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Zhang XL, Zhang G, Bai ZH. miR-34a attenuates myocardial fibrosis in diabetic cardiomyopathy mice via targeting Pin-1. Cell Biol Int 2021; 45:642-653. [PMID: 33289184 DOI: 10.1002/cbin.11512] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 10/29/2020] [Accepted: 11/28/2020] [Indexed: 01/08/2023]
Abstract
Diabetic cardiomyopathy (DCM) is characterized by myocardial hypertrophy and fibrosis. This study aimed to investigate the effects of microRNA (miR)-34a on myocardial fibrosis in DCM and its potential mechanism of targeting Pin-1 signaling. Vimentin and Pin-1 proteins in mouse cardiac tissues were detected by immunohistochemical staining. Locked nucleic acid in situ hybridization was used to measure miR-34a expression in cardiac tissues. Primary mouse cardiac fibroblasts (CFs) were transfected with a mimics control/miR-34a mimics or Pin-1 plasmid and cultured in high-glucose (HG) Dulbecco's modified Eagle's medium. The miR-34a levels were measured by quantitative polymerase chain reaction. The apoptosis and viability of transfected cells were detected by the terminal deoxynucleotidyl transferase dUTP nick end labeling and Cell Counting Kit-8 assays respectively. A cell migration experiment and dual-luciferase reporter assay were also performed. The body weight and fasting blood glucose of DCM mice were significantly higher than those in the control (CTL) group. In addition, DCM mice had decreased serum insulin levels and impaired cardiac function. The number of CFs in the DCM group was higher than in the CTL group and Pin-1 expression was upregulated. The expression level of miR-34a in the cardiac tissue of mice in the DCM group was obviously downregulated compared with the CTL group. The HG stimulation of CFs for 48 h significantly downregulated the expression level of miR-34a and was associated with increased Type I collagen expression, cell viability, and migration and decreased apoptosis. However, these effects could be reversed by overexpressing miR-34a in HG-induced CFs. Furthermore, we found that Pin-1 was a direct target of miR-34a. Our results suggest that miR-34a can attenuate myocardial fibrosis in DCM by reducing Type I collagen production, cell viability, and migration and increasing the apoptosis of CFs by targeting Pin-1 signaling.
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Affiliation(s)
- Xiao-Long Zhang
- Department of Anesthesiology, Shanxi Cardiovascular Disease Hospital, Taiyuan, Shanxi, China
| | - Gang Zhang
- Department of Anesthesiology, Shanxi Cardiovascular Disease Hospital, Taiyuan, Shanxi, China
| | - Ze-Hong Bai
- Department of Anesthesiology, Shanxi Cardiovascular Disease Hospital, Taiyuan, Shanxi, China
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Masiero A, Nelly L, Marianne G, Christophe S, Florian L, Ronan C, Claire B, Cornelia Z, Grégoire B, Eric L, Ludovic L, Dominique B, Sylvie A, Marie G, Francis D, Fabienne S, Cécile C, Isabelle A, Jacques D, Jérôme D, Bruno G, Katarina R, Jean-Michel M, Catherine P. The impact of proline isomerization on antigen binding and the analytical profile of a trispecific anti-HIV antibody. MAbs 2021; 12:1698128. [PMID: 31791173 PMCID: PMC8675452 DOI: 10.1080/19420862.2019.1698128] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Proline cis-trans conformational isomerization is a mechanism that affects different types of protein functions and behaviors. Using analytical characterization, structural analysis, and molecular dynamics simulations, we studied the causes of an aberrant two-peak size-exclusion chromatography profile observed for a trispecific anti-HIV antibody. We found that proline isomerization in the tyrosine-proline-proline (YPP) motif in the heavy chain complementarity-determining region (CDR)3 domain of one of the antibody arms (10e8v4) was a component of this profile. The pH effect on the conformational equilibrium that led to these two populations was presumably caused by a histidine residue (H147) in the light chain that is in direct contact with the YPP motif. Finally, we demonstrated that, due to chemical equilibrium between the cis and trans proline conformers, the antigen-binding potency of the trispecific anti-HIV antibody was not significantly affected in spite of a potential structural clash of 10e8v4 YPtransPtrans conformers with the membrane-proximal ectodomain region epitope in the GP41 antigen. Altogether, these results reveal at mechanistic and molecular levels the effect of proline isomerization in the CDR on the antibody binding and analytical profiles, and support further development of the trispecific anti-HIV antibody.
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Affiliation(s)
| | - Lechat Nelly
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
| | | | | | | | - Crépin Ronan
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
| | - Borel Claire
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
| | | | - Bisch Grégoire
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
| | - Leclerc Eric
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
| | | | | | | | | | | | | | | | | | - Dumas Jacques
- Biologics Research, SANOFI R&D, Vitry-sur-Seine, France
| | - Dabin Jérôme
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
| | - Genet Bruno
- Biologics Development, SANOFI R&D, Vitry-sur-Seine, France
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Bojarska J, Remko M, Breza M, Madura I, Fruziński A, Wolf WM. A Proline-Based Tectons and Supramolecular Synthons for Drug Design 2.0: A Case Study of ACEI. Pharmaceuticals (Basel) 2020; 13:E338. [PMID: 33114370 PMCID: PMC7692516 DOI: 10.3390/ph13110338] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 11/16/2022] Open
Abstract
Proline is a unique, endogenous amino acid, prevalent in proteins and essential for living organisms. It is appreciated as a tecton for the rational design of new bio-active substances. Herein, we present a short overview of the subject. We analyzed 2366 proline-derived structures deposited in the Cambridge Structure Database, with emphasis on the angiotensin-converting enzyme inhibitors. The latter are the first-line antihypertensive and cardiological drugs. Their side effects prompt a search for improved pharmaceuticals. Characterization of tectons (molecular building blocks) and the resulting supramolecular synthons (patterns of intermolecular interactions) involving proline derivatives, as presented in this study, may be useful for in silico molecular docking and macromolecular modeling studies. The DFT, Hirshfeld surface and energy framework methods gave considerable insight into the nature of close inter-contacts and supramolecular topology. Substituents of proline entity are important for the formation and cooperation of synthons. Tectonic subunits contain proline moieties characterized by diverse ionization states: -N and -COOH(-COO-), -N+ and -COOH(-COO-), -NH and -COOH(-COO-), -NH+ and -COOH(-COO-), and -NH2+ and -COOH(-COO-). Furthermore, pharmacological profiles of ACE inhibitors and their impurities were determined via an in silico approach. The above data were used to develop comprehensive classification, which may be useful in further drug design studies.
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Affiliation(s)
- Joanna Bojarska
- Faculty of Chemistry, Institute of General and Ecological Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland; (A.F.); (W.M.W.)
| | - Milan Remko
- Remedika, Luzna 9, 85104 Bratislava, Slovakia;
| | - Martin Breza
- Department of Physical Chemistry, Slovak Technical University, Radlinskeho 9, SK-81237 Bratislava, Slovakia;
| | - Izabela Madura
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland;
| | - Andrzej Fruziński
- Faculty of Chemistry, Institute of General and Ecological Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland; (A.F.); (W.M.W.)
| | - Wojciech M. Wolf
- Faculty of Chemistry, Institute of General and Ecological Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland; (A.F.); (W.M.W.)
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Yang H, Zhang P, Li J, Gao Y, Zhao L, Li J, Guo M, Zhang J, Li H, Wang F, Yuan Y. Targeting PIN-1 Attenuates GCB DLBCL Cell Proliferation Through Inhibition of PI3K/AKT Signaling. Onco Targets Ther 2020; 13:8593-8600. [PMID: 32904547 PMCID: PMC7457679 DOI: 10.2147/ott.s247429] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 07/26/2020] [Indexed: 11/23/2022] Open
Abstract
Introduction Diffuse large B cell lymphoma (DLBCL) is a highly heterogeneous type of non-Hodgkin lymphoma with many molecular subtypes that can be distinguished by gene expression profiling (GEP). However, the pathogenesis of DLBCL is still unclear. Materials and Methods The expression levels of the prolyl isomerase PIN-1 and other related proteins were determined in 73 primary DLBCL patient samples and cell lines by Western blotting (WB) and immunohistochemical (IHC) staining. Cell cycle and apoptosis were evaluated by flow cytometry. Lymphoma cell viability was detected by CCK-8 proliferation assay. Results High levels of PIN-1 expression were detected in 55% of germinal center B cell (GCB) DLBCL patient samples, whereas such abnormal expression levels were found in only 11% of non-GCB DLBCL patient samples. PIN-1 expression was positively associated with activation of the oncogenic phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT) pathway in both GCB DLBCL cell lines and primary patient samples. Depletion of PIN-1 was cytotoxic to GCB DLBCL model cell lines because it led to inhibition of the PI3K/AKT signaling pathway, revealing a GCB DLBCL subgroup that is dependent on this pathway. A PI3K inhibitor was selectively toxic to GCB DLBCL lines expressing high levels of PIN-1. Conclusion Our study used PIN-1 to identify a new subgroup of GCB DLBCL associated with the PI3K/AKT signaling pathway, and our findings reveal that inhibition of PI3K is a promising therapeutic approach for GCB DLBCL.
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Affiliation(s)
- Haijun Yang
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Ping Zhang
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Junkuo Li
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Yang Gao
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100032, People's Republic of China
| | - Luyao Zhao
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100032, People's Republic of China
| | - Jia Li
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Mei Guo
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Jingfang Zhang
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Haimei Li
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Fuqiang Wang
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
| | - Yufen Yuan
- Department of Pathology, Anyang Tumor Hospital, The Fourth Affiliated Hospital of Henan University of Science and Technology, Anyang 455000, People's Republic of China
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