1
|
Zi Z, Rao Y. Discoveries of GPR39 as an evolutionarily conserved receptor for bile acids and of its involvement in biliary acute pancreatitis. SCIENCE ADVANCES 2024; 10:eadj0146. [PMID: 38306436 PMCID: PMC10836733 DOI: 10.1126/sciadv.adj0146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 01/04/2024] [Indexed: 02/04/2024]
Abstract
Acute pancreatitis (AP) is one of the most common gastrointestinal diseases. Bile acids (BAs) were proposed to be a cause of AP nearly 170 years ago, though the underlying mechanisms remain unclear. Here, we report that two G protein-coupled receptors, GPR39 and GHSR, mediated cellular responses to BAs. Our results revealed GPR39 as an evolutionarily conserved receptor for BAs, particularly 3-O-sulfated lithocholic acids. In cultured cell lines, GPR39 is sufficient for BA-induced Ca2+ elevation. In pancreatic acinar cells, GPR39 mediated BA-induced Ca2+ elevation and necrosis. Furthermore, AP induced by BAs was significantly reduced in GPR39 knockout mice. Our findings provide in vitro and in vivo evidence demonstrating that GPR39 is necessary and sufficient to mediate BA signaling, highlighting its involvement in biliary AP pathogenesis, and suggesting it as a promising therapeutic target for biliary AP.
Collapse
Affiliation(s)
- Zhentao Zi
- Chinese Institutes for Medical Research, Beijing (CIMR, Beijing) and the State Key Laboratory of Digestive Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Peking-Tsinghua Center for Life Sciences, PKU-IDG/McGovern Institute for Brain Research, School of Life Sciences, School of Pharmaceutical Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Yi Rao
- Chinese Institutes for Medical Research, Beijing (CIMR, Beijing) and the State Key Laboratory of Digestive Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Peking-Tsinghua Center for Life Sciences, PKU-IDG/McGovern Institute for Brain Research, School of Life Sciences, School of Pharmaceutical Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
- Changping Laboratory, Chinese Institute of Brain Research Beijing and Research Unit of Medical Neurobiology, Chinese Academy of Medical Sciences, Beijing 102206, China
| |
Collapse
|
2
|
Malhotra P, Palanisamy R, Caparros-Martin JA, Falasca M. Bile Acids and Microbiota Interplay in Pancreatic Cancer. Cancers (Basel) 2023; 15:3573. [PMID: 37509236 PMCID: PMC10377396 DOI: 10.3390/cancers15143573] [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: 06/05/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/30/2023] Open
Abstract
Evidence suggests the involvement of the microbiota, including oral, intra-tumoral and gut, in pancreatic cancer progression and response to therapy. The gut microbiota modulates the bile acid pool and is associated with maintaining host physiology. Studies have shown that the bile acid/gut microbiota axis is dysregulated in pancreatic cancer. Bile acid receptor expression and bile acid levels are dysregulated in pancreatic cancer as well. Studies have also shown that bile acids can cause pancreatic cell injury and facilitate cancer cell proliferation. The microbiota and its metabolites, including bile acids, are also altered in other conditions considered risk factors for pancreatic cancer development and can alter responses to chemotherapeutic treatments, thus affecting patient outcomes. Altogether, these findings suggest that the gut microbial and/or bile acid profiles could also serve as biomarkers for pancreatic cancer detection. This review will discuss the current knowledge on the interaction between gut microbiota interaction and bile acid metabolism in pancreatic cancer.
Collapse
Affiliation(s)
- Pratibha Malhotra
- Metabolic Signalling Group, Curtin Health Innovation Research Institute, Curtin Medical School, Curtin University, Perth, WA 6102, Australia
| | - Ranjith Palanisamy
- Metabolic Signalling Group, Curtin Health Innovation Research Institute, Curtin Medical School, Curtin University, Perth, WA 6102, Australia
| | | | - Marco Falasca
- Metabolic Signalling Group, Curtin Health Innovation Research Institute, Curtin Medical School, Curtin University, Perth, WA 6102, Australia
| |
Collapse
|
3
|
Song TJ, Ke J, Chen F, Zhang JY, Zhang C, Chen HY. Effect of SNHG11/miR-7-5p/PLCB1 Axis on Acute Pancreatitis through Inhibiting p38MAPK Pathway. Cells 2022; 12:cells12010065. [PMID: 36611865 PMCID: PMC9818913 DOI: 10.3390/cells12010065] [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: 11/05/2022] [Revised: 12/09/2022] [Accepted: 12/17/2022] [Indexed: 12/28/2022] Open
Abstract
Acute pancreatitis (AP) is an inflammatory disease of the pancreas. A growing number of studies have shown that long noncoding RNAs (lncRNAs) play an important role in AP progression. Here, we aimed to elucidate the role of Small Nucleolar RNA Host Gene 11(SNHG11) and its underlying molecular mechanisms behind AP progression. The in vivo and in vitro AP cell models were established by retrograde injection of sodium taurocholate and caerulein stimulation into AR42J cells and HPDE6-C7 cells, respectively. A bioinformatics website predicted the relationship between SNHG11, miR-7-5p, and Phospholipase C Beta 1(PLCB1) and validated it with a dual-luciferase reporter assay and an RNA immunoprecipitation (RIP) assay. AR42J cells and HPDE6-C7 cells were transfected with an overexpression of plasmids or shRNA to investigate the effects of the SNHG11/miR-7-5p/PLCB1 axis on cell proliferation and apoptosis, inflammatory cytokine secretion, and acute pancreatitis. Low expression of SNHG11 and PLCB1 and high expression of miR-7-5p were observed in AP pancreatic tissue and AP cell models. SNHG11 overexpression inhibited apoptosis and inflammatory responses induced by caerulein. Simultaneously, we discovered that SNHG11 regulates PLCB1 expression by sponging miR-7-5p. PLCB1 overexpression abrogated inflammatory damage exacerbated by miR-7-5p enrichment. In addition, the SNHG11/miR-7-5p/PLCB1 axis could be involved in caerulein-induced inflammatory injury by participating in the p38MAPK signaling pathway. The overexpressed SNHG11/miR-7-5p/PLCB1 axis can inhibit AP progression by participating in the p38MAPK signaling pathway, thereby providing a potential therapeutic target and therapeutic direction for AP therapy.
Collapse
Affiliation(s)
- Tian-Jiao Song
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Emergency, Fujian Provincial Hospital, Fuzhou 350001, China
- Fujian Provincial Key Laboratory of Emergency Medicine, Fujian Provincial Institute of Emergency Medicine, Fujian Emergency Medical Center, Fuzhou 350001, China
| | - Jun Ke
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Emergency, Fujian Provincial Hospital, Fuzhou 350001, China
- Fujian Provincial Key Laboratory of Emergency Medicine, Fujian Provincial Institute of Emergency Medicine, Fujian Emergency Medical Center, Fuzhou 350001, China
| | - Feng Chen
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Emergency, Fujian Provincial Hospital, Fuzhou 350001, China
- Fujian Provincial Key Laboratory of Emergency Medicine, Fujian Provincial Institute of Emergency Medicine, Fujian Emergency Medical Center, Fuzhou 350001, China
- Correspondence:
| | - Jiu-Yun Zhang
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Emergency, Fujian Provincial Hospital, Fuzhou 350001, China
- Fujian Provincial Key Laboratory of Emergency Medicine, Fujian Provincial Institute of Emergency Medicine, Fujian Emergency Medical Center, Fuzhou 350001, China
| | - Chun Zhang
- Department of Hepatobiliary and Pancreatic Surgery, Mindong Hospital, Ningde, Fujian Medical University, No. 89, Heshan Road, Fuan 355000, China
| | - Hong-Yi Chen
- Shengli Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Emergency, Fujian Provincial Hospital, Fuzhou 350001, China
- Fujian Provincial Key Laboratory of Emergency Medicine, Fujian Provincial Institute of Emergency Medicine, Fujian Emergency Medical Center, Fuzhou 350001, China
| |
Collapse
|
4
|
Oliveira SRBD, Franco ÁX, Quaresma MP, de Carvalho CMM, da Cunha Jácome Marques F, da Silva Pantoja P, Mendonça VA, da Silva Osterne VJ, Correia JLA, Assreuy AMS, de Souza MHLP, do Nascimento KS, Cavada BS, Criddle DN, Soares PMG. Anti-inflammatory and anti-necrotic effects of lectins from Canavalia ensiformis and Canavalia brasiliensis in experimental acute pancreatitis. Glycoconj J 2022; 39:599-608. [PMID: 35239112 DOI: 10.1007/s10719-022-10048-w] [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: 11/09/2021] [Revised: 01/14/2022] [Accepted: 02/09/2022] [Indexed: 11/04/2022]
Abstract
Lectins isolated from Canavalia ensiformis (ConA) and Canavalia brasiliensis (ConBr) are promising molecules to prevent cell death. Acute pancreatitis, characterized by acinar cell necrosis and inflammation, presents significant morbidity and mortality. This study has investigated the effects of ConA and ConBr in experimental acute pancreatitis and pancreatic acinar cell death induced by bile acid. Pancreatitis was induced by retrograde pancreatic ductal injection of 3% sodium taurocholate (Na-TC) in male Swiss mice. ConA or ConBr (0.1, 1 or 10 mg/kg) were intravenously applied to mice 1 h and 12 h after induction. After 24 h, the severity of pancreatitis was evaluated by serum amylase and lipase, histopathological changes and myeloperoxidase assay. Pancreatic acinar cells were incubated with ConA (200 µg/ml) or ConBr (200 µg/ml) and taurolithocholic acid 3-sulfate (TLCS; 500 µM). Necrosis and changes in mitochondrial membrane potential (ΔѰm) were detected by fluorescence confocal microscopy. Treatment (post-insult) with ConA and ConBr decreased pancreatic damage caused by retrograde injection of Na-TC in mice, reducing pancreatic neutrophil infiltration, edema and necrosis. In addition, ConA and ConBr decreased pancreatic acinar cell necrosis and depolarization of ΔѰm caused by TLCS. The inhibition of necrosis was prevented by the lectin domain blockade. In conclusion, ConA and ConBr markedly inhibited in vitro and in vivo damage, effects partly dependent on the interaction with mannose residues on acinar cells. These data support the potential application of these proteins for treatment of acute pancreatitis.
Collapse
Affiliation(s)
| | - Álvaro Xavier Franco
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Marielle Pires Quaresma
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | | | | | - Vanessa Azevedo Mendonça
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | | | | | | | | | - Benildo Sousa Cavada
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - David Neil Criddle
- Department of Molecular Physiology & Cell Signalling, ISMIB, University of Liverpool, Liverpool, UK
| | | |
Collapse
|
5
|
Gao L, Chong E, Pendharkar S, Hong J, Windsor JA, Ke L, Li W, Phillips A. The Effects of NLRP3 Inflammasome Inhibition in Experimental Acute Pancreatitis: A Systematic Review and Meta-Analysis. Pancreas 2022; 51:13-24. [PMID: 35195590 DOI: 10.1097/mpa.0000000000001971] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
ABSTRACT Acute pancreatitis (AP) is an inflammatory disease, and NLRP3 inflammasome activation is involved in the pathogenesis of AP. Previous research showed that inhibition of NLRP3 inflammasome may exert protective effects on animal models of AP and reduces disease severity. The aim of this systematic review and meta-analysis is to evaluate the effects of drug treatment of NLRP3 inflammasome on the outcomes of experimental AP. PubMed, Embase, Medline, and Web of Science databases were searched for relevant articles without language restrictions. The main outcomes for this study included local pancreatic injury, the incidence of systemic inflammatory responses, and the incidence of organ failure. Twenty-eight animal studies including 556 animals with AP were included in the meta-analysis. Compared with controls, inhibition of NLRP3 inflammasome significantly reduced the pancreatic histopathological scores, serum amylase, and lipase levels. In addition, inhibition of NLRP3 inflammasome reduced the levels of circulating inflammatory cytokines, as well as mitigating severity of AP-associated acute lung injury and acute intestinal injury. To conclude, inhibition of NLRP3 inflammasome has protective effects on AP by mitigating organ injury and systemic inflammation in animal studies, indicating that NLRP3 inflammasome holds promise as a target for specific AP therapy.
Collapse
Affiliation(s)
| | - Eric Chong
- Surgical and Translational Research Centre, Faculty of Medical and Health Sciences, School of Medicine, University of Auckland, Auckland, New Zealand
| | - Sayali Pendharkar
- Surgical and Translational Research Centre, Faculty of Medical and Health Sciences, School of Medicine, University of Auckland, Auckland, New Zealand
| | | | | | - Lu Ke
- From the Center of Severe Acute Pancreatitis, Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Weiqin Li
- From the Center of Severe Acute Pancreatitis, Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | | |
Collapse
|
6
|
Gao L, Dong X, Gong W, Huang W, Xue J, Zhu Q, Ma N, Chen W, Fu X, Gao X, Lin Z, Ding Y, Shi J, Tong Z, Liu T, Mukherjee R, Sutton R, Lu G, Li W. Acinar cell NLRP3 inflammasome and gasdermin D (GSDMD) activation mediates pyroptosis and systemic inflammation in acute pancreatitis. Br J Pharmacol 2021; 178:3533-3552. [PMID: 33871879 DOI: 10.1111/bph.15499] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 02/22/2021] [Accepted: 04/06/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND AND PURPOSE Pyroptosis is a lytic form of pro-inflammatory cell death characterised as caspase 1 dependent with canonical NLRP3 inflammasome-induced gasdermin D (GSDMD) activation. We aimed to investigate the role of acinar pyroptotic cell death in pancreatic injury and systemic inflammation in AP. EXPERIMENTAL APPROACH Pancreatic acinar pyroptotic cell death pathway activation upon pancreatic toxin stimulation in vitro and in vivo was investigated. Effects of pharmacological (NLRP3 and caspase-1 inhibitors), constitutive (Nlrp3-/- , Casp1-/- and Gsdmd-/- ) and acinar cell conditional (Pdx1Cre Nlrp3Δ/Δ and Pdx1Cre GsdmdΔ/Δ ) genetic inhibition on pyroptotic acinar cell death, pancreatic necrosis and systemic inflammation were assessed using mouse AP models (caerulein, sodium taurocholate and l-arginine). Effects of Pdx1Cre GsdmdΔ/Δ versus myeloid conditional knockout (Lyz2Cre GsdmdΔ/Δ ) and Gsdmd-/- versus receptor-interacting protein 3 (RIP3) inhibitor were compared in CER-AP. KEY RESULTS There was consistent pyroptotic acinar cell death upon pancreatic toxin stimulation both in vitro and in vivo, which was significantly reduced by pharmacological or genetic pyroptosis inhibition. Pdx1Cre GsdmdΔ/Δ but not Lyz2Cre GsdmdΔ/Δ mice showed significantly reduced pyroptotic acinar cell death, pancreatic necrosis and systemic inflammation in caerulein-AP. Co-application of RIP3 inhibitor on Gsdmd-/- mice further increased protection on caerulein-AP. CONCLUSION AND IMPLICATIONS This work demonstrates a critical role for NLRP3 inflammasome and GSDMD activation-mediated pyroptosis in acinar cells, linking pancreatic necrosis and systemic inflammation in AP. Targeting pyroptosis signalling pathways holds promise for specific AP therapy.
Collapse
Affiliation(s)
- Lin Gao
- Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xiaowu Dong
- Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Nanjing Medical University, Nanjing, China
| | - Weijuan Gong
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Wei Huang
- Department and Laboratory of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre and West China-Liverpool Biomedical Research Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Xue
- State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Centre, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qingtian Zhu
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Nan Ma
- Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Weiwei Chen
- Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xianghui Fu
- Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Centre of Biotherapy, Chengdu, China
| | - Xiang Gao
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Hepatopancreatobiliary Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Centre, Nanjing University, Nanjing, China
| | - Zhaoyu Lin
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Hepatopancreatobiliary Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Centre, Nanjing University, Nanjing, China
| | - Yanbing Ding
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Juanjuan Shi
- State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Centre, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhihui Tong
- Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Tingting Liu
- Department and Laboratory of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre and West China-Liverpool Biomedical Research Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Rajarshi Mukherjee
- Liverpool Pancreatitis Research Group, Liverpool University Hospitals NHS Foundation Trust and Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Robert Sutton
- Liverpool Pancreatitis Research Group, Liverpool University Hospitals NHS Foundation Trust and Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Guotao Lu
- Pancreatic Center, Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Weiqin Li
- Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.,Center of Severe Acute Pancreatitis (CASP), Department of Critical Care Medicine, Jinling Hospital, Nanjing Medical University, Nanjing, China
| |
Collapse
|
7
|
Tran QT, Tran VH, Sendler M, Doller J, Wiese M, Bolsmann R, Wilden A, Glaubitz J, Modenbach JM, Thiel FG, de Freitas Chama LL, Weiss FU, Lerch MM, Aghdassi AA. Role of Bile Acids and Bile Salts in Acute Pancreatitis: From the Experimental to Clinical Studies. Pancreas 2021; 50:3-11. [PMID: 33370017 PMCID: PMC7748038 DOI: 10.1097/mpa.0000000000001706] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 10/27/2020] [Indexed: 12/12/2022]
Abstract
ABSTRACT Acute pancreatitis (AP) is one of the most common gastroenterological disorders leading to hospitalization. It has long been debated whether biliary AP, about 30% to 50% of all cases, is induced by bile acids (BAs) when they reach the pancreas via reflux or via the systemic blood circulation.Besides their classical function in digestion, BAs have become an attractive research target because of their recently discovered property as signaling molecules. The underlying mechanisms of BAs have been investigated in various studies. Bile acids are internalized into acinar cells through specific G-protein-coupled BA receptor 1 and various transporters. They can further act via different receptors: the farnesoid X, ryanodine, and inositol triphosphate receptor. Bile acids induce a sustained Ca2+ influx from the endoplasmic reticulum and release of Ca2+ from acidic stores into the cytosol of acinar cells. The overload of intracellular Ca2+ results in mitochondrial depolarization and subsequent acinar cell necrosis. In addition, BAs have a biphasic effect on pancreatic ductal cells. A more detailed characterization of the mechanisms through which BAs contribute to the disease pathogenesis and severity will greatly improve our understanding of the underlying pathophysiology and may allow for the development of therapeutic and preventive strategies for gallstone-inducedAP.
Collapse
Affiliation(s)
- Quang Trung Tran
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
- Department of Internal Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Van Huy Tran
- Department of Internal Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Matthias Sendler
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Julia Doller
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Mats Wiese
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Robert Bolsmann
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Anika Wilden
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Juliane Glaubitz
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | | | | | | | - Frank Ulrich Weiss
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Markus M. Lerch
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Ali A. Aghdassi
- From the Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| |
Collapse
|
8
|
The role of Ca2+ signalling in the physiology and pathophysiology of exocrine pancreas. CURRENT OPINION IN PHYSIOLOGY 2020. [DOI: 10.1016/j.cophys.2020.07.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
9
|
Swain SM, Romac JMJ, Shahid RA, Pandol SJ, Liedtke W, Vigna SR, Liddle RA. TRPV4 channel opening mediates pressure-induced pancreatitis initiated by Piezo1 activation. J Clin Invest 2020; 130:2527-2541. [PMID: 31999644 PMCID: PMC7190979 DOI: 10.1172/jci134111] [Citation(s) in RCA: 114] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 01/23/2020] [Indexed: 12/24/2022] Open
Abstract
Elevated pressure in the pancreatic gland is the central cause of pancreatitis following abdominal trauma, surgery, endoscopic retrograde cholangiopancreatography, and gallstones. In the pancreas, excessive intracellular calcium causes mitochondrial dysfunction, premature zymogen activation, and necrosis, ultimately leading to pancreatitis. Although stimulation of the mechanically activated, calcium-permeable ion channel Piezo1 in the pancreatic acinar cell is the initial step in pressure-induced pancreatitis, activation of Piezo1 produces only transient elevation in intracellular calcium that is insufficient to cause pancreatitis. Therefore, how pressure produces a prolonged calcium elevation necessary to induce pancreatitis is unknown. We demonstrate that Piezo1 activation in pancreatic acinar cells caused a prolonged elevation in intracellular calcium levels, mitochondrial depolarization, intracellular trypsin activation, and cell death. Notably, these effects were dependent on the degree and duration of force applied to the cell. Low or transient force was insufficient to activate these pathological changes, whereas higher and prolonged application of force triggered sustained elevation in intracellular calcium, leading to enzyme activation and cell death. All of these pathological events were rescued in acinar cells treated with a Piezo1 antagonist and in acinar cells from mice with genetic deletion of Piezo1. We discovered that Piezo1 stimulation triggered transient receptor potential vanilloid subfamily 4 (TRPV4) channel opening, which was responsible for the sustained elevation in intracellular calcium that caused intracellular organelle dysfunction. Moreover, TRPV4 gene-KO mice were protected from Piezo1 agonist- and pressure-induced pancreatitis. These studies unveil a calcium signaling pathway in which a Piezo1-induced TRPV4 channel opening causes pancreatitis.
Collapse
Affiliation(s)
- Sandip M. Swain
- Department of Medicine, Duke University, Durham, North Carolina, USA
| | | | - Rafiq A. Shahid
- Department of Medicine, Duke University, Durham, North Carolina, USA
| | | | | | - Steven R. Vigna
- Department of Medicine, Duke University, Durham, North Carolina, USA
- Department of Cell Biology, Duke University, Durham, North Carolina, USA
| | - Rodger A. Liddle
- Department of Medicine, Duke University, Durham, North Carolina, USA
- Department of Veterans Affairs Health Care System, Durham, North Carolina, USA
| |
Collapse
|
10
|
Jakubowska MA, Ferdek PE, Gerasimenko OV, Gerasimenko JV, Petersen OH. Nitric oxide signals are interlinked with calcium signals in normal pancreatic stellate cells upon oxidative stress and inflammation. Open Biol 2017; 6:rsob.160149. [PMID: 27488376 PMCID: PMC5008014 DOI: 10.1098/rsob.160149] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 07/05/2016] [Indexed: 12/19/2022] Open
Abstract
The mammalian diffuse stellate cell system comprises retinoid-storing cells capable of remarkable transformations from a quiescent to an activated myofibroblast-like phenotype. Activated pancreatic stellate cells (PSCs) attract attention owing to the pivotal role they play in development of tissue fibrosis in chronic pancreatitis and pancreatic cancer. However, little is known about the actual role of PSCs in the normal pancreas. These enigmatic cells have recently been shown to respond to physiological stimuli in a manner that is markedly different from their neighbouring pancreatic acinar cells (PACs). Here, we demonstrate the capacity of PSCs to generate nitric oxide (NO), a free radical messenger mediating, for example, inflammation and vasodilatation. We show that production of cytosolic NO in PSCs is unambiguously related to cytosolic Ca2+ signals. Only stimuli that evoke Ca2+ signals in the PSCs elicit consequent NO generation. We provide fresh evidence for the striking difference between signalling pathways in PSCs and adjacent PACs, because PSCs, in contrast to PACs, generate substantial Ca2+-mediated and NOS-dependent NO signals. We also show that inhibition of NO generation protects both PSCs and PACs from necrosis. Our results highlight the interplay between Ca2+ and NO signalling pathways in cell–cell communication, and also identify a potential therapeutic target for anti-inflammatory therapies.
Collapse
Affiliation(s)
- Monika A Jakubowska
- Medical Research Council Group, School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK
| | - Pawel E Ferdek
- Medical Research Council Group, School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK
| | - Oleg V Gerasimenko
- Medical Research Council Group, School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK
| | - Julia V Gerasimenko
- Medical Research Council Group, School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK
| | - Ole H Petersen
- Medical Research Council Group, School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK Systems Immunity Research Institute, Cardiff University, Cardiff CF14 4XN, Wales, UK
| |
Collapse
|
11
|
Yang Z, Yang W, Lu M, Li Z, Qiao X, Sun B, Zhang W, Xue D. Role of the c-Jun N-terminal kinase signaling pathway in the activation of trypsinogen in rat pancreatic acinar cells. Int J Mol Med 2017; 41:1119-1126. [PMID: 29207022 DOI: 10.3892/ijmm.2017.3266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 11/08/2017] [Indexed: 11/06/2022] Open
Abstract
Bile acid causes trypsinogen activation in pancreatic acinar cells through a complex process. Additional research is required to further elucidate which signaling pathways affect trypsinogen activation when activated. the changes in the whole‑genome expression profile of AR42J cells under the effect of taurolithocholic acid 3‑sulfate (TLC‑S) were investigated. Furthermore, gene groups that may play a regulatory role were analyzed using the modular approach of biological networks. The aim of the present study was to improve our understanding of the changes in TLC‑S‑stimulated AR42J cells through a genetic functional modular analysis. whole‑genome expression profile chip arrays were applied to detect genes that were differentially expressed in pancreatic acinar AR42J cells treated with TLC‑S for 20 min. Based on the human protein reference database, a protein‑protein interaction network was obtained, which was then processed by CFinder software to derive 14 modules. Among these 14 modules, the gene ontology biological processes enrichment analysis identified two as modules of interest. Kyoto encyclopedia of genes and genomes map analysis revealed that MAP2K4, MAPK8 and FLNA are part of the c-Jun N-terminal kinase (JNK) pathway. The JNK signaling pathway is involved in regulating trypsinogen activation in rat pancreatic AR42J cells. Next, a regulatory network of seven kinase inhibitors was constructed. SP600125 is an ATP‑competitive, efficient, selective and reversible inhibitor of JNK. the results were verified by four sets of experiments and demonstrated that trypsinogen activation is mediated by the JNK signaling pathway in the pathogenesis of acute pancreatitis (AP). The present study provided a useful reference for better understanding the pathogenesis of AP and identifying new targets to regulate trypsinogen activation, in addition to providing valuable information for the treatment of AP.
Collapse
Affiliation(s)
- Zhengpeng Yang
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Weiguang Yang
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Ming Lu
- Department of Surgery, David Geffen School of Medicine, University of Califonia at Los Angeles, Los Angeles, CA 90095, USA
| | - Zhituo Li
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Xin Qiao
- Department of Surgery, David Geffen School of Medicine, University of Califonia at Los Angeles, Los Angeles, CA 90095, USA
| | - Bei Sun
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Weihui Zhang
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Dongbo Xue
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| |
Collapse
|
12
|
Mosztbacher D, Farkas N, Solymár M, Pár G, Bajor J, Szűcs &A, Czimmer J, Márta K, Mikó A, Rumbus Z, Varjú P, Hegyi P, Párniczky A. Restoration of energy level in the early phase of acute pediatric pancreatitis. World J Gastroenterol 2017; 23:957-963. [PMID: 28246469 PMCID: PMC5311105 DOI: 10.3748/wjg.v23.i6.957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 11/21/2016] [Accepted: 01/11/2017] [Indexed: 02/06/2023] Open
Abstract
Acute pancreatitis (AP) is a serious inflammatory disease with rising incidence both in the adult and pediatric populations. It has been shown that mitochondrial injury and energy depletion are the earliest intracellular events in the early phase of AP. Moreover, it has been revealed that restoration of intracellular ATP level restores cellular functions and defends the cells from death. We have recently shown in a systematic review and meta-analysis that early enteral feeding is beneficial in adults; however, no reviews are available concerning the effect of early enteral feeding in pediatric AP. In this minireview, our aim was to systematically analyse the literature on the treatment of acute pediatric pancreatitis. The preferred reporting items for systematic review (PRISMA-P) were followed, and the question was drafted based on participants, intervention, comparison and outcomes: P: patients under the age of twenty-one suffering from acute pancreatitis; I: early enteral nutrition (per os and nasogastric- or nasojejunal tube started within 48 h); C: nil per os therapy; O: length of hospitalization, need for treatment at an intensive care unit, development of severe AP, lung injury (including lung oedema and pleural effusion), white blood cell count and pain score on admission. Altogether, 632 articles (PubMed: 131; EMBASE: 501) were found. After detailed screening of eligible papers, five of them met inclusion criteria. Only retrospective clinical trials were available. Due to insufficient information from the authors, it was only possible to address length of hospitalization as an outcome of the study. Our mini-meta-analysis showed that early enteral nutrition significantly (SD = 0.806, P = 0.034) decreases length of hospitalization compared with nil per os diet in acute pediatric pancreatitis. In this minireview, we clearly show that early enteral nutrition, started within 24-48 h, is beneficial in acute pediatric pancreatitis. Prospective studies and better presentation of research are crucially needed to achieve a higher level of evidence.
Collapse
|
13
|
Peng T, Peng X, Huang M, Cui J, Zhang Y, Wu H, Wang C. Serum calcium as an indicator of persistent organ failure in acute pancreatitis. Am J Emerg Med 2017; 35:978-982. [PMID: 28291705 DOI: 10.1016/j.ajem.2017.02.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 02/03/2017] [Indexed: 02/06/2023] Open
Abstract
AIM Decreased level of serum calcium was commonly seen in critical illness. Hypocalcemia was significantly more frequent in patients with severe form of acute pancreatitis (AP), and a negative correlation was observed between endotoxemia and serum calcium in AP. AP patients with persistent organ failure (POF) show an extremely high mortality. The association underlying calcium and POF in AP has not been characterized. METHODS We conducted a retrospective cohort study of adult patients who presented within 72hours from symptom onset of AP at our center between January 2014 and May 2015. Demographic parameters on admission, organ failure assessment, laboratory data and in-hospital mortality were compared between patients with and without POF. Uni-and multi-variate logistic regression analyses were utilized to evaluated the predictive ability of serum calcium. RESULTS A total of 128 consecutive AP patients, including 29 with POF, were included. Compared to patients without POF, patients with POF showed a significantly lower value of serum calcium on admission (2.11±0.46 vs. 1.55±0.36mmol/L, P<0.001). After multivariate logistic analysis, serum calcium remained an independent risk factor for POF (Hazard ratio 0.21, 95% confident interval: 0.08-0.58; P=0.002). A calcium value of 1.97mmol/L predicted POF with an area under the curve (AUC) of 0.888, a sensitivity with 89.7% and specificity with 74.8%, respectively. CONCLUSION Our results indicate that serum calcium on admission is independently associated with POF in AP and may serve as a potential prognostic factor.
Collapse
Affiliation(s)
- Tao Peng
- Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China
| | - Xin Peng
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China
| | - Min Huang
- Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China
| | - Jing Cui
- Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China
| | - Yushun Zhang
- Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China.
| | - Heshui Wu
- Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China
| | - Chunyou Wang
- Pancreatic Disease Institute, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, People's Republic of China
| |
Collapse
|
14
|
Huang W, Cane MC, Mukherjee R, Szatmary P, Zhang X, Elliott V, Ouyang Y, Chvanov M, Latawiec D, Wen L, Booth DM, Haynes AC, Petersen OH, Tepikin AV, Criddle DN, Sutton R. Caffeine protects against experimental acute pancreatitis by inhibition of inositol 1,4,5-trisphosphate receptor-mediated Ca2+ release. Gut 2017; 66:301-313. [PMID: 26642860 PMCID: PMC5284483 DOI: 10.1136/gutjnl-2015-309363] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 08/31/2015] [Accepted: 09/22/2015] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Caffeine reduces toxic Ca2+ signals in pancreatic acinar cells via inhibition of inositol 1,4,5-trisphosphate receptor (IP3R)-mediated signalling, but effects of other xanthines have not been evaluated, nor effects of xanthines on experimental acute pancreatitis (AP). We have determined effects of caffeine and its xanthine metabolites on pancreatic acinar IP3R-mediated Ca2+ signalling and experimental AP. DESIGN Isolated pancreatic acinar cells were exposed to secretagogues, uncaged IP3 or toxins that induce AP and effects of xanthines, non-xanthine phosphodiesterase (PDE) inhibitors and cyclic adenosine monophosphate and cyclic guanosine monophosphate (cAMP/cGMP) determined. The intracellular cytosolic calcium concentration ([Ca2+]C), mitochondrial depolarisation and necrosis were assessed by confocal microscopy. Effects of xanthines were evaluated in caerulein-induced AP (CER-AP), taurolithocholic acid 3-sulfate-induced AP (TLCS-AP) or palmitoleic acid plus ethanol-induced AP (fatty acid ethyl ester AP (FAEE-AP)). Serum xanthines were measured by liquid chromatography-mass spectrometry. RESULTS Caffeine, dimethylxanthines and non-xanthine PDE inhibitors blocked IP3-mediated Ca2+ oscillations, while monomethylxanthines had little effect. Caffeine and dimethylxanthines inhibited uncaged IP3-induced Ca2+ rises, toxin-induced Ca2+ release, mitochondrial depolarisation and necrotic cell death pathway activation; cAMP/cGMP did not inhibit toxin-induced Ca2+ rises. Caffeine significantly ameliorated CER-AP with most effect at 25 mg/kg (seven injections hourly); paraxanthine or theophylline did not. Caffeine at 25 mg/kg significantly ameliorated TLCS-AP and FAEE-AP. Mean total serum levels of dimethylxanthines and trimethylxanthines peaked at >2 mM with 25 mg/kg caffeine but at <100 µM with 25 mg/kg paraxanthine or theophylline. CONCLUSIONS Caffeine and its dimethylxanthine metabolites reduced pathological IP3R-mediated pancreatic acinar Ca2+ signals but only caffeine ameliorated experimental AP. Caffeine is a suitable starting point for medicinal chemistry.
Collapse
Affiliation(s)
- Wei Huang
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK,Department of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Matthew C Cane
- Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Rajarshi Mukherjee
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Peter Szatmary
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Xiaoying Zhang
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Victoria Elliott
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK
| | - Yulin Ouyang
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Michael Chvanov
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Diane Latawiec
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK
| | - Li Wen
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Integrated Traditional Chinese and Western Medicine, Sichuan Provincial Pancreatitis Centre, West China Hospital, Sichuan University, Chengdu, China
| | - David M Booth
- Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Andrea C Haynes
- Immuno-Inflammation Therapeutic Area Unit, GlaxoSmithKline, Stevenage, UK
| | - Ole H Petersen
- Cardiff School of Biosciences, Cardiff University, Cardiff, UK
| | - Alexei V Tepikin
- Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - David N Criddle
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK,Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Robert Sutton
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, University of Liverpool, Liverpool, UK
| |
Collapse
|
15
|
Ferdek PE, Jakubowska MA, Gerasimenko JV, Gerasimenko OV, Petersen OH. Bile acids induce necrosis in pancreatic stellate cells dependent on calcium entry and sodium-driven bile uptake. J Physiol 2016; 594:6147-6164. [PMID: 27406326 PMCID: PMC5088250 DOI: 10.1113/jp272774] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 07/04/2016] [Indexed: 01/05/2023] Open
Abstract
KEY POINTS Acute biliary pancreatitis is a sudden and severe condition initiated by bile reflux into the pancreas. Bile acids are known to induce Ca2+ signals and necrosis in isolated pancreatic acinar cells but the effects of bile acids on stellate cells are unexplored. Here we show that cholate and taurocholate elicit more dramatic Ca2+ signals and necrosis in stellate cells compared to the adjacent acinar cells in pancreatic lobules; whereas taurolithocholic acid 3-sulfate primarily affects acinar cells. Ca2+ signals and necrosis are strongly dependent on extracellular Ca2+ as well as Na+ ; and Na+ -dependent transport plays an important role in the overall bile acid uptake in pancreatic stellate cells. Bile acid-mediated pancreatic damage can be further escalated by bradykinin-induced signals in stellate cells and thus killing of stellate cells by bile acids might have important implications in acute biliary pancreatitis. ABSTRACT Acute biliary pancreatitis, caused by bile reflux into the pancreas, is a serious condition characterised by premature activation of digestive enzymes within acinar cells, followed by necrosis and inflammation. Bile acids are known to induce pathological Ca2+ signals and necrosis in acinar cells. However, bile acid-elicited signalling events in stellate cells remain unexplored. This is the first study to demonstrate the pathophysiological effects of bile acids on stellate cells in two experimental models: ex vivo (mouse pancreatic lobules) and in vitro (human cells). Sodium cholate and taurocholate induced cytosolic Ca2+ elevations in stellate cells, larger than those elicited simultaneously in the neighbouring acinar cells. In contrast, taurolithocholic acid 3-sulfate (TLC-S), known to induce Ca2+ oscillations in acinar cells, had only minor effects on stellate cells in lobules. The dependence of the Ca2+ signals on extracellular Na+ and the presence of sodium-taurocholate cotransporting polypeptide (NTCP) indicate a Na+ -dependent bile acid uptake mechanism in stellate cells. Bile acid treatment caused necrosis predominantly in stellate cells, which was abolished by removal of extracellular Ca2+ and significantly reduced in the absence of Na+ , showing that bile-dependent cell death was a downstream event of Ca2+ signals. Finally, combined application of TLC-S and the inflammatory mediator bradykinin caused more extensive necrosis in both stellate and acinar cells than TLC-S alone. Our findings shed new light on the mechanism by which bile acids promote pancreatic pathology. This involves not only signalling in acinar cells but also in stellate cells.
Collapse
Affiliation(s)
- Pawel E Ferdek
- Medical Research Council Group, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AX, Wales, UK. ,
| | - Monika A Jakubowska
- Medical Research Council Group, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AX, Wales, UK
| | - Julia V Gerasimenko
- Medical Research Council Group, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AX, Wales, UK
| | - Oleg V Gerasimenko
- Medical Research Council Group, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AX, Wales, UK
| | - Ole H Petersen
- Medical Research Council Group, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AX, Wales, UK
- Systems Immunity Research Institute, Cardiff University, Cardiff, CF14 4XN, Wales, UK
| |
Collapse
|
16
|
Zhu J, Dong X, Liu Q, Wu C, Wang Q, Long Z, Li L. Hydrophobic bile acids relax rat detrusor contraction via inhibiting the opening of the Na⁺/Ca²⁺ exchanger. Sci Rep 2016; 6:21358. [PMID: 26892434 PMCID: PMC4759538 DOI: 10.1038/srep21358] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 01/18/2016] [Indexed: 12/16/2022] Open
Abstract
Hydrophobic bile acids (BAs) are thought to inhibit smooth muscle contractility in several organs. The present study was undertaken to investigate the effects of hydrophobic BAs on the detrusor contractility of rat bladder and to explore the possible mechanism. Lithocholic acid (LCA) treatment increased the micturition interval and induced a concentration-dependent relaxation of bladder detrusor strips. In addition, LCA reduced the concentration of intracellular free Ca(2+)([Ca(2+)]i) and inhibited both the outward and inward Na(+)/Ca(2+) exchanger (NCX) current (INCX) in primary isolated smooth muscle cells (SMCs). To further investigate the mechanism of action of LCA, several pharmacologic agents were used. We found that the NCX inhibitor 3',4'-Dichlorobenzamil (DCB) can significantly inhibit the relaxation of detrusor strips and a reduction of the [Ca(2+)]i induced by LCA, while the antagonist of muscarinic receptor and the agonist of the G protein-coupled bile acid receptor (TGR5) and the farnesoid X receptor (FXR) had no effect. In conclusion, these data suggest that the relaxation of rat detrusor induced by hydrophobic BAs is mediated by NCX. Further research is needed to carry out to demonstrate the possible pathway and provide a potential new strategy to investigation for the treatment of the low urinary tract syndromes.
Collapse
Affiliation(s)
- Jingzhen Zhu
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Xingyou Dong
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Qian Liu
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Chao Wu
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Qingqing Wang
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Zhou Long
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Longkun Li
- Department of Urology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| |
Collapse
|
17
|
Kowal JM, Haanes KA, Christensen NM, Novak I. Bile acid effects are mediated by ATP release and purinergic signalling in exocrine pancreatic cells. Cell Commun Signal 2015; 13:28. [PMID: 26050734 PMCID: PMC4459444 DOI: 10.1186/s12964-015-0107-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 05/26/2015] [Indexed: 02/06/2023] Open
Abstract
Background In many cells, bile acids (BAs) have a multitude of effects, some of which may be mediated by specific receptors such the TGR5 or FXR receptors. In pancreas systemic BAs, as well as intra-ductal BAs from bile reflux, can affect pancreatic secretion. Extracellular ATP and purinergic signalling are other important regulators of similar secretory mechanisms in pancreas. The aim of our study was to elucidate whether there is interplay between ATP and BA signalling. Results Here we show that CDCA (chenodeoxycholic acid) caused fast and concentration-dependent ATP release from acini (AR42J) and duct cells (Capan-1). Taurine and glycine conjugated forms of CDCA had smaller effects on ATP release in Capan-1 cells. In duct monolayers, CDCA stimulated ATP release mainly from the luminal membrane; the releasing mechanisms involved both vesicular and non-vesicular secretion pathways. Duct cells were not depleted of intracellular ATP with CDCA, but acinar cells lost some ATP, as detected by several methods including ATP sensor AT1.03YEMK. In duct cells, CDCA caused reversible increase in the intracellular Ca2+ concentration [Ca2 +]i, which could be significantly inhibited by antagonists of purinergic receptors. The TGR5 receptor, expressed on the luminal side of pancreatic ducts, was not involved in ATP release and Ca2+ signals, but could stimulate Na+/Ca2+ exchange in some conditions. Conclusions CDCA evokes significant ATP release that can stimulate purinergic receptors, which in turn increase [Ca2+]i. The TGR5 receptor is not involved in these processes but can play a protective role at high intracellular Ca2+ conditions. We propose that purinergic signalling could be taken into consideration in other cells/organs, and thereby potentially explain some of the multifaceted effects of BAs. Electronic supplementary material The online version of this article (doi:10.1186/s12964-015-0107-9) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Justyna M Kowal
- Department of Biology, Section for Cell Biology and Physiology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark.
| | - Kristian A Haanes
- Department of Biology, Section for Cell Biology and Physiology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark. .,Present address: Department of Clinical Experimental Research, Glostrup Research Institute, Copenhagen University Hospital, Glostrup, Denmark.
| | - Nynne M Christensen
- Department of Biology, Section for Cell Biology and Physiology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark.
| | - Ivana Novak
- Department of Biology, Section for Cell Biology and Physiology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100, Copenhagen, Denmark.
| |
Collapse
|
18
|
Voronina S, Okeke E, Parker T, Tepikin A. How to win ATP and influence Ca(2+) signaling. Cell Calcium 2014; 55:131-8. [PMID: 24613709 DOI: 10.1016/j.ceca.2014.02.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 02/10/2014] [Accepted: 02/11/2014] [Indexed: 12/11/2022]
Abstract
This brief review discusses recent advances in studies of mitochondrial Ca(2+) signaling and considers how the relationships between mitochondria and Ca(2+) responses are shaped in secretory epithelial cells. Perhaps the more precise title of this review could have been "How to win ATP and influence Ca(2+) signaling in secretory epithelium with emphasis on exocrine secretory cells and specific focus on pancreatic acinar cells". But "brevity is a virtue" and the authors hope that many of the mechanisms discussed are general and applicable to other tissues and cell types. Among these mechanisms are mitochondrial regulation of Ca(2+) entry and the role of mitochondria in the formation of localized Ca(2+) responses. The roles of Ca(2+) signaling in the physiological adjustment of bioenergetics and in mitochondrial damage are also briefly discussed.
Collapse
Affiliation(s)
- Svetlana Voronina
- Department of Cellular and Molecular Physiology, The Physiological Laboratory, Institute of Translational Medicine, The University of Liverpool, Crown Street, Liverpool L69 3BX, UK
| | - Emmanuel Okeke
- Department of Cellular and Molecular Physiology, The Physiological Laboratory, Institute of Translational Medicine, The University of Liverpool, Crown Street, Liverpool L69 3BX, UK
| | - Tony Parker
- Department of Cellular and Molecular Physiology, The Physiological Laboratory, Institute of Translational Medicine, The University of Liverpool, Crown Street, Liverpool L69 3BX, UK
| | - Alexei Tepikin
- Department of Cellular and Molecular Physiology, The Physiological Laboratory, Institute of Translational Medicine, The University of Liverpool, Crown Street, Liverpool L69 3BX, UK.
| |
Collapse
|
19
|
Wiemuth D, Sahin H, Falkenburger BH, Lefèvre CMT, Wasmuth HE, Gründer S. BASIC--a bile acid-sensitive ion channel highly expressed in bile ducts. FASEB J 2012; 26:4122-30. [PMID: 22735174 DOI: 10.1096/fj.12-207043] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Brain liver intestine Na+ channel (BLINaC) is an ion channel of the DEG/ENaC gene family of unknown function. BLINaC from rats (rBLINaC) and humans (INaC) is inactive at rest, and its mode of activation has remained unclear. Here, we show that the BLINaC protein localizes to cholangiocytes, epithelial cells that line bile ducts. Moreover, we provide evidence that rBLINaC and INaC are robustly activated by bile acids, in particular chenodeoxycholic acid and hyodeoxycholic acid (EC50=2.1±0.05 mM). Thus, BLINaC appears to be an epithelial cation channel of bile ducts sensitive to physiological concentrations of bile acids. BLINaC is related to acid-sensing ion channels (ASICs) and to the epithelial Na+ channel (ENaC) and shares ligand activation with ASICs and epithelial localization with ENaC. Therefore, based on the close homology of BLINaC to ASICs and its activation by bile acids, we propose to rename BLINaC bile acid-sensitive ion channel (BASIC).
Collapse
Affiliation(s)
- Dominik Wiemuth
- Department of Physiology, RWTH Aachen University, Pauwelsstrasse 30, 52074 Aachen, Germany.
| | | | | | | | | | | |
Collapse
|
20
|
Ferdek PE, Gerasimenko JV, Peng S, Tepikin AV, Petersen OH, Gerasimenko OV. A novel role for Bcl-2 in regulation of cellular calcium extrusion. Curr Biol 2012; 22:1241-6. [PMID: 22704985 PMCID: PMC3396842 DOI: 10.1016/j.cub.2012.05.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 04/02/2012] [Accepted: 05/01/2012] [Indexed: 01/12/2023]
Abstract
The antiapoptotic protein Bcl-2 [1, 2] plays important roles in Ca2+ signaling [3] by influencing inositol triphosphate receptors and regulating Ca2+-induced Ca2+ release [4–6]. Here we investigated whether Bcl-2 affects Ca2+ extrusion in pancreatic acinar cells. We specifically blocked the Ca2+ pumps in the endoplasmic reticulum and assessed the rate at which the cells reduced an elevated cytosolic Ca2+ concentration after a period of enhanced Ca2+ entry. Because external Ca2+ was removed and endoplasmic reticulum Ca2+ pumps were blocked, Ca2+ extrusion was the only process responsible for recovery. Cells lacking Bcl-2 restored the basal cytosolic Ca2+ level much faster than control cells. The enhanced Ca2+ extrusion in cells from Bcl-2 knockout (Bcl-2 KO) mice was not due to increased Na+/Ca2+ exchange activity, because removal of external Na+ did not influence the Ca2+ extrusion rate. Overexpression of Bcl-2 in the pancreatic acinar cell line AR42J decreased Ca2+ extrusion, whereas silencing Bcl-2 expression (siRNA) had the opposite effect. Loss of Bcl-2, while increasing Ca2+ extrusion, dramatically decreased necrosis and promoted apoptosis induced by oxidative stress, whereas specific inhibition of Ca2+ pumps in the plasma membrane (PMCA) with caloxin 3A1 reduced Ca2+ extrusion and increased necrosis. Bcl-2 regulates PMCA function in pancreatic acinar cells and thereby influences cell fate.
Collapse
Affiliation(s)
- Pawel E Ferdek
- Medical Research Council Group, School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK
| | | | | | | | | | | |
Collapse
|
21
|
Li Z, Lu M, Chu J, Qiao X, Meng X, Sun B, Zhang W, Xue D. Early proteome analysis of rat pancreatic acinar AR42J cells treated with taurolithocholic acid 3-sulfate. Pancreatology 2012; 12:248-56. [PMID: 22687381 DOI: 10.1016/j.pan.2012.02.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Revised: 12/29/2011] [Accepted: 02/10/2012] [Indexed: 12/11/2022]
Abstract
BACKGROUND Bile acids are the initiating factors of biliary acute pancreatitis. Bile acids can induce the activation of intracellular zymogen, thus leading injury in pancreatic acinar cells. Pathological zymogen activation in pancreatic acinar cells is a common feature of all types of acute pancreatitis. The proteins expressed in pancreatic acinar cells during the activation of zymogen may determine the severity of acute pancreatitis. The present study aims to determine the differentially expressed proteins in taurolithocholic acid 3-sulfate-stimulated pancreatic acinar cells as an in vitro model for acute pancreatitis. METHODS Rat pancreatic acinar AR42J cells were treated with taurolithocholic acid 3-sulfate for 20 min. Laser confocal scanning microscopy and flow cytometry were used to detect activated trypsinogen in pancreatic acinar AR42J cells. After the determination of trypsinogen activation, proteome analysis was performed to identify the proteins differentially expressed in taurolithocholic acid 3-sulfate-treated cells and non-treated cells. RESULTS After treatment with taurolithocholic acid 3-sulfate for 20 min, the activation of trypsinogen in AR42J cells was concurrent with changes in the protein expression profile. Thirty-nine differentially expressed proteins were detected; among these, 23 proteins were up-regulated and 16 proteins were down-regulated. KEGG analysis indicated that these proteins are involved in cellular metabolic pathways, cellular defensive mechanisms, intracellular calcium regulation and cytoskeletal changes. CONCLUSION The expression of proteins in the pancreatic acinar cell changes at the early stage of biliary acute pancreatitis. These differentially expressed proteins will provide valuable information to understand the pathophysiologic mechanism biliary acute pancreatitis and may be useful for prognostic indices of acute pancreatitis.
Collapse
Affiliation(s)
- Zhituo Li
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, 23 You Zheng Street, Harbin 150001, China
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Voronina S, Barrow S, Simpson A, Gerasimenko O, da Silva Xavier G, Rutter G, Petersen O, Tepikin AV. Dynamic changes in cytosolic and mitochondrial ATP levels in pancreatic acinar cells. Gastroenterology 2010; 138:1976-87. [PMID: 20102715 PMCID: PMC6101211 DOI: 10.1053/j.gastro.2010.01.037] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2009] [Revised: 12/17/2009] [Accepted: 01/21/2010] [Indexed: 01/09/2023]
Abstract
BACKGROUND & AIMS Previous studies of pancreatic acinar cells characterized the effects of Ca(2+)-releasing secretagogues and substances, inducing acute pancreatitis on mitochondrial Ca(2+), transmembrane potential, and NAD(P)H, but dynamic measurements of the crucial intracellular adenosine triphosphate (ATP) levels have not been reported. Here we characterized the effects of these agents on ATP levels in the cytosol and mitochondria. METHODS ATP levels were monitored using cytosolic- or mitochondrial-targeted luciferases. RESULTS Inhibition of oxidative phosphorylation produced a substantial decrease in cytosolic ATP comparable to that induced by inhibition of glycolysis. Cholecystokinin-8 (CCK) increased cytosolic ATP in spite of accelerating ATP consumption. Acetylcholine, caerulein, and bombesin had similar effect. A bile acid, taurolithocholic acid 3-sulfate (TLC-S); a fatty acid, palmitoleic acid (POA); and palmitoleic acid ethyl ester (POAEE) reduced cytosolic ATP. The ATP decrease in response to these substances was observed in cells with intact or inhibited oxidative phosphorylation. TLC-S, POA, and POAEE reduced mitochondrial ATP, whereas physiological CCK increased mitochondrial ATP. Supramaximal CCK produced a biphasic response composed of a small initial decline followed by a stronger increase. CONCLUSIONS Both glycolysis and oxidative phosphorylation make substantial contributions to ATP production in acinar cells. Ca(2+)-releasing secretagogues increased ATP level in the cytosol and mitochondria of intact isolated cells. TLC-S, POA, and POAEE reduced cytosolic and mitochondrial ATP. When cells rely on nonoxidative ATP production, secretagogues as well as TLC-S, POA, and POAEE all diminish cytosolic ATP levels.
Collapse
Affiliation(s)
- Svetlana Voronina
- The Physiological Laboratory, School of Biomedical Sciences, The University of Liverpool, Crown Street, Liverpool, L69 3BX, UK
| | - Stephanie Barrow
- The Physiological Laboratory, School of Biomedical Sciences, The University of Liverpool, Crown Street, Liverpool, L69 3BX, UK
| | - Alec Simpson
- Department of Human Anatomy and Cell Biology, School of Biomedical Sciences, The University of Liverpool, Crown Street, Liverpool, L69 3BX, UK
| | - Oleg Gerasimenko
- The Physiological Laboratory, School of Biomedical Sciences, The University of Liverpool, Crown Street, Liverpool, L69 3BX, UK
| | - Gabriela da Silva Xavier
- Section of Cell Biology, Division of Medicine, Imperial College, London, Sir Alexander Fleming Building, Exhibition Road, London SW7 2AZ, UK
| | - Guy Rutter
- Section of Cell Biology, Division of Medicine, Imperial College, London, Sir Alexander Fleming Building, Exhibition Road, London SW7 2AZ, UK
| | - Ole Petersen
- The Physiological Laboratory, School of Biomedical Sciences, The University of Liverpool, Crown Street, Liverpool, L69 3BX, UK
| | - Alexei V. Tepikin
- The Physiological Laboratory, School of Biomedical Sciences, The University of Liverpool, Crown Street, Liverpool, L69 3BX, UK
| |
Collapse
|
23
|
|
24
|
Gerbino A, Ranieri M, Lupo S, Caroppo R, Debellis L, Maiellaro I, Caratozzolo MF, Lopez F, Colella M. Ca2+-dependent K+ efflux regulates deoxycholate-induced apoptosis of BHK-21 and Caco-2 cells. Gastroenterology 2009; 137:955-64, 964.e1-2. [PMID: 19328800 DOI: 10.1053/j.gastro.2009.03.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 03/10/2009] [Accepted: 03/18/2009] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS Deoxycholate (DC) has proapoptotic and tumorigenic effects in different cell types of the gastrointestinal tract. Exposure of BHK-21 (stromal) cells to DC induces Ca(2+) entry at the plasma membrane, which affects intracellular Ca(2+) signaling. We assessed whether DC-induced increases in [Ca(2+)] can impinge on plasma membrane properties (eg, ionic conductances) involved in cell apoptosis. METHODS Single- and double-barreled microelectrodes were used to measure membrane potential (V(m)) and extracellular [K(+)] in BHK-21 fibroblasts and Caco-2 colon carcinoma cells. Apoptosis was assessed by Hoechst labeling, propidium iodide staining, and caspase-3 and caspase-7 assays. RESULTS DC-induced cell membrane hyperpolarization was directly measured with intracellular microelectrodes in both cell lines. Diverse Ca(2+) mobilizing agents, such as membrane receptor agonists, an inhibitor of the sarco/endoplasmic reticulum Ca(2+) adenosine triphosphatase and a Ca(2+) ionophore, also induced increases in V(m). Removal of extracellular Ca(2+) reduced the agonist- and DC-induced membrane hyperpolarization by approximately 15% and 60%, respectively. These findings indicate a prominent role for Ca(2+) entry at the plasma membrane in the action of this bile salt. Blockade of Ca(2+)-activated K(+) conductances by charybdotoxin and apamin reduced DC-induced hyperpolarization by 75% and 64% in BHK-21 and Caco-2 cells, respectively. These inhibitors also reduced the DC-induced increase in extracellular [K(+)] by 75% and cell apoptosis by approximately 50% in both cell lines. CONCLUSIONS Ca(2+)-dependent K(+) conductance is an important regulator of DC-induced apoptosis in stromal and colon cancer cells.
Collapse
Affiliation(s)
- Andrea Gerbino
- Department of General and Environmental Physiology, University of Bari, Bari, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Voronina S, Sherwood M, Barrow S, Dolman N, Conant A, Tepikin A. Downstream from calcium signalling: mitochondria, vacuoles and pancreatic acinar cell damage. Acta Physiol (Oxf) 2009; 195:161-9. [PMID: 18983443 DOI: 10.1111/j.1748-1716.2008.01931.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ca(2+) is one of the most ancient and ubiquitous second messengers. Highly polarized pancreatic acinar cells serve as an important cellular model for studies of Ca(2+) signalling and homeostasis. Downstream effects of Ca(2+) signalling have been and continue to be an important research avenue. The primary functions regulated by Ca(2+) in pancreatic acinar cells--exocytotic secretion and fluid secretion--have been defined and extensively characterized in the second part of the last century. The role of cytosolic Ca(2+) in cellular pathology and the related question of the interplay between Ca(2+) signalling and bioenergetics are important current research lines in our and other laboratories. Recent findings in these interwoven research areas are discussed in the current review.
Collapse
Affiliation(s)
- S Voronina
- Physiological Laboratory, University of Liverpool, Liverpool, UK
| | | | | | | | | | | |
Collapse
|
26
|
Lao-Sirieix P, Corovic A, Jankowski J, Lowe A, Triadafilopoulos G, Fitzgerald RC. Physiological and molecular analysis of acid loading mechanisms in squamous and columnar-lined esophagus. Dis Esophagus 2008; 21:529-38. [PMID: 18840137 DOI: 10.1111/j.1442-2050.2007.00807.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Barrett's esophagus (BE) may be an adaptive cellular response to repeated acid exposure. The aims of this study were to compare intracellular acid loading in BE cells with normal squamous esophageal cells. Primary squamous and BE cells were obtained endoscopically and cultured for up to 24 h. Barrett's adenocarcinoma cell lines TE7 and OE-33 were compared with a normal esophageal (NE) cell line OE-21. Extracellular pH was lowered to 6.0 using HCl; specific ion exchangers were blocked pharmacologically and pH microfluorimetry was performed using 2'7'-bis(carboxyethyl)-5(6)-carboxyfluorescein. The effect of prolonged acid preincubations and repeated acid exposure on acid loading and recovery were examined. Acid loading was greater in primary BE than NE cells (DeltapHi -0.22 +/- 0.08 vs.-0.13 +/- 0.01) and maximal in the BE carcinoma cell line TE7 (DeltapHi -0.30 +/- 0.01). Whereas TE7 cells were able to recover fully from repeated acid exposure, OE-21 cells remained profoundly acidic. BE primary and transformed cells utilize DIDS inhibitable sodium-independent chloride/bicarbonate exchange as well as sodium/hydrogen ion exchange for acid loading. In contrast, SE only requires sodium-independent chloride/bicarbonate exchange for acidification. The degree of acid loading is greater in BE than NE cells and it occurs via dual ion exchangers similar to gastric mucosa. Only Barrett's epithelial cells can maintain a physiological pHi following prolonged and repeated reflux exposure, which may confer a teleological advantage.
Collapse
Affiliation(s)
- P Lao-Sirieix
- Cancer Cell Unit, Hutchison, MRC Research Center, Cambridge, UK
| | | | | | | | | | | |
Collapse
|
27
|
Nguyen A, Bouscarel B. Bile acids and signal transduction: role in glucose homeostasis. Cell Signal 2008; 20:2180-97. [PMID: 18634871 DOI: 10.1016/j.cellsig.2008.06.014] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Accepted: 06/23/2008] [Indexed: 01/06/2023]
Abstract
Bile acids are mainly recognized for their role in dietary lipid absorption and cholesterol homeostasis. However, recent progress in bile acid research suggests that bile acids are important signaling molecules that play a role in glucose homeostasis. Among the various supporting evidence, several reports have demonstrated an improvement of the glycemic index of type 2 diabetic patients treated with diverse bile acid binding resins. Herein, we review the diverse interactions of bile acids with various signaling/response pathways, including calcium mobilization and protein kinase activation, membrane receptor-mediated responses, and nuclear receptor responses. Some of the effects of the bile acids are direct through the activation of specific receptors, i.e., TGR5, CAR, VDR, and FXR, while others imply modulation of the hormonal, growth factor and/or neuromediator responses, i.e., glucagon, EGF, and acetylcholine. We also discuss recent evidence implicating the interaction of bile acids with glucose homeostasis mechanisms, with the integration of our understanding of how the signaling mechanisms modulated by bile acid could regulate glucose metabolism.
Collapse
Affiliation(s)
- Amy Nguyen
- Department of Biochemistry and Molecular Biology, The George Washington University Medical Center, Washington, DC 20037, USA
| | | |
Collapse
|
28
|
Abstract
Cytosolic Ca2+ signals are crucial for the control of fluid and enzyme secretion from exocrine glands. The highly polarized exocrine acinar cells have evolved sophisticated and complex Ca2+ signaling mechanisms that exercise precise control of the secretory events occurring across the apical plasma membrane bordering the gland lumen. Ca2+ stores in the endoplasmic reticulum, the secretory granules, the lysosomes, and the endosomes all play important roles in the generation of the local apical Ca2+ spikes that switch on Cl(-) channels in the apical plasma membrane as well as exocytotic export of enzymes. The mitochondria are crucial not only for ATP generation but also for the physiologically important subcellular compartmentalization of the cytosolic Ca2+ signals.
Collapse
Affiliation(s)
- Ole H Petersen
- MRC Group, The Physiological Laboratory, School of Biomedical Science, University of Liverpool, Liverpool L69 3BX, United Kingdom.
| | | |
Collapse
|
29
|
Barrow SL, Voronina SG, da Silva Xavier G, Chvanov MA, Longbottom RE, Gerasimenko OV, Petersen OH, Rutter GA, Tepikin AV. ATP depletion inhibits Ca2+ release, influx and extrusion in pancreatic acinar cells but not pathological Ca2+ responses induced by bile. Pflugers Arch 2007; 455:1025-39. [PMID: 17952455 DOI: 10.1007/s00424-007-0360-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2007] [Accepted: 09/24/2007] [Indexed: 11/26/2022]
Abstract
Here, we describe novel mechanisms limiting a toxic cytosolic Ca(2+) rise during adenosine 5'-triphosphate (ATP) depletion. We studied the effect of ATP depletion on Ca(2+) signalling in mouse pancreatic acinar cells. Measurements of ATP in isolated cells after adenovirus-mediated expression of firefly luciferase revealed that the cytosolic ATP concentration fell from approximately 1 mM to near zero after treatment with oligomycin plus iodoacetate. ATP depletion resulted in the inhibition of Ca(2+) extrusion, which was accompanied by a remarkably synchronous inhibition of store-operated Ca(2+) influx. Alternative inhibition of Ca(2+) extrusion by carboxyeosin had a much smaller effect on Ca(2+) influx. The coordinated metabolic inhibition of Ca(2+) influx and extrusion suggests the existence of a common ATP-dependent master regulator of both processes. ATP-depletion also suppressed acetylcholine (ACh)-induced Ca(2+) oscillations, which was due to the inhibition of Ca(2+) release from internal stores. This could be particularly important for limiting Ca(2+) toxicity during periods of hypoxia. In contrast, metabolic control of Ca(2+) influx and Ca(2+) release from internal stores spectacularly failed to prevent large toxic Ca(2+) responses induced by bile acids-activators of acute pancreatitis (a frequent and often fatal disease of the exocrine pancreas). The bile acids taurolithocholic acid 3-sulphate (TLC-S), taurochenodeoxycholic acid (TCDC) and taurocholic acid (TC) were used in our experiments. Neither Ca(2+) release from internal stores nor Ca(2+) influx triggered by bile acids were inhibited by ATP depletion, emphasising the danger of these pathological mechanisms.
Collapse
Affiliation(s)
- Stephanie L Barrow
- The Physiological Laboratory, The University of Liverpool, Crown Street, Liverpool L69 3BX, UK
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Waseem TV, Kolos VA, Lapatsina LP, Fedorovich SV. Hypertonic shrinking but not hypotonic swelling increases sodium concentration in rat brain synaptosomes. Brain Res Bull 2007; 73:135-42. [PMID: 17499647 DOI: 10.1016/j.brainresbull.2007.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2007] [Accepted: 03/01/2007] [Indexed: 11/20/2022]
Abstract
Neurotransmitter release is dependent on both calcium and sodium influx. Hypotonic swelling and hypertonic shrinking of neurons evokes calcium-independent exocytosis of neurotransmitters into the synaptic cleft. To date, there are not too much data available on relationship between extracellular osmolarity and sodium concentration in presynaptic endings. In the present study we investigated the effects of hypotonic swelling and hypertonic shrinking on sodium levels, as measured using fluorescent dyes SBFI-AM and Sodium Green in rat brain synaptosomes. Reduction of incubation medium osmolarity from 310 to 230 mOsm did not raise the intrasynaptosomal sodium concentration. An increase of osmolarity from 310 to 810 mOsm is accompanied by a dose-dependent elevation of sodium concentration from 8.1+/-0.5 to 46.5+/-2.8mM, respectively. This effect was insensitive to several channel inhibitors such as: tetrodotoxin, an inhibitor of voltage-gated sodium channels, bumetanide, an inhibitor of Na(+)/K(+)/2Cl(-) cotransport, gadolinium, an inhibitor of nonselective mechanosensitive channels, ruthenium red, an inhibitor of transient receptor potential channel and amiloride, an inhibitor of epithelial sodium channel/degenerin. Additionally, using the fluorescent dye BCECF-AM, we have shown that hypertonic shrinking caused a dose-dependent acidification of intrasynaptosomal cytosol, which suggests that the Na(+)/H(+) exchanger is not involved in the effect of increased osmolarity on cytosolic sodium levels. The increase in intrasynaptosomal sodium concentrations following increases in osmolarity is probably due to sodium influx through another sodium channels.
Collapse
Affiliation(s)
- Tatyana V Waseem
- Institute of Biophysics and Cell Engineering, Akademicheskaya Street, 27, Minsk 220072, Belarus
| | | | | | | |
Collapse
|
31
|
Fischer L, Gukovskaya AS, Penninger JM, Mareninova OA, Friess H, Gukovsky I, Pandol SJ. Phosphatidylinositol 3-kinase facilitates bile acid-induced Ca(2+) responses in pancreatic acinar cells. Am J Physiol Gastrointest Liver Physiol 2007; 292:G875-86. [PMID: 17158252 DOI: 10.1152/ajpgi.00558.2005] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Bile acids are known to induce Ca(2+) signals in pancreatic acinar cells. We have recently shown that phosphatidylinositol 3-kinase (PI3K) regulates changes in free cytosolic Ca(2+) concentration ([Ca(2+)](i)) elicited by CCK by inhibiting sarco(endo)plasmic reticulum Ca(2+)-ATPase (SERCA). The present study sought to determine whether PI3K regulates bile acid-induced [Ca(2+)](i) responses. In pancreatic acinar cells, pharmacological inhibition of PI3K with LY-294002 or wortmannin inhibited [Ca(2+)](i) responses to taurolithocholic acid 3-sulfate (TLC-S) and taurochenodeoxycholate (TCDC). Furthermore, genetic deletion of the PI3K gamma-isoform also decreased [Ca(2+)](i) responses to bile acids. Depletion of CCK-sensitive intracellular Ca(2+) pools or application of caffeine inhibited bile acid-induced [Ca(2+)](i) signals, indicating that bile acids release Ca(2+) from agonist-sensitive endoplasmic reticulum (ER) stores via an inositol (1,4,5)-trisphosphate-dependent mechanism. PI3K inhibitors increased the amount of Ca(2+) in intracellular stores during the exposure of acinar cells to bile acids, suggesting that PI3K negatively regulates SERCA-dependent Ca(2+) reloading into the ER. Bile acids inhibited Ca(2+) reloading into ER in permeabilized acinar cells. This effect was augmented by phosphatidylinositol (3,4,5)-trisphosphate (PIP(3)), suggesting that both bile acids and PI3K act synergistically to inhibit SERCA. Furthermore, inhibition of PI3K by LY-294002 completely inhibited trypsinogen activation caused by the bile acid TLC-S. Our results indicate that PI3K and its product, PIP(3), facilitate bile acid-induced [Ca(2+)](i) responses in pancreatic acinar cells through inhibition of SERCA-dependent Ca(2+) reloading into the ER and that bile acid-induced trypsinogen activation is mediated by PI3K. The findings have important implications for the mechanism of acute pancreatitis since [Ca(2+)](i) increases and trypsinogen activation mediate key pathological processes in this disorder.
Collapse
Affiliation(s)
- L Fischer
- Veterans Affairs Greater Los Angeles Healthcare System, West Los Angeles Veterans Affairs Healthcare Center, Los Angeles, CA 90073, USA
| | | | | | | | | | | | | |
Collapse
|
32
|
Gerasimenko JV, Flowerdew SE, Voronina SG, Sukhomlin TK, Tepikin AV, Petersen OH, Gerasimenko OV. Bile acids induce Ca2+ release from both the endoplasmic reticulum and acidic intracellular calcium stores through activation of inositol trisphosphate receptors and ryanodine receptors. J Biol Chem 2006; 281:40154-63. [PMID: 17074764 DOI: 10.1074/jbc.m606402200] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Gallstones can cause acute pancreatitis, an often fatal disease in which the pancreas digests itself. This is probably because of biliary reflux into the pancreatic duct and subsequent bile acid action on the acinar cells. Because Ca(2+) toxicity is important for the cellular damage in pancreatitis, we have studied the mechanisms by which the bile acid taurolithocholic acid 3-sulfate (TLC-S) liberates Ca(2+). Using two-photon plasma membrane permeabilization and measurement of [Ca(2+)] inside intracellular stores at the cell base (dominated by ER) and near the apex (dominated by secretory granules), we have characterized the Ca(2+) release pathways. Inhibition of inositol trisphosphate receptors (IP(3)Rs), by caffeine and 2-APB, reduced Ca(2+) release from both the ER and an acidic pool in the granular area. Inhibition of ryanodine receptors (RyRs) by ruthenium red (RR) also reduced TLC-S induced liberation from both stores. Combined inhibition of IP(3)Rs and RyRs abolished Ca(2+) release. RyR activation depends on receptors for nicotinic acid adenine dinucleotide phosphate (NAADP), because inactivation by a high NAADP concentration inhibited release from both stores, whereas a cyclic ADPR-ribose antagonist had no effect. Bile acid-elicited intracellular Ca(2+) liberation from both the ER and the apical acidic stores depends on both RyRs and IP(3)Rs.
Collapse
Affiliation(s)
- Julia V Gerasimenko
- MRC Secretory Control Research Group, The Physiological Laboratory, University of Liverpool, Crown Street, Liverpool, L69 3BX United Kingdom
| | | | | | | | | | | | | |
Collapse
|
33
|
Barrow SL, Sherwood MW, Dolman NJ, Gerasimenko OV, Voronina SG, Tepikin AV. Movement of calcium signals and calcium-binding proteins: firewalls, traps and tunnels. Biochem Soc Trans 2006; 34:381-4. [PMID: 16709167 DOI: 10.1042/bst0340381] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In the board game 'Snakes and Ladders', placed on the image of a pancreatic acinar cell, calcium ions have to move from release sites in the secretory region to the nucleus. There is another important contraflow - from calcium entry channels in the basal part of the cell to ER (endoplasmic reticulum) terminals in the secretory granule region. Both transport routes are perilous as the messenger can disappear in any place on the game board. It can be grabbed by calcium ATPases of the ER (masquerading as a snake but functioning like a ladder) and tunnelled through its low buffering environment, it can be lured into the whirlpools of mitochondria uniporters and forced to regulate the tricarboxylic acid cycle, and it can be permanently placed inside the matrix of secretory granules and released only outside the cell. The organelles could trade calcium (e.g. from the ER to mitochondria and vice versa) almost depriving this ion the light of the cytosol and noble company of cytosolic calcium buffers. Altogether it is a rich and colourful story.
Collapse
Affiliation(s)
- S L Barrow
- MRC Secretory Control Research Group, The Physiological Laboratory, The University of Liverpool, UK
| | | | | | | | | | | |
Collapse
|
34
|
Gomez-Pinilla PJ, Morales S, Camello-Almaraz C, Moreno R, Pozo MJ, Camello PJ. Changes in guinea pig gallbladder smooth muscle Ca2+ homeostasis by acute acalculous cholecystitis. Am J Physiol Gastrointest Liver Physiol 2006; 290:G14-22. [PMID: 16109842 DOI: 10.1152/ajpgi.00284.2005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Impaired smooth muscle contractility is a hallmark of acute acalculous cholecystitis. Although free cytosolic Ca2+ ([Ca2+]i) is a critical step in smooth muscle contraction, possible alterations in Ca2+ homeostasis by cholecystitis have not been elucidated. Our aim was to elucidate changes in the Ca2+ signaling pathways induced by this gallbladder dysfunction. [Ca2+]i was determined by epifluorescence microscopy in fura 2-loaded isolated gallbladder smooth muscle cells, and isometric tension was recorded from gallbladder muscle strips. F-actin content was quantified by confocal microscopy. Ca2+ responses to the inositol trisphosphate (InsP3) mobilizing agonist CCK and to caffeine, an activator of the ryanodine receptors, were impaired in cholecystitic cells. This impairment was not the result of a decrease in the size of the releasable pool. Inflammation also inhibited Ca2+ influx through L-type Ca2+ channels and capacitative Ca2+ entry induced by depletion of intracellular Ca2+ pools. In addition, the pharmacological phenotype of these channels was altered in cholecystitic cells. Inflammation impaired contractility further than Ca2+ signal attenuation, which could be related to the decrease in F-actin that was detected in cholecystitic smooth muscle cells. These findings indicate that cholecystitis decreases both Ca2+ release and Ca2+ influx in gallbladder smooth muscle, but a loss in the sensitivity of the contractile machinery to Ca2+ may also be responsible for the impairment in gallbladder contractility.
Collapse
|
35
|
Abstract
PURPOSE OF REVIEW This review presents advances in our understanding of the pathobiologic responses that mediate acute pancreatitis with an emphasis on the interrelationship between the events occurring in the pancreatic acinar cell and the vascular, neural, and immune systems; information on recent reports describing clinical diagnostic and therapeutic aspects of autoimmune pancreatitis; and information on feeding strategies during acute pancreatitis. RECENT FINDINGS The reports during the past year provide important and clinically relevant findings about roles of intracellular events as well as vascular and neural regulatory pathways involved in the mechanism of pancreatitis. Reports during the past year also add to our rapidly growing portfolio describing the characteristics, course, and therapeutic responses in autoimmune pancreatitis. Finally, a provocative report demonstrates that a low-fat elemental-like diet administered by nasogastric tube during severe pancreatitis does not worsen outcome compared with administration of the diet by nasojejunal tube. This report provides rationale for early feeding in these patients by a simpler route than previously recommended and also raises the question about the types of nutrients that should be used in this situation that have the least effect on neurohumoral stimulation of the pancreas. SUMMARY Our understanding of the mechanistic processes that mediate the pathobiologic responses of pancreatitis is rapidly evolving. The continuing challenge is to translate these findings into treatment strategies for pancreatitis.
Collapse
Affiliation(s)
- Stephen J Pandol
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California 90073, USA.
| |
Collapse
|