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5-aza-2'-deoxycytidine in the regulation of antioxidant enzymes in retinal endothelial cells and rat diabetic retina

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International Journal of Ophthalmology(English edition) 2019年第1期12卷 1-7页

作者： Man-Yun Xie Yan Yang Ping Liu Yan Luo shi-bo tang Department of Ophthalmology the Second Xiangya HospitalCentral South University Hunan Clinical Research Center of Ophthalmic Diseas The State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen University Aier School of Ophthalmology Central South University Aier Research Institute of Ophthalmology

AIM: To investigate the roles of a DNA methyltransferase(DNMT) inhibitor 5-aza-2'-deoxycytidine(5-aza-dC) in the regulation of antioxidant enzymes in diabetic retinopathy(DR) models. METHODS: DNMTs expressions and activity, and changes of two key antioxidant enzymes in DR, MnSOD(encoded by SOD2 gene) and glutathione S-transferase theta 1(GSTT1), were quantified in the isolated human retinal endothelial cells(HRECs) exposed to high glucose(HG) with or without 5-aza-dC treatment. The downstream exacerbating factors including vascular endothelial growth factor(VEGF), intercellular adhesion molecule 1(ICAM-1) and matrix metalloproteinase 2(MMP2), which are implicated in the pathogenesis of DR and closely related to oxidative stress were also analyzed. The key parameters were confirmed in the retina from streptozotocin(STZ) diabetic rats. RESULTS: DNMTs expression and DNMT activity was induced in HRECs exposed to HG. Hyperglycemia decreased MnSOD and GSTT1 expression. 5-aza-dC administration effectively suppressed DNMTs expression and activity and reversed the MnSOD and GSTT1 expression under HG condition. VEGF, ICAM-1 and MMP2 induced by HG were also suppressed by 5-aza-dC treatment. Similar results were observed in the retina from STZ diabetic rats. CONCLUSION: Our findings suggest that DNA methylation may serves as one of the mechanisms of antioxidant defense system disruption in DR progression. Modulation of DNA methylation using pharmaceutic means such as DNMT inhibitors could help maintain redox homeostasis and prevent further progression of DR.

关键词： DNA methylation diabetic model 5-aza-dC oxidative stress inflammation human retinal endothelial cells rat

Morphological and immunocytochemical analysis of human retinal glia subtypes in vitro

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 559-563页

作者： Shao-Fen Lin Yu-Xiang Mao Bin Li Wei Sun shi-bo tang Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-Sen University Department of Ophthalmology the Affiliated Wuhan Tongji Hospital of Huazhong University of Science and Technology

AIMTo examine the morphological characteristics and antigen expression patterns of cultured human retinal glia to define novel subtypes.

关键词： retina glia morphology

Characteristics of neural growth and cryopreservation of the dorsal root ganglion using three-dimensional collagen hydrogel culture versus conventional culture

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Neural Regeneration Research 2021年第9期16卷 1856-1864页

作者： Ze-Kai Cui Shen-Yang Li Kai Liao Zhi-Jie Wang Yong-Long Guo Luo-Sheng tang shi-bo tang Jacey Hongjie Ma Jian-Su Chen Department of Ophthalmology the Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Aier Eye Institute ChangshaHunan ProvinceChina Aier School of Ophthalmology Central South UniversityChangshaHunan ProvinceChina Institute of Ophthalmology Medical CollegeJinan UniversityGuangzhouGuangdong ProvinceChina Department of Ophthalmology First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Key Laboratory for Regenerative Medicine of Ministry of Education Jinan UniversityGuangzhouGuangdong ProvinceChina CAS Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghaiChina Imaging and Functional Center Guangzhou Aier Eye HospitalGuangzhouGuangdong ProvinceChina

In vertebrates, most somatosensory pathways begin with the activation of dorsal root ganglion(DRG) neurons. The development of an appropriate DRG culture method is a prerequisite for establishing in vitro peripheral nerve disease models and for screening therapeutic drugs. In this study, we compared the changes in morphology, molecular biology, and transcriptomics of chicken embryo DRG cultured on tissue culture plates(T-DRG) versus three-dimensional collagen hydrogels(C-DRG). Our results showed that after 7 days of culture, the transcriptomics of T-DRG and C-DRG were quite different. The upregulated genes in C-DRG were mainly related to neurogenesis, axon guidance, and synaptic plasticity, whereas the downregulated genes in C-DRG were mainly related to cell proliferation and cell division. In addition, the genes related to cycles/pathways such as the synaptic vesicle cycle, cyclic adenosine monophosphate signaling pathway, and calcium signaling pathway were activated, while those related to cell-cycle pathways were downregulated. Furthermore, neurogenesis-and myelination-related genes were highly expressed in C-DRG, while epithelial–mesenchymal transition-, apoptosis-, and cell division-related genes were suppressed. Morphological results indicated that the numbers of branches, junctions, and end-point voxels per C-DRG were significantly greater than those per T-DRG. Furthermore, cells were scattered in T-DRG and more concentrated in C-DRG, with a higher ratio of 5-ethynyl-2′-deoxyuridine(EdU)-positive cells in T-DRG compared with C-DRG. C-DRG also had higher S100 calcium-binding protein B(S100 B) and lower α-smooth muscle actin(α-SMA) expression than T-DRG, and contained fewer terminal deoxynucleotidyl transferase dUTP nick end labeling(TUNEL)-positive cells after 48 hours of serum starvation. After cryopreservation, C-DRG maintained more intact morphological characteristics, and had higher viability and less TUNEL-positive cells than T-DRG. Furthermore, newly for

关键词： anti-apoptosis collagen hydrogel cryopreservation dorsal root ganglion neurogenesis RNA-seq Schwann cell tissue engineering

Gut microbiota induced abnormal amino acids and their correlation with diabetic retinopathy

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 883-895页

作者： Sheng-Qun Jiang Su-Na Ye Yin-Hua Huang Yi-Wen Ou Ke-Yang Chen Jian-Su Chen shi-bo tang Aier Eye Hospital Jinan UniversityGuangzhou 510000Guangdong ProvinceChina Aier Eye Institute and Changsha Aier Hospital Changsha 410000Hunan ProvinceChina The First Affiliated Hospital of Bengbu Medical University Bengbu 233000Anhui ProvinceChina School of Public Health Anhui Medical UniversityHefei 230000Anhui ProvinceChina

AIM:To explore the correlation of gut microbiota and the metabolites with the progression of diabetic retinopathy(DR)and provide a novel strategy to elucidate the pathological mechanism of ***:The fecal samples from 32 type 2 diabetes patients with proliferative retinopathy(PDR),23 with nonproliferative retinopathy(NPDR),27 without retinopathy(DM),and 29 from the sex-,age-and BMI-matched healthy controls(29 HC)were analyzed by 16S rDNA gene *** fecal samples from PDR,DM,and HC groups were assayed by untargeted *** metabolites were measured using liquid chromatographymass spectrometry(LC-MS)*** between gut microbiota and fecal metabolites were ***:A cluster of 2 microbiome and 12 metabolites accompanied with the severity of DR,and the close correlation of the disease progression with PDR-related microbiome and metabolites were *** be specific,the structure of gut microbiota differed in four *** and richness of gut microbiota were significantly lower in PDR and NPDR groups,than those in DM and HC groups.A cluster of microbiome enriched in PDR group,including Pseudomonas,Ruminococcaceae-UCG-002,Ruminococcaceae-UCG-005,Christensenellaceae-R-7,was *** analysis showed that the glucose and nicotinate degradations were significantly higher in PDR group than those in HC ***,serine,ornithine,and arachidonic acid were significantly enriched in PDR group,while proline was enriched in HC *** analysis illustrated that arginine biosynthesis,lysine degradation,histidine catabolism,central carbon catabolism in cancer,D-arginine and D-ornithine catabolism were elevated in PDR *** analysis revealed that Ruminococcaceae-UCG-002 and Christensenellaceae-R-7 were positively associated with L-arginine,ornithine levels in fecal ***:This study elaborates the different microbiota structure in the gut from four *** relative abundance of

关键词： proliferative retinopathy gut microbiota Ruminococcaceae amino acid metabolism arginine

Lutein delays photoreceptor degeneration in a mouse model of retinitis pigmentosa

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Neural Regeneration Research 2022年第7期17卷 1596-1603页

作者： Hui-Jun Zhang Xiao-Bin Liu Xiong-Min Chen Qi-Hang Kong Yu-Sang Liu Kwok-Fai So Jian-Su Chen Ying Xu Xue-Song Mi shi-bo tang Department of Ophthalmology the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Department of Ophthalmology Guangzhou Panyu Central HospitalGuangzhouGuangdong ProvinceChina Guangdong-Hong Kong-Macao Institute of CNS Regeneration Jinan UniversityGuangzhouGuangdong ProvinceChina Laboratory of Retinal Cell Biology Aier Eye InstituteChangshaHunan ProvinceChina Aier Academician Station ChangshaHunan ProvinceChina Key Laboratory of CNS Regeneration(Jinan University) Ministry of EducationGuangzhouGuangdong ProvinceChina CoInnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina

Retinitis pigmentosa is a retinal disease characterized by photoreceptor *** is currently no effective treatment for retinitis *** a mixture of lutein and other antioxidant agents has shown promising effects in protecting the retina from degeneration,the role of lutein alone remains *** this study,we administered intragastric lutein to Pde6brd10 model mice,which display degeneration of retinal photoreceptors,on postnatal days 17(P17)to P25,when rod apoptosis reaches *** at the optimal protective dose of 200 mg/kg promoted the survival of photoreceptors compared with vehicle *** increased rhodopsin expression in rod cells and opsin expression in cone cells,in line with an increased survival rate of ***,lutein improved visual behavior,visual acuity,and retinal electroretinogram responses in Pde6brd10 ***,lutein reduced the expression of glial fibrillary acidic protein in Müller glial *** results of this study confirm the ability of lutein to postpone photoreceptor degeneration by reducing reactive gliosis of Müller cells in the retina and exerting anti-inflammatory *** study was approved by the Laboratory Animal Ethics Committee of Jinan University(approval ***-20181217-02)on December 17,2018.

关键词： anti-inflammation glial fibrillary acidic protein lutein microglia Pde6brd10(rd10)mouse photoreceptor reactive gliosis retinal degeneration retinal disease retinitis pigmentosa

光学相干断层扫描血管成像在DR中的临床应用

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国际眼科杂志 2017年第8期17卷 1477-1480页

作者：向湘唐仕波中南大学爱尔眼科学院中国湖南省长沙市410000 深圳爱尔眼科医院眼底病科中国广东省深圳市518000

光学相干断层扫描血管成像(optical coherence tomography angiography,OCTA)是近年新兴发展的一种无创性血管成像技术,无需使用造影剂便能快速、安全获得高分辨率眼底血管成像,已被广泛应用于眼科疾病的诊治和随访,尤其是血管性病变如... 详细信息

光学相干断层扫描血管成像(optical coherence tomography angiography,OCTA)是近年新兴发展的一种无创性血管成像技术,无需使用造影剂便能快速、安全获得高分辨率眼底血管成像,已被广泛应用于眼科疾病的诊治和随访,尤其是血管性病变如糖尿病性视网膜病变(DR),年龄相关性黄斑变性(AMD),视网膜中央/分支静脉阻塞(CRVO/BRVO),脉络膜新生血管(CNV)等。

关键词：光学相干断层扫描血管成像糖尿病性视网膜病变视网膜毛细血管

Reduced Macular Vascular Density in Myopic Eyes

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Chinese Medical Journal 2017年第4期130卷 445-451页

作者： Hua Fan Hao-Yu Chen Hong-Jie Ma Zheng Chang Hai-Quan Yin Danny Siu-Chun Ng Carol Y Cheung Shan Hu Xiang Xiang shi-bo tang Shuang-Nong Li Aier School of Ophthalmology Central South University Changsha Hunan 410015 China Joint Shantou International Eye Center Shantou Guangdong 515000 China Shenzhen Aier Eye Hospital Shenzhen Guangdong 518000 China Department of Ophthalmology and Visual Sciences The Chinese University of Hong Kong Hong Kong 999077 China

Background： Morphological changes of the vasculature system in patients with myopia have been observed by Doppler ultrasound and fundus fluorescein angiography （FFA）; however, these studies have limitations. Doppler ultrasound provides low-resolution images which are mainly obtained from visualized large vessels, and FFA is an invasive examination. Optic coherence tomography （OCT） angiography is a noninvasive, high-resolution measurement for vascular density. The purpose of this study was to investigate the change of vascular density in myopic eyes using OCT angiography. Methods： This cross-sectional study includes a total of 91 eyes ~Yom 47 participants including control, moderate, and high myopia that were evaluated by OCT angiography. Patients with myopia were recruited from the Refractive Department, Shenzhen Aier Eye Hospital, from August 5, 2015 to April 1, 2016. Emmetropic eyes were from healthy volunteers. The vascular density at macula and optic disc regions, ganglion cell complex （GCC） thickness, and retinal nerve fiber layer （RNFL） thickness were measured. Their relationships with axial length （AL） and refractive error were analyzed. One-way analysis of variance （ANOVA）, Pearson＇s correlation, and generalized estimating equation were used for statistical analysis, Results： both superficial and deep macular vascular density were highest in control （25.64% ± 3.76% and 37.12% ± 3.66%, respectively）, then in moderate myopia （21.15% ± 5.33% and 35.35% ± 5.50%, respectively）, and lowest in high myopia group （ 19.64% ± 3.87% and 32.81% ± 6.29%, respectively）（F =13.74 and 4.57, respectively; both P 〈 0.001）. both superficial （β = -0.850 and 0.460, respectively） and deep （β = -0.766 and 0.396, respectively） macular vascular density were associated with AL and spherical equivalent （all P 〈 0.001 ）. Superficial macular vascular density was associated with GCC thickness （β = 0.244, P = 0.040）, independent of spherical equivalent. The vascular density in optic disc r

关键词： Myopia Optic Coherence Tomography Angiography Vascular Density

Prediction and optimization of flue pressure in sintering process based on SHAP

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu Wang Jue tang Mansheng Chu Quan shi Zhen Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization

Chinese Guideline on the Management of Polypoidal Choroidal Vasculopathy (2022)

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Chinese Medical Sciences Journal 2023年第2期38卷 77-93页

作者： You-Xin Chen Yu-Qing Zhang Chang-Zheng Chen Hong Dai Su-Yan Xiang Ma Xiao-Dong Sun shi-bo tang Yu-Sheng Wang Wen-Bin Wei Feng Wen Ge-Zhi Xu Wei-Hong Yu Mei-Xia Zhang Ming-Wei Zhao Yang Zhang Fang Qi Xun Xu Xiao-Xin Li Department of Ophthalmology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing China Key Laboratory of Ocular Fundus Diseases Chinese Academy of Medical Sciences&Peking Union Medical College Department of Health Research Methods Evidenceand ImpactMc Master University Ningbo Nottingham GRADE center University of Nottingham Institute of Acupuncture and Moxibustion China Academy of Chinese Medical Sciences CEBIM(Center for Evidence Based Integrative Medicine)-Clarity Collaboration Guang'anmen HospitalChina Academy of Chinese Medical Sciences Department of Ophthalmology Renmin Hospital of Wuhan University Department of Ophthalmology Beijing Hospital Department of Ophthalmology Xuzhou Municipal Hospital Affiliated to Xuzhou medical University Department of Ophthalmology the First Affiliated Hospital of Dalian Medical University Department of Oph thalmology Shanghai General HospitalShanghai Jiao Tong University School of Medicine Aire Eye Hospital Department of Ophthalmology Xijing HospitalFouth Military Medical University Department of Ophthalmology Beijing Tongren Hospital State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen University Ophthalmology the Affiliated Eye and ENT HospitalShanghai Medical SchoolFudan University Department of Ophthalmology West China School of MedicineWest China HospitalSichuan University Department of Ophthalmology Peking University People’s Hospital Systematic Review Solutions Ltd Department of Ophthalmology Shanghai General Hospital Eye Center of Xiamen University People Eye Center of People’s Hospital Peking University

Background In China's Mainland,patients with neovascular age-related macular degeneration(nAMD)have approximately an 40%prevalence of polypoidal choroidal vasculopathy(PCV).This disease leads to recurrent retinal pigment epithelium detachment(PED),extensive subretinal or vitreous hemorrhages,and severe vision *** has introduced various treatment modalities in the past years and gained comprehensive experience in treating *** A total of 14 retinal specialists nationwide with expertise in PCV were empaneled to prioritize six questions and address their corresponding outcomes,regarding opinions on inactive PCV,choices of anti-vascular endothelial growth factor(anti-VEGF)monotherapy,photodynamic therapy(PDT)monotherapy or combined therapy,patients with persistent subretinal fluid(SRF)or intraretinal fluid(IRF)after loading dose anti-VEGF,and patients with massive subretinal *** evidence synthesis team conducted systematic reviews,which informed the recommendations that address these *** guideline used the GRADE(Grading of Recommendations,Assessment,Development,and Evaluation)approach to assess the certainty of evidence and grade the strengths of *** The panel proposed the following six conditional recommendations regarding treatment choices.(1)For patients with inactive PCV,we suggest observation over treatment.(2)For treatment-na?ve PCV patients,we suggest either anti-VEGF monotherapy or combined anti-VEGF and PDT rather than PDT monotherapy.(3)For patients with PCV who plan to initiate combined anti-VEGF and PDT treatment,we suggest later/rescue PDT over initiate PDT.(4)For PCV patients who plan to initiate anti-VEGF monotherapy,we suggest the treat and extend(TE)regimen rather than the pro re nata(PRN)regimen following three monthly loading doses.(5)For patients with persistent SRF or IRF on optical coherence tomography(OCT)after three monthly anti-VEGF treatments,we suggest proceeding with anti-VEGF treatment r

关键词： polypoidal choroidal vasculopathy anti-vascular endothelial growth factor photodynamic therapy surgery