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Han H, Li J, Tian L, Pei L, Zheng M. Through regulation of the SIRT1 pathway plant sterol ester of α-linolenic acid inhibits pyroptosis thereby attenuating the development of NASH in mice. J Nutr Biochem 2023:109408. [PMID: 37336331 DOI: 10.1016/j.jnutbio.2023.109408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 05/26/2023] [Accepted: 06/14/2023] [Indexed: 06/21/2023]
Abstract
Increasing evidence demonstrated that pyroptosis and subsequent inflammation played an important role in the pathological process of non-alcoholic steatohepatitis (NASH). Plant sterol ester of α-linolenic acid (PS-ALA) was beneficial for non-alcoholic fatty liver disease, but the underlying mechanisms are still not fully understood. This study aims to investigate whether PS-ALA can protect against proptosis via regulating SIRT1. Thirty male C57BL/6J mice were fed a normal diet, a high-fat and high-cholesterol diet (HFCD), or a HFCD supplemented with either 1.3%ALA, 2%PS, or 3.3% PS-ALA for 24 weeks. Hepatocytes were treated with oleic acid and cholesterol (OA/Cho) with or without PS-ALA. We found that PS-ALA ameliorated NASH in HFCD-fed mice. In addition, PS-ALA decreased the expression of NLRP3 and ASC and reduced the co-localization of NLRP3 and cleave-Caspase-1. Also, PS-ALA protected against pyroptosis as evidenced by decreased co-localization of GSDMD and propidium iodide (PI) positive cells. Mechanistically, we revealed that the inhibitory action of PS-ALA on the pyroptosis was mediated by SIRT1. This was demonstrated by the fact that silencing SIRT1 with small interfering RNA or inhibition of SIRT1 with its inhibitor abolished the inhibition effect of PS-ALA on the expression of NLRP3 and GSDMD cleavage. Collectively, the data from the present study reveals a novel mechanism that PS-ALA inhibits pyroptosis and it triggered inflammation via stimulating SIRT1, which provides new insights into the beneficial effect of PS-ALA on NASH.
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Affiliation(s)
- Hao Han
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi 030001, PR CHINA..
| | - Jie Li
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi 030001, PR CHINA
| | - Lei Tian
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi 030001, PR CHINA
| | - Liyuan Pei
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi 030001, PR CHINA
| | - Mingming Zheng
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Wuhan 430062, PR CHINA..
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Han H, Xue T, Li J, Guo Y, Li X, Wang L, Pei L, Zheng M. Plant sterol ester of α-linolenic acid improved non-alcoholic fatty liver disease by attenuating endoplasmic reticulum stress-triggered apoptosis via activation of the AMPK. J Nutr Biochem 2022; 107:109072. [PMID: 35660097 DOI: 10.1016/j.jnutbio.2022.109072] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 02/02/2022] [Accepted: 05/03/2022] [Indexed: 11/16/2022]
Abstract
Apoptosis is a feature of progressions steatosis to nonalcoholic steatohepatitis (NASH) and can be explained by endoplasmic reticulum stress (ERS). The present study aimed to investigate the protective effects of plant sterol ester of α-linolenic acid (PS-ALA) on ERS-triggered apoptosis in high fat diet-fed mice and oleic acid-induced hepatocytes, and further explore the underlying mechanisms. Our results showed that PS-ALA improved NAFLD in both in vivo and in vitro models. Moreover, PS-ALA treatment can attenuate ERS and associated apoptosis via inhibiting IRE1α/TRAF2/JNK signal pathway. Furthermore, we found that the protective effect of PS-ALA on ERS-triggered apoptosis was mediated by activation of AMPK as pretreatment with Compound C, an AMPK inhibitor, abolished the anti-apoptotic effect of PS-ALA. Taken together, our results illustrate that PS-ALA attenuating ERS-mediated apoptosis via activating AMPK, which provided new insights into the protective effect of PS-ALA in NAFLD.
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Affiliation(s)
- Hao Han
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA.
| | - Tingli Xue
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA
| | - Jie Li
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA
| | - Yan Guo
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA
| | - Xiaoyu Li
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA
| | - Linqi Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA
| | - Liyuan Pei
- Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, No. 56, Xinjian South Road, Taiyuan, Shanxi, 030001, PR CHINA
| | - Mingming Zheng
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Wuhan, 430062, PR CHINA.
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