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l-carnosine induces apoptosis/cell cycle arrest via suppression of NF-κB/STAT1 pathway in HCT116 colorectal cancer cells

l-carnosine induces apoptosis/cell cycle arrest via suppression of NF-κB/STAT1 pathway in HCT116... l-carnosine, a dipeptide of the amino acids β-alanine and histidine, is found in various tissues, such as the central nervous system and skeletal muscles. Recently, l-carnosine has been reported to possess anti-tumor activity; however, the molecular mechanism underlying its activity in colorectal cancer is still unknown. Therefore, we investigated the effect of l-carnosine using a human colorectal cancer cell line, HCT116. Treatment with l-carnosine (0, 100, or 200 mM) for 24 h gradually reduced cellular proliferation according to immunochemistry and 7-aminoactinomycin D (7-AAD) analyses and induced G0/G1 phase arrest. In the RT-PCR analysis, l-carnosine decreased the mRNA levels of cell cycle-related genes in HCT116 cells. In the Western blot analysis, levels of the cyclin D1, BAX/Bcl-2, cleaved caspase-3, p21, and p53 proteins were significantly increased in cells treated with l-carnosine. We next determined whether STAT1/NF-κB pathway is involved in regulation of cell cycle arrest- and cell death-associated gene in HCT116. The l-carnosine treatment significantly inhibited the phosphorylation of STAT1 on Tyr701 and NF-κB p65 on Ser276 and Ser536, and then, we exogenously blocked the NF-κB phosphorylation using Bay 11-7082. Based on our findings, l-carnosine induces cell cycle arrest and apoptosis in human colorectal cancer cells by suppressing of NF-κB/STAT1 signaling. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png In Vitro Cellular & Developmental Biology - Animal Springer Journals

l-carnosine induces apoptosis/cell cycle arrest via suppression of NF-κB/STAT1 pathway in HCT116 colorectal cancer cells

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Publisher
Springer Journals
Copyright
Copyright © 2018 by The Society for In Vitro Biology
Subject
Life Sciences; Cell Biology; Developmental Biology; Stem Cells; Cell Culture; Animal Genetics and Genomics
ISSN
1071-2690
eISSN
1543-706X
DOI
10.1007/s11626-018-0264-4
pmid
29869056
Publisher site
See Article on Publisher Site

Abstract

l-carnosine, a dipeptide of the amino acids β-alanine and histidine, is found in various tissues, such as the central nervous system and skeletal muscles. Recently, l-carnosine has been reported to possess anti-tumor activity; however, the molecular mechanism underlying its activity in colorectal cancer is still unknown. Therefore, we investigated the effect of l-carnosine using a human colorectal cancer cell line, HCT116. Treatment with l-carnosine (0, 100, or 200 mM) for 24 h gradually reduced cellular proliferation according to immunochemistry and 7-aminoactinomycin D (7-AAD) analyses and induced G0/G1 phase arrest. In the RT-PCR analysis, l-carnosine decreased the mRNA levels of cell cycle-related genes in HCT116 cells. In the Western blot analysis, levels of the cyclin D1, BAX/Bcl-2, cleaved caspase-3, p21, and p53 proteins were significantly increased in cells treated with l-carnosine. We next determined whether STAT1/NF-κB pathway is involved in regulation of cell cycle arrest- and cell death-associated gene in HCT116. The l-carnosine treatment significantly inhibited the phosphorylation of STAT1 on Tyr701 and NF-κB p65 on Ser276 and Ser536, and then, we exogenously blocked the NF-κB phosphorylation using Bay 11-7082. Based on our findings, l-carnosine induces cell cycle arrest and apoptosis in human colorectal cancer cells by suppressing of NF-κB/STAT1 signaling.

Journal

In Vitro Cellular & Developmental Biology - Animal – Springer Journals

Published: Jun 4, 2018

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