1
|
Yu JL, Zhao JK, Luo SQ, Zhu YT, Zhang WH, Hu QW, Liu SL. [Characterization of Microplastic Surface Bacterial Community Structure and Prediction of Ecological Risk in Poyang Lake, China]. Huan Jing Ke Xue 2024; 45:3098-3106. [PMID: 38629570 DOI: 10.13227/j.hjkx.202305055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
In recent years, the environmental pollution of microplastics in Poyang Lake has received increasing attention. Baisha Lake of Poyang Lake was selected as the study area, and samples of water and sediments of Baisha Lake and the microplastics therein were collected, and the polymer types of microplastics were identified as polyethylene (PE), polyester (PET), polypropylene (PP), and polystyrene (PS) using Fourier infrared spectroscopy. We also analyzed the structural composition of bacterial communities in water, in sediments, and on microplastic surfaces using 16S high-throughput sequencing. The species richness and diversity of bacteria on the microplastic surfaces were lower than those in the surrounding water and sediments. The results of NMDS analysis showed that the bacterial community structures on the microplastic surfaces differed greatly from those in the surrounding sediments and water. The bacterial community composition in water and sediment differed from that on the microplastic surfaces, and the dominant bacterial phyla on the microplastic surfaces were Proteobacteria and Bacteroidota, and their relative abundance on the microplastic surfaces was higher than that in sediment. The relative abundance of Proteobacteria was higher than that in water. The relative abundances of Bacteroidota and Actinobacteriota were significantly lower than that of water. Massilia and Pseudomonas were the dominant genera on the microplastic surfaces, and their relative abundances were significantly higher than those in the surrounding water and sediments. BugBase phenotype prediction revealed that the relative abundance of contains mobile elements, biofilm formation, potential pathogenicity, and stress tolerance phenotypes of microplastic bacterial communities were significantly higher than those of the surrounding water and sediments. The results revealed that microplastics may have contributed to the spread of harmful bacteria, including pathogenic bacteria, and increased the potential pathogenicity of bacterial communities. Additionally, microplastic surface bacterial communities had higher phenotypes of mobile gene element content. Revealing the potential harm of microplastic pollution to wetland ecology at the micro level may provide a scientific reference for maintaining the ecological stability of wetlands.
Collapse
Affiliation(s)
- Jin-Li Yu
- School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China
- Key Laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
| | - Jun-Kai Zhao
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Si-Qi Luo
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Ying-Ting Zhu
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Wen-Hui Zhang
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Qi-Wu Hu
- School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China
- Key Laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
| | - Shu-Li Liu
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| |
Collapse
|
2
|
Zheng F, Su J, Wang J, Zhan Q, Su M, Ding S, Li W, Zhu YT, Guo P. Expression of ATP-Binding Cassette Transporter A1 (ABCA1) in Eyelid Tissues and Meibomian Gland Epithelial Cells. Invest Ophthalmol Vis Sci 2024; 65:24. [PMID: 38502139 PMCID: PMC10959198 DOI: 10.1167/iovs.65.3.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 02/27/2024] [Indexed: 03/20/2024] Open
Abstract
Purpose To validate the adenosine triphosphate (ATP)-binding cassette transporter A1 (ABCA1) expression and distribution in human eyelid tissues and meibomian gland epithelial cells. Methods Meibomian gland tissues from human eyelids were isolated by collagenase A digestion and cultured in defined keratinocyte serum-free medium (DKSFM). Infrared imaging was used to analyze the general morphology of meibomian glands. Hematoxylin and eosin (H&E) staining and Oil Red O staining were used to observe the morphological structure and lipid secretion in the human meibomian gland tissues. Quantitative real-time polymerase chain reaction, western blotting, and immunostaining were used to detect the mRNA and protein expression and cytolocalization of ABCA1 in the meibomian gland tissues and cultured cells. Results The degree of loss of human meibomian gland tissue was related to age. Meibomian gland lipid metabolism was also associated with age. Additionally, human meibomian gland tissues express ABCA1 mRNA and protein; glandular epithelial cells express more ABCA1 mRNA and protein than acinar cells, and their expression in acinar cells decreases with differentiation. Furthermore, the expression of ABCA1 was downregulated in abnormal meibomian gland tissues. ABCA1 was mainly localized on the cell membrane in primary human meibomian gland epithelial cells (pHMGECs), whereas it was localized in the cytoplasm of immortalized human meibomian gland epithelial cells (iHMGECs). The mRNA and protein levels of ABCA1 in pHMGECs were higher than those in iHMGECs. Conclusions Meibomian gland tissues of the human eyelid degenerate with age. ABCA1 expression in acinar cells decreases after differentiation and plays an important role in meibomian gland metabolism.
Collapse
Affiliation(s)
- Fang Zheng
- Department of Ophthalmology, Jinzhou Medical University, Jinzhou, China
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Jingjing Su
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Jiaoman Wang
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Qing Zhan
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Mei Su
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Sicheng Ding
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Wei Li
- Eye Institute of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | | | - Ping Guo
- Shenzhen Eye Institute, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| |
Collapse
|
3
|
Zhou ZD, Zhu YT, Zhong YM, Fang L, Lin SF, Zhuo YH, Liu X. [Analysis of disease composition and primary surgical procedures in pediatric secondary glaucoma inpatients: a single-center study]. Zhonghua Yan Ke Za Zhi 2023; 59:709-715. [PMID: 37670653 DOI: 10.3760/cma.j.cn112142-20230310-00095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Objective: To analyze the disease composition and primary surgical procedures in pediatric inpatients with secondary glaucoma. Methods: A retrospective case series study was conducted. Clinical data of children aged≤16 years with secondary glaucoma who were admitted to the Zhongshan Ophthalmic Center, Sun Yat-sen University, between January 1, 2017, and December 31, 2021, were included. The patients were classified according to the Childhood Glaucoma Research Network (CGRN) classification system, and their diagnoses, underlying factors, gender, age of onset, affected eye(s), age and type of initial surgery, and ophthalmic examination data were analyzed. Statistical analysis was performed using Kruskal-Wallis rank sum test and χ2 test. Results: A total of 540 patients (744 eyes) were included in this study, comprising 319 males (59.1%) and 221 females (40.9%). Unilateral disease was observed in 336 cases (62.2%), while bilateral involvement was present in 204 cases (37.8%). The age of onset was 4.0 (0.0, 9.0) years, and the median age of the first anti-glaucoma surgery was 5.0 (0.7, 10.0) years. Among them, there were 195 cases (36.1%) of secondary glaucoma associated with non-acquired ocular anomalies (SCG-O), with a median age of onset of 0.0 (0.0, 4.0) years, and 97 of these cases (49.7%) were male. secondary glaucoma associated with non-acquired systemic disease or syndrome (SCG-S) were observed in 68 cases (12.6%), with a median age of glaucoma onset of 0.1 (0.0, 4.0) years, and 47 of these cases (69.1%) were male. Secondary glaucoma associated with acquired conditions (SCG-A) accounted for 192 cases (35.6%), with a median age of onset of 9.0 (5.0, 13.0) years, and 125 of these cases (65.1%) were male. There were 85 cases (15.7%) of secondary glaucoma following cataract surgery (SCG-C), with a median age of onset of 3.0 (0.8, 7.0) years, and 50 of these cases (58.8%) were male. Male patients were predominant in SCG-S and SCG-A, with 47 cases (69.1%) and 125 cases (65.1%), respectively (χ2=9.94, 17.52; P=0.002,<0.001). Except for SCG-O, all other types of pediatric secondary glaucoma predominantly affected only one eye: SCG-S in 52 cases (76.5%), SCG-A in 128 cases (66.7%), and SCG-C in 54 cases (63.5%) (χ2=19.06, 21.33, 6.22; all P<0.05). The highest proportion of SCG-O was attributed to congenital ectropion uveae (46 cases, 23.6%). Sturge-Weber syndrome was the most common SCG-S (45 cases, 66.3%), while SCG-A mostly resulted from trauma (59 cases, 30.8%) and corticosteroid use (56 cases, 29.2%). Trabeculectomy (211 eyes, 30.8%) and glaucoma drainage device implantation (197 eyes, 28.7%) were the most frequently performed primary surgical procedures. Conclusions: SCG-O and SCG-A were found to be common types of pediatric secondary glaucoma. The age of onset and the choice of primary anti-glaucoma surgical procedures varied among different types of pediatric secondary glaucoma. However, overall, trabeculectomy and glaucoma drainage device implantation were the primary surgical procedures predominantly employed.
Collapse
Affiliation(s)
- Z D Zhou
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - Y T Zhu
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - Y M Zhong
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - L Fang
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - S F Lin
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - Y H Zhuo
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - X Liu
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| |
Collapse
|
4
|
Zhu YT, Tighe S, Chen SL, Zhang Y, Chen SY, Kao WWY, Tseng SCG. Manufacturing of human corneal endothelial grafts. Ocul Surf 2023; 29:301-310. [PMID: 37268293 PMCID: PMC10529356 DOI: 10.1016/j.jtos.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 05/05/2023] [Accepted: 05/12/2023] [Indexed: 06/04/2023]
Abstract
PURPOSE Human corneal endothelial cells (HCECs) play a significant role in maintaining visual function. However, these cells are notorious for their limited proliferative capacity in vivo. Current treatment of corneal endothelial dysfunction resorts to corneal transplantation. Herein we describe an ex vivo engineering method to manufacture HCEC grafts suitable for transplantation through reprogramming into neural crest progenitors. METHODS HCECs were isolated by collagenase A from stripped Descemet membrane of cadaveric corneoscleral rims, and induced reprogramming via knockdown with p120 and Kaiso siRNAs on collagen IV-coated atelocollagen. Engineered HCEC grafts were released after assessing their identity, potency, viability, purity and sterility. Phase contrast was used for monitoring cell shape, graft size, and cell density. Immunostaining was used to determine the normal HCEC phenotype with expression of N-cadherin, ZO-1, ATPase, acetyl-α-tubulin, γ-tubulin, p75NTR, α-catenin, β-catenin, and F-actin. Stability of manufactured HCEC graft was evaluated after transit and storage for up to 3 weeks. The pump function of HCEC grafts was measured by lactate efflux. RESULTS One HCEC graft suitable for corneal transplantation was generated from 1/8th of the donor corneoscleral rim with normal hexagonal cell shape, density, and phenotype. The manufactured grafts were stable for up to 3 weeks at 37 °C or up to 1 week at 22 °C in MESCM medium and after transcontinental shipping at room temperature by retaining normal morphology (hexagonal, >2000 cells/mm2, >8 mm diameter), phenotype, and pump function. CONCLUSIONS This regenerative strategy through knockdown with p120 and Kaiso siRNAs can be used to manufacture HCEC grafts with normal phenotype, morphology and pump function following prolonged storage and shipping.
Collapse
Affiliation(s)
| | - Sean Tighe
- R&D Department, BioTissue, Miami, FL, 33126, USA
| | | | - Yuan Zhang
- R&D Department, BioTissue, Miami, FL, 33126, USA
| | - Szu-Yu Chen
- R&D Department, BioTissue, Miami, FL, 33126, USA
| | - Winston W Y Kao
- Department of Ophthalmology, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH, 45220, USA
| | | |
Collapse
|
5
|
Yu JL, Chen X, Zhang Y, Zhu YT, Zhang WH, Luo SQ, Liu SL. Bacterial community structure of water, sediment and microplastics in Poyang Lake wetland. Ying Yong Sheng Tai Xue Bao 2023; 34:1968-1974. [PMID: 37694481 DOI: 10.13287/j.1001-9332.202307.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
As a new type of pollutant, microplastics accumulate continuously in the environment. The environmental problems caused by microplastics have attracted wide attention. In this study, we collected water, sediment and four types of microplastics (film, foam, fiber and fragment) from wetland in East Lake area of Poyang Lake. We used high-throughput sequencing technology to analyze the bacterial diversity and community structure of water, sediment, and microplastics surface. The results showed that the bacterial richness and diversity of water and sediment were significantly higher than that on microplastics, and the bacterial richness of foaming microplastics was significantly lower than that of the other three types of microplastics. There were significant differences of bacterial communities between water, sediment, and microplastics. There were significant differences cross different types of microplastics. Proteobacteria, Bacteroidetes, and Actinobacteria were the main bacterial communities of water, sediment, and microplastics. The relative abundance of Bacteroidetes and Actinobacteria in water was higher than that in sediments and microplastics, while the relative abundance of Bacteroidetes and Actinobacteria in foaming microplastics was higher than that in other three types. At the genus level, the dominant ones included Massilia, Flavobacteria, and Pseudomonas. The relative abundance of Massilia and Pseudomonas in water and sediments was lower than that on microplastics, and the relative abundance of Flavobacteria was not different among water, sediment and microplastics. The relative abundance of Massilia in microplastics followed an order of fragment>fiber>film>foam, and that of Pseudomonas was film>fiber>foam>fragment. The results of metabolic pathway prediction analysis showed that except for foaming microplastics, the bacterial metabolic pathways on the surface of the other three types of microplastics were significantly different from those in water and sediment. The cellular processes, organismal systems, environmental information processing, and human diseases in bacterial metabolic pathways on microplastics surface were significantly higher than those in water and sediment. Our results suggested that microbial community structure on the surface of microplastics was significantly different from that in water and sediment, and that the morphology type of microplastics affected microbial community structure on the surface.
Collapse
Affiliation(s)
- Jin-Li Yu
- School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China
| | - Xu Chen
- College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Ying Zhang
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210024, China
- Jiangxi Water Resources Institute, Nanchang 330013, China
| | - Ying-Ting Zhu
- College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Wen-Hui Zhang
- College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Si-Qi Luo
- College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| | - Shu-Li Liu
- College of Life Science, Jiangxi Normal University, Nanchang 330022, China
| |
Collapse
|
6
|
Zhu Q, Tang GY, Hua ZJ, Xue LP, Zhou Y, Zhang JY, Zhu YT, Zhang XF. 0.05% atropine on control of myopia progression in Chinese school children: a randomized 3-year clinical trial. Int J Ophthalmol 2023; 16:939-946. [PMID: 37332542 PMCID: PMC10250955 DOI: 10.18240/ijo.2023.06.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 04/27/2023] [Indexed: 06/20/2023] Open
Abstract
AIM To evaluate the effect of 0.05% atropine on the control of myopia for 2y (phase I) and on spherical equivalent refraction (SER) progression for 1y (phase II) after its withdrawal in Chinese myopic children. METHODS Totally 142 children with myopia were randomly assigned to the 0.05% atropine group or to the placebo group. In phase I, children received 1 treatment for each eye daily. In phase II, the patients received no treatment. Axial length (AL), SER, intraocular pressure (IOP) and atropine-related side effects were assessed at 6 months' intervals. RESULTS During phase I, the mean change of SER was -0.46±0.30 D in the atropine group, compared to -1.72±1.12 D in the placebo group (P<0.001). The mean change of AL in the atropine group (0.26±0.30 mm) was significantly shorter than that in the placebo group (0.76±0.62 mm, P=0.002). In addition, in phase II (12mo after the withdrawal of atropine), there was no significant difference in AL change from the atropine group, when compared with that from the placebo group (0.31±0.25 mm vs 0.28±0.26 mm, P>0.05). Furthermore, the change in SER from the atropine group was 0.50±0.41 D, which was significantly lower than 0.72±0.60 D from placebo group, (P<0.05). Finally, there were no statistically significant differences in IOP between the treatment and control groups at any stages (all P>0.05). CONCLUSION The use of 0.05% atropine for two consecutive years may effectively control elongation of AL and thus progression of myopia, without significant SER progression 1y after atropine withdrawal. Therefore, treatment with 0.05% atropine daily for 2y is effective and safe.
Collapse
Affiliation(s)
- Qin Zhu
- Department of Pediatric Ophthalmology, Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Guang-Yong Tang
- Department of Ophthalmology, People's Hospital of Xundian County, Kunming 655200, Yunnan Province, China
| | - Zhi-Juan Hua
- Department of Pediatric Ophthalmology, Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Li-Ping Xue
- Department of Pediatric Ophthalmology, Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Yuan Zhou
- Department of Pediatric Ophthalmology, Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Jie-Ying Zhang
- Department of Pediatric Ophthalmology, Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| | - Ying-Ting Zhu
- BioTissue (Tissue Tech, Inc.), Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL 33126, USA
| | - Xiao-Fan Zhang
- Department of Pediatric Ophthalmology, Affiliated Hospital of Yunnan University, Kunming 650021, Yunnan Province, China
| |
Collapse
|
7
|
Xie R, Wang ZR, Zhu YT, Yu JH, Zhuo YH. [Research progress on the epidemiology and risk factors of dry eye in children]. Zhonghua Yan Ke Za Zhi 2023; 59:321-325. [PMID: 37012598 DOI: 10.3760/cma.j.cn112142-20220804-00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
The prevalence of dry eye in children is increasing with changes in the environment and the widespread use of electronic products. However, due to poor ability to express themselves and hidden symptoms of children, lack of understanding of dry eye in children, children with dry eye are likely to be misdiagnosed. Dry eye can seriously affect the quality of children's learning, life, vision and visual development. Therefore, it is urgent to raise awareness of clinical workers about dry eye in children, prevent the occurrence of related complications of dry eye, and avoid permanent visual damage to children. This review discusses and summarizes the epidemiology and common risk factors of children with dry eye, with the aim of improving doctors' understanding of dry eye in children.
Collapse
Affiliation(s)
- R Xie
- Zhongshan Ophthalmic Center, SunYat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - Z R Wang
- Zhongshan Ophthalmic Center, SunYat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - Y T Zhu
- Zhongshan Ophthalmic Center, SunYat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| | - J H Yu
- Affiliated Foshan Maternity & Child Healthcare Hospital, Southern Medical University (Foshan Maternity & Child Healthcare Hospital), Foshan 528000, China
| | - Y H Zhuo
- Zhongshan Ophthalmic Center, SunYat-sen University, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, China
| |
Collapse
|
8
|
Liu YD, Zhu YT, Shi YH, Liu XX, Su WR, Zhuo YH. Deciphering Adult Neural Stem Cells with Single-Cell Sequencing. Stem Cells Dev 2023; 32:213-224. [PMID: 36721381 DOI: 10.1089/scd.2022.0234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Adult neural stem cells (NSCs) are restricted to the two neurogenic regions of the mammalian brain, where they self-renew and generate progenies of multiple lineages, including neurons, astrocytes, and oligodendrocytes. Single-cell RNA sequencing technology, which reconstructs high-resolution transcriptional landscapes, provides valuable insights into cellular heterogeneity and developmental dynamics. In this review, we overviewed recent progress in the single-cell analyses of both conventional and unconventional NSCs. We discussed the heterogeneity among the stem cell pool and characterized the transcriptional alterations in aging and brain tumors. A comprehensive understanding of NSCs in physiological and pathological settings will provide insights for the rejuvenation of the aged brain and restoration of normal brain function in multiple neurological disorders.
Collapse
Affiliation(s)
- Yi-Dan Liu
- Department of Glaucoma and State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Ying-Ting Zhu
- Department of Glaucoma and State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Yun-Hong Shi
- Department of Glaucoma and State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xiu-Xing Liu
- Department of Ocular Immunology & Uveitis, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Wen-Ru Su
- Department of Ocular Immunology & Uveitis, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Ye-Hong Zhuo
- Department of Glaucoma and State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| |
Collapse
|
9
|
Guan JY, Ma YC, Zhu YT, Xie LL, Aizezi M, Zhuo YH, Wumaier A. Lens nucleus dislocation in hypermature cataract: Case report and literature review. Medicine (Baltimore) 2022; 101:e30428. [PMID: 36107580 PMCID: PMC9439833 DOI: 10.1097/md.0000000000030428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
INTRODUCTION Hypermature cataract is a form of late-stage cataract progression that can lead to a variety of complications. Spontaneous capsular rupture with lens nucleus displacement in hypermature cataracts has rarely been reported. We describe 2 cases of spontaneous dislocation of the lens nucleus in a hypermature cataract and perform a review of the literature on this complication. PATIENT CONCERNS We report 2 rural men aged 50 and 76 years with deteriorating vision. DIAGNOSIS The final diagnosis was senile hypermature cataract with dislocation of the lens nucleus in both patients and secondary glaucoma for the second patient. INTERVENTIONS AND OUTCOMES During admission, both patients complained of deteriorating vision. Slit-lamp examination showed lens nucleus dislocation into the anterior chamber. The 50-year-old patient exhibited a residual lens capsule and a turbid cortex, with a normal anterior chamber and intraocular pressure. The 76-year-old patient presented a shrunken and ruptured capsule and no cortex in the pupillary area, mild inflammation in the anterior chamber, and high intraocular pressure. Both patients underwent intracapsular cataract extraction combined with anterior vitrectomy and achieved good postoperative recovery. CONCLUSION Lens nucleus dislocation in hypermature cataracts can be seen in clinical practice, particularly in underdeveloped areas. Early recognition and surgery can improve vision.
Collapse
Affiliation(s)
- Jie-Ying Guan
- Kashgar Hospital Affiliated to Sun Yat-sen University, Xinjiang, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China
- Department of Ophthalmology, the First People’s Hospital of Kashi, Xinjiang, China
| | - Yun-Cheng Ma
- Kashgar Hospital Affiliated to Sun Yat-sen University, Xinjiang, China
- Department of Ophthalmology, the First People’s Hospital of Kashi, Xinjiang, China
| | - Ying-Ting Zhu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China
| | - Ling-Ling Xie
- Kashgar Hospital Affiliated to Sun Yat-sen University, Xinjiang, China
- Department of Ophthalmology, the First People’s Hospital of Kashi, Xinjiang, China
| | - Mireayi Aizezi
- Kashgar Hospital Affiliated to Sun Yat-sen University, Xinjiang, China
- Department of Ophthalmology, the First People’s Hospital of Kashi, Xinjiang, China
| | - Ye-Hong Zhuo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China
| | - Aizezi Wumaier
- Kashgar Hospital Affiliated to Sun Yat-sen University, Xinjiang, China
- Department of Ophthalmology, the First People’s Hospital of Kashi, Xinjiang, China
- *Correspondence: Aizezi Wumaier, Kashgar Hospital Affiliated to Sun Yat-sen University, The First People’s Hospital of Kashi, No.120 Yingbin Avenue, Kashi, Xinjiang 844000, China (e-mail: )
| |
Collapse
|
10
|
Yuan NN, Xu HB, Liu SC, Wang Y, Wang T, Yi TC, Chen J, Zhang Y, Zhu YT, Li LJ, Li JP, Cao JJ, Huang W. [Impact of exposure to ambient fine particulate matter-bound polycyclic aromatic hydrocarbons on blood thrombogenicity in adults]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:902-911. [PMID: 35899341 DOI: 10.3760/cma.j.cn112150-20210924-00923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the effects of exposure to ambient fine particulate matter-bound polycyclic aromatic hydrocarbons on blood coagulation in adults. Methods: A total of 73 adult volunteers were recruited in a cohort study and had four clinical visits from November 2014 to January 2016. Blood samples were obtained and used to measure biomarkers of blood thrombogenicity, including soluble CD40 Ligand (sCD40L), soluble P-selection (sCD62P) and Fibrinogen (FIB). White blood cell (WBC), 8-Hydroxy-2'-Deoxyguanosine (8-OHdG), matrix metalloproteinase-2 (MMP-2) and HDL cholesterol efflux capacity (HDL-CEC) were also determined. Daily concentrations of ambient fine particulate matter-bound polycyclic aromatic hydrocarbons (PAHs) were measured throughout the study period, and positive matrix factorization (PMF) approach was used to identity PAHs sources. Linear mixed-effect models including single-pollutant model, two-pollutant model and stratification analysis were constructed to estimate the effects of exposure to ambient fine particulate matter-bound PAHs on blood thrombogenicity in adults after adjusting for potential confounders. Results: The mean age of participants was (23.3±5.4) years. During the study period, the median level of PM2.5-bound PAHs was (55.29±74.99) ng/m3. Six sources of PM2.5-bound PAHs were identified by PMF, with traffic sources contributing more than 50%. The linear mixed-effect model showed that PAHs exposure had a significant effect on elevated blood thrombogenicity. Significant elevations in sCD40L, sCD62P and FIB associated with per IQR increase (60.33 ng/m3) in exposure to PAHs were 14.36% (95%CI:6.94%-22.28%), 9.33% (95%CI: 1.71%-17.51%) and 2.07% (95%CI:0.44%-2.07%) at prior 5 days, respectively. Blood thrombogenicity levels were significantly and positively correlated with source-specific PAHs, especially gasoline vehicle emissions, diesel vehicle emission and coal burning at prior 1 or 5 days. Stronger associations between PAHs and increased blood thrombogenicity were found in participants with high plaque vulnerability, reduced HDL function, and high levels of inflammation and oxidative stress. Conclusion: Acute exposure to ambient fine particulate matter-bound PAHs, especially PAHs from traffic sources may promote blood thrombogenicity in adults, and PAHs have stronger effects on participants with reduced vascular function and high levels of inflammation and oxidative stress.
Collapse
Affiliation(s)
- N N Yuan
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - H B Xu
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - S C Liu
- Division of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Y Wang
- Department of Prevention and Health Care, Hospital of Health Science Center, Peking University, Beijing 100191, China
| | - T Wang
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - T C Yi
- Division of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - J Chen
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - Y Zhang
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - Y T Zhu
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - L J Li
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - J P Li
- Division of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - J J Cao
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - W Huang
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| |
Collapse
|
11
|
Guan JY, Zhu YT, Zhuo YH. [Research advances in the pathogenesis of exfoliative glaucoma]. Zhonghua Yan Ke Za Zhi 2022; 58:58-62. [PMID: 34979796 DOI: 10.3760/cma.j.cn112142-20210217-00090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Exfoliative glaucoma is a type of glaucoma secondary to pseudoexfoliation syndrome. In recent years, great progress has been made in the research of pathogenesis and risk factors of exfoliative glaucoma. A variety of risk genes, abnormal growth factors and cytokines, changes in the anterior and posterior segments have been found. Based on the systematic summary of these achievements, this article points out the problems that need to be further studied, so as to provide a reference for future research in this field.
Collapse
Affiliation(s)
- J Y Guan
- Zhongshan Ophthalmic Centre, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangzhou 510060, China
| | - Y T Zhu
- Zhongshan Ophthalmic Centre, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangzhou 510060, China
| | - Y H Zhuo
- Zhongshan Ophthalmic Centre, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangzhou 510060, China
| |
Collapse
|
12
|
Qian CX, Chen Q, Cun Q, Tao YJ, Yang WY, Yang Y, Hu ZY, Zhu YT, Zhong H. Comparison of the SITA Faster-a new visual field strategy with SITA Fast strategy. Int J Ophthalmol 2021; 14:1185-1191. [PMID: 34414082 DOI: 10.18240/ijo.2021.08.08] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 03/05/2021] [Indexed: 11/23/2022] Open
Abstract
AIM To compare visual field defects using the Swedish Interactive Thresholding Algorithm (SITA) Fast strategy with SITA Faster strategy, a newly developed time-saving threshold visual field strategy. METHODS Ninety-three participants (60 glaucoma patients and 33 normal controls) were enrolled. One eye from each participant was selected randomly for the study. SITA Fast and SITA Faster were performed using the 24-2 default mode for each test. The differences of visual field defects between the two strategies were compared using the test duration, false-positive response errors, mean deviation (MD), visual field index (VFI) and the numbers of depressed test points at the significant levels of P<5%, <2%, <1%, and <0.5% in probability plots. The correlation between strategies was analyzed. The agreement between strategies was acquired by Bland-Altman analysis. RESULTS Mean test durations were 246.0±60.9s for SITA Fast, and 156.3±46.3s for SITA Faster (P<0.001). The test duration of SITA Faster was 36.5% shorter than SITA Fast. The MD, VFI and numbers of depressed points at P<5%, <2%, <1%, and <0.5% in probability plots showed no statistically significant difference between two strategies (P>0.05). Correlation analysis showed a high correlation for MD (r=0.986, P<0.001) and VFI (r=0.986, P<0.001) between the two strategies. Bland-Altman analysis showed great agreement between the two strategies. CONCLUSION SITA Faster, which saves considerable test time, has a great test quality comparing to SITA Fast, but may be not directly interchangeable.
Collapse
Affiliation(s)
- Chao-Xu Qian
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| | - Qin Chen
- The First Affiliated Hospital of Nanjing Medical University, Nanjing 210000, Jiangsu Province, China
| | - Qing Cun
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| | - Yi-Jin Tao
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| | - Wen-Yan Yang
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| | - Yue Yang
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| | - Zhong-Yin Hu
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| | - Ying-Ting Zhu
- Tissue Tech, Inc., 7300 Corporate Center Drive, Suite B, Miami, FL 33126, USA
| | - Hua Zhong
- The First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
| |
Collapse
|
13
|
Liu D, Guo ZQ, Tian E, Zhu YT, Xu WC, Zhang SL. [Efficacy of multisensory training and rehabilitation in patients with balance disorders]. Zhonghua Yi Xue Za Zhi 2021; 101:2050-2054. [PMID: 34275237 DOI: 10.3760/cma.j.cn112137-20210116-00143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the clinical efficacy of multisensory training and rehabilitation treatment in patients with balance disorders. Methods: From January to December 2020, 95 patients with balance disorders in the Vertigo Center of Department of Otorhinolaryngology, Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology were enrolled. All patients were treated according to the treatment guidelines of Chinese Medical Association or expert consensus. Those with poor recovery or unsatisfactory treatment results underwent multisensory training and rehabilitation for 1 month after a comprehensive evaluation. The scores of Visual Analogue Scale (VAS), Dizziness Handicap Inventory (DHI), Berg Balance Scale (BBS), and Activities-specific Balance Confidence Scale (ABC), Somatization Symptom Self-Rating Scale (SSS), 9-item Patient Health Questionnaire (PHQ9) and the 7-item Generalized Anxiety Disorder (GAD7) were evaluated and compared before and after the treatment. Results: Totally, 95 patients were enrolled. There were 34 males and 61 females, aged (44±14) years. VAS (2.1±1.1 vs 5.9±2.5, P<0.01), DHI (15.6±7.7 vs 33.1±13.2, P<0.01), SSS (1.5±0.6 vs 2.4±0.8, P<0.01), PHQ9 (6.0±2.7 vs 8.6±4.3, P=0.01) and GAD7 (5.2±2.6 vs 9.5±2.8, P<0.01) decreased after treatment, while BBS (53.4±10.0 vs 34.8±10.7, P<0.01) and ABC (89.6±8.0 vs 55.7±21.8, P<0.01) increased. Conclusion: Multisensory training and rehabilitation therapy can effectively enhance the vertigo control rate and balance ability in patients with balance disorders, reduce the risk of falling, promote their mental and psychological state, and thus improve the quality of life.
Collapse
Affiliation(s)
- D Liu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Z Q Guo
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - E Tian
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Y T Zhu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - W C Xu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - S L Zhang
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| |
Collapse
|
14
|
Zhu Q, Xiao S, Hua Z, Yang D, Hu M, Zhu YT, Zhong H. Near Infrared (NIR) Light Therapy of Eye Diseases: A Review. Int J Med Sci 2021; 18:109-119. [PMID: 33390779 PMCID: PMC7738953 DOI: 10.7150/ijms.52980] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 10/15/2020] [Indexed: 12/18/2022] Open
Abstract
Near infrared (NIR) light therapy, or photobiomodulation therapy (PBMT), has gained persistent worldwide attention in recent years as a new novel scientific approach for therapeutic applications in ophthalmology. This ongoing therapeutic adoption of NIR therapy is largely propelled by significant advances in the fields of photobiology and bioenergetics, such as the discovery of photoneuromodulation by cytochrome c oxidase and the elucidation of therapeutic biochemical processes. Upon transcranial delivery, NIR light has been shown to significantly increase cytochrome oxidase and superoxide dismutase activities which suggests its role in inducing metabolic and antioxidant beneficial effects. Furthermore, NIR light may also boost cerebral blood flow and cognitive functions in humans without adverse effects. In this review, we highlight the value of NIR therapy as a novel paradigm for treatment of visual and neurological conditions, and provide scientific evidence to support the use of NIR therapy with emphasis on molecular and cellular mechanisms in eye diseases.
Collapse
Affiliation(s)
- Qin Zhu
- Department of Ophthalmology, the First Affiliated Hospital of Kunming Medical University, Kunming 650031, China
| | - Shuyuan Xiao
- Department of Ophthalmology, the First Affiliated Hospital of Kunming Medical University, Kunming 650031, China
| | - Zhijuan Hua
- Department of Ophthalmology, the First Affiliated Hospital of Kunming Medical University, Kunming 650031, China
| | - Dongmei Yang
- Department of Ophthalmology, the Second People's Hospital of Yunnan Province, Kunming 650021, China
| | - Min Hu
- Department of Ophthalmology, the Second People's Hospital of Yunnan Province, Kunming 650021, China
| | | | - Hua Zhong
- Department of Ophthalmology, the First Affiliated Hospital of Kunming Medical University, Kunming 650031, China
| |
Collapse
|
15
|
Zhu YT, Li F, Zhang Y, Chen SY, Tighe S, Lin SY, Tseng SCG. HC-HA/PTX3 Purified From Human Amniotic Membrane Reverts Human Corneal Fibroblasts and Myofibroblasts to Keratocytes by Activating BMP Signaling. Invest Ophthalmol Vis Sci 2020; 61:62. [PMID: 32462202 PMCID: PMC7405802 DOI: 10.1167/iovs.61.5.62] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Purpose Fibrosis or scarring is a pathological outcome of wound healing and is characterized by terminally differentiated myofibroblasts. Heavy chain-hyaluronic acid/pentraxin 3 (HC-HA/PTX3) is a unique matrix component purified from amniotic membrane that exerts an anti-inflammatory effect. Herein, we investigate whether HC-HA/PTX3 can also exert an antiscarring effect. Methods Human corneal fibroblasts and myofibroblasts were seeded on plastic, immobilized HA or HC-HA/PTX3 or on plastic with or without soluble HA and HC-HA/PTX3 in DMEM+10% FBS, with or without AMD3100 or SB431542 in DMEM+ITS with or without transforming growth factor–β1 (TGF-β1). Transcript expression of keratocyte and signaling markers was determined by RT-qPCR. Immunostaining was performed to monitor cytolocalization of signaling markers and α-SMA. Western blotting was used to measure relative protein level. Results Human corneal fibroblasts and myofibroblasts cultured in or on HC-HA/PTX3, but not HA, were refrained from cytoplasmic expression of αSMA and nuclear translocation of pSMAD2/3 when challenged with exogenous TGF-β1. Such an antiscarring action by suppressing canonical TGF-β1 signaling was surprisingly accompanied by phenotypic reversal to keratocan-expressing keratocytes through activation of BMP signaling. Further investigation disclosed that such phenotypic reversal was initiated by cell aggregation mediated by SDF1-CXCR4 signaling highlighted by nuclear translocation of CXCR4 and upregulation of CXCR4 transcript and protein followed by activation of canonical BMP signaling. Conclusions These findings collectively provide mechanistic understanding explaining how amniotic membrane transplantation exerts an antiscarring action. In addition, HC-HA/PTX3 and derivatives may be developed into a new biologic to treat corneal blindness caused by stromal scar or opacity in the future.
Collapse
|
16
|
Wang Z, Zhang L, Ma J, Li Y, Liu XH, Guo L, Zhu YT, Han QX, Fan DY. [Short-term outcomes of modified load-sharing rip-stop repair compared with suture-bridge repair for large rotator cuff tears]. Zhonghua Wai Ke Za Zhi 2020; 58:631-635. [PMID: 32727196 DOI: 10.3760/cma.j.cn112139-20200304-00184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To examine the short-term outcomes of modified load-sharing rip-stop repair (mLSRS) and suture-bridge repair (SB) for large rotator cuff tear. Methods: The clinical data of patients who underwent shoulder arthroscopy for large rotator cuff repair at Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital from January 2017 to December 2018 were collected. Totally 111 patients (39 in mLSRS group and 72 in SB group) were included in the study. There were 45 males and 66 females, aged (58.0±6.9)years (range: 40 to 72 years).A total of 39 pairs of patients were successfully matched by propensity score matching. The pain of shoulder joint was assessed by visual analogy score (VAS) , the shoulder function was assessed by Constant-Murley score, the abduction strength of bilateral shoulder joint was assessed by 90˚ force assessment method of upper limb on the plane of scapula, and the healing of rotator cuff on the operative side was assessed by sugaya ultrasonic classification standard. The difference of short-term outcome between the two groups were compared using t test, χ(2) test, Mann-Whitney U test, repeated measures design anova and multivariate analysis of variance. Results: At the 4th week after surgery, the VAS of mLSRS group was significantly lower than SB group(1 (2) vs. 2 (2) , F=5.32, P=0.02). One year after surgery, Constant-Murley score of two groups were significantly higher than those before surgery, but there was no significant difference between two groups(89.1±5.7 vs. 87.6±7.3, t=1.00, P=0.32). Abductor strength of affected limbs were lower than that of the opposite side, but there were no statistically significant differences between two groups(4.28±1.61 vs. 4.54±1.64, t=-0.70, P=0.49). According to the Sugaya classification, 32 cases in mLSRS group were healed while 7 cases were not healed,30 cases in SB group were healed while 9 cases were not healed(χ(2)=0.32, P=0.58). Conclusion: The use of mLSRS fixation construct on large rotator cuff tear can reduce pain and the short-term outcome is reliable.
Collapse
Affiliation(s)
- Z Wang
- Beijing University of Chinese Medicine, Beijing 100029, China
| | - L Zhang
- Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital, Beijing 100102, China
| | - J Ma
- Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital, Beijing 100102, China
| | - Y Li
- Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital, Beijing 100102, China
| | - X H Liu
- Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital, Beijing 100102, China
| | - L Guo
- Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital, Beijing 100102, China
| | - Y T Zhu
- Department of Orthopedic, China Academy of Chinese Medical Sciences Wang Jing Hospital, Beijing 100102, China
| | - Q X Han
- Beijing University of Chinese Medicine, Beijing 100029, China
| | - D Y Fan
- Beijing University of Chinese Medicine, Beijing 100029, China
| |
Collapse
|
17
|
Li F, Jiang N, Zhu YT, Su WR, Zhuo YH. [Mechanism of microglia promoting retinal ganglion cell death in vitro]. Zhonghua Yan Ke Za Zhi 2020; 56:32-40. [PMID: 31937061 DOI: 10.3760/cma.j.issn.0412-4081.2020.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the role and mechanism of microglial activation in the process of retinal ganglion cell (RGC) death in the oxygen-glucose deprivation/reperfusion (OGD/R) model which mimicked retinal ischemia/reperfusion injury in vitro. Methods: Experimental study. Primary RGCs from C57BL/6 mice and BV2 microglia were co-cultured or cultured alone. The OGD/R model was established in vitro (reoxygenation time was set to 6 h, 24 h, 36 h, 48 h). BV2 microglial activation was assessed by immunofluorescence staining of ionized calcium binding adapter molecule 1 (iba1), and the survival rate of RGCs was detected by the Cell Counting Kit-8. The apoptosis rate of RGC was detected by using apoptosis detection kit. The levels of Toll-like receptor-4 (TLR4) and Nod-like receptor family pyrin domain containing protein 3 (NLRP3) in BV2 cells were detected by PCR, Western-blot and immunofluorescence staining. The activity of caspase-8 in BV2 cells was detected by the CaspGLOW Kit, and the content of interleukine-1β (IL-1β) in the supernatant was detected by enzyme linked immunosorbent assay. After the corresponding pathways were blocked by TLR4 small interfering RNA (siRNA) transfection or caspase-8 inhibitor, the expression changes of TLR4 and NLRP3, the activity of caspase-8, and the difference of IL-1β content could be observed as well as the activity of RGCs co-cultured with BV2. Statistical analysis was performed using analysis of variance. Results: Under co-culture of RGC and BV2 cells, cellular immunofluorescence detection showed that the expression of iba1 in BV2 cells increased, which indicated BV2 cells were activated significantly in the OGD/R model. In the OGD/R model, the apoptosis rate of RGC co-cultured with BV2 cells (71.1%±3.2%) was significantly higher than that of RGC cultured alone (35.1%±1.8%) (t=10.10, P<0.01). Cellular immunofluorescence detection showed that the expression of TLR4 and NLRP3 in BV2 cells in the OGD/R model increased significantly when BV2 cells were cultured alone, and their mRNA levels increased significantly with prolongation of reoxygenation time (F=64.45, 72.74; P<0.01), and peaked at OGD/R 24 h (TLR4 mRNA, relative ratio to control was 2.83±0.23; NLRP3 mRNA, relative ratio to control was 3.12±0.27). Caspase-8 activity also increased with prolonged reoxygenation time, the difference was statistically significant (F=93.57, P<0.01), and peaked at OGD/R 24 h (relative ratio to control was 2.92±0.31). After transfection of BV2 cells with TLR4 siRNA, its caspase-8 activity was significantly inhibited, but using caspase-8 inhibitor did not affect the up-regulation of TLR4 expression in BV2 cells. However, the mature IL-1β secreted by BV2 cells exposed to OGD/R was significantly reduced by using caspase-8 inhibitor (from 3.52±0.55 to 1.39±0.37, t=7.19, P<0.01), meanwhile, the expression of NLRP3 was also significantly decreased after caspase-8 inhibitor pretreatment (from 2.79±0.23 to 1.37±0.19, t=9.37, P<0.01). In the OGD/R model, the activity of RGC cells co-cultured with TLR4 siRNA-transfected BV2 cells was 74.5%±1.2%, and the activity of RGC cells co-cultured with BV2 cells treated with caspase-8 inhibitor was 62.8%±1.5%, those were both higher than that of RGC cells co-cultured with untreated BV2 cells (36.7%±0.3%), and the difference was statistically significant (t=11.60, 6.83; both P<0.01). Conclusion: TLR4-caspase-8-NLRP3 inflammasome pathway is activated in microglia exposed to OGD/R, resulting in the production of IL-1β, thereby contributing to the death of RGCs. (Chin J Ophthalmol, 2020, 56: 32-40).
Collapse
Affiliation(s)
- F Li
- Zhongshan Ophthalmic Center, Sun Yat-sen University, State Key Laboratory of Ophthalmology, Guangzhou510060, China, is now working at the Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | | | | | | | | |
Collapse
|
18
|
Abstract
Colorectal cancer is the third common cancer in this world, accounting for more than 1 million cases each year. However, detailed etiology and mechanism of colorectal cancer have not been fully understood. For example, cyclooxygenase-2 (COX-2) and its product prostaglandin E2 (PGE2) have been closely linked to its occurrence, progression and prognosis. However, the mechanisms on how COX-2 and PGE2-mediate the pathogenesis of colorectal cancer are obscure. In this review, we have summarized recent advances in studies of pathogenesis and control in colorectal cancer to assist further advances in the research for the cure of the cancer. In addition, the knowledge gained may also guide the audiences for reduction of the risk and control of this deadly disease.
Collapse
Affiliation(s)
- Juan Sheng
- Department of Gastroenterology, the Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
| | - Hong Sun
- The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Fu-Bing Yu
- Department of Gastroenterology, the Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
| | - Bo Li
- Department of General Surgery, The Second People's Hospital of Yunnan Province, Kunming, Yunnan 650021, China
| | - Yuan Zhang
- Tissue Tech Inc, Miami, Florida 33032, USA
| | | |
Collapse
|
19
|
Xie Z, Mu ZX, Du ML, Zhu YT, Sun H. Two-year outcome of Trabeculo-Canalectomy for Chinese Glaucoma Patients. Int J Med Sci 2020; 17:2024-2030. [PMID: 32788881 PMCID: PMC7415382 DOI: 10.7150/ijms.46729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/10/2020] [Indexed: 11/23/2022] Open
Abstract
To evaluate the efficacy of trabeculo-canalectomy in treating glaucoma patients, a retrospective investigation of 53 glaucoma patients (53 eyes) who underwent trabeculo-canalectomy was conducted at the First Affiliated Hospital of Nanjing Medical University, China, from April 2017 to January 2019. Intraocular pressure (IOP), visual acuity, surgical success rates, medications, and complications were monitored at post-operative 1 day, 1 week, 1, 3, 6, 12 and 24 months. Surgical success criteria were defined as 6 mm Hg≤IOP≤21 mmHg with or without additional medications. Our results showed that average IOP was statistically significant between pre-operative visit and each follow-up visit (all P <0.05). The total success rate of trabeculo-canalectomy at 1, 3, 6, 12 and 24 months was 92.5%, 86.8%, 94.3%, 92.5% and 90.6% respectively. After 3 months post-operatively, all patients had no obvious filtering blebs. The main early complications included postoperative hyphema (7.5%), elevated IOP (5.7%) and anterior chamber exudation (3.8%), which were all cured after conservative treatment. No blebitis, shallow anterior chamber, choroidal detachment and endophthalmitis were observed. Logistic regression analysis showed that patients with secondary glaucoma were more likely to undergo surgical failure 24 months post-operatively (P= 0.008). Thus, we conclude that trabeculo-canalectomy is effective and safe for the treatment of glaucoma.
Collapse
Affiliation(s)
- Zhan Xie
- Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Zhao-Xia Mu
- Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | - Mu-Long Du
- Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| | | | - Hong Sun
- Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province 210029, China
| |
Collapse
|
20
|
Zhou X, Zhu YT, Chu QJ, Wan PC, Ou Y, Quan S. [Effects and mechanism of lncRNA serving as ceRNA in non-obstructive azoospermia]. Zhonghua Yi Xue Za Zhi 2019; 99:2761-2767. [PMID: 31550799 DOI: 10.3760/cma.j.issn.0376-2491.2019.35.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the mechanisms of lncRNA on the occurrence and development of NOA by constructing ceRNA regulation network of lncRNA, miRNA and mRNA. Methods: Samples of adult human testis were obtained from NOA patients and OA patients with normal spermatogenesis (controls), recruited from the Reproductive Medicine Center of Nanfang Hospital from June 2017 to June 2018. Differentially expressed lncRNAs and mRNAs in testicular tissues from patients with NOA were identified by microarray analysis in previous association study. In this study, differentially expressed lncRNAs and mRNA were used to construct the ceRNA regulatory network in NOA and clarify the interaction relationship among lncRNA, miRNA and mRNA. GeneMANIA database was used to construct Protein-Protein Interaction (PPI) of the mRNAs in ceRNA regulatory network. WebGestalt toolkit was employed to perform gene function and pathway enrichment analyses of those coding genes. Finally, qRT-PCR and dual luciferase reporter system were employed for further experimental validation. Results: The ceRNA regulatory network of lncRNA, miRNA and mRNA consists of 21 nodes and 26 edges, of which 4 lncRNAs, 13 miRNAs and 4 mRNAs. 19 proteins were found to interact with the mRNA coding proteins in ceRNA regulatory network by PPI analysis. Gene oncology and KEGG pathway enrichment analyses indicate these coding genes were significantly enriched in pentose metabolic process and pentose phosphate pathway. Furthermore, lncRNA ANXA2P3 was found binding with miR-613 and miR-206 to inhibit mRNA TKT expression. Conclusion: lncRNAs exert an important role in the occurrence and development of NOA via ceRNA regulatory network, which could be used as new biomarkers for NOA treatment.
Collapse
Affiliation(s)
- X Zhou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, Nangfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | | | | | | | | | | |
Collapse
|
21
|
Chen SY, Cheng AMS, Zhang Y, Zhu YT, He H, Mahabole M, Tseng SCG. Pax 6 Controls Neural Crest Potential of Limbal Niche Cells to Support Self-Renewal of Limbal Epithelial Stem Cells. Sci Rep 2019; 9:9763. [PMID: 31278274 PMCID: PMC6611810 DOI: 10.1038/s41598-019-45100-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 05/23/2019] [Indexed: 12/31/2022] Open
Abstract
On ocular surface, corneal epithelial stem cells (SC) reside in limbus between cornea and conjunctiva. Pax6, an evolutionally conserved transcription factor essential for eye development, is expressed in post-natal corneal and limbal epithelia progenitors (LEPC) but not in underlying stroma. Because Pax6 is transiently expressed in developing corneal stroma and a subset of limbal and corneal stromal progenitors, we examined the role of Pax6 in limbal niche cells (LNC) in maintaining the phenotype of neural crest (NC) progenitors to support LEPC. Our results showed that nuclear Pax6 staining was found in freshly isolated LNC but not corneal stromal cells. Serial passaged LNC resulted in gradual loss of nuclear Pax6 (46 kDa) staining and neural crest progenitor status defined by the expression of embryonic SCs and NC markers, neurosphere formation, and differentiation into neurons, oligodendrocytes and astrocytes. Gain of function of 46 kDa Pax6 in late-passaged LNC resulted in nuclear Pax6 staining and promotion of the aforementioned NC progenitor status. In an in vitro reunion assay, early passaged LNC and late passaged LNC with overexpression of Pax6 inhibited the expression of corneal epithelial differentiation marker and promoted holoclone by LEPC. Therefore, expression of nuclear 46 kDa Pax6 in LNC plays an important developmental role in maintaining NC progenitor status to support self-renewal of corneal epithelial SCs in the limbal niche.
Collapse
Affiliation(s)
- Szu-Yu Chen
- R&D Department, Tissue Tech, Inc., Miami, FL, 33126, USA.,Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL33136, USA
| | - Anny M S Cheng
- Department of Ophthalmology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL33199, USA.,Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL, 33126, USA
| | - Yuan Zhang
- R&D Department, Tissue Tech, Inc., Miami, FL, 33126, USA
| | - Ying-Ting Zhu
- R&D Department, Tissue Tech, Inc., Miami, FL, 33126, USA
| | - Hua He
- R&D Department, Tissue Tech, Inc., Miami, FL, 33126, USA
| | - Megha Mahabole
- R&D Department, Tissue Tech, Inc., Miami, FL, 33126, USA
| | - Scheffer C G Tseng
- R&D Department, Tissue Tech, Inc., Miami, FL, 33126, USA. .,Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL, 33126, USA.
| |
Collapse
|
22
|
Yan ZC, Yang XJ, Chen HR, Deng SF, Zhu YT, Zhuo YH. Effects of chronic elevated intraocular pressure on parameters of optical coherence tomography in rhesus monkeys. Int J Ophthalmol 2019; 12:542-548. [PMID: 31024804 DOI: 10.18240/ijo.2019.04.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 10/09/2018] [Indexed: 11/23/2022] Open
Abstract
AIM To determine the progression of parameters from optical coherence tomography (OCT) in chronic elevated intraocular pressure (IOP) monkeys. METHODS A chronic elevated IOP model of rhesus monkeys was induced by laser photocoagulation. Representative OCT parameters, including the average and four-quadrant retinal nerve fiber layer (RNFL) thickness, and parameters from optic nerve head (ONH) analysis were collected before and after laser treatments biweekly for up to 28wk. The performance of each parameter for early progression detection was analyzed. The progressive trends toward elevated IOP were analyzed using a linear mixed-effects model. RESULTS There were 10 successfully maintained high IOP eyes in 7 monkeys. The follow-up time was 24±5.37wk. With cumulative IOP elevation, the cup area, rim area and C/D area ratio were statistically significantly changed as early as 2wk after elevated IOP induction (P<0.05). The quadrant RNFL thickness changed at 6wk after high IOP induction, and the superior and inferior RNFL thicknesses exhibited more obvious reductions than other quadrants. The average RNFL thickness was the last one to show a significant decrease at 8wk. CONCLUSION The parameters of ONH are most sensitive to elevated IOP in a primate glaucomatous model. These findings suggest that we should focus on those parameters instead of RNFL thickness in patients with elevated IOP, as they might present with earlier glaucomatous changes.
Collapse
Affiliation(s)
- Zhi-Chao Yan
- Department of Ophthalmology, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, Guangdong Province, China.,State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Xue-Jiao Yang
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong Province, China
| | - Hong-Rui Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Shui-Feng Deng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Ying-Ting Zhu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Ye-Hong Zhuo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| |
Collapse
|
23
|
Guo LY, Zheng SL, Li J, Zhu Q, Duan WH, Zhang Y, Zhu YT, Hu M. Phenotypic variability of SLC7A14 mutations in patients with inherited retinal dystrophy. Ophthalmic Genet 2019; 40:118-123. [PMID: 30924391 DOI: 10.1080/13816810.2019.1586964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Inherited retinal dystrophy (IRD) is a group of retinal disorders that are both clinically and genetically diverse, typically with loss of photoreceptor function. Herein, we aimed to identify the underlying genetic defect in IRD patients with mutations in the SLC7A14 gene. METHODS A targeted exome capture panel was applied for mutational screening of SLC7A14. Targeted exome sequencing (TES) was performed on 200 non-syndromic and unrelated autosomal recessive or sporadic IRD families. Candidate variants were validated by direct sequencing and further examined using bioinformatics analyses for determination of their potential effect. RESULTS We identified compound heterozygous missense mutations (c.988G>A, p.G330R; c.1970G>A, p.R657Q) in an autosomal recessive retinitis pigmentosa (RP) case and a homozygous mutation (c.988G>A, p.G330R) in a simplex case with Leber congenital amaurosis (LCA) in the SLC7A14 gene. Both G330R and R657Q were deleterious based on in silico predictive tools. Our proposed topological model of the SLC7A14 polypeptide suggested that both G330R and R657Q affected evolutionarily highly conserved amino acid residues in SLC7A14 that occurred in transmembrane helixes. Structural modeling revealed a broken arginine and aspartic acid connection between residues 657 and 406. CONCLUSIONS We applied TES to the molecular diagnosis of patients with IRD and for the first time identified SLC7A14 mutations in two unrelated families with RP and LCA separately. Our findings uniquely add the knowledge of the phenotypic variability of SLC7A14 mutations.
Collapse
Affiliation(s)
- Li-Yun Guo
- a Department of Ophthalmology, the Second People's Hospital of Yunnan Province , Kunming , China.,b Key Laboratory of Yunnan Province for the Prevention and Treatment of ophthalmology , Kunming , China.,c Department of Ophthalmology , Fourth Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Sui-Lian Zheng
- d Department of Ophthalmology, the Second Affiliated Hospital , Wenzhou Medical University , Wenzhou , China
| | - Jun Li
- a Department of Ophthalmology, the Second People's Hospital of Yunnan Province , Kunming , China.,b Key Laboratory of Yunnan Province for the Prevention and Treatment of ophthalmology , Kunming , China.,c Department of Ophthalmology , Fourth Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Qin Zhu
- a Department of Ophthalmology, the Second People's Hospital of Yunnan Province , Kunming , China.,b Key Laboratory of Yunnan Province for the Prevention and Treatment of ophthalmology , Kunming , China.,c Department of Ophthalmology , Fourth Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Wen-Hua Duan
- a Department of Ophthalmology, the Second People's Hospital of Yunnan Province , Kunming , China.,b Key Laboratory of Yunnan Province for the Prevention and Treatment of ophthalmology , Kunming , China.,c Department of Ophthalmology , Fourth Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Yuan Zhang
- e Research and Development Department , Tissue Tech, Inc , Miami , FL , USA
| | - Ying-Ting Zhu
- e Research and Development Department , Tissue Tech, Inc , Miami , FL , USA
| | - Min Hu
- a Department of Ophthalmology, the Second People's Hospital of Yunnan Province , Kunming , China.,b Key Laboratory of Yunnan Province for the Prevention and Treatment of ophthalmology , Kunming , China.,c Department of Ophthalmology , Fourth Affiliated Hospital of Kunming Medical University , Kunming , China
| |
Collapse
|
24
|
Chen J, Li Z, Zhang L, Ou S, Wang Y, He X, Zou D, Jia C, Hu Q, Yang S, Li X, Li J, Wang J, Sun H, Chen Y, Zhu YT, Tseng SCG, Liu Z, Li W. Descemet's Membrane Supports Corneal Endothelial Cell Regeneration in Rabbits. Sci Rep 2017; 7:6983. [PMID: 28765543 PMCID: PMC5539296 DOI: 10.1038/s41598-017-07557-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 06/28/2017] [Indexed: 12/13/2022] Open
Abstract
Descemet’s membrane (DM) helps maintain phenotype and function of corneal endothelial cells under physiological conditions, while little is known about the function of DM in corneal endothelial wound healing process. In the current study, we performed in vivo rabbit corneal endothelial cell (CEC) injury via CEC scraping, in which DM remained intact after CECs removal, or via DM stripping, in which DM was removed together with CECs. We found rabbit corneas in the CEC scraping group healed with transparency restoration, while there was posterior fibrosis tissue formation in the corneas after DM stripping on day 14. Following CEC scraping on day 3, cells that had migrated toward the central cornea underwent a transient fibrotic endothelial-mesenchymal transition (EMT) which was reversed back to an endothelial phenotype on day 14. However, in the corneas injured via DM stripping, most of the cells in the posterior fibrosis tissue did not originate from the corneal endothelium, and they maintained fibroblastic phenotype on day 14. We concluded that corneal endothelial wound healing in rabbits has different outcomes depending upon the presence or absence of Descemet’s membrane. Descemet’s membrane supports corneal endothelial cell regeneration in rabbits after endothelial injury.
Collapse
Affiliation(s)
- Jingyao Chen
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China.,Yan'an Hospital of Kunming Medical University, Kunming, Yunnan, China
| | - Zhiyuan Li
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China.,The Affiliated Hospital of Southern Medicine University in Chenzhou, Chenzhou, Hunan, China
| | - Liying Zhang
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Shangkun Ou
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Xiamen University affiliated Xiamen Eye Center, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Yanzi Wang
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Xin He
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Xiamen University affiliated Xiamen Eye Center, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Dulei Zou
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China.,Shandong Eye Hospital, Shandong Eye Institute, Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Changkai Jia
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Qianqian Hu
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Shu Yang
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Xian Li
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Juan Li
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Junqi Wang
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Huimin Sun
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | - Yongxiong Chen
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China
| | | | | | - Zuguo Liu
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China. .,Xiamen University affiliated Xiamen Eye Center, Xiamen, Fujian, China. .,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China.
| | - Wei Li
- Eye Institute of Xiamen University, Xiamen University Medical College, Xiamen, Fujian, China. .,Xiamen University affiliated Xiamen Eye Center, Xiamen, Fujian, China. .,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian, China.
| |
Collapse
|
25
|
Hong WJ, Zheng BJ, Qian JF, Wu H, Jin H, Zhu YT. [Modification factors associated with maternally inherited non-syndromic hearing loss]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017. [PMID: 28635225 DOI: 10.3760/cma.j.issn.1673-0860.2017.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Mutations in the mitochondrial DNA have been certified to be one of the most important causes of maternally inherited sensorineural hearing loss. Among these, mitochondrial 12S rRNA1555A>G, 1494C>T and other mutations are associated with both nonsyndromic and drug induced hearing loss caused by aminoglycosides. Individuals carrying 1555A>G or 1494C>T mutation have a variety of clinical manifestations, which implies that the 1555A>G or 1494C>T mutation is a chief factor underlying the development of deafness but insufficient to produce the clinical phenotype. Therefore other modifier factors, such as aminoglycosides, mitochondrial haplotypes, secondary mutation or nuclear modifier genes, may play an important role in the phenotypic expression of the deafness-associated mitochondrial 12S rRNA1555A>G or 1494C>T mutation. In this review, the modifier factors for the phenotypic expression of deafness-associated mitochondrial 12S rRNA1555A>G or 1494C>T mutations were summarized and proposed the pathogenesis of maternally inherited deafness.
Collapse
Affiliation(s)
- W J Hong
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - B J Zheng
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - J F Qian
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - H Wu
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - H Jin
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Y T Zhu
- Department of Otorhinolaryngology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| |
Collapse
|
26
|
He H, Kuriyan AE, Su CW, Mahabole M, Zhang Y, Zhu YT, Flynn HW, Parel JM, Tseng SCG. Inhibition of Proliferation and Epithelial Mesenchymal Transition in Retinal Pigment Epithelial Cells by Heavy Chain-Hyaluronan/Pentraxin 3. Sci Rep 2017; 7:43736. [PMID: 28252047 PMCID: PMC5333089 DOI: 10.1038/srep43736] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 01/30/2017] [Indexed: 01/15/2023] Open
Abstract
Proliferative vitreoretinopathy (PVR) is mediated by proliferation and epithelial mesenchymal transition (EMT) of retinal pigment epithelium (RPE). Because heavy chain-hyaluronic acid/pentraxin 3 (HC-HA/PTX3) purified from human amniotic membrane exerts anti-inflammatory and anti-scarring actions, we hypothesized that HC-HA/PTX3 could inhibit these PVR-related processes in vitro. In this study, we first optimized an ARPE-19 cell culture model to mimic PVR by defining cell density, growth factors, and cultivation time. Using this low cell density culture model and HA as a control, we tested effects of HC-HA/PTX3 on the cell viability (cytotoxicity), proliferation (EGF + FGF-2) and EMT (TGF-β1). Furthermore, we determined effects of HC-HA/PTX3 on cell migration (EGF + FGF-2 + TGF-β1) and collagen gel contraction (TGF-β1). We found both HA and HC-HA/PTX3 were not toxic to unstimulated RPE cells. Only HC-HA/PTX3 dose-dependently inhibited proliferation and EMT of stimulated RPE cells by down-regulating Wnt (β-catenin, LEF1) and TGF-β (Smad2/3, collagen type I, α-SMA) signaling, respectively. Additionally, HA and HC-HA/PTX3 inhibited migration but only HC-HA/PTX3 inhibited collagen gel contraction. These results suggest HC-HA/PTX3 is a non-toxic, potent inhibitor of proliferation and EMT of RPE in vitro, and HC-HA/PTX3’s ability to inhibit PVR formation warrants evaluation in an animal model.
Collapse
Affiliation(s)
- Hua He
- TissueTech, Inc., Miami, FL, 33173, USA
| | - Ajay E Kuriyan
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, 33136, USA.,Flaum Eye Institute, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | | | | | - Yuan Zhang
- Ocular Surface Center and Ocular Surface Research &Education Foundation, Miami, FL, 33173, USA
| | | | - Harry W Flynn
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Jean-Marie Parel
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Scheffer C G Tseng
- TissueTech, Inc., Miami, FL, 33173, USA.,Ocular Surface Center and Ocular Surface Research &Education Foundation, Miami, FL, 33173, USA
| |
Collapse
|
27
|
Su CW, Zhang Y, Zhu YT. Stromal COX-2 signaling are correlated with colorectal cancer: A review. Crit Rev Oncol Hematol 2016; 107:33-38. [PMID: 27823649 DOI: 10.1016/j.critrevonc.2016.08.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/04/2016] [Accepted: 08/23/2016] [Indexed: 12/20/2022] Open
Abstract
Cyclooxygenase-2 (COX-2) and its product prostaglandin E2 (PGE2) play a critical role in development and progression of colorectal cancer. Yet the detailed mechanistic pathways of COX-2 mediated signaling are still controversial and the role of COX-2 interaction in epithelial-stromal compartments on colorectal carcinogenesis is not well-understood either. In this review, we provide experimental evidence to support that (1) COX-2 signaling plays a major role in development and progression of colorectal cancer; (2) Stromal fibroblasts are a major source of COX-2 and PGE2; (3) Stromal-epithelial interaction mediated by COX-2 signaling promotes colorectal carcinogenesis and (4) Inhibition of stromal COX-2 signaling is necessary to control colorectal cancer. In conclusion, the evidences summarized in the review reflect recent advances and insight in mechanistic studies of colorectal cancer which can help the audiences to further understand the etiology and the control of this disease.
Collapse
Affiliation(s)
- Chen-Wei Su
- R&D Department, TissueTech, Inc., Ocular Surface Center, Ocular Surface Research & Education Foundation, Miami, FL, USA
| | - Yuan Zhang
- Dalian Central Hospital, Dalian City, Liaoning Province, China
| | - Ying-Ting Zhu
- R&D Department, TissueTech, Inc., Ocular Surface Center, Ocular Surface Research & Education Foundation, Miami, FL, USA.
| |
Collapse
|
28
|
Liu X, Tseng SCG, Zhang MC, Chen SY, Tighe S, Lu WJ, Zhu YT. LIF-JAK1-STAT3 signaling delays contact inhibition of human corneal endothelial cells. Cell Cycle 2016; 14:1197-206. [PMID: 25695744 DOI: 10.1080/15384101.2015.1013667] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Human corneal endothelial cells (HCECs) responsible for corneal transparency have limited proliferative capacity in vivo because of "contact-inhibition." This feature has hampered the ability to engineer HCECs for transplantation. Previously we have reported an in vitro model of HCECs in which contact inhibition was re-established at Day 21, even though cell junction and cell matrix interaction were not perturbed during isolation. Herein, we observe that such HCEC monolayers continue to expand and retain a normal phenotype for 2 more weeks if cultured in a leukemia inhibitory factor (LIF)-containing serum-free medium. Such expansion is accompanied initially by upregulation of Cyclin E2 colocalized with nuclear translocation of phosphorylated retinoblastoma tumor suppressor (p-Rb) at Day 21 followed by a delay in contact inhibition through activation of LIF-Janus kinase1 (JAK1)-signal transducer and activator of transcription 3 (STAT3) signaling at Day 35. The LIF-JAK1-STAT3 signaling is coupled with upregulation of E2F2 colocalized with nuclear p-Rb and with concomitant downregulation of p16(INK4a), of which upregulation is linked to senescence. Hence, activation of LIF-JAK1-STAT3 signaling to delay contact inhibition can be used as another strategy to facilitate engineering of HCEC grafts to solve the unmet global shortage of corneal grafts.
Collapse
Key Words
- BMP, bone morphogenetic protein
- BrdU, bromodeoxyuridine
- CDK, cyclin-dependent kinase
- CKI, cyclin-dependent kinase inhibitors
- DMEM, Dulbecco's modified Eagle's medium
- E2F2
- EDTA, ethylenediaminetetraacetic acid
- EGF, epidermal growth factor
- EMT, endothelial mesenchymal transition
- ESC, embryonic stem cell
- FBS, fetal bovine serum
- GAPDH, glyceraldehyde-3- phosphate dehydrogenase
- HBSS, Hanks’ balanced salt solution
- HCEC, human corneal endothelial cell
- ID, inhibitor of differentiation
- ITS, insulin-transferrin-sodium selenite
- JAK, Janus kinase
- JAK1
- LEF1, lymphoid enhancer-binding factor 1
- LIF
- LIF, leukemia inhibitory factor
- MESCM, modified embryonic stem cell medium
- NC, neural crest
- NFkB, nuclear factor kappa-light-chain-enhancer of activated B cells
- PBS, phosphate-buffered saline
- RPE, retinal pigment epithelial cells
- Rb, retinoblastoma tumor suppressor
- SHEM, supplemental hormonal epithelial medium
- STAT3
- STAT3, signal transducer and activator of transcription 3
- ZO-1, Zona occludens protein 1
- bFGF, basic fibroblast growth factor
- contact inhibition
- corneal endothelium
- iPSCs, induced pluripotent stem cells
- p120, p120 catenin
- p16INK4a
- proliferation
- scRNA, scramble RNA
- siRNA, small interfering ribonucleic acid
Collapse
Affiliation(s)
- Xin Liu
- a Department of Ophthalmology; Union Hospital; Tongji Medical College ; Huazhong University of Science and Technology ; Wuhan , China
| | | | | | | | | | | | | |
Collapse
|
29
|
Xie XM, Ke R, Zhang YH, Wang GZ, Zhu YT, Hussian T, Yang L, Li MX. Interleukin-6 gene -174G>C polymorphism and chronic obstructive pulmonary disease risk: a meta-analysis. Genet Mol Res 2015; 14:8516-25. [PMID: 26345781 DOI: 10.4238/2015.july.28.21] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Association studies of interleukin-6 (IL-6) -174G>C polymorphism and chronic obstructive pulmonary disease (COPD) have yielded inconsistent results, possibly because single studies often lack sufficient statistical power. A comprehensive search was performed in the PubMed, Embase, Elsevier, Web of Science databases, Wanfang, and the Chinese National Knowledge Infrastructure (CNKI) databases for published studies investigating the associations between IL-6 -174G>C polymorphism and COPD. Odds ratios (OR) and 95% confidence intervals (95%CI) were used to assess the possible associations. Seven studies with a total of 2701 subjects were included in this meta-analysis. A significantly increased risk was detected in the C allele of the IL-6 -174G>C in Caucasians (C vs G: OR = 1.16, 95%CI = 1.03-1.30; CC+GC vs GG: OR = 1.21, 95%CI = 1.02-1.42; CC vs GG: OR = 1.32, 95%CI = 1.03-1.70). This meta-analysis suggests that the C allele of the IL-6 -174G>C might act as a COPD risk factor in Caucasians. Further well-designed case-control studies with larger sample sizes are needed to confirm these conclusions.
Collapse
Affiliation(s)
- X M Xie
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - R Ke
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Y H Zhang
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - G Z Wang
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Y T Zhu
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - T Hussian
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - L Yang
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - M X Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| |
Collapse
|
30
|
Chen SY, Han B, Zhu YT, Mahabole M, Huang J, Beebe DC, Tseng SCG. HC-HA/PTX3 Purified From Amniotic Membrane Promotes BMP Signaling in Limbal Niche Cells to Maintain Quiescence of Limbal Epithelial Progenitor/Stem Cells. Stem Cells 2015; 33:3341-55. [PMID: 26148958 DOI: 10.1002/stem.2091] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 05/08/2015] [Accepted: 05/23/2015] [Indexed: 12/13/2022]
Abstract
To explore how limbal niche cells (LNCs) may control quiescence, self-renewal, and corneal epithelial lineage commitment/differentiation of limbal epithelial progenitor/stem cells (LEPCs), we have established an in vitro sphere assay by reunion between the two cell types in three-dimensional Matrigel. The resultant sphere exhibits inhibition of corneal epithelial lineage commitment/differentiation and marked clonal growth of LEPCs, of which the latter is correlated with activation of canonical Wnt signaling. Herein, we have created a similar reunion assay in immobilized heavy chain-hyaluronic acid/pentraxin 3 (HC-HA/PTX3), which is purified from amniotic membrane (AM) and consists of a complex formed by hyaluronic covalently linked to heavy chain 1 of inter-α-inhibitor and noncovalently linked to pentraxin 3. The resultant spheres exhibited similar suppression of corneal epithelial lineage commitment/differentiation but upregulation of quiescence markers including nuclear translocation of Bmi-1, and negligible clonal growth of LEPCs. This outcome was correlated with the suppression of canonical Wnt but activation of noncanonical (Planar cell polarity) Wnt signaling as well as BMP signaling in both LEPCs and LNCs. The activation of BMP signaling in LNCs was pivotal because nuclear translocation of pSmad1/5/8 was prohibited in hLEPCs when reunioned with mLNCs of conditionally deleted Bmpr1a;Acvr1(DCKO) mice. Furthermore, ablation of BMP signaling in LEPCs led to upregulation of cell cycle genes, downregulation of Bmi-1, nuclear exclusion of phosphorylated Bmi-1, and marked promotion of the clonal growth of LEPCs. Hence, HC-HA/PTX3 uniquely upregulates BMP signaling in LNCs which leads to BMP signaling in LEPCs to achieve quiescence, helping explain how AM transplantation is clinically useful to be used as a matrix for ex vivo expansion of LEPCs and to treat corneal blindness caused by limbal stem cells deficiency.
Collapse
Affiliation(s)
- Szu-Yu Chen
- R&D Department, TissueTech, Inc., Miami, Florida, USA
| | - Bo Han
- Ocular Surface Research & Education Foundation, Miami, Florida, USA.,Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Ying-Ting Zhu
- R&D Department, TissueTech, Inc., Miami, Florida, USA
| | | | - Jie Huang
- Department of Ophthalmology and Visual Sciences, Washington University, St. Louis, Missouri, USA
| | - David C Beebe
- Department of Ophthalmology and Visual Sciences, Washington University, St. Louis, Missouri, USA
| | - Scheffer C G Tseng
- R&D Department, TissueTech, Inc., Miami, Florida, USA.,Ocular Surface Research & Education Foundation, Miami, Florida, USA
| |
Collapse
|
31
|
Abstract
Human corneal endothelial cells (HCEC) play a pivotal role in maintaining corneal transparency. Unlike in other species, HCEC are notorious for their limited proliferative capacity in vivo after diseases, injury, aging, and surgery. Persistent HCEC dysfunction leads to sight-threatening bullous keratopathy with either an insufficient cell density or retrocorneal membrane due to endothelial-mesenchymal transition (EMT). Presently, the only solution to restore vision in eyes inflicted with bullous keratopathy or retrocorneal membrane relies upon transplantation of a cadaver human donor cornea containing a healthy corneal endothelium. Due to a severe global shortage of donor corneas, in conjunction with an increasing trend toward endothelial keratoplasty, it is opportune to develop a tissue engineering strategy to produce HCEC grafts. Prior attempts of producing these grafts by unlocking the contact inhibition-mediated mitotic block using trypsin-EDTA and culturing of single HCEC in a bFGF-containing medium run the risk of losing the normal phenotype to EMT by activating canonical Wnt signaling and TGF-β signaling. Herein, we summarize our novel approach in engineering HCEC grafts based on selective activation of p120-Kaiso signaling that is coordinated with activation of Rho-ROCK-canonical BMP signaling to reprogram HCEC into neural crest progenitors. Successful commercialization of this engineering technology will not only fulfill the global unmet need but also encourage the scientific community to re-think how cell-cell junctions can be safely perturbed to uncover novel therapeutic potentials in other model systems.
Collapse
Affiliation(s)
- Ying-Ting Zhu
- R&D Department, Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, 7000 SW 97 Ave #212, Miami, FL, 33173, USA
| | - Sean Tighe
- R&D Department, Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, 7000 SW 97 Ave #212, Miami, FL, 33173, USA
| | - Shuang-Ling Chen
- R&D Department, Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, 7000 SW 97 Ave #212, Miami, FL, 33173, USA
| | - Thomas John
- Department of Ophthalmology, Loyola University at Chicago, 2160 1 Ave, Maywood, IL 60153, USA
| | - Winston Y Kao
- Department of Ophthalmology, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH, 45220, USA
| | - Scheffer C G Tseng
- R&D Department, Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, 7000 SW 97 Ave #212, Miami, FL 33173, USA, Telephone: (305) 274-1299
| |
Collapse
|
32
|
Zhu YT, Li F, Han B, Tighe S, Zhang S, Chen SY, Liu X, Tseng SCG. Activation of RhoA-ROCK-BMP signaling reprograms adult human corneal endothelial cells. ACTA ACUST UNITED AC 2014; 206:799-811. [PMID: 25202030 PMCID: PMC4164941 DOI: 10.1083/jcb.201404032] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Activation of RhoA-ROCK-BMP signaling reprograms adult human corneal endothelial cells into neural crest–like progenitors, which effectively form corneal endothelial monolayers that may eliminate the need for corneal transplantation. Currently there are limited treatment options for corneal blindness caused by dysfunctional corneal endothelial cells. The primary treatment involves transplantation of healthy donor human corneal endothelial cells, but a global shortage of donor corneas necessitates other options. Conventional tissue approaches for corneal endothelial cells are based on EDTA-trypsin treatment and run the risk of irreversible endothelial mesenchymal transition by activating canonical Wingless-related integration site (Wnt) and TGF-β signaling. Herein, we demonstrate an alternative strategy that avoids disruption of cell–cell junctions and instead activates Ras homologue gene family A (RhoA)–Rho-associated protein kinase (ROCK)–canonical bone morphogenic protein signaling to reprogram adult human corneal endothelial cells to neural crest–like progenitors via activation of the miR302b-Oct4-Sox2-Nanog network. This approach allowed us to engineer eight human corneal endothelial monolayers of transplantable size, with a normal density and phenotype from one corneoscleral rim. Given that a similar signal network also exists in the retinal pigment epithelium, this partial reprogramming approach may have widespread relevance and potential for treating degenerative diseases.
Collapse
Affiliation(s)
- Ying-Ting Zhu
- TissueTech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL 33173
| | - Fu Li
- Pediatric Research Institute and Department of Pediatric Hematology, Qilu Children's Hospital, Shandong University, Jinan, Shandong 250022, People's Republic of China
| | - Bo Han
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, People's Republic of China
| | - Sean Tighe
- TissueTech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL 33173
| | - Suzhen Zhang
- TissueTech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL 33173
| | - Szu-Yu Chen
- TissueTech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL 33173
| | - Xin Liu
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, People's Republic of China
| | - Scheffer C G Tseng
- TissueTech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL 33173
| |
Collapse
|
33
|
Zhang S, Zhu YT, Chen SY, He H, Tseng SCG. Constitutive expression of pentraxin 3 (PTX3) protein by human amniotic membrane cells leads to formation of the heavy chain (HC)-hyaluronan (HA)-PTX3 complex. J Biol Chem 2014; 289:13531-42. [PMID: 24652286 DOI: 10.1074/jbc.m113.525287] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Heavy chain (HC)-hyaluronan (HA), a complex formed by the covalent linkage between HC1 from the inter-α-trypsin inhibitor (IαI) and HA, purified from the human amniotic membrane (AM), is responsible for the anti-inflammatory, antiscarring, and antiangiogenic actions of the AM. This HC-HA complex is produced by constitutive expression of TNF-stimulated gene 6 and endogenous production of IαI by AM cells. Pentraxin 3 (PTX3), a prototypic long pentraxin that plays a non-redundant role in innate immunity against selected pathogens, also helps stabilize HC-HA to ensure female fertility. Here we noted strong positive PTX3 staining in the AM epithelium and compact stroma. PTX3 was constitutively expressed and secreted by cultured AM epithelial and stromal cells and, further, greatly up-regulated by TNF and IL-1β. Using an agarose overlay to trap the HA-containing matrix, the HC-HA-PTX3 complex was formed, as analyzed by Western blot analysis, by AM cells but not human skin fibroblasts, despite being cultured in the presence of serum and TNF. However, exogenous PTX3 helps human skin fibroblasts form the HC-HA-PTX3 complex with an agarose overlay. Furthermore, PTX3 can be coimmunoprecipitated with the HC-HA complex from agarose-overlaid AM cell extracts by an anti-human IαI antibody. Such a HC-HA-PTX3 complex can be reconstituted in vitro and exhibit similar effects as those reported for AM HC-HA-PTX3 on polarization of M2 macrophages. The tight binding between PTX3 and AM HC-HA withstands four runs of CsCl ultracentrifugation in the presence of 4 m GnHCl. These results indicate that PTX3 is constitutively expressed and secreted by AM cells as an integral component of the AM HC-HA-PTX3 complex and contributes to the biological function of AM HC-HA-PTX3.
Collapse
|
34
|
Zhu YT, Han B, Li F, Chen SY, Tighe S, Zhang S, Tseng SCG. Knockdown of both p120 catenin and Kaiso promotes expansion of human corneal endothelial monolayers via RhoA-ROCK-noncanonical BMP-NFκB pathway. Invest Ophthalmol Vis Sci 2014; 55:1509-18. [PMID: 24474278 DOI: 10.1167/iovs.13-13633] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PURPOSE To determine the signaling pathway involved in expanding contact-inhibited human corneal endothelial cells (HCECs) using p120 and Kaiso small interfering RNAs (siRNAs). METHODS Expansion of HCEC monolayers on collagen IV in SHEM using p120 siRNA was optimized regarding various dosage, frequency, and starting date before being added Kaiso siRNA or various inhibitors of Rho, ROCK, NFκB, and TAK1. Phase contrast micrographs were used for monitoring cell shape, monolayer size, and cell density. Immunostaining was used to determine cytolocalization of BrdU, p120, pNFkB, F-actin, α-catenin, β-catenin, LEF1, Na+/K+-ATPase, N-cadherin, ZO-1, and S100A4. Western blotting was used to determine the protein level of RhoA and RhoA-guanosine-5'-triphosphate (GTP). RESULTS The HCEC monolayer size in diameter was expanded from 2.1 ± 0.4 mm to 4.3 ± 0.3 mm (P < 0.05) by increasing p120 siRNA from 40 nM to 100 nM starting at day 7, to 5.0 ± 0.4 mm (P < 0.05) by adding 100 nM Kaiso siRNA, to 6.8 ± 0.3 mm by using one-fourth corneoscleral rim (P < 0.05), and to 8.1 ± 0.5 mm by using one-half corneoscleral rim (P < 0.05). Such proliferative effect required activation of RhoA-ROCK-noncanonical bone morphogenic protein (BMP) signaling and nuclear translocation of phosphorylated nuclear factor kappa-light-chain-enhancer of activated B cells (pNFκB). After withdrawal of siRNAs for 1 week, the resultant HCEC monolayer maintained a hexagonal shape, the average cell density of 2254 ± 87 mm(2) (n = 3), and normal expression patterns of F-actin, α-catenin, β-catenin, N-cadherin, ZO-1, and Na+/K+-ATPase without S100A4 and alpha-smooth muscle actin (α-SMA). CONCLUSIONS The optimized knockdown with p120 and Kaiso siRNAs further expands the size of HCEC monolayers without endothelial mesenchymal transition (EMT) via selective activation of p120/Kaiso signaling that requires the RhoA-ROCK-noncanonical BMP-NFkB signaling.
Collapse
Affiliation(s)
- Ying-Ting Zhu
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, Florida
| | | | | | | | | | | | | |
Collapse
|
35
|
Han B, Chen SY, Zhu YT, Tseng SCG. Integration of BMP/Wnt signaling to control clonal growth of limbal epithelial progenitor cells by niche cells. Stem Cell Res 2014; 12:562-73. [PMID: 24530980 DOI: 10.1016/j.scr.2014.01.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 01/07/2014] [Accepted: 01/08/2014] [Indexed: 12/13/2022] Open
Abstract
Both BMP and Wnt signaling control stem cells in bulge/dermal papilla, intestinal crypt, and bone marrow. To explore their roles in the limbal niche, which govern corneal epithelial homeostasis, we established an in vitro model of sphere growth by reunion between single limbal epithelial progenitor cells (LEPCs) and aggregates of limbal niche cells (LNCs) in 3D Matrigel. Compared to LEPCs alone, spheres formed by LEPC+LNC exhibited higher clonal growth and less corneal epithelial differentiation. Furthermore, pSmad1/5/8 was in the nucleus of LEPCs, but not LNCs, and correlated with upregulation of BMP1, BMP3, BMP4, all three BMP receptors, and BMP target genes. Inactivation of BMP signaling in LNCs was correlated with upregulation of noggin preferentially expressed by LNCs. Additionally, β-catenin was stabilized in the perinuclear cytoplasm in LEPCs and correlated with upregulation of Wnt7A and FZD5 preferentially expressed by LEPCs. Inactivation of Wnt signaling in LNCs was correlated with upregulation of DKK1/2 by LNCs. Addition of XAV939 that expectedly downregulated perinuclear β-catenin in LEPCs led to significant reduction of epithelial clonal growth, but upregulated all three BMP receptors and downregulated LNC-derived noggin, resulting in activation of BMP signaling in LNCs. Addition of noggin that expectedly downregulated nuclear localization of pSmad1/5/8 in LEPCs led to nuclear localization of β-catenin in larger LEPCs but membrane relocation of β-catenin in smaller LEPCs and significant upregulation of DKK1/2. Hence, balancing acts between Wnt signaling and BMP signaling exist not only within LEPCs but also between LEPCs and LNCs to regulate clonal growth of LEPCs.
Collapse
Affiliation(s)
- Bo Han
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ocular Surface Research & Education Foundation, Miami, FL, USA
| | - Szu-Yu Chen
- R&D Department, TissueTech, Inc., Miami, FL, USA
| | | | - Scheffer C G Tseng
- R&D Department, TissueTech, Inc., Miami, FL, USA; Ocular Surface Center, Miami, FL, USA; Ocular Surface Research & Education Foundation, Miami, FL, USA.
| |
Collapse
|
36
|
Abstract
PURPOSE We investigated whether human limbal niche cells generate mesenchymal stem cells. METHODS Limbal niche cells were isolated from the limbal stroma by collagenase alone or following dispase removal of the limbal epithelium (D/C), and cultured on plastic in Dulbecco's modified Eagle's medium (DMEM) with 10% fetal bovine serum (FBS), or coated or three-dimensional Matrigel in embryonic stem cell medium with leukemia inhibitory factor and basic fibroblast growth factor. Expression of cell markers, colony-forming units-fibroblast, tri-lineage differentiation, and ability of supporting limbal epithelial stem/progenitor cells were compared to limbal residual stromal cells. RESULTS Stromal cells expressing angiogenesis markers were found perivascularly, subjacent to limbal basal epithelial cells, and in D/C and limbal residual stromal cells. When seeded in three-dimensional Matrigel, D/C but not limbal residual stromal cells yielded spheres of angiogenesis progenitors that stabilized vascular networks. Similar to collagenase-isolated cells, D/C cells could be expanded on coated Matrigel for more than 12 passages, yielding spindle cells expressing angiogenesis and mesenchymal stem cells markers, and possessing significantly higher colony-forming units-fibroblast and more efficient tri-lineage differentiation than D/C and limbal residual stromal cells expanded on plastic in DMEM with 10% FBS, of which both lost the pericyte phenotype while limbal residual stromal cells turned into myofibroblasts. Upon reunion with limbal epithelial stem/progenitor cells to form spheres, D/C cells expanded on coated Matrigel maintained higher expression of p63α and lower expression of cytokeratin 12 than those expanded on plastic in DMEM with 10% FBS, while spheres formed with human corneal fibroblasts expressed cytokeratin 12 without p63α. CONCLUSIONS In the limbal stroma, cells subjacent to limbal basal epithelial cells serve as niche cells, and generate progenitors with angiogenesis and mesenchymal stem cells potentials. They might partake in angiogenesis and regeneration during corneal wound healing.
Collapse
Affiliation(s)
- Gui-Gang Li
- Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | | | | | | | | |
Collapse
|
37
|
Guo P, Zhang SZ, He H, Zhu YT, Tseng SCG. PTX3 controls activation of matrix metalloproteinase 1 and apoptosis in conjunctivochalasis fibroblasts. Invest Ophthalmol Vis Sci 2012; 53:3414-23. [PMID: 22511625 DOI: 10.1167/iovs.11-9103] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Conjunctivochalasis (CCh) is an age-related inflammatory ocular surface disease manifesting redundant, loose conjunctiva folds. The pathogenic role of Pentraxin 3 (PTX3) in controlling upregulation of matrix metalloproteinase 1 (MMP-1) and MMP-3 in CCh remains undefined. METHODS Cytolocation of PTX3 and apoptosis were compared by immunostaining and terminal deoxyribonucleotidyl transferase-mediated FITC-linked dUTP nick-end DNA labeling (TUNEL) assay between normal and CCh specimens containing the conjunctiva and the Tenon. Second to third cultures of normal and CCh fibroblasts were treated with or without Aprotinin, Batimastat, or N-isobutyl-N-(4-methoxyphenylsulfonyl)-glycylhydroxamic acid (NNGH), followed by transfection with or without PTX3 siRNA, and TNF-α or IL-1β. Cell lysates and culture media were collected to assess apoptosis measured by the Cell Death Detection ELISA and expression of PTX3, MMP-1, and MMP-3 transcripts and proteins by quantitative RT-PCR and Western blot, respectively. RESULTS PTX3 immunostaining was negative in normal specimens, but strongly positive in the subconjunctival stroma of CCh specimens. More apoptotic cells were found in CCh samples than in normal specimens. Expression of PTX3 transcripts and protein was not constitutive in resting normal fibroblasts but was in resting CCh fibroblasts and was upregulated by IL-1β in both cell lysates and culture media of both fibroblasts. PTX3 siRNA further upregulated MMP-1 and MMP-3 transcripts in resting normal fibroblasts, but synergistically with IL-1β upregulated the expression of MMP-1 and MMP-3 transcripts only in CCh fibroblasts, with activation of MMP-1 more so than MMP-3. PTX3 siRNA knockdown also promoted cell death characterized by apoptosis and necrosis, and such cell death could be rescued by inhibitors against serine proteinase, MMP1, or MMP3. CONCLUSIONS Perturbation of PTX3 expression might partake in apoptosis and pathogenesis of CCh by upregulating expression of MMP-1 and MMP-3, and activation of MMP-1 and MMP-3.
Collapse
Affiliation(s)
- Ping Guo
- Shenzhen Eye Hospital of Jinan University, Shenzhen, Guangdong, China
| | | | | | | | | |
Collapse
|
38
|
Abstract
PURPOSE The perivascular localization of stem cell (SC) niches suggests the presence of a vascular niche. We aimed to determine the angiogenesis potential of limbal niche cells (NCs). METHODS Human limbal NCs were isolated and serially passaged on plastic or coated Matrigel in embryonic SC medium containing BFGF and leukemia inhibitory factor before being reseeded in 3D Matrigel. Expression of angiogenesis markers was assessed by RT-qPCR and immunofluorescence staining. Their angiogenesis potential was measured by differentiation into vascular endothelial cells and by supporting vascular tube network formed by human umbilical vein endothelial cells (HUVEC) on Matrigel. Their support of limbal epithelial progenitor cells (LEPC) was examined in sphere growth formed by reunion in 3D Matrigel. RESULTS On plastic, limbal NC could be cultured only up to four passages before turning into myofibroblasts. In contrast, on coated Matrigel, they could be expanded for up to 12 passages with upregulation of markers suggestive of angiogenesis progenitors when reseeded in 3D Matrigel because they could differentiate into vascular endothelial cells and pericytes stabilizing the tube network formed by HUVEC. Although both expanded limbal NCs and HUVEC rejoined with LEPC to form spheres to upregulate expression of ΔNp63α, CK15, and CEBPδ, the former but not the latter abolished expression of CK12 keratin. CONCLUSIONS Human limbal NCs continuously expanded on the basement membrane differentiate into angiogenesis progenitors that prevent differentiation of LEPC/SCs. They may partake in formation of the vascular niche and contribute to angiogenesis during wound healing.
Collapse
Affiliation(s)
- Gui-Gang Li
- Department of Ophthalmology, Tongji Hospital, Wuhan, People's Republic of China
| | | | | | | | | |
Collapse
|
39
|
Gu QH, Xiong BX, Zhu YT, Wang Q, Shi PS. Development of 18 microsatellite loci for the freshwater snail Bellamya aeruginosa (Mollusca, Gastropoda). Genet Mol Res 2012; 11:1449-53. [PMID: 22653592 DOI: 10.4238/2012.may.18.4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Although it is a major freshwater gastropod species, genetic diversity of Bellamya aeruginosa was completely unknown. Eighteen microsatellite loci were isolated and characterized from (AC)(15)-enriched genomic libraries of the freshwater snail B. aeruginosa. Most of the 18 loci were successfully amplified and high polymorphic information content values were found, ranging from 0.244 to 0.792 (mean 0.541). The number of alleles per locus ranged from 5 to 13 (mean 8.8), the expected heterozygosity varied from 0.347 to 0.950 (mean 0.815) and the observed heterozygosity varied from 0.087 to 0.782 (mean 0.431). Eight loci showed significant deviation from Hardy-Weinberg equilibrium after Bonferroni's correction and no significant genotypic linkage disequilibrium was detected between most locus pairs, except for TXH79-TXH97 and TXH113-TXH121. These 18 polymorphic microsatellite loci should be useful for population genetics analysis and species identification of Bellamya.
Collapse
Affiliation(s)
- Q H Gu
- College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | | | | | | | | |
Collapse
|
40
|
Chen HC, Zhu YT, Chen SY, Tseng SCG. Wnt signaling induces epithelial-mesenchymal transition with proliferation in ARPE-19 cells upon loss of contact inhibition. J Transl Med 2012; 92:676-87. [PMID: 22391957 PMCID: PMC3961713 DOI: 10.1038/labinvest.2011.201] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Proliferation and epithelial-mesenchymal transition (EMT) of the retinal pigment epithelium (RPE) are hallmarks of proliferative vitreoretinopathy. This study aims at clarifying the role of growth factors, such as epidermal growth factor (EGF), fibroblast growth factor-2 (FGF-2), and transforming growth factor-β1 (TGF-β1), in controlling how RPE proliferates while undergoing EMT. When contact inhibition of post-confluent ARPE-19 cells was disrupted by EGTA, an increase of BrdU labeling was noted only in the presence of EGF and/or FGF-2, and was accompanied by EMT as evidenced by the loss of a normal RPE phenotype (altered cytolocalization of RPE65, N-cadherin, ZO-1, and Na,K-ATPase) and the gain of a mesenchymal phenotype (increased expression of vimentin, S100A4, and α-smooth muscle actin). EMT with proliferation by EGTA+EGF+FGF-2 was accompanied by activation of canonical Wnt signaling (judged by the TCF/LEF promoter activity, increased nuclear levels of and interaction between β-catenin and LEF1 proteins, and the replication by overexpression of β-catenin), abolished by concomitant addition of XAV939, a Wnt inhibitor, but not associated with suppression of Hippo signaling (negative expression of nuclear TAZ or YAP and cytoplasmic p-TAZ or p-YAP). The causative role of Wnt signaling on EMT with proliferation was confirmed by overexpression of stable S33Y β-catenin with EGTA treatment. In addition, contact inhibition disrupted by EGTA in the presence of TGF-β1 also led to EMT, but suppressed proliferation and Wnt signaling. The Wnt signaling triggered by EGF+FGF-2 was sufficient and synergized with TGF-β1 in activating the Smad/ZEB1/2 signaling responsible for EMT. These findings establish a framework for further dissecting how RPE might partake in a number of proliferative vitreoretinopathies characterized by EMT.
Collapse
Affiliation(s)
- Hung-Chi Chen
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL, USA,Department of Ophthalmology, Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
| | - Ying-Ting Zhu
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL, USA
| | - Szu-Yu Chen
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL, USA
| | - Scheffer C. G. Tseng
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, FL, USA
| |
Collapse
|
41
|
Zhu YT, Chen HC, Chen SY, Tseng SCG. Nuclear p120 catenin unlocks mitotic block of contact-inhibited human corneal endothelial monolayers without disrupting adherent junctions. J Cell Sci 2012; 125:3636-48. [PMID: 22505615 DOI: 10.1242/jcs.103267] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Contact inhibition ubiquitously exists in non-transformed cells that are in contact with neighboring cells. This phenomenon explains the poor regenerative capacity of in vivo human corneal endothelial cells during aging, injury and surgery. This study demonstrated that the conventional approach of expanding human corneal endothelial cells by disrupting contact inhibition with EDTA followed by bFGF activated canonical Wnt signaling and lost the normal phenotype to endothelial-mesenchymal transition, especially if TGFβ1 was added. By contrast, siRNA against p120 catenin (CTNND1) also uniquely promoted proliferation of the endothelial cells by activating trafficking of p120 catenin to the nucleus, thus relieving repression by nuclear Kaiso. This nuclear p120-catenin-Kaiso signaling is associated with activation of RhoA-ROCK signaling, destabilization of microtubules and inhibition of Hippo signaling, but not with activation of Wnt-β-catenin signaling. Consequently, proliferating human corneal endothelial cells maintained a hexagonal shape, with junctional expression of N-cadherin, ZO-1 and Na(+)/K(+)-ATPase. Further expansion of human corneal endothelial monolayers with a normal phenotype and a higher density was possible by prolonging treatment with p120 catenin siRNA followed by its withdrawal. This new strategy of perturbing contact inhibition by selective activation of p120-catenin-Kaiso signaling without disrupting adherent junction could be used to engineer surgical grafts containing normal human corneal endothelial cells to meet a global corneal shortage and for endothelial keratoplasties.
Collapse
Affiliation(s)
- Ying-Ting Zhu
- Research and Development Department, TissueTech Inc, Ocular Surface Center and Ocular Surface Research and Education Foundation, Miami, FL 33173, USA
| | | | | | | |
Collapse
|
42
|
Zhang Y, Ronning F, Gofryk K, Mara NA, Haberkorn N, Zou G, Wang H, Lee JH, Bauer E, McCleskey TM, Burell AK, Civale L, Zhu YT, Jia Q. Aligned carbon nanotubes sandwiched in epitaxial NbC film for enhanced superconductivity. Nanoscale 2012; 4:2268-2271. [PMID: 22370969 DOI: 10.1039/c2nr11906d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Highly aligned carbon nanotube (CNT) ribbons were sandwiched in epitaxial superconducting NbC films by a chemical solution deposition method. The incorporation of aligned long CNTs into NbC film enhances the normal-state conductivity and improves the superconducting properties of the assembly.
Collapse
Affiliation(s)
- Yingying Zhang
- Division of Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Guo P, Zhang SZ, He H, Zhu YT, Tseng SCG. TSG-6 controls transcription and activation of matrix metalloproteinase 1 in conjunctivochalasis. Invest Ophthalmol Vis Sci 2012; 53:1372-80. [PMID: 22297496 DOI: 10.1167/iovs.11-8738] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To investigate the role of anti-inflammatory TSG-6 in controlling MMP-1 and MMP-3, which have been shown to be upregulated in conjunctivochalasis (CCh). METHODS Immunostaining of TSG-6 was compared between normal and CCh conjunctiva and Tenon's capsule. Second cultures of normal and CCh fibroblasts were transfected with or without TSG-6 siRNA and then with or without the addition of TNF-α or IL-1β. Cell lysates and culture media were collected to assess apoptosis with the use of ELISA and the expression of TSG-6, MMP-1, and MMP-3 transcripts and proteins with the use of qRT-PCR and Western blot analysis, respectively. RESULTS TSG-6 expression was constitutive in the in vivo normal conjunctival epithelium. Significantly more TSG-6-positive cells than normal specimens were noted in CCh subconjunctival tissue and Tenon's capsule. TSG-6 was constitutively expressed intracellularly by both resting normal and CCh fibroblasts but was secreted extracellularly only by resting CCh fibroblasts. Intracellular and extracellular TSG-6 proteins were markedly upregulated by TNF-α or IL-1β in normal and CCh fibroblasts. Active MMP-1 was found in CCh fibroblasts intracellularly and extracellularly, whereas only proMMP-1 was found intracellularly in normal fibroblasts. Knockdown by TSG-6 siRNA upregulated more MMP-1 than MMP-3 transcripts in normal and CCh fibroblasts. TSG-6 siRNA led to extracellular MMP-1 expression by normal fibroblasts such as CCh fibroblasts. This activation of MMP-1 was further enhanced by IL-1β. Cell apoptosis was higher in CCh fibroblasts and further aggravated by TSG-6 siRNA knockdown. CONCLUSIONS TSG-6 exerts an anti-inflammatory function by counteracting the transcription of MMP-1 and MMP-3 and the activation of MMP-1. Dysfunction of TSG-6 might play a role in the pathogenesis of CCh.
Collapse
Affiliation(s)
- Ping Guo
- R&D Department, TissueTech, Inc., Ocular Surface Center, and Ocular Surface Research & Education Foundation, Miami, Florida, USA
| | | | | | | | | |
Collapse
|
44
|
Yang H, Zhu YT, Cheng R, Shao MY, Fu ZS, Cheng L, Wang FM, Hu T. Lipopolysaccharide-induced dental pulp cell apoptosis and the expression of Bax and Bcl-2 in vitro. Braz J Med Biol Res 2010; 43:1027-33. [PMID: 20945038 DOI: 10.1590/s0100-879x2010007500102] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2010] [Accepted: 09/22/2010] [Indexed: 12/23/2022] Open
Abstract
Lipopolysaccharide exerts many effects on many cell lines, including cytokine secretion, and cell apoptosis and necrosis. We investigated the in vitro effects of lipopolysaccharide on apoptosis of cultured human dental pulp cells and the expression of Bcl-2 and Bax. Dental pulp cells showed morphologies typical of apoptosis after exposure to lipopolysaccharide. Flow cytometry showed that the rate of apoptosis of human dental pulp cells increased with increasing lipopolysaccharide concentration. Compared with controls, lipopolysaccharide promoted pulp cell apoptosis (P < 0.05) from 0.1 to 100 μg/mL but not at 0.01 μg/mL. Cell apoptosis was statistically higher after exposure to lipopolysaccharide for 3 days compared with 1 day, but no difference was observed between 3 and 5 days. Immunohistochemistry showed that expression of Bax and Bcl-2 was enhanced by lipopolysaccharide at high concentrations, but no evident expression was observed at low concentrations (0.01 and 0.1 μg/mL) or in the control groups. In conclusion, lipopolysaccharide induced dental pulp cell apoptosis in a dose-dependent manner, but apoptosis did not increase with treatment duration. The expression of the apoptosis regulatory proteins Bax and Bcl-2 was also up-regulated in pulp cells after exposure to a high concentration of lipopolysaccharide.
Collapse
Affiliation(s)
- H Yang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | | | | | | | | | | | | | | |
Collapse
|
45
|
Zhang Y, Sheehan CJ, Zhai J, Zou G, Luo H, Xiong J, Zhu YT, Jia QX. Polymer-embedded carbon nanotube ribbons for stretchable conductors. Adv Mater 2010; 22:3027-31. [PMID: 20518036 DOI: 10.1002/adma.200904426] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Affiliation(s)
- Yingying Zhang
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | | | | | | | | | | | | | | |
Collapse
|
46
|
Beyerlein IJ, Porwal PK, Zhu YT, Hu K, Xu XF. Scale and twist effects on the strength of nanostructured yarns and reinforced composites. Nanotechnology 2009; 20:485702. [PMID: 19880980 DOI: 10.1088/0957-4484/20/48/485702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this work we investigate the effects of yarn diameter and gauge length on the statistical strength of yarns spun from carbon nanotubes (CNTs). Tensile tests are conducted on a large sample set of nanostructured CNT yarns. The data show that strength varies substantially and both strength and statistical dispersion in strength decreases as yarn diameter increases. To explain these phenomena and forecast their effects on larger-scale structures, a hierarchical set of Monte Carlo simulation models is developed: the lower-scale model aims to predict the relationship between yarn nanostructure and tensile strength and the higher-scale model aims to relate the strength of CNT yarns to the strength of composites reinforced with unidirectionally aligned CNT yarns. Predictions indicate that, for both structures, the mean and statistical variation in strength will decrease as the surface twist angle, number of CNTs in cross section and gauge length of the yarn increases. The predicted reductions in variability due to yarn nanostructure will be important for determining ways to minimize the detrimental effects of increasing length scale on strength.
Collapse
Affiliation(s)
- I J Beyerlein
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | | | | | | | | |
Collapse
|
47
|
Abstract
Low strain hardening has hitherto been considered an intrinsic behavior for most nanocrystalline (NC) metals, due to their perceived inability to accumulate dislocations. In this Letter, we show strong strain hardening in NC nickel with a grain size of approximately 20 nm under large plastic strains. Contrary to common belief, we have observed significant dislocation accumulation in the grain interior. This is enabled primarily by Lomer-Cottrell locks, which pin the lock-forming dislocations and obstruct dislocation motion. These observations may help with developing strong and ductile NC metals and alloys.
Collapse
Affiliation(s)
- X L Wu
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
| | | | | | | |
Collapse
|
48
|
Peng H, Chen D, Huang JY, Chikkannanavar SB, Hänisch J, Jain M, Peterson DE, Doorn SK, Lu Y, Zhu YT, Jia QX. Strong and ductile colossal carbon tubes with walls of rectangular macropores. Phys Rev Lett 2008; 101:145501. [PMID: 18851539 DOI: 10.1103/physrevlett.101.145501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 04/24/2008] [Indexed: 05/26/2023]
Abstract
We report a new type of carbon material-porous colossal carbon tubes. Compared with carbon nanotubes, colossal carbon tubes have a much bigger size, with a diameter of between 40 and 100 mum and a length in the range of centimeters. Significantly, the walls of the colossal tubes are composed of macroscopic rectangular columnar pores and exhibit an ultralow density comparable to that of carbon nanofoams. The porous walls of colossal tubes also show a highly ordered lamellar structure similar to that of graphite. Furthermore, colossal tubes possess excellent mechanical and electrical properties.
Collapse
Affiliation(s)
- Huisheng Peng
- The Institute for Advanced Materials & Nano Biomedicine, Tongji University, Shanghai 200092, China.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Zhu YT, Hayashida Y, Kheirkhah A, He H, Chen SY, Tseng SCG. Characterization and comparison of intercellular adherent junctions expressed by human corneal endothelial cells in vivo and in vitro. Invest Ophthalmol Vis Sci 2008; 49:3879-86. [PMID: 18502989 PMCID: PMC2566851 DOI: 10.1167/iovs.08-1693] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Human corneal endothelial cell (HCEC) proliferation is controlled by HCEC junctions, but the mechanism of proliferation remains unknown. The authors sought to characterize adherent junction components of in vivo HCECs and to compare their gene expression and their proliferative potential with those of in vitro counterparts. METHODS Stripped human Descemet membranes were digested with collagenase A, and the resultant HCEC aggregates were cultured for 7, 14, and 21 days in supplemented hormonal epithelial medium (SHEM). The growth of HCEC monolayers was monitored by BrdU labeling performed 24 hours before termination. In vivo and in vitro HCECs were subjected to immunostaining to FITC-phalloidin and antibodies to different junction components and BrdU. Their mRNA expressions were determined by RT-PCR. RESULTS In vivo HCECs expressed transcripts of N-, VE-, E-, and P-cadherins, alpha-, beta-, gamma-, and p120-catenins, and p190. In vitro HCEC counterparts also expressed all these mRNAs except P-cadherin. In vivo HCECs displayed continuous circular F-actin, N-cadherin, beta- and p120-catenins, and p190, discontinuous circular VE-cadherin bands at or close to cell junctions, and E-cadherin in the cytoplasm. Such an in vivo pattern was gradually achieved by in vitro HCECs at day 21 and was correlated with a progressive decline of BrdU labeling. CONCLUSIONS In vivo and in vitro HCECs displayed distinct protein cytolocalization of N-, VE-, and E-cadherins, beta- and p120-catenins, and p190. Progressive maturation of adherent junctions was associated with a decline of the proliferative potential. This information allows us to devise new strategies to engineer in vitro HCECs by targeting these components.
Collapse
Affiliation(s)
- Ying-Ting Zhu
- Tissue Tech, Inc., Ocular Surface Center, and Ocular Surface Research and Education Foundation, Miami, Florida, USA
| | | | | | | | | | | |
Collapse
|
50
|
Abstract
A long-standing controversy exists between molecular dynamics simulations and experiments on the twinning propensity of nanocrystalline (NC) face-centered-cubic metals. For example, three-dimensional molecular dynamics simulations rarely observed twins in NC Ni, whereas experiments readily observed them. Here this discrepancy is resolved by experimental observation of an inverse grain-size effect on twinning. Specifically, decreasing the grain size first promotes twinning in NC Ni and then hinders twinning due to the inverse grain-size effect. Interestingly, no inverse grain-size effect exists on stacking fault formation. These observations are explained by generalized planar fault energies and grain-size effect on partial emissions.
Collapse
Affiliation(s)
- X L Wu
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
| | | |
Collapse
|