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Bao H, Cong J, Qu Q, He S, Zhao D, Zhao H, Yin S, Ma D. Rosiglitazone alleviates LPS-induced endometritis via suppression of TLR4-mediated NF-κB activation. PLoS One 2024; 19:e0280372. [PMID: 38547218 PMCID: PMC10977739 DOI: 10.1371/journal.pone.0280372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 11/21/2023] [Indexed: 04/02/2024] Open
Abstract
OBJECTIVE The aim of this study was to investigate the anti-inflammatory effect of Rosiglitazone (RGZ) on lipopolysaccharide (LPS) -induced Endometritis and explore its possible mechanism. METHODS The preventive and therapeutic effects of RGZ on Endometritis were studied in vivo and in vitro. A total of 40 female C57BL/6 mice were randomly divided into the following 4 groups: RGZ+LPS, RGZ control, LPS and DMSO control. The mice uterine tissue sections were performed with HE and immunohistochemical staining. Human endometrial stromal cells (HESCs) were cultured, and different concentrations of LPS stimulation groups and RGZ and/or a TLR4 signaling inhibitor TAK-242 pretreatment +LPS groups were established to further elucidate the underlying mechanisms of this protective effect of RGZ. RESULTS The HE results in mice showed that RGZ+LPS group had less tissue loss than LPS group. Immunohistochemical staining (IHC) results showed that the expression of TLR4 after RGZ treatment was significantly lower than that in LPS group. These findings suggested that RGZ effectively improves the pathological changes associated with LPS-induced endometritis by inhibiting TLR4. Reverse transcription-polymerase chain reaction and western blot analysis demonstrated that RGZ pretreatment suppresses the expression of Toll-like receptor 4 (TLR4) and its downstream activation of nuclear factor-κB (NF-κB). In vitro, RGZ inhibited LPS-stimulated expression of proinflammatory cytokines in a dose-dependent manner and also downregulated LPS induced toll-like receptor 4 (TLR4) expression and inhibited phosphorylation of LPS-induced nuclear transcription factor-kappa B (NF-κB) P65 protein. CONCLUSIONS These results suggest that RGZ may inhibit LPS-induced endometritis through the TLR4-mediated NF-κB pathway.
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Affiliation(s)
- Hongchu Bao
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Jianxiang Cong
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Qinglan Qu
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Shunzhi He
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Dongmei Zhao
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Huishan Zhao
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Shuyuan Yin
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
| | - Ding Ma
- Reproductive Medicine Centre, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
- Shandong Provincial Key Medical and Health Laboratory of Reproductive Health and Genetics (Yantai Yuhuangding Hospital), Yantai, China
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Su HY, Yang JJ, Zou R, An N, Chen XC, Yang C, Yang HJ, Yao CW, Liu HF. Autophagy in peritoneal fibrosis. Front Physiol 2023; 14:1187207. [PMID: 37256065 PMCID: PMC10226653 DOI: 10.3389/fphys.2023.1187207] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/03/2023] [Indexed: 06/01/2023] Open
Abstract
Peritoneal dialysis (PD) is a widely accepted renal replacement therapy for patients with end-stage renal disease (ESRD). Morphological and functional changes occur in the peritoneal membranes (PMs) of patients undergoing long-term PD. Peritoneal fibrosis (PF) is a common PD-related complication that ultimately leads to PM injury and peritoneal ultrafiltration failure. Autophagy is a cellular process of "self-eating" wherein damaged organelles, protein aggregates, and pathogenic microbes are degraded to maintain intracellular environment homeostasis and cell survival. Growing evidence shows that autophagy is involved in fibrosis progression, including renal fibrosis and hepatic fibrosis, in various organs. Multiple risk factors, including high-glucose peritoneal dialysis solution (HGPDS), stimulate the activation of autophagy, which participates in PF progression, in human peritoneal mesothelial cells (HPMCs). Nevertheless, the underlying roles and mechanisms of autophagy in PF progression remain unclear. In this review, we discuss the key roles and potential mechanisms of autophagy in PF to offer novel perspectives on future therapy strategies for PF and their limitations.
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Basta M, Saleh SR, Aly RG, Dief AE. Resveratrol ameliorates the behavioural and molecular changes in rats exposed to uninephrectomy: role of hippocampal SIRT1, BDNF and AChE. J Physiol Biochem 2022:10.1007/s13105-022-00937-x. [DOI: 10.1007/s13105-022-00937-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/25/2022] [Indexed: 12/11/2022]
Abstract
AbstractSubtle memory and cognitive changes may occur in uninephrectomized (Unix) patients long before the development of chronic kidney disease, such changes may be unnoticed. The dietary polyphenol, Resveratrol, displayed various neuroprotective effects, its role in chronic kidney disease is an area of intense studies. This work was designed to investigate the behavioural and molecular changes that may occur following 7 months of Unix in rats, and to determine whether Resveratrol intake can improve such pathology. Male Wistar rats were divided into three groups: sham operated, Unix and Unix group treated with Resveratrol (20 mg/kg/day). Rats were subjected to series of behavioural testing, different biochemical parameters along with RT-PCR and immunohistochemistry of the hippocampal tissue to track the development of functional or structural brain changes. Anxiety behaviour and reduced spatial memory performance were observed in rats 7 months post-nephrectomy; these deficits were remarkably reversed with Resveratrol. Among the species typical behaviour, burrowing was assessed; it showed significant impairment post-nephrectomy. Resveratrol intake was almost able to increase the burrowing behaviour. Decreased SIRT1 in immune-stained sections, oxidative stress, inflammatory changes, and increased AChE activity in hippocampal homogenates were found in Unix rats, and Resveratrol once more was capable to reverse such pathological changes. This work has investigated the occurrence of behavioural and structural brain changes 7 months following Unix and underlined the importance of Resveratrol to counterbalance the behavioural impairment, biochemical and brain pathological changes after uninephrectomy. These findings may raise the possible protective effects of Resveratrol intake in decreased kidney function.
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Yu F, Chen J, Wang X, Cai Q, Luo J, Wang L, Chen K, He Y. Establishment of a novel mouse peritoneal dialysis-associated peritoneal injury model. Clin Exp Nephrol 2022; 26:649-658. [PMID: 35353282 DOI: 10.1007/s10157-022-02208-x] [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: 10/26/2021] [Accepted: 03/04/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Peritoneal fibrosis induced by various factors during peritoneal dialysis (PD) can eventually lead to ultrafiltration failure and termination of PD treatment. The existing animal models are caused by a single stimulus, and cannot accurately simulate complex pathogenesis of peritoneal injury and fibrosis. We aim to develop an efficient and realistic mouse model of PD-associated peritoneal injury using daily intraperitoneal injection (I.P.) of human peritonitis PD effluent. METHODS Eight-week-old male C57BL/6 mice were classified into six groups: saline control; 2.5% PD fluid; 2.5% PD fluid + lipopolysaccharide (LPS); 4.25% PD fluid; 4.25% PD fluid + LPS; and peritonitis effluent. Mice received daily I.P. for 6 weeks, and were sacrificed to determine peritoneal structural and functional damage, inflammation, and fibrosis. RESULTS Mice in the peritonitis effluent group had low mortality. The submesothelial thickness in the peritonitis effluent group was significantly greater than that in the 2.5% PD fluid group. The peritonitis effluent group had increased expression of fibrosis markers (α-SMA, Collagen I, etc.), neutrophil granulocytes (MPO), and macrophages (CD68, F4/80) in the peritoneum based on immunohistochemical staining; and significantly higher expression of inflammation markers (IL-1β, IL-6, etc.) and fibrosis markers (TGF-β1, α-SMA, etc.) based on real-time qPCR. Modified peritoneal equilibration tests (PET) demonstrated that I.P. of peritonitis effluent reduced peritoneal ultrafiltration. CONCLUSION Our novel animal model of PD-associated peritoneal injury faithfully simulates the clinical pathophysiological process. This animal model may be useful for study of the pathogenesis of PD-associated peritoneal injury and identification of novel treatments.
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Affiliation(s)
- Fang Yu
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China
| | - Jia Chen
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China
| | - Xiaoyue Wang
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China
| | - Qingli Cai
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China
| | - Jia Luo
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China
| | - Liming Wang
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China
| | - Kehong Chen
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China.
| | - Yani He
- Department of Nephrology, Daping Hospital, Army Medical Center, Army Medical University, No. 10 Changjiang Road, Chongqing, 400042, China.
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Li Z, Feng J, Yang S, Meng P, Li J, Li H, Gao X, Zhang Y. Lipopolysaccharide-induced inflammation in human peritoneal mesothelial cells is controlled by ERK1/2-CDK5-PPARγ axis. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:850. [PMID: 34164484 PMCID: PMC8184493 DOI: 10.21037/atm-21-1623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Background Peritonitis is a common complication in which the peritoneum becomes inflamed. Peroxisome proliferator-activated receptor (PPAR)γ agonists and extracellular signal-regulated kinases 1/2 (ERK1/2) inactivation have been found to restore damage caused by lipopolysaccharide-induced (LPS) inflammation. This study aimed to investigate the association between PPARγ and ERK1/2 in LPS-induced inflammation in peritonitis. Methods Human peritoneal mesothelial cells were maintained in Dulbecco’s Modified Eagle Medium and treated with LPS under a series of different concentrations and treatment times. Cellular interleukins-1βeta (IL-1β), cellular interleukins-6 (IL-6), cellular interleukins-12 (IL-12) were measured by enzyme-linked immunosorbent assay (ELISA) assay. Expression or activation of cyclin-dependent kinase (CDK)5, ERK1/2, and PPARγ was detected using quantitative real-time PCR and/or western blot. Results LPS induced dose- and time-dependent increments in the cellular IL-1β, IL-6, and IL-12 contents, cyclin-dependent kinase 5 (CDK5) expression, and PPARγSer273 phosphorylation. Treatment with 1 µg/mL LPS for 12 hours was the optimal experimental design for inflammation stimulation. The concentration of LPS over 1 µg/mL or treatment more than 12 hours reduced the inflammatory status. LPS stimulation also activated ERK1/2 and increased its interaction with CDK5. Further, ERK1/2 inhibition by AZD0364 prevented IL-1β, IL-6, IL-12, and CDK5 expression, as well as activation of ERK1/2 and phosphorylation of PPARγ, induced by LPS. Knockdown of CDK5 using its siRNA caused similar changes as AZD0364, minus ERK1/2 inactivation. Conclusions Our results suggested that LPS-induced inflammation in human peritoneal mesothelial cells can be partly suppressed by inhibiting the ERK1/2/CDK5/PPARγ axis.
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Affiliation(s)
- Zukai Li
- The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Junxia Feng
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University (People's Hospital of Huadu District), Guangzhou, China
| | - Shen Yang
- Department of Nephrology, Affiliated Huadu Hospital, Southern Medical University (People's Hospital of Huadu District), Guangzhou, China
| | - Ping Meng
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University (People's Hospital of Huadu District), Guangzhou, China
| | - Jingchun Li
- The Central Laboratory, Affiliated Huadu Hospital, Southern Medical University (People's Hospital of Huadu District), Guangzhou, China
| | - Hongyan Li
- Department of Nephrology, Affiliated Huadu Hospital, Southern Medical University (People's Hospital of Huadu District), Guangzhou, China
| | - Xuejuan Gao
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes and MOE Key Laboratory of Tumor Molecular Biology, Institute of Life and Health Engineering, Jinan University, Guangzhou, China
| | - Yunfang Zhang
- Department of Nephrology, Affiliated Huadu Hospital, Southern Medical University (People's Hospital of Huadu District), Guangzhou, China
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IL-17A as a Potential Therapeutic Target for Patients on Peritoneal Dialysis. Biomolecules 2020; 10:biom10101361. [PMID: 32987705 PMCID: PMC7598617 DOI: 10.3390/biom10101361] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/16/2020] [Accepted: 09/22/2020] [Indexed: 12/13/2022] Open
Abstract
Chronic kidney disease (CKD) is a health problem reaching epidemic proportions. There is no cure for CKD, and patients may progress to end-stage renal disease (ESRD). Peritoneal dialysis (PD) is a current replacement therapy option for ESRD patients until renal transplantation can be achieved. One important problem in long-term PD patients is peritoneal membrane failure. The mechanisms involved in peritoneal damage include activation of the inflammatory and immune responses, associated with submesothelial immune infiltrates, angiogenesis, loss of the mesothelial layer due to cell death and mesothelial to mesenchymal transition, and collagen accumulation in the submesothelial compact zone. These processes lead to fibrosis and loss of peritoneal membrane function. Peritoneal inflammation and membrane failure are strongly associated with additional problems in PD patients, mainly with a very high risk of cardiovascular disease. Among the inflammatory mediators involved in peritoneal damage, cytokine IL-17A has recently been proposed as a potential therapeutic target for chronic inflammatory diseases, including CKD. Although IL-17A is the hallmark cytokine of Th17 immune cells, many other cells can also produce or secrete IL-17A. In the peritoneum of PD patients, IL-17A-secreting cells comprise Th17 cells, γδ T cells, mast cells, and neutrophils. Experimental studies demonstrated that IL-17A blockade ameliorated peritoneal damage caused by exposure to PD fluids. This article provides a comprehensive review of recent advances on the role of IL-17A in peritoneal membrane injury during PD and other PD-associated complications.
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Hara T, Hiratsuka T, Etoh T, Itai Y, Kono Y, Shiroshita H, Shiraishi N, Inomata M. Intraperitoneal Phototherapy Suppresses Inflammatory Reactions in a Surgical Model of Peritonitis. J Surg Res 2020; 252:231-239. [PMID: 32299011 DOI: 10.1016/j.jss.2020.03.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/29/2020] [Accepted: 03/09/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND Standard treatment for diffuse peritonitis due to colorectal perforation may be insufficient to suppress inflammatory reaction in sepsis. Thus, developing new treatments is important. This study aimed to examine whether intraperitoneal irradiation by artificial sunlight suppresses inflammatory reaction in a lipopolysaccharide (LPS)-induced peritonitis model after surgical treatments. MATERIALS AND METHODS Mice were divided into naive, nontreatment (NT), and phototherapy (PT) groups. In the latter two groups, LPS was intraperitoneally administered to induce peritonitis and removed by intraperitoneal lavage after laparotomy. The PT group was irradiated with artificial sunlight intraperitoneally. We evaluated the local and systemic inflammatory reactions. Murine macrophages were irradiated with artificial sunlight after stimulation by LPS, and cell viability and expression of tumor necrotizing factor-α (TNF-α) were evaluated. RESULTS As a local inflammatory reaction, the whole cell count, the expression of interleukin-6 and TNF-α in the intra-abdominal fluid, and the peritoneal thickness were significantly lower in the PT group than in the NT group. As a systematic inflammatory reaction, the expression of serum TNF-α, granulocyte macrophage colony-stimulating factor, monocyte chemotactic protein-1, macrophage inflammatory protein (MIP)-1α, and MIP-1β were significantly lower in the PT group than in the NT group. Irradiation by artificial sunlight suppressed the expression of TNF-α in murine macrophages without affecting cell viability. CONCLUSIONS Intraperitoneal irradiation by artificial sunlight could suppress local and systemic inflammatory reactions in the LPS-induced peritonitis murine model. These effects may be associated with macrophage immune responses.
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Affiliation(s)
- Takao Hara
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan.
| | - Takahiro Hiratsuka
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan
| | - Tsuyoshi Etoh
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan
| | - Yusuke Itai
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan; Department of Diagnostic Pathology, Oita University Faculty of Medicine, Oita, Japan
| | - Yohei Kono
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan
| | - Hidefumi Shiroshita
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan
| | - Norio Shiraishi
- Department of Comprehensive Surgery for Community Medicine, Oita University Faculty of Medicine, Oita, Japan
| | - Masafumi Inomata
- Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan
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