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Guo J, Zhang H, Hu H, Zhao T, Ji H, Ma L, Lu J, Yuan J, Xu B. Silent information regulator 2 deficiency exacerbates chronic cold exposure-induced colonic injury and p65 activation in mice. Gene 2024; 907:148276. [PMID: 38360128 DOI: 10.1016/j.gene.2024.148276] [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: 11/21/2023] [Revised: 01/18/2024] [Accepted: 02/08/2024] [Indexed: 02/17/2024]
Abstract
Cold is a common stressor that threatens colonic health by affecting internal homeostasis. From the literature, Silent information regulator 2 (SIRT2) may have important roles during cold stress, but this conjecture requires investigation. To address this knowledge gap, we investigated the effects of SIRT2 on colonic injury in chronically cold-exposure mice. In a previous study, we showed that SIRT2 regulated p65 activation after cold exposure. In the current study, mice were exposed to 4 °C for 3 h/day for 3 weeks to simulate a chronic cold exposure environment. Chronic cold exposure shortened colon length, disrupted tight junctions in colonic epithelial tissue, and disordered colonic flora. Chronic cold exposure also increased p65 acetylation levels, promoted nuclear factor (NF)-κB activation, and increased the expression of its downstream pro-inflammatory factors, while SIRT2 knockdown aggravated the consequences of tissue structure disruption and increased inflammatory factors brought about by chronic cold exposure to some extent, but could alleviate the downregulation of colonic tight junction-related proteins to some extent. We also observed direct SIRT2 regulatory effects toward p65, and in Caco-2 cells treated with lipopolysaccharide (LPS), SIRT2 knockdown increased p65 acetylation levels and pro-inflammatory factor expression, while SIRT2 overexpression reversed these phenomena. Therefore, SIRT2 deletion exacerbated chronic cold exposure-induced colonic injury and p65 activation in mice. Mechanistically, p65 modification by SIRT2 via deacetylation may affect NF-κB signaling. These findings suggest that SIRT2 is a key target of colonic health maintenance under chronic cold exposure conditions.
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Affiliation(s)
- Jingru Guo
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Huaixiu Zhang
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Huijie Hu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Tianrui Zhao
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Hong Ji
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Li Ma
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jingjing Lu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Jianbin Yuan
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Bin Xu
- National Experimental Teaching Demonstration Center of Animal Medicine Foundation, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China.
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Wu J, Cheng H, Wang H, Zang G, Qi L, Lv X, Liu C, Zhu S, Zhang M, Cui J, Ueno H, Liu YJ, Suo J, Chen J. Correlation Between Immune Lymphoid Cells and Plasmacytoid Dendritic Cells in Human Colon Cancer. Front Immunol 2021; 12:601611. [PMID: 33708200 PMCID: PMC7940519 DOI: 10.3389/fimmu.2021.601611] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 01/11/2021] [Indexed: 12/26/2022] Open
Abstract
Background Innate lymphoid cells (ILCs), so far studied mostly in mouse models, are important tissue-resident innate immune cells that play important roles in the colorectal cancer microenvironment and maintain mucosal tissue homeostasis. Plasmacytoid dendritic cells (pDCs) present complexity in various tumor types and are correlated with poor prognosis. pDCs can promote HIV-1-induced group 3 ILC (ILC3) depletion through the CD95 pathway. However, the role of ILC3s in human colon cancer and their correlation with other immune cells, especially pDCs, remain unclear. Methods We characterized ILCs and pDCs in the tumor microenvironment of 58 colon cancer patients by flow cytometry and selected three patients for RNA sequencing. Results ILC3s were negatively correlated, and pDCs were positively correlated, with cancer pathological stage. There was a negative correlation between the numbers of ILC3s and pDCs in tumor tissues. RNA sequencing confirmed the correlations between ILC3s and pDCs and highlighted the potential function of many ILC- and pDC-associated differentially expressed genes in the regulation of tumor immunity. pDCs can induce apoptosis of ILC3s through the CD95 pathway in the tumor-like microenvironment. Conclusions One of the interactions between ILC3s and pDCs is via the CD95 pathway, which may help explain the role of ILC3s in colon cancer.
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Affiliation(s)
- Jing Wu
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
| | - Hang Cheng
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
- Department of Pediatrics, The First Hospital, Jilin University, Changchun, China
| | - Helei Wang
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
- Department of Stomach Colorectal Anal Surgery, The First Hospital, Jilin University, Changchun, China
| | - Guoxia Zang
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
| | - Lingli Qi
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
- Department of Pediatric Gastroenterology, The First Hospital, Jilin University, Changchun, China
| | - Xinping Lv
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
| | - Chunyan Liu
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
- Department of Gynecology, The First Hospital, Jilin University, Changchun, China
| | - Shan Zhu
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
| | - Mingyou Zhang
- Department of Cardiovascular Center, The First Hospital, Jilin University, Changchun, China
| | - Jiuwei Cui
- Cancer Center, The First Hospital, Jilin University, Changchun, China
| | - Hideki Ueno
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Yong-Jun Liu
- Department of Research and Development of Sanofi, Cambridge, MA, United States
| | - Jian Suo
- Department of Stomach Colorectal Anal Surgery, The First Hospital, Jilin University, Changchun, China
| | - Jingtao Chen
- Institute of Translational Medicine, The First Hospital, Jilin University, Changchun, China
- Key Laboratory of Organ Regeneration & Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
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Kabir M, Fofaria R, Arebi N, Bassett P, Tozer PJ, Hart AL, Thomas-Gibson S, Humphries A, Suzuki N, Saunders B, Warusavitarne J, Faiz O, Wilson A. Systematic review with meta-analysis: IBD-associated colonic dysplasia prognosis in the videoendoscopic era (1990 to present). Aliment Pharmacol Ther 2020; 52:5-19. [PMID: 32432797 DOI: 10.1111/apt.15778] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/02/2020] [Accepted: 04/17/2020] [Indexed: 12/14/2022]
Abstract
INTRODUCTION The prognosis of dysplasia in patients with IBD is largely determined from observational studies from the pre-videoendoscopic era (pre-1990s) that does not reflect recent advances in endoscopic imaging and resection. AIMS To better understand the risk of synchronous colorectal cancer and metachronous advanced neoplasia (ie high-grade dysplasia or cancer) associated with dysplasia diagnosed in the videoendoscopic era, and to stratify risk according to a lesion's morphology, endoscopic resection status or whether it was incidentally detected on biopsy of macroscopically normal colonic mucosa (ie invisible). METHODS A systematic search of original articles published between 1990 and February 2020 was performed. Eligible studies reported on incidence of advanced neoplasia at follow-up colectomy or colonoscopy for IBD-dysplasia patients. Quantitative and qualitative analyses were performed. RESULTS Thirty-three studies were eligible for qualitative analysis (five for the meta-analysis). Pooled estimated proportions of incidental synchronous cancers found at colectomy performed for a pre-operative diagnosis of visible high-grade dysplasia, invisible high-grade dysplasia, visible low-grade dysplasia and invisible low-grade dysplasia were 13.7% (95% CI 0.0-54.1), 11.4% (95% CI 4.6-20.3), 2.7% (95% CI 0.0-7.1) and 2.4% (95% CI 0.0-8.5) respectively. The lowest incidences of metachronous advanced neoplasia, for dysplasia not managed with immediate colectomy but followed up with surveillance, tended to be reported by the studies where high definition imaging and/or chromoendoscopy was used and endoscopic resection of visible dysplasia was histologically confirmed. CONCLUSIONS The prognosis of IBD-dysplasia diagnosed in the videoendoscopic era appears to have been improved but the quality of evidence remains low. Larger, prospective studies are needed to guide management. PROSPERO registration no: CRD42019105736.
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Affiliation(s)
- Misha Kabir
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | | | - Naila Arebi
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | | | - Phil J Tozer
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | - Ailsa L Hart
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | | | - Adam Humphries
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | - Noriko Suzuki
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | - Brian Saunders
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | | | - Omar Faiz
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
| | - Ana Wilson
- St Mark's Hospital, Harrow, UK.,Imperial College London, London, UK
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Pulusu SSR, Lawrance IC. Dysplasia and colorectal cancer surveillance in inflammatory bowel disease. Expert Rev Gastroenterol Hepatol 2017; 11:711-722. [PMID: 28475382 DOI: 10.1080/17474124.2017.1327347] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Inflammatory bowel disease (IBD) patients are at an increased risk of developing colorectal cancer (CRC), a devastating complication of which intestinal dysplasia is the precursor. Considerable progress has been made to determine CRC risk in IBD, identification & management of dysplasia and preventative methods. Traditionally, surveillance colonoscopies with random colonic biopsies was used. However recent data suggests that chromoendoscopy is a better method of surveillance. Using 5-aminosalicylic acid agents primarily for chemoprevention is an ongoing debate however, when prescribed along with other strategies to control inflammation, their use is considered of benefit. This review presents current understanding of risk factors of neoplasia focusing on dysplasia and preventive strategies. Areas covered: PubMed search was done using key words to assess current evidence. Along with genetics, risk factors, strategies that modify the risk of dysplasia, and CRC in IBD are discussed in detail. Expert commentary: The role of our strategies in modifying CRC risk needs further assessment. Future research should aim to fill knowledge gaps such as high quality evidence for Chromoendoscopy and development of molecular markers for dysplasia detection. Our ultimate goal would be to eliminate CRC and is possible by better understanding of key pathogenic mechanisms in IBD.
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Affiliation(s)
- Samba Siva Reddy Pulusu
- a Centre for Inflammatory Bowel Diseases , Saint John of God Hospital , Subiaco , WA , Australia
| | - Ian C Lawrance
- a Centre for Inflammatory Bowel Diseases , Saint John of God Hospital , Subiaco , WA , Australia.,b Harry Perkins Institute of Medical Research, School of Medicine and Pharmacology , University of Western Australia , Murdoch , WA , Australia
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