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Sun Y, Sha Y, Yang J, Fu H, Hou X, Li Z, Xie Y, Wang G. Collagen is crucial target protein for scleral remodeling and biomechanical change in myopia progression and control. Heliyon 2024; 10:e35313. [PMID: 39170348 PMCID: PMC11336648 DOI: 10.1016/j.heliyon.2024.e35313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 07/25/2024] [Accepted: 07/26/2024] [Indexed: 08/23/2024] Open
Abstract
In recent decades, the prevalence of myopia has been on the rise globally, attributed to changes in living environments and lifestyles. This increase in myopia has become a significant public health concern. High myopia can result in thinning of the sclera and localized ectasia of the posterior sclera, which is the primary risk factor for various eye diseases and significantly impacts patients' quality of life. Therefore, it is essential to explore effective prevention strategies and programs for individuals with myopia. Collagen serves as the principal molecule in the extracellular matrix (ECM) of scleral tissue, consisting of irregular collagen fibrils. Collagen plays a crucial role in myopia progression and control. During the development of myopia, the sclera undergoes a thinning process which is primarily influenced by collagen expression decreased and remodeled, thus leading to a decrease in its biomechanical properties. Improving collagen expression and promoting collagen crosslinking can slow down the progression of myopia. In light of the above, improving collagen expression or enhancing the mechanical properties of collagen fibers via medication or surgery represents a promising approach to control myopia.
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Affiliation(s)
- Yun Sun
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Yaru Sha
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Jing Yang
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Hong Fu
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Xinyu Hou
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Zhuozheng Li
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Yongfang Xie
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
| | - Guohui Wang
- School of Life Science and Technology, Shandong Second Medical University, Weifang, 261053, China
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Ham SY, Pyo MJ, Kang M, Kim YS, Lee DH, Chung JH, Lee ST. HSP47 Increases the Expression of Type I Collagen in Fibroblasts through IRE1α Activation, XBP1 Splicing, and Nuclear Translocation of β-Catenin. Cells 2024; 13:527. [PMID: 38534372 DOI: 10.3390/cells13060527] [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: 12/15/2023] [Revised: 03/13/2024] [Accepted: 03/15/2024] [Indexed: 03/28/2024] Open
Abstract
Heat shock protein 47 (HSP47), also known as SERPINH1, functions as a collagen-specific molecular chaperone protein essential for the formation and stabilization of the collagen triple helix. Here, we delved into the regulatory pathways governed by HSP47, shedding light on collagen homeostasis. Our investigation revealed a significant reduction in HSP47 mRNA levels in the skin tissue of older mice as compared to their younger counterparts. The augmented expression of HSP47 employing lentivirus infection in fibroblasts resulted in an increased secretion of type I collagen. Intriguingly, the elevated expression of HSP47 in fibroblasts correlated with increased protein and mRNA levels of type I collagen. The exposure of fibroblasts to IRE1α RNase inhibitors resulted in the reduced manifestation of HSP47-induced type I collagen secretion and expression. Notably, HSP47-overexpressing fibroblasts exhibited increased XBP1 mRNA splicing. The overexpression of HSP47 or spliced XBP1 facilitated the nuclear translocation of β-catenin and transactivated a reporter harboring TCF binding sites on the promoter. Furthermore, the overexpression of HSP47 or spliced XBP1 or the augmentation of nuclear β-catenin through Wnt3a induced the expression of type I collagen. Our findings substantiate that HSP47 enhances type I collagen expression and secretion in fibroblasts by orchestrating a mechanism that involves an increase in nuclear β-catenin through IRE1α activation and XBP1 splicing. This study therefore presents potential avenues for an anti-skin-aging strategy targeting HSP47-mediated processes.
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Affiliation(s)
- So Young Ham
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Min Ju Pyo
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Moonkyung Kang
- R&D Center, artiCure Inc., Daejeon 34134, Republic of Korea
| | - Yeon-Soo Kim
- R&D Center, artiCure Inc., Daejeon 34134, Republic of Korea
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Dong Hun Lee
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
- Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul 03080, Republic of Korea
- Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Republic of Korea
| | - Jin Ho Chung
- Department of Dermatology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
- Laboratory of Cutaneous Aging Research, Biomedical Research Institute, Seoul National University Hospital, Seoul 03080, Republic of Korea
- Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Republic of Korea
- Institute on Aging, Seoul National University, Seoul 03080, Republic of Korea
| | - Seung-Taek Lee
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
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Tang X, Liu L, Liu S, Song S, Li H. MicroRNA-29a inhibits collagen expression and induces apoptosis in human fetal scleral fibroblasts by targeting the Hsp47/Smad3 signaling pathway. Exp Eye Res 2022; 225:109275. [PMID: 36206860 DOI: 10.1016/j.exer.2022.109275] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/06/2022] [Accepted: 10/01/2022] [Indexed: 12/29/2022]
Abstract
Members of the microRNA-29 (miR-29) gene family have been implicated as suppressors of collagen in several human diseases. The present study aimed to explore the function of miR-29a in human fetal scleral fibroblasts (HFSFs) and to investigate potential mechanisms by which the molecule regulates cellular functioning. First, HFSFs were transfected with miR-29a mimic, miR-29a inhibitor, or their corresponding controls. Then, cell proliferation and apoptosis were assessed using a CCK-8 assay and flow cytometry, respectively. Further, using real-time PCR, western blotting, and immunofluorescence staining, levels of miR-29a, heat shock protein 47 (Hsp47), COL1A1, Smad3, P-Smad3, Bax, and Bcl-2 were investigated. Next, empty vectors and SERPINH1-overexpressing vectors were used to transfect HFSFs. Western blotting and flow cytometry were performed to assess changes in levels of HFSF protein expression and apoptosis, respectively. Results indicated that the miR-29a mimic significantly inhibited Hsp47, Smad3, P-Smad3, and COL1A1 expression. Conversely, the miR-29a inhibitor enhanced the expression of the same genes. Furthermore, miR-29a overexpression inhibited HFSFs proliferation and enhanced the rate of HFSFs apoptosis. Consistent with this finding, miR-29a overexpression led to the downregulation of Bcl-2 and upregulation of Bax. In contrast, miR-29a suppression led to the upregulation of Bcl-2 and downregulation of Bax expression and reduced the rate of apoptosis. Additional research revealed that overexpression of Hsp47 prevented HFSFs apoptosis and enhanced collagen production. Findings that miR-29a overexpression reduces collagen expression levels, slows proliferation, and promotes apoptosis in HFSFs highlight the key role of miR-29a in scleral remodeling. The effects of miR-29a on scleral remodeling might mediate by targeting Hsp47 and repressing the Smad3 pathway.
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Affiliation(s)
- Xiaolan Tang
- Department of Ophthalmology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Ling Liu
- Department of Ophthalmology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Shichun Liu
- Department of Ophthalmology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Shengfang Song
- Department of Ophthalmology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China.
| | - Hua Li
- Department of Ophthalmology, Yongchuan Hospital, Chongqing Medical University, Chongqing, China.
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Wang WW, Yu HZ, Yang X, Xu QQ, Yan HH, Liu JR. High Levels of Heat Shock Protein 47 in the Aqueous Humor of Patients with Acute Primary Angle Closure. Ophthalmic Res 2022; 66:307-311. [PMID: 36315987 DOI: 10.1159/000527634] [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: 11/22/2021] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Acute primary angle closure (APAC) is often characterized by acute elevation of intraocular pressure accompanied by severe ocular and systemic symptoms. Excessive collagen accumulation, which can be caused by upregulated heat shock protein 47 (HSP47) expression, can produce scarring in rat conjunctival blebs. Meanwhile, the presence of HSP47 in human aqueous humor and its levels are yet to be determined. METHODS We examined 32 consecutive patients with APAC and 16 age-matched participants without APAC scheduled for cataract surgery who were enrolled as a control group. Aqueous humor samples were collected from all subjects at the time of surgery and compared between the subjects with and without APAC. RESULTS The levels of HSP47 in the aqueous humor of patients with APAC (1,210.4 ± 450.2 pg/mL) were found to be significantly increased (p = 0.001) compared with those in the control group (863.4 ± 240.0 pg/mL). Notably, the levels of HSP47 negatively correlated with the age of patients with APAC (p = 0.023). CONCLUSION HSP47 was upregulated in the aqueous humor of patients with APAC and may play a role in scarring after trabeculectomy for APAC.
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Affiliation(s)
- Wei-Wei Wang
- Shaanxi Eye Hospital, Xi'an People' s Hospital (Xi'an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Hai-Zhen Yu
- Department of Clinical Laboratory, Xi'an People' s Hospital (Xi'an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Xin Yang
- Shaanxi Eye Hospital, Xi'an People' s Hospital (Xi'an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Qian-Qian Xu
- Shaanxi Eye Hospital, Xi'an People' s Hospital (Xi'an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Huan-Huan Yan
- Shaanxi Eye Hospital, Xi'an People' s Hospital (Xi'an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Jian-Rong Liu
- Shaanxi Eye Hospital, Xi'an People' s Hospital (Xi'an Fourth Hospital), Affiliated Guangren Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, China
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