Project description:Purpose: To characterize microRNAs (miRNAs) and their possible roles in high myopia by using next generation sequencing Methods: Aqueous humor samples were obtained from 15 highly myopic eyes and 15 cataract eyes at the onset of surgery. miRNA next generation sequencing and bioinformatics analyses were performed using RNA extracted from aqueous humor samples. Results: A total of 341 miRNAs were detected in the aqueous humor samples of highly myopic eyes; 201 miRNAs were detected in the aqueous humor samples of cataractous control eyes. A total of 249 mature miRNAs and 17 novel miRNAs were differentially expressed during myopia. Possible pathways regulated by these aberrantly expressed miRNAs included the TNF, MAPK, PI3K-Akt, and HIF-1 signaling pathways. Conclusions: The current study provided an overall view of miRNA profiling in the aqueous humor of highly myopic eyes. These profiles may be associated with myopia pathogenesis, and are potential biomarkers.
Project description:To explore the regulatory mechanism of age-related cataract (ARC) formation and progression，we construct sodium selenite-induced rat cataract model and performed the high-throughput RNA sequencing (HTS) technology to identify the mRNA and miRNA expression profiles of the lens from Na2Se03-induced and saline - injected Sprague Dawley rats.
Project description:This work describes a proteomic analysis for different types of glaucoma (PACG, NVG) and age-related cataract as control. The AH samples were recruited from 175 individual patients with PACG, NVG and age-related cataract. First, in discovery cohort the AH proteome characteristics of PAACG, PCACG and NVG with cataract were compared by DIA approach. Second, AH proteomic features of three types of glaucoma, PAACG, PCACG and NVG, were mutually compared. In validation cohort the key proteins of above comparison were validated by PRM approach.
Project description:To explore the regulatory mechanism of age-related cataract (ARC) formation and progression，we construct sodium selenite-induced rat cataract model and performed the high-throughput RNA sequencing (HTS) technology to identify the mRNA and miRNA expression profiles of the lens from Na2Se03-induced and saline - injected Sprague Dawley rats.
Project description:To characterize the N6-methyladenosine (m6A) modification patterns in long non-coding RNAs (lncRNAs) in sporadic congenital cataract (CC) and age-related cataract(ARC).
Project description:Age-related cell loss underpins many senescence-associated diseases. Senile cataract is a primary blindness-causing age-related ocular disease. Apoptosis of lens epithelial cells (LECs) is the common cellular basis of senile cataract resulted from prolonged exposure to oxidative stress, the mechanism of which remains elusive. Here we reported the concomitance of increased autophagy and apoptosis in the same LEC from senile cataract patients. Oxidative stress triggered autophagy preceded apoptosis, while blocking autophagy by ablation of Atg7 or Atg3 gene remarkably suppressed apoptosis in HLE-B3 cell line. We identified autophagy adaptor SQSTM1/p62 as the critical scaffold protein to sustain a pro-survival signaling PKCι-NF-κB cascades, which antagonized the pro-apoptotic signaling in LECs. Importantly, prolonged autophagy in human senescent LECs responding to oxidative stress induced extensive degradation of p62 protein and therefore facilitated apoptosis. Moreover, pharmacological inhibitor of autophagy, 3-MA, significantly rescued apoptosis of human senescent LECs challenged by oxidative stress. Collectively, our data demonstrated that hyperactivation of autophagy aggravates age-related apoptotic cell death via inhibiting the p62-PKCι-NF-κB pro-survival axis in human senescent LECs. This work expands the understanding of the etiology of senile cataract and provides insight for mechanisms of age-related cell death in senescence-associated diseases.
Project description:The focus of our research centers on exploring the proteome changes and corresponding signaling pathways involved in the development of diabetic cataract, age-related cataract and post-vitrectomy cataract, investigating aqueous humor, anterior capsule and lens human samples. Outstanding proteomic profiles of the three sample types have been generated using DIA proteomics. We have observed substantial differences in the regulation of several pathways between our groups and samples types, and we have particularly highlighted the involvement of non-canonical Wnt receptor signaling pathway, glycosaminoglycan and glycosphingolipid pathways, and oxidation reduction pathway in the formation of different cataract forms.
Project description:The focus of our research centers on exploring the proteome changes and corresponding signaling pathways involved in the development of diabetic cataract, age-related cataract and post-vitrectomy cataract, investigating aqueous humor, anterior capsule and lens human samples. Outstanding proteomic profiles of the three sample types have been generated using DIA proteomics. We have observed substantial differences in the regulation of several pathways between our groups and samples types, and we have particularly highlighted the involvement of non-canonical Wnt receptor signaling pathway, glycosaminoglycan and glycosphingolipid pathways, and oxidation reduction pathway in the formation of different cataract forms.
Project description:The focus of our research centers on exploring the proteome changes and corresponding signaling pathways involved in the development of diabetic cataract, age-related cataract and post-vitrectomy cataract, investigating aqueous humor, anterior capsule and lens human samples. Outstanding proteomic profiles of the three sample types have been generated using DIA proteomics. We have observed substantial differences in the regulation of several pathways between our groups and samples types, and we have particularly highlighted the involvement of non-canonical Wnt receptor signaling pathway, glycosaminoglycan and glycosphingolipid pathways, and oxidation reduction pathway in the formation of different cataract forms.
