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Xia P, Wu Y, Lian S, Quan G, Wang Y, Zhu G. Deletion of FaeG alleviated Enterotoxigenic Escherichia coli F4ac-induced apoptosis in the intestine. AMB Express 2021; 11:44. [PMID: 33738650 PMCID: PMC7973317 DOI: 10.1186/s13568-021-01201-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/03/2021] [Indexed: 12/19/2022] Open
Abstract
Enterotoxigenic Escherichia coli (ETEC) F4ac is a major constraint to the development of the pig industry, which is causing newborn and post-weaning piglets diarrhea. Previous studies proved that FaeG is the major fimbrial subunit of F4ac E. coli and efficient for bacterial adherence and receptor recognition. Here we show that the faeG deletion attenuates both the clinical symptoms of F4ac infection and the F4ac-induced intestinal mucosal damage in piglets. Antibody microarray analysis and the detection of mRNA expression using porcine neonatal jejunal IPEC-J2 cells also determined that the absence of FaeG subunit alleviated the F4ac promoted apoptosis in the intestinal epithelial cells. Thus, targeted depletion of FaeG is still beneficial for the prevention or treatment of F4ac infection.
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Xia Y, Bin P, Liu S, Chen S, Yin J, Liu G, Tang Z, Ren W. Enterotoxigenic Escherichia coli infection promotes apoptosis in piglets. Microb Pathog 2018; 125:290-294. [PMID: 30243552 DOI: 10.1016/j.micpath.2018.09.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 09/15/2018] [Accepted: 09/18/2018] [Indexed: 11/18/2022]
Abstract
Enterotoxigenic Escherichia coli (ETEC), as a universal pathogen, often causes diarrhea in animals and humans. However, whether ETEC infection induces apoptosis in host remains controversial. Herein, we use ETEC-infected piglet to investigate apoptosis in the jejunum. Apoptosis and the activation of capase-3 are observed in piglet jejunum after ETEC infection. Additionally, ETEC infection induces the activation of caspase-8 pathway, but inhibits the activation of caspase-9 pathway in piglet jejunum. These findings demonstrate that ETEC infection may inhibit the intrinsic pathway and activate the extrinsic pathway of apoptosis in piglets.
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Affiliation(s)
- Yaoyao Xia
- Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125, Hunan, China; Guangdong Provincial Key Laboratory of Animal Nutrition Control, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Peng Bin
- Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product, Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Shaojuan Liu
- Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125, Hunan, China
| | - Shuai Chen
- Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125, Hunan, China
| | - Jie Yin
- Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125, Hunan, China
| | - Gang Liu
- Laboratory of Animal Nutrition and Health and Key Laboratory of Agro-Ecology, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125, Hunan, China
| | - Zhiyi Tang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China.
| | - Wenkai Ren
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, China; Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product, Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou, China.
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Meng J, Zhang QX, Lu RR. Surface layer protein from Lactobacillus acidophilus NCFM inhibit intestinal pathogen-induced apoptosis in HT-29 cells. Int J Biol Macromol 2017; 96:766-774. [DOI: 10.1016/j.ijbiomac.2016.12.085] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 09/29/2016] [Accepted: 12/31/2016] [Indexed: 12/18/2022]
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Kim JH, Kang JW, Kim MS, Bak Y, Park YS, Jung KY, Lim YH, Yoon DY. The apoptotic effects of the flavonoid N101-2 in human cervical cancer cells. Toxicol In Vitro 2011; 26:67-73. [PMID: 22056764 DOI: 10.1016/j.tiv.2011.10.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 07/28/2011] [Accepted: 10/20/2011] [Indexed: 02/09/2023]
Abstract
This study evaluated the anti-cancer effects of a naringenin derivative in human cervical cancer cells. In this study, a synthesized naringenin derivative, diethyl 5,7,4'-trihydroxy flavanone N-phenyl hydrazone (N101-2), inhibited cervical cancer cell growth, whereas naringenin itself exhibited no anti-cancer activity. N101-2 treatment inhibited cancer cell viability in a dose- and time-dependent manner through cell cycle arrest at sub-G1 phase, accompanied by an increase in apoptotic cell death. Expression of cyclins and ppRB was down-regulated, whereas that of CDK inhibitors and p53 increased upon N101-2 treatment. Meanwhile, we detected processing of caspases-8, -9, and -3, cleavage of PARP, as well as Bax up-regulation, which indicates activation of mitochondria-emanated intrinsic apoptosis signaling. Treatment with caspase-8 and -3 inhibitors also recovered cell cycling, and Fas/FasL expression increased in N101-2-treated cervical cancer cells, suggesting that Fas-mediated extrinsic apoptosis signaling was also activated. The tumor suppressor PTEN and its upstream regulator PPARγ were up-regulated with coincident inhibition of PI3K and phospho-Akt after N101-2 treatment. Taken together, we could conclude that N101-2 induces apoptosis by arresting the cell cycle at sub-G1 phase, activating mitochondria-emanated intrinsic and Fas-mediated extrinsic signaling pathways, and inhibiting the PI3K/AKT pathway in CaSki and SiHa human cervical cancer cells.
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Affiliation(s)
- Jung-Hee Kim
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul, Republic of Korea
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