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- W2065492096 abstract "Abstract The expression of lysophosphatidic acid (LPA)‐specific receptors in cervical cancer has not been clearly defined. In this study, we identified LPA1, LPA2 and LPA3 receptors' mRNA in SiHa, HeLa and CaSki cell lines by RT‐PCR. These receptors were not associated with tumor cell proliferation in vitro. We then used a xenograph animal model to evaluate the effects of these receptors on in vivo cervical cancer tumorigenicity. When SiHa cells with different receptor expression patterns were seeded on the backs of SCID mice, the resulting knockout of both LPA2 and LPA3 significantly attenuated tumor growth; this decrease in tumor growth was found to be linked with decreased angiogenesis (microvessel density), suggesting that LPA2 and LPA3 are crucial for in vivo tumor growth through an angiogenic mechanism. We further investigated this mechanism of LPA receptor 2/3‐mediated angiogenic capability by analyzing angiogenic factors in protein lysates from receptor knockout tumors, by detecting interleukin (IL‐8) mRNA expression after treating with siRNA, by evaluating the biological role of LPA‐enhanced IL‐8 via endothelial cell tube formation, monolayer permeability, migration and cell growth assays, and by IL‐8 knockout xenograft mice modeling. We found that the angiogenesis is mediated through IL‐8. Finally, we evaluated the regulation pathways involved in LPA‐induced IL‐8 expression. We found that LPA receptor 2/3‐mediated IL‐8 expression occurs through Gi/PI3K/AKT, Gi/PKC and IκB/NF‐κB signaling. In conclusion, we propose that LPA2 and LPA3 might play an important role in cervical cancer tumor growth through IL‐8‐dependent angiogenesis." @default.
- W2065492096 created "2016-06-24" @default.
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- W2065492096 date "2011-11-08" @default.
- W2065492096 modified "2023-10-18" @default.
- W2065492096 title "Lysophosphatidic acid receptor 2/3-mediated IL-8-dependent angiogenesis in cervical cancer cells" @default.
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- W2065492096 doi "https://doi.org/10.1002/ijc.26476" @default.
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