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Cao X, Jiang Z, Bu X, Li Q, Tian Y, Xu Z, Zhang B, Yuan X. MicroRNA-204-5p Attenuates Oxidative Stress, Apoptosis and Inflammation by Targeting TXNIP in Diabetic Cataract. Biochem Genet 2024:10.1007/s10528-024-10863-w. [PMID: 38896379 DOI: 10.1007/s10528-024-10863-w] [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: 02/03/2024] [Accepted: 06/06/2024] [Indexed: 06/21/2024]
Abstract
Diabetic cataract (DC) is a major cause of blindness in diabetic patients and it is characterized by early onset and rapid progression. MiR-204-5p was previously identified as one of the top five down-regulated miRNAs in human DC lens tissues. We aimed to determine the expression of miR-204-5p in human lens epithelial cells (HLECs) and explore its effects and mechanisms in regulating the progression of DC. The expression of miR-204-5p in the anterior capsules of DC patients and HLECs was examined by RT-qPCR. Bioinformatics tools were then used to identify the potential target of miR-204-5p. The relationship between miR-204-5p and the target gene was confirmed through a dual luciferase reporter assay. Additionally, the regulatory mechanism of oxidative stress, apoptosis, and inflammation in DC was investigated by overexpressing miR-204-5p using miR-204-5p agomir. The expression of miR-204-5p was downregulated in the anterior capsules of DC patients and HLECs. Overexpression of miR-204-5p reduced ROS levels, pro-apoptosis genes (Bid, Bax, caspase-3), and IL-1β production in HG-treated HLECs. TXNIP was the direct target of miR-204-5p by dual luciferase reporter assay. Therefore, this study demonstrated that miR-204-5p effectively reduced oxidative damage, apoptosis, and inflammation in HLECs under HG conditions by targeting TXNIP. Targeting miR-204-5p could be a promising therapeutic strategy for the potential treatment of DC.
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Affiliation(s)
- Xiang Cao
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
- Department of Ophthalmology, Affiliated People's Hospital, Jiangsu University, Zhenjiang, Jiangsu, 212002, China
| | - Zhixin Jiang
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
| | - Xiaofei Bu
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
| | - Qingyu Li
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
| | - Ye Tian
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
| | - Zijiao Xu
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Boyang Zhang
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Xiaoyong Yuan
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology, Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, 300020, China.
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Lamas M. Epigenetic mechanisms of non-retinal components of the aging eye and novel therapeutic strategies. Exp Eye Res 2023; 236:109673. [PMID: 37802281 DOI: 10.1016/j.exer.2023.109673] [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: 06/29/2023] [Revised: 09/25/2023] [Accepted: 10/02/2023] [Indexed: 10/08/2023]
Abstract
The eye is a complex organ composed of various cell types, each serving a unique purpose. However, aging brings about structural and functional changes in these cells, leading to discomfort and potential pathology. Alterations in gene expression, influenced by aging and environmental factors, significantly affect cell structure and function. Epigenetics, a field focused on understanding the correlation between changes in gene expression, cell function, and environmental factors, plays a crucial role in unraveling the molecular events responsible for age-related eye changes. This prompts the possibility of developing epigenetic strategies to intervene in these changes or reinstate proper molecular activities. Indeed, research has demonstrated that epigenetic modifications, including DNA methylation, histone modification, and non-coding RNAs, are closely associated with age-related alterations in gene expression and cell function. This review aims to compile and synthesize the most recent body of evidence supporting the role of epigenetics in age-related alterations observed in various components of the eye. Specifically, it focuses on the impact of epigenetic changes in the ocular surface, tear film, aqueous humor, vitreous humor, and lens. Furthermore, it highlights the significant advancements that have been made in the field of epigenetic-based experimental therapies, specifically focusing on their potential for treating pathological conditions in the aging eye.
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Affiliation(s)
- Monica Lamas
- Departamento de Farmacobiología, CINVESTAV-Sede Sur, Centro de Investigación sobre el Envejecimiento, CINVESTAV Sede Sur, Calzada de los Tenorios 235, CDMX, Mexico.
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Shaohua H, Yihui W, Kaier Z, Ying B, Xiaoyi W, Hui Z, Guohu D, Peng C. Aquaporin 5 maintains lens transparency by regulating the lysosomal pathway using circRNA. J Cell Mol Med 2023; 27:803-818. [PMID: 36824022 PMCID: PMC10002928 DOI: 10.1111/jcmm.17679] [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: 09/14/2022] [Revised: 01/01/2023] [Accepted: 01/06/2023] [Indexed: 02/25/2023] Open
Abstract
The lens is transparent, non-vascular, elastic and wrapped in a transparent capsule. The lens oppacity of AQP5-/- mice was increased more than that of wild-type (AQP5+/+ ) mice. In this study, we explored the potential functional role of circular RNAs (circRNAs) and transcription factor HSF4 in lens opacity in aquaporin 5 (AQP5) knockout (AQP5-/- ) mice. Autophagy was impaired in the lens tissues of AQP5-/- mice. Autophagic lysosomes in lens epithelial cells of AQP5-/- mice were increased compared with AQP5+/+ mice, based on analysis by transmission electron microscopy. The genetic information of the mice lens was obtained by high-throughput sequencing, and then the downstream genes were analysed. A circRNA-miRNA-mRNA network related to lysosomal pathway was constructed by the bioinformatics analysis of the differentially expressed circRNAs. Based on the prediction of the TargetScan website and the validation by dual luciferase reporter assay and RNA immunoprecipitation-qPCR, we found that circRNA (Chr16: 33421321-33468183+) inhibited the function of HSF4 by sponging microRNA (miR-149-5p), and it downregulated the normal expression of lysosome-related mRNAs. The accumulation of autophagic lysosome may be one of the reasons for the abnormal development of the lens in AQP5-/- mice.
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Affiliation(s)
- Hu Shaohua
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Wang Yihui
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Zhang Kaier
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Bai Ying
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Wang Xiaoyi
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Zhao Hui
- The 971 Hospital of the Chinese People's Liberation Army Navy, Qingdao, China
| | - Di Guohu
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Chen Peng
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, China.,Institute of Stem Cell Regeneration Medicine, School of Basic Medicine, Qingdao University, Qingdao, China
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Liu T, Zhao L, Yan D, Wang N. Circ_0060,144 inhibits the occurrence and development of age-related cataract via the miR-23b-3p/HIPK3 axis. Exp Eye Res 2022; 222:109179. [PMID: 35810770 DOI: 10.1016/j.exer.2022.109179] [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: 03/14/2022] [Revised: 06/01/2022] [Accepted: 07/02/2022] [Indexed: 11/18/2022]
Abstract
Age-related cataract (ARC) is a common eye disease that occurs mostly in the elderly. Emerging evidence suggests that circular RNA (circRNA) plays an important role in disease development. However, there are few reports about the role of circRNA in cataract. Here, we investigated the function of circ_0060,144 in ARC. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to measure the expression of circ_0060,144, miR-23b-3p, and homeodomain interacting protein kinase 3 (HIPK3) mRNA. CCK-8 and flow cytometry analysis of cell proliferation and apoptosis. Western blot was performed to measure protein-associated proliferation and apoptosis. ELISA was used to detect cellular MDA and GSH-Px levels. Dual-luciferase reporter, RNA immunoprecipitation (RIP), and RNA pull-down assays were used to investigate the association between miR-23b-3p and circ_0060,144 or HIPK3. Circ_0060,144 and HIPK3 mRNA expression were decreased in ARC tissues, and miR-23b-3p was increased. Circ_0060,144 overexpression promoted proliferation and inhibited apoptosis of SRA01/04 cells. And proliferation-related and apoptosis-related proteins also confirmed this conclusion. In addition, circ_0060,144 overexpression reduced MDA level and increased GSH-Px level. In terms of mechanism, circ_0060,144 inhibited HIPK3 expression via sponging miR-23b-3p. Circ_0060,144 promoted ARC development via regulation of miR-23b-3p/HIPK3 axis.
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Affiliation(s)
- Tao Liu
- Ophthalmology Department, Baoji Central Hospital, Baoji, Shaanxi, China
| | - Liping Zhao
- Ophthalmology Department, Baoji Central Hospital, Baoji, Shaanxi, China
| | - Dan Yan
- Ophthalmology Department, Baoji Central Hospital, Baoji, Shaanxi, China
| | - Na Wang
- Ophthalmology Department, Baoji Central Hospital, Baoji, Shaanxi, China.
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An Ex Vivo Study on Release, Uptake, and miRNA Profile of Exosomes in Rat Lens. J Ophthalmol 2022; 2022:6706172. [PMID: 35496773 PMCID: PMC9050248 DOI: 10.1155/2022/6706172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 03/14/2022] [Accepted: 04/06/2022] [Indexed: 11/17/2022] Open
Abstract
Purpose To identify the ability of releasing and uptaking exosomes in rat lens and characterize the exosomal microRNA profile of lens-derived exosomes. Methods The rat lenses were cultured ex vivo and the medium was collected. The exosomes were isolated from medium and measured in size and concentration by nanoflow cytometry (nFCM) and transmission electron microscopy (TEM) and verified with CD63 and TSG101 by Western blot. The miRNAs in exosomes released from lens epithelial cells (LECs) were sequenced. The plasma exosomes labeled by PKH26 were used to verify the exosomes uptake LECs, and their colocalized fluorescence was imaged by confocal microscopy. Results LECs released numerous exosomes into the medium through the capsule, which contained abundant miRNAs. The most abundant miRNAs included miR-184, let-7c-5p, let-7a-5p, let-7b-5p, let-7f-5p, miR-125a-5p, miR-204-5p, miR-125b-5p, miR-1b, and miR-23a-3p. The LECs but not the lens fibre cells showed exosome uptake. The LECs uptake more PKH26-labeled exosomes at day 7 than day 3 and day 14. Conclusions Our results suggested that LECs can release and uptake exosomes through the capsule. Exosomes may be an important way for the lens to communicate among LECs, aqueous humour, vitreous body, and other ocular tissues.
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Bereimipour A, Najafi H, Mirsane ES, Moradi S, Satarian L. Roles of miR-204 in retinal development and maintenance. Exp Cell Res 2021; 406:112737. [PMID: 34324864 DOI: 10.1016/j.yexcr.2021.112737] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 12/14/2022]
Abstract
The retina is the innermost part of the eye of most vertebrates and it is essential for vision. The development, maintenance, and function of this laminated structure is tightly regulated by numerous genes. Deficiencies in the expression of these genes as well as deregulation of various molecular mechanisms can cause retinopathies and blindness. MicroRNAs (miRNAs) are one of the most important and effective molecular regulatory mechanisms that underlie the biology of the retina. miRNAs have specific functional roles in the development and maintenance of different retinal layers and retinal cell types. While previous studies have reported a large number of miRNAs linked to development, maintenance and diseases of the retina, no comprehensive study has properly discussed and integrated data from these studies. Given the particular importance of miR-204 in retinal biology, we intend to critically discuss the expression and functional significance of this miRNA in the development, maintenance, and pathologies of the retina. Moreover, we explore biological processes through which miR-204 influences retinal pathophysiology. This review highlights the crucial functions of miR-204 in the retina and suggests the putative mechanism of miR-204 action in retinal biology.
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Affiliation(s)
- Ahmad Bereimipour
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Faculty of Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran
| | - Hadi Najafi
- Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Elahe Sadat Mirsane
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Sharif Moradi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
| | - Leila Satarian
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
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Tang S, Di G, Hu S, Liu Y, Dai Y, Chen P. AQP5 regulates vimentin expression via miR-124-3p.1 to protect lens transparency. Exp Eye Res 2021; 205:108485. [PMID: 33582182 DOI: 10.1016/j.exer.2021.108485] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 12/18/2022]
Abstract
The pathogenesis of congenital cataract (CC), a major disease associated with blindness in infants, is complex and diverse. Aquaporin 5 (AQP5) represents an essential membrane water channel. In the present study, whole exome sequencing revealed a novel heterozygous missense mutation of AQP5 (c.152 T > C, p. L51P) in the four generations of the autosomal dominant CC (adCC) family. By constructing a mouse model of AQP5 knockout (KO) using the CRISPR/Cas9 technology, we observed that the lens of AQP5-KO mice showed mild opacity at approximately six months of age. miR-124-3p.1 expression was identified to be downregulated in the lens of AQP5-KO mice as evidenced by qRT-PCR analysis. A dual luciferase reporter assay confirmed that vimentin was a target gene of miR-124-3p.1. Organ-cultured AQP5-KO mouse lenses were showed increased opacity compared to those of WT mice, and vimentin expression was upregulated as determined by RT-PCR, western blotting, and immunofluorescence staining. After miR-124-3p.1 agomir was added, the lens opacity in WT mice and AQP5-KO mice decreased, accompanied by the downregulation of vimentin. AQP5-L51P increased vimentin expression of in human lens epithelial cells. Therefore, a missense mutation in AQP5 (c.152 T > C, p. L51P) was associated with adCC, and AQP5 could participate in the maintenance of lens transparency by regulating vimentin expression via miR-124-3p.1.
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Affiliation(s)
- Suzhen Tang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Guohu Di
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China; Institute of Stem Cell Regeneration Medicine, School of Basic Medicine, Qingdao University, Qingdao, 266071, China
| | - Shaohua Hu
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Yaning Liu
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Yunhai Dai
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China.
| | - Peng Chen
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, 266071, Shandong Province, China; Institute of Stem Cell Regeneration Medicine, School of Basic Medicine, Qingdao University, Qingdao, 266071, China.
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Liu X, Gong Q, Yang L, Liu M, Niu L, Wang L. microRNA-199a-5p regulates epithelial-to-mesenchymal transition in diabetic cataract by targeting SP1 gene. Mol Med 2020; 26:122. [PMID: 33276722 PMCID: PMC7718685 DOI: 10.1186/s10020-020-00250-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 11/26/2020] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND As a common ocular complication of diabetes mellitus, diabetic cataract is becoming a leading cause of visual impairment. The progression of diabetic cataract progression involves epithelial-to-mesenchymal transition (EMT), the precise role of which remains to be investigated. As microRNAs (miRNAs) are suggested to be involved in the pathogenesis of many diseases, identification of aberrantly expressed miRNAs in diabetic lens epithelial cells (LECs) and their targets may provide insights into our understanding of diabetic cataract and potential therapeutic targets. METHODS Diabetic cataract capsules and LECs exposed to high glucose (25 mmol/L, 1-5 days) were used to mimic the model. Quantitative RT-PCR was performed to evaluate the differential expression of miRNA. Dual luciferase reporter assay was used to identify the binding target of miR-199a-5p. The expression of EMT-associated proteins was determined by immunofluorescence and Western blot analysis. RESULTS Our results showed the differential expression of miR-9, -16, -22, -199a and -204. MiR-199a was downregulated in diabetic cataract capsule and hyperglycemia-conditioned human LECs. Specific protein 1 could be directly targeted and regulated by miR-199a in LECs and inhibit EMT in diabetic LECs. CONCLUSION Our findings implied miR-199a could be a therapeutic target by regulating SP1 directly to affect EMT in diabetic cataract and provided novel insights into the pathogenesis of diabetic cataract.
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Affiliation(s)
- Xin Liu
- Eye Center, The Second Hospital of Jilin University, #218 Ziqiang Street, Changchun, Jilin, China
| | - Qiaoyun Gong
- Eye Center, The Second Hospital of Jilin University, #218 Ziqiang Street, Changchun, Jilin, China
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiaotong University Medical School, #100 Haining Road, Shanghai, China
| | - Longfei Yang
- Jilin Provincial Key Laboratory On Molecular and Chemical Genetics, The Second Hospital of Jilin University, #218 Ziqiang Street, Changchun, Jilin, China
| | - Min Liu
- Eye Center, The Second Hospital of Jilin University, #218 Ziqiang Street, Changchun, Jilin, China
| | - Lingzhi Niu
- Eye Center, The Second Hospital of Jilin University, #218 Ziqiang Street, Changchun, Jilin, China
| | - Lufei Wang
- Eye Center, The Second Hospital of Jilin University, #218 Ziqiang Street, Changchun, Jilin, China.
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Liang S, Dou S, Li W, Huang Y. Profiling of circular RNAs in age-related cataract reveals circZNF292 as an antioxidant by sponging miR-23b-3p. Aging (Albany NY) 2020; 12:17271-17287. [PMID: 32913142 PMCID: PMC7521481 DOI: 10.18632/aging.103683] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 06/29/2020] [Indexed: 01/24/2023]
Abstract
Age-related cataract (ARC) is one of the major causes of visual impairment and reversible blindness worldwide. Accumulating evidence has revealed that circular RNAs (circRNAs) are involved in multiple regulatory processes in various ocular diseases. However, the expression profile, regulatory roles, and underlying mechanisms of circRNAs in ARC remain largely unknown. Herein we deep-sequenced circRNAs of anterior lens capsules from normal and ARC lenses, and detected 23,787 candidate circRNAs. Of these, 466 were significantly differentially expressed, and a higher correlation in down-regulated circRNAs between ARC and diabetic cataract was observed compared with up-regulated ones. Subsequent bioinformatics analysis disclosed that certain differentially expressed circRNAs participated in oxidative stress and apoptosis-related signaling pathways in ARC. Notably, the level of circZNF292 was significantly decreased, while miR-23b-3p was significantly increased in ARC. The target region prediction and dual-luciferase reporter assays proved that circZNF292 acted as a competitive endogenous RNA to regulate the expression of anti-oxidative genes through competing with miR-23b-3p. Our results indicate that circZNF292, a down-regulated circRNA in the anterior lens capsule of ARC patients, may be involved in resistance to oxidative damage and apoptosis of lens epithelial cells by sponging miR-23b-3p, providing a potential target for prevention and treatment of ARC.
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Affiliation(s)
- Shuqi Liang
- Medical College of Qingdao University, Qingdao, China,State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Qingdao, China
| | - Shengqian Dou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Qingdao, China,Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
| | - Wenfeng Li
- Department of Medical Oncology, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yusen Huang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Qingdao, China,Qingdao Eye Hospital of Shandong First Medical University, Qingdao, China
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Fransquet PD, Lacaze P, Saffery R, Phung J, Parker E, Shah R, Murray A, Woods RL, Ryan J. Blood DNA methylation signatures to detect dementia prior to overt clinical symptoms. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2020; 12:e12056. [PMID: 32671182 PMCID: PMC7346866 DOI: 10.1002/dad2.12056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/27/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022]
Abstract
INTRODUCTION This study determined whether blood DNA methylation (DNAm) patterns differentiate individuals with presymptomatic dementia compared to controls. METHODS DNAm was measured in 73 individuals prior to dementia diagnosis and 87 cognitively healthy controls matched for age, sex, smoking, education, and baseline cognition. DNAm was also measured at 3 years follow-up in 25 dementia cases, and 24 controls. RESULTS Cases and controls differed in DNAm (unadjusted P < .01) at the time of diagnosis (n = 28,787 probes), and pre-diagnosis (n = 15,111 probes), with cg01404610 (General transcription factor IIA subunit 1 gene) significant after correction for multiple testing. Overall, 1150 probes overlapped between analyses (methylation differences from -10.6% to +11.0%), and effect sizes increased from pre-diagnosis to diagnosis. DISCUSSION Discernible blood DNAm signatures are in dementia cases before the appearance of overt clinical symptoms. Blood-based methylation may serve as a potential biomarker of dementia, but further investigation is needed to determine their true clinical utility.
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Affiliation(s)
- Peter Daniel Fransquet
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
| | - Paul Lacaze
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
| | - Richard Saffery
- Department of PaediatricsMurdoch Children's Research InstituteThe University of MelbourneParkvilleVictoriaAustralia
| | - James Phung
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
| | - Emily Parker
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
| | - Raj Shah
- Department of Family Medicine and Rush Alzheimer's Disease CenterRush University Medical CenterChicagoIllinoisUSA
| | - Anne Murray
- Berman Center for Outcomes and Clinical ResearchHennepin Healthcare, Division of GeriatricsDepartment of MedicineHennepin Healthcare Research InstituteUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - Robyn L. Woods
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
| | - Joanne Ryan
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
- PSNRECUniversité de MontpellierINSERMMontpellierFrance
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Yao L, Yang L, Song H, Liu T, Yan H. MicroRNA miR-29c-3p modulates FOS expression to repress EMT and cell proliferation while induces apoptosis in TGF-β2-treated lens epithelial cells regulated by lncRNA KCNQ1OT1. Biomed Pharmacother 2020; 129:110290. [PMID: 32534225 DOI: 10.1016/j.biopha.2020.110290] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 05/13/2020] [Accepted: 05/16/2020] [Indexed: 10/24/2022] Open
Abstract
Age-related cataract (ARC) is a main cause of blindness for elderly people. MicroRNA hsa_miR-29c-3p (miR-29c-3p) was implicated in many biological processes in complicated diseases. However, the biological mechanism of miR-29c-3p in ARC is still undefined. Quantitative real-time polymerase chain reaction (qRT-PCR) showed that miR-29c-3p was lowly expressed, while FBJ murine osteosarcoma viral oncogene homolog (FOS) and KCNQ1 overlapping transcript 1 (KCNQ1OT1) were highly expressed in cataract tissues and in TGF-β2-treated SRA01/04 cells. Western blot assay indicated that TGF-β2 could promote epithelial-mesenchymal transition (EMT). Moreover, our data suggested that miR-29c-3p overexpression suppressed EMT, cell proliferation and promoted apoptosis in TGF-β2-treated SRA01/04 cells. The dual-luciferase reporter assay verified that FOS was a target of miR-29c-3p and miR-29c-3p was directly targeted by KCNQ1OT1. Furthermore, KCNQ1OT1 could regulate FOS expression by sponging miR-29c-3p. Functional assays revealed that miR-29c-3p regulated FOS to repress EMT, cell proliferation and facilitate apoptosis in TGF-β2-treated SRA01/04 cells mediated by KCNQ1OT1. In conclusion, KCNQ1OT1/miR-29c-3p/FOS axis played a vital role in the progression of ARC.
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Affiliation(s)
- Ling Yao
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Lei Yang
- Tianjin Key Laboratory of Tianjin Nankai Hospital, Tianjin, China
| | - Hui Song
- Department of Ophthalmology, Tianjin Eye Hospital, Tianjin, China
| | - Tiegang Liu
- Department of Ophthalmology, Beijing Capital International Airport Hospital, Beijing, China
| | - Hua Yan
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China.
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Fan C, Liu X, Li W, Wang H, Teng Y, Ren J, Huang Y. Circular RNA circ KMT2E is up-regulated in diabetic cataract lenses and is associated with miR-204-5p sponge function. Gene 2019; 710:170-177. [DOI: 10.1016/j.gene.2019.05.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/22/2019] [Accepted: 05/28/2019] [Indexed: 12/11/2022]
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