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Chen L, Zhong X, Cao W, Mao M, Li W, Yang H, Li M, Shi M, Zhang Y, Deng Y, Zu X, Liu J. JQ1 as a BRD4 Inhibitor Blocks Inflammatory Pyroptosis-Related Acute Colon Injury Induced by LPS. Front Immunol 2021; 12:609319. [PMID: 33679744 PMCID: PMC7930386 DOI: 10.3389/fimmu.2021.609319] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/06/2021] [Indexed: 12/12/2022] Open
Abstract
Endotoxemia is a severe inflammation response induced by infection especially bacterial endotoxin translocation, which severely increases mortality in combination with acute colon injury. Bromodomain-containing protein 4 (BRD4) is an important Bromo and Extra-Terminal (BET) protein to participate in inflammatory responses. However, it is still unknown about the specific connection between BRD4 and inflammation-related pyroptosis in endotoxemia colon. Here, through evaluating the mucous morphology and the expression of tight junction proteins such as occludin and ZO1, we found the upregulation of BRD4 in damaged colon with poor tight junction in an endotoxemia mouse model induced by lipopolysaccharides (LPS). Firstly, the BRD4 inhibitor JQ1 was used to effectively protect colon tight junction in endotoxemia. As detected, high levels of pro-inflammation cytokines IL6, IL1β and IL18 in endotoxemia colon were reversed by JQ1 pretreatment. In addition, JQ1 injection reduced endotoxemia-induced elevation of the phosphorylated NF κB and NLRP3/ASC/caspase 1 inflammasome complex in colon injury. Furthermore, activated pyroptosis markers gasdermins in endotoxemia colon were also blocked by JQ1 pretreatment. Together, our data indicate that BRD4 plays a critical role in regulating pyroptosis-related colon injury induced by LPS, and JQ1 as a BRD4 inhibitors can effectively protect colon from endotoxemia-induced inflammation injury.
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Affiliation(s)
- Ling Chen
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Xiaolin Zhong
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Wenyu Cao
- Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Mingli Mao
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Wei Li
- Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Hui Yang
- Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Menglin Li
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Mengmeng Shi
- Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Yuan Zhang
- Department of Pathology, Hengyang Medical School, University of South China, Hengyang, China
| | - Yincheng Deng
- Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, China
| | - Xuyu Zu
- Department of Tumor Research, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Jianghua Liu
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of University of South China, Hengyang, China
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Physiological and pathophysiological factors affecting the expression and activity of the drug transporter MRP2 in intestine. Impact on its function as membrane barrier. Pharmacol Res 2016; 109:32-44. [DOI: 10.1016/j.phrs.2016.04.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/15/2016] [Accepted: 04/17/2016] [Indexed: 12/15/2022]
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Lin CJ, Kang N, Lee JY, Lee HS, Dong CY. Visualizing and quantifying difference in cytoplasmic and nuclear metabolism in the hepatobiliary system in vivo. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:016020. [PMID: 25611866 DOI: 10.1117/1.jbo.20.1.016020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 12/30/2014] [Indexed: 06/04/2023]
Abstract
The liver is a major organ responsible for performing xenobiotic metabolism. In this process, xenobiotic is uptaken and processed in hepatocytes and subsequently excreted into the bile canaliculi. However, the intracellular heterogeneity in such metabolic processes is not known. We use the molecular probe 6-carboxyfluorescein diacetate (6-CFDA) to investigate xenobiotic metabolism in hepatocytes with intravital multiphoton fluorescence microscopy. 6-CFDA is processed by intracellular esterase to fluorescent 6-CF, which can be imaged and quantified. We found that compared to the nucleus, cytoplasmic 6-CF fluorescence intensity reached a maximum earlier (cytoplasm: 11.3 ± 4.4 min; nucleus: 14.7 ± 4.9 min) following 6-CFDA injection. We also found a slight difference in the rate of 6-CFDA metabolism as the rates of 6-CF decay at rates of 1.43 ± 0.75 and 1.27 ± 0.72 photons/min for the cytoplasm and nucleus, respectively. These results indicate that molecular transport to the nucleus is additionally hindered and can affect drug transport there
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Affiliation(s)
- Chih-Ju Lin
- National Taiwan University, Department of Physics, Taipei 106, Taiwan
| | - Ning Kang
- National Taiwan University, Department of Physics, Taipei 106, Taiwan
| | - Jian-Ye Lee
- National Taiwan University, Department of Physics, Taipei 106, Taiwan
| | - Hsuan-Shu Lee
- National Taiwan University Hospital and National Taiwan University, College of Medicine, Department of Internal Medicine, Taipei 100, TaiwancNational Taiwan University, Institute of Biotechnology, Taipei 106, Taiwan
| | - Chen-Yuan Dong
- National Taiwan University, Department of Physics, Taipei 106, TaiwandNational Taiwan University, Center for Optoelectronic Biomedicine, Taipei 106, TaiwaneNational Taiwan University, Center for Quantum Science and Engineering, Taipei 106, Taiwan
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Carvalho ATP, Fróes RSB, Esberard BC, Santos JCVC, Rapozo DCM, Grinman AB, Simão TA, Nicolau Neto P, Luiz RR, Carneiro AJV, Souza HSPD, Ribeiro-Pinto LF. Multidrug resistance 1 gene polymorphisms may determine Crohn's disease behavior in patients from Rio de Janeiro. Clinics (Sao Paulo) 2014; 69:327-34. [PMID: 24838898 PMCID: PMC4012237 DOI: 10.6061/clinics/2014(05)06] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 09/19/2013] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES Conflicting data from studies on the potential role of multidrug resistance 1 gene polymorphisms in inflammatory bowel disease may result from the analysis of genetically and geographically distinct populations. Here, we investigated whether multidrug resistance 1 gene polymorphisms are associated with inflammatory bowel diseases in patients from Rio de Janeiro. METHODS We analyzed 123 Crohn's disease patients and 83 ulcerative colitis patients to determine the presence of the multidrug resistance 1 gene polymorphisms C1236T, G2677T and C3435T. In particular, the genotype frequencies of Crohn's disease and ulcerative colitis patients were analyzed. Genotype-phenotype associations with major clinical characteristics were established, and estimated risks were calculated for the mutations. RESULTS No significant difference was observed in the genotype frequencies of the multidrug resistance 1 G2677T/A and C3435T polymorphisms between Crohn's disease and ulcerative colitis patients. In contrast, the C1236T polymorphism was significantly more common in Crohn's disease than in ulcerative colitis (p = 0.047). A significant association was also found between the multidrug resistance 1 C3435T polymorphism and the stricturing form of Crohn's disease (OR: 4.13; p = 0.009), whereas no association was found with penetrating behavior (OR: 0.33; p = 0.094). In Crohn's disease, a positive association was also found between the C3435T polymorphism and corticosteroid resistance/refractoriness (OR: 4.14; p = 0.010). However, no significant association was found between multidrug resistance 1 gene polymorphisms and UC subphenotypic categories. CONCLUSION The multidrug resistance 1 gene polymorphism C3435T is associated with the stricturing phenotype and an inappropriate response to therapy in Crohn's disease. This association with Crohn's disease may support additional pathogenic roles for the multidrug resistance 1 gene in regulating gut-microbiota interactions and in mediating fibrosis. Understanding the effects of several drugs associated with multidrug resistance 1 gene variants may aid in the selection of customized therapeutic regimens.
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Affiliation(s)
- Ana Teresa P Carvalho
- Disciplina de Gastroenterologia e Endoscopia Digestiva, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Renata S B Fróes
- Disciplina de Gastroenterologia e Endoscopia Digestiva, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Barbara C Esberard
- Disciplina de Gastroenterologia e Endoscopia Digestiva, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Juliana C V C Santos
- Instituto Nacional de Câncer, Programa de Carcinogênese Molecular, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Davy C M Rapozo
- Instituto Nacional de Câncer, Programa de Carcinogênese Molecular, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Ana B Grinman
- Disciplina de Gastroenterologia e Endoscopia Digestiva, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Tatiana A Simão
- Laboratório de Toxicologia e Biologia Molecular, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Pedro Nicolau Neto
- Laboratório de Toxicologia e Biologia Molecular, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
| | - Ronir R Luiz
- Instituto de Epidemiologia e Saúde Coletiva, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Antonio José V Carneiro
- Departamento de Clínica Médica, Serviço de Gastroenterologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Heitor S P de Souza
- Departamento de Clínica Médica, Serviço de Gastroenterologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Luis Felipe Ribeiro-Pinto
- Laboratório de Toxicologia e Biologia Molecular, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil
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