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Lin YM, Zhang K, Geesala R, Lipson KE, Qiu S, Powell DW, Cohn S, Shi XZ. Mechanical stress-induced connective tissue growth factor plays a critical role in intestinal fibrosis in Crohn's-like colitis. Am J Physiol Gastrointest Liver Physiol 2024; 327:G295-G305. [PMID: 38954823 PMCID: PMC11427090 DOI: 10.1152/ajpgi.00123.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/11/2024] [Accepted: 06/17/2024] [Indexed: 07/04/2024]
Abstract
Crohn's disease (CD) is an inflammatory bowel disease characterized by transmural inflammation and intestinal fibrosis. Mechanisms of fibrosis in CD are not well understood. Transmural inflammation is associated with inflammatory cell infiltration, stenosis, and distention, which present mechanical stress (MS) to the bowel wall. We hypothesize that MS induces gene expression of profibrotic mediators such as connective tissue growth factor (CTGF), which may contribute to fibrosis in CD. A rodent model of CD was induced by intracolonic instillation of TNBS to the distal colon. TNBS instillation induced a localized transmural inflammation (site I), with a distended colon segment (site P) proximal to site I. We detected significant fibrosis and collagen content not only in site I but also in site P in CD rats by day 7. CTGF expression increased significantly in sites P and I, but not in the segment distal to the inflammation site. Increased CTGF expression was detected mainly in the smooth muscle cells (SMCs). When rats were fed exclusively with clear liquid diet to prevent mechanical distention in colitis, expression of CTGF in sites P and I was blocked. Direct stretch led to robust expression of CTGF in colonic SMC. Treatment of CD rats with anti-CTGF antibody FG-3149 reduced fibrosis and collagen content in both sites P and I and exhibited consistent trends toward normalizing expression of collagen mRNAs. In conclusion, our studies suggest that mechanical stress, by upregulating profibrotic mediators, i.e., CTGF, may play a critical role in fibrosis in CD.NEW & NOTEWORTHY We found that CTGF expression increased significantly not only in the inflammation site but in the distended segment proximal to inflammation in a rodent model of CD-like colitis. Release of mechanical distention prevented CTGF expression in CD rats, whereas direct stretch induced CTGF expression. Treatment with anti-CTGF antibody reduced fibrosis and collagen contents in CD rats. Thus, mechanical stress, via upregulating profibrotic mediators, i.e., CTGF, may play a critical role in fibrosis in CD.
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Affiliation(s)
- You-Min Lin
- Department of Internal Medicine, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
| | - Ke Zhang
- Department of Internal Medicine, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
| | - Ramasatyaveni Geesala
- Department of Internal Medicine, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
| | | | - Suimin Qiu
- Department of Pathology, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
| | - Don W Powell
- Department of Internal Medicine, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
| | - Steven Cohn
- Department of Internal Medicine, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
| | - Xuan-Zheng Shi
- Department of Internal Medicine, The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas, United States
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Zhou MS, Zheng SY, Chen C, Li X, Zhang Q, Zhao YJ, Zhang W. Gene expression analysis to identify mechanisms underlying improvement of myocardial fibrosis by finerenone in SHR. Biochem Pharmacol 2024; 220:115975. [PMID: 38086490 DOI: 10.1016/j.bcp.2023.115975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/02/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023]
Abstract
Both spironolactone and finerenone treatments significantly reduced SBP and there was no statistical difference in their antihypertensive effects. The differences in body weight (at the end of 1/2/3/4 week) to pre-dose body weight ratio and heart rate (at the end of 1/2/3/4 week) to pre-dose heart rate ratio were not statistically significant in the vehicle, spironolactone, finerenone, and control groups.There was no statistically significant difference in mortality among the vehicle, spironolactone, and finerenone groups. The relative heart mass, ANP, BNP, CVF, Col I, TGF-β, and Casp-3 were gradually decreased in vehicle group, spironolactone group, and finerenone group. Among them, BNP, CVF, TGF-β, and Casp-3 were significantly decreased in the finerenone group compared with the vehicle group. HE and Masson staining showed that the cardiomyocytes of rats in the vehicle group and spironolactone group were disorganized, with cell hypertrophy, significantly enlarged cell gaps and a large amount of collagen deposition, whereas the cardiomyocytes of rats in the finerenone group and the control group were more neatly arranged, with smaller cell gaps and a small amount of collagen tissue deposition. RNA sequencing (RNA-seq) showed that there was a total of 119 differentially expressed genes (DEGs) between finerenone treatment and vehicle treatment. Kyoto encyclopedia of genes and genomes (KEGG) enrichment analysis showed that the signaling pathways involved were mainly in drug metabolism-cytochrome P450, chemical carcinogenesis, IL-17 signaling pathway, axon guidance, and hematopoietic cell lineage. Protein-protein interaction (PPI) analysis showed that the core genes were Oaslf, Nos2, LOC687780, Rhobtb1, Ephb3, and Rps27a.
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Affiliation(s)
- Ming-Shuang Zhou
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China.
| | - Shao-Ying Zheng
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China
| | - Cheng Chen
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China
| | - Xue Li
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China
| | - Qin Zhang
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China
| | - Ya-Jing Zhao
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China.
| | - Wen Zhang
- Fuwai Yunnan Hospital,Chinese Academy of Medical Sciences, No.528, Shahe North Road, Wuhua District, Kunming City, Yunnan Province, China.
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Kitta T, Chiba H, Kanno-Kakibuchi Y, Hattori T, Higuchi M, Ouchi M, Togo M, Abe-Takahashi Y, Michishita M, Kitano T, Shinohara N. Long-term administration of alpha-1 blocker can reverse the micturition pattern in a bladder outlet obstruction murine model. Int J Urol 2020; 27:1150-1156. [PMID: 32985003 DOI: 10.1111/iju.14377] [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: 06/26/2020] [Accepted: 08/24/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To investigate the effect of chronic administration of an alpha-1 blocker on micturition patterns in long-term partial bladder outlet obstruction. METHODS Mice were divided into three groups: a normal group, in which animals were fed a standard diet; a partial bladder outlet obstruction group, in which the proximal urethra was tied and animals were fed a standard diet; and a partial bladder outlet obstruction + naftopidil group, in which the proximal urethra was tied and animals were fed a standard diet containing naftopidil. Micturition behavior was evaluated in all groups for 6 months after partial bladder outlet obstruction surgery. The parameters evaluated included voided volume, time per void, urination frequency and total urine volume. Quantitative assessment of gene expression was also carried out. RESULTS Total urine volume, as well as total and average voided volume during night, was significantly decreased in partial bladder outlet obstruction + naftopidil mice compared with partial bladder outlet obstruction animals. The levels of transcripts encoding 5-hydroxytryptamine 2A and tissue inhibitor of metalloproteinase 2 were significantly decreased in the partial bladder outlet obstruction + naftopidil group compared with the partial bladder outlet obstruction group. CONCLUSIONS Long-term administration of an alpha-1 blocker seems to reverse the disturbance of the micturition pattern caused by partial bladder outlet obstruction. Mechanistically, this effect might be mediated by changes in the expression of a serotonin receptor and/or in the activity of the fibrogenesis pathway.
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Affiliation(s)
- Takeya Kitta
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Hiroki Chiba
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yukiko Kanno-Kakibuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tsuyoshi Hattori
- Department of Medical Affairs, Asahi Kasei Pharma Corporation, Tokyo, Japan
| | - Madoka Higuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mifuka Ouchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mio Togo
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yui Abe-Takahashi
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mai Michishita
- Laboratory for Pharmacology, Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Tokyo, Japan
| | - Tatsuya Kitano
- Laboratory for Pharmacology, Pharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Tokyo, Japan
| | - Nobuo Shinohara
- Department of Renal and Genitourinary Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
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Kai W, Lin C, Jin Y, Ping-Lin H, Xun L, Bastian A, Arnulf S, Sha-Sha X, Xu L, Shu C. Urethral meatus stricture BOO stimulates bladder smooth muscle cell proliferation and pyroptosis via IL‑1β and the SGK1‑NFAT2 signaling pathway. Mol Med Rep 2020; 22:219-226. [PMID: 32468047 PMCID: PMC7248470 DOI: 10.3892/mmr.2020.11092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 03/25/2020] [Indexed: 11/29/2022] Open
Abstract
Bladder outlet obstruction (BOO), which is primarily caused by benign prostatic hyperplasia, is a common chronic disease. However, previous studies have most commonly investigated BOO using the acute obstruction model. In the present study, a chronic obstruction model was established to investigate the different pathological alterations in the bladder between acute and chronic obstruction. Compared with chronic obstruction, acute obstruction led to increased expression of proliferating cell nuclear antigen and interleukin-1β, which are markers of proliferation and inflammation, respectively. Furthermore, increased fibrosis in the bladder at week 2 was observed. Low pressure promoted mice bladder smooth muscle cell (MBSMC) proliferation, and pressure overload inhibited cell proliferation and increased the proportion of dead MBSMCs. Further investigation using serum/glucocorticoid regulated kinase 1 (SGK1) small interfering RNAs indicated that low pressure may promote MBSMC proliferation by upregulating SGK1 and nuclear factor of activated T-cell expression levels. Therefore, the present study suggested that acute obstruction led to faster decompensation of bladder function and chronic bladder obstruction displayed an enhanced ability to progress to BOO.
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Affiliation(s)
- Wang Kai
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610041, P.R. China
| | - Chen Lin
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610041, P.R. China
| | - Yang Jin
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610041, P.R. China
| | - He Ping-Lin
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610041, P.R. China
| | - Liu Xun
- Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610041, P.R. China
| | - Amend Bastian
- Department of Urology, University of Tübingen, D‑72070 Tübingen, Baden‑Württemberg, Germany
| | - Stenzl Arnulf
- Department of Urology, University of Tübingen, D‑72070 Tübingen, Baden‑Württemberg, Germany
| | - Xing Sha-Sha
- Central Laboratory, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610000, P.R. China
| | - Luo Xu
- Department of Urology, Zunyi Medical University, Guiyang, Guizhou 563000, P.R. China
| | - Cui Shu
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
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5
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Hashemi Gheinani A, Bigger-Allen A, Wacker A, Adam RM. Systems analysis of benign bladder disorders: insights from omics analysis. Am J Physiol Renal Physiol 2020; 318:F901-F910. [PMID: 32116016 DOI: 10.1152/ajprenal.00496.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The signaling pathways and effectors that drive the response of the bladder to nonmalignant insults or injury are incompletely defined. Interrogation of biological systems has been revolutionized by the ability to generate high-content data sets that capture information on a variety of biomolecules in cells and tissues, from DNA to RNA to proteins. In oncology, such an approach has led to the identification of cancer subtypes, improved prognostic capability, and has provided a basis for precision treatment of patients. In contrast, systematic molecular characterization of benign bladder disorders has lagged behind, such that our ability to uncover novel therapeutic interventions or increase our mechanistic understanding of such conditions is limited. Here, we discuss existing literature on the application of omics approaches, including transcriptomics and proteomics, to urinary tract conditions characterized by pathological tissue remodeling. We discuss molecular pathways implicated in remodeling, challenges in the field, and aspirations for omics-based research in the future.
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Affiliation(s)
- Ali Hashemi Gheinani
- Department of Urology, Boston Children's Hospital, Boston, Massachusetts.,Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Alexander Bigger-Allen
- Department of Urology, Boston Children's Hospital, Boston, Massachusetts.,Biological and Biomedical Sciences PhD Program, Harvard Medical School, Boston, Massachusetts
| | - Amanda Wacker
- Department of Urology, Boston Children's Hospital, Boston, Massachusetts.,Florida State University, Tallahassee, Florida
| | - Rosalyn M Adam
- Department of Urology, Boston Children's Hospital, Boston, Massachusetts.,Department of Surgery, Harvard Medical School, Boston, Massachusetts
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6
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Zhou Y, Li H, Liang X, Du H, Suo Y, Chen H, Liu W, Duan R, Huang X, Li Q. The CCN1 (CYR61) protein promotes skin growth by enhancing epithelial-mesenchymal transition during skin expansion. J Cell Mol Med 2019; 24:1460-1473. [PMID: 31828970 PMCID: PMC6991652 DOI: 10.1111/jcmm.14828] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 10/19/2019] [Accepted: 10/24/2019] [Indexed: 12/11/2022] Open
Abstract
The skin expansion technique is widely used to induce skin growth for large-scale skin deformity reconstruction. However, the capacity for skin expansion is limited and searching for ways to improve the expansion efficiency is a challenge. In this study, we aimed to explore the possible mechanism of skin expansion and to find a potential therapeutic target on promoting skin growth. We conducted weighted gene coexpression network analysis (WGCNA) of microarray data generated from rat skin expansion and found CCN1 (CYR61) to be the central hub gene related to epithelial-mesenchymal transition (EMT). CCN1 up-regulation was confirmed in human and rat expanded skin and also in mechanically stretched rat keratinocytes, together with acquired mesenchymal phenotype. After CCN1 stimulation on keratinocytes, cell proliferation was promoted and partial EMT was induced by activating β-catenin pathway. Treatment of CCN1 protein could significantly increase the flap thickness, improve the blood supply and restore the structure in a rat model of skin expansion, whereas inhibition of CCN1 through shRNA interference could dramatically reduce the efficiency of skin expansion. Our findings demonstrate that CCN1 plays a crucial role in skin expansion and that CCN1 may serve as a potential therapeutic target to promote skin growth and improve the efficiency of skin expansion.
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Affiliation(s)
- Yiwen Zhou
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haizhou Li
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao Liang
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hengyu Du
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yingjun Suo
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Chen
- Institute of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
| | - Wenhui Liu
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ran Duan
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaolu Huang
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qingfeng Li
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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CCN1-Yes-Associated Protein Feedback Loop Regulates Physiological and Pathological Angiogenesis. Mol Cell Biol 2019; 39:MCB.00107-19. [PMID: 31262999 DOI: 10.1128/mcb.00107-19] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 06/23/2019] [Indexed: 01/08/2023] Open
Abstract
Cellular communication network factor 1 (CCN1) is a dynamically expressed, matricellular protein required for vascular development and tissue repair. The CCN1 gene is a presumed target of Yes-associated protein (YAP), a transcriptional coactivator that regulates cell growth and organ size. Herein, we demonstrate that the CCN1 promoter is indeed a direct genomic target of YAP in endothelial cells (ECs) of new blood vessel sprouts and that YAP deficiency in mice downregulates CCN1 and alters cytoskeletal and mitogenic gene expression. Interestingly, CCN1 overexpression in cultured ECs inactivates YAP in a negative feedback and causes its nuclear exclusion. Accordingly, EC-specific deletion of the CCN1 gene in mice mimics a YAP gain-of-function phenotype, characterized by EC hyperproliferation and blood vessel enlargement. CCN1 brings about its effect by providing cells with a soft compliant matrix that creates YAP-repressive cytoskeletal states. Concordantly, pharmacological inhibition of cell stiffness recapitulates the CCN1 deletion vascular phenotype. Furthermore, adeno-associated virus-mediated expression of CCN1 reversed the pathology of YAP hyperactivation and the subsequent aberrant growth of blood vessels in mice with ischemic retinopathy. Our studies unravel a new paradigm of functional interaction between CCN1 and YAP and underscore the significance of their interplay in the pathogenesis of neovascular diseases.
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Gaspar D, Peixoto R, De Pieri A, Striegl B, Zeugolis DI, Raghunath M. Local pharmacological induction of angiogenesis: Drugs for cells and cells as drugs. Adv Drug Deliv Rev 2019; 146:126-154. [PMID: 31226398 DOI: 10.1016/j.addr.2019.06.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 05/12/2019] [Accepted: 06/16/2019] [Indexed: 12/12/2022]
Abstract
The past decades have seen significant advances in pro-angiogenic strategies based on delivery of molecules and cells for conditions such as coronary artery disease, critical limb ischemia and stroke. Currently, three major strategies are evolving. Firstly, various pharmacological agents (growth factors, interleukins, small molecules, DNA/RNA) are locally applied at the ischemic region. Secondly, preparations of living cells with considerable bandwidth of tissue origin, differentiation state and preconditioning are delivered locally, rarely systemically. Thirdly, based on the notion, that cellular effects can be attributed mostly to factors secreted in situ, the cellular secretome (conditioned media, exosomes) has come into the spotlight. We review these three strategies to achieve (neo)angiogenesis in ischemic tissue with focus on the angiogenic mechanisms they tackle, such as transcription cascades, specific signalling steps and cellular gases. We also include cancer-therapy relevant lymphangiogenesis, and shall seek to explain why there are often conflicting data between in vitro and in vivo. The lion's share of data encompassing all three approaches comes from experimental animal work and we shall highlight common technical obstacles in the delivery of therapeutic molecules, cells, and secretome. This plethora of preclinical data contrasts with a dearth of clinical studies. A lack of adequate delivery vehicles and standardised assessment of clinical outcomes might play a role here, as well as regulatory, IP, and manufacturing constraints of candidate compounds; in addition, completed clinical trials have yet to reveal a successful and efficacious strategy. As the biology of angiogenesis is understood well enough for clinical purposes, it will be a matter of time to achieve success for well-stratified patients, and most probably with a combination of compounds.
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Affiliation(s)
- Diana Gaspar
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Rita Peixoto
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Andrea De Pieri
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Proxy Biomedical Ltd., Coilleach, Spiddal, Galway, Ireland
| | - Britta Striegl
- Competence Centre Tissue Engineering for Drug Development (TEDD), Centre for Cell Biology & Tissue Engineering, Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Zurich, Switzerland
| | - Dimitrios I Zeugolis
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Michael Raghunath
- Competence Centre Tissue Engineering for Drug Development (TEDD), Centre for Cell Biology & Tissue Engineering, Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Zurich, Switzerland.
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Adedeji TG, Olapade-Olaopa EO. Dietary macronutrient content affects inflammatory and fibrotic factors in normal and obstructed bladders. Life Sci 2018; 210:192-200. [DOI: 10.1016/j.lfs.2018.08.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/23/2018] [Accepted: 08/30/2018] [Indexed: 10/28/2022]
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10
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Fusco F, Creta M, De Nunzio C, Iacovelli V, Mangiapia F, Li Marzi V, Finazzi Agrò E. Progressive bladder remodeling due to bladder outlet obstruction: a systematic review of morphological and molecular evidences in humans. BMC Urol 2018; 18:15. [PMID: 29519236 PMCID: PMC5844070 DOI: 10.1186/s12894-018-0329-4] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 02/28/2018] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Bladder outlet obstruction is a common urological condition. We aimed to summarize available evidences about bladder outlet obstruction-induced molecular and morphological alterations occurring in human bladder. METHODS We performed a literature search up to December 2017 including clinical and preclinical basic research studies on humans. The following search terms were combined: angiogenesis, apoptosis, bladder outlet obstruction, collagen, electron microscopy, extracellular matrix, fibrosis, hypoxia, histology, inflammation, innervation, ischemia, pressure, proliferation, remodeling, suburothelium, smooth muscle cells, stretch, urothelium. RESULTS We identified 36 relevant studies. A three-stages model of bladder wall remodeling can be hypothesized involving an initial hypertrophy phase, a subsequent compensation phase and a later decompensation. Histological and molecular alterations occur in the following compartments: urothelium, suburothelium, detrusor smooth muscle cells, detrusor extracellular matrix, nerves. Cyclic stretch, increased hydrostatic and cyclic hydrodynamic pressure and hypoxia are stimuli capable of modulating multiple signaling pathways involved in this remodeling process. CONCLUSIONS Bladder outlet obstruction leads to progressive bladder tissue remodeling in humans. Multiple signaling pathways are involved.
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Affiliation(s)
- Ferdinando Fusco
- Dipartimento di Neuroscienze e Scienze Riproduttive ed Odontostomatologiche, Università Degli Studi Di Napoli Federico II, Via Pansini, 5, 80131 Naples, Italy
| | - Massimiliano Creta
- Dipartimento di Neuroscienze e Scienze Riproduttive ed Odontostomatologiche, Università Degli Studi Di Napoli Federico II, Via Pansini, 5, 80131 Naples, Italy
| | - Cosimo De Nunzio
- Dipartimento di Urologia, Ospedale Sant’Andrea, Università Degli Studi di Roma “La Sapienza”, Rota, Italy
| | - Valerio Iacovelli
- Dipartimento di Medicina Sperimentale e Chirurgia, Università Degli Studi di Roma “Tor Vergata”, Roma, Italy
| | - Francesco Mangiapia
- Dipartimento di Neuroscienze e Scienze Riproduttive ed Odontostomatologiche, Università Degli Studi Di Napoli Federico II, Via Pansini, 5, 80131 Naples, Italy
| | - Vincenzo Li Marzi
- Dipartimento di Urologia, Ospedale Careggi, Università Degli Studi di Firenze, Firenze, Italy
| | - Enrico Finazzi Agrò
- Dipartimento di Medicina Sperimentale e Chirurgia, Università Degli Studi di Roma “Tor Vergata”, Roma, Italy
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16p11.2 transcription factor MAZ is a dosage-sensitive regulator of genitourinary development. Proc Natl Acad Sci U S A 2018; 115:E1849-E1858. [PMID: 29432158 DOI: 10.1073/pnas.1716092115] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Genitourinary (GU) birth defects are among the most common yet least studied congenital malformations. Congenital anomalies of the kidney and urinary tract (CAKUTs) have high morbidity and mortality rates and account for ∼30% of structural birth defects. Copy number variation (CNV) mapping revealed that 16p11.2 is a hotspot for GU development. The only gene covered collectively by all of the mapped GU-patient CNVs was MYC-associated zinc finger transcription factor (MAZ), and MAZ CNV frequency is enriched in nonsyndromic GU-abnormal patients. Knockdown of MAZ in HEK293 cells results in differential expression of several WNT morphogens required for normal GU development, including Wnt11 and Wnt4. MAZ knockdown also prevents efficient transition into S phase, affects transcription of cell-cycle regulators, and abrogates growth of human embryonic kidney cells. Murine Maz is ubiquitously expressed, and a CRISPR-Cas9 mouse model of Maz deletion results in perinatal lethality with survival rates dependent on Maz copy number. Homozygous loss of Maz results in high penetrance of CAKUTs, and Maz is haploinsufficient for normal bladder development. MAZ, once thought to be a simple housekeeping gene, encodes a dosage-sensitive transcription factor that regulates urogenital development and contributes to both nonsyndromic congenital malformations of the GU tract as well as the 16p11.2 phenotype.
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Deng J, Qian X, Li J, Li Y, Li Y, Luo Y. Evaluation of serum cysteine-rich protein 61 levels in patients with coronary artery disease. Biomark Med 2018; 12:329-339. [PMID: 29345157 DOI: 10.2217/bmm-2017-0390] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
AIM The aim is to evaluate serum cysteine-rich protein 61 (Cyr61) levels in patients with coronary artery disease (CAD). PATIENTS & METHODS Serum Cyr61 levels were measured in 180 patients with CAD and 74 participants without CAD. RESULTS Serum Cyr61 levels were significantly higher in CAD patients. Patients with acute coronary syndrome showed significantly higher Cyr61 than those with stable angina pectoris. Serum Cyr61 levels in complex lesion group were significantly higher. Serum Cyr61 was positively correlated with Gensini score and C-reactive protein. Multivariable logistic regression analyses demonstrated that serum Cyr61 levels were independently correlated with the existence of CAD (p = 0.01). CONCLUSION Our study suggested Cyr61 as a potential biomarker in characterizing CAD and therapeutic target for CAD.
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Affiliation(s)
- Jingang Deng
- Division of Cardiology, Shenzhen Tenth People's Hospital, Shenzhen, Guangdong, China
| | - Xiaoxian Qian
- Division of Cardiology, The Third Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Jianping Li
- Division of Cardiology, Shenzhen Tenth People's Hospital, Shenzhen, Guangdong, China
| | - Yanghua Li
- Division of Cardiology, Shenzhen Tenth People's Hospital, Shenzhen, Guangdong, China
| | - Yang Li
- Division of Cardiology, Shenzhen Tenth People's Hospital, Shenzhen, Guangdong, China
| | - Yijun Luo
- Division of Cardiology, Shenzhen Tenth People's Hospital, Shenzhen, Guangdong, China
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Valdivieso P, Toigo M, Hoppeler H, Flück M. T/T homozygosity of the tenascin-C gene polymorphism rs2104772 negatively influences exercise-induced angiogenesis. PLoS One 2017; 12:e0174864. [PMID: 28384286 PMCID: PMC5383042 DOI: 10.1371/journal.pone.0174864] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 03/16/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Mechanical stress, including blood pressure related factors, up-regulate expression of the pro-angiogenic extracellular matrix protein tenascin-C in skeletal muscle. We hypothesized that increased capillarization of skeletal muscle with the repeated augmentation in perfusion during endurance training is associated with blood vessel-related expression of tenascin-C and would be affected by the single-nucleotide polymorphism (SNP) rs2104772, which characterizes the non-synonymous exchange of thymidine (T)-to-adenosine (A) in the amino acid codon 1677 of tenascin-C. METHODS Sixty-one healthy, untrained, male white participants of Swiss descent performed thirty 30-min bouts of endurance exercise on consecutive weekdays using a cycling ergometer. Genotype and training interactions were called significant at Bonferroni-corrected p-value of 5% (repeated measures ANOVA). RESULTS Endurance training increased capillary-to-fiber-ratio (+11%), capillary density (+7%), and mitochondrial volume density (+30%) in m. vastus lateralis. Tenascin-C protein expression in this muscle was confined to arterioles and venules (80% of cases) and increased after training in A-allele carriers. Prior to training, volume densities of subsarcolemmal and myofibrillar mitochondria in m. vastus lateralis muscle were 49% and 18%, respectively, higher in A/A homozygotes relative to T-nucleotide carriers (A/T and T/T). Training specifically increased capillary-to-fiber ratio in A-nucleotide carriers but not in T/T homozygotes. Genotype specific regulation of angiogenesis was reflected by the expression response of 8 angiogenesis-associated transcripts after exercise, and confirmed by training-induced alterations of the shear stress related factors, vimentin and VEGF A. CONCLUSION Our findings provide evidence for a negative influence of T/T homozygosity in rs2104772 on capillary remodeling with endurance exercise.
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Affiliation(s)
- Paola Valdivieso
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland
| | - Marco Toigo
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland
| | - Hans Hoppeler
- Institute of Anatomy, University of Berne, Berne, Switzerland
| | - Martin Flück
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland
- Institute of Anatomy, University of Berne, Berne, Switzerland
- * E-mail:
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Seefried L, Müller-Deubert S, Krug M, Youssef A, Schütze N, Ignatius A, Jakob F, Ebert R. Dissection of mechanoresponse elements in promoter sites of the mechanoresponsive CYR61 gene. Exp Cell Res 2017; 354:103-111. [PMID: 28322825 DOI: 10.1016/j.yexcr.2017.03.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/13/2017] [Accepted: 03/15/2017] [Indexed: 12/26/2022]
Abstract
Mechanotransduction is important for mesenchymal regeneration and differentiation. Exaggerated high or very low impact yields pathological outcome resulting in fracture or tissue atrophy. Pathological strain in animal models was described but tools to dissect the respective stimuli and downstream pathways are limited. We expand the analytical tools to describe DNA strain response elements in a reporter gene approach. Deletion constructs of the human cysteine-rich protein 61 (CYR61) promoter were cloned into luciferase vectors and stably transfected into human telomerase-immortalised mesenchymal stem cells (hMSC-TERT). Cells were mechanically stimulated with variable frequencies, amplitudes and durations. Promoter activity was determined as well as CYR61 mRNA and protein expression. In silico promoter analysis identified putative transcription factor binding sites, one of which was a cAMP response element, verified by electrophoretic mobility shift assay. We demonstrate for the first time that the activity of promoter regions is inhibited in low, but stimulated in high frequency stimulations. We conclude that by varying conditions of mechanical strain it is possible to characterize stimulatory versus inhibitory strain on cellular levels. Our work may be helpful in future studies to dissect the molecular pathways of physiological versus pathological strain and may have implications for clinical exercise based treatment strategies.
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Affiliation(s)
- Lothar Seefried
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany
| | - Sigrid Müller-Deubert
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany
| | - Melanie Krug
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany
| | - Almoatazbellah Youssef
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany
| | - Norbert Schütze
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany
| | - Anita Ignatius
- Institute of Orthopedic Research and Biomechanics, Center of Musculoskeletal Research, University of Ulm, Helmholtzstrasse 14, 89081 Ulm, Germany
| | - Franz Jakob
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany
| | - Regina Ebert
- Orthopedic Center for Musculoskeletal Research, Orthopedic Department, University of Würzburg, Friedrich-Bergius-Ring 15, 97076 Würzburg, Germany.
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15
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Takeshita N, Hasegawa M, Sasaki K, Seki D, Seiryu M, Miyashita S, Takano I, Oyanagi T, Miyajima Y, Takano-Yamamoto T. In vivo expression and regulation of genes associated with vascularization during early response of sutures to tensile force. J Bone Miner Metab 2017; 35:40-51. [PMID: 26825658 DOI: 10.1007/s00774-016-0737-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 01/04/2016] [Indexed: 12/14/2022]
Abstract
Sutures are fibrous tissues that connect bones in craniofacial skeletal complexes. Cranio- and dentofacial skeletal deformities in infant and adolescent patients can be treated by applying tensile force to sutures to induce sutural bone formation. The early gene expression induced by mechanical stress is essential for bone formation in long bones; however, early gene expression during sutural bone formation induced by tensile force is poorly characterized. In vivo studies are essential to evaluate molecular responses to mechanical stresses in heterogeneous cell populations, such as sutures. In this paper we examined in vivo early gene expression and the underlying regulatory mechanism for this expression in tensile-force-applied cranial sutures, focusing on genes involved in vascularization. Tensile force upregulated expression of vascular factors, such as vascular endothelial growth factor (Vegf) and endothelial cell markers, in sutures within 3 h. The expression of connective tissue growth factor (Ctgf) and Rho-associated coiled-coil containing protein kinase 2 (Rock2) was also upregulated by tensile force. A CTGF-neutralizing antibody and the ROCK inhibitor, Y-27632, abolished tensile-force-induced Vegf expression. Moreover, tensile force activated extracellular signal-related kinase 1/2 (ERK1/2) signaling in sagittal sutures, and the ERK1/2 inhibitor, U0126, partially inhibited tensile-force-induced Ctgf expression. These results indicate that tensile force induces in vivo gene expression associated with vascularization early in tensile-force-induced sutural bone formation. Moreover, the early induction of Vegf gene expression is regulated by CTGF and ROCK2.
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Affiliation(s)
- Nobuo Takeshita
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Masakazu Hasegawa
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Kiyo Sasaki
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Daisuke Seki
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Masahiro Seiryu
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Shunro Miyashita
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Ikuko Takano
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Toshihito Oyanagi
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Yuki Miyajima
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan
| | - Teruko Takano-Yamamoto
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
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Di Y, Zhang Y, Hui L, Yang H, Yang Y, Wang A, Chen X. Cysteine‑rich 61 RNA interference inhibits pathological angiogenesis via the phosphatidylinositol 3‑kinase/Akt‑vascular endothelial growth factor signaling pathway in endothelial cells. Mol Med Rep 2016; 14:4321-4327. [PMID: 27666419 DOI: 10.3892/mmr.2016.5772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 11/18/2015] [Indexed: 11/05/2022] Open
Abstract
Hypoxia is a key factor in the pathogenesis of angiogenesis, and cysteine‑rich 61 (CCN1), an angiogenic factor, is involved in the development of pathological angiogenesis. The aim of the present study was to investigate the mechanism of CCN1 RNA interference (RNAi)‑induced inhibition of hypoxia‑induced pathological angiogenesis in endothelial cells. Human umbilical vein endothelial cells (HUVECs) were cultured under hypoxic conditions in vitro. The effects of inhibiting phosphoinositide 3‑kinase (PI3K)/Akt signaling using LY294002 were investigated in hypoxic HUVECs. The proliferation and apoptosis of HUVECs under hypoxia were assessed using CCN1 RNAi. The CCN1‑PI3K/Akt‑vascular endothelial growth factor (VEGF) pathway was analyzed under hypoxic conditions using reverse transcription‑quantitative polymerase chain reaction and western blotting. CCN1 RNAi inhibited the proliferation and induced the apoptosis of the HUVECs under hypoxia, with hypoxia significantly increasing the mRNA and protein expression levels of CCN1, Akt and VEGF. By contrast, CCN1 RNAi reduced the mRNA and protein expression levels of CCN1, Akt and VEGF in the HUVECs (P<0.05). Furthermore, LY294002 reduced the mRNA and protein expression levels of CCN1 in the hypoxic cells (P<0.05). These data indicated that CCN1 inhibits apoptosis and promotes proliferation in HUVECs. Therefore, CCN1 RNAi may offer a novel therapeutic strategy, which may aid in the treatment of pathological angiogenesis via inhibition of the PI3K/Akt‑VEGF pathway.
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Affiliation(s)
- Yu Di
- Department of Ophthalmology, Shengjing Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Yiou Zhang
- Graduate School, China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Linping Hui
- Laboratory Center, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Hongwei Yang
- Department of Ophthalmology, Shengjing Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Yang Yang
- Department of Ophthalmology, Shengjing Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Aiyuan Wang
- Department of Ophthalmology, Shengjing Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Xiaolong Chen
- Department of Ophthalmology, Shengjing Affiliated Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
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17
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Differential Expression between Human Dermal Papilla Cells from Balding and Non-Balding Scalps Reveals New Candidate Genes for Androgenetic Alopecia. J Invest Dermatol 2016; 136:1559-1567. [PMID: 27060448 DOI: 10.1016/j.jid.2016.03.032] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 03/09/2016] [Accepted: 03/24/2016] [Indexed: 11/23/2022]
Abstract
Androgenetic alopecia (AGA) is a common heritable and androgen-dependent hair loss condition in men. Twelve genetic risk loci are known to date, but it is unclear which genes at these loci are relevant for AGA. Dermal papilla cells (DPCs) located in the hair bulb are the main site of androgen activity in the hair follicle. Widely used monolayer-cultured primary DPCs in hair-related studies often lack dermal papilla characteristics. In contrast, immortalized DPCs have high resemblance to intact dermal papilla. We derived immortalized human DPC lines from balding (BAB) and non-balding (BAN) scalp. Both BAB and BAN retained high proportions of dermal papilla signature gene and versican protein expression. We performed expression analysis of BAB and BAN and annotated AGA risk loci with differentially expressed genes. We found evidence for AR but not EDA2R as the candidate gene at the AGA risk locus on chromosome X. Further, our data suggest TWIST1 (twist family basic helix-loop-helix transcription factor 1) and SSPN (sarcospan) to be the functionally relevant AGA genes at the 7p21.1 and 12p12.1 risk loci, respectively. Down-regulated genes in BAB compared to BAN were highly enriched for vasculature-related genes, suggesting that deficiency of DPC from balding scalps in fostering vascularization around the hair follicle may contribute to the development of AGA.
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18
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Alfano M, Canducci F, Nebuloni M, Clementi M, Montorsi F, Salonia A. The interplay of extracellular matrix and microbiome in urothelial bladder cancer. Nat Rev Urol 2016; 13:77-90. [PMID: 26666363 PMCID: PMC7097604 DOI: 10.1038/nrurol.2015.292] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Many pathological changes in solid tumours are caused by the accumulation of genetic mutations and epigenetic molecular alterations. In addition, tumour progression is profoundly influenced by the environment surrounding the transformed cells. The interplay between tumour cells and their microenvironment has been recognized as one of the key determinants of cancer development and is being extensively investigated. Data suggest that both the extracellular matrix and the microbiota represent microenvironments that contribute to the onset and progression of tumours. Through the introduction of omics technologies and pyrosequencing analyses, a detailed investigation of these two microenvironments is now possible. In urological research, assessment of their dysregulation has become increasingly important to provide diagnostic, prognostic and predictive biomarkers for urothelial bladder cancer. Understanding the roles of the extracellular matrix and microbiota, two key components of the urothelial mucosa, in the sequelae of pathogenic events that occur in the development and progression of urothelial carcinomas will be important to overcome the shortcomings in current bladder cancer treatment strategies.
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Affiliation(s)
- Massimo Alfano
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Via Olgettina 60, 20132 Milan Italy
| | - Filippo Canducci
- Department of Biotechnology and Life Sciences, Università degli Studi dell'Insubria, Via Dunant 3, 21100 Varese Italy
| | - Manuela Nebuloni
- Department of Clinical Sciences, Pathology Unit, L. Sacco Hospital, Università degli Studi di Milano, Via Giovanni Battista Grassi 74, 20157 Milan Italy
| | - Massimo Clementi
- Università Vita-Salute San Raffaele, Via Olgettina 60, 20132 Milan Italy
| | - Francesco Montorsi
- Università Vita-Salute San Raffaele, Via Olgettina 60, 20132 Milan Italy
| | - Andrea Salonia
- Università Vita-Salute San Raffaele, Via Olgettina 60, 20132 Milan Italy
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Krupska I, Bruford EA, Chaqour B. Eyeing the Cyr61/CTGF/NOV (CCN) group of genes in development and diseases: highlights of their structural likenesses and functional dissimilarities. Hum Genomics 2015; 9:24. [PMID: 26395334 PMCID: PMC4579636 DOI: 10.1186/s40246-015-0046-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 09/16/2015] [Indexed: 01/03/2023] Open
Abstract
“CCN” is an acronym referring to the first letter of each of the first three members of this original group of mammalian functionally and phylogenetically distinct extracellular matrix (ECM) proteins [i.e., cysteine-rich 61 (CYR61), connective tissue growth factor (CTGF), and nephroblastoma-overexpressed (NOV)]. Although “CCN” genes are unlikely to have arisen from a common ancestral gene, their encoded proteins share multimodular structures in which most cysteine residues are strictly conserved in their positions within several structural motifs. The CCN genes can be subdivided into members developmentally indispensable for embryonic viability (e.g., CCN1, 2 and 5), each assuming unique tissue-specific functions, and members not essential for embryonic development (e.g., CCN3, 4 and 6), probably due to a balance of functional redundancy and specialization during evolution. The temporo-spatial regulation of the CCN genes and the structural information contained within the sequences of their encoded proteins reflect diversity in their context and tissue-specific functions. Genetic association studies and experimental anomalies, replicated in various animal models, have shown that altered CCN gene structure or expression is associated with “injury” stimuli—whether mechanical (e.g., trauma, shear stress) or chemical (e.g., ischemia, hyperglycemia, hyperlipidemia, inflammation). Consequently, increased organ-specific susceptibility to structural damages ensues. These data underscore the critical functions of CCN proteins in the dynamics of tissue repair and regeneration and in the compensatory responses preceding organ failure. A better understanding of the regulation and mode of action of each CCN member will be useful in developing specific gain- or loss-of-function strategies for therapeutic purposes.
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Affiliation(s)
- Izabela Krupska
- Department of Cell Biology, Downstate Medical Center, Brooklyn, NY, 11203, USA.,Department of Ophthalmology, Downstate Medical Center, Brooklyn, NY, 11203, USA
| | - Elspeth A Bruford
- HUGO Gene Nomenclature Committee, European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SD, UK
| | - Brahim Chaqour
- Department of Cell Biology, Downstate Medical Center, Brooklyn, NY, 11203, USA. .,Department of Ophthalmology, Downstate Medical Center, Brooklyn, NY, 11203, USA. .,State University of New York (SUNY) Eye Institute Downstate Medical Center, 450 Clarkson Avenue, MSC 5, Brooklyn, NY, 11203, USA.
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Chintala H, Krupska I, Yan L, Lau L, Grant M, Chaqour B. The matricellular protein CCN1 controls retinal angiogenesis by targeting VEGF, Src homology 2 domain phosphatase-1 and Notch signaling. Development 2015; 142:2364-74. [PMID: 26002917 DOI: 10.1242/dev.121913] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/14/2015] [Indexed: 12/19/2022]
Abstract
Physiological angiogenesis depends on the highly coordinated actions of multiple angiogenic regulators. CCN1 is a secreted cysteine-rich and integrin-binding matricellular protein required for proper cardiovascular development. However, our understanding of the cellular origins and activities of this molecule is incomplete. Here, we show that CCN1 is predominantly expressed in angiogenic endothelial cells (ECs) at the leading front of actively growing vessels in the mouse retina. Endothelial deletion of CCN1 in mice using a Cre-Lox system is associated with EC hyperplasia, loss of pericyte coverage and formation of dense retinal vascular networks lacking the normal hierarchical arrangement of arterioles, capillaries and venules. CCN1 is a product of an immediate-early gene that is transcriptionally induced in ECs in response to stimulation by vascular endothelial growth factor (VEGF). We found that CCN1 activity is integrated with VEGF receptor 2 (VEGF-R2) activation and downstream signaling pathways required for tubular network formation. CCN1-integrin binding increased the expression of and association between Src homology 2 domain-containing protein tyrosine phosphatase-1 (SHP-1) and VEGF-R2, which leads to rapid dephosphorylation of VEGF-R2 tyrosine, thus preventing EC hyperproliferation. Predictably, CCN1 further brings receptors/signaling molecules into proximity that are otherwise spatially separated. Furthermore, CCN1 induces integrin-dependent Notch activation in cultured ECs, and its targeted gene inactivation in vivo alters Notch-dependent vascular specification and remodeling, suggesting that functional levels of Notch signaling requires CCN1 activity. These data highlight novel functions of CCN1 as a naturally optimized molecule, fine-controlling key processes in physiological angiogenesis and safeguarding against aberrant angiogenic responses.
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Affiliation(s)
- Hemabindu Chintala
- State University of New York (SUNY) Eye Institute and Department of Cell Biology, Downstate Medical Center, Brooklyn, NY 11203, USA
| | - Izabela Krupska
- State University of New York (SUNY) Eye Institute and Department of Cell Biology, Downstate Medical Center, Brooklyn, NY 11203, USA
| | - Lulu Yan
- State University of New York (SUNY) Eye Institute and Department of Cell Biology, Downstate Medical Center, Brooklyn, NY 11203, USA
| | - Lester Lau
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago College of Medicine, Chicago, IL 60607, USA
| | - Maria Grant
- Departments of Ophthalmology and Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Brahim Chaqour
- State University of New York (SUNY) Eye Institute and Department of Cell Biology, Downstate Medical Center, Brooklyn, NY 11203, USA Department of Ophthalmology, Downstate Medical Center, Brooklyn, NY 11203, USA
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Lee E, Kim DY, Chung E, Lee EA, Park KS, Son Y. Transplantation of cyclic stretched fibroblasts accelerates the wound-healing process in streptozotocin-induced diabetic mice. Cell Transplant 2014; 23:285-301. [PMID: 24622376 DOI: 10.3727/096368912x663541] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Mechanical stimulation is a known modulator of survival and proliferation for many cells, including endothelial cells, smooth muscle cells, and bone marrow-derived mesenchymal stem cells. In this study, we found that mechanical strain prevents apoptosis and increases the adhesive ability of dermal fibroblasts in vitro and thus confers the survival advantage in vivo after transplantation of fibroblasts into the full-thickness wound of diabetic mice. Cyclic stretch at a frequency of 0.5 Hz and maximum elongation of 20% stimulates cellular survival mediated by the activation of extracellular signal-regulated kinases (ERKs), c-Jun N-terminal kinases (JNKs), and the serine/threonine kinase Akt (AKT). Stretching of the fibroblasts increases the synthesis of extracellular matrix proteins and the formation of denser focal adhesion structures, both of which are required for fibroblast adhesion. The stretched fibroblasts also upregulate the expression of vascular endothelial growth factor (VEGF) and stromal cell-derived factor-1α (SDF-1α), which enhanced wound healing in vivo. Indeed, preconditioning with mechanical stretch allows better survival of the transplanted fibroblasts, when compared to unstretched control cells, in the wound environment of mice with streptozotocin-induced diabetes and thus accelerates the wound-healing process in these mice.
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Affiliation(s)
- Eunkyung Lee
- Department of Genetic Engineering, College of Life Science and Graduate School of Biotechnology, Kyung Hee University, Yongin, Korea
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Integration of proteomic and transcriptomic profiles identifies a novel PDGF-MYC network in human smooth muscle cells. Cell Commun Signal 2014; 12:44. [PMID: 25080971 PMCID: PMC4422302 DOI: 10.1186/s12964-014-0044-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 06/23/2014] [Indexed: 12/12/2022] Open
Abstract
Background Platelet-derived growth factor-BB (PDGF-BB) has been implicated in the proliferation, migration and synthetic activities of smooth muscle cells that characterize physiologic and pathologic tissue remodeling in hollow organs. However, neither the molecular basis of PDGFR-regulated signaling webs, nor the extent to which specific components within these networks could be exploited for therapeutic benefit has been fully elucidated. Results Expression profiling and quantitative proteomics analysis of PDGF-treated primary human bladder smooth muscle cells identified 1,695 genes and 241 proteins as differentially expressed versus non-treated cells. Analysis of gene expression data revealed MYC, JUN, EGR1, MYB, RUNX1, as the transcription factors most significantly networked with up-regulated genes. Forty targets were significantly altered at both the mRNA and protein levels. Proliferation, migration and angiogenesis were the biological processes most significantly associated with this signature, and MYC was the most highly networked master regulator. Alterations in master regulators and gene targets were validated in PDGF-stimulated smooth muscle cells in vitro and in a model of bladder injury in vivo. Pharmacologic inhibition of MYC and JUN confirmed their role in SMC proliferation and migration. Network analysis identified the diaphanous-related formin 3 as a novel PDGF target regulated by MYC and JUN, which was necessary for PDGF-stimulated lamellipodium formation. Conclusions These findings provide the first systems-level analysis of the PDGF-regulated transcriptome and proteome in normal smooth muscle cells. The analyses revealed an extensive cohort of PDGF-dependent biological processes and connected key transcriptional effectors to their regulation, significantly expanding current knowledge of PDGF-stimulated signaling cascades. These observations also implicate MYC as a novel target for pharmacological intervention in fibroproliferative expansion of smooth muscle, and potentially in cancers in which PDGFR-dependent signaling or MYC activation promote tumor progression.
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Imanaka-Yoshida K, Aoki H. Tenascin-C and mechanotransduction in the development and diseases of cardiovascular system. Front Physiol 2014; 5:283. [PMID: 25120494 PMCID: PMC4114189 DOI: 10.3389/fphys.2014.00283] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 07/10/2014] [Indexed: 12/14/2022] Open
Abstract
Living tissue is composed of cells and extracellular matrix (ECM). In the heart and blood vessels, which are constantly subjected to mechanical stress, ECM molecules form well-developed fibrous frameworks to maintain tissue structure. ECM is also important for biological signaling, which influences various cellular functions in embryonic development, and physiological/pathological responses to extrinsic stimuli. Among ECM molecules, increased attention has been focused on matricellular proteins. Matricellular proteins are a growing group of non-structural ECM proteins highly up-regulated at active tissue remodeling, serving as biological mediators. Tenascin-C (TNC) is a typical matricellular protein, which is highly expressed during embryonic development, wound healing, inflammation, and cancer invasion. The expression is tightly regulated, dependent on the microenvironment, including various growth factors, cytokines, and mechanical stress. In the heart, TNC appears in a spatiotemporal-restricted manner during early stages of development, sparsely detected in normal adults, but transiently re-expressed at restricted sites associated with tissue injury and inflammation. Similarly, in the vascular system, TNC is strongly up-regulated during embryonic development and under pathological conditions with an increase in hemodynamic stress. Despite its intriguing expression pattern, cardiovascular system develops normally in TNC knockout mice. However, deletion of TNC causes acute aortic dissection (AAD) under strong mechanical and humoral stress. Accumulating reports suggest that TNC may modulate the inflammatory response and contribute to elasticity of the tissue, so that it may protect cardiovascular tissue from destructive stress responses. TNC may be a key molecule to control cellular activity during development, adaptation, or pathological tissue remodeling.
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Affiliation(s)
- Kyoko Imanaka-Yoshida
- Department of Pathology and Matrix Biology, Mie University Graduate School of Medicine Tsu, Japan ; Mie University Research Center for Matrix Biology Tsu, Japan
| | - Hiroki Aoki
- Cardiovascular Research Institute, Kurume University Kurume, Japan
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Pellegrinelli V, Heuvingh J, du Roure O, Rouault C, Devulder A, Klein C, Lacasa M, Clément E, Lacasa D, Clément K. Human adipocyte function is impacted by mechanical cues. J Pathol 2014; 233:183-95. [PMID: 24623048 DOI: 10.1002/path.4347] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 02/21/2014] [Accepted: 02/27/2014] [Indexed: 12/22/2022]
Abstract
Fibrosis is a hallmark of human white adipose tissue (WAT) during obesity-induced chronic inflammation. The functional impact of increased interstitial fibrosis (peri-adipocyte fibrosis) on adjacent adipocytes remains unknown. Here we developed a novel in vitro 3D culture system in which human adipocytes and decellularized material of adipose tissue (dMAT) from obese subjects are embedded in a peptide hydrogel. When cultured with dMAT, adipocytes showed decreased lipolysis and adipokine secretion and increased expression/production of cytokines (IL-6, G-CSF) and fibrotic mediators (LOXL2 and the matricellular proteins THSB2 and CTGF). Moreover, some alterations including lipolytic activity and fibro-inflammation also occurred when the adipocyte/hydrogel culture was mechanically compressed. Notably, CTGF expression levels correlated with the amount of peri-adipocyte fibrosis in WAT from obese individuals. Moreover, dMAT-dependent CTGF promoter activity, which depends on β1-integrin/cytoskeleton pathways, was enhanced in the presence of YAP, a mechanosensitive co-activator of TEAD transcription factors. Mutation of TEAD binding sites abolished the dMAT-induced promoter activity. In conclusion, fibrosis may negatively affect human adipocyte function via mechanosensitive molecules, in part stimulated by cell deformation.
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Affiliation(s)
- V Pellegrinelli
- INSERM, UMR S 1166, Nutriomics Team, Paris, France; Sorbonne Universités, UPMC University of Paris 06, UMR S 1166, ICAN, Paris, France
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Wang J, Lü D, Mao D, Long M. Mechanomics: an emerging field between biology and biomechanics. Protein Cell 2014; 5:518-31. [PMID: 24756566 PMCID: PMC4085284 DOI: 10.1007/s13238-014-0057-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 03/10/2014] [Indexed: 12/31/2022] Open
Abstract
Cells sense various in vivo mechanical stimuli, which initiate downstream signaling to mechanical forces. While a body of evidences is presented on the impact of limited mechanical regulators in past decades, the mechanisms how biomechanical responses globally affect cell function need to be addressed. Complexity and diversity of in vivo mechanical clues present distinct patterns of shear flow, tensile stretch, or mechanical compression with various parametric combination of its magnitude, duration, or frequency. Thus, it is required to understand, from the viewpoint of mechanobiology, what mechanical features of cells are, why mechanical properties are different among distinct cell types, and how forces are transduced to downstream biochemical signals. Meanwhile, those in vitro isolated mechanical stimuli are usually coupled together in vivo, suggesting that the different factors that are in effect individually could be canceled out or orchestrated with each other. Evidently, omics analysis, a powerful tool in the field of system biology, is advantageous to combine with mechanobiology and then to map the full-set of mechanically sensitive proteins and transcripts encoded by its genome. This new emerging field, namely mechanomics, makes it possible to elucidate the global responses under systematically-varied mechanical stimuli. This review discusses the current advances in the related fields of mechanomics and elaborates how cells sense external forces and activate the biological responses.
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Affiliation(s)
- Jiawen Wang
- Center for Biomechanics and Bioengineering and Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China
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Correlations Between CCN1 Immunoexpression and Myocardial Histologic Lesions in Sudden Cardiac Death. Am J Forensic Med Pathol 2013; 34:169-76. [DOI: 10.1097/paf.0b013e31828d69b5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Nishikawa N, Kanematsu A, Negoro H, Imamura M, Sugino Y, Okinami T, Yoshimura K, Hashitani H, Ogawa O. PTHrP is endogenous relaxant for spontaneous smooth muscle contraction in urinary bladder of female rat. Endocrinology 2013; 154:2058-68. [PMID: 23546599 DOI: 10.1210/en.2012-2142] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Acute bladder distension causes various morphologic and functional changes, in part through altered gene expression. We aimed to investigate the physiologic role of PTHrP, which is up-regulated in an acute bladder distension model in female rats. In the control Empty group, bladders were kept empty for 6 hours, and in the Distension group, bladders were kept distended for 3 hours after an artificial storing-voiding cycle for 3 hours. In the Distention group bladder, up-regulation of transcripts was noted for 3 genes reported to be up-regulated by stretch in the cultured bladder smooth muscle cells in vitro. Further transcriptome analysis by microarray identified PTHrP as the 22nd highest gene up-regulated in Distension group bladder, among more than 27,000 genes. Localization of PTHrP and its functional receptor, PTH/PTHrP receptor 1 (PTH1R), were analyzed in the untreated rat bladders and cultured bladder cells using real-time RT-PCR and immunoblotting, which revealed that PTH1R and PTHrP were more predominantly expressed in smooth muscle than in urothelium. Exogenous PTHrP peptide (1-34) increased intracellular cAMP level in cultured bladder smooth muscle cells. In organ bath study using bladder strips, the PTHrP peptide caused a marked reduction in the amplitude of spontaneous contraction but caused only modest suppression for carbachol-induced contraction. In in vivo functional study by cystometrogram, the PTHrP peptide decreased voiding pressure and increased bladder compliance. Thus, PTHrP is a potent endogenous relaxant of bladder contraction, and autocrine or paracrine mechanism of the PTHrP-PTH1R axis is a physiologically relevant pathway functioning in the bladder.
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MESH Headings
- Animals
- Carbachol/pharmacology
- Cells, Cultured
- Cholinergic Agonists/pharmacology
- Cyclic AMP/metabolism
- Female
- Gene Expression Profiling
- Immunoblotting
- In Vitro Techniques
- Muscle Contraction/genetics
- Muscle Contraction/physiology
- Muscle, Smooth/metabolism
- Muscle, Smooth/physiopathology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Oligonucleotide Array Sequence Analysis
- Parathyroid Hormone-Related Protein/genetics
- Parathyroid Hormone-Related Protein/metabolism
- Parathyroid Hormone-Related Protein/physiology
- Peptide Fragments/pharmacology
- Rats
- Rats, Sprague-Dawley
- Receptor, Parathyroid Hormone, Type 1/genetics
- Receptor, Parathyroid Hormone, Type 1/metabolism
- Receptor, Parathyroid Hormone, Type 1/physiology
- Reverse Transcriptase Polymerase Chain Reaction
- Urinary Bladder/metabolism
- Urinary Bladder/physiopathology
- Urinary Retention/genetics
- Urinary Retention/metabolism
- Urinary Retention/physiopathology
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Affiliation(s)
- Nobuyuki Nishikawa
- Department of Urology, Kyoto University Graduate School of Medicine, Kyoto, 606-8507, Japan
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Furumatsu T, Matsumoto E, Kanazawa T, Fujii M, Lu Z, Kajiki R, Ozaki T. Tensile strain increases expression of CCN2 and COL2A1 by activating TGF-β-Smad2/3 pathway in chondrocytic cells. J Biomech 2013; 46:1508-15. [PMID: 23631855 DOI: 10.1016/j.jbiomech.2013.03.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 03/23/2013] [Accepted: 03/30/2013] [Indexed: 10/26/2022]
Abstract
Physiologic mechanical stress stimulates expression of chondrogenic genes, such as multifunctional growth factor CYR61/CTGF/NOV (CCN) 2 and α1(II) collagen (COL2A1), and maintains cartilage homeostasis. In our previous studies, cyclic tensile strain (CTS) induces nuclear translocation of transforming growth factor (TGF)-β receptor-regulated Smad2/3 and the master chondrogenic transcription factor Sry-type HMG box (SOX) 9. However, the precise mechanism of stretch-mediated Smad activation remains unclear in transcriptional regulation of CCN2 and COL2A1. Here we hypothesized that CTS may induce TGF-β1 release and stimulate Smad-dependent chondrogenic gene expression in human chondrocytic SW1353 cells. Uni-axial CTS (0.5Hz, 5% strain) stimulated gene expression of CCN2 and COL2A1 in SW1353 cells, and induced TGF-β1 secretion. CCN2 synthesis and nuclear translocalization of Smad2/3 and SOX9 were stimulated by CTS. In addition, CTS increased the complex formation between phosphorylated Smad2/3 and SOX9. The CCN2 promoter activity was cooperatively enhanced by CTS and Smad3 in luciferase reporter assay. Chromatin immunoprecipitation revealed that CTS increased Smad2/3 interaction with the CCN2 promoter and the COL2A1 enhancer. Our results suggest that CTS epigenetically stimulates CCN2 transcription via TGF-β1 release associated with Smad2/3 activation and enhances COL2A1 expression through the complex formation between SOX9 and Smad2/3.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama 700-8558, Japan.
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Chaqour B. Molecular control of vascular development by the matricellular proteins CCN1 ( Cyr61) and CCN2 ( CTGF). TRENDS IN DEVELOPMENTAL BIOLOGY 2013; 7:59-72. [PMID: 24748747 PMCID: PMC3989895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The circulatory system is the first hierarchically ordered network to form during the development of vertebrates as it is an indispensable means of adequate oxygen and nutrient delivery to developing organs. During the initial phase of vascular development, endothelial lineage-committed cells differentiate, migrate, and coalesce to form the central large axial vessels and their branches. The subsequent phase of vessel expansion (i.e., angiogenesis) involves a cascade of events including endothelial cell migration, proliferation, formation of an immature capillary structure, recruitment of mural cells and deposition of a basement membrane to yield a functional vasculature. These series of events are tightly regulated by the coordinated expression of several angiogenic, morphogenic and guidance factors. The extracellular matrix (ECM) is synthesized and secreted by embryonic cells at the earliest stages of development and forms a pericellular network of bioactive stimulatory and inhibitory angiogenesis regulatory factors. Here we describe the role of a subset of inducible immediate-early gene-encoded, ECM-associated integrin- and heparin-binding proteins referred to as CCN1 (or Cyr61) and CCN2 (or CTGF) and their function in the development of the vascular system. Gene-targeting experiments in mice have identified CCN1 and CCN2 as critical rate-limiting determinants of endothelial cell differentiation and quiescence, mural cell recruitment and basement membrane formation during embryonic vascular development. Emphasis will be placed on the regulation and function of these molecules and their contextual mode of action during vascular development. Further understanding of the mechanisms of CCN1- and CCN2-mediated blood vessel expansion and remodeling would enhance the prospects that these molecules provide for the development of new treatments for vascular diseases.
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Chaqour B. New Insights into the Function of the Matricellular CCN1: an Emerging Target in Proliferative Retinopathies. J Ophthalmic Vis Res 2013; 8:77-82. [PMID: 23825719 PMCID: PMC3691969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Furumatsu T, Kanazawa T, Miyake Y, Kubota S, Takigawa M, Ozaki T. Mechanical stretch increases Smad3-dependent CCN2 expression in inner meniscus cells. J Orthop Res 2012; 30:1738-45. [PMID: 22576977 DOI: 10.1002/jor.22142] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Accepted: 04/20/2012] [Indexed: 02/04/2023]
Abstract
The intrinsic zone-specific properties of the menisci are determined by biomechanical environments. In this study, we examined mechanical stretch-dependent expression of multifunctional growth factor CYR61/CTGF/NOV (CCN) 2, and investigated the role of CCN2 in meniscus cells. Uni-axial cyclic tensile strain (CTS) was applied using a STB-140 system. CTS-induced expression of CCN2 and α1(I) collagen (COL1A1) was assessed by quantitative real-time PCR analysis. The distribution of CCN2 and Smad2/3 in stretched cells was investigated by immunohistochemical analysis. Smad2/3-dependent CCN2 transactivation was measured by luciferase reporter assay. The relationship between Smad2/3 and CTS-induced CCN2 transcription was investigated by chromatin immunoprecipitation. CTS stimulated gene expression of CCN2 and COL1A1 in inner meniscus cells, but not in outer meniscus cells. Recombinant CCN2 increased COL1A1 expression only in inner meniscus cells. CCN2 synthesis and nuclear translocalization of phosphorylated Smad2/3 in inner meniscus cells were stimulated by CTS. The CCN2 promoter activity was synergistically enhanced by overexpressed Smad3 in stretched inner meniscus cells, but was not by Smad2. Chromatin immunoprecipitation revealed that CTS increased the association between Smad3 and the Smad-binding element on the CCN2 proximal promoter in inner meniscus cells. Our results suggest that stretch-induced CCN2 may have a crucial role in regulating COL1A1 expression in the inner meniscus.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan
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Abstract
Heart failure (HF) remains a major growing public health problem in the United States. Despite extensive understanding of the mechanism at the molecular level and innovations in therapy, HF carries high morbidity and mortality rates, with frequent hospital admissions. In the Medicare population, HF is the leading cause for hospitalization, accounting for more than1 million admissions per year. The authors provide a review of the epidemiology and pathophysiology of HF.
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Affiliation(s)
- Shradha Rathi
- Cardiology Department, UCSF Fresno Cardiology, Fresno, CA 93721, USA
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Abstract
Tenascins are large glycoproteins found in embryonic and adult extracellular matrices. Of the four family members, two have been shown to be overexpressed in the microenvironment of solid tumours: tenascin-C and tenascin-W. The regular presence of these proteins in tumours suggests a role in tumourigenesis, which has been investigated intensively for tenascin-C and recently for tenascin-W as well. In this review, we follow a malignant cell starting from its birth through its potential metastatic journey and describe how tenascin-C and tenascin-W contribute to these successive steps of tumourigenesis. We consider the importance of the mechanical aspect in tenascin signalling. Furthermore, we discuss studies describing tenascin-C as an important component of stem cell niches and present examples reporting its role in cancer therapy resistance.
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Affiliation(s)
- Florence Brellier
- Friedrich Miescher Institute for Biomedical Research, Novartis Research Foundation, Basel, Switzerland
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Ramachandran A, Gong EM, Pelton K, Ranpura SA, Mulone M, Seth A, Gomez P, Adam RM. FosB regulates stretch-induced expression of extracellular matrix proteins in smooth muscle. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:2977-89. [PMID: 21996678 DOI: 10.1016/j.ajpath.2011.08.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2011] [Revised: 07/29/2011] [Accepted: 08/09/2011] [Indexed: 11/19/2022]
Abstract
Fibroproliferative remodeling in smooth muscle-rich hollow organs is associated with aberrant extracellular matrix (ECM) production. Although mechanical stimuli regulate ECM protein expression, the transcriptional mediators of this process remain poorly defined. Previously, we implicated AP-1 as a mediator of smooth muscle cell (SMC) mechanotransduction; however, its role in stretch-induced ECM regulation has not been explored. Herein, we identify a novel role for the AP-1 subunit FosB in stretch-induced ECM expression in SMCs. The DNA-binding activity of AP-1 increased after stretch stimulation of SMCs in vitro. In contrast to c-Jun and c-fos, which are also activated by the SMC mitogen platelet-derived growth factor, FosB was only activated by stretch. FosB silencing attenuated the expression of the profibrotic factors tenascin C (TNC) and connective tissue growth factor (CTGF), whereas forced expression of Jun~FosB stimulated TNC and CTGF promoter activity. Chromatin immunoprecipitation revealed enrichment of AP-1 at the TNC and CTGF promoters. Bladder distension in vivo enhanced nuclear localization of c-jun and FosB. Finally, the distension-induced expression of TNC and CTGF in the detrusor smooth muscle of bladders from wild-type mice was significantly attenuated in FosB-null mice. Together, these findings identify FosB as a mechanosensitive regulator of ECM production in smooth muscle.
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Affiliation(s)
- Aruna Ramachandran
- Urological Diseases Research Center, Children's Hospital Boston, Boston, Massachusetts 02115, USA
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Angiogenesis gene expression in murine endothelial cells during post-pneumonectomy lung growth. Respir Res 2011; 12:98. [PMID: 21794125 PMCID: PMC3199770 DOI: 10.1186/1465-9921-12-98] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 07/27/2011] [Indexed: 11/10/2022] Open
Abstract
Although blood vessel growth occurs readily in the systemic bronchial circulation, angiogenesis in the pulmonary circulation is rare. Compensatory lung growth after pneumonectomy is an experimental model with presumed alveolar capillary angiogenesis. To investigate the genes participating in murine neoalveolarization, we studied the expression of angiogenesis genes in lung endothelial cells. After left pneumonectomy, the remaining right lung was examined on days 3, 6, 14 and 21days after surgery and compared to both no surgery and sham thoracotomy controls. The lungs were enzymatically digested and CD31+ endothelial cells were isolated using flow cytometry cell sorting. The transcriptional profile of the CD31+ endothelial cells was assessed using quantitative real-time polymerase chain reaction (PCR) arrays. Focusing on 84 angiogenesis-associated genes, we identified 22 genes with greater than 4-fold regulation and significantly enhanced transcription (p <.05) within 21 days of pneumonectomy. Cluster analysis of the 22 genes indicated that changes in gene expression did not occur in a single phase, but in at least four waves of gene expression: a wave demonstrating decreased gene expression more than 3 days after pneumonectomy and 3 sequential waves of increased expression on days 6, 14, and 21 after pneumonectomy. These findings indicate that a network of gene interactions contributes to angiogenesis during compensatory lung growth.
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Miyake Y, Furumatsu T, Kubota S, Kawata K, Ozaki T, Takigawa M. Mechanical stretch increases CCN2/CTGF expression in anterior cruciate ligament-derived cells. Biochem Biophys Res Commun 2011; 409:247-52. [DOI: 10.1016/j.bbrc.2011.04.138] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Accepted: 04/28/2011] [Indexed: 01/13/2023]
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Guo F, Carter DE, Leask A. Mechanical tension increases CCN2/CTGF expression and proliferation in gingival fibroblasts via a TGFβ-dependent mechanism. PLoS One 2011; 6:e19756. [PMID: 21611193 PMCID: PMC3096639 DOI: 10.1371/journal.pone.0019756] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 04/10/2011] [Indexed: 12/03/2022] Open
Abstract
Unlike skin, oral gingival do not scar in response to tissue injury. Fibroblasts,
the cell type responsible for connective tissue repair and scarring, are exposed
to mechanical tension during normal and pathological conditions including wound
healing and fibrogenesis. Understanding how human gingival fibroblasts respond
to mechanical tension is likely to yield valuable insights not only into
gingival function but also into the molecular basis of scarless repair.
CCN2/connective tissue growth factor is potently induced in fibroblasts during
tissue repair and fibrogenesis. We subjected gingival fibroblasts to cyclical
strain (up to 72 hours) using the Flexercell system and showed that CCN2 mRNA
and protein was induced by strain. Strain caused the rapid activation of latent
TGFβ, in a fashion that was reduced by blebbistatin and FAK/src inhibition,
and the induction of endothelin (ET-1) mRNA and protein expression. Strain did
not cause induction of α-smooth muscle actin or collagen type I mRNAs
(proteins promoting scarring); but induced a cohort of pro-proliferative mRNAs
and cell proliferation. Compared to dermal fibroblasts, gingival fibroblasts
showed reduced ability to respond to TGFβ by inducing fibrogenic mRNAs;
addition of ET-1 rescued this phenotype. Pharmacological inhibition of the
TGFβ type I (ALK5) receptor, the endothelin A/B receptors and FAK/src
significantly reduced the induction of CCN2 and pro-proliferative mRNAs and cell
proliferation. Controlling TGFβ, ET-1 and FAK/src activity may be useful in
controlling responses to mechanical strain in the gingiva and may be of value in
controlling fibroproliferative conditions such as gingival hyperplasia;
controlling ET-1 may be of benefit in controlling scarring in response to injury
in the skin.
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Affiliation(s)
- Fen Guo
- Department of Dentistry, University of Western
Ontario, London, Ontario, Canada
| | - David E. Carter
- London Regional Genomics Centre Microarray
Facility, Robarts Research Institute, London, Ontario, Canada
| | - Andrew Leask
- Department of Dentistry, University of Western
Ontario, London, Ontario, Canada
- Department of Physiology and Pharmacology,
University of Western Ontario, London, Ontario, Canada
- * E-mail:
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Christiaansen CE, Sun Y, Hsu YC, Chai TC. Alterations in expression of HIF-1α, HIF-2α, and VEGF by idiopathic overactive bladder urothelial cells during stretch suggest role for hypoxia. Urology 2011; 77:1266.e7-11. [PMID: 21397301 DOI: 10.1016/j.urology.2010.12.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 12/22/2010] [Accepted: 12/22/2010] [Indexed: 10/18/2022]
Abstract
OBJECTIVES To test the hypothesis that hypoxia plays a role in overactive bladder (OAB) symptoms by studying how the in vitro stretch of primary cultured bladder urothelial cells (BUCs) from those with OAB and asymptomatic subjects altered the expression of angiogenic factors. The angiogenic factors included hypoxia-inducible factor-1 alpha subunit (HIF-1α), HIF-2 alpha subunit (HIF-2α), and vascular endothelial growth factor (VEGF). METHODS HIF-1α, HIF-2α, and VEGF mRNA expression were analyzed using real-time quantitative polymerase chain reaction. Fluorescence-activated cell sorting was used to measure the protein expression. The release of VEGF in the supernatant of stretched OAB and normal BUCs was measured using enzyme-linked immunosorbent assay. RESULTS Stretching of OAB BUCs increased the expression of mRNA for HIF-1α, HIF-2α, and VEGF by 1.5-fold (P < .01), 1.5-fold (P < .01), and 3.5-fold (P < .001) compared with unstretched OAB BUCs. This augmentation was not detected when comparing stretched normal BUCs with unstretched normal BUCs. Using fluorescence-activated cell sorting quantitation, only HIF-2α was significantly increased (P < .01). Measuring VEGF in the supernatant revealed that stretched OAB BUCs released significantly more VEGF than nonstretched OAB BUCs at multiple points. In contrast, stretched normal BUCs did not release VEGF. CONCLUSIONS OAB BUCs responded to stretch by expressing increased angiogenic markers, HIF-1α, HIF-2α, and/or VEGF, measured at the transcript and protein levels. This suggests that OAB BUCs respond as if they were primed by hypoxia. This knowledge adds to the pathophysiologic understanding of OAB.
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Hasan A, Pokeza N, Shaw L, Lee HS, Lazzaro D, Chintala H, Rosenbaum D, Grant MB, Chaqour B. The matricellular protein cysteine-rich protein 61 (CCN1/Cyr61) enhances physiological adaptation of retinal vessels and reduces pathological neovascularization associated with ischemic retinopathy. J Biol Chem 2011; 286:9542-54. [PMID: 21212276 DOI: 10.1074/jbc.m110.198689] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Retinal vascular damages are the cardinal hallmarks of retinopathy of prematurity (ROP), a leading cause of vision impairment and blindness in childhood. Both angiogenesis and vasculogenesis are disrupted in the hyperoxia-induced vaso-obliteration phase, and recapitulated, although aberrantly, in the subsequent ischemia-induced neovessel formation phase of ROP. Yet, whereas the histopathological features of ROP are well characterized, many key modulators with a therapeutic potential remain unknown. The CCN1 protein also known as cysteine-rich protein 61 (Cyr61) is a dynamically expressed, matricellular protein required for proper angiogenesis and vasculogenesis during development. The expression of CCN1 becomes abnormally reduced during the hyperoxic and ischemic phases of ROP modeled in the mouse eye with oxygen-induced retinopathy (OIR). Lentivirus-mediated re-expression of CCN1 enhanced physiological adaptation of the retinal vasculature to hyperoxia and reduced pathological angiogenesis following ischemia. Remarkably, injection into the vitreous of OIR mice of hematopoietic stem cells (HSCs) engineered to express CCN1 harnessed ischemia-induced neovessel outgrowth without adversely affecting the physiological adaptation of retinal vessels to hyperoxia. In vitro exposure of HSCs to recombinant CCN1 induced integrin-dependent cell adhesion, migration, and expression of specific endothelial cell markers as well as many components of the Wnt signaling pathway including Wnt ligands, their receptors, inhibitors, and downstream targets. CCN1-induced Wnt signaling mediated, at least in part, adhesion and endothelial differentiation of cultured HSCs, and inhibition of Wnt signaling interfered with normalization of the retinal vasculature induced by CCN1-primed HSCs in OIR mice. These newly identified functions of CCN1 suggest its possible therapeutic utility in ischemic retinopathy.
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Affiliation(s)
- Adeel Hasan
- Department of Cell Biology, Downstate Medical Center, Brooklyn, New York 11203, USA
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Metcalfe PD, Wang J, Jiao H, Huang Y, Hori K, Moore RB, Tredget EE. Bladder outlet obstruction: progression from inflammation to fibrosis. BJU Int 2010; 106:1686-94. [DOI: 10.1111/j.1464-410x.2010.09445.x] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Miyamoto S, Del Re DP, Xiang SY, Zhao X, Florholmen G, Brown JH. Revisited and revised: is RhoA always a villain in cardiac pathophysiology? J Cardiovasc Transl Res 2010; 3:330-43. [PMID: 20559774 DOI: 10.1007/s12265-010-9192-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Accepted: 04/22/2010] [Indexed: 01/10/2023]
Abstract
The neonatal rat ventricular myocyte model of hypertrophy has provided tremendous insight with regard to signaling pathways regulating cardiac growth and gene expression. Many mediators thus discovered have been successfully extrapolated to the in vivo setting, as assessed using genetically engineered mice and physiological interventions. Studies in neonatal rat ventricular myocytes demonstrated a role for the small G-protein RhoA and its downstream effector kinase, Rho-associated coiled-coil containing protein kinase (ROCK), in agonist-mediated hypertrophy. Transgenic expression of RhoA in the heart does not phenocopy this response, however, nor does genetic deletion of ROCK prevent hypertrophy. Pharmacologic inhibition of ROCK has effects most consistent with roles for RhoA signaling in the development of heart failure or responses to ischemic damage. Whether signals elicited downstream of RhoA promote cell death or survival and are deleterious or salutary is, however, context and cell-type dependent. The concepts discussed above are reviewed, and the hypothesis that RhoA might protect cardiomyocytes from ischemia and other insults is presented. Novel RhoA targets including phospholipid regulated and regulating enzymes (Akt, PI kinases, phospholipase C, protein kinases C and D) and serum response element-mediated transcriptional responses are considered as possible pathways through which RhoA could affect cardiomyocyte survival.
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Affiliation(s)
- Shigeki Miyamoto
- Department of Pharmacology, University of California, 9500 Gilman Dr., La Jolla, San Diego, CA 92093-0636, USA
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Abstract
From the earliest studies with epithelial cells implanted into detrusor muscle to later experiments on smooth muscle in defined collagen gels, cell niche and extracellular matrix (ECM) have been clearly shown to orchestrate cellular behavior and fate whether quiescent, migratory, or proliferative. Normal matrix can revert transformed cells to quiescence, and damaged matrix can trigger malignancy or dedifferentiation. ECM influence in disease, development, healing and regeneration has been demonstrated in many other fields of study, but a thorough examination of the roles of ECM in bladder cell activity has not yet been undertaken. Structural ECM proteins, in concert with adhesive proteins, provide crucial structural support to the bladder. Both structural and nonstructural components of the bladder have major effects on smooth muscle function, through effects on matrix rigidity and signaling through ECM receptors. While many ECM components and receptors identified in the bladder have specific known functions in the vascular smooth musculature, their function in the bladder is often less well defined. In cancer and obstructive disease, the ECM has a critical role in pathogenesis. The challenge in these settings will be to find therapies that prevent hyperproliferation and encourage proper differentiation, through an understanding of matrix effects on cell biology and susceptibility to therapeutics.
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Attia E, Brown H, Henshaw R, George S, Hannafin JA. Patterns of gene expression in a rabbit partial anterior cruciate ligament transection model: the potential role of mechanical forces. Am J Sports Med 2010; 38:348-56. [PMID: 19966107 DOI: 10.1177/0363546509348052] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The inconsistency in healing after anterior cruciate ligament (ACL) repair has been attributed to ACL fibroblast cellular metabolism, lack of a sufficient vascular supply, and the inability to form a scar or scaffold after ligament rupture because of the uniqueness of the intra-articular environment. Hypotheses (1) Stress deprivation in the surgically transected ACL will increase matrix metalloproteinase (MMP) and alpha smooth muscle actin (alpha-SMA) expression. (2) Stress deprivation will decrease collagen expression. (3) The transected anteromedial bundle of the ACL will demonstrate a pattern of gene expression similar to the completely transected ACL, while gene expression profiles in the intact posterolateral bundle will be similar to the sham-operated controls. STUDY DESIGN Controlled laboratory study. METHODS Thirty-six New Zealand White rabbits underwent a partial ACL surgical transection separating the anteromedial (AM) and posterolateral (PL) bundles and transecting the AM bundle. Contralateral ACLs were either sham operated or completely transected. Ligament tissue was harvested at 1, 2, or 6 weeks after surgery, and real-time PCR was performed using primers for collagen I, collagen III, alpha-SMA, MMP-1, and MMP-13. RESULTS At 1 week, a 28- and 29-fold increase in MMP-13 expression was seen in the complete transection and the transected AM bundle specimens when compared with sham-operated controls (P = .049, P = .018), respectively. There was no significant difference in MMP-13 between the sham controls and the intact PL bundle specimens. A 22- and 23-fold increase in alpha-SMA was seen (P = .03, P = .009) in the complete transection and transected AM bundle specimens, respectively, while no difference was seen between the intact PL bundle and controls. No significant differences were seen in collagen I (Col I) or collagen III (Col III) gene expression at 1 week. At 6 weeks, Col I expression increased 5-fold in complete transection samples (P = 3.9 x 10(-6)), 3-fold in transected AM samples (P = 3.3 x 10(-6)), and 2-fold in the intact PL bundle samples as compared with controls. alpha-SMA was increased 7.5-fold and 5-fold in complete transection and transected AM samples, respectively (P = .004, P = 2.2 x 10(-6)), while no significant change was seen in the intact PL bundle samples compared with controls. Complete transection specimens showed a 3-fold increase in MMP-1 expression. Col III increased 5.4-, 2.6-, and 2.4-fold in the complete transection, transected AM, and intact PL groups, respectively (P = .003, P = .004, P = .04). CONCLUSION Partial or complete surgical transection of the rabbit ACL with resultant loss of mechanical stimuli results in an increase in MMP-13 and alpha-SMA expression at the early time point (1 week) and an increase in alpha-SMA, Col I, and Col III expression at the later time point (6 weeks). These data provide support for the hypothesis that there is a time-dependent alteration of anabolic and catabolic matrix gene expression after injury/loss of ligament integrity. Clinical Relevance Identification of pathways that respond to mechanical stress in the intact ACL and after surgical transection may permit development of novel therapies to alter healing of the partial ACL injury or to assist in the development of biomechanical active ''smart'' scaffolds for tissue-engineered ligament replacements.
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Affiliation(s)
- Erik Attia
- Laboratory for Soft Tissue Research, Tissue Engineering Repair and Regeneration Program, Hospital for Special Surgery, New York, New York 10021, USA.
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McGivney BA, Eivers SS, MacHugh DE, MacLeod JN, O'Gorman GM, Park SDE, Katz LM, Hill EW. Transcriptional adaptations following exercise in thoroughbred horse skeletal muscle highlights molecular mechanisms that lead to muscle hypertrophy. BMC Genomics 2009; 10:638. [PMID: 20042072 PMCID: PMC2812474 DOI: 10.1186/1471-2164-10-638] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Accepted: 12/30/2009] [Indexed: 12/23/2022] Open
Abstract
Background Selection for exercise-adapted phenotypes in the Thoroughbred racehorse has provided a valuable model system to understand molecular responses to exercise in skeletal muscle. Exercise stimulates immediate early molecular responses as well as delayed responses during recovery, resulting in a return to homeostasis and enabling long term adaptation. Global mRNA expression during the immediate-response period has not previously been reported in skeletal muscle following exercise in any species. Also, global gene expression changes in equine skeletal muscle following exercise have not been reported. Therefore, to identify novel genes and key regulatory pathways responsible for exercise adaptation we have used equine-specific cDNA microarrays to examine global mRNA expression in skeletal muscle from a cohort of Thoroughbred horses (n = 8) at three time points (before exercise, immediately post-exercise, and four hours post-exercise) following a single bout of treadmill exercise. Results Skeletal muscle biopsies were taken from the gluteus medius before (T0), immediately after (T1) and four hours after (T2) exercise. Statistically significant differences in mRNA abundance between time points (T0 vs T1 and T0 vs T2) were determined using the empirical Bayes moderated t-test in the Bioconductor package Linear Models for Microarray Data (LIMMA) and the expression of a select panel of genes was validated using real time quantitative reverse transcription PCR (qRT-PCR). While only two genes had increased expression at T1 (P < 0.05), by T2 932 genes had increased (P < 0.05) and 562 genes had decreased expression (P < 0.05). Functional analysis of genes differentially expressed during the recovery phase (T2) revealed an over-representation of genes localized to the actin cytoskeleton and with functions in the MAPK signalling, focal adhesion, insulin signalling, mTOR signaling, p53 signaling and Type II diabetes mellitus pathways. At T1, using a less stringent statistical approach, we observed an over-representation of genes involved in the stress response, metabolism and intracellular signaling. These findings suggest that protein synthesis, mechanosensation and muscle remodeling contribute to skeletal muscle adaptation towards improved integrity and hypertrophy. Conclusions This is the first study to characterize global mRNA expression profiles in equine skeletal muscle using an equine-specific microarray platform. Here we reveal novel genes and mechanisms that are temporally expressed following exercise providing new knowledge about the early and late molecular responses to exercise in the equine skeletal muscle transcriptome.
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Affiliation(s)
- Beatrice A McGivney
- Animal Genomics Laboratory, UCD School of Agriculture, Food Science and Veterinary Medicine, UCD College of Life Sciences, University College Dublin, Belfield, Dublin 4, Ireland.
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Tsuruda T, Hatakeyama K, Masuyama H, Sekita Y, Imamura T, Asada Y, Kitamura K. Pharmacological stimulation of soluble guanylate cyclase modulates hypoxia-inducible factor-1alpha in rat heart. Am J Physiol Heart Circ Physiol 2009; 297:H1274-80. [PMID: 19684186 DOI: 10.1152/ajpheart.00503.2009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Mechanical load and ischemia induce a series of adaptive physiological responses by activating the expression of O(2)-regulated genes, such as hypoxia inducible factor-1alpha (HIF-1alpha). The aim of this study was to explore the interaction between HIF-1alpha and soluble guanylate cyclase (sGC) and its second messenger cGMP in cultured cardiomyocytes exposed to hypoxia and in pressure-overloaded heart. In cultured cardiomyocytes of neonatal rats, either sGC stimulator BAY 41-2272 or cGMP analog 8-bromo-cGMP decreased the hypoxia (1% O(2)/5% CO(2))-induced HIF-1alpha expression, whereas the inhibition of protein kinase G by KT-5823 reversed the effect of BAY 41-2272 on the expression under hypoxic conditions. In pressure-overloaded heart induced by suprarenal aortic constriction (AC) in 7-wk-old male Wistar rats, the administration of BAY 41-2272 (2 mg.kg(-1).day(-1)) for 14 days significantly suppressed the protein expression of HIF-1alpha (P < 0.05), vascular endothelial growth factor (P < 0.01), and the number of capillary vessels (P < 0.01) induced by pressure overload. This study suggests that the pharmacological sGC-cGMP stimulation modulates the HIF-1alpha expression in response to hypoxia or mechanical load in the heart.
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Affiliation(s)
- Toshihiro Tsuruda
- Faculty of Medicine, Department of Internal Medicine, Circulatory and Body Fluid Regulation, University of Miyazaki, Miyazaki, Japan.
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Hanna M, Liu H, Amir J, Sun Y, Morris SW, Siddiqui MAQ, Lau LF, Chaqour B. Mechanical regulation of the proangiogenic factor CCN1/CYR61 gene requires the combined activities of MRTF-A and CREB-binding protein histone acetyltransferase. J Biol Chem 2009; 284:23125-36. [PMID: 19542562 DOI: 10.1074/jbc.m109.019059] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Smooth muscle-rich tissues respond to mechanical overload by an adaptive hypertrophic growth combined with activation of angiogenesis, which potentiates their mechanical overload-bearing capabilities. Neovascularization is associated with mechanical strain-dependent induction of angiogenic factors such as CCN1, an immediate-early gene-encoded matricellular molecule critical for vascular development and repair. Here we have demonstrated that mechanical strain-dependent induction of the CCN1 gene involves signaling cascades through RhoA-mediated actin remodeling and the p38 stress-activated protein kinase (SAPK). Actin signaling controls serum response factor (SRF) activity via SRF interaction with the myocardin-related transcriptional activator (MRTF)-A and tethering to a single CArG box sequence within the CCN1 promoter. Such activity was abolished in mechanically stimulated mouse MRTF-A(-/-) cells or upon inhibition of CREB-binding protein (CBP) histone acetyltransferase (HAT) either pharmacologically or by siRNAs. Mechanical strain induced CBP-mediated acetylation of histones 3 and 4 at the SRF-binding site and within the CCN1 gene coding region. Inhibition of p38 SAPK reduced CBP HAT activity and its recruitment to the SRF.MRTF-A complex, whereas enforced induction of p38 by upstream activators (e.g. MKK3 and MKK6) enhanced both CBP HAT and CCN1 promoter activities. Similarly, mechanical overload-induced CCN1 gene expression in vivo was associated with nuclear localization of MRTF-A and enrichment of the CCN1 promoter with both MRTF-A and acetylated histone H3. Taken together, these data suggest that signal-controlled activation of SRF, MRTF-A, and CBP provides a novel connection between mechanical stimuli and angiogenic gene expression.
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Affiliation(s)
- Mary Hanna
- Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, New York 11203, USA
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