK激活,但经典PKC抑制剂Gö6976却没有,这表明新型PKC参与了这一作用。尽管H295R细胞在PKCδ中显示出可检测到的Ser299磷酸化,这是该新型PKC活化的读数,但是用5-oxo-ETE本身处理无法诱导其他PKCδ活化。我们的研究结果揭示了H295R细胞中5-oxo-ETE激活的信号传导效应子,可能对我们在肾上腺皮质细胞病理生理学中对OXE受体的理解具有重要意义。5-oxo-ETE引起ERK和p38的显着激活。“泛” PKC抑制剂GF109203X降低了类花生酸的ERK激活,但经典PKC抑制剂Gö6976却没有,这表明新型PKC参与了这一作用。尽管H295R细胞在PKCδ中显示出可检测到的Ser299磷酸化,这是该新型PKC活化的读数,但是用5-oxo-ETE本身处理无法诱导其他PKCδ活化。我们的研究结果揭示了H295R细胞中5-oxo-ETE激活的信号传导效应子,可能对我们在肾上腺皮质细胞病理生理学中对OXE受体的理解具有重要意义。5-oxo-ETE引起ERK和p38的显着激活。“泛” PKC抑制剂GF109203X降低了类花生酸的ERK激活,但经典PKC抑制剂Gö6976却没有,这表明新型PKC参与了这一作用。尽管H295R细胞在PKCδ中显示出可检测到的Ser299磷酸化,这是该新型PKC活化的读数,但是用5-oxo-ETE本身处理无法诱导其他PKCδ活化。我们的研究结果揭示了H295R细胞中5-oxo-ETE激活的信号传导效应子,可能对我们在肾上腺皮质细胞病理生理学中对OXE受体的理解具有重要意义。提示新型PKC参与了这种效应。尽管H295R细胞在PKCδ中显示出可检测到的Ser299磷酸化,这是该新型PKC活化的读数,但是用5-oxo-ETE本身处理无法诱导其他PKCδ活化。我们的研究结果揭示了H295R细胞中5-oxo-ETE激活的信号传导效应子,可能对我们在肾上腺皮质细胞病理生理学中对OXE受体的理解具有重要意义。提示新型PKC参与了这种效应。尽管H295R细胞在PKCδ中显示出可检测到的Ser299磷酸化,这是该新型PKC活化的读数,但是用5-oxo-ETE本身处理无法诱导其他PKCδ活化。我们的研究结果揭示了H295R细胞中5-oxo-ETE激活的信号传导效应子,可能对我们在肾上腺皮质细胞病理生理学中对OXE受体的理解具有重要意义。
更新日期:2019-11-01
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