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Intravitreal injection of conbercept for diabetic macular edema complicated with diabetic nephropathy

International Journal of Ophthalmology(English edition) 2024年第2期17卷 304-310页

作者： Yuan-Zhang Zhu Zhi-Zhi Dou wen-Ying Wang Qing-Yue Ma wen-Dan Yi Ning-Ning Yao Yi-Chong Liu Xiao-Di Gao Qian Zhang wen-juan luo Department of Ophthalmology the Affiliated Hospital of Qingdao UniversityQingdao 266000Shandong ProvinceChina

AIM:To observe the therapeutic effect of conbercept on diabetic macular edema(DME)complicated with diabetic nephropathy(DN).METHODS:In this retrospective study,54 patients(54 eyes)that diagnosed as DME from January 2017 to October 2021 were *** patients were divided into two groups:DME patients with DN(25 eyes),and DME patients without DN(29 eyes).General conditions were collected before treatment,laboratory tests include fasting blood glucose,HbA1c,microalbumin/creatinine,serum *** coherence tomography(OCT)was used to check the ellipsoidal zone(EZ)and external limiting membrane(ELM)*** macular thickness(CMT),best corrected visual acuity(BCVA),and retinal hyperreflective foci(HF)as well as numbers of injections were ***:There were significant differences between fasting blood glucose,HbA1c,serum creatinine,urinary microalbumin/creatinine,and estimated glomerular filtration rate(eGFR)between the two groups(all P<0.05).EZ and ELM continuity in the DME+DN group was worse than that in the DME group(P<0.05).BCVA(logMAR)in the DME group was significantly better than that in the DME+DN group at the same time points during treatment(all P<0.05).CMT and HF values were significantly higher in the DME+DN group than that in the DME group at the all time points(all P<0.05)and significantly decreased in both groups with time during *** 6mo after treatment,the mean number of injections in the DME+DN and DME group was 4.84±0.94 and 3.79±0.86,***:Conbercept has a significant effect in short-term treatment of DME patients with or without DN,and can significantly ameliorate BCVA,CMT and the number of HF,treatment efficacy of DME patients without DN is better than that of DME patients with DN.

关键词： conbercept diabetic nephropathy diabetic macular edema optical coherence tomography

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Preliminary exploration of animal models of congenital choledochal cysts

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World Journal of Gastroenterology 2024年第10期30卷 1420-1430页

作者： Shu-Hao Zhang Yue-Bin Zhang Duo-Te Cai Tao Pan Ken Chen Yi Jin wen-juan luo Zong-Wei Huang Qing-Jiang Chen Zhi-Gang Gao Department of General Surgery Children’s HospitalZhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina

BACKGROUND Various animal models have been used to explore the pathogenesis of choledochal cysts(CCs),but with little convincing *** surgical techniques can achieve satisfactory outcomes for treatment of ***,recent studies have focused more on clinical issues rather than basic ***,we need appropriate animal models to further basic *** To establish an appropriate animal model that may contribute to the investigation of the pathogenesis of *** Eighty-four specific pathogen-free female Sprague-Dawley rats were randomly allocated to a surgical group,sham surgical group,or control group.A rat model of CC was established by partial ligation of the bile *** reliability of the model was confirmed by measurements of serum biochemical indices,morpho-logy of common bile ducts of the rats as well as molecular biology experiments in rat and human *** Dilation classified as mild(diameter,≥1 mm to<3 mm),moderate(≥3 mm to<10 mm),and severe(≥10 mm)was observed in 17,17,and 2 rats in the surgical group,respectively,while no dilation was observed in the control and sham surgical *** levels of alanine aminotransferase,aspartate aminotrans-ferase,total bilirubin,direct bilirubin,and total bile acids were significantly elevated in the surgical group as compared to the control group 7 d after surgery,while direct bilirubin,total bilirubin,and gamma-glutamyltransferase were further increased 14 d after *** of the biochemical indices gradually decreased to normal ranges 28 d after *** protein expression trend of signal transducer and activator of transcription 3 in rat model was consistent with the human CC *** The model of partial ligation of the bile duct of juvenile rats could morphologically simulate the cystic or fusiform CC,which may contribute to investigating the pathogenesis of CC.

关键词： Choledochal cyst Animal model Partial ligation Cystic and fusiform dilation Juvenile rats

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The relationship of blood cell-associated inflammatory indices and diabetic retinopathy: a Meta-analysis and systematic review

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International Journal of Ophthalmology(English edition) 2019年第2期12卷 312-323页

作者： wen-juan luo wen-Fang Zhang Department of Ophthalmology Lanzhou University Second Hospital

AIM: To explore the correlation between several blood cell-associated inflammatory indices including mean platelet volume(MPV), platelet distribution width(PDW), neutrophil to lymphocyte ratio(NLR) and platelet-lymphocyte ratio(PLR), and the presence and severity of diabetic retinopathy(DR). METHODS: We searched for eligible studies from PubMed, EMBASE, Web of Science and CNKI up to December 13, 2017. Standardized mean difference(SMD) calculated with confidence interval(CI) of 95% was used to estimate the values of those indices. RESULTS: A total of 31 studies were included in the present Meta-analysis. As compared with type 2 diabetes mellitus(T2 DM) patients without DR, the values of MPV, PDW, NLR, and PLR were higher in patients with DR(SMD=0.67; 95%CI: 0.36 to 0.98; SMD=0.51; 95%CI: 0.27 to 0.75; SMD=0.77; 95%CI: 0.49 to 1.05 and SMD=1.18; 95%CI: 0.07 to 2.28). Additionally, it was also observed that MPV was closely correlated with the severity of DR. CONCLUSION: MPV, PDW, NLR, and PLR could be recommended as diagnostic biomarkers for DR, and MPV could be applied to assess the severity of DR.

关键词： mean platelet volume platelet distribution width neutrophil to lymphocyte ratio platelet-lymphocyte ratio diabetic retinopathy

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Effect of recombinant human platelet-derived growth factor B on cat corneal endothelial cell viability mediated by adeno-associated virus

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International Journal of Ophthalmology(English edition) 2012年第4期5卷 419-423页

作者： wen-juan luo, Hui Li Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China Department of Pathology the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China Central Laboratory of the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China

AIM: To transduce recombinant human platelet-derived growth factor B (PDGF-B) gene adeno-associated virus(AAV) to in vitro cultured cat corneal endothelial cell (CEC) and observe the effect of the expressed PDGF-BB protein on the viability of cat CEC. METHODS: Cat cornea endothelium was torn under microscope and rapidly cultivated in DMEM to form single layer CEC and the passage 2 endothelial cells were used in this study. The recombinant human PDGF-B gene AAV was constructed and transduced into cat CEC directly. Three groups were as following: blank control group, AAV control group and recombinant AAV group. At 24 hours, 48 hours, and 5 days after transduction, total RNA was extracted from the CEC by Trizol and the expression of PDGF-B gene was detected by fluorescence quantitative polymerase chain reaction. Viability of the transduced CEC was detected at 48 hours after transduction by MTT assay. Cell morphology was observed under inverted phase contrast microscope. RESULTS: With the torn endothelium culture technique, we rapidly got single layer cat CEC. At 24 hours, 48 hours and 5 days after transduction, fluorescence quantitative polymerase chain reaction showed there was no significant difference of the expressed PDGF-B gene mRNA between blank control group and AAV control group (P>0.05). In contrast, there were significant differences between two control groups and recombinant AAV group (P<0.05). MTT assay showed that in recombinant AAV group, the expressed PDGF-BB protein could promote the viability of cat CEC. Morphology observation showed at 48 hours after transduction, cells in CEC-AAV-PDGF-B group proliferated into bigger scales in regular triangle to hexagon shape with distinct boundary, while the number of cells was significantly less in the two control groups. CONCLUSION: The recombinant AAV-PDGF-B expresses biological active PDGF-BB protein in cat CEC, which promotes the viability and proliferation of cells.

关键词： platelet-derived growth factor corneal endothelial cell transduction viability proliferation

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The study of human PDGF-B gene transferred to cat corneal endothelial cells

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International Journal of Ophthalmology(English edition) 2012年第1期5卷 18-22页

作者： wen-juan luo, Chuan-Fu Wang Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China School of Pharmacy Jiangxi Science and Technology Normal University Nan Chang 330013 Jiangxi Province China Department of Pathology the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China

AIM: To demonstrate that human platelet-derived growth factor-B (PDGF-B) cDNA could be Expressed in primary cultured cat corneal endothelia cells by using gene transfer techniques; to explore a useful tool for the further studies of the molecular mechanisms of corneal endothelium failure and provide a potential effective genetic therapy for the blind patients. ' METHODS: Human PDGF-B cDNA was isolated from human placent by RT-PCR and inserted into pcDNA(4) vector to construct recombinant eukaryotic expression plasmid pcDNA(4)-PDGF-B. The full length was confirmed by the DNA sequencing analysis. By tearing endothelium technique we obtained pure single layer of cat corneal endothelial cells. The pcDNA(4)-PDGF-B eukaryotic Expression vector was transferred into cat corneal endothelial cells by Effectene (TM) lipofectine. The transfection efficiency of Effectene (TM) lipofectine in pcDNA(4)-B was detected with pcDNA(4)-GFP. 5 days later, RT-PCR was used to check the PDGF-B expression. Cell viability was tested by modified tertrozalium salt (MU) method. Cell morphology was observed under inverted phase contrast microscope. RESULTS: The human PDGF-B cDNA was isolated successfully from healthy parturien placent tissue and the sequence was confirmed by computer automatic sequence and PCR analysis. Pure single layer cat corneal endothelial cells were successfully cultured by tearing endothelium technique. Effectene (TM) lipofectine transfection technique could be effectively used to transfer pcDNA(4)-PDGF-B into cat corneal endothelial cells in vitro, the transfection efficiency was 30%. RT-PCR result showed that human PDGF-B gene was highly expressed in transfected cat corneal endothelial cells. The expressed PDGF-BB protein promoted the viability of cat corneal endothelial cells. CONCLUSION: Human platelet-derived growth factor-B (PDGF-B) cDNA could be highly Expressed in cultured cat corneal endothelial cells by gene transfection techniques. Expressed PDGF-BB protein sign

关键词： platelet-derived growth factor corneal endothelial cell viability gene transfection.

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Effect of basic fibroblast growth factor on cat corneal endothelial cell proliferation

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 384-387页

作者： wen-juan luo Yang Zhou Mei-Guang Liu and Chuan-Fu Wang Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China

AIM: To investigate the function of basic fibroblast growth factor (bFGF) on cat corneal endothelial cells proliferation. METHODS: Cat corneal endothelial cells were primarily cultured, stimulated with bFGF for different period, the proliferation of cells was assayed by modified tertrozalium salt (MTT) method, and the morphologic changes were observed with inverted phase contrast microscope and transmission electron microscope. RESULTS: At 1, 3 and 5 days after bFGF was added to cat corneal endothelial cells, the result of MTT in 490nm showed significant difference than that in control group, and the difference was most significant in 10ng/mL group. CONCLUSION: bFGF can promote proliferation of cat corneal endothelial cells. 10ng/mL is the relatively most effective dose.

关键词： basic fibroblast growth factor corneal endothelial cells modified tertrozalium salt assay

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Human β-NGF gene transferred to cat corneal endothelial cells

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International Journal of Ophthalmology(English edition) 2016年第7期9卷 937-942页

作者： wen-juan luo Min Liu Gui-Qiu Zhao Chuan-Fu Wang Li-Ting Hu Xiang-Ping Liu Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University Central Laboratory of the Affiliated Hospital of Medical College Qingdao University

AIM： To transfect the cat corneal endothelial cells （CECs） with recombinant human β-nerve growth factor gene adeno-associated virus （AAV-β-NGF） and to observe the effect of the expressed β-NGF protein on the proliferation activity of cat CECs. METHODS： The endothelium of cat cornea was torn under the microscope and rapidly cultivated in Dulbecco＇s modified Eagle＇s medium （DMEM） to form single layer CECs and the passage 2 endothelial cells were used in this experiment. The recombinant human AAV-β-NGF was constructed. The recombinant human AAV-β-NGF was transferred into cat CECs directly. Three groups were as following： normal CEC control group, CEC-AAV control group and recombinant CEC- AAV-β-NGF group. Forty-eight hours after transfection, the total RNA was extracted from the CEC by Trizol. The expression of the β-NGF target gene detected by fluorescence quantitative polymerase chain reaction; proliferation activity of the transfected CEC detected at 48h by MTT assay; the percentage of G1 cells among CECs after transfect was detected by flow cytometry method （FCM）; cell morphology was observed under inverted phase contrast microscope. RESULTS： The torn endothelium culture technique rapidly cultivated single layer cat corneal endothelial cells. The self-designed primers for the target gene and reference gene were efficient and special confirmed through electrophoresis analysis and DNA sequencing. Forty-eight hours after transfect, the human β-NGF gene mRNA detected by fluorescence quantitative polymerase chain reaction showed that there was no significant difference between normal CEC control group and CEC-AAV control group （P〉0.05）; there was significant difference between two control groups and recombinant CEC-AAV-β-NGF group （P〈0.05）. MTT assay showed that transfect of recombinant AAV-β-NGF promoted the proliferation activity of cat CEC, while there was no significant difference between normal CEC control group and CEC-AAV control group （P〉0.05）. FCM result show

关键词： nerve growth factor corneal endothelialcell transfect proliferation

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Interventions to improve chronic cyclosporine A nephrotoxicity through inhibiting renal cell apoptosis： a systematic review

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Chinese Medical Journal 2013年第19期126卷 3767-3774页

作者： XIAO Zheng LI Cheng-wen SHAN juan luo Lei FENG Li LU Jun LI Sheng-fu LONG Dan LI You-ping Key Laboratory of Transplant Engineering and Immunology of Ministry Health of China West China Hospital Sichuan University ChengduSichuan 610041 China

Objective To reveal interventions for chronic cyclosporine A nephrotoxicity （CCN） and provide new targets for further studies,we analyzed all relevant studies about interventions in renal cell *** sources We collected all relevant studies about interventions for cyclosporine A （CsA）-induced renal cell apoptosis in Medline （1966 to July 2010）,Embase （1980 to July 2010） and ISI （1986 to July 2010）,evaluated their quality,extracted data following PICOS principles and synthesized the *** selection We included all relevant studies about interventions in CsA-induced renal cell apoptosis no limitation of research design and language） and excluded the duplicated articles,meeting abstracts and reviews without specific *** There were three kinds of intervention,include anti-oxidant （sulfated polysaccharides,tea polyphenols,apigenin,curcumin,spirulina,etc）,biologics （recombinant human erythropoietin （rhEPO）,a murine pan-specific transforming growth factor （TGF）-beta-neutralizing monoclonal antibody1D11,cartilage oligomeric matrix protein （COMP）-angiopoietin-1 and hepatocyte growth factor （HGF） gene）,and other drugs （spironolactone,rosiglitazone,pirfenidone and colchicine）.These interventions significantly improved the CCN,renal cell apoptosis and renal dysfunction through intervening in four apoptotic pathways in animals or protected renal cells from apoptosis induced by CsA and increased cell survival through respectively four pathways in *** There are three group interventions for *** anti-oxidant drugs can significantly improve CCN,renal cell apoptosis and renal *** drugs can improve CCN through intervening in Fas/Fas ligand or mitochondrial pathway with sufficient *** Ⅱ,nitric oxide （NO） and endoplasmic reticulum （ER） pathways will be new targets for CCN.

关键词： cyclosporine A interventions renal cells apoptosis chronic cyclosporine A nephrotoxicity

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Efficacy of intravitreal conbercept injection on short-and long-term macular edema in branch retinal vein occlusion

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International Journal of Ophthalmology(English edition) 2022年第3期15卷 489-494页

作者： Jing-Yi Bai wen-Ying Wang Zhi-Zhi Dou Bo-Chao Geng Xiao-Yan Xu Yuan-Zhang Zhu Shan-Yao Zhao Min Liu Shao-You Jia wen-juan luo Department of Ophthalmology Qingdao University Affiliated HospitalQingdao 266003Shandong ProvinceChina The People’s Hospital of Zoucheng City Jining 272000Shandong ProvinceChina

AIM: To observe the best-corrected visual acuity(BCVA) and central foveal thickness(CFT) repeatedly after the intravitreal injection of conbercept(IVC) for treating cystoid macular edema(CME) in branch retinal vein occlusion(BRVO) and explore the relationship between the duration of CME and visual ***: Subgroup analysis was performed to compare short-term(within 90 d of CME onset) and longterm(over 90 d of CME onset) macular edema in *** an initial IVC, a pro re nata(PRN) strategy was performed according to the recurrence of CFT or decrease of *** of variance using repeated measurements, statistical analysis following indicators including BCVA and CFT collected at baseline and 1, 3, and 6 mo after ***: Among the 60 cases included in this retrospective study, 36 were short-term CME, and 24 were long-term *** were statistical significances between and within groups of the BCVAs at different time points(P<0.001).The interaction was found between group and time(P=0.006), indicating the difference in the speed of BCVA improvement between *** particular, the improvement speed of BCVA in the short-term CME group was faster than that in the long-term CME *** were significant differences between and with groups of the CFT at different time points(P<0.001).However, the interaction between group and time in relation to CFT had no significant differences(P=0.59).CONCLUSION: IVC treatment for CME following BRVO is effective and *** duration of CME before treatment is a significant predictor of the visual outcomes of patients with *** improvement of vision might be faster with early IVC treatment than with delayed treatment.

关键词： vascular endothelial growth factor branch retinal vein occlusion conbercept best-corrected visual acuity macular edema

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Gear walk instability caused by brake-disc friction characteristics

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Chinese Journal of Aeronautics 2024年第2期37卷 343-359页

作者： Xiaoqiong DU Bin LI wen CAI Linyin luo School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Department of Mechanical Engineering University of MichiganAnn Arbor 48109USA AVIC General Huanan Aircraft Industry Co.Ltd. Zhuhai 519040China

A multi-body dynamic rigid-flexible coupling model of landing gear is established to study the gear walk instability caused by the friction characteristics of the brake *** validating the model with the experimental results,the influence of the landing gear structure and braking system parameters on gear walk is further *** the above factors,the slope of the graph for the friction coefficient of the brake disc and the relative velocity of brake stators and rotors is the most influential factor on gear walk *** trajectory analysis verifies that gear walk occurs when the coupling of multiple factors causes the system to exhibit an equivalent negative damping *** consider a more realistic braking case,a back propagation neural network method is employed to describe the nonlinear behavior of the friction coefficient of the brake *** the realistic nonlinear model of the friction coefficient,the maximum error in predicting the braking torque is less than 10%and the effect of the brake disc temperature on gear walk is *** results reveal that a more negative friction slope may contribute to a more severe unstable gear walk,and reducing the braking pressure is an effective approach to avoid gear walk,which provides help for future braking system design.

关键词： Gear walk Friction characteristics of brake disc Brake-induced vibration Negative damping Rigid-flexible coupling Negative slope of braking torque

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