1
|
Han M, Liu H, Liu G, Li X, Zhou L, Liu Y, Dou T, Yang S, Tang W, Wang Y, Li L, Ding H, Liu Z, Wang J, Chen X. Mogroside V alleviates inflammation response by modulating miR-21-5P/SPRY1 axis. Food Funct 2024; 15:1909-1922. [PMID: 38258992 DOI: 10.1039/d3fo01901b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Mogroside V (MV) is a natural sweetener extracted from the edible plant Siraitia grosvenorii that possesses anti-inflammatory bioactivity. It has been reported that microRNAs (miRNAs) play an important role in the inflammation response suppression by natural agents. However, whether the anti-inflammation effect of mogroside V is related to miRNAs and the underlying mechanism remains unclear. Our study aimed to identify the key miRNAs important for the anti-inflammation effect of MV and reveal its underlying mechanisms. Our results showed that MV effectively alleviated lung inflammation in ovalbumin-induced (OVA-induced) asthmatic mice. miRNA-seq and mRNA-seq combined analysis identified miR-21-5p as an important miRNA for the inflammation inhibition effect of MV and it predicted SPRY1 to be a target gene of miR-21-5p. We found that MV significantly inhibited the production of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-2 (IL-2), interleukin-6 (IL-6), and nitric oxide (NO), as well as the protein expression of p-P65/P65, cyclooxygenase-2 (COX-2), and inducible nitric oxide synthase (iNOS) in OVA-induced asthmatic mice and LPS-treated RAW 264.7 cells. Moreover, the release of ROS increased in LPS-stimulated RAW 264.7 cells but was mitigated by MV pretreatment. In the meantime, the expression of miR-21-5p was decreased by MV, leading to an increase in the expression of SPRY1 in RAW 264.7 cells. Furthermore, miR-21-5p overexpression or SPRY1 knockdown reversed MV's protective effect on inflammatory responses. Conversely, miR-21-5p inhibition or SPRY1 overexpression enhanced MV's effect on inflammatory responses in LPS-exposed RAW 264.7 cells. Therefore, the significant protective effect of mogroside V on inflammation response is related to the downregulation of miR-21-5p and upregulation of SPRY1 in vitro and in vivo, MiR-21-5p/SPRY1 may be novel therapeutic targets of MV for anti-inflammation treatment.
Collapse
Affiliation(s)
- Mengjie Han
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Haiping Liu
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
- School of Pharmacy, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, 999078, P.R. China
| | - Guoxiang Liu
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Xiaojuan Li
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Luwei Zhou
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Yisa Liu
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Tong Dou
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
- School of Pharmacy, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, 999078, P.R. China
| | - Sijie Yang
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Wei Tang
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Yan Wang
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Linjun Li
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Hongfang Ding
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Zhangchi Liu
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| | - Juan Wang
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
- Guangxi Key Laboratory of Molecular Medicine in Liver Injury and Repair, Guilin Medical University, 541001, P.R. China
- Guangxi Health Commission Key Laboratory of Basic Research in Sphingolipid Metabolism Related Diseases, the Affiliated Hospital of Guilin Medical University, Guilin, 541001, Guangxi, China
- Faculty of Basic Medicine, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Xu Chen
- Department of Pharmacy, Guilin Medical University, Guilin 541199, P.R. China.
| |
Collapse
|
2
|
Wazin F, Lovicu FJ. Conditional Ablation of Spred1 and Spred2 in the Eye Lens Negatively Impacts Its Development and Growth. Cells 2024; 13:290. [PMID: 38391903 PMCID: PMC10886530 DOI: 10.3390/cells13040290] [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: 12/18/2023] [Revised: 01/30/2024] [Accepted: 01/30/2024] [Indexed: 02/24/2024] Open
Abstract
The development and growth of the eye depends on normal lens morphogenesis and its growth. This growth, in turn, is dependent on coordinated proliferation of the lens epithelial cells and their subsequent differentiation into fiber cells. These cellular processes are tightly regulated to maintain the precise cellular structure and size of the lens, critical for its transparency and refractive properties. Growth factor-mediated MAPK signaling driven by ERK1/2 has been reported as essential for regulating cellular processes of the lens, with ERK1/2 signaling tightly regulated by endogenous antagonists, including members of the Sprouty and related Spred families. Our previous studies have demonstrated the importance of both these inhibitory molecules in lens and eye development. In this study, we build on these findings to highlight the importance of Spreds in regulating early lens morphogenesis by modulating ERK1/2-mediated lens epithelial cell proliferation and fiber differentiation. Conditional loss of both Spred1 and Spred2 in early lens morphogenesis results in elevated ERK1/2 phosphorylation, hyperproliferation of lens epithelia, and an associated increase in the rate of fiber differentiation. This results in transient microphakia and microphthalmia, which disappears, owing potentially to compensatory Sprouty expression. Our data support an important temporal role for Spreds in the early stages of lens morphogenesis and highlight how negative regulation of ERK1/2 signaling is critical for maintaining lens proliferation and fiber differentiation in situ throughout life.
Collapse
Affiliation(s)
- Fatima Wazin
- Molecular and Cellular Biomedicine, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia;
| | - Frank J. Lovicu
- Molecular and Cellular Biomedicine, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia;
- Save Sight Institute, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| |
Collapse
|
3
|
Zhu M, Hu W, Lin L, Yang Q, Zhang L, Xu J, Xu Y, Liu J, Zhang M, Tong X, Zhu K, Feng K, Feng Y, Su J, Huang X, Li J. Single-cell RNA sequencing reveals new subtypes of lens superficial tissue in humans. Cell Prolif 2023; 56:e13477. [PMID: 37057399 PMCID: PMC10623935 DOI: 10.1111/cpr.13477] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/27/2023] [Accepted: 04/01/2023] [Indexed: 04/15/2023] Open
Abstract
Although the cell atlas of the human ocular anterior segment of the human eye was revealed by single-nucleus RNA sequencing, whether subtypes of lens stem/progenitor cells exist among epithelial cells and the molecular characteristics of cell differentiation of the human lens remain unclear. Single-cell RNA sequencing is a powerful tool to analyse the heterogeneity of tissues at the single cell level, leading to a better understanding of the processes of cell differentiation. By profiling 18,596 cells in human lens superficial tissue through single-cell sequencing, we identified two subtypes of lens epithelial cells that specifically expressed C8orf4 and ADAMTSL4 with distinct spatial localization, a new type of fibre cells located directly adjacent to the epithelium, and a subpopulation of ADAMTSL4+ cells that might be lens epithelial stem/progenitor cells. We also found two trajectories of lens epithelial cell differentiation and changes of some important genes during differentiation.
Collapse
Affiliation(s)
- Meng‐Chao Zhu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Wei Hu
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology, Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative MedicineFudan UniversityShanghaiChina
| | - Lei Lin
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Qing‐Wen Yang
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Lu Zhang
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Jia‐Lin Xu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Yi‐Tong Xu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Jia‐Sheng Liu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Meng‐Di Zhang
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Xiao‐Yu Tong
- Zhejiang Provincial Clinical Research Center for Pediatric DiseaseThe Second Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiangChina
| | - Kai‐Yi Zhu
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Ke Feng
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Yi Feng
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology, Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative MedicineFudan UniversityShanghaiChina
| | - Jian‐Zhong Su
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| | - Xiu‐Feng Huang
- Zhejiang Provincial Clinical Research Center for Pediatric DiseaseThe Second Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiangChina
| | - Jin Li
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye HospitalWenzhou Medical UniversityWenzhouChina
- National Clinical Research Center for Ocular Diseases, Eye HospitalWenzhou Medical UniversityWenzhouChina
| |
Collapse
|
4
|
FGF-2 Differentially Regulates Lens Epithelial Cell Behaviour during TGF-β-Induced EMT. Cells 2023; 12:cells12060827. [PMID: 36980168 PMCID: PMC10046997 DOI: 10.3390/cells12060827] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/02/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023] Open
Abstract
Fibroblast growth factor (FGF) and transforming growth factor-beta (TGF-β) can regulate and/or dysregulate lens epithelial cell (LEC) behaviour, including proliferation, fibre differentiation, and epithelial–mesenchymal transition (EMT). Earlier studies have investigated the crosstalk between FGF and TGF-β in dictating lens cell fate, that appears to be dose dependent. Here, we tested the hypothesis that a fibre-differentiating dose of FGF differentially regulates the behaviour of lens epithelial cells undergoing TGF-β-induced EMT. Postnatal 21-day-old rat lens epithelial explants were treated with a fibre-differentiating dose of FGF-2 (200 ng/mL) and/or TGF-β2 (50 pg/mL) over a 7-day culture period. We compared central LECs (CLECs) and peripheral LECs (PLECs) using immunolabelling for changes in markers for EMT (α-SMA), lens fibre differentiation (β-crystallin), epithelial cell adhesion (β-catenin), and the cytoskeleton (alpha-tropomyosin), as well as Smad2/3- and MAPK/ERK1/2-signalling. Lens epithelial explants cotreated with FGF-2 and TGF-β2 exhibited a differential response, with CLECs undergoing EMT while PLECs favoured more of a lens fibre differentiation response, compared to the TGF-β-only-treated explants where all cells in the explants underwent EMT. The CLECs cotreated with FGF and TGF-β immunolabelled for α-SMA, with minimal β-crystallin, whereas the PLECs demonstrated strong β-crystallin reactivity and little α-SMA. Interestingly, compared to the TGF-β-only-treated explants, α-SMA was significantly decreased in the CLECs cotreated with FGF/TGF-β. Smad-dependent and independent signalling was increased in the FGF-2/TGF-β2 co-treated CLECs, that had a heightened number of cells with nuclear localisation of Smad2/3 compared to the PLECs, that in contrast had more pronounced ERK1/2-signalling over Smad2/3 activation. The current study has confirmed that FGF-2 is influential in differentially regulating the behaviour of LECs during TGF-β-induced EMT, leading to a heterogenous cell population, typical of that observed in the development of post-surgical, posterior capsular opacification (PCO). This highlights the cooperative relationship between FGF and TGF-β leading to lens pathology, providing a different perspective when considering preventative measures for controlling PCO.
Collapse
|
5
|
Ornitz DM, Itoh N. New developments in the biology of fibroblast growth factors. WIREs Mech Dis 2022; 14:e1549. [PMID: 35142107 PMCID: PMC10115509 DOI: 10.1002/wsbm.1549] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 01/28/2023]
Abstract
The fibroblast growth factor (FGF) family is composed of 18 secreted signaling proteins consisting of canonical FGFs and endocrine FGFs that activate four receptor tyrosine kinases (FGFRs 1-4) and four intracellular proteins (intracellular FGFs or iFGFs) that primarily function to regulate the activity of voltage-gated sodium channels and other molecules. The canonical FGFs, endocrine FGFs, and iFGFs have been reviewed extensively by us and others. In this review, we briefly summarize past reviews and then focus on new developments in the FGF field since our last review in 2015. Some of the highlights in the past 6 years include the use of optogenetic tools, viral vectors, and inducible transgenes to experimentally modulate FGF signaling, the clinical use of small molecule FGFR inhibitors, an expanded understanding of endocrine FGF signaling, functions for FGF signaling in stem cell pluripotency and differentiation, roles for FGF signaling in tissue homeostasis and regeneration, a continuing elaboration of mechanisms of FGF signaling in development, and an expanding appreciation of roles for FGF signaling in neuropsychiatric diseases. This article is categorized under: Cardiovascular Diseases > Molecular and Cellular Physiology Neurological Diseases > Molecular and Cellular Physiology Congenital Diseases > Stem Cells and Development Cancer > Stem Cells and Development.
Collapse
Affiliation(s)
- David M Ornitz
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Nobuyuki Itoh
- Kyoto University Graduate School of Pharmaceutical Sciences, Sakyo, Kyoto, Japan
| |
Collapse
|
6
|
Zhao G, Pan AY, Feng Y, Rasko JE, Bailey CG, Lovicu FJ. Sprouty and Spred temporally regulate ERK1/2-signaling to suppress TGFβ-induced lens EMT. Exp Eye Res 2022; 219:109070. [DOI: 10.1016/j.exer.2022.109070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/22/2022] [Accepted: 04/04/2022] [Indexed: 11/04/2022]
|
7
|
Wang X, Lu W, Liu B, Xu Y. Thrombin aggravates hypoxia/reoxygenation injury of astrocytes by activating the autophagy pathway mediated by SPRED2. Exp Ther Med 2021; 22:1107. [PMID: 34504561 PMCID: PMC8383739 DOI: 10.3892/etm.2021.10541] [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: 07/28/2020] [Accepted: 03/24/2021] [Indexed: 11/06/2022] Open
Abstract
Autophagy plays an important role in ischemia/reperfusion brain injury, however, the signaling pathways involved in cell autophagy are not fully understood. The present study aimed to investigate the roles and molecular mechanisms of thrombin and Sprouty-related EVH1 domain-2 (SPRED2) on autophagy in hypoxia/reoxygenation (H/R) induced astrocytes. Reverse transcription-quantitative PCR and western blot analyses were performed to detect the expression levels of thrombin and SPRED2. Western blot analysis was also performed to detect the protein expression levels of Beclin 1, microtubule-associated protein light chain 3 (LC3)-II and LC3-I. The MTT assay was performed to assess cell viability, while ELISA was performed to determine the supernatant levels of interleukin (IL)-1β, IL-6 and tumor necrosis factor-α. The results demonstrated that the effects of H/R induction on inflammatory factor secretion, oxidative stress, autophagy and cell viability in astrocytes were aggravated by thrombin, the effects of which were reversed following SPRED2 knockdown. Taken together, the results of the present study suggest that thrombin aggravates H/R injury in astrocytes by activating the SPRED2-mediated autophagy.
Collapse
Affiliation(s)
- Xiaoning Wang
- Department of Blood Transfusion, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Weiwei Lu
- Department of Blood Transfusion, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Bing Liu
- Department of Blood Transfusion, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yunhe Xu
- Department of Stomatology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| |
Collapse
|
8
|
Spred2-deficiency enhances the proliferation of lung epithelial cells and alleviates pulmonary fibrosis induced by bleomycin. Sci Rep 2020; 10:16490. [PMID: 33020583 PMCID: PMC7536438 DOI: 10.1038/s41598-020-73752-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 09/08/2020] [Indexed: 11/17/2022] Open
Abstract
The mitogen-activated protein kinase (MAPK) pathways are involved in many cellular processes, including the development of fibrosis. Here, we examined the role of Sprouty-related EVH-1-domain-containing protein (Spred) 2, a negative regulator of the MAPK-ERK pathway, in the development of bleomycin (BLM)-induced pulmonary fibrosis (PF). Compared to WT mice, Spred2−/− mice developed milder PF with increased proliferation of bronchial epithelial cells. Spred2−/− lung epithelial cells or MLE-12 cells treated with spred2 siRNA proliferated faster than control cells in vitro. Spred2−/− and WT macrophages produced similar levels of TNFα and MCP-1 in response to BLM or lipopolysaccharide and myeloid cell-specific deletion of Spred2 in mice had no effect. Spred2−/− fibroblasts proliferated faster and produced similar levels of MCP-1 compared to WT fibroblasts. Spred2 mRNA was almost exclusively detected in bronchial epithelial cells of naïve WT mice and it accumulated in approximately 50% of cells with a characteristic of Clara cells, 14 days after BLM treatment. These results suggest that Spred2 is involved in the regulation of tissue repair after BLM-induced lung injury and increased proliferation of lung bronchial cells in Spred2−/− mice may contribute to faster tissue repair. Thus, Spred2 may present a new therapeutic target for the treatment of PF.
Collapse
|
9
|
Wu Y, Zhang K, Liu R, Zhang H, Chen D, Yu S, Chen W, Wan S, Zhang Y, Jia Z, Chen R, Ding F. MicroRNA-21-3p accelerates diabetic wound healing in mice by downregulating SPRY1. Aging (Albany NY) 2020; 12:15436-15445. [PMID: 32634115 PMCID: PMC7467375 DOI: 10.18632/aging.103610] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 06/09/2020] [Indexed: 12/11/2022]
Abstract
A variety of novel drugs and advanced therapeutic strategies have been developed for diabetic foot ulcers (DFUs); however, the clinical outcomes are unsatisfactory and the underlying mechanisms of DFU remain elusive. MicroRNAs (miRNA) regulate the pathological processes of many diseases. Fibroblasts are involved in each stage of wound healing, and the functions of fibroblasts may be regulated by miRNAs. In the present study, we found that the levels of miRNA-21-3p (miR-21-3p) were decreased in patients with diabetes as compared with those in the healthy control. Similarly, the level of miRNA-21-3p was decreased in fibroblasts that were stimulated with D-glucose as compared with that in the control fibroblasts. Furthermore, enhanced function was found in fibroblasts followed by the miR-21-3p agonist treatment, and a rapid wound healing process was achieved in the miR-21-3p agonist-treated mice. MiR-21-3p directly targeted protein sprout homolog 1 (SPRY1), and the miR-21-3p-regulated reduction in SPRY1 enhanced the function of fibroblasts and accelerated wound healing in vivo. These findings suggest that miR-21-3p may treat DFU by reducing SPRY1.
Collapse
Affiliation(s)
- Yaohong Wu
- Department of Orthopedics, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou 341000, Jiangxi, China
| | - Kun Zhang
- Department of Orthopedics, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430033, Hubei, China
| | - Rong Liu
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Hexing Zhang
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Dong Chen
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Shuangqi Yu
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Wei Chen
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Song Wan
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Yi Zhang
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| | - Zhiwei Jia
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Rongchun Chen
- Department of Orthopedics, The Affiliated Ganzhou Hospital of Nanchang University, Ganzhou 341000, Jiangxi, China
| | - Fan Ding
- Department of Orthopaedics, Puren Hospital, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
| |
Collapse
|
10
|
Wazin F, Lovicu FJ. The negative regulatory Spred1 and Spred2 proteins are required for lens and eye morphogenesis. Exp Eye Res 2020; 191:107917. [PMID: 31923414 DOI: 10.1016/j.exer.2020.107917] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/19/2019] [Accepted: 01/03/2020] [Indexed: 01/29/2023]
Abstract
The transparent and refractive properties of the ocular lens are dependent on its precise cellular structure, supported by the regulation of lens cellular processes of proliferation and differentiation that are essential throughout life. The ERK/MAPK-signalling pathway plays a crucial role in regulating lens cell proliferation and differentiation, and in turn is regulated by inhibitory molecules including the Spred family of proteins to modulate and attenuate the impact of growth factor stimulation. Given Spreds are strongly and distinctly expressed in lens, along with their established inhibitory role in a range of different tissues, we investigated the role these antagonists play in regulating lens cell proliferation and differentiation, and their contribution to lens structure and growth. Using established mice lines deficient for either or both Spred 1 and Spred 2, we demonstrate their role in regulating lens development by negatively regulating ERK1/2 activity. Mice deficient for both Spred 1 and Spred 2 have impaired lens and eye development, displaying irregular lens epithelial and fibre cell activity as a result of increased levels of phosphorylated ERK1/2. While Spred 1 and Spred 2 do not appear to be necessary for induction and early stages of lens morphogenesis (prior to E11.5), nor for the formation of the primary fibre cells, they are required for the continuous embryonic growth and differentiation of the lens.
Collapse
Affiliation(s)
- Fatima Wazin
- Discipline of Anatomy and Histology, School of Medical Science, The University of Sydney, NSW, Australia and Save Sight Institute, The University of Sydney, NSW, Australia
| | - Frank J Lovicu
- Discipline of Anatomy and Histology, School of Medical Science, The University of Sydney, NSW, Australia and Save Sight Institute, The University of Sydney, NSW, Australia.
| |
Collapse
|