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Wang R, Yan B, Yin Y, Wang X, Wu M, Wen T, Qian Y, Wang Y, Huang C, Zhu Y. Polysaccharides extracted from larvae of Lucilia sericata ameliorated ulcerative colitis by regulating the intestinal barrier and gut microbiota. Int J Biol Macromol 2024; 270:132441. [PMID: 38761897 DOI: 10.1016/j.ijbiomac.2024.132441] [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: 03/19/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 05/20/2024]
Abstract
Pest management technology has been a promising bioconversion method for waste resource utilization. Unlike many pests that consume waste, the larvae of Lucilia sericata, also known as maggots, have many outstanding advantages as following: with their strong adaption to environment and not easily infected and exhibiting a medicinal nutritional value. Herein, the potential efficacies of maggot polysaccharides (MP), as well as their underlying mechanisms, were explored in Dextran sulfate sodium (DSS)-induced colitis mice and TNF-α-elicited Caco-2 cells. We extracted two bioactive polysaccharides from maggots, MP-80 and MP-L, whose molecular weights were 4.25 × 103 and 2.28 × 103 g/mol, respectively. MP-80 and MP-L contained nine sugar residues: 1,4-α-Arap, 1,3-β-Galp, 1,4,6-β-Galp, 1,6-α-Glcp, 1-α-Glcp, 1,4-β-Glcp, 1-β-Xylp, 1,2-α-Manp, and 1-β-Manp. We demonstrated that MP-80 and MP-L significantly ameliorated DSS-induced symptoms and histopathological damage. Immuno-analysis revealed that compared with MP-L, MP-80 could better restore intestinal barrier and reduced inflammation by suppressing NLRP3/NF-κB pathways, which might be attributed to its enriched galactose fraction. Moreover, 16S rRNA sequencing revealed that MP-80 and MP-L both improved the dysbiosis and diversity of gut microbiota and acted on multiple microbial functions. Our study sheds new light on the possibility of using maggot polysaccharides as an alternative therapy for colitis.
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Affiliation(s)
- Rong Wang
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210000, Jiangsu, PR China
| | - Bowen Yan
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210000, PR China
| | - Yourui Yin
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210000, Jiangsu, PR China
| | - Xueyuan Wang
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210000, Jiangsu, PR China
| | - Mei Wu
- The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou 225500, Jiangsu, PR China
| | - Tiantian Wen
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210000, Jiangsu, PR China
| | - Yin Qian
- Taizhou Second People's Hospital, Taizhou 225500, Jiangsu, PR China
| | - Yong Wang
- State Key Laboratory of Analytical Chemistry for Life Science & Jiangsu Key Laboratory of Molecular Medicine, Medical school, Nanjing University, Nanjing 210000, PR China.
| | - Caoxing Huang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210000, PR China.
| | - Yongqiang Zhu
- Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210000, Jiangsu, PR China.
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Lee Y, Yoon B, Son S, Cho E, Kim KB, Choi EY, Kim DE. Inhibition of Immunoproteasome Attenuates NLRP3 Inflammasome Response by Regulating E3 Ubiquitin Ligase TRIM31. Cells 2024; 13:675. [PMID: 38667290 PMCID: PMC11048918 DOI: 10.3390/cells13080675] [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: 02/24/2024] [Revised: 04/08/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
Excessive secretion of pro-inflammatory cytokines leads to the disruption of intestinal barrier in inflammatory bowel disease (IBD). The inflammatory cytokine tumor necrosis factor alpha (TNFα) induces the assembly of the NLRP3 inflammasome, resulting in the augmented secretion of inflammatory cytokines implicated in the pathogenesis of inflammatory bowel disease (IBD). TNFα has also been known to induce the formation of immunoproteasome (IP), which incorporates immunosubunits LMP2, LMP7, and MECL-1. Inhibition of IP activity using the IP subunit LMP2-specific inhibitor YU102, a peptide epoxyketone, decreased the protein levels of NLRP3 and increased the K48-linked polyubiquitination levels of NLRP3 in TNFα-stimulated intestinal epithelial cells. We observed that inhibition of IP activity caused an increase in the protein level of the ubiquitin E3 ligase, tripartite motif-containing protein 31 (TRIM31). TRIM31 facilitated K48-linked polyubiquitination and proteasomal degradation of NLRP3 with an enhanced interaction between NLRP3 and TRIM31 in intestinal epithelial cells. In addition, IP inhibition using YU102 ameliorated the symptoms of colitis in the model mice inflicted with dextran sodium sulfate (DSS). Administration of YU102 in the DSS-treated colitis model mice caused suppression of the NLRP3 protein levels and accompanied inflammatory cytokine release in the intestinal epithelium. Taken together, we demonstrated that inhibiting IP under inflammatory conditions induces E3 ligase TRIM31-mediated NLRP3 degradation, leading to attenuation of the NLRP3 inflammatory response that triggers disruption of intestinal barrier.
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Affiliation(s)
- Yubin Lee
- Department of Bioscience and Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; (Y.L.); (B.Y.); (S.S.); (E.C.)
| | - Boran Yoon
- Department of Bioscience and Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; (Y.L.); (B.Y.); (S.S.); (E.C.)
| | - Sumin Son
- Department of Bioscience and Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; (Y.L.); (B.Y.); (S.S.); (E.C.)
| | - Eunbin Cho
- Department of Bioscience and Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; (Y.L.); (B.Y.); (S.S.); (E.C.)
| | - Kyung Bo Kim
- Department of Cellular & Molecular Medicine, Herbert Wertheim College of Medicine, Center for Translational Science at Port St. Lucie, Florida International University, 11350 SW Village Pkwy, Port St. Lucie, FL 34987, USA;
| | - Eun Young Choi
- Department of Cellular & Molecular Medicine, Herbert Wertheim College of Medicine, Center for Translational Science at Port St. Lucie, Florida International University, 11350 SW Village Pkwy, Port St. Lucie, FL 34987, USA;
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea; (Y.L.); (B.Y.); (S.S.); (E.C.)
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Jiang Z, Li J, Wang J, Pan Y, Liang S, Hu Y, Wang L. Multifunctional fucoidan-loaded Zn-MOF-encapsulated microneedles for MRSA-infected wound healing. J Nanobiotechnology 2024; 22:152. [PMID: 38575979 PMCID: PMC10996189 DOI: 10.1186/s12951-024-02398-4] [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: 10/11/2023] [Accepted: 03/18/2024] [Indexed: 04/06/2024] Open
Abstract
Infected wound healing remains a challenging task in clinical practice due to several factors: (I) drug-resistant infections caused by various pathogens, (II) persistent inflammation that hinders tissue regeneration and (III) the ability of pathogens to persist intracellularly and evade antibiotic treatment. Microneedle patches (MNs), recognized for their effecacious and painless subcutaneous drug delivery, could greatly enhance wound healing if integrated with antibacterial functionality and tissue regenerative potential. A multifunctional agent with subcellular targeting capability and contained novel antibacterial components, upon loading onto MNs, could yield excellent therapeutic effects on wound infections. In this study, we sythesised a zeolitic imidazolate framework-8 nanoparticles (ZIF-8 NPs) loaded with low molecular weight fucoidan (Fu) and further coating by hyaluronic acid (HA), obtained a multifunctional HAZ@Fu NPs, which could hinders Methicillin-resistant Staphylococcus aureus (MRSA) growth and promotes M2 polarization in macrophages. We mixed HAZ@Fu NPs with photocrosslinked gelatin methacryloyl (GelMA) and loaded it into the tips of the MNs (HAZ@Fu MNs), administered to mice model with MRSA-infected full-thickness cutaneous wounds. MNs are able to penetrate the skin barrier, delivering HAZ@Fu NPs into the dermal layer. Since cells within infected tissues extensively express the HA receptor CD44, we also confirmed the HA endows the nanoparticles with the ability to target MRSA in subcellular level. In vitro and in vivo murine studies have demonstrated that MNs are capable of delivering HAZ@Fu NPs deep into the dermal layers. And facilitated by the HA coating, HAZ@Fu NPs could target MRSA surviving at the subcellular level. The effective components, such as zinc ions, Fu, and hyaluronic acid could sustainably released, which contributes to antibacterial activity, mitigates inflammation, promotes epithelial regeneration and fosters neovascularization. Through the RNA sequencing of macrophages post co-culture with HAZ@Fu, the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis reveals that the biological functionalities associated with wound healing could potentially be facilitated through the PI3K-Akt pathway. The results indicate that the synergistic application of HAZ@Fu NPs with biodegradable MNs may serve as a significant adjunct in the treatment of infected wounds. The intricate mechanisms driving its biological effects merit further investigation.
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Affiliation(s)
- Zichao Jiang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- University Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Jingyi Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- University Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Jiahao Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- University Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Yixiao Pan
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- University Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Shuailong Liang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- University Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Yihe Hu
- Department of Orthopedics, First Affiliated Hospital, School of Medicine, Zhejiang, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
| | - Long Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China.
- University Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China.
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Xu R, Yuan LS, Gan YQ, Lu N, Li YP, Zhou ZY, Hu B, Wong TS, He XH, Zha QB, Ouyang DY. Extracellular ATP contributes to the reactive oxygen species burst and exaggerated mitochondrial damage in D-galactosamine and lipopolysaccharide-induced fulminant hepatitis. Int Immunopharmacol 2024; 130:111680. [PMID: 38368772 DOI: 10.1016/j.intimp.2024.111680] [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: 11/16/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/20/2024]
Abstract
Fulminant hepatitis (FH) is a severe clinical syndrome leading to hepatic failure and even mortality. D-galactosamine (D-GalN) plus lipopolysaccharide (LPS) challenge is commonly used to establish an FH mouse model, but the mechanism underlying D-GalN/LPS-induced liver injury is incompletely understood. Previously, it has been reported that extracellular ATP that can be released under cytotoxic and inflammatory stresses serves as a damage signal to induce potassium ion efflux and trigger the NACHT, LRR and PYD domains-containing protein 3 (NLRP3) inflammasome activation through binding to P2X7 receptor. In this study, we tried to investigate whether it contributed to the fulminant hepatitis (FH) induced by D-GalN plus LPS. In an in vitro cellular model, D-GalN plus extracellular ATP, instead of D-GalN alone, induced pyroptosis and apoptosis, accompanied by mitochondrial reactive oxygen species (ROS) burst, and the oligomerization of Drp1, Bcl-2, and Bak, as well as the loss of mitochondrial membrane potential in LPS-primed macrophages, well reproducing the events induced by D-GalN and LPS in vivo. Moreover, these events in the cellular model were markedly suppressed by both A-804598 (an ATP receptor P2X7R inhibitor) and glibenclamide (an ATP-sensitive potassium ion channel inhibitor); in the FH mouse model, administration of A-804598 significantly mitigated D-GalN/LPS-induced hepatic injury, mitochondrial damage, and the activation of apoptosis and pyroptosis signaling, corroborating the contribution of extracellular ATP to the cell death. Collectively, our data suggest that extracellular ATP acts as an autologous damage-associated molecular pattern to augment mitochondrial damage, hepatic cell death, and liver injury in D-GalN/LPS-induced FH mouse model.
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Affiliation(s)
- Rong Xu
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Li-Sha Yuan
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ying-Qing Gan
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Na Lu
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ya-Ping Li
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; Guangdong Provincial Key Laboratory of Spine and Spinal Cord Reconstruction, the Fifth Affiliated Hospital (Heyuan Shenhe People's Hospital), Jinan University, Heyuan 517000, China; Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan 517000, China
| | - Zhi-Ya Zhou
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; Guangdong Provincial Key Laboratory of Spine and Spinal Cord Reconstruction, the Fifth Affiliated Hospital (Heyuan Shenhe People's Hospital), Jinan University, Heyuan 517000, China; Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan 517000, China
| | - Bo Hu
- Department of Nephrology, the First Affiliated Hospital of Jinan University, Guangzhou 510630, China
| | - Tak-Sui Wong
- Department of Nephrology, the First Affiliated Hospital of Jinan University, Guangzhou 510630, China
| | - Xian-Hui He
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; Guangdong Provincial Key Laboratory of Spine and Spinal Cord Reconstruction, the Fifth Affiliated Hospital (Heyuan Shenhe People's Hospital), Jinan University, Heyuan 517000, China; Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan 517000, China.
| | - Qing-Bing Zha
- Guangdong Provincial Key Laboratory of Spine and Spinal Cord Reconstruction, the Fifth Affiliated Hospital (Heyuan Shenhe People's Hospital), Jinan University, Heyuan 517000, China; Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan 517000, China; Department of Fetal Medicine, the First Affiliated Hospital of Jinan University, Guangzhou 510630, China.
| | - Dong-Yun Ouyang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
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Xu J, Xu H, Guo X, Zhao H, Wang J, Li J, He J, Huang H, Huang C, Zhao C, Li Y, Zhou Y, Peng Y, Nie Y. Pretreatment with an antibiotics cocktail enhances the protective effect of probiotics by regulating SCFA metabolism and Th1/Th2/Th17 cell immune responses. BMC Microbiol 2024; 24:91. [PMID: 38500062 PMCID: PMC10946100 DOI: 10.1186/s12866-024-03251-2] [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: 10/24/2023] [Accepted: 03/07/2024] [Indexed: 03/20/2024] Open
Abstract
BACKGROUND Probiotics are a potentially effective therapy for inflammatory bowel disease (IBD); IBD is linked to impaired gut microbiota and intestinal immunity. However, the utilization of an antibiotic cocktail (Abx) prior to the probiotic intervention remains controversial. This study aims to identify the effect of Abx pretreatment from dextran sulfate sodium (DSS)-induced colitis and to evaluate whether Abx pretreatment has an enhanced effect on the protection of Clostridium butyricum Miyairi588 (CBM) from colitis. RESULTS The inflammation, dysbiosis, and dysfunction of gut microbiota as well as T cell response were both enhanced by Abx pretreatment. Additionally, CBM significantly alleviated the DSS-induced colitis and impaired gut epithelial barrier, and Abx pretreatment could enhance these protective effects. Furthermore, CBM increased the benefit bacteria abundance and short-chain fatty acids (SCFAs) level with Abx pretreatment. CBM intervention after Abx pretreatment regulated the imbalance of cytokines and transcription factors, which corresponded to lower infiltration of Th1 and Th17 cells, and increased Th2 cells. CONCLUSIONS Abx pretreatment reinforced the function of CBM in ameliorating inflammation and barrier damage by increasing beneficial taxa, eliminating pathogens, and inducing a protective Th2 cell response. This study reveals a link between Abx pretreatment, microbiota, and immune response changes in colitis, which provides a reference for the further application of Abx pretreatment before microbiota-based intervention.
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Affiliation(s)
- Jing Xu
- Department of Gastroenterology and Hepatology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Haoming Xu
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Xue Guo
- Department of Gastroenterology and Hepatology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Hailan Zhao
- Department of Gastroenterology and Hepatology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Jiaqi Wang
- Department of Gastroenterology and Hepatology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Jianhong Li
- Department of Gastroenterology and Hepatology, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Jie He
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Hongli Huang
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Chen Huang
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Chong Zhao
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Yingfei Li
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China
| | - Youlian Zhou
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China.
| | - Yao Peng
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China.
| | - Yuqiang Nie
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, South China University of Technology, Guangzhou, Guangdong, China.
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Li X, Ji LJ, Feng KD, Huang H, Liang MR, Cheng SJ, Meng XD. Emerging role of exosomes in ulcerative colitis: Targeting NOD-like receptor family pyrin domain containing 3 inflammasome. World J Gastroenterol 2024; 30:527-541. [PMID: 38463022 PMCID: PMC10921143 DOI: 10.3748/wjg.v30.i6.527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/21/2023] [Accepted: 01/09/2024] [Indexed: 02/05/2024] Open
Abstract
Ulcerative colitis (UC) is a chronic recurrent inflammatory bowel disease. Despite ongoing advances in our understanding of UC, its pathogenesis is yet unelucidated, underscoring the urgent need for novel treatment strategies for patients with UC. Exosomes are nanoscale membrane particles that mediate intercellular communication by carrying various bioactive molecules, such as proteins, RNAs, DNA, and metabolites. The NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome is a cytosolic tripartite protein complex whose activation induces the maturation and secretion of proinflammatory cytokines interleukin-1β (IL-1β) and IL-18, triggering the inflammatory response to a pathogenic agent or injury. Growing evidence suggests that exosomes are new modulators of the NLRP3 inflammasome, with vital roles in the pathological process of UC. Here, recent evidence is reviewed on the role of exosomes and NLRP3 inflammasome in UC. First, the dual role of exosomes on NLRP3 inflammasome and the effect of NLRP3 inflammasome on exosome secretion are summarized. Finally, an outlook on the directions of exosome-NLRP3 inflammasome crosstalk research in the context of UC is proposed and areas of further research on this topic are highlighted.
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Affiliation(s)
- Xin Li
- School of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, Guizhou Province, China
| | - Li-Jiang Ji
- Department of Anorectal Surgery, Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu 215500, Jiangsu Province, China
| | - Kai-Di Feng
- College of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Hua Huang
- Department of Anorectal Surgery, Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu 215500, Jiangsu Province, China
| | - Mei-Rou Liang
- College of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Shi-Jin Cheng
- College of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Xiu-Dong Meng
- School of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, Guizhou Province, China
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Ni ST, Li Q, Chen Y, Shi FL, Wong TS, Yuan LS, Xu R, Gan YQ, Lu N, Li YP, Zhou ZY, Xu LH, He XH, Hu B, Ouyang DY. Anti-Necroptotic Effects of Itaconate and its Derivatives. Inflammation 2024; 47:285-306. [PMID: 37759136 DOI: 10.1007/s10753-023-01909-z] [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: 06/19/2023] [Revised: 09/17/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
Itaconate is an unsaturated dicarboxylic acid that is derived from the decarboxylation of the Krebs cycle intermediate cis-aconitate and has been shown to exhibit anti-inflammatory and anti-bacterial/viral properties. But the mechanisms underlying itaconate's anti-inflammatory activities are not fully understood. Necroptosis, a lytic form of regulated cell death (RCD), is mediated by receptor-interacting protein kinase 1 (RIPK1), RIPK3, and mixed lineage kinase domain-like protein (MLKL) signaling. It has been involved in the pathogenesis of organ injury in many inflammatory diseases. In this study, we aimed to explore whether itaconate and its derivatives can inhibit necroptosis in murine macrophages, a mouse MPC-5 cell line and a human HT-29 cell line in response to different necroptotic activators. Our results showed that itaconate and its derivatives dose-dependently inhibited necroptosis, among which dimethyl itaconate (DMI) was the most effective one. Mechanistically, itaconate and its derivatives inhibited necroptosis by suppressing the RIPK1/RIPK3/MLKL signaling and the oligomerization of MLKL. Furthermore, DMI promoted the nuclear translocation of Nrf2 that is a critical regulator of intracellular redox homeostasis, and reduced the levels of intracellular reactive oxygen species (ROS) and mitochondrial superoxide (mtROS) that were induced by necroptotic activators. Consistently, DMI prevented the loss of mitochondrial membrane potential induced by the necroptotic activators. In addition, DMI mitigated caerulein-induced acute pancreatitis in mice accompanied by reduced activation of the necroptotic signaling in vivo. Collectively, our study demonstrates that itaconate and its derivatives can inhibit necroptosis by suppressing the RIPK1/RIPK3/MLKL signaling, highlighting their potential applications for treating necroptosis-associated diseases.
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Affiliation(s)
- Si-Tao Ni
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Qing Li
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Ying Chen
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Fu-Li Shi
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Tak-Sui Wong
- Department of Nephrology, the First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Li-Sha Yuan
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Rong Xu
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Ying-Qing Gan
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Na Lu
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Ya-Ping Li
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Zhi-Ya Zhou
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Li-Hui Xu
- Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Xian-Hui He
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
- Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan, 517000, China.
| | - Bo Hu
- Department of Nephrology, the First Affiliated Hospital of Jinan University, Guangzhou, 510630, China.
| | - Dong-Yun Ouyang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
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Liao K, Zeng H, Yang X, He D, Wang B, Yuan J. KCNK5 Regulating Potassium Efflux and Inducing Pyroptosis in Corneal Epithelial Cells Through TNFSF10-Mediated Autophagy in Dry Eye. Invest Ophthalmol Vis Sci 2024; 65:34. [PMID: 38236186 PMCID: PMC10807492 DOI: 10.1167/iovs.65.1.34] [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: 11/09/2023] [Accepted: 01/03/2024] [Indexed: 01/19/2024] Open
Abstract
Purpose The purpose of this study was to elucidate the involvement of potassium two pore domain channel subfamily K member 5 (KCNK5)-mediated potassium efflux in the pathogenesis of dry eye and to unravel the underlying molecular mechanisms. Methods To induce experimental dry eye in adult wild-type C57BL/6 mice, scopolamine was administered via subcutaneous injection, and the mice were subjected to desiccating stress. To create an in vitro model of dry eye, desiccation stress was applied to the human corneal epithelial cell line (HCE-T). Intracellular potassium concentration was quantified using inductively coupled plasma mass spectrometry. Cellular death was assessed through lactate dehydrogenase assays. Gene expression profiling was conducted through both RNA sequencing and quantitative real-time PCR. Protein analysis was carried out through Western blotting and immunofluorescence staining. Assessment of the corneal epithelial defect area was conducted through fluorescein sodium staining. Tear secretion was quantified using the phenol red cotton thread method. Results Potassium efflux was observed to further facilitate corneal epithelial pyroptosis. KCNK5 exhibited upregulation in both in vivo and in vitro models of dry eye. The overexpression of KCNK5 was observed to induce potassium efflux and activate the NLR family pyrin domain containing 3 (NLRP3) inflammasome-mediated pyroptosis in vitro. Silencing KCNK5 effectively mitigated pyroptosis in dry eye. Additionally, the overexpression of KCNK5 results in the downregulation of TNF superfamily member 10 (TNFSF10) and subsequent impairment of autophagy. TNFSF10 supplementation could promote autophagy and mitigate pyroptosis in dry eye. Conclusions The upregulation of KCNK5 mediates TNFSF10 to impair autophagy and induce pyroptosis in dry eye. Consequently, targeting KCNK5 may represent a novel and promising approach to therapeutic intervention in the management of dry eye.
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Affiliation(s)
- Kai Liao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Hao Zeng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xue Yang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Dalian He
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Bowen Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Jin Yuan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
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Alghareeb SA, Alsughayyir J, Alfhili MA. Eriocitrin Disrupts Erythrocyte Membrane Asymmetry through Oxidative Stress and Calcium Signaling and the Activation of Casein Kinase 1α and Rac1 GTPase. Pharmaceuticals (Basel) 2023; 16:1681. [PMID: 38139808 PMCID: PMC10747371 DOI: 10.3390/ph16121681] [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: 10/21/2023] [Revised: 11/21/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
BACKGROUND Hemolysis and eryptosis result in the premature elimination of circulating erythrocytes and thus contribute to chemotherapy-related anemia, which is extremely prevalent in cancer patients. Eriocitrin (ERN), a flavanone glycoside in citrus fruits, has shown great promise as an anticancer agent, but the potential toxicity of ERN to human erythrocytes remains unstudied. METHODS Erythrocytes were exposed to anticancer concentrations of ERN (10-100 μM) for 24 h at 37 °C, and hemolysis and associated markers were quantified using colorimetric assays. Eryptosis was assessed by flow cytometric analysis to detect phosphatidylserine (PS) exposure by annexin-V-FITC, intracellular Ca2+ using Fluo4/AM, and oxidative stress with 2-,7-dichlorodihydrofluorescin diacetate (H2DCFDA). ERN was also tested against specific signaling inhibitors and anti-hemolytic agents. RESULTS ERN caused significant, concentration-dependent hemolysis at 20-100 μM. ERN also significantly increased the percentage of eryptotic cells characterized by Ca2+ elevation and oxidative stress. Furthermore, the hemolytic activity of ERN was significantly ameliorated in the presence of D4476, NSC23766, isosmotic urea and sucrose, and polyethylene glycol 8000 (PEG). In whole blood, ERN significantly elevated MCV and ESR, with no appreciable effects on other peripheral blood cells. CONCLUSIONS ERN promotes premature erythrocyte death through hemolysis and eryptosis characterized by PS externalization, Ca2+ accumulation, membrane blebbing, loss of cellular volume, and oxidative stress. These toxic effects, mediated through casein kinase 1α and Rac1 GTPase, can be ameliorated by urea, sucrose, and PEG. Altogether, these novel findings are relevant to the further development of ERN as an anticancer therapeutic.
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Affiliation(s)
| | | | - Mohammad A. Alfhili
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia; (S.A.A.)
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10
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Zhang HR, Li YP, Shi ZJ, Liang QQ, Chen SY, You YP, Yuan T, Xu R, Xu LH, Ouyang DY, Zha QB, He XH. Triptolide induces PANoptosis in macrophages and causes organ injury in mice. Apoptosis 2023; 28:1646-1665. [PMID: 37702860 DOI: 10.1007/s10495-023-01886-6] [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] [Accepted: 08/21/2023] [Indexed: 09/14/2023]
Abstract
Macrophages represent the first lines of innate defense against pathogenic infections and are poised to undergo multiple forms of regulated cell death (RCD) upon infections or toxic stimuli, leading to multiple organ injury. Triptolide, an active compound isolated from Tripterygium wilfordii Hook F., possesses various pharmacological activities including anti-tumor and anti-inflammatory effects, but its applications have been hampered by toxic adverse effects. It remains unknown whether and how triptolide induces different forms of RCD in macrophages. In this study, we showed that triptolide exhibited significant cytotoxicity on cultured macrophages in vitro, which was associated with multiple forms of lytic cell death that could not be fully suppressed by any one specific inhibitor for a single form of RCD. Consistently, triptolide induced the simultaneous activation of pyroptotic, apoptotic and necroptotic hallmarks, which was accompanied by the co-localization of ASC specks respectively with RIPK3 or caspase-8 as well as their interaction with each other, indicating the formation of PANoptosome and thus the induction of PANoptosis. Triptolide-induced PANoptosis was associated with mitochondrial dysfunction and ROS production. PANoptosis was also induced by triptolide in mouse peritoneal macrophages in vivo. Furthermore, triptolide caused kidney and liver injury, which was associated with systemic inflammatory responses and the activation of hallmarks for PANoptosis in vivo. Collectively, our data reveal that triptolide induces PANoptosis in macrophages in vitro and exhibits nephrotoxicity and hepatotoxicity associated with induction of PANoptosis in vivo, suggesting a new avenue to alleviate triptolide's toxicity by harnessing PANoptosis.
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Affiliation(s)
- Hong-Rui Zhang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
- Department of Clinical Laboratory, The Fifth Affiliated Hospital of Jinan University, Heyuan, 517000, China
| | - Ya-Ping Li
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Zi-Jian Shi
- Department of Fetal Medicine, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Qi-Qi Liang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Si-Yuan Chen
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Yi-Ping You
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Tao Yuan
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Rong Xu
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Li-Hui Xu
- Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Dong-Yun Ouyang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
| | - Qing-Bing Zha
- Department of Fetal Medicine, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China.
- Department of Clinical Laboratory, The Fifth Affiliated Hospital of Jinan University, Heyuan, 517000, China.
| | - Xian-Hui He
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
- Department of Clinical Laboratory, The Fifth Affiliated Hospital of Jinan University, Heyuan, 517000, China.
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11
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Chen SY, Li YP, You YP, Zhang HR, Shi ZJ, Liang QQ, Yuan T, Xu R, Xu LH, Zha QB, Ou-Yang DY, He XH. Theaflavin mitigates acute gouty peritonitis and septic organ injury in mice by suppressing NLRP3 inflammasome assembly. Acta Pharmacol Sin 2023; 44:2019-2036. [PMID: 37221235 PMCID: PMC10545837 DOI: 10.1038/s41401-023-01105-7] [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: 11/30/2022] [Accepted: 05/03/2023] [Indexed: 05/25/2023] Open
Abstract
Activation of NLR family pyrin domain-containing 3 (NLRP3) inflammasome plays important role in defending against infections, but its aberrant activation is causally linked to many inflammatory diseases, thus being a therapeutic target for these diseases. Theaflavin, one major ingredient of black tea, exhibits potent anti-inflammatory and anti-oxidative activities. In this study, we investigated the therapeutic effects of theaflavin against NLRP3 inflammasome activation in macrophages in vitro and in animal models of related diseases. We showed that theaflavin (50, 100, 200 μM) dose-dependently inhibited NLRP3 inflammasome activation in LPS-primed macrophages stimulated with ATP, nigericin or monosodium urate crystals (MSU), evidenced by reduced release of caspase-1p10 and mature interleukin-1β (IL-1β). Theaflavin treatment also inhibited pyroptosis as shown by decreased generation of N-terminal fragment of gasdermin D (GSDMD-NT) and propidium iodide incorporation. Consistent with these, theaflavin treatment suppressed ASC speck formation and oligomerization in macrophages stimulated with ATP or nigericin, suggesting reduced inflammasome assembly. We revealed that theaflavin-induced inhibition on NLRP3 inflammasome assembly and pyroptosis resulted from ameliorated mitochondrial dysfunction and reduced mitochondrial ROS production, thereby suppressing interaction between NLRP3 and NEK7 downstream of ROS. Moreover, we showed that oral administration of theaflavin significantly attenuated MSU-induced mouse peritonitis and improved the survival of mice with bacterial sepsis. Consistently, theaflavin administration significantly reduced serum levels of inflammatory cytokines including IL-1β and attenuated liver inflammation and renal injury of mice with sepsis, concomitant with reduced generation of caspase-1p10 and GSDMD-NT in the liver and kidney. Together, we demonstrate that theaflavin suppresses NLRP3 inflammasome activation and pyroptosis by protecting mitochondrial function, thus mitigating acute gouty peritonitis and bacterial sepsis in mice, highlighting a potential application in treating NLRP3 inflammasome-related diseases.
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Affiliation(s)
- Si-Yuan Chen
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Ya-Ping Li
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Yi-Ping You
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Hong-Rui Zhang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Zi-Jian Shi
- Department of Fetal Medicine, the First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Qi-Qi Liang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Tao Yuan
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Rong Xu
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Li-Hui Xu
- Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Qing-Bing Zha
- Department of Fetal Medicine, the First Affiliated Hospital of Jinan University, Guangzhou, 510630, China.
- Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan, 517000, China.
| | - Dong-Yun Ou-Yang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
| | - Xian-Hui He
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
- Department of Clinical Laboratory, the Fifth Affiliated Hospital of Jinan University, Heyuan, 517000, China.
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Celastrol inhibits necroptosis by attenuating the RIPK1/RIPK3/MLKL pathway and confers protection against acute pancreatitis in mice. Int Immunopharmacol 2023; 117:109974. [PMID: 37012867 DOI: 10.1016/j.intimp.2023.109974] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/17/2023] [Accepted: 02/28/2023] [Indexed: 03/17/2023]
Abstract
Necroptosis is a necrotic form of regulated cell death, which is primarily mediated by the receptor-interacting protein kinase 1 (RIPK1), RIPK3, and mixed lineage kinase domain-like (MLKL) pathway in a caspase-independent manner. Necroptosis has been found to occur in virtually all tissues and diseases evaluated, including pancreatitis. Celastrol, a pentacyclic triterpene extracted from the roots of Tripterygium wilfordii (thunder god vine), possesses potent anti-inflammatory and anti-oxidative activities. Yet, it is unclear whether celastrol has any effects on necroptosis and necroptotic-related diseases. Here we showed that celastrol significantly suppressed necroptosis induced by lipopolysaccharide (LPS) plus pan-caspase inhibitor (IDN-6556) or by tumor-necrosis factor-α in combination with LCL-161 (Smac mimetic) and IDN-6556 (TSI). In these in vitro cellular models, celastrol inhibited the phosphorylation of RIPK1, RIPK3, and MLKL and the formation of necrosome during necroptotic induction, suggesting its possible action on upstream signaling of the necroptotic pathway. Consistent with the known role of mitochondrial dysfunction in necroptosis, we found that celastrol significantly rescued TSI-induced loss of mitochondrial membrane potential. TSI-induced intracellular and mitochondrial reactive oxygen species (mtROS), which are involved in the autophosphorylation of RIPK1 and recruitment of RIPK3, were significantly attenuated by celastrol. Moreover, in a mouse model of acute pancreatitis that is associated with necroptosis, celastrol administration significantly reduced the severity of caerulein-induced acute pancreatitis accompanied by decreased phosphorylation of MLKL in pancreatic tissues. Collectively, celastrol can attenuate the activation of RIPK1/RIPK3/MLKL signaling likely by attenuating mtROS production, thereby inhibiting necroptosis and conferring protection against caerulein-induced pancreatitis in mice.
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13
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Man Q, Gao Z, Chen K. Functional Potassium Channels in Macrophages. J Membr Biol 2023; 256:175-187. [PMID: 36622407 DOI: 10.1007/s00232-022-00276-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 12/30/2022] [Indexed: 01/10/2023]
Abstract
Macrophages are the predominant component of innate immunity, which is an important protective barrier of our body. Macrophages are present in all organs and tissues of the body, their main functions include immune surveillance, bacterial killing, tissue remodeling and repair, and clearance of cell debris. In addition, macrophages can present antigens to T cells and facilitate inflammatory response by releasing cytokines. Macrophages are of high concern due to their crucial roles in multiple physiological processes. In recent years, new advances are emerging after great efforts have been made to explore the mechanisms of macrophage activation. Ion channel is a class of multimeric transmembrane protein that allows specific ions to go through cell membrane. The flow of ions through ion channel between inside and outside of cell membrane is required for maintaining cell morphology and intracellular signal transduction. Expressions of various ion channels in macrophages have been detected. The roles of ion channels in macrophage activation are gradually caught attention. K+ channels are the most studied channels in immune system. However, very few of published papers reviewed the studies of K+ channels on macrophages. Here, we will review the four types of K+ channels that are expressed in macrophages: voltage-gated K+ channel, calcium-activated K+ channel, inwardly rectifying K+ channel and two-pore domain K+ channel.
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Affiliation(s)
- Qiaoyan Man
- Department of Pharmacology, Ningbo University School of Medicine, A506, Wang Changlai Building818 Fenghua Rd, Ningbo, China
| | - Zhe Gao
- Ningbo Institute of Medical Sciences, 42 Yangshan Rd, Ningbo, China.
| | - Kuihao Chen
- Department of Pharmacology, Ningbo University School of Medicine, A506, Wang Changlai Building818 Fenghua Rd, Ningbo, China.
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14
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Chen K, Shang S, Yu S, Cui L, Li S, He N. Identification and exploration of pharmacological pyroptosis-related biomarkers of ulcerative colitis. Front Immunol 2022; 13:998470. [PMID: 36311726 PMCID: PMC9606687 DOI: 10.3389/fimmu.2022.998470] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
Ulcerative colitis (UC) is a chronic inflammatory bowel disease (IBD). Its etiology is unclear. Much evidence suggests that the death of abnormal intestinal epithelial cells (IECs) leads to intestinal barrier disruption, and the subsequent inflammatory response plays a vital role in UC. Pyroptosis is a form of programmed inflammatory cell death, and the role of pyroptosis in UC etiology remains to be explored. This study identified 10 hub genes in pyroptosis by gene expression profiles obtained from the GSE87466 dataset. Meanwhile, the biomarkers were screened based on gene significance (GS) and module membership (MM) through the Weighted Gene Co-Expression Network Analysis (WGCNA). The following analysis indicated that hub genes were closely associated with the UC progression and therapeutic drug response. The single-cell RNA (scRNA) sequencing data from UC patients within the GSE162335 dataset indicated that macrophages were most related to pyroptosis. Finally, the expression of hub genes and response to the therapeutic drug [5-aminosalicylic acid (5-ASA)] were verified in dextran sulfate sodium (DSS)-induced colitis mice. Our study identified IL1B as the critical pyroptosis-related biomarker in UC. The crosstalk between macrophage pyroptosis and IEC pyroptosis may play an essential role in UC, deserving further exploration.
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Affiliation(s)
| | | | | | | | | | - Ningning He
- *Correspondence: Shangyong Li, ; Ningning He,
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