Lactate calcium salt affects the viability of colorectal cancer cells via betaine homeostasis

Life Sciences
Yeong-Su JangHwan Mook Kim

Abstract

Betaine plays an important role in cellular homeostasis. However, the physiological roles of betaine-γ-aminobutyric acid (GABA) transporter (BGT-1) are still being disputed in cancer. In this study, we tried to find the possibility of the antitumor effect on colorectal cancer (CRC) cell via lactate calcium salt (CaLa)-induced BGT-1 downregulation. The CRC cell viability and clonogenic assay was performed using different doses of BGT-1 inhibitor. The expression level of BGT-1 was measured following the treatment of 2.5mM CaLa. Betaine was treated to confirm the resistance of the antitumor activity by CaLa. Tumor growth was also measured using a xenograft animal model. Long-term exposure of 2.5mM CaLa clearly decreased the expression of BGT-1 in the CRC cells. As a result of the downregulation of BGT-1 expression, the clonogenic ability of CRC cells was also decreased in the 2.5mM CaLa-treated group. Reversely, the number of colonies and cell viability was increased by combination treatment with betaine and 2.5mM CaLa, as compared with a single treatment of 2.5mM CaLa. Tumor growth was significantly inhibited in the xenograft model depending on BGT-1 downregulation by 2.5mM CaLa treatment. These results support the idea that long...Continue Reading

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Citations

Mar 12, 2021·The Journal of Nutritional Biochemistry·Juncheng LiuXinchun Shen

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