1
|
Xing D, Zheng T, Chen X, Xie Z. Yellow Teas Protect against DSS-Induced Ulcerative Colitis by Inhibiting TLR4/NF-κB/NLRP3 Inflammasome in Mice. Foods 2024; 13:2843. [PMID: 39272608 PMCID: PMC11395497 DOI: 10.3390/foods13172843] [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: 07/20/2024] [Revised: 08/28/2024] [Accepted: 09/06/2024] [Indexed: 09/15/2024] Open
Abstract
Yellow tea (YT), a slightly fermented tea with a unique yellowing process and mellow taste, is becoming widely popular. Currently, the YT includes bud yellow tea (BYT), small-leaf yellow tea (SYT), and large-leaf yellow tea (LYT) based on maturity of raw materials. Previous studies have shown that YT has outstanding potential in preventing metabolic syndrome. However, the distinct effects and mechanisms of different types of YT on ulcerative colitis (UC) are still unclear. This study investigated the effects and mechanisms of continuous or intermittent intervention of three yellow tea water extracts (YTEs) on dextran sulfate sodium (DSS)-induced ulcerative colitis in CD-1 mice. The results showed that YTE intervention significantly improves the syndrome of DSS-induced UC in mice. Mechanistic studies reveal that YTEs increase the expression levels of tight junction (TJ) proteins and reduce the levels of pro-inflammatory cytokines in the colon by inactivating TLR4/NF-κB/NLRP3. YTE treatment protected intestinal barrier integrity and reduced serum lipopolysaccharide (LPS) levels. Interestingly, our results indicate that large-leaf yellow tea (LYT) has a better alleviating effect than BYT and SYT. YTE intervention before DSS administration has a certain degree of preventive effect on ulcerative colitis, while continuous YTE intervention after DSS induction has a significant reversing effect on the damage caused by DSS. Our results indicated that drinking YT may have preventive and therapeutic effect on UC, especially drinking LYT.
Collapse
Affiliation(s)
- Dawei Xing
- Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, School of Biological and Environmental Engineering, Chaohu University, 1 Bantang Road, Hefei 238024, China
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
| | - Tao Zheng
- Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, School of Biological and Environmental Engineering, Chaohu University, 1 Bantang Road, Hefei 238024, China
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
| | - Xiaoju Chen
- Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, School of Biological and Environmental Engineering, Chaohu University, 1 Bantang Road, Hefei 238024, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
| |
Collapse
|
2
|
Wang J, Guo Z, Shen M, Xie Q, Xiang H. Potential application mechanism of traditional Chinese medicine in treating immune checkpoint inhibitor-induced colitis. Front Immunol 2024; 15:1366489. [PMID: 38660314 PMCID: PMC11039877 DOI: 10.3389/fimmu.2024.1366489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 03/08/2024] [Indexed: 04/26/2024] Open
Abstract
Cancer ranks among the foremost causes of mortality worldwide, posing a significant threat to human lives. The advent of tumor immunotherapy has substantially transformed the therapeutic landscape for numerous advanced malignancies, notably non-small cell lung cancer and melanoma. However, as immune checkpoint inhibitors (ICIs) are increasingly applied in clinical settings, a spectrum of undesired reactions, termed immune-related adverse events (irAEs), has emerged. These adverse reactions are associated with immunotherapy and can result in varying degrees of harm to the human body. Among these reactions, Immune checkpoint inhibitor-induced colitis (ICIIC) stands out as one of the most prevalent clinical adverse events. In contemporary times, traditional Chinese medicine (TCM) has demonstrated remarkable efficacy in addressing various maladies. Consequently, investigating the potential application and mechanisms of Chinese medicine in countering immune checkpoint inhibitor-induced colitis assumes significant importance in the treatment of this condition.
Collapse
Affiliation(s)
- Jing Wang
- College of Traditional Chinese Medicine, Shandong Second Medical University, Weifang, China
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Ziyue Guo
- College of Traditional Chinese Medicine, Shandong Second Medical University, Weifang, China
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Mengyi Shen
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
- Shangdong First Medical University & Shangdong Academy of Medical Sciences, Jinan, China
| | - Qi Xie
- Department of Oncology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, Shandong Lung Cancer Institute, Jinan, China
| | - Hongjie Xiang
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
- Department of Oncology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, Shandong Lung Cancer Institute, Jinan, China
| |
Collapse
|
3
|
Liu H, Chen R, Wen S, Li Q, Lai X, Zhang Z, Sun L, Sun S, Cao F. Tea (Camellia sinensis) ameliorates DSS-induced colitis and liver injury by inhibiting TLR4/NF-κB/NLRP3 inflammasome in mice. Biomed Pharmacother 2023; 158:114136. [PMID: 36535201 DOI: 10.1016/j.biopha.2022.114136] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/03/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
The gut-liver axis is a bidirectional relationship between the gut with its microbiota and the hepatic. Ulcerative colitis (UC) disrupts the intestinal barrier and influx of intestinal microorganisms and their products into the liver, which trigger liver injury. Tea consumption is associated with a low incidence of UC in Asian countries. In this study, we revealed the mechanisms of six types of tea water extracts (TWEs) obtained from the leaves of Camellia sinensis on the dextran sodium sulfate (DSS)-induced colitis and liver injury in mice. The TWEs significantly restored mucin production and increased the expression levels of tight junction (TJ) proteins such as zonula occludens-1 (ZO-1), occluding, and claudin-1. In addition, TWEs also reduced the levels of pro-inflammatory cytokines in the colon and liver tissue by inactivating the NF-κB/NLRP3. Moreover, TEWs treatment promoted the integrity of the intestinal barrier to reduce serum lipopolysaccharide (LPS) levels, thereby reducing liver injury caused by intestinal microbial translocation and LPS induction. Analysis of 16 S rRNA microbial sequencing revealed that tea water extracts (TWEs) restored the DSS-induced gut dysbiosis. Interestingly, our results showed that the degree of fermentation of tea leaves was negatively associated with the alleviation of DSS-induced colitis effects, and there was also an overall negative trend with colitis-induced liver injury, except for black tea. Taken together, tea consumption mitigated DSS-induced colitis and liver injury in mice via inhibiting the TLR4/NF-κB/NLRP3 inflammasome pathway.
Collapse
Affiliation(s)
- Haiyan Liu
- College of Horticulture, South China Agricultural University, Guangzhou 510000, China
| | - Ruohong Chen
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China
| | - Shuai Wen
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China
| | - Qiuhua Li
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China
| | - Xingfei Lai
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China
| | - Zhenbiao Zhang
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China
| | - Lingli Sun
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China
| | - Shili Sun
- Tea Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China.
| | - Fanrong Cao
- College of Horticulture, South China Agricultural University, Guangzhou 510000, China.
| |
Collapse
|
4
|
Liu J, Lin H, Cao M, Lin T, Lin A, Xu W, Wang H, He J, Li Y, Tang H, Zhang B. Shifts and importance of viable bacteria in treatment of DSS-induced ulcerative colitis mice with FMT. Front Cell Infect Microbiol 2023; 13:1124256. [PMID: 36814445 PMCID: PMC9939747 DOI: 10.3389/fcimb.2023.1124256] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/16/2023] [Indexed: 02/09/2023] Open
Abstract
Background and Aims Ulcerative colitis (UC) has become a global public health concern, and is in urgent need of novel therapies. Fecal microbiota transplantation (FMT) targeting gut microbiota has recently been applied to the treatment of UC. Despite its recent successes, it is still largely unknown how FMT functionally modulates the gut microbiota and improves the disease. Methods We prospectively collected fecal samples from the 40 mice (30 mice for dextran sulfate sodium (DSS)-induced, 10 for controls), followed by Propidium monoazide treatment for 16S rRNA gene sequencing. These 30 mice were divided equally into 3 groups, which were transplanted with original donor microbiota (DO), inactivated donor microbiota (DI) and saline, respectively. Subsequently, we used 16S rRNA gene sequencing to analyze the viable gut bacteria of ulcerative colitis (UC) mice and histological analysis to evaluate the effects of fecal microbiota transplantation (FMT) with viable microbiota. Results We demonstrated that the community structure of viable bacteria was significantly different from fecal bacteria based on total DNA. Furthermore, the intestinal viable microbiota and colonic mucosal structure of mice were significantly changed by DSS induction. The histological analysis showed that only the mice treated with original donor microbiota group (HF) achieved a significant improvement. Compared with inactivated donor microbiota group (IF) and saline (NF), Lactobacillus and Halomonas were significantly enriched in the HF group. Conclusion We inferred that only live bacteria from human donor reversed the histopathology and symptoms of UC in mice and altered the gut microbiota. The activity of gut microbiota in donor samples should be considered in FMT and that detailed analysis of viable microbiota is essential to understand the mechanisms by which FMT produces therapeutic effects in the future.
Collapse
Affiliation(s)
- Jinglong Liu
- Department of Gastroenterology, Shanxi Provincial People’s Hospital, Taiyuan, China
| | - Hao Lin
- Center for Microecological Medical Technology, Xiamen Institute of Union Respiratory Health, Xiamen, China
| | - Man Cao
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Tan Lin
- Center for Microecological Medical Technology, Xiamen Institute of Union Respiratory Health, Xiamen, China
| | - Aiqiang Lin
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
| | - Wei Xu
- Center for Microecological Medical Technology, Xiamen Institute of Union Respiratory Health, Xiamen, China
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
| | - Han Wang
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
| | - Jianquan He
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
| | - Yuantao Li
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
- *Correspondence: Yuantao Li, ; Hailing Tang, ; Bangzhou Zhang,
| | - Hailing Tang
- Division of Gastroenterology, Xi’an Central Hospital, Xi’an, China
- *Correspondence: Yuantao Li, ; Hailing Tang, ; Bangzhou Zhang,
| | - Bangzhou Zhang
- Center for Research and Development, Xiamen Treatgut Biotechnology Co., Ltd., Xiamen, China
- Department of Gastroenterology, The Second Affiliated Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou, China
- School of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
- *Correspondence: Yuantao Li, ; Hailing Tang, ; Bangzhou Zhang,
| |
Collapse
|
5
|
Liu Y, Li BG, Su YH, Zhao RX, Song P, Li H, Cui XH, Gao HM, Zhai RX, Fu XJ, Ren X. Potential activity of Traditional Chinese Medicine against Ulcerative colitis: A review. JOURNAL OF ETHNOPHARMACOLOGY 2022; 289:115084. [PMID: 35134488 DOI: 10.1016/j.jep.2022.115084] [Citation(s) in RCA: 67] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/26/2022] [Accepted: 02/03/2022] [Indexed: 05/25/2023]
Abstract
ETHNIC PHARMACOLOGICAL RELEVANCE Plant materials are used as complementary and alternative therapies all over the world for the treatment of various diseases. Ulcerative colitis (UC), a chronic nonspecific inflammatory bowel disease listed as one of the modern refractory diseases by the World Health Organization, has a long course, is challenging to cure, and is prone to cause cancer. Recent years have witnessed a growing trend of applying traditional Chinese medicine (TCM) to UC. AIM OF THIS REVIEW This review presents an overview of the pathogenesis of UC and reports the therapeutic effect of TCM on UC (including TCM prescriptions, single TCM, and treatments using TCM ingredients) to provide a theoretical basis for the use of TCM in treating UC. METHODS We performed a collection and collation of relevant scientific articles from different scientific databases regarding TCM and its usefulness in treating UC. In this paper, the therapeutic effect of TCM is summarized and analyzed according to the existing experimental and clinical research. RESULTS There are positive signs that TCM primarily regulates inflammatory cytokines, intestinal flora, and the immune system, and also protects the intestinal mucosa. Hence, it can play a role in treating UC. CONCLUSION TCM has a definite curative effect in the treatment of UC. It can alleviate and treat UC in a variety of ways. We should take syndrome differentiation and treatment differentiation as the basis. With the help of modern medicine, TCM's clinical curative effects can be enhanced for the treatment of UC.
Collapse
Affiliation(s)
- Yang Liu
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China; Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China
| | - Bao-Guo Li
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Yu-Hua Su
- Department of Immunology and Rheumatology, Affiliated Hospital of Weifang Medical College, Weifang, 261000, China
| | - Ruo-Xi Zhao
- TCM Specialty Class 4, 2018, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Peng Song
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China; Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China
| | - Hui Li
- Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China
| | - Xin-Hai Cui
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China; Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China
| | - Hong-Mei Gao
- Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China
| | - Run-Xiang Zhai
- Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China
| | - Xian-Jun Fu
- Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China.
| | - Xia Ren
- Marine Traditional Chinese Medicine Research Center, Qingdao Academy Shandong University of Traditional Chinese Medicine, Qingdao, 266114, China; Shandong Engineering and Technology Research Center of Traditional Chinese Medicine, Jinan, 250355, China.
| |
Collapse
|
6
|
Aximujiang K, Kaheman K, Wushouer X, Wu G, Ahemaiti A, Yunusi K. Lactobacillus acidophilus and HKL Suspension Alleviates Ulcerative Colitis in Rats by Regulating Gut Microbiota, Suppressing TLR9, and Promoting Metabolism. Front Pharmacol 2022; 13:859628. [PMID: 35600873 PMCID: PMC9118348 DOI: 10.3389/fphar.2022.859628] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 03/28/2022] [Indexed: 12/12/2022] Open
Abstract
Ulcerative colitis (UC) is a chronic non-specific inflammatory bowel disease with complex pathogenesis. The intestinal flora disturbance affects the homeostasis of the intestinal environment, leading to metabolic imbalance and immune abnormalities of the host, contributing to the perpetuation of intestinal inflammation. We suggest that the combination of anti-inflammatory therapy and the regulation of intestinal flora balance may help in the treatment process. Previously, we used a combination treatment consisting of Lactobacillus acidophilus (Lac) and Chinese medicine Huan Kui Le (HKL) suspension in a UC rat model, where the combined intervention was more effective than either treatment alone. Herein, the mechanism of action of this combined treatment has been investigated using 16S rRNA sequencing, immunohistochemistry, and ELISA methods in the colon, and untargeted metabolomics profiling in serum. Colon protein expression levels of IL-13 and TGF-β were upregulated, whereas those of TLR9 and TLR4 were downregulated, consistent with an anti-inflammatory effect. In addition, gut microbiota structure changed, shown by a decrease in opportunistic pathogens correlated with intestinal inflammation, such as Klebsiella and Escherichia-Shigella, and an increase in beneficial bacteria such as Bifidobacterium. The latter correlated positively with IL-13 and TGF-β and negatively with IFN-γ. Finally, this treatment alleviated the disruption of the metabolic profile observed in UC rats by increasing short-chain fatty acid (SCFA)-producing bacteria in the colonic epithelium. This combination treatment also affected the metabolism of lactic acid, creatine, and glycine and inhibited the growth of Klebsiella. Overall, we suggest that treatment combining probiotics and traditional Chinese medicine is a novel strategy beneficial in UC that acts by modulating gut microbiota and its metabolites, TLR9, and cytokines in different pathways.
Collapse
Affiliation(s)
- Kasimujiang Aximujiang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi, China
- College of Pharmacy, Xinjiang Medical University, Urumqi, China
| | - Kuerbannaimu Kaheman
- Department of Rehabilitation Medicine, First Affiliated Hospital in Xinjiang Medical University, Urumqi, China
| | - Xilinguli Wushouer
- Department of Biology, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi, China
| | - Guixia Wu
- Department of Physiology, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi, China
| | - Abulaiti Ahemaiti
- The Functional Center, School of Basic Medical Sciences, Xinjiang Medical University, Urumqi, China
| | - Kurexi Yunusi
- Uygur Medical College, Xinjiang Medical University, Urumqi, China
| |
Collapse
|
7
|
Xu Y, Tian Y, Wang Y, Yang J, Li F, Wan X, Ouyang M. Human antigen R (HuR) and Cold inducible RNA-binding protein (CIRP) influence intestinal mucosal barrier function in ulcerative colitis by competitive regulation on Claudin1. Biofactors 2021; 47:427-443. [PMID: 33638934 DOI: 10.1002/biof.1719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 01/28/2021] [Indexed: 11/09/2022]
Abstract
To investigate the effects of RNA-binding proteins cold-inducible RNA binding protein (CIRP) and human antigen R (HuR) on expression of Claudin1 and mucosal barrier function in ulcerative colitis (UC). The clinical specimens of UC patients and healthy volunteers were collected. In the clinical experiments, the expressions of CIRP, Claudin1, and HuR, along with their correlations in tissues of UC patients were analyzed by qRT-PCR, Western blot and Pearson correlation coefficient, respectively. The chi-square test was utilized to assess the relevance between CIRP/HuR/Claudin1 level and clinicopathological characteristics of UC patients. The in vitro and in vivo models of UC were established by lipopolysaccharide treatment or dextran sulfate sodium injection. For cell experiments, after loss- and gain-of-function, the roles of CIRP or HuR in the apoptosis and proliferation of enterocytes were examined by flow cytometry and CCK-8 assay. The intestinal epithelial barrier function was inspected after determination on transepithelial electrical resistance value, horseradish peroxidase permeability and expressions of tight junction proteins (Occludin, ZO-1, and JAM-1). The relationship between HuR, CIRP, and Claudin1 was performed by RNA immunoprecipitation and dual-luciferase reporter gene assay. For in vivo experiments, the disease activity index score, weight loss and colon length of mice were assessed to observe the effect of CIRP or HuR on the UC mouse models. Histological analysis of colon tissues was conducted by H&E staining. FITC-dextran tracking was applied to inspect the intestinal mucosal barrier function of UC mouse models. In this study, high expression of CIRP and low expressions of HuR and Claudin1 were observed in patients, cells and mouse models of UC. The expressions of CIRP, HuR, and Claudin1 were correlated with the severity of patients with UC. There was a negative correlation between CIRP and Claudin1, and as a positive correlation between HuR and Claudin1. Claudin1 can be suppressed by CIRP, while enhanced by HuR. HuR and CIRP can competitively bind to Claudin1. HuR upregulation or CIRP downregulation promoted proliferation, suppressed apoptosis and ameliorated the damage of the barrier function in enterocytes. The in vivo experiments verified that the ameliorated damage of the intestinal mucosal barrier function in UC mice occurred with HuR overexpression or CIRP knockdown. CIRP and HuR confer pivotal effect on the intestinal mucosal barrier function of UC through competitively binding to Claudin1 mRNA.
Collapse
Affiliation(s)
- Yan Xu
- Department of Health Management Center, Xiangya Hospital, Central South University, Changsha, China
| | - Yuxi Tian
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Ying Wang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, China
| | - Junwen Yang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, China
| | - Fujun Li
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoping Wan
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Miao Ouyang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|