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He M, Feng L, Chen Y, Gao B, Du Y, Zhou L, Li F, Liu H. Polydatin attenuates tubulointerstitial fibrosis in diabetic kidney disease by inhibiting YAP expression and nuclear translocation. Front Physiol 2022; 13:927794. [PMID: 36277194 PMCID: PMC9585250 DOI: 10.3389/fphys.2022.927794] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 09/20/2022] [Indexed: 11/25/2022] Open
Abstract
The activation of Yes-associated protein (YAP) pathway is mutually causal with the increase of extracellular matrix (ECM) stiffness. Polydatin (PD) has been proved to have anti-fibrosis effect in diabetic kidney disease (DKD), but it is still a mystery whether PD participates in YAP-related mechano-transduction. Therefore, this study intends to solve the following two problems: 1) To construct an in vitro system of polyacrylamide hydrogels (PA gels) based on the true stiffness of kidneys in healthy and DKD rats, and observe the effect of PD on pathological matrix stiffness-induced YAP expression in renal fibroblasts; 2) Compared with verteporfin (VP), a pharmacological inhibitor of YAP, to explore whether the therapeutic effect of PD on DKD in vivo model is related to the regulation of YAP. In this study, the in vitro system of PA gels with 3 kPa, 12 kPa and 30 kPa stiffness was constructed and determined for the first time to simulate the kidney stiffness of healthy rats, rats with DKD for 8 weeks and 16 weeks, respectively. Compared with the PA gels with 3 kPa stiffness, the PA gels with 12 kPa and 30 kPa stiffness significantly increased the expression of YAP, α-smooth muscle actin (α-SMA) and collagen I, and the production of reactive oxygen species (ROS) in renal fibroblasts, and the PA gels with 30 kPa stiffness were the highest. PD significantly inhibited the above-mentioned changes of fibroblasts induced by pathological matrix stiffness, suggesting that the inhibition of PD on fibroblast-to-myofibroblast transformation and ECM production was at least partially associated with regulating YAP-related mechano-transduction pathway. Importantly, the inhibitory effect of PD on YAP expression and nuclear translocation in kidneys of DKD rats is similar to that of VP, but PD is superior to VP in reducing urinary protein, blood glucose, blood urea nitrogen and serum creatinine, as well as decreasing the expression of α-SMA and collagen I, ROS overproduction and renal fibrosis. Our results prove for the first time from the biomechanical point of view that PD is a potential therapeutic strategy for delaying the progression of renal fibrosis by inhibiting YAP expression and nuclear translocation.
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Affiliation(s)
- Manlin He
- Department of Nephrology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
| | - Lan Feng
- Department of Nephrology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
| | - Yang Chen
- Department of Nephrology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
| | - Bin Gao
- Department of Endocrinology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
| | - Yiwei Du
- Department of Nephrology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
| | - Lu Zhou
- Department of Nephrology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
| | - Fei Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Hongbao Liu, ; Fei Li,
| | - Hongbao Liu
- Department of Nephrology, Tangdu Hospital, Air Force Military Medical University (Fourth Military Medical University), Xi’an, China
- *Correspondence: Hongbao Liu, ; Fei Li,
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Abdallah M, Nagarajan S, Martin M, Tamer M, Faour WH, Bassil M, Cuisinier FJG, Gergely C, Varga B, Pall O, Miele P, Balme S, El Tahchi M, Bechelany M. Enhancement of Podocyte Attachment on Polyacrylamide Hydrogels with Gelatin-Based Polymers. ACS APPLIED BIO MATERIALS 2020; 3:7531-7539. [PMID: 35019494 DOI: 10.1021/acsabm.0c00734] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Biological activities of cells such as survival and differentiation processes are mainly maintained by a specific extracellular matrix (ECM). Hydrogels have recently been employed successfully in tissue engineering applications. In particular, scaffolds made of gelatin methacrylate-based hydrogels (GelMA) showed great potential due to their biocompatibility, biofunctionality, and low mechanical strength. The development of a hydrogel having tunable and appropriate mechanical properties as well as chemical and biological cues was the aim of this work. A synthetic and biological hybrid hydrogel was developed to mimic the biological and mechanical properties of native ECM. A combination of gelatin methacrylate and acrylamide (GelMA-AAm)-based hydrogels was studied, and it showed tunable mechanical properties upon changing the polymer concentrations. Different GelMA-AAm samples were prepared and studied by varying the concentrations of GelMA and AAm (AAm2.5% + GelMA3%, AAm5% + GelMA3%, and AAm5% + GelMA5%). The swelling behavior, biodegradability, physicochemical and mechanical properties of GelMA-AAm were also characterized. The results showed a variation of swelling capability and a tunable elasticity ranging from 4.03 to 24.98 kPa depending on polymer concentrations. Moreover, the podocyte cell morphology, cytoskeleton reorganization and differentiation were evaluated as a function of GelMA-AAm mechanical properties. We concluded that the AAm2.5% + GelMA3% hydrogel sample having an elasticity of 4.03 kPa can mimic the native kidney glomerular basement membrane (GBM) elasticity and allow podocyte cell attachment without the functionalization of the gel surface with adhesion proteins compared to synthetic hydrogels (PAAm). This work will further enhance the knowledge of the behavior of podocyte cells to understand their biological properties in both healthy and diseased states.
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Affiliation(s)
- Maya Abdallah
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, ENSCM, CNRS, Montpellier 34095, France
| | - Sakthivel Nagarajan
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, ENSCM, CNRS, Montpellier 34095, France
| | - Marta Martin
- Laboratoire Charles Coulomb, Université de Montpellier, CNRS, Montpellier 34095, France
| | - Marleine Tamer
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, ENSCM, CNRS, Montpellier 34095, France
| | - Wissam H Faour
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon
| | - Maria Bassil
- Faculty of Sciences II, Department of Physics, Biomaterials and Intelligent Materials Research Laboratory (LBMI), Lebanese University, Beirut, Lebanon
| | - Frederic J G Cuisinier
- Laboratoire de Bioingénierie et Nanosciences, Université de Montpellier, Montpellier, France
| | - Csilla Gergely
- Laboratoire Charles Coulomb, Université de Montpellier, CNRS, Montpellier 34095, France
| | - Bela Varga
- Laboratoire Charles Coulomb, Université de Montpellier, CNRS, Montpellier 34095, France
| | - Orsolya Pall
- Laboratoire de Bioingénierie et Nanosciences, Université de Montpellier, Montpellier, France
| | - Philippe Miele
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, ENSCM, CNRS, Montpellier 34095, France
| | - Sebastien Balme
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, ENSCM, CNRS, Montpellier 34095, France
| | - Mario El Tahchi
- Faculty of Sciences II, Department of Physics, Biomaterials and Intelligent Materials Research Laboratory (LBMI), Lebanese University, Beirut, Lebanon
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, ENSCM, CNRS, Montpellier 34095, France
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Stangenberg S, Saad S, Schilter HC, Zaky A, Gill A, Pollock CA, Wong MG. Lysyl oxidase-like 2 inhibition ameliorates glomerulosclerosis and albuminuria in diabetic nephropathy. Sci Rep 2018; 8:9423. [PMID: 29930330 PMCID: PMC6013429 DOI: 10.1038/s41598-018-27462-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 05/29/2018] [Indexed: 12/13/2022] Open
Abstract
Diabetic nephropathy is characterised by the excessive amount of extracellular matrix in glomeruli and tubulointerstitial space. Lysyl oxidase-like 2 (LOXL2) is elevated in renal fibrosis and known to play key roles in ECM stabilisation by facilitating collagen cross-links, epithelial to mesenchymal transition and myofibroblast activation. Thus, targeting LOXL2 may prove to be a useful strategy to prevent diabetic nephropathy. We explored the renoprotective effect of a selective small molecule LOXL2 inhibitor (PXS-S2B) in a streptozotocin-induced diabetes model. Diabetic mice were treated with PXS-S2B for 24 weeks and outcomes compared with untreated diabetic mice and with telmisartan treated animals as comparator of current standard of care. Diabetic mice had albuminuria, higher glomerulosclerosis scores, upregulation of fibrosis markers and increased renal cortical LOXL2 expression. Treatment with PXS-S2B reduced albuminuria and ameliorated glomerulosclerosis. This was associated with reduced expression of glomerular fibronectin and tubulointerstitial collagen I. The renoprotective effects of both PXS-S2B and telmisartan were more marked in the glomerular compartment than in the tubulointerstitial space. The study reveals that LOXL2 inhibition was beneficial in preserving glomerular structure and function. Thus, LOXL2 may be a potential therapeutic target in diabetic nephropathy.
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Affiliation(s)
- Stefanie Stangenberg
- Renal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Sydney, Australia.,Sydney Medical School Northern, University of Sydney, NSW, Sydney, Australia
| | - Sonia Saad
- Renal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Sydney, Australia.
| | - Heidi C Schilter
- Pharmaxis Pharmaceutical Ltd., Frenchs Forest, NSW, Sydney, Australia
| | - Amgad Zaky
- Renal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Sydney, Australia
| | - Anthony Gill
- Department of Cancer Research and Pathology Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Sydney, Australia
| | - Carol A Pollock
- Renal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Sydney, Australia.,Sydney Medical School Northern, University of Sydney, NSW, Sydney, Australia
| | - Muh Geot Wong
- Renal Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Sydney, Australia.
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Pradhan R, Ranade D, Sengupta K. Emerin modulates spatial organization of chromosome territories in cells on softer matrices. Nucleic Acids Res 2018; 46:5561-5586. [PMID: 29684168 PMCID: PMC6009696 DOI: 10.1093/nar/gky288] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/04/2018] [Accepted: 04/06/2018] [Indexed: 02/06/2023] Open
Abstract
Cells perceive and relay external mechanical forces into the nucleus through the nuclear envelope. Here we examined the effect of lowering substrate stiffness as a paradigm to address the impact of altered mechanical forces on nuclear structure-function relationships. RNA sequencing of cells on softer matrices revealed significant transcriptional imbalances, predominantly in chromatin associated processes and transcriptional deregulation of human Chromosome 1. Furthermore, 3-Dimensional fluorescence in situ hybridization (3D-FISH) analyses showed a significant mislocalization of Chromosome 1 and 19 Territories (CT) into the nuclear interior, consistent with their transcriptional deregulation. However, CT18 with relatively lower transcriptional dysregulation, also mislocalized into the nuclear interior. Furthermore, nuclear Lamins that regulate chromosome positioning, were mislocalized into the nuclear interior in response to lowered matrix stiffness. Notably, Lamin B2 overexpression retained CT18 near the nuclear periphery in cells on softer matrices. While, cells on softer matrices also activated emerin phosphorylation at a novel Tyr99 residue, the inhibition of which in a phospho-deficient mutant (emerinY99F), selectively retained chromosome 18 and 19 but not chromosome 1 territories at their conserved nuclear locations. Taken together, emerin functions as a key mechanosensor, that modulates the spatial organization of chromosome territories in the interphase nucleus.
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Affiliation(s)
- Roopali Pradhan
- Biology, Main Building, First Floor, Room#B-216, Indian Institute of Science Education and Research (IISER), Pune, Dr Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
| | - Devika Ranade
- Biology, Main Building, First Floor, Room#B-216, Indian Institute of Science Education and Research (IISER), Pune, Dr Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
| | - Kundan Sengupta
- Biology, Main Building, First Floor, Room#B-216, Indian Institute of Science Education and Research (IISER), Pune, Dr Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
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Embry AE, Mohammadi H, Niu X, Liu L, Moe B, Miller-Little WA, Lu CY, Bruggeman LA, McCulloch CA, Janmey PA, Miller RT. Biochemical and Cellular Determinants of Renal Glomerular Elasticity. PLoS One 2016; 11:e0167924. [PMID: 27942003 PMCID: PMC5152842 DOI: 10.1371/journal.pone.0167924] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 11/22/2016] [Indexed: 12/22/2022] Open
Abstract
The elastic properties of renal glomeruli and their capillaries permit them to maintain structural integrity in the presence of variable hemodynamic forces. Measured by micro-indentation, glomeruli have an elastic modulus (E, Young's modulus) of 2.1 kPa, and estimates from glomerular perfusion studies suggest that the E of glomeruli is between 2 and 4 kPa. F-actin depolymerization by latrunculin, inhibition of acto-myosin contractility by blebbistatin, reduction in ATP synthesis, and reduction of the affinity of adhesion proteins by EDTA reduced the glomerular E to 1.26, 1.7, 1.5, and 1.43 kPa, respectively. Actin filament stabilization with jasplakinolide and increasing integrin affinity with Mg2+ increased E to 2.65 and 2.87 kPa, respectively. Alterations in glomerular E are reflected in commensurate changes in F/G actin ratios. Disruption of vimentin intermediate filaments by withaferin A reduced E to 0.92 kPa. The E of decellularized glomeruli was 0.74 kPa, indicating that cellular components of glomeruli have dominant effects on their elasticity. The E of glomerular basement membranes measured by magnetic bead displacement was 2.4 kPa. Podocytes and mesangial cells grown on substrates with E values between 3 and 5 kPa had actin fibers and focal adhesions resembling those of podocytes in vivo. Renal ischemia and ischemia-reperfusion reduced the E of glomeruli to 1.58 kPa. These results show that the E of glomeruli is between 2 and 4 kPa. E of the GBM, 2.4 kPa, is consistent with this value, and is supported by the behavior of podocytes and mesangial cells grown on variable stiffness matrices. The podocyte cytoskeleton contributes the major component to the overall E of glomeruli, and a normal E requires ATP synthesis. The reduction in glomerular E following ischemia and in other diseases indicates that reduced glomerular E is a common feature of many forms of glomerular injury and indicative of an abnormal podocyte cytoskeleton.
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Affiliation(s)
- Addie E. Embry
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
| | - Hamid Mohammadi
- Center for Matrix Biology, University of Toronto, Toronto, Ontario, Canada
| | - Xinying Niu
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
| | - Liping Liu
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
| | - Borren Moe
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
| | - William A. Miller-Little
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
| | - Christopher Y. Lu
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
| | - Leslie A. Bruggeman
- Nephrology, MetroHealth Medical Center, Case-Western Reserve University, Cleveland, Ohio, United States of America
| | | | - Paul A. Janmey
- Physiology and Biophysics, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - R. Tyler Miller
- Nephrology and Medicine, U.T. Southwestern Medical School, Dallas, Texas, United States of America
- Medicine, Dallas VAMC, Dallas, Texas, United States of America
- * E-mail:
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