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Sun J, Du Q, Zhao L, Huang J, Yu H, Ding H, Mao D, Tai S. Long non-coding RNA H19 mediates the miR-29b/transforming growth factor-β1/Drosophila mothers against decapentaplegic 3 signalling pathway to promote bladder fibrosis in diabetic rats. Int Urol Nephrol 2024:10.1007/s11255-024-03992-z. [PMID: 38530583 DOI: 10.1007/s11255-024-03992-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/10/2024] [Indexed: 03/28/2024]
Abstract
PURPOSE Diabetic bladder fibrosis is a common comorbidity. Altered expression of some long non-coding RNAs (LncRNAs) has been associated with bladder fibrosis. LncRNA H19 has been reported to regulate bladder cancer through miR-29b. However, the action mechanism of LncRNA H19 in bladder fibrosis is unclear. METHODS In vitro, human bladder smooth muscle cells (HBSMCs) were cultured with transforming growth factor-β1 (TGF-β1) for 48 h to construct cell model of bladder fibrosis. HBSMCs were then transfected with si-LncRNA H19, si-NC, miR-29b-mimic, mimic-NC, or miR-29b-inhibitor. In vivo, Sprague-Dawley (SD) rats were given a high-sucrose-high-fat (HSHF) diet for 4 weeks and injected with streptozotocin (STZ, 50 mg/kg) to induce bladder fibrosis model in diabetic rats, followed by injection of lentiviral particles knocking down LncRNA H19 expression, empty vector, or miR-29b-inhibitor, respectively. RESULTS LncRNA H19 was up-regulated in TGF-β1-induced HBSMC fibrosis and STZ-induced diabetic rat bladder fibrosis, whereas miR-29b was down-regulated. si-LncRNA H19 reduced blood glucose levels and improved histopathological damage of bladder tissue in rats. In addition, si-LncRNA H19 or miR-29b-mimic increased the expression of E-cadherin, but decreased the expression of N-cadherin, vimentin, fibronectin (FN) in bladder tissues, and HBSMCs. si-LncRNA H19 reduced TGF-β1/p-drosophila mothers against decapentaplegic 3 (Smad3) protein in HBSMCs and in rat bladder tissues, while miR-29b-inhibitor reversed the effect of si-LncRNA H19. CONCLUSION This study indicated that LncRNA H19 may inhibit bladder fibrosis in diabetic rats by targeting miR-29b via the TGF-β1/Smad3 signalling pathway.
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Affiliation(s)
- Ji Sun
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China
| | - Qiang Du
- Department of Anaesthesiology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, Hangzhou, 311202, Zhejiang, China
| | - Liwei Zhao
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China
| | - Jiaguo Huang
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China
| | - Hui Yu
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China
| | - Hongxiang Ding
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China
| | - Dikai Mao
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China
| | - Shengcheng Tai
- Department of Urology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, No. 728 North Yucai Road, Xiaoshan District, Hangzhou, 311202, Zhejiang, China.
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Gandhi P, Wang Y, Li G, Wang S. The role of long noncoding RNAs in ocular angiogenesis and vascular oculopathy. Cell Biosci 2024; 14:39. [PMID: 38521951 PMCID: PMC10961000 DOI: 10.1186/s13578-024-01217-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 03/05/2024] [Indexed: 03/25/2024] Open
Abstract
BACKGROUND Long noncoding RNAs (lncRNAs) are RNA transcripts over 200 nucleotides in length that do not code for proteins. Initially considered a genomic mystery, an increasing number of lncRNAs have been shown to have vital roles in physiological and pathological conditions by regulating gene expression through diverse mechanisms depending on their subcellular localization. Dysregulated angiogenesis is responsible for various vascular oculopathies, including diabetic retinopathy, retinopathy of prematurity, age-related macular degeneration, and corneal neovascularization. While anti-VEGF treatment is available, it is not curative, and long-term outcomes are suboptimal, and some patients are unresponsive. To better understand these diseases, researchers have investigated the role of lncRNAs in regulating angiogenesis and models of vascular oculopathies. This review summarizes recent research on lncRNAs in ocular angiogenesis, including the pro-angiogenic lncRNAs ANRIL, HOTAIR, HOTTIP, H19, IPW, MALAT1, MIAT, NEAT1, and TUG1, the anti-angiogenic lncRNAs MEG3 and PKNY, and the human/primate specific lncRNAs lncEGFL7OS, discussing their functions and mechanisms of action in vascular oculopathies.
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Affiliation(s)
- Pranali Gandhi
- Tulane University School of Medicine, New Orleans, LA, 70112, USA
| | - Yuzhi Wang
- Louisiana State University School of Medicine, New Orleans, LA, 70112, USA
| | - Guigang Li
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei province, P.R. China.
| | - Shusheng Wang
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, 70118, USA.
- Department of Ophthalmology, Tulane University, New Orleans, LA, 70112, USA.
- Tulane Personalized Health Institute, Tulane University, New Orleans, LA, 70112, USA.
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Zhao T, Sun Z, Lai X, Lu H, Liu L, Li S, Yuan JH, Guo Z. Tamoxifen exerts anti-peritoneal fibrosis effects by inhibiting H19-activated VEGFA transcription. J Transl Med 2023; 21:614. [PMID: 37697303 PMCID: PMC10494369 DOI: 10.1186/s12967-023-04470-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 08/25/2023] [Indexed: 09/13/2023] Open
Abstract
BACKGROUND Peritoneal dialysis (PD) remains limited due to dialysis failure caused by peritoneal fibrosis. Tamoxifen (TAM), an inhibitor of estrogen receptor 1 (ESR1), has been reported to treat fibrosis, but the underlying mechanism remains unknown. In this study, we sought to explore whether tamoxifen played an anti-fibrotic role by affecting transcription factor ESR1. METHODS ESR1 expression was detected in the human peritoneum. Mice were daily intraperitoneally injected with 4.25% glucose PD dialysate containing 40 mM methylglyoxal for 2 weeks to establish PD-induced peritoneal fibrosis. Tamoxifen was administrated by daily gavage, at the dose of 10 mg/kg. Chromatin immunoprecipitation (ChIP) and dual-luciferase reporter assay were performed to validate ESR1 bound H19 promoter. Gain-of-function and loss-of-function experiments were performed to investigate the biological roles of H19 on the mesothelial-mesenchymal transition (MMT) of human peritoneal mesothelial cells (HPMCs). Intraperitoneal injection of nanomaterial-wrapped 2'-O-Me-modified small interfering RNA was applied to suppress H19 in the mouse peritoneum. RNA immunoprecipitation and RNA pull-down assays demonstrated binding between H19 and p300. Exfoliated peritoneal cells were obtained from peritoneal dialysis effluent to analyze the correlations between ESR1 (or H19) and peritoneal solute transfer rate (PSTR). RESULTS ESR1 was increased significantly in the peritoneum after long-term exposure to PD dialysate. Tamoxifen treatment ameliorated high glucose-induced MMT of HPMCs, improved ultrafiltration rate, and decreased PSTR of mouse peritoneum. Tamoxifen reduced the H19 level by decreasing the ESR1 transcription of H19. Depletion of H19 reversed the pro-fibrotic effect of high glucose while ectopic expression of H19 exacerbated fibrotic pathological changes. Intraperitoneal injection of nanomaterial-wrapped 2'-O-Me-modified siRNAs targeting H19 mitigated PD-related fibrosis in mice. RNA immunoprecipitation (RIP) and RNA pull-down results delineated that H19 activated VEGFA expression by binding p300 to the VEGFA promoter and inducing histone acetylation of the VEGFA promoter. ESR1 and H19 were promising targets to predict peritoneal function. CONCLUSIONS High glucose-induced MMT of peritoneal mesothelial cells in peritoneal dialysis via activating ESR1. In peritoneal mesothelial cells, ESR1 transcribed the H19 and H19 binds to transcription cofactor p300 to activate the VEGFA. Targeting ESR1/H19/VEGFA pathway provided new hope for patients undergoing peritoneal dialysis.
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Affiliation(s)
- Tingting Zhao
- Department of Nephrology, First Affiliated Hospital of Naval Medical University, Shanghai Changhai Hospital, Shanghai, 200433, China
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200433, China
| | - Zhengyu Sun
- Department of Nephrology, First Affiliated Hospital of Naval Medical University, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Xueli Lai
- Department of Nephrology, First Affiliated Hospital of Naval Medical University, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Hongtao Lu
- Department of Nutrition, Naval Medical University, Shanghai, 200433, China
| | - Lulu Liu
- Department of Nephrology, First Affiliated Hospital of Naval Medical University, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Shuangxi Li
- Department of Nephrology, First Affiliated Hospital of Naval Medical University, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Ji-Hang Yuan
- Department of Medical Genetics, Naval Medical University, Shanghai, 200433, China.
| | - Zhiyong Guo
- Department of Nephrology, First Affiliated Hospital of Naval Medical University, Shanghai Changhai Hospital, Shanghai, 200433, China.
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Fu S, Zhang H, Li X, Zhang Q, Guo C, Qiu K, Feng J, Liu X, Liu D. Exosomes Derived from Human Amniotic Mesenchymal Stem Cells Facilitate Diabetic Wound Healing by Angiogenesis and Enrich Multiple lncRNAs. Tissue Eng Regen Med 2023; 20:295-308. [PMID: 36696086 PMCID: PMC10070558 DOI: 10.1007/s13770-022-00513-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/29/2022] [Accepted: 12/18/2022] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Diabetic wound healing remains a major challenge due to the impaired functionality of angiogenesis by persistent hyperglycemia. Mesenchymal stem cell exosomes are appropriate candidates for regulating the formation of angiogenesis in tissue repair and regeneration. Here, we explored the effects of exosomes derived from human amniotic mesenchymal stem cell (hAMSC-Exos) on the biological activities of human umbilical vein endothelial cells (HUVECs) treated with high glucose and on diabetic wound healing and investigate lncRNAs related to angiogenesis in hAMSC-Exos. METHODS hAMSCs and hAMSC-Exos were isolated and identified by flow cytometry or western blot. A series of functional assays such as cell counting kit-8, scratching, transwell and tube formation assays were performed to evaluate the potential effect of hAMSC-Exos on high glucose-treated HUVECs. The effect of hAMSC-Exos on diabetic wound healing were tested by measuring wound closure rates and immunohistochemical staining of CD31. Subsequently, the lncRNAs profiles in hAMSC-Exos and hAMSCs were examined to screen the lncRNAs related to angiogenesis. RESULTS The isolated hAMSC-Exos had a size range of 30-150 nm and were positive for CD9, CD63 and CD81. The hAMSC-Exos facilitate the functional properties of high glucose-treated HUVECs including the proliferation, migration and the angiogenic activities as well as wound closure and angiogenesis in diabetic wound. hAMSC-Exos were enriched lncRNAs that related to angiogenesis, including PANTR1, H19, OIP5-AS1 and NR2F1-AS1. CONCLUSION Our findings demonstrated hAMSC-Exos facilitate diabetic wound healing by angiogenesis and contain several exosomal lncRNAs related to angiogenesis, which may represent a promising strategy for diabetic wound healing.
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Affiliation(s)
- Shangfeng Fu
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Hongyan Zhang
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Xiancai Li
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Qiling Zhang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, People's Republic of China
| | - Chunyan Guo
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Keqing Qiu
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Junyun Feng
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Xiaoxiao Liu
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Dewu Liu
- Medical Center of Burn Plastic and Wound Repair, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang, 330006, Jiangxi, People's Republic of China.
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Wu W, Zhou J, Zhu D, Ma S. Effect of PKH-26-labeled exosomes derived from bone marrow mesenchymal stem cells on corneal epithelium regeneration in diabetic mice. ANNALS OF TRANSLATIONAL MEDICINE 2023; 11:167. [PMID: 36923078 PMCID: PMC10009570 DOI: 10.21037/atm-22-6644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/07/2023] [Indexed: 02/24/2023]
Abstract
Background It is known that bone marrow mesenchymal stem cells (BM-MSCs) could speed up the regeneration of diabetic corneal epithelium. To investigate the effect of exosomes derived from mouse BM-MSCs on corneal epithelium regeneration in diabetic mice. Methods Diabetic mouse models were established using streptozotocin (STZ), and their central corneal epithelium was scratched under a microscope. The diabetic mice were randomly divided into three groups: the control group was injected with subconjunctival phosphate buffer saline; the exosomes group was treated with a subconjunctival injection of exosomes derived from BM-MSCs; and the BM-MSCs group was treated with a subconjunctival injection of BM-MSCs. The corneal epithelium repair rates in the three groups were compared, and the distribution of the exosomes derived from BM-MSCs labeled with PKH-26 was observed by immunofluorescence. Hematoxylin-eosin staining of the corneal tissue was observed 72 h after the treatments in the three groups. Results The diabetic mice were successfully established by a blood glucose level >16.7 mmol/L after 8 weeks. The corneal epithelium healing rates in experimental groups 1 and 2 were significantly higher than those of the control group at 24, 48, and 72 h (P<0.05). However, there was no significant difference in the corneal epithelial healing rate between experimental groups 1 and 2 (P>0.05). The exosomes derived from BM-MSCs were found in the superficial corneal stroma in experimental groups 1 and 2, with the majority of the exosomes distributed in the limbal epithelium at the edge of the injury area. The proliferation of corneal epithelial cells in experimental groups 1 and 2 was more obvious than that in the control group. Conclusions The exosomes derived from BM-MSCs labeled with PKH-26 significantly promoted the repair of corneal epithelial injury in diabetic mice. These exosomes might be a substitute for BM-MSCs in the repair of diabetic keratopathy, suggesting a new idea for the repair of diabetic keratopathy with "cell-free" stem cell therapy, which will require a clinical study.
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Affiliation(s)
- Wei Wu
- Department of Ophthalmology, Guangzhou Red Cross Hospital of Jinan University, Guangzhou, China
| | - Jianting Zhou
- Department of Ophthalmology, Guangzhou Red Cross Hospital of Jinan University, Guangzhou, China
| | - Dan Zhu
- Department of Ophthalmology, Daping Hospital, Army Medical Center, Army Medical University, Chongqing, China
| | - Shengsheng Ma
- Department of Ophthalmology, Guangzhou Red Cross Hospital of Jinan University, Guangzhou, China
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Shirvaliloo M. LncRNA H19 promotes tumor angiogenesis in smokers by targeting anti-angiogenic miRNAs. Epigenomics 2023; 15:61-73. [PMID: 36802727 DOI: 10.2217/epi-2022-0145] [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: 02/22/2023] Open
Abstract
A key concept in drug discovery is the identification of candidate therapeutic targets such as long noncoding RNAs (lncRNAs) because of their extensive involvement in neoplasms, and impressionability by smoking. Induced by exposure to cigarette smoke, lncRNA H19 targets and inactivates miR-29, miR-30a, miR-107, miR-140, miR-148b, miR-199a and miR-200, which control the rate of angiogenesis by inhibiting BiP, DLL4, FGF7, HIF1A, HIF1B, HIF2A, PDGFB, PDGFRA, VEGFA, VEGFB, VEGFC, VEGFR1, VEGFR2 and VEGFR3. Nevertheless, these miRNAs are often dysregulated in bladder cancer, breast cancer, colorectal cancer, glioma, gastric adenocarcinoma, hepatocellular carcinoma, meningioma, non-small-cell lung carcinoma, oral squamous cell carcinoma, ovarian cancer, prostate adenocarcinoma and renal cell carcinoma. As such, the present perspective article seeks to establish an evidence-based hypothetical model of how a smoking-related lncRNA known as H19 might aggravate angiogenesis by interfering with miRNAs that would otherwise regulate angiogenesis in a nonsmoking individual.
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Affiliation(s)
- Milad Shirvaliloo
- Infectious & Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, 15731, Iran.,Future Science Group, Unitec House, 2 Albert Place, London, N3 1QB, UK
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Feng Y, Lu J, Peng X, Ge Y, Zhang R, Li H. Long noncoding RNA uc007nnj.1 mediates neuronal death induced by retinal ischemia/reperfusion in mice via the miR-155-5p/Tle4 axis. Mol Med 2023; 29:9. [PMID: 36653745 PMCID: PMC9850566 DOI: 10.1186/s10020-022-00591-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 12/13/2022] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Retinal ganglion cells (RGCs) apoptosis is a vital manifestation of retinal ischemia/reperfusion (I/R) injury, yet the underlying mechanisms are not well understood. The contribution of long noncoding RNAs (lncRNAs) to this cellular process is currently being explored. Based on a lncRNA chip assay, we aimed to investigate the role of lncRNA uc007nnj.1 in the pathological process of ischemia-induced RGCs apoptosis. METHODS Hank's balanced salt solution containing 10 µM antimycin A and 2 µM calcium ionophore for 2 h to construct an ischemic model in RGCs, and elevation of intraocular pressure to 120 mm Hg for 1 h was used to construct a mouse model of retinal I/R injury. RESULTS In this study, lncRNA uc007nnj.1 was highly upregulated in response to I/R injury in RGCs and mouse retinas. In addition, lncRNA uc007nnj.1 knockdown reduced retinal neuronal cell apoptosis in vitro and in vivo and significantly improved retinal function. DISCUSSION Mechanistically, the results demonstrated that lncRNA uc007nnj.1 acts as ceRNA competitively binding miR-155-5p, thereby enhancing the expression levels of Tle4, thus aggravating ischemia-related apoptosis in RGCs. CONCLUSIONS Finally, our study identifies the lncRNA uc007nnj.1/miR-155-5p/Tle4 axis as a potential target for the prevention of I/R-induced retinal neuronal death.
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Affiliation(s)
- Yuqing Feng
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Jinfang Lu
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Xujun Peng
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Yanni Ge
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Ran Zhang
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
| | - Huiling Li
- grid.452708.c0000 0004 1803 0208Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China ,grid.452708.c0000 0004 1803 0208Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan China
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Hu Q, Zhang X, Sun M, jiang B, Zhang Z, Sun D. Potential epigenetic molecular regulatory networks in ocular neovascularization. Front Genet 2022; 13:970224. [PMID: 36118885 PMCID: PMC9478661 DOI: 10.3389/fgene.2022.970224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/02/2022] [Indexed: 11/23/2022] Open
Abstract
Neovascularization is one of the many manifestations of ocular diseases, including corneal injury and vascular diseases of the retina and choroid. Although anti-VEGF drugs have been used to effectively treat neovascularization, long-term use of anti-angiogenic factors can cause a variety of neurological and developmental side effects. As a result, better drugs to treat ocular neovascularization are urgently required. There is mounting evidence that epigenetic regulation is important in ocular neovascularization. DNA methylation and histone modification, non-coding RNA, and mRNA modification are all examples of epigenetic mechanisms. In order to shed new light on epigenetic therapeutics in ocular neovascularization, this review focuses on recent advances in the epigenetic control of ocular neovascularization as well as discusses these new mechanisms.
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Song F, Chen Z, Lyu D, Gu Y, Lu B, Hao S, Xu Y, Jin X, Fu Q, Yao K. Expression profiles of long noncoding RNAs in human corneal epithelial cells exposed to fine particulate matter. CHEMOSPHERE 2022; 287:131955. [PMID: 34478962 DOI: 10.1016/j.chemosphere.2021.131955] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/06/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
PURPOSE The aim of this study was to investigate the expression profiles of long noncoding RNAs (lncRNAs) in human corneal epithelial cells (HCECs) exposed to fine particulate matter (PM2.5) and to identify potential biological pathways involved in PM2.5-induced toxicity in HCECs. METHODS Using RNA sequencing (RNA-seq) and hierarchy clustering analysis, lncRNA expression profiles in PM2.5-treated and untreated HCECs were examined. Gene ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed to predict the role of altered lncRNAs in biological processes and pathways. A quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) assay was conducted to verify the RNA-seq results in HCECs and human corneal epithelial cell sheets. RESULTS In total, 65 lncRNAs were altered in the PM2.5-treated HCECs, including 41 upregulated and 24 downregulated lncRNAs. The results of the qRT-PCR assay were consistent with those of the RNA-seq analysis. The expression of two significantly upregulated lncRNAs was confirmed in human corneal epithelial cell sheets. The GO analysis demonstrated that altered lncRNAs in the PM2.5-treated HCECs were significantly enriched in three domains: cellular component, molecular function, and biological process. The KEGG pathway analysis revealed enriched pathways of lncRNA co-expressed mRNAs, including cancer, RNA transport, and Rap1 signaling. CONCLUSIONS Our results suggest that lncRNAs are involved in the pathogenesis of PM2.5-induced ocular diseases, exerting their effects through biological processes and pathogenic pathways. Among the altered lncRNAs, RP3-406P24.3 and RP11-285E9.5 may play significant roles in PM2.5-induced ocular surface injury.
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Affiliation(s)
- Fan Song
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Zhijian Chen
- Department of Environmental and Occupational Health, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang Province, China
| | - Danni Lyu
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Yuzhou Gu
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Bing Lu
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Shengjie Hao
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Yili Xu
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Xiuming Jin
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Qiuli Fu
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China.
| | - Ke Yao
- Eye Center of the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China.
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Wu B, Tang X, Zhou Z, Ke H, Tang S, Ke R. RNA sequencing analysis of FGF2-responsive transcriptome in skin fibroblasts. PeerJ 2021; 9:e10671. [PMID: 33520460 PMCID: PMC7812929 DOI: 10.7717/peerj.10671] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 12/08/2020] [Indexed: 01/01/2023] Open
Abstract
Background Fibroblast growth factor 2 (FGF2) is a highly pleiotropic cytokine with antifibrotic activity in wound healing. During the process of wound healing and fibrosis, fibroblasts are the key players. Although accumulating evidence has suggested the antagonistic effects of FGF2 in the activation process of fibroblasts, the mechanisms by which FGF2 hinders the fibroblast activation remains incompletely understood. This study aimed to identify the key genes and their regulatory networks in skin fibroblasts treated with FGF2. Methods RNA-seq was performed to identify the differentially expressed mRNA (DEGs) and lncRNA between FGF2-treated fibroblasts and control. DEGs were analyzed by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). Furthermore, the networks between mRNAs and lncRNAs were constructed by Pearson correlation analysis and the networkanalyst website. Finally, hub genes were validated by real time-PCR. Results Between FGF2-treated fibroblasts and control fibroblasts, a total of 1475 DEGs was obtained. These DEGs were mainly enriched in functions such as the ECM organization, cell adhesion, and cell migration. They were mainly involved in ECM-receptor interaction, PI3K-Akt signaling, and the Hippo pathway. The hub DEGs included COL3A1, COL4A1, LOX, PDGFA, TGFBI, and ITGA10. Subsequent real-time PCR, as well as bioinformatics analysis, consistently demonstrated that the expression of ITGA10 was significantly upregulated while the other five DEGs (COL3A1, COL4A1, LOX, PDGFA, TGFBI) were downregulated in FGF2-treated fibroblasts. Meanwhile, 213 differentially expressed lncRNAs were identified and three key lncRNAs (HOXA-AS2, H19, and SNHG8) were highlighted in FGF2-treated fibroblasts. Conclusion The current study comprehensively analyzed the FGF2-responsive transcriptional profile and provided candidate mechanisms that may account for FGF2-mediated wound healing.
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Affiliation(s)
- Baojin Wu
- Department of Plastic Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Xinjie Tang
- Department of Plastic Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Zhaoping Zhou
- Department of Plastic Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Honglin Ke
- Department of Emergency, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Shao Tang
- Department of Statistics, Florida State University, Tallahassee, FL, USA
| | - Ronghu Ke
- Department of Plastic Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai, China
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11
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CTRP3 Activates the AMPK/SIRT1-PGC-1α Pathway to Protect Mitochondrial Biogenesis and Functions in Cerebral Ischemic Stroke. Neurochem Res 2020; 45:3045-3058. [DOI: 10.1007/s11064-020-03152-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/09/2020] [Accepted: 10/14/2020] [Indexed: 02/06/2023]
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12
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Shi X, Wei YT, Li H, Jiang T, Zheng XL, Yin K, Zhao GJ. Long non-coding RNA H19 in atherosclerosis: what role? Mol Med 2020; 26:72. [PMID: 32698876 PMCID: PMC7374855 DOI: 10.1186/s10020-020-00196-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 07/07/2020] [Indexed: 12/14/2022] Open
Abstract
Atherosclerosis (AS) is widely accepted to be a multistep pathophysiological process associated with several other processes such as angiogenesis and inflammatory response. Long non-coding RNAs (lncRNAs) are non-protein coding RNAs (more than 200 nucleotides in length) and can regulate gene expression at the transcriptional and post-transcriptional levels. Recent studies suggest that lncRNA-H19 plays important roles in the regulation of angiogenesis, adipocyte differentiation, lipid metabolism, inflammatory response, cellular proliferation and apoptosis. In this review, we primarily discuss the roles of lncRNA-H19 in atherosclerosis-related pathophysiological processes and the potential mechanisms by which lncRNA-H19 regulates the development of atherosclerosis, to help provide a better understanding of the biological functions of lncRNA-H19 in atherosclerosis.
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Affiliation(s)
- Xian Shi
- School of Medicine, Guilin Medical University, Guilin, 541100, Guangxi, China
| | - Ya-Ting Wei
- School of Medicine, Guilin Medical University, Guilin, 541100, Guangxi, China
| | - Heng Li
- Institute of Cardiovascular Research, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang, 421001, Hunan, China
| | - Ting Jiang
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan City People's Hospital, Qingyuan, 511518, Guangdong, China
| | - Xi-Long Zheng
- Department of Biochemistry and Molecular Biology, The Libin Cardiovascular Institute of Alberta, The University of Calgary, Health Sciences Center, Calgary, AB, Canada.,Key Laboratory of Molecular Targets and Clinical Pharmacology, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, Guangdong, China
| | - Kai Yin
- Center for Diabetic Systems Medicine, Guangxi Key Laboratory of Excellence, The Second Affiliated Hospital of Guilin Medical University, Guilin, 541100, Guangxi, China.
| | - Guo-Jun Zhao
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan City People's Hospital, Qingyuan, 511518, Guangdong, China.
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13
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Zhang P, Lu B, Xu F, Wang C, Zhang R, Liu Y, Wei C, Mei L. Analysis of Long Noncoding RNAs in Choroid Neovascularization. Curr Eye Res 2020; 45:1403-1414. [PMID: 32316788 DOI: 10.1080/02713683.2020.1748659] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Purpose: Choroidal neovascularization (CNV) is the major pathological features of wet age-related macular degeneration (AMD). Long noncoding RNAs play great roles in numerous biological processes. The purpose of the study was to investigate the expression profile and possible functions of the lncRNAs in CNV. Methods: In this study, the mice CNV model were conducted by laser photocoagulation. The expression profiles of lncRNAs were accessed by microarray analysis. Selected altered lncRNAs of mice CNV and wet AMD patients were validated by RT-PCR. Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and lncRNA-mRNA coexpression network were conducted to reveal the biological functions. Results: The results revealed that 128 lncRNAs were significantly altered in RPE-choroid-sclera complexes of CNV mice (P < .05, fold change > 2.0). GO analysis revealed that the altered target genes of the selected lncRNAs most enriched in angiogenesis. KEGG pathway analysis demonstrated that altered target genes of lncRNAs most enriched in focal adhesion signaling pathway. H19 was significantly increased in the aqueous humor of wet AMD patients. Moreover, Inhibition of lncRNA H19 could suppresses M2 macrophage gene expression of laser-induced CNV mice. Conclusions: Our study identified differential expressions of lncRNAs in CNV, and lncRNA H19 might be novel potential target for the prevention and treatment of CNV.
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Affiliation(s)
- Pengfei Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China.,Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College , Wuhu, China
| | - Bing Lu
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University, School of Medicine , Shanghai, China
| | - Fengyuan Xu
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China
| | - Chen Wang
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China
| | - Rongrong Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China
| | - Yinping Liu
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China
| | - Chenghua Wei
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China
| | - Lixin Mei
- Department of Ophthalmology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College) , Wuhu, China.,Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution, Wannan Medical College , Wuhu, China
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14
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He M, Wang W, Yu H, Wang D, Cao D, Zeng Y, Wu Q, Zhong P, Cheng Z, Hu Y, Zhang L. Comparison of expression profiling of circular RNAs in vitreous humour between diabetic retinopathy and non-diabetes mellitus patients. Acta Diabetol 2020; 57:479-489. [PMID: 31749049 DOI: 10.1007/s00592-019-01448-w] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/30/2019] [Indexed: 02/06/2023]
Abstract
AIMS To compare circular (circRNA) expression levels in the vitreous humour between PDR (proliferative diabetic retinopathy) and the control groups. METHODS The present study collected vitreous humour samples of both the PDR group and the control group (composed of rhegmatogenous retinal detachment, idiopathic macular hole and idiopathic macular epiretinal membrane). All the samples were subjected to circRNA and mRNA sequencing as well as bioinformatic analysis. RESULTS The vitreous humour of the PDR and control groups was collected during PPV surgery. Compared to the control group, 122 upregulated and 9 downregulated circRNAs, and 818 upregulated mRNAs and 864 downregulated mRNAs were identified. We further selected 12 circRNAs to validate the RNA expression level by qPCR; results showed that with the exception of 2 downregulated circRNAs the remaining were significantly upregulated in the PDR group, which was consistent with RNA sequencing results. Bioinformatic analysis was conducted to predict possible miRNAs absorbed by circRNAs. Each circRNA could interact with at least five miRNAs. We randomly chose three miRNAs to test the expression level in the vitreous humour by qPCR and found these miRNAs were significantly downregulated in the PDR group. CONCLUSIONS The changed profiling of circRNAs in the vitreous humour was reliable and may become a promising biomarker of DR and the circRNA-miRNA-mRNA network. It may also play an important role in the progression of DR.
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Affiliation(s)
- Miao He
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Wei Wang
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-Sen University, Guangzhou, China
| | - Honghua Yu
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Decai Wang
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-Sen University, Guangzhou, China
| | - Dan Cao
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Yunkao Zeng
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
- Shantou University Medical College, Shantou, China
| | - Qiaowei Wu
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
- Southern Medical University, Guangzhou, China
| | - Pingting Zhong
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
- Shantou University Medical College, Shantou, China
| | - Zhixing Cheng
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Yunyan Hu
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Liang Zhang
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China.
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15
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Role of Endogenous Regulators of Hem- And Lymphangiogenesis in Corneal Transplantation. J Clin Med 2020; 9:jcm9020479. [PMID: 32050484 PMCID: PMC7073692 DOI: 10.3390/jcm9020479] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/03/2020] [Accepted: 02/07/2020] [Indexed: 12/11/2022] Open
Abstract
Under normal conditions, the cornea, being the transparent “windscreen” of the eye, is free of both blood and lymphatic vessels. However, various diseases of the eye, like infections, can interfere with the balance between promoting and inhibiting factors, which leads to ingrowth of blood and lymphatic vessels. The newly formed lymphatic vessels increase the risk of graft rejection after subsequent corneal transplantation. Corneal transplantation is one of the most commonly performed transplantations worldwide, with more than 40,000 surgeries per year in Europe. To date, various anti-hem- and anti-lymphangiogenic treatment strategies have been developed specifically for the corneal vascular endothelial growth factor (VEGF) pathway. Currently, however, no treatment strategies are clinically available to specifically modulate lymphangiogenesis. In this review, we will give an overview about endogenous regulators of hem- and lymphangiogenesis and discuss potential new strategies for targeting pathological lymphangiogenesis. Furthermore, we will review recently identified modulators and demonstrate that the cornea is a suitable model for the identification of novel endogenous modulators of lymphangiogenesis. The identification of novel modulators of lymphangiogenesis and a better understanding of the signaling pathways involved will contribute to the development of new therapeutic targets for the treatment of pathological lymphangiogenesis. This, in turn, will improve graft rejection, not only for the cornea.
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16
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Li J, Cao LT, Liu HH, Yin XD, Wang J. Long non coding RNA H19: An emerging therapeutic target in fibrosing diseases. Autoimmunity 2019; 53:1-7. [PMID: 31646913 DOI: 10.1080/08916934.2019.1681983] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fibrosis is characterised by excessive deposition of the extracellular matrix (ECM) and develops because of fibroblast differentiation during the process of inflammation. There are few effective treatment options for this diseases due to the aetiology of fibrosis is not completely clarified. Long non-coding RNAs (lncRNAs), a type of ncRNA with a length of greater than 200 nucleotides without evident protein coding function, are important regulators of most biological and pathological processes, including participation, regulation or mediation of disease development. Among them, H19 is recently discovered as a class of lncRNAs which is related to fibrotic disease and inflammation. These observations implied a potential role for H19 as a promising therapeutic targets for treatment of fibrotic diseases. In this review, we will describe the characteristics of H19 and summarise recent advances in the mechanisms of H19 in the process of fibrosis. Finally, we will succinctly discuss the recent progress of the involvement of H19 in the development and pathogenesis of fibrosis diseases.
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Affiliation(s)
- Juan Li
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China
| | - Long-Ting Cao
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China
| | - Hong-Hui Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China
| | - Xiao-Dong Yin
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China
| | - Jing Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China
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17
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Diabetic Retinopathy, lncRNAs, and Inflammation: A Dynamic, Interconnected Network. J Clin Med 2019; 8:jcm8071033. [PMID: 31337130 PMCID: PMC6678747 DOI: 10.3390/jcm8071033] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/03/2019] [Accepted: 07/09/2019] [Indexed: 02/06/2023] Open
Abstract
Diabetic retinopathy (DR) is reaching epidemic levels globally due to the increase in prevalence of diabetes mellitus (DM). DR also has detrimental effects to quality of life, as it is the leading cause of blindness in the working-age population and the most common cause of vision loss in individuals with DM. Over several decades, many studies have recognized the role of inflammation in the development and progression of DR; however, in recent years, accumulating evidence has also suggested that non-coding RNAs, especially long non-coding (lncRNAs), are aberrantly expressed in diabetes and may play a putative role in the development and progression of DR through the modulation of gene expression at the transcriptional, post-transcriptional, or epigenetic level. In this review, we will first highlight some of the key inflammatory mediators and transcription factors involved in DR, and we will then introduce the critical roles of lncRNAs in DR and inflammation. Following this, we will discuss the implications of lncRNAs in other epigenetic mechanisms that may also contribute to the progression of inflammation in DR.
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