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Han YL, Kang ZX, Jin SW, Pan XL, Zhang HX, Zhang LY, Tang L. Electroacupuncture improves low-grade duodenal inflammation in FD rats by reshaping intestinal flora through the NF-κB p65/NLRP3 pyroptosis pathway. Heliyon 2024; 10:e31197. [PMID: 38807876 PMCID: PMC11131961 DOI: 10.1016/j.heliyon.2024.e31197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 05/11/2024] [Accepted: 05/13/2024] [Indexed: 05/30/2024] Open
Abstract
Electroacupuncture (EA) is an effective alternative for the treatment of functional dyspepsia (FD). It reduces low-grade duodenal inflammation and improves the symptoms of FD by downregulating the expression of NF-κB p65 and NLRP3, but its mechanism needs to be elucidated. To examine the regulatory effect of electroacupuncture (EA) on intestinal flora and NF-κB p65/NLRP3 pyroptosis pathway in FD rats. The FD rat model was established via multi-factor stress intervention for two weeks. The rats were randomly divided into the NC group, model group, NF-kB inhibitor group (NF-κB inhibitor BAY 11-7082 was administered), EA group, and EA + NF-kB inhibitor group. After 14 days of treatment, the rats were sacrificed, and the protein and mRNA levels of NF-κB p65, IκB, and NLRP3 in the duodenum were evaluated by Western blotting assays and real-time fluorescent quantitative PCR. The Illumina MiSeq sequencing platform was used to analyze the V4 region of the 16S rRNA gene of intestinal flora and predict functional genes. The concentration of short-chain fatty acids (SCFAs) in feces was assessed by metabolomics. EA can decrease low-grade duodenal inflammation and promote gastrointestinal motility in FD rats. This effect is mediated by inhibition of the NF-κB p65/NLRP3 pyroptosis pathway, an increase in the alpha and beta diversity of gut microbiota in the duodenum, an increase in the abundance of beneficial bacteria at the phylum and genus levels, and an increase in the content of SCFAs. The protective effect of EA against FD might involve multiple hierarchy and pathways. EA may remodel intestinal flora by inhibiting the NF-κB p65/NLRP3 pyroptosis pathway, thereby improving low-grade duodenal inflammation in FD rats.
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Affiliation(s)
- Yong-Li Han
- Acupuncture Department, The First Affiliated Hospital of Henan University of CM, Zhengzhou, Henan, 450003, China
| | - Zhao-Xia Kang
- Department of Acupuncture and Moxibustion, GuiZhou University of Traditional Chinese Medicine, GuiYang, GuiZhou, 550025, China
| | - Shu-Wen Jin
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hubei, 430061, China
| | - Xiao-Li Pan
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hubei, 430061, China
| | - Hong-Xing Zhang
- College of Acupuncture and Orthopedics, Hubei University of Chinese Medicine, Wuhan, Hubei, 430061, China
- Jianghan University Health Science Center, Wuhan, Hubei, 430056, China
- Institute of Acupuncture and Moxibustion, Jianghan University, Wuhan, Hubei, 430056, China
| | - Liang-Yu Zhang
- Digestive Endoscopy Treatment Center, Second Affiliated Hospital, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210017, China
| | - Lei Tang
- Rehabilitation Department, Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430014, China
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Zeng J, Lin Z, Tang J, Chen X, Huang K, Gan F. The role of JAK2/STAT3 pathway in non-cytotoxic concentrations of DON-induced aggravation of inflammatory response in IL-10 deficient RAW264.7 cells. Food Chem Toxicol 2024; 186:114557. [PMID: 38432439 DOI: 10.1016/j.fct.2024.114557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 02/23/2024] [Accepted: 02/29/2024] [Indexed: 03/05/2024]
Abstract
Deoxynivalenol (DON) as a mycotoxin was commonly found in food and cereals which can affect immune function and inflammatory response. The majority of foods contain DON at levels below the official limit. This study aimed to evaluate the effects of non-cytotoxic concentration of DON on inflammation and its mechanisms using the IL-10 gene-silenced RAW264.7 cell model. The results showed that a non-cytotoxic concentration of DON at 25 ng/ml aggravated IL-10 knockdown-induced inflammation, which was manifested by increasing IL-1β and TNF-α mRNA expression, migration and phagocytosis, decreasing IL-10 mRNA expression, and enhancing JAK2/STAT3 phosphorylation. Adding JAK2 inhibitor AG490 attenuated the aggravating effect of DON on IL-10 knockdown-induced inflammation. In conclusion, a non-cytotoxic concentration of DON enhances the inflammatory response through the JAK2/STAT3 signaling pathway when inflammation occurs in the body. These results indicated that non-cytotoxic concentrations of DON could aggravate inflammation when inflammation was induced by IL-10 knockdown, which increases vigilance against DON contamination at low concentration especially when an animal's body has inflammation.
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Affiliation(s)
- Junya Zeng
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Ziman Lin
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Jiangyu Tang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Xingxiang Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Fang Gan
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China.
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Zhang C, Chen F, Wang Y, Zhang K, Yang X, Wang X. Tanshinone IIA protects intestinal epithelial cells from deoxynivalenol-induced pyroptosis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 269:115743. [PMID: 38035519 DOI: 10.1016/j.ecoenv.2023.115743] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/11/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
Deoxynivalenol (DON) is the most common mycotoxin in food and feed, which can cause undesirable effects, including diarrhea, emesis, weight loss, and growth delay in livestock. Intestinal epithelial cells were the main target of DON, which can cause oxidative stress and inflammatory injury. Tanshinone IIA (Tan IIA) is fat-soluble diterpene quinone, which is the most abundant active ingredient in salvia miltiorrhiza plant with antioxidant and anti-inflammatory characteristics. However, it is not clear whether Tan IIA can protect against or inhibit intestinal oxidative stress and inflammatory injury under DON exposure. This study aimed to explore the protective effect of Tan IIA on DON-induced toxicity in porcine jejunum epithelial cells (IPEC-J2). Cells were exposed to 0, 0.5, 1.0, 2.0 µM DON and/or 45 µg/mL TAN ⅡA to detect oxidative stress indicators. inflammatory cytokines, NF-κB expression, NLRP3 inflammasome and pyroptosis-related factors. In this study, DON exposure caused IPEC-J2 cells oxidative stress by elevating ROS and 8-OHdG content, inhibited GSH-Px activity. Furthermore, DON increased pro-inflammatory factor (TNF-α, IL-1β, IL-18 and IL-6) expression and decreased the anti-inflammatory factor (IL-10) expression, causing inflammatory response via triggering NF-κB pathway. Interestingly, above changes were alleviated after Tan IIA treatment. In addition, Tan IIA relieved DON-induced pyroptosis by suppressing the expression of pyroptosis-related factors (NLRP3, Caspase-1, GSDMD, IL-1β, and IL-18). In general, our data suggested that Tan IIA can ameliorate DON-induced intestinal epithelial cells injury associated with suppressing the pyroptosis signaling pathway. Our findings pointed that Tan IIA could be used as the potential therapeutic drugs on DON-induced enterotoxicity.
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Affiliation(s)
- Cong Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Quality and Safety Control of Poultry Products, Ministry of Agriculture and Rural Affairs, China
| | - Fengjuan Chen
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Youshuang Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Kefei Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Xu Yang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China.
| | - Xuebing Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China.
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Zhang T, Bai J, Chen G, Chen Z, Zeng S, Yang Y, Wu Z. 3-Acetyldeoxynivalenol induces apoptosis, barrier dysfunction and endoplasmic reticulum stress by inhibiting mTORC1-dependent autophagy in porcine enterocytes. Chem Biol Interact 2023; 384:110695. [PMID: 37659622 DOI: 10.1016/j.cbi.2023.110695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/12/2023] [Accepted: 08/30/2023] [Indexed: 09/04/2023]
Abstract
3-Acetyldeoxynivalenol (3-Ac-DON), an acetylated form of deoxynivalenol, is widely present in mycotoxin-contaminated food, feed as well as in other natural sources. Ingestion of 3-Ac-DON may result in intestinal dysfunction, leading to gut diseases in humans and animals. Nevertheless, the molecular mechanism of 3-Ac-DON in intestinal epithelial cytotoxicity remains unclear. In this study, intestinal porcine epithelial cell line 1 (IPEC-1) cells were treated with different concentrations of 3-Ac-DON for 12 h or 24 h, respectively. The results showed that 3-Ac-DON caused decreased cell viability, cell cycle arrest in G1 phase and depolarization of mitochondrial membrane potential. Western blotting analysis showed that 3-Ac-DON significantly decreased the expression of tight junction proteins, inhibited autophagy and activated endoplasmic reticulum (ER) stress in IPEC-1 cells (P < 0.05). Further investigation demonstrated that 3-Ac-DON caused apoptosis, ER stress and barrier dysfunction were reversed after co-treatment with the autophagy activator rapamycin (100 nM), indicating that autophagy plays a key role in the process of 3-Ac-DON-induced cell damage. In addition, we demonstrated that 3-Ac-DON inhibits the occurrence of autophagy mediated by mTORC1 protein. In conclusion, our research indicated that the mTORC1 protein and autophagy played a key role in the 3-Ac-DON-induced cytotoxic in IPEC-1 cells, which would provide new therapeutic targets and ideas for 3-Ac-DON-mediated intestinal injury.
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Affiliation(s)
- Tongkun Zhang
- State Key Laboratory of Animal Nutrition and Feeding, Department of Companion Animal Science, China Agricultural University, Beijing, 100193, China
| | - Jun Bai
- State Key Laboratory of Animal Nutrition and Feeding, Department of Companion Animal Science, China Agricultural University, Beijing, 100193, China
| | - Guangye Chen
- SILC Besiness School, Shanghai University, Shanghai, 200444, China
| | - Zhaohui Chen
- State Key Laboratory of Animal Nutrition and Feeding, Department of Companion Animal Science, China Agricultural University, Beijing, 100193, China
| | - Shenming Zeng
- State Key Laboratory of Animal Nutrition and Feeding, Department of Companion Animal Science, China Agricultural University, Beijing, 100193, China
| | - Ying Yang
- State Key Laboratory of Animal Nutrition and Feeding, Department of Companion Animal Science, China Agricultural University, Beijing, 100193, China
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition and Feeding, Department of Companion Animal Science, China Agricultural University, Beijing, 100193, China.
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Wang J, Sijs B, Bakker W, de Haan L, Bouwmeester H. Ribotoxin deoxynivalenol induces taurocholic acid malabsorption in an in vitro human intestinal model. Toxicol Lett 2023; 383:S0378-4274(23)00201-1. [PMID: 37315771 DOI: 10.1016/j.toxlet.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 05/23/2023] [Accepted: 06/10/2023] [Indexed: 06/16/2023]
Abstract
The trichothecene toxin deoxynivalenol (DON) is a ribotoxic mycotoxin that contaminates cereal-based food. DON binds to ribosomes, thereby inhibiting protein translation and activating stress mitogen-activated protein kinases (MAPK). The activation of MAPK induces pro-inflammatory cytokine production. Emerging evidence showed that DON decreased bile acid reabsorption and apical sodium-dependent bile acid transporter (ASBT) expression in Caco-2 cell layers. We hypothesized that the effect of DON on decreased ASBT mRNA expression is regulated via pro-inflammatory cytokines. We observed that MAPK inhibitors prevented DON to induce IL-8 secretion and prevented the DON-induced downregulation of ASBT mRNA expression. However, DON-induced taurocholic acid (TCA) transport reduction was not prevent by the MAPK inhibitors. We next observed a similarity between the activity of the non-inflammatory ribotoxin cycloheximide and DON to decrease TCA transport, which is consistent with their common ability to inhibit protein synthesis. Together, our results suggest that DON-induced TCA malabsorption is regulated by MAPK activation-induced pro-inflammatory cytokine production and protein synthesis inhibition, both of which are initiated by DON binding to the ribosomes which therefore is the molecular initiating event for the adverse outcome of bile acid malabsorption. This study provides insights into the mechanism of ribotoxins-induced bile acid malabsorption in human intestine.
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Affiliation(s)
- Jingxuan Wang
- Division of Toxicology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands.
| | - Bas Sijs
- Division of Toxicology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands
| | - Wouter Bakker
- Division of Toxicology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands
| | - Laura de Haan
- Division of Toxicology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands
| | - Hans Bouwmeester
- Division of Toxicology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, the Netherlands
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Li L, Hong F, Pan S, Ren L, Xiao R, Liu P, Li N, Wang J, Chen Y. "Lollipop" particle counting immunoassay based on antigen-powered CRISPR-Cas12a dual signal amplification for the sensitive detection of deoxynivalenol in the environment and food samples. JOURNAL OF HAZARDOUS MATERIALS 2023; 455:131573. [PMID: 37182461 DOI: 10.1016/j.jhazmat.2023.131573] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/29/2023] [Accepted: 05/02/2023] [Indexed: 05/16/2023]
Abstract
Deoxynivalenol is one of the most widely distributed mycotoxins in cereals and poses tremendous threats to the agricultural environment and public health. Therefore, it is particularly important to develop sensitive and interference-resistant deoxynivalenol analysis methods. Here, we establish a "Lollipop" particle counting immunoassay (LPCI) based on antigen-powered CRISPR-Cas12a dual signal amplification. LPCI achieves high sensitivity and accuracy through antigen-powered CRISPR-Cas dual signal amplification combined with particle counting immunoassay. This strategy not only broadens the applicability of the CRISPR-Cas system in the field of non-nucleic acid target detection; it also improves the sensitivity of particle counting immunoassay. The introduction of a polystyrene "lollipop" immunoassay carrier further enables efficiently simultaneous pre-treatment of multiple samples and overcomes complex matrix interference in real samples. The linear detection range of LPCI for deoxynivalenol was 0.1-500 ng/mL with a detection limit of 0.061 ng/mL. The platform greatly broadens the scope of the CRISPR-Cas sensor for the detection of non-nucleic acid hazards in the environment and food samples.
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Affiliation(s)
- Letian Li
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China
| | - Feng Hong
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China
| | - Shixing Pan
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China
| | - Liangqiong Ren
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China
| | - Ruiheng Xiao
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China
| | - Puyue Liu
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China
| | - Nan Li
- Daye Public Inspection and Test Center, Daye 435100 Hubei, China
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100 Shaanxi, China
| | - Yiping Chen
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan 430070 Hubei, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642 Guangdong, China; Daye Public Inspection and Test Center, Daye 435100 Hubei, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Shenzhen, China.
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7
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Gan F, Lin Z, Tang J, Chen X, Huang K. Deoxynivalenol at No-Observed Adverse-Effect Levels Aggravates DSS-Induced Colitis through the JAK2/STAT3 Signaling Pathway in Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4144-4152. [PMID: 36847760 DOI: 10.1021/acs.jafc.3c00252] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The etiology of inflammatory bowel diseases (IBDs) involves complex genetic and environmental factors such as mycotoxin contamination. Deoxynivalenol (DON), a well-known mycotoxin, contaminates food and feed and can induce intestinal injury and inflammatory response. The dose of DON in many foods is also below the limit, although the dose of DON exceeds the limit. The present study aims to evaluate the effects of the nontoxic dose of DON on colitis induced by dextran sodium sulfate (DSS) and the mechanism in mice. The results showed a nontoxic dose of DON at 50 μg/kg bw per day exacerbated DSS-induced colitis in mice as demonstrated by increased disease activity index, decreased colon length, increased morphological damage, decreased occludin and mucoprotein 2 expression, increased IL-1β and TNF-α expression, and decreased IL-10 expression. DON at 50 μg/kg bw per day enhanced JAK2/STAT3 phosphorylation induced by DSS. Adding JAK2 inhibitor AG490 attenuated the aggravating effects of DON on DSS-induced colitis by reversing the morphological damage, occludin and mucoprotein 2 expression increased, IL-1β and TNF-α expression increased, and IL-10 expression decreased. Taken together, a nontoxic dose of DON could aggravate DSS-induced colitis via the JAK2/STAT3 signaling pathway. This suggests that DON, below the standard limit dose, is also a risk for IBD and may be harmful to the health of humans and animals, which could provide the basis for establishing limits for DON.
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Affiliation(s)
- Fang Gan
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
| | - Ziman Lin
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
| | - Jiangyu Tang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
| | - Xingxiang Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095 Jiangsu Province, China
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Wang M, Li H, Liu S, Ge L, Muhmood A, Liu D, Gan F, Liu Y, Chen X, Huang K. Lipopolysaccharide aggravates canine influenza a (H3N2) virus infection and lung damage via mTOR/autophagy in vivo and in vitro. Food Chem Toxicol 2023; 172:113597. [PMID: 36596444 DOI: 10.1016/j.fct.2022.113597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/02/2023]
Abstract
Influenza A (H3N2) accounts for the majority of influenza worldwide and continues to challenge human health. Disturbance in the gut microbiota caused by many diseases leads to increased production of lipopolysaccharide (LPS), and LPS induces sepsis and conditions associated with local or systemic inflammation. However, to date, little attention has been paid to the potential impact of LPS on influenza A (H3N2) infection and the potential mechanism. Hence, in this study we used canine influenza A (H3N2) virus (CIV) as a model of influenza A virus to investigate the effect of low-dose of LPS on CIV replication and lung damage and explore the underlying mechanism in mice and A549 and HPAEpiC cells. The results showed that LPS (25 μg/kg) increased CIV infection and lung damage in mice, as indicated by pulmonary virus titer, viral NP levels, lung index, and pulmonary histopathology. LPS (1 μg/ml) also increased CIV replication in A549 cells as indicated by the above same parameters. Furthermore, low doses of LPS reduced CIV-induced p-mTOR protein expression and enhanced CIV-induced autophagy-related mRNA/protein expressions in vivo and in vitro. In addition, the use of the mTOR activator, MHY1485, reversed CIV-induced autophagy and CIV replication in A549 and HPAEpiC cells, respectively. siATG5 alleviated CIV replication exacerbated by LPS in the two lines. In conclusion, LPS aggravates CIV infection and lung damage via mTOR/autophagy.
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Affiliation(s)
- Mengmeng Wang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Haolei Li
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Shuiping Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Lei Ge
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Azhar Muhmood
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Dandan Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Fang Gan
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Yunhuan Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Xingxiang Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, Jiangsu Province, China.
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9
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Mao X, Zhang P, Du H, Ge L, Liu S, Huang K, Chen X. The combined effect of deoxynivalenol and Fumonisin B1 on small intestinal inflammation mediated by pyroptosis in vivo and in vitro. Toxicol Lett 2023; 372:25-35. [DOI: 10.1016/j.toxlet.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/05/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
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10
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Zhang C, Zhang KF, Chen FJ, Chen YH, Yang X, Cai ZH, Jiang YB, Wang XB, Zhang GP, Wang FY. Deoxynivalenol triggers porcine intestinal tight junction disorder: Insights from mitochondrial dynamics and mitophagy. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 248:114291. [PMID: 36395652 DOI: 10.1016/j.ecoenv.2022.114291] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/25/2022] [Accepted: 11/11/2022] [Indexed: 06/16/2023]
Abstract
Deoxynivalenol (DON) is universally detected trichothecene in most cereal commodities, which is considered as a major hazardous material for human and animal health. Intestine is the most vulnerable organ with higher concentration of DON than other organs, owing to the first defense barrier function to exogenous substances. However, the underling mechanisms about DON-induced intestinal toxicity remain poorly understood. Here, DON poisoning models of IPEC-J2 cells was established to explore adverse effect and the potential mechanism of DON-induced enterotoxicity. Results showed that DON exposure destroyed IPEC-J2 cells morphology. Results showed that DON exposure destroyed IPEC-J2 cells morphology. Intestinal epithelial barrier injury was caused by DON with increasing LDH release, decreasing cell viability as well decreasing tight junction protein expressions (Occludin, N-Cad, ZO-1, Claudin-1 and Claudin-3). Moreover, DON caused mitochondrial dysfunction by opening mitochondrial permeability transition pore and eliminating mitochondrial membrane potential. DON exposure upregulated protein and mRNA expression of mitochondrial fission factors (Drp1, Fis1, MIEF1 and MFF) and mitophagy factors (PINK1, Parkin and LC3), downregulated mitochondrial fusion factors (Mfn1, Mfn2, except OPA1), resulting in mitochondrial dynamics imbalance and mitophagy. Overall, these findings suggested that DON induced tight junction dysfunction in IPEC-J2 cells was related to mitochondrial dynamics-mediated mitophagy.
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Affiliation(s)
- Cong Zhang
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China; International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, China
| | - Ke-Fei Zhang
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China
| | - Feng-Juan Chen
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China
| | - Yun-He Chen
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China
| | - Xu Yang
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China; International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, China
| | - Zi-Hui Cai
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China
| | - Yi-Bao Jiang
- College of Animal Science and Technology, Henan Agricultural University, 450046, Zhengzhou, Henan, China
| | - Xue-Bing Wang
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China
| | - Gai-Ping Zhang
- College of Veterinary Medicine, Henan Agricultural University, 450046, Zhengzhou, Henan, China; International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou 450046, China
| | - Fang-Yu Wang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China.
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11
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Gaige S, Barbouche R, Barbot M, Boularand S, Dallaporta M, Abysique A, Troadec JD. Constitutively active microglial populations limit anorexia induced by the food contaminant deoxynivalenol. J Neuroinflammation 2022; 19:280. [PMCID: PMC9675145 DOI: 10.1186/s12974-022-02631-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 10/26/2022] [Indexed: 11/21/2022] Open
Abstract
Microglia are involved in neuroinflammatory processes during diverse pathophysiological conditions. To date, the possible contribution of these cells to deoxynivalenol (DON)-induced brain inflammation and anorexia has not yet been evaluated. DON, one of the most abundant trichothecenes found in cereals, has been implicated in mycotoxicosis in both humans and farm animals. DON-induced toxicity is characterized by reduced food intake, weight gain, and immunological effects. We previously showed that exposure to DON induces an inflammatory response within the hypothalamus and dorsal vagal complex (DVC) which contributes to DON-induced anorexia. Here, in response to anorectic DON doses, we reported microglial activation within two circumventricular organs (CVOs), the area postrema (AP) and median eminence (ME) located in the DVC and the hypothalamus, respectively. Interestingly, this microglial activation was observed while DON-induced anorexia was ongoing (i.e., 3 and 6 h after DON administration). Next, we took advantage of pharmacological microglia deletion using PLX3397, a colony-stimulating factor 1 receptor (CSF1R)-inhibitor. Surprisingly, microglia-depleted mice exhibited an increased sensitivity to DON since non-anorectic DON doses reduced food intake in PLX3397-treated mice. Moreover, low DON doses induced c-Fos expression within feeding behavior-associated structures in PLX3397-treated mice but not in control mice. In parallel, we have highlighted heterogeneity in the phenotype of microglial cells present in and around the AP and ME of control animals. In these areas, microglial subpopulations expressed IBA1, TMEM119, CD11b and CD68 to varying degrees. In addition, a CD68 positive subpopulation showed, under resting conditions, a noticeable phagocytotic/endocytotic activity. We observed that DON strongly reduced CD68 in the hypothalamus and DVC. Finally, inactivation of constitutively active microglia by intraperitoneal administration of minocycline resulted in anorexia with a DON dose ineffective in control mice. Taken together, these results strongly suggest that various populations of microglial cells residing in and around the CVOs are maintained in a functionally active state even under physiological conditions. We propose that these microglial cell populations are attempting to protect the brain parenchyma from hazardous molecules coming from the blood. This study could contribute to a better understanding of how microglia respond to environmental contaminants.
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Affiliation(s)
- Stéphanie Gaige
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Laboratoire de Neurosciences Cognitives, UMR 7291, 3 Place Victor Hugo, 13331 Marseille, France
| | - Rym Barbouche
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Laboratoire de Neurosciences Cognitives, UMR 7291, 3 Place Victor Hugo, 13331 Marseille, France
| | - Manon Barbot
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Laboratoire de Neurosciences Cognitives, UMR 7291, 3 Place Victor Hugo, 13331 Marseille, France
| | - Sarah Boularand
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Centrale Marseille, FSCM (FR1739), PRATIM, 13397 Marseille, France
| | - Michel Dallaporta
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Laboratoire de Neurosciences Cognitives, UMR 7291, 3 Place Victor Hugo, 13331 Marseille, France
| | - Anne Abysique
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Laboratoire de Neurosciences Cognitives, UMR 7291, 3 Place Victor Hugo, 13331 Marseille, France
| | - Jean-Denis Troadec
- grid.5399.60000 0001 2176 4817Aix-Marseille University, CNRS, Laboratoire de Neurosciences Cognitives, UMR 7291, 3 Place Victor Hugo, 13331 Marseille, France
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12
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Zearalenone Promotes LPS-Induced Oxidative Stress, Endoplasmic Reticulum Stress, and Accelerates Bovine Mammary Epithelial Cell Apoptosis. Int J Mol Sci 2022; 23:ijms231810925. [PMID: 36142835 PMCID: PMC9500836 DOI: 10.3390/ijms231810925] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 11/29/2022] Open
Abstract
Both zearalenone (ZEA) and lipopolysaccharide (LPS) can induce oxidative stress, and even apoptosis in bovine mammary epithelial cells (MAC-T), but not much attention has been given to the synergistic effect of ZEA and LPS. In this study, we treated MAC-T cells with different concentrations of LPS (1, 10, 50, and 100 μg/mL) and ZEA (5, 15, and 30 μM) to induce cell damage. Previous results show that MAC-T cell viability decreases with increasing LPS concentration. Meanwhile, 1 µg/mL LPS and ZEA were selected for combined treatment in subsequent studies. It was found that co-treatment with ZEA and LPS increases the accumulation of reactive oxygen species (ROS) and malondialdehyde (MDA), decreases mitochondrial membrane potential (MMP), and superoxide dismutase (SOD), and reduces glutathione (GSH). ZEA and LPS are found to activate endoplasmic reticulum (ER) stress by increasing the expression of glucose-regulated protein 78 kDa (GRP78), activating transcription factor 6 (ATF6) and C/EBP homologous protein (CHOP). It increases cell apoptosis by suppressing the expression of the anti-apoptotic protein B-cell lymphoma-2 (Bcl-2), indicated by up-regulation of Bcl2-associated X protein (Bax) and Cysteinyl aspartate-specific proteinases 3 (caspase-3) expression. The above results suggest that the synergistic effect of ZEA and LPS aggravate cytotoxicity.
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13
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Schäfer TV, Vakunenkova OA, Ivnitsky JJ, Golovko AI. Gut Barrier in Critical States of the Body. BIOLOGY BULLETIN REVIEWS 2022. [PMCID: PMC9297268 DOI: 10.1134/s2079086422040077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The intestinal barrier (IB) is a system of diffusion barriers separating the intestinal chyme and blood. The aim of the review is to identify the role of IB dysfunction in the formation of critical states of the body and to substantiate ways to prevent these states. Toxic substances produced by normal intestinal microflora are characterized. The involvement of endotoxin and ammonia in the pathogenesis of sepsis, acute circulatory disorders, secondary acute pulmonary lesions, and acute cerebral insufficiency is shown. Approaches to protect the IB in critical states of the body are proposed.
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Affiliation(s)
- T. V. Schäfer
- State Scientific Research and Testing Institute of Military Medicine, St. Petersburg, Russia
| | - O. A. Vakunenkova
- Golikov Scientific and Clinical Center of Toxicology, St. Petersburg, Russia
| | - Ju. Ju. Ivnitsky
- Golikov Scientific and Clinical Center of Toxicology, St. Petersburg, Russia
| | - A. I. Golovko
- Golikov Scientific and Clinical Center of Toxicology, St. Petersburg, Russia
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14
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Mao X, Liu S, Ge L, Du H, Yue D, Hou L, Huang K, Chen X. mTOR-Mediated Autophagy Regulates Fumonisin B 1-Induced Intestinal Inflammation via Pyroptosis In Vivo and In Vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:9187-9200. [PMID: 35830273 DOI: 10.1021/acs.jafc.2c03025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fumonisin B1 (FB1) is a fungal metabolite, which has an incremental detection rate in grains and feed worldwide. The nucleotide-binding oligomerization domain-like pyrin domain containing protein 3 (NLRP3) inflammasome is a critical element in pyroptosis activation, which participates in regulating enteritis. Meanwhile, autophagy is also engaged in intestinal inflammation. However, the function of pyroptosis and autophagy in FB1-mediated enterotoxicity remains unclear. In this study, we explored the effects of FB1 on enteritis and the underlying mechanism in vivo and in vitro. Our data showed that FB1 exposure damaged the intestinal epithelium and promoted the secretion of inflammatory cytokines. Meanwhile, FB1 exposure significantly upregulated the expression of pyroptosis-related genes. Then, MCC950, an inhibitor of NLRP3, significantly blocked FB1-induced pyroptosis in IPEC-J2 cells. In addition, FB1 treatment elevated the levels of autophagy. Moreover, the phosphorylation of the mammalian target of rapamycin (mTOR), an upstream protein of the autophagy pathway, was inhibited by FB1 exposure. Notably, rapamycin, an inhibitor of mTOR, instead of MHY1485, an agonist of mTOR, could ameliorate FB1-induced intestinal inflammatory injury and inhibit the upregulation of pyroptosis-related genes. In summary, we demonstrated that autophagy exhibited a protective effect against NLRP3 inflammasome-dependent pyroptosis on FB1-induced enteritis. Our data clarify a favorable protective role for the activation of autophagy in FB1 poisoning.
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Affiliation(s)
- Xinru Mao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Shuiping Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Lei Ge
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Heng Du
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Dongmei Yue
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Lili Hou
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
| | - Xingxiang Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China
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15
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Ivnitsky JJ, Schäfer TV, Rejniuk VL, Vakunenkova OA. Secondary Dysfunction of the Intestinal Barrier in the Pathogenesis of Complications of Acute Poisoning. J EVOL BIOCHEM PHYS+ 2022; 58:1075-1098. [PMID: 36061072 PMCID: PMC9420239 DOI: 10.1134/s0022093022040123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 11/22/2022]
Abstract
The last decade has been marked by an exponential increase
in the number of publications on the physiological role of the normal
human gut microbiota. The idea of a symbiotic relationship between
the human organism and normal microbiota of its gastrointestinal
tract has been firmly established as an integral part of the current
biomedical paradigm. However, the type of this symbiosis varies
from mutualism to parasitism and depends on the functional state
of the host organism. Damage caused to the organism by external
agents can lead to the emergence of conditionally pathogenic properties
in the normal gut microbiota, mediated by humoral factors and affecting
the outcome of exogenous exposure. Among the substances produced
by symbiotic microbiota, there are an indefinite number of compounds
with systemic toxicity. Some occur in the intestinal chyme in potentially
lethal amounts in the case they enter the bloodstream quickly. The quick
entry of potential toxicants is prevented by the intestinal barrier
(IB), a set of structural elements separating the intestinal chyme
from the blood. Hypothetically, severe damage to the IB caused by
exogenous toxicants can trigger a leakage and subsequent systemic
redistribution of toxic substances of bacterial origin. Until recently,
the impact of such a redistribution on the outcome of acute exogenous
poisoning remained outside the view of toxicology. The present review
addresses causal relationships between the secondary dysfunction
of the IB and complications of acute poisoning. We characterize
acute systemic toxicity of such waste products of the normal gut microflora
as ammonia and endotoxins, and demonstrate their involvement in
the formation of such complications of acute poisoning as shock,
sepsis, cerebral insufficiency and secondary lung injuries. The
principles of assessing the functional state of the IB and the approaches
to its protection in acute poisoning are briefly considered.
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Affiliation(s)
- Ju. Ju. Ivnitsky
- Golikov Research Clinical Center of Toxicology, Federal Medical Biological Agency, St. Petersburg, Russia
| | - T. V. Schäfer
- State Scientific Research Test Institute of Military Medicine, Ministry of Defense of the Russian Federation, St. Petersburg, Russia
| | - V. L. Rejniuk
- Golikov Research Clinical Center of Toxicology, Federal Medical Biological Agency, St. Petersburg, Russia
| | - O. A. Vakunenkova
- Golikov Research Clinical Center of Toxicology, Federal Medical Biological Agency, St. Petersburg, Russia
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16
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Ge L, Liu D, Mao X, Liu S, Guo J, Hou L, Chen X, Huang K. Low Dose of Deoxynivalenol Aggravates Intestinal Inflammation and Barrier Dysfunction Induced by Enterotoxigenic Escherichia coli Infection through Activating Macroautophagy/NLRP3 Inflammasomes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3009-3022. [PMID: 35201764 DOI: 10.1021/acs.jafc.1c07834] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The toxicity of deoxynivalenol (DON) in healthy humans and animals has been extensively studied. However, whether the natural-low-dose DON is scatheless under unhealthy conditions, especially intestinal injury, is unknown. Infection of enterotoxigenic Escherichia coli (ETEC) is a classical intestinal injury model. In this study, we explored the effects of low-dose DON on intestinal injury induced by the ETEC infection and the underlying mechanism in piglets, mice, and IPEC-J2 monolayer cells. Results showed that significant growth slowdown, severe diarrhea, and intestinal damage, bacterial multiplication, and translocation were observed in the experimental group (low-dose DON, 0.75 mg/kg in feed for piglets, and 1 mg/kg body weight for mice, combined with the ETEC infection). Meanwhile, more aggressive intestinal inflammation and barrier dysfunction were observed in animals and IPEC-J2 monolayer cells. Higher expression levels of NLRP3 inflammasome and LC3B were observed in jejunum and IPEC-J2 in the experimental group. After treatment with NLRP3 or caspase1 inhibitors, excessive intestinal inflammation rather than barrier dysfunction in the experimental group was limited. CRISPR-Cas9-mediated knockout of LC3B alleviated intestinal inflammation and barrier dysfunction and also inhibited NLRP3 inflammasome. In conclusion, a low dose of DON aggravates intestinal inflammation and barrier dysfunction induced by the ETEC infection by activating macroautophagy and NLRP3 inflammasome.
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Affiliation(s)
- Lei Ge
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Dandan Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Xinru Mao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Shuiping Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Junyan Guo
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Lili Hou
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Xingxiang Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
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17
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Liu S, Mao X, Ge L, Hou L, Le G, Gan F, Wen L, Huang K. Phenethyl isothiocyanate as an anti-nutritional factor attenuates deoxynivalenol-induced IPEC-J2 cell injury through inhibiting ROS-mediated autophagy. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2022; 8:300-309. [PMID: 35024467 PMCID: PMC8717381 DOI: 10.1016/j.aninu.2021.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 08/21/2021] [Accepted: 09/09/2021] [Indexed: 11/16/2022]
Abstract
Deoxynivalenol (DON) is considered to be the most harmful mycotoxin that affects the intestinal health of animals and humans. Phenethyl isothiocyanate (PEITC) in feedstuff is an anti-nutritional factor and impairs nutrient digestion and absorption in the animal intestinal. In the current study, we aimed to explore the effects of PEITC on DON-induced apoptosis, intestinal tight junction disorder, and its potential molecular mechanism in the porcine jejunum epithelial cell line (IPEC-J2). Our results indicated that PEITC treatment markedly alleviated DON-induced cytotoxicity, decreasing the apoptotic cell percentage and pro-apoptotic mRNA/protein levels, and increasing zonula occludens-1 (ZO-1), occludin and claudin-1 mRNA/protein expression. Meanwhile, PEITC treatment ameliorated DON-induced an increase of the inducible nitric oxide synthase (iNOS) and cyclooxygenase 2 (COX-2) mRNA levels and intracellular reactive oxygen species (ROS) level, and a decrease of glutathione peroxidase 1 (GPx1), superoxide dismutase 2 (SOD2), catalase (CAT) and heme oxygenase 1 (HO-1) mRNA levels. Additionally, PEITC treatment significantly down-regulated autophagy-related protein 5 (ATG5), beclin-1 and microtubule-associated protein 1 light chain 3B (LC3-Ⅱ) mRNA/protein levels, decreased the number of green fluorescent protein-microtubule-associated protein 1 light-chain 3 (GFP-LC3) puncta and phosphatidylinositol 3 kinase (PI3K) protein expression, and up-regulated phospho-protein kinase B (p-Akt) and phospho-mammalian target of rapamycin (p-mTOR) protein expression against DON. However, the activation of autophagy by rapamycin, an autophagy agonist, abolished the protective effects of PEITC against DON-induced cytotoxicity, apoptosis and intestinal tight junction disorder. Collectively, PEITC could confer protection against DON-induced porcine intestinal epithelial cell injury by suppressing ROS-mediated autophagy.
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Affiliation(s)
- Shuiping Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xinru Mao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Lei Ge
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Lili Hou
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guannan Le
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fang Gan
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Lixin Wen
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, China
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls, Nanjing Agricultural University, Nanjing, 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
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18
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Sun Y, Huang K, Long M, Yang S, Zhang Y. An update on immunotoxicity and mechanisms of action of six environmental mycotoxins. Food Chem Toxicol 2022; 163:112895. [PMID: 35219766 DOI: 10.1016/j.fct.2022.112895] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 01/19/2023]
Abstract
Paradoxically, aflatoxin B1 (AFB1), ochratoxin A (OTA), deoxynivalenol (DON), T-2 toxin (T-2), fumonisin B1 (FB1), and zearalenone (ZEA) have both immunosuppressive and immunostimulatory effects. The immunotoxicity of six mycotoxins exhibits immune suppression or stimulation, which depends on multiple factors. Low doses of mycotoxins can induce an inflammatory response, but elevated levels of ones can induce immunosuppression; long-term instead of short-term mycotoxin exposure is immunosuppressive. These six mycotoxins play anti-inflammatory roles when the immunologic stimulants are present but pro-inflammatory roles when the immunologic stimulants are absent. Pigs are most sensitive animals to mycotoxins, followed by humans and poultry, rodent, and marine organism, and ruminants are the least susceptible. Female animals are more susceptible to mycotoxins than male ones. The immunosuppresion mechanism of mycotoxins are mainly in, oxidative stress, apoptosis and autophagy of immune cells, as well as inhibits the immunity-related signal pathways; and AFB1, OTA, DON, and T-2 induce immunostimulation via directly activating the TLRs/NF-κB pathway and other crossing pathways including cyclooxygenase-2 (COX-2) and mitogen-activated protein kinase (MAPK). This review strongly dispels the viewpoint that "immunotoxicity is equivalent to immunosuppression", clearly demonstrates the mechanistic pathway and how it contributes to immunosuppression or immunostimulation, thereby providing reliable references for future studies.
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Affiliation(s)
- Yuhang Sun
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China.
| | - Kehe Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Miao Long
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China.
| | - Shuhua Yang
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China.
| | - Ying Zhang
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, China.
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Staphylococcal Enterotoxin A Induces Intestinal Barrier Dysfunction and Activates NLRP3 Inflammasome via NF-κB/MAPK Signaling Pathways in Mice. Toxins (Basel) 2022; 14:toxins14010029. [PMID: 35051006 PMCID: PMC8779132 DOI: 10.3390/toxins14010029] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/25/2021] [Accepted: 12/28/2021] [Indexed: 02/07/2023] Open
Abstract
Staphylococcal enterotoxin A (SEA), the toxin protein secreted by Staphylococcus aureus, can cause staphylococcal food poisoning outbreaks and seriously threaten global public health. However, little is known about the pathogenesis of SEA in staphylococcal foodborne diseases. In this study, the effect of SEA on intestinal barrier injury and NLRP3 inflammasome activation was investigated by exposing BALB/c mice to SEA with increasing doses and a potential toxic mechanism was elucidated. Our findings suggested that SEA exposure provoked villi injury and suppressed the expression of ZO-1 and occludin proteins, thereby inducing intestinal barrier dysfunction and small intestinal injury in mice. Concurrently, SEA significantly up-regulated the expression of NLRP3 inflammasome-associated proteins and triggered the mitogen-activated protein kinase (MAPK) and nuclear factor kappa-B (NF-κB) signaling pathways in jejunum tissues. Notably, selective inhibitors of MAPKs and NF-κB p65 ameliorated the activation of NLRP3 inflammasome stimulated by SEA, which further indicated that SEA could activate NLRP3 inflammasome through NF-κB/MAPK pathways. In summary, SEA was first confirmed to induce intestinal barrier dysfunction and activate NLRP3 inflammasome via NF-κB/MAPK signaling pathways. These findings will contribute to a more comprehensive understanding of the pathogenesis of SEA and related drug-screening for the treatment and prevention of bacteriotoxin-caused foodborne diseases via targeting specific pathways.
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Melatonin Ameliorates LPS-Induced Testicular Nitro-oxidative Stress (iNOS/TNFα) and Inflammation (NF-kB/COX-2) via Modulation of SIRT-1. Reprod Sci 2021; 28:3417-3430. [PMID: 33929710 DOI: 10.1007/s43032-021-00597-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 04/22/2021] [Indexed: 01/08/2023]
Abstract
Lipopolysaccharide (LPS) - an endotoxin that is being extensively used in laboratory to mimic microbial infection that adversely affects male fertility. This study investigated the protective effects of melatonin on LPS-induced testicular nitro-oxidative stress, inflammation, and associated damages in the testes of male golden hamsters, Mesocricetus auratus. Hamsters were administered with melatonin and LPS for 7 days. Testes of LPS treated hamsters showed degenerative changes (appearance of vacuoles, exfoliation, and depletion of germ cells in the seminiferous tubules), adverse effects on spermatogenesis (sperm count and viability), and steroidogenesis (declined serum and testicular testosterone). Furthermore, LPS treatment decreased melatonin content, melatonin receptor (MT1), and antioxidant potential (catalase and SOD), and simultaneously increased nitro-oxidative stress (CRP, nitrate, TNFα). LPS upregulated NF-kB, COX-2, and iNOS expressions to increase testicular inflammatory load that resulted in the decrease of germ cell proliferation and survival, thus culminating into germ cell apoptosis as indicated by AO-EB staining and caspase-3 expression. Administration of melatonin with LPS showed improved testicular histoarchitecture, sperm parameters, and testosterone level. Melatonin increased testicular antioxidant status (SOD, catalase) to counteract the LPS-induced testicular ROS and thus reduced testicular nitro-oxidative stress. Furthermore, melatonin treatment upregulated testicular SIRT-1 expression to inhibit LPS-induced inflammatory proteins, i.e., NF-kB/COX-2/iNOS expression. The rescue effect of melatonin was further supported by increased germ cell survival (Bcl-2), proliferation (PCNA), and declined apoptosis (caspase-3). In conclusion, our result demonstrated that melatonin rescued testes from LPS-induced testicular nitro-oxidative stress, inflammation, and associated damages by upregulation of SIRT-1.
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Ochratoxin A induces nephrotoxicity in vitro and in vivo via pyroptosis. Arch Toxicol 2021; 95:1489-1502. [PMID: 33543323 DOI: 10.1007/s00204-021-02993-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 01/28/2021] [Indexed: 01/12/2023]
Abstract
Ochratoxin A (OTA), a prevalent nephrotoxic mycotoxin contaminant in food and feedstuff, has been reported to induce renal injury. To disclose the nephrotoxicity of continuous administration of OTA and to investigate potential mechanisms related to pyroptosis, male C57BL/6 mice were intraperitoneally injected with 1.0 and 2.0 mg/kg B.W. OTA every other day for 14 days. At 2.0 mg/kg B.W. OTA administration significantly increased histological injury and renal fibrosis molecules (α-SMA, Vimentin, TGF-β) and activated the NOD-like receptor protein 3 (NLRP3) inflammasome and induced pyroptosis compared with control. In the in vitro tests, Madin-Darby canine kidney (MDCK) epithelial cells were exposed to 0-4.0 μg/ml OTA for 24 h in serum-free medium. Data showed that OTA dose-dependently affected cell viability and significantly up-regulated renal fibrosis genes (α-SMA, Vimentin, TGF-β). 2.0 μg/ml OTA significantly induced NLRP3 inflammasome activation and caspase-1-dependent pyroptosis, increasing the expression and secretion of pro-inflammatory cytokines (IL-6, TNF-α) and pyroptosis-related genes (GSDMD, IL-1β, IL-18) in MDCK cells. These outcomes were significantly abrogated after inhibiting NLRP3 activation with inhibitor MCC950 and silencing NLRP3 with small interfering RNA (siRNA). Furthermore, knockdown of caspase-1 also ameliorated OTA-induced renal fibrosis via the inhibition of pyroptosis. Collectively, the chosen doses of OTA-triggered nephrotoxicity through NLRP3 inflammasome activation and caspase-1-dependent pyroptosis both in vitro and in vivo.
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