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Ren J, Wang X, Yee C, Gorrell MD, McLennan SV, Twigg SM. Sitagliptin Is More Effective Than Gliclazide in Preventing Pro-Fibrotic and Pro-Inflammatory Changes in a Rodent Model of Diet-Induced Non-Alcoholic Fatty Liver Disease. Molecules 2022; 27:molecules27030727. [PMID: 35163991 PMCID: PMC8838637 DOI: 10.3390/molecules27030727] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/14/2022] [Accepted: 01/18/2022] [Indexed: 02/06/2023]
Abstract
A diet-induced non-alcoholic fatty liver disease (NAFLD) model causing obesity in rodents was used to examine whether sitagliptin and gliclazide therapies have similar protective effects on pathological liver change. Methods: Male mice were fed a high-fat diet (HFD) or standard chow (Chow) ad libitum for 25 weeks and randomly allocated to oral sitagliptin or gliclazide treatment for the final 10 weeks. Fasting blood glucose and circulating insulin were measured. Inflammatory and fibrotic liver markers were assessed by qPCR. The second messenger ERK and autophagy markers were examined by Western immunoblot. F4/80, collagens and CCN2 were assessed by immunohistochemistry (IHC). Results: At termination, HFD mice were obese, hyperinsulinemic and insulin-resistant but non-diabetic. The DPP4 inhibitor sitagliptin prevented intrahepatic induction of pro-fibrotic markers collagen-IV, collagen-VI, CCN2 and TGF-β1 and pro-inflammatory markers TNF-α and IL-1β more effectively than sulfonylurea gliclazide. By IHC, liver collagen-VI and CCN2 induction by HFD were inhibited only by sitagliptin. Sitagliptin had a greater ability than gliclazide to normalise ERK-protein liver dysregulation. Conclusion: These data indicate that sitagliptin, compared with gliclazide, exhibits greater inhibition of pro-fibrotic and pro-inflammatory changes in an HFD-induced NAFLD model. Sitagliptin therapy, even in the absence of diabetes, may have specific benefits in diet-induced NAFLD.
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Affiliation(s)
- Jing Ren
- Greg Brown Diabetes and Endocrinology Research Laboratories, Sydney Medical School (Central), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia; (J.R.); (X.W.); (C.Y.); (S.V.M.)
| | - Xiaoyu Wang
- Greg Brown Diabetes and Endocrinology Research Laboratories, Sydney Medical School (Central), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia; (J.R.); (X.W.); (C.Y.); (S.V.M.)
| | - Christine Yee
- Greg Brown Diabetes and Endocrinology Research Laboratories, Sydney Medical School (Central), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia; (J.R.); (X.W.); (C.Y.); (S.V.M.)
| | - Mark D. Gorrell
- Liver Enzymes in Metabolism and Inflammation Program, Centenary Institute, The University of Sydney, Newtown, NSW 2042, Australia;
- A.W. Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia
| | - Susan V. McLennan
- Greg Brown Diabetes and Endocrinology Research Laboratories, Sydney Medical School (Central), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia; (J.R.); (X.W.); (C.Y.); (S.V.M.)
- Department of Endocrinology, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia
- New South Wales Health Pathology (Eastern), Camperdown, NSW 2050, Australia
| | - Stephen M. Twigg
- Greg Brown Diabetes and Endocrinology Research Laboratories, Sydney Medical School (Central), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia; (J.R.); (X.W.); (C.Y.); (S.V.M.)
- Department of Endocrinology, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia
- Correspondence: ; Tel.: +612-8627-1890; Fax: +612-8627-1604
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Qiu R, Murata S, Oshiro K, Hatada Y, Taniguchi H. Transplantation of fetal liver tissue coated by ultra-purified alginate gel over liver improves hepatic function in the cirrhosis rat model. Sci Rep 2020; 10:8231. [PMID: 32427847 DOI: 10.1038/s41598-020-65069-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/28/2020] [Indexed: 02/06/2023] Open
Abstract
In this study, we used a new coating agent, that is, ultra-purified alginate gel (UPAL), for fetal liver tissue transplantation. This study aims to compare the effect of UPAL with the effect of other coating agents on improving the effect of fetal liver tissue transplantation in a liver cirrhosis rat model. Prior to the transplantation of wild-type ED14 fetal liver tissues, various coating agents were separately applied on the liver surface of rats with cirrhosis. Then, we compared the engraftment area, engraftment rate and liver function level of these rats. As a result, coating the liver surface of a cirrhosis rat with UPAL obtained the best effect in terms of engraftment area and engraftment rate of the transplanted liver tissue and in the recovery of liver function compared with control group. Therefore, UPAL coating may serve as a novel strategy for liver organoid transplantation.
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Casrouge A, Sauer AV, Barreira da Silva R, Tejera-Alhambra M, Sánchez-Ramón S, ICAReB, Cancrini C, Ingersoll MA, Aiuti A, Albert ML. Lymphocytes are a major source of circulating soluble dipeptidyl peptidase 4. Clin Exp Immunol 2018; 194:166-179. [PMID: 30251416 PMCID: PMC6194339 DOI: 10.1111/cei.13163] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/27/2018] [Accepted: 05/14/2018] [Indexed: 12/13/2022] Open
Abstract
Dipeptidyl peptidase 4 (DPP4, CD26) is a serine protease that is expressed constitutively by many haematopoietic and non-haematopoietic tissues. It exists as a membrane-associated protein, as well as in an active, soluble form (herein called sDPP4), present at high concentrations in bodily fluids. Despite the proposed use of sDPP4 as a biomarker for multiple diseases, its cellular sources are not well defined. Here, we report that individuals with congenital lymphocyte immunodeficiency had markedly lower serum concentrations of sDPP4, which were restored upon successful treatment and restoration of lymphocyte haematopoiesis. Using irradiated lymphopenic mice and wild-type to Dpp4-/- reciprocal bone marrow chimeric animals, we found that haematopoietic cells were a major source of circulating sDPP4. Furthermore, activation of human and mouse T lymphocytes resulted in increased sDPP4, providing a mechanistic link between immune system activation and sDPP4 concentration. Finally, we observed that acute viral infection induced a transient increase in sDPP4, which correlated with the expansion of antigen-specific CD8+ T cell responses. Our study demonstrates that sDPP4 concentrations are determined by the frequency and activation state of lymphocyte populations. Insights from these studies will support the use of sDPP4 concentration as a biomarker for inflammatory and infectious diseases.
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Affiliation(s)
- A Casrouge
- Laboratory of Dendritic Cell Biology, Department of Immunology, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
| | - A V Sauer
- San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), San Raffaele Scientific Institute, Milan, Italy
| | - R Barreira da Silva
- Department of Cancer Immunology, Genentech, Inc, South San Francisco, CA, USA
| | - M Tejera-Alhambra
- Servicio de Inmunología. Hospital Clínico San Carlos, Madrid, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - S Sánchez-Ramón
- Servicio de Inmunología. Hospital Clínico San Carlos, Madrid, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - ICAReB
- IcareB Platform of the Center for Translational Science, Institut Pasteur, Paris, France
| | - C Cancrini
- Ospedale Pediatrico, Bambino Gesù, Roma, Italy
- University Department of Pediatrics, Unit of Immune and Infectious Diseases, Childrens' Hospital Bambino Gesù-University of Torvergata Rome, Rome, Italy
| | - M A Ingersoll
- Laboratory of Dendritic Cell Biology, Department of Immunology, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
| | - A Aiuti
- San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), San Raffaele Scientific Institute, Milan, Italy
| | - M L Albert
- Laboratory of Dendritic Cell Biology, Department of Immunology, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Department of Cancer Immunology, Genentech, Inc, South San Francisco, CA, USA
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Qin CJ, Zhao LH, Zhou X, Zhang HL, Wen W, Tang L, Zeng M, Wang MD, Fu GB, Huang S, Huang WJ, Yang Y, Bao ZJ, Zhou WP, Wang HY, Yan HX. Inhibition of dipeptidyl peptidase IV prevents high fat diet-induced liver cancer angiogenesis by downregulating chemokine ligand 2. Cancer Lett 2018; 420:26-37. [PMID: 29409972 DOI: 10.1016/j.canlet.2018.01.064] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 01/20/2018] [Accepted: 01/22/2018] [Indexed: 12/12/2022]
Abstract
Obesity is a major risk factor for hepatocellular carcinoma (HCC) and is typically accompanied by higher levels of serum dipeptidyl peptidase 4 (DPP4). However, the role of DPP4 in obesity-promoted HCC is unclear. Here, we found that consumption of a high-fat diet (HFD) promoted HCC cell proliferation and metastasis and led to poor survival in a carcinogen-induced model of HCC in rats. Notably, genetic ablation of DPP4 or treatment with a DPP4 inhibitor (vildagliptin) prevented HFD-induced HCC. Moreover, HFD-induced DPP4 activity facilitated angiogenesis and cancer cell metastasis in vitro and in vivo, and vildagliptin prevented tumor progression by mediating the pro-angiogenic role of chemokine ligand 2 (CCL2). Loss of DPP4 effectively reversed HFD-induced CCL2 production and angiogenesis, indicating that the DPP4/CCL2/angiogenesis cascade had key roles in HFD-associated HCC progression. Furthermore, concomitant changes in serum DPP4 and CCL2 were observed in 210 patients with HCC, and high serum DPP4 activity was associated with poor clinical prognosis. These results revealed a link between obesity-related high serum DPP4 activity and HCC progression. Inhibition of DPP4 may represent a novel therapeutic intervention for patients with HCC.
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Affiliation(s)
- Chen-Jie Qin
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China; Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital, Fudan University, Shanghai 200040, China
| | - Ling-Hao Zhao
- National Center for Liver Cancer Research, Shanghai 201805, China; The Third Department of Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
| | - Xu Zhou
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Hui-Lu Zhang
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Wen Wen
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Liang Tang
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Min Zeng
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Ming-Da Wang
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Gong-Bo Fu
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Shuai Huang
- Department of Tumor Minimally Invasive Surgery, Reiji Hospital, Shanghai Jiaotong University, Shanghai 200127, China
| | - Wei-Jian Huang
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China
| | - Yuan Yang
- The Third Department of Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
| | - Zhi-Jun Bao
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital, Fudan University, Shanghai 200040, China
| | - Wei-Ping Zhou
- National Center for Liver Cancer Research, Shanghai 201805, China; The Third Department of Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China
| | - Hong-Yang Wang
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China.
| | - He-Xin Yan
- International Cooperation Laboratory on Signal Transduction, Easten Hepatobiliary Surgery Institute, The Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer Research, Shanghai 201805, China.
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Sokar SS, El-Sayad MES, Ghoneim MES, Shebl AM. Combination of Sitagliptin and Silymarin ameliorates liver fibrosis induced by carbon tetrachloride in rats. Biomed Pharmacother 2017; 89:98-107. [DOI: 10.1016/j.biopha.2017.02.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/19/2017] [Accepted: 02/07/2017] [Indexed: 12/30/2022] Open
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Williams KH, Vieira De Ribeiro AJ, Prakoso E, Veillard AS, Shackel NA, Brooks B, Bu Y, Cavanagh E, Raleigh J, McLennan SV, McCaughan GW, Keane FM, Zekry A, Gorrell MD, Twigg SM. Circulating dipeptidyl peptidase-4 activity correlates with measures of hepatocyte apoptosis and fibrosis in non-alcoholic fatty liver disease in type 2 diabetes mellitus and obesity: A dual cohort cross-sectional study. J Diabetes 2015; 7:809-19. [PMID: 25350950 DOI: 10.1111/1753-0407.12237] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 10/14/2014] [Accepted: 10/14/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Intrahepatic expression of dipeptidyl peptidase-4 (DPP4), and circulating DPP4 (cDPP4) levels and its enzymatic activity, are increased in non-alcoholic fatty liver disease (NAFLD) and in type 2 diabetes mellitus and/or obesity. DPP4 has been implicated as a causative factor in NAFLD progression but few studies have examined associations between cDPP4 activity and NAFLD severity in humans. This study aimed to examine the relationship of cDPP4 activity with measures of liver disease severity in NAFLD in subjects with diabetes and/or obesity. METHODS cDPP4 was measured in 106 individuals with type 2 diabetes who had transient elastography (Cohort 1) and 145 individuals with morbid obesity who had liver biopsy (Cohort 2). Both cohorts had caspase-cleaved keratin-18 (ccK18) measured as a marker of apoptosis. RESULTS Natural log increases in cDPP4 activity were associated with increasing quartiles of ccK18 (Cohorts 1 and 2) and with median liver stiffness ≥10.3 kPa (Cohort 1) and significant fibrosis (F ≥ 2) on liver biopsy (Cohort 2). CONCLUSIONS In diabetes and/or obesity, cDPP4 activity is associated with current apoptosis and liver fibrosis. Given the pathogenic mechanisms by which DPP4 may progress NAFLD, measurement of cDPP4 activity may have utility to predict disease progression and DPP4 inhibition may improve liver histology over time.
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Affiliation(s)
- Kathryn H Williams
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre and Bosch Institute, The University of Sydney, Sydney, New South Wales, Australia
- NHMRC Clinical Trials Centre, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Ana Júlia Vieira De Ribeiro
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Centenary Institute, Sydney, New South Wales, Australia
| | - Emilia Prakoso
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
- Centenary Institute, Sydney, New South Wales, Australia
| | - Anne-Sophie Veillard
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- NHMRC Clinical Trials Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Nicholas A Shackel
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
- Centenary Institute, Sydney, New South Wales, Australia
| | - Belinda Brooks
- Sydney Nursing School, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Yangmin Bu
- Inflammation and Infection Research Centre, School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Erika Cavanagh
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Jim Raleigh
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Susan V McLennan
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre and Bosch Institute, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Geoffrey W McCaughan
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
- Centenary Institute, Sydney, New South Wales, Australia
| | - Fiona M Keane
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Centenary Institute, Sydney, New South Wales, Australia
| | - Amany Zekry
- Inflammation and Infection Research Centre, School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
- St George Hospital, Sydney, New South Wales, Australia
| | - Mark D Gorrell
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Centenary Institute, Sydney, New South Wales, Australia
| | - Stephen M Twigg
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre and Bosch Institute, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
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Kaji K, Yoshiji H, Ikenaka Y, Noguchi R, Aihara Y, Douhara A, Moriya K, Kawaratani H, Shirai Y, Yoshii J, Yanase K, Kitade M, Namisaki T, Fukui H. Dipeptidyl peptidase-4 inhibitor attenuates hepatic fibrosis via suppression of activated hepatic stellate cell in rats. J Gastroenterol 2014; 49:481-91. [PMID: 23475323 DOI: 10.1007/s00535-013-0783-4] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 02/19/2013] [Indexed: 02/04/2023]
Abstract
BACKGROUND Dipeptidyl peptidase-4 inhibitor (DPP4-I) is clinically used as a new oral antidiabetic agent. Although DPP4 is reportedly associated with the progression of chronic liver diseases, the effect of DPP4-I on liver fibrosis development is still obscure. This study was designed to elucidate the effect of DPP4-I on liver fibrosis development in conjunction with the activated hepatic stellate cells (Ac-HSCs). METHODS The antifibrotic effect of DPP4-I was assessed in vivo and in vitro using porcine serum-induced experimental liver fibrosis model. DPP4-I, sitagliptin, at a clinically comparable low dose was administered by gavage daily. RESULTS DPP4-I significantly attenuated liver fibrosis development along with the suppression of hepatic transforming growth factor (TGF)-β1, total collagen, and tissue inhibitor of metalloproteinases-1 in a dose-dependent manner. These suppressive effects occurred almost concurrently with the attenuation of HSCs activation. Our in vitro studies showed that DPP4-I inhibited platelet-derived growth factor-BB-mediated proliferation of the Ac-HSCs as well as upregulation of TGF-β1 and α1(I)-procollagen at magnitudes similar to those of the in vivo studies. The inhibitory effects of DPP4-I against HSCs proliferation and fibrogenic gene expression are mediated through the inhibition of the phosphorylation of ERK1/2, p38 and Smad2/3, respectively. CONCLUSIONS DPP4-I markedly inhibits liver fibrosis development in rats via suppression of HSCs proliferation and collagen synthesis. These suppressive effects are associated with dephosphorylation of ERK1/2, p38 and Smad2/3 in the HSCs. Since DPP4-I is widely used in clinical practice, this drug may represent a potential new therapeutic strategy against liver fibrosis in the near future.
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Affiliation(s)
- Kosuke Kaji
- Third Department of Internal Medicine, Nara Medical University, 840 Shijo-cho, Kashihara, Nara, 634-8522, Japan
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Firneisz G, Somogyi A. Serum level of soluble CD26/dieptidyl peptidase-4 (DPP-4) activity correlates with other liver disease biomarkers both in Asian and European patients. Transl Res 2012; 160:95-6. [PMID: 22683411 DOI: 10.1016/j.trsl.2012.01.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Accepted: 01/17/2012] [Indexed: 01/16/2023]
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Abstract
Non-alcoholic fatty liver disease (NAFLD) is an umbrella term for a series of hepatic pathologies that begin with relatively benign steatosis and can, with appropriate triggers, lead to the serious entity of non-alcoholic steatohepatitis (NASH). This sets the stage for liver fibrosis and finally the development of cirrhosis in up to 20% of patients with NASH. NAFLD, already among the most common diseases in industrialized countries, is increasing in prevalence and roughly affects 30% of US adults and 10% of US children alone. NAFLD is strongly associated with insulin resistance (IR) and represents the hepatic manifestation of the metabolic syndrome. Indeed, treatments aimed at reducing IR are the current mainstay of therapeutic approaches to NAFLD. While lifestyle interventions may produce limited degrees of success, there remains an urgent need for improved pharmacological therapies. Emerging diagnostic and therapeutic opportunities as well as future developments in NAFLD, NASH and liver fibrosis were discussed by a panel of experts and are presented herein. Promising novel therapeutic targets include inhibitors of dipeptidyl peptidase 4 and the renin-angiotensin system. However, improved non-invasive technologies to diagnose and stage NAFLD are needed. Combined with a better understanding of the pathophysiological processes that underlie the mechanisms of hepatic fibrogenesis in NASH, rapid clinical validation of novel therapies is expected.
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Affiliation(s)
- Detlef Schuppan
- Beth Israel Deaconess Medical Center, Division of Gastroenterology, Harvard Medical School, Boston, MA 02215, USA.
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Retlich S, Withopf B, Greischel A, Staab A, Jaehde U, Fuchs H. Binding to dipeptidyl peptidase-4 determines the disposition of linagliptin (BI 1356) - investigations in DPP-4 deficient and wildtype rats. Biopharm Drug Dispos 2009; 30:422-36. [DOI: 10.1002/bdd.676] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Beesley CE, Young EP, Finnegan N, Jackson M, Mills K, Vellodi A, Cleary M, Winchester BG. Discovery of a new biomarker for the mucopolysaccharidoses (MPS), dipeptidyl peptidase IV (DPP-IV; CD26), by SELDI-TOF mass spectrometry. Mol Genet Metab 2009; 96:218-24. [PMID: 19153055 DOI: 10.1016/j.ymgme.2008.12.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Accepted: 12/02/2008] [Indexed: 10/21/2022]
Abstract
Surface enhanced laser desorption/ionisation time of flight (SELDI-TOF) mass spectrometry has been used to search for new protein biomarkers in the plasma of patients with mucopolysacharidoses (MPS). Differences in the levels of some plasma proteins, particularly the apolipoprotein ApoCI, were observed between MPS patients and normal controls, using the different chromatographic surfaces (ProteinChips). ApoCI was identified by both its mass and by immunological techniques. In plasma, it exists in two forms, ApoCI and a truncated form which lacks two N-terminal amino acids, ApoCI'. In controls, the ratio of ApoCI':ApoCI observed using the cation-exchange surface (CM10) was approximately 1:2 whereas in most MPS patients it varied from 1:1 to 1:0.8. The ratio of ApoCI':ApoCI in plasma is determined by the activity of dipeptidyl peptidase IV, DPP-IV (also known as the leucocyte antigen CD26), which was found to be elevated up to 3-fold in MPS patients. The DPP-IV activity decreased in MPS I patients undergoing enzyme replacement therapy, indicating that it could be a useful biomarker for monitoring the efficacy of treatment in MPS disease. As DPP-IV has an important regulatory role in metabolism, it is possible that its elevation could cause some of the secondary pathology in MPS, and inhibition of DPP-IV might have a role in MPS therapy.
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Affiliation(s)
- Clare E Beesley
- Biochemistry Research Group, UCL Institute of Child Health, Guilford Street, London, United Kingdom.
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Andrieu T, Thibault V, Malet I, Laporte J, Bauvois B, Agut H, Cahour A. Similar increased serum dipeptidyl peptidase IV activity in chronic hepatitis C and other viral infections. J Clin Virol 2003; 27:59-68. [PMID: 12727530 DOI: 10.1016/s1386-6532(02)00128-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Dipeptidyl peptidase IV is a transmembrane enzyme widely expressed in many cell types, but also present as a soluble form in biological fluids. Its abnormal activity is sometimes associated with liver disease related pathologies. OBJECTIVES The aim of this study was to evaluate the clinical relevance of changes in serum DPPIV activity in hepatitis C and other viral infections. STUDY DESIGN DPPIV activity was assessed by using a microplate-based colorimetric assay on serum from 88 subjects: 12 healthy uninfected controls, 10 patients with primary biliary cirrhosis (PBC) as a reference group, 36 HCV-infected patients, and patients suffering from viral infections of different etiologies. Levels of DPPIV activity were compared with: (1) those of other serum biochemical parameters such as alanine aminotransferase (ALT), aspartate aminotransferase (AST) and gamma glutamyl transpeptidase (GGT), and bilirubin concentrations; and (2) criteria representative of liver histological status. RESULTS Compared with healthy subjects, DPPIV activity was significantly increased during viral infections and in PBC (P<0.01). In HCV-infected patients, the median activity (interquartile range, IQR), 29.78 IU/l (24.66-35.95), differed significantly (P<0.05) from that of controls: 21.42 (19.76-24.93). No correlation was observed between DPPIV activity and either ALT, AST, bilirubin, or the stage of liver fibrosis and necroinflammatory activity, although GGT was moderately correlated (r=0.58, P<0.05). CONCLUSIONS Although we confirmed an elevation of serum DPPIV activity in PBC, it seems to be a non-specific phenomenon common to viral infections. The absence of correlation between serum DPPIV and markers of liver disease in HCV-infected patients, suggests that this activity originates not only from the liver, but also from other sources such as peripheral blood cells involved in the control of viral infections.
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Affiliation(s)
- T Andrieu
- Laboratoire de Virologie, CERVI, UPRES EA 2387, Groupe Hospitalier Pitié-Salpêtrière, 75651 Paris Cedex 13, France
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Abstract
CD26/DPPIV can be considered a moonlighting protein because it is a multifunctional protein that exerts its different functions depending on cell type and intra- or extracellular conditions in which it is expressed. In the present review, we summarize all its known functions in relation to physiological and pathophysiological conditions. The protein is a proteolytic enzyme, receptor, costimulatory protein, and is involved in adhesion and apoptosis. The CD26/DPPIV protein plays a major role in immune response. Abnormal expression is found in the case of autoimmune diseases, HIV-related diseases and cancer. Natural substrates for CD26/DPPIV are involved in immunomodulation, psycho/neuronal modulation and physiological processes in general. Therefore, targeting of CD26/ DPPIV and especially its proteolytic activity has many therapeutic potentials. On the other hand, there are homologous proteins with overlapping proteolytic activity, which thus may prevent specific modulation of CD26/DPPIV. In conclusion, CD26/DPPIV is a protein present both in various cellular compartments and extracellularly where it exerts different functions and thus is a true moonlighting protein.
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Affiliation(s)
- Emil Boonacker
- Academic Medical Center, University of Amsterdam, Department of Cell Biology and Histology, Amsterdam, The Netherlands
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Durinx C, Neels H, Van der Auwera JC, Naelaerts K, Scharpe S, De Meester I. Reference values for plasma dipeptidyl-peptidase IV activity and their association with other laboratory parameters. Clin Chem Lab Med 2001; 39:155-9. [PMID: 11341750 DOI: 10.1515/cclm.2001.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In blood, the exopeptidase dipeptidyl-peptidase IV (DPPIV; EC 3.4.14.5) is predominantly present in a soluble form in plasma/serum and as an activation antigen on the membrane of lymphocytes (CD26). It modifies some important biologically active peptides (neuropeptides, chemokines), and a regulatory role for DPPIV/CD26 in immune and endocrine processes has been demonstrated. The aim of this study was to determine reference values for plasma/serum DPPIV activity and to study the association of this activity with a series of biochemical and hematological parameters and baseline characteristics such as age, gender, blood pressure and body mass index. We studied 481 healthy subjects aged between 19 and 61 years. The group consisted of 213 men and 268 women equally divided between the different categories of age. Among the women, 127 were taking hormone therapy (contraception/hormone replacement) and 141 were not. A multiple regression model shows that DPPIV activity decreases significantly with age. The activity in women is slightly lower than in men. We observed an important association with liver, muscle and lipid metabolism-related parameters. In this model, no significant contribution of body mass index, blood pressure or hormone therapy could be stated.
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Affiliation(s)
- C Durinx
- Laboratory of Clinical Biochemistry, University of Antwerp, Wilrijk, Belgium
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