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Shan Q, Wang X, Yang H, Zhu Y, Wang J, Yang G. Bacillus cereus CwpFM induces colonic tissue damage and inflammatory responses through oxidative stress and the NLRP3/NF-κB pathway. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 933:173079. [PMID: 38735331 DOI: 10.1016/j.scitotenv.2024.173079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/30/2024] [Accepted: 05/07/2024] [Indexed: 05/14/2024]
Abstract
Bacillus cereus (B. cereus) from cow milk poses a threat to public health, causing food poisoning and gastrointestinal disorders in humans. We identified CwpFM, an enterotoxin from B. cereus, caused oxidative stress and inflammatory responses in mouse colon and colonic epithelial cells. Colon proteomics revealed that CwpFM elevated proteins associated with inflammation and oxidative stress. Notably, CwpFM induced activation of the NLRP3/NF-κB signaling, but suppressed antioxidant NFE2L2/HO-1 expression in the intestine and epithelial cells. Consistently, CwpFM exposure led to cytotoxicity and ROS accumulation in Caco-2 cells in a dose-dependent manner. Further, NAC (ROS inhibitor) treatment abolished NLRP3/NF-κB activation due to CwpFM. Moreover, overexpression of Nfe2l2 or activation of NFE2L2 by NK-252 reduced ROS production and inhibited activation of the NLRP3/NF-κB pathway. Inhibition of NF-κB by ADPC and/or suppression of NLRP3 by MCC950 attenuated CwpFM-induced inflammatory responses in Caco-2 cells. Collectively, CwpFM induced oxidative stress and NLRP3/NF-κB activation by inhibiting the NFE2L2/HO-1 signaling and ROS accumulation, leading to the development of intestinal inflammation. Our data elucidate the role of oxidative stress and innate immunity in CwpFM enterotoxicity and contribute to developing diagnostic and therapeutic products for B. cereus-related food safety issues.
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Affiliation(s)
- Qiang Shan
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Sanya Institute of China Agricultural University, Sanya 572025, China
| | - Xue Wang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Sanya Institute of China Agricultural University, Sanya 572025, China
| | - Hao Yang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Sanya Institute of China Agricultural University, Sanya 572025, China
| | - Yaohong Zhu
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Sanya Institute of China Agricultural University, Sanya 572025, China
| | - Jiufeng Wang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Sanya Institute of China Agricultural University, Sanya 572025, China.
| | - Guiyan Yang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
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2
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Mansoure AN, Elshal M, Helal MG. Renoprotective effect of diacetylrhein on diclofenac-induced acute kidney injury in rats via modulating Nrf2/NF-κB/NLRP3/GSDMD signaling pathways. Food Chem Toxicol 2024; 187:114637. [PMID: 38582345 DOI: 10.1016/j.fct.2024.114637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/27/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
Diclofenac (DF)-induced acute kidney injury (AKI) is characterized by glomerular dysfunction and acute tubular necrosis. Due to limited treatment approaches, effective and safe drug therapy to protect against such AKI is still needed. Diacetylrhein (DAR), an anthraquinone derivative, has different antioxidant and anti-inflammatory properties. Therefore, the aim of the current study was to investigate the renoprotective effect of DAR on DF-induced AKI while elucidating the potential underlying mechanism. Our results showed that DAR (50 and 100 mg/kg) markedly abrogated DF-induced kidney dysfunction decreasing SCr, BUN, serum NGAL, and serum KIM1 levels. Moreover, DAR treatment remarkably maintained renal redox balance and reduced the levels of pro-inflammatory biomarkers in the kidney. Mechanistically, DAR boosted Nrf2/HO-1 antioxidant and anti-inflammatory response in the kidney while suppressing renal TLR4/NF-κB and NLRP3/caspase-1 inflammatory signaling pathways. In addition, DAR markedly inhibited renal pyroptosis via targeting of GSDMD activation. Collectively, this study confirmed that the interplay between Nrf2/HO-1 and TLR4/NF-κB/NLRP3/Caspase-1 signaling pathways and pyroptotic cell death mediates DF-induced AKI and reported that DAR has a dose-dependent renoprotective effect on DF-induced AKI in rats. This effect is due to powerful antioxidant, anti-inflammatory, and anti-pyroptotic activities that could provide a promising treatment approach to protect against DF-induced AKI.
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Affiliation(s)
| | - Mahmoud Elshal
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Egypt.
| | - Manar G Helal
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Egypt
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3
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Guo C, Yue Y, Wang B, Chen S, Li D, Zhen F, Liu L, Zhu H, Xie M. Anemoside B4 alleviates arthritis pain via suppressing ferroptosis-mediated inflammation. J Cell Mol Med 2024; 28:e18136. [PMID: 38334255 PMCID: PMC10853948 DOI: 10.1111/jcmm.18136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 11/02/2023] [Accepted: 12/20/2023] [Indexed: 02/10/2024] Open
Abstract
Chronic pain is the key manifestations of rheumatoid arthritis. Neuroinflammation in the spinal cord drives central sensitization and chronic pain. Ferroptosis has potentially important roles in the occurrence of neuroinflammation and chronic pain. In the current study, mouse model of collagen-induced arthritis was established by intradermal injection of type II collagen in complete Freund's adjuvant (CFA) solution. CFA inducement resulted in swollen paw and ankle, mechanical and spontaneous pain, and impaired motor coordination. The spinal inflammation was triggered, astrocytes were activated, and increased NLRP3-mediated inflammatory signal was found in CFA spinal cord. Oxidative stress and ferroptosis in the spinal cord were manifested. Meanwhile, enhancive spinal GSK-3β activity and abnormal phosphorylated Drp1 were observed. To investigate the potential therapeutic options for arthritic pain, mice were intraperitoneally injected with AB4 for three consecutive days. AB4 treatment reduced pain sensitivity and increased the motor coordination. In the spinal cord, AB4 treatment inhibited NLRP3 inflammasome-mediated inflammatory response, increased antioxidation, decreased mitochondrial reactive oxygen species and ferroptosis. Furthermore, AB4 decreased GSK-3β activity by binding with GSK-3β through five electrovalent bonds. Our findings indicated that AB treatment relieves arthritis pain by inhibiting GSK-3β activation, increasing antioxidant capability, reducing Drp1-mediated mitochondrial dysfunction and suppressing neuroinflammation.
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Affiliation(s)
- Chenlu Guo
- School of PharmacyHubei University of Science and TechnologyXianningChina
| | - Yuanfen Yue
- Department of ObstetricsXianning Central Hospital, First Affiliated Hospital of Hubei University of Science and TechnologyXianningChina
| | - Bojun Wang
- Hubei Key Laboratory of Diabetes and Angiopathy, School of Basic Medical Sciences, Xianning Medical CollegeHubei University of Science and TechnologyXianningChina
| | - Shaohui Chen
- Hubei Key Laboratory of Diabetes and Angiopathy, School of Basic Medical Sciences, Xianning Medical CollegeHubei University of Science and TechnologyXianningChina
| | - Dai Li
- Hubei Key Laboratory of Diabetes and Angiopathy, School of Basic Medical Sciences, Xianning Medical CollegeHubei University of Science and TechnologyXianningChina
| | - Fangshou Zhen
- Department of PharmacyMatang Hospital of Traditional Chinese MedicineXianningChina
| | - Ling Liu
- Hubei Key Laboratory of Diabetes and Angiopathy, School of Basic Medical Sciences, Xianning Medical CollegeHubei University of Science and TechnologyXianningChina
| | - Haili Zhu
- Hubei Key Laboratory of Diabetes and Angiopathy, School of Basic Medical Sciences, Xianning Medical CollegeHubei University of Science and TechnologyXianningChina
| | - Min Xie
- Hubei Key Laboratory of Diabetes and Angiopathy, School of Basic Medical Sciences, Xianning Medical CollegeHubei University of Science and TechnologyXianningChina
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4
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Khan S, Wang T, Cobo ER, Liang B, Khan MA, Xu M, Qu W, Gao J, Barkema HW, Kastelic JP, Liu G, Han B. Antioxidative Sirt1 and the Keap1-Nrf2 Signaling Pathway Impair Inflammation and Positively Regulate Autophagy in Murine Mammary Epithelial Cells or Mammary Glands Infected with Streptococcus uberis. Antioxidants (Basel) 2024; 13:171. [PMID: 38397769 PMCID: PMC10886112 DOI: 10.3390/antiox13020171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/19/2024] [Accepted: 01/26/2024] [Indexed: 02/25/2024] Open
Abstract
Streptococcus uberis mastitis in cattle infects mammary epithelial cells. Although oxidative responses often remove intracellular microbes, S. uberis survives, but the mechanisms are not well understood. Herein, we aimed to elucidate antioxidative mechanisms during pathogenesis of S. uberis after isolation from clinical bovine mastitis milk samples. S. uberis's in vitro pathomorphology, oxidative stress biological activities, transcription of antioxidative factors, inflammatory response cytokines, autophagosome and autophagy functions were evaluated, and in vivo S. uberis was injected into the fourth mammary gland nipple of each mouse to assess the infectiousness of S. uberis potential molecular mechanisms. The results showed that infection with S. uberis induced early oxidative stress and increased reactive oxygen species (ROS). However, over time, ROS concentrations decreased due to increased antioxidative activity, including total superoxide dismutase (T-SOD) and malondialdehyde (MDA) enzymes, plus transcription of antioxidative factors (Sirt1, Keap1, Nrf2, HO-1). Treatment with a ROS scavenger (N-acetyl cysteine, NAC) before infection with S. uberis reduced antioxidative responses and the inflammatory response, including the cytokines IL-6 and TNF-α, and the formation of the Atg5-LC3II/LC3I autophagosome. Synthesis of antioxidants determined autophagy functions, with Sirt1/Nrf2 activating autophagy in the presence of S. uberis. This study demonstrated the evasive mechanisms of S. uberis in mastitis, including suppressing inflammatory and ROS defenses by stimulating antioxidative pathways.
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Affiliation(s)
- Sohrab Khan
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Tian Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Eduardo R. Cobo
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (E.R.C.); (H.W.B.); (J.P.K.)
| | - Bingchun Liang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Muhammad Asfandyar Khan
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Maolin Xu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Weijie Qu
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China;
| | - Jian Gao
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Herman W. Barkema
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (E.R.C.); (H.W.B.); (J.P.K.)
| | - John P. Kastelic
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (E.R.C.); (H.W.B.); (J.P.K.)
| | - Gang Liu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
| | - Bo Han
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (S.K.); (T.W.); (B.L.); (M.A.K.); (M.X.); (J.G.)
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Li K, Ran X, Zeng Y, Li S, Hu G, Wang X, Li Y, Yang Z, Liu J, Fu S. Maslinic acid alleviates LPS-induced mice mastitis by inhibiting inflammatory response, maintaining the integrity of the blood-milk barrier and regulating intestinal flora. Int Immunopharmacol 2023; 122:110551. [PMID: 37406397 DOI: 10.1016/j.intimp.2023.110551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 07/07/2023]
Abstract
Mastitis occurs frequently in breastfeeding women and not only affects the women's health but also hinders breastfeeding. Maslinic acid is a type of pentacyclic triterpenoid widely found in olives that has good anti-inflammatory activity. This study aims to discuss the protective function of maslinic acid against mastitis and its underlying mechanism. For this, mice models of mastitis were established using lipopolysaccharide (LPS). The results revealed that maslinic acid reduced the pathological lesions in the mammary gland. In addition, it reduced the generation of pro-inflammatory factors and enzymes (IL-6, IL-1β, TNF-α, iNOS, and COX2) in both mice mammary tissue and mammary epithelial cells. The high-throughput 16S rDNA sequencing of intestinal flora showed that in mice with mastitis, maslinic acid treatment altered β-diversity and regulated microbial structure by increasing the abundance of probiotics such as Enterobacteriaceae and downregulating harmful bacteria such as Streptococcaceae. In addition, maslinic acid protected the blood-milk barrier by maintaining tight-junction protein expression. Furthermore, maslinic acid downregulated mammary inflammation by inhibiting the activation of NLRP3 inflammasome, AKT/NF-κB, and MAPK signaling pathways. Thus, in a mice model of LPS-induced mastitis, maslinic acid can inhibit the inflammatory response, protect the blood-milk barrier, and regulate the constitution of intestinal flora.
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Affiliation(s)
- Kefei Li
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Xin Ran
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Yiruo Zeng
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Shubo Li
- Liaoning Center for Animal Disease Control and Prevention, Liaoning Agricultural Development Service Center, Shenyang 110164, China
| | - Guiqiu Hu
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Xiaoxuan Wang
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Ying Li
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Zhanqing Yang
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Juxiong Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Shoupeng Fu
- Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, Jilin, China; College of Veterinary Medicine, Jilin University, Changchun, Jilin, China.
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6
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Yadavalli CS, Upparahalli Venkateshaiah S, Kumar S, Kandikattu HK, Oruganti L, Kathera CS, Mishra A. Allergen-induced NLRP3/caspase1/IL-18 signaling initiate eosinophilic esophagitis and respective inhibitors protect disease pathogenesis. Commun Biol 2023; 6:763. [PMID: 37524769 PMCID: PMC10390481 DOI: 10.1038/s42003-023-05130-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 07/10/2023] [Indexed: 08/02/2023] Open
Abstract
The current report describes a stepwise mechanistic pathway of NLRP3/caspase1/IL-18-regulated immune responses operational in eosinophilic esophagitis (EoE). We show that esophageal epithelial cells and macrophage-derived NLRP3 regulated IL-18 initiate the disease and induced IL-5 facilitates eosinophil growth and survival. We also found that A. fumigatus-exposed IL-18-/- mice or IL-18-neutralized mice are protected from EoE induction. Most importantly, we present that intravascular rIL-18 delivery to ΔdblGATA mice and CD2-IL-5 mice show the development of EoE characteristics feature like degranulated and intraepithelial eosinophils, basal cell hyperplasia, remodeling and fibrosis. Similarly, we show an induced NLRP3-caspase1-regulated IL-18 pathway is also operational in human EoE. Lastly, we present the evidence that inhibitors of NLRP3 and caspase-1 (MCC950, BHB, and VX-765) protect A. fumigatus- and corn-extract-induced EoE pathogenesis. In conclusion, the current study provides a new understanding by implicating NLRP3/caspase1-regulated IL-18 pathway in EoE pathogenesis. The study has the clinical significance and novel therapeutic strategy, which depletes only IL-18-responsive pathogenic eosinophils, not naïve IL-5-generated eosinophils critical for maintaining innate immunity.
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Affiliation(s)
- Chandra Sekhar Yadavalli
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA
| | - Sathisha Upparahalli Venkateshaiah
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA
| | - Sandeep Kumar
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA
- Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Hemanth Kumar Kandikattu
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA
| | - Lokanatha Oruganti
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
| | - Chandra Sekhar Kathera
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA
| | - Anil Mishra
- John W. Deming Department of Medicine, Tulane Eosinophilic Disorders Center (TEDC), Section of Pulmonary Diseases, Tulane University School of Medicine, New Orleans, LA, USA.
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Chen K, Wang J, Guo L, Wang J, Yang L, Hu T, Zhao Y, Wang X, Zhu Y. Lactobacillus johnsonii L531 Ameliorates Salmonella enterica Serovar Typhimurium Diarrhea by Modulating Iron Homeostasis and Oxidative Stress via the IRP2 Pathway. Nutrients 2023; 15:nu15051127. [PMID: 36904126 PMCID: PMC10005772 DOI: 10.3390/nu15051127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
Salmonella enterica serovar Typhimurium (S. Typhimurium) has evolved mechanisms to evade the host's nutritional immunity and thus promote bacterial growth by using the iron in the host. However, the detailed mechanisms of S. Typhimurium induce dysregulation of iron homeostasis and whether Lactobacillus johnsonii L531 can alleviate the iron metabolism disorder caused by S. Typhimurium has not been fully elucidated. Here, we show that S. Typhimurium activated the expression of iron regulatory protein 2 (IRP2), transferrin receptor 1, and divalent metal transporter protein 1 and suppressed the expression of iron exporter ferroportin, which resulted in iron overload and oxidative stress, inhibiting the key antioxidant proteins NF-E2-related factor 2, Heme Oxygenase-1, and Superoxide Dismutase in vitro and in vivo. L. johnsonii L531 pretreatment effectively reversed these phenomena. IRP2 knockdown inhibited iron overload and oxidative damage induced by S. Typhimurium in IPEC-J2 cells, while IRP2 overexpression promoted iron overload and oxidative damage caused by S. Typhimurium. Interestingly, the protective effect of L. johnsonii L531 on iron homeostasis and antioxidant function was blocked following IRP2 overexpression in Hela cells, demonstrating that L. johnsonii L531 attenuates disruption of iron homeostasis and consequent oxidative damage caused by S. Typhimurium via the IRP2 pathway, which contributes to the prevention of S. Typhimurium diarrhea in mice.
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Affiliation(s)
- Keyuan Chen
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jiufeng Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Liang Guo
- Sanya Institute of China Agricultural University, Sanya 572000, China
| | - Jing Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Lan Yang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Ting Hu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yiqing Zhao
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xue Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yaohong Zhu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
- Correspondence: ; Tel.: +86-10-6273-1094; Fax: +86-10-6273-1274
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Chang R, Tang Y, Jia H, Dong Z, Gao S, Song Q, Dong H, Xu Q, Jiang Q, Loor JJ, Sun X, Xu C. Activation of PINK1-mediated mitophagy protects bovine mammary epithelial cells against lipopolysaccharide-induced mitochondrial and inflammatory damage in vitro. Free Radic Biol Med 2023; 194:172-183. [PMID: 36464026 DOI: 10.1016/j.freeradbiomed.2022.11.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/26/2022] [Accepted: 11/30/2022] [Indexed: 12/05/2022]
Abstract
Increased metabolic stress during early lactation results in damage of mitochondria and inflammatory responses in bovine mammary epithelial cells, both of which could be aggravated by inhibition of mitophagy. PTEN-induced putative kinase 1 (PINK1)-mediated mitophagy is essential in the removal of damaged mitochondria and the regulation of inflammatory responses. The aim of the present study was to elucidate the role of PINK1-mediated mitophagy on mitochondrial damage and inflammatory responses in bovine mammary epithelial cells challenged with lipopolysaccharide (LPS). Exogenous LPS activated mitophagy and led to lower protein abundance of oxidative phosphorylation (OXPHOS) complexes (COI-V) and lower oxygen consumption rate (OCR) along with increased mitochondrial reactive oxygen species (Mito-ROS) content. These effects were also associated with increased protein abundance of Nucleotide-binding oligomerization domain-like receptor containing pyrin domain 3 (NLRP3) in a time-dependent manner. Pretreatment with 3-Methyladenine (3-MA) or knockdown of PINK1 aggravated the downregulation of COI-V protein abundance, the increase in Mito-ROS content, and the protein abundance of NLRP3, Cleaved-Caspase-1 and IL-1β induced by LPS. Overexpression of PINK1 activated mitophagy and alleviated LPS-induced NLRP3 inflammasome activation by reducing Mito-ROS production. Overall, the data suggested that PINK1-mediated mitophagy is a crucial anti-inflammatory mechanism that removes damaged mitochondria in bovine mammary epithelial cells experiencing an increased inflammatory load.
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Affiliation(s)
- Renxu Chang
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China; College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Yan Tang
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hongdou Jia
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Zhihao Dong
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shuang Gao
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Qian Song
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hao Dong
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Qiushi Xu
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Qianming Jiang
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, USA
| | - Juan J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, USA
| | - Xudong Sun
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China.
| | - Chuang Xu
- Key Laboratory of Bovine Disease Control in Northeast China, Ministry of Agriculture and Rural Affairs, Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China; College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing, China.
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9
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Zhao W, Xu M, Barkema HW, Xie X, Lin Y, Khan S, Kastelic JP, Wang D, Deng Z, Han B. Prototheca bovis induces autophagy in bovine mammary epithelial cells via the HIF-1α and AMPKα/ULK1 pathway. Front Immunol 2022; 13:934819. [PMID: 36148236 PMCID: PMC9486811 DOI: 10.3389/fimmu.2022.934819] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/10/2022] [Indexed: 11/29/2022] Open
Abstract
Prototheca bovis, a highly contagious pathogen, causes bovine mastitis, resulting in premature culling of affected cows and severe economic losses. Infection with P. bovis caused oxidative stress and apoptosis in bovine mammary epithelial cells (bMECs); however, mechanisms underlying P. bovis-induced autophagy remain unclear. Therefore, the autophagy flux induced by P. bovis in bMECs was analyzed by Western blot and laser scanning confocal microscopy. Expression levels of proteins in the HIF-1α and AMPKα/ULK1 pathway, including HIF-1α, AMPKα, p-AMPKα, ULK1, p-ULK1, mTOR, and p-mTOR, plus expression of autophagy-related genes including SQSTM1/p62, Atg5, Beclin1, and LC3II/LC3I, were quantified with Western blot. Infection with P. bovis induced autophagosomes and LC3 puncta in bMECs that were detected using transmission electron microscopy and laser scanning confocal microscopy, respectively. In addition, lysosome-associated proteins Rab7 and LAMP2a, and lysosomal activity were measured with Western blot and laser scanning confocal microscopy. Infection with P. bovis induced an unobstructed autophagic flux, increased protein expression of LC3II/LC3I, and decreased SQSTM1/p62 protein expression at 6 hpi. Furthermore, P. bovis upregulated protein expression in the HIF-1α and AMPKα/ULK1 pathway and increased the ratio of LC3II/LC3I, implying autophagy was activated in bMECs. However, deletion of AMPKα or ULK1 decreased LC3II/LC3I expression levels and LC3 puncta numbers, suggesting that autophagy was inhibited in bMECs. Additionally, deficiency of HIF-1α decreased protein expression of AMPKα and ULK1 as well as LC3 puncta numbers, and autophagy induced by P. bovis was also inhibited in bMECs. At 6 hpi, lysosome-associated protein Rab7 was decreased and LAMP2a was increased, indicating normal autophagy. In contrast, at 12 hpi, expression of Rab7 and LAMP2a proteins indicated that autophagy was inhibited in bMECs at that time. Therefore, we confirmed that P. bovis infection induced autophagy in bMECs via the HIF-1α and AMPKα/ULK1 pathway, with involvement of lysosome-associated protein Rab7 and LAMP2a.
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Affiliation(s)
- Wenpeng Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Maolin Xu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Herman W. Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Xiaochen Xie
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yushan Lin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Sohrab Khan
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - John P. Kastelic
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Dong Wang
- College of Life Science, Ningxia University, Yinchuan, China
| | - Zhaoju Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
- *Correspondence: Zhaoju Deng, ; Bo Han,
| | - Bo Han
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing, China
- *Correspondence: Zhaoju Deng, ; Bo Han,
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Inflammation: A New Look at an Old Problem. Int J Mol Sci 2022; 23:ijms23094596. [PMID: 35562986 PMCID: PMC9100490 DOI: 10.3390/ijms23094596] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 02/07/2023] Open
Abstract
Pro-inflammatory stress is inherent in any cells that are subject to damage or threat of damage. It is defined by a number of universal components, including oxidative stress, cellular response to DNA damage, unfolded protein response to mitochondrial and endoplasmic reticulum stress, changes in autophagy, inflammasome formation, non-coding RNA response, formation of an inducible network of signaling pathways, and epigenetic changes. The presence of an inducible receptor and secretory phenotype in many cells is the cause of tissue pro-inflammatory stress. The key phenomenon determining the occurrence of a classical inflammatory focus is the microvascular inflammatory response (exudation, leukocyte migration to the alteration zone). This same reaction at the systemic level leads to the development of life-critical systemic inflammation. From this standpoint, we can characterize the common mechanisms of pathologies that differ in their clinical appearance. The division of inflammation into alternative variants has deep evolutionary roots. Evolutionary aspects of inflammation are also described in the review. The aim of the review is to provide theoretical arguments for the need for an up-to-date theory of the relationship between key human pathological processes based on the integrative role of the molecular mechanisms of cellular and tissue pro-inflammatory stress.
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