ABCA8-mediated efflux of taurocholic acid contributes to gemcitabine insensitivity in human pancreatic cancer via the S1PR2-ERK pathway.
ABCA8-mediated efflux of taurocholic acid contributes to gemcitabine insensitivity in human pancreatic cancer via the S1PR2-ERK pathway.
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ABCA8 介导的牛磺胆酸外流通过 S1PR2-ERK 通路导致人类胰腺癌吉西他滨不敏感
DOI：
10.1038/s41420-020-00390-z
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发表时间：
2021-01-11
影响因子：
7
通讯作者：
Gan Y
中科院分区：
文献类型：
--
作者：
Yang C;Yuan H;Gu J;Xu D;Wang M;Qiao J;Yang X;Zhang J;Yao M;Gu J;Tu H;Gan Y
The development of resistance to anticancer drugs is believed to cause chemotherapy failure in pancreatic cancer (PC). The efflux of anticancer drugs mediated by ATP-binding cassette (ABC) transporters is a widely accepted mechanism for chemoresistance, but for ABCA subfamily members, which are characterized by their ability to transport lipids and cholesterol, its role in chemoresistance remains unknown. Here we found that the expression of ABCA8, a member of ABCA subfamily transporters, was significantly increased in human PC cells after gemcitabine (GEM) treatment, as well as in established GEM-resistant (Gem-R) PC cells. Importantly, ABCA8 knockdown reversed the chemoresistance phenotype of Gem-R cells, whereas ABCA8 overexpression significantly decreased the sensitivity of human PC cells to GEM, both in vitro and in vivo, demonstrating an important role of ABCA8 in regulating chemosensitivity. Moreover, our results showed that treatment with taurocholic acid (TCA), an endogenous substrate of ABCA8, also induced GEM insensitivity in PC cells. We further demonstrated that ABCA8 mediates the efflux of TCA out of PC cells, and that extracellular TCA activates extracellular signal-regulated kinase (ERK) signaling via the sphingosine 1-phosphate receptor 2 (S1PR2), which is responsible for ABCA8-induced GEM ineffectiveness. Together, these findings reveal a novel TCA-related mechanism of ABCA subfamily transporter-mediated chemoresistance that goes beyond the role of a drug pump and suggest ABCA8 or the TCA-S1RP2-ERK pathway as potential targets for improving the effectiveness of and overcoming the resistance to chemotherapy in PC.
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DOI：
10.1111/febs.12446
发表时间：
2013-12
期刊：
The FEBS journal
影响因子：
--
作者：
Adada M;Canals D;Hannun YA;Obeid LM
通讯作者：
Obeid LM
影响因子：
10.3
作者：
Hedditch, Ellen L.;Gao, Bo;Henderson, Michelle J.
通讯作者：
Henderson, Michelle J.
影响因子：
5.6
作者：
Ahmmed, Bulbul;Kampo, Sylvanus;Yan, Qiu
通讯作者：
Yan, Qiu
影响因子：
13.5
作者：
Liu, Runping;Zhao, Renping;Zhou, Xiqiao;Liang, Xiuyin;Campbell, Deanna J. W.;Zhang, Xiaoxuan;Zhang, Luyong;Shi, Ruihua;Wang, Guangji;Pandak, William M.;Sirica, Alphonse E.;Hylemon, Phillip B.;Zhou, Huiping
通讯作者：
Zhou, Huiping
影响因子：
254.7
作者：
Jemal, Ahmedin;Siegel, Rebecca;Ward, Elizabeth
通讯作者：
Ward, Elizabeth