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Casein kinase-2 inhibition promotes retinal ganglion cell survival after acute intraocular pressure elevation

Neural Regeneration Research 2024年第5期19卷 1112-1118页

作者： Meng Wang Shi-Qi Yao Yao Huang Jia-Jian Liang Yanxuan Xu Shaowan Chen Yuhang Wang tsz kin ng Wai Kit Chu Qi Cui Ling-Ping Cen Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong ShantouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina Beijing Tongren Eye Center Beijing Tongren HospitalCapital Medical UniversityBeijingChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong Kong Special Administrative RegionChina

Intraocular pressure elevation can induce retinal ganglion cell death and is a clinically reversible risk factor for glaucoma,the leading cause of irreversible *** previously demonstrated that casein kinase-2 inhibition can promote retinal ganglion cell survival and axonal regeneration in rats after optic nerve *** investigate the underlying mechanism,in the current study we increased the intraocular pressure of adult rats to 75 mmHg for 2 hours and then administered a casein kinase-2 inhibitor(4,5,6,7-tetrabromo-2-azabenzimidazole or 2-dimethylamino-4,5,6,7-tetrabromo-1H-benzimidazole)by intravitreal *** found that intravitreal injection of 4,5,6,7-tetrabromo-2-azabenzimidazole or 2-dimethylamino-4,5,6,7-tetrabromo-1H-benzimidazole promoted retinal ganglion cell survival and reduced the number of infiltrating *** analysis showed that the mitogen activated protein kinase signaling pathway was involved in the response to intraocular pressure elevation but was not modulated by the casein kinase-2 ***,casein kinase-2 inhibition downregulated the expression of genes(Cck,Htrsa,Nef1,Htrlb,Prph,Chat,Slc18a3,Slc5a7,Scn1b,Crybb2,Tsga10ip,and Vstm21)involved in intraocular pressure *** data indicate that inhibition of casein kinase-2 can enhance retinal ganglion cell survival in rats after acute intraocular pressure elevation via macrophage inactivation.

关键词： casein kinase-2 glaucoma intraocular pressure elevation macrophages retinal ganglion cells

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Stem cell therapy for retinal ganglion cell degeneration

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Neural Regeneration Research 2018年第8期13卷 1352-1353页

作者： Ling-Ping Cen tsz kin ng Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong Shantou Guangdong Province China Shantou University Medical College Shantou Guangdong China Department of Ophthalmology and Visual Sciences The Chinese University of Hong Kong Hong Kong Special Administrative Region China

The prospects of stem cell therapy for retinal ganglion cell （RGC） degeneration in human： RGC degeneration is a common pathologic cause of glaucoma and optic neuropathies, which are the leading cause of irreversible blindness and visual impairment in developed coun- tries, currently affecting more than 100 million people worldwide.

关键词： OPTIC-NERVE INJURY NEUROPROTECTION REGENERATION CRUSH

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Growth hormone-releasing hormone receptor signaling in experimental ocular inflammation and neuroprotection

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Neural Regeneration Research 2022年第12期17卷 2643-2648页

作者： Ling-Ping Cen tsz kin ng Wai Kit Chu Chi Pui Pang Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong ShantouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong Kong Special Administrative RegionChina

Both inflammation and anti-inflammation are involved in the protection of retinal *** of the hypothalamic growth hormone-releasing hormone receptor(GHRHR)have been shown to possess potent anti-inflammatory properties in experimental disease models of various organs,some with systemic *** effects are also found in ocular inflammatory and neurologic injury *** experimental models of mice and rats,both growth hormone-releasing hormone receptor agonists and antagonists may alleviate death of ocular neural cells under certain experimental *** review explores the properties of growth hormone-releasing hormone receptor agonists and antagonists that lead to its protection against inflammatory responses induced by extrinsic agents or neurologic injures in ocular animal models.

关键词： neuroprotection ocular inflammation optic nerve injury retinal ganglion cells uveitis

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Peritoneal macrophages attenuate retinal ganglion cell survival and neurite outgrowth

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Neural Regeneration Research 2021年第6期16卷 1121-1126页

作者： Jia-Jian Liang Yu-Fen Liu tsz kin ng Ci-Yan Xu Mingzhi Zhang Chi Pui Pang Ling-Ping Cen Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong ShantouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina Department of Ophthalmology and Visual Sciences the Chinese University of Hong KongHong Kong Special Administrative RegionChina

Inflammation is a critical pathophysiological process that modulates neuronal survival in the central nervous system after disease or ***,the effects and mechanisms of macrophage activation on neuronal survival remain *** the present study,we co-cultured adult Fischer rat retinas with primary peritoneal macrophages or zymosan-treated peritoneal macrophages for 7 *** analysis revealed that peritoneal macrophages reduced retinal ganglion cell survival and neurite outgrowth in the retinal explant compared with the control *** addition of zymosan to peritoneal macrophages attenuated the survival and neurite outgrowth of retinal ganglion *** media from peritoneal macrophages also reduced retinal ganglion cell survival and neurite *** result suggests that secretions from peritoneal macrophages mediate the inhibitory effects of these *** addition,increased inflammationand oxidation-related gene expression may be related to the enhanced retinal ganglion cell degeneration caused by zymosan *** summary,this study revealed that primary rat peritoneal macrophages attenuated retinal ganglion cell survival and neurite outgrowth,and that macrophage activation further aggravated retinal ganglion cell *** study was approved by the Animal Ethics Committee of the Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong,Shantou,Guangdong Province,China,on March 11,2014(approval ***20140311(2)-P01).

关键词： in vitro inflammation macrophages model neurite outgrowth optic nerve retinal ganglion cells survival

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WJSC 6^(th) Anniversary Special Issues(2):Mesenchymal stem cells Progress of mesenchymal stem cell therapy for neural and retinal diseases

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World Journal of Stem Cells 2014年第2期6卷 111-119页

作者： tsz kin ng Veronica R Fortino Daniel Pelaez Herman S Cheung Geriatric Research Education and Clinical CenterMiami Veterans Affairs Medical Center Department of Ophthalmology and Visual Sciences The Chinese University of Hong Kong Department of Biomedical Engineering College of EngineeringUniversity of Miami

Complex circuitry and limited regenerative power make central nervous system(CNS)disorders the most challenging and difficult for functional *** elusive disease mechanisms,traditional surgical and medical interventions merely slow down the progression of the neurodegenerative ***,the number of neurons still diminishes in many ***,stem cell therapy has been proposed as a viable *** stem cells(MSCs),a widely-studied human adult stem cell population,have been discovered for more than 20 *** have been found all over the body and can be conveniently obtained from different accessible tissues:bone marrow,blood,and adipose and dental *** have high proliferative and differentiation abilities,providing an inexhaustible source of neurons and glia for cell replacement ***,MSCs also show neuroprotective effects without any genetic modification or *** addition,the extraordinary immunomodulatory properties of MSCs enable autologous and heterologous *** qualities heighten the clinical applicability of MSCs when dealing with the pathologies of CNS ***,we summarize the latest progress of MSC experimental research as well as human clinical trials for neural and retinal *** review article will focus on multiple sclerosis,spinal cord injury,autism,glaucoma,retinitis pigmentosa and age-related macular degeneration.

关键词： Mesenchymal stem cells Stem cell therapy Central nervous system Retina Clinical trial

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A Registry-Based Observational Study on the Maternal and Fetal Outcomes of COVID-19 Patients in Hong Kong,China

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Maternal-Fetal Medicine 2024年第3期6卷 156-163页

作者： Hillary HY Leung Teresa WL Ma Florrie NY Yu Meliza CW Kong tsz kin Lo Pauline PL So Wing-Cheong Leung Wendy Shu Ka Wang Cheung Sakita Moungmaithong Chi Chiu Wang Liona C.Poon Department of Obstetrics and Gynaecology The Chinese University of HongKongHong Kong 999077China Department of Obstetrics and Gynaecology Queen Elizabeth HospitalHong Kong 999077China Department of Obstetrics and Gynaecology United Christian HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Princess Margaret HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Tuen Mun HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Kwong Wah HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Pamela Youde Nethersole Eastern HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Queen Mary HospitalHong Kong 999077China

Objective:To report the clinical maternal and fetal outcomes of pregnant women with coronavirus disease 2019(COVID-19),along with any associated pregnancy complications,in Hong Kong,China,and to assess the impact of COVID-19 vaccination on these ***:This prospective registry-based observational study included pregnant women who were recruited through convenient sampling and had a laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection with a cycle threshold(Ct)value result available on admission to eight local hospitals in Hong Kong,*** on clinical symptoms,laboratory results,medical treatments,delivery timing and mode,and pregnancy complications were extracted from the Hospital Authority’s electronic medical record ***,fetal,and pregnancy outcomes were compared between unvaccinated pregnant women with COVID-19 and those who had received at least one dose of COVID-19 vaccine before *** continuous variables and categorical variables were analyzed using the Mann-Whitney U test and the Pearson’s chi-squared test respectively.A P value less than 0.05 was considered statistically ***:A total of 164 pregnant women were included,of whom 78(47.56%)were ***-19 was diagnosed before 28 weeks’gestation in 30(18.29%),while 134(81.71%)were diagnosed at or after 28 weeks’***-two(37.80%)women received at least one dose of COVID-19 *** were no significant differences between vaccinated and unvaccinated groups in the time interval between COVID-19 diagnosis and delivery,the Ct value,and the gestational age at infection onset or delivery(P>0.05).The majority of women were symptomatic at diagnosis regardless of vaccination status 55(88.71%)in vaccinated group vs.78(76.47%)in unvaccinated group(P=0.052).Symptoms did not significantly differ between groups except for cough(62.90%vs.47.06%,P=0.049).The overall rate of severe COVID-19 in pregnant women was *** t

关键词： COVID-19 Maternal outcomes Fetal outcomes Pregnancy complications Severe COVID-19

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Surgical cystogastrostomy: Is it still worthwhile?

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World Journal of Gastroenterology 2024年第17期30卷 2298-2301页

作者： kin Pan Au Kenneth Siu Ho Chok Department of Surgery Queen Mary HospitalThe University of Hong KongHong Kong 999077China Department of Surgery The Chinese University of Hong KongHong Kong 999077China

The article by Ker et al explores the treatment of peripancreatic fluid collection(PFC).The use of percutaneous drainage,endoscopy,and surgery for managing PFC are *** drainage is noted for its low risk profile,while endoscopic cystogastrostomy is more effective due to the wider orifice of the metallic *** cystogastrostomy is a definitive treatment with a reduced need for reintervention,especially for cases with extensive collections and significant *** choice of treatment modality should be tailored to individual patient characteristics and disease factors,considering the expertise available.

关键词： Endoscopic cystgastrostomy Surgical cystgastrostomy Pancreatitis Pancreatic necrosis Peripancreatic collection

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Characterization of a smog chamber for studying formation of gas-phase products and secondary organic aerosol

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Journal of Environmental Sciences 2024年第2期136卷 570-582页

作者： Qi Yuan Zhuozhi Zhang Meng Wang kin Fai Ho Tao Wang Shuncheng Lee Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina School of Public Health and Primary Care The Chinese University of Hong KongShatinHong KongChina

Smog chambers provide a potent approach to explore the secondary organic aerosol formation under varied *** study describes the construction and characterization of a new smog chamber facility for studying the formation mechanisms of gas-phase products and secondary organic aerosol from the photooxidation of volatile organic *** chamber is a 5.4 m^(3) Fluorinated Ethylene Propylene(FEP)Teflon reactor with the potential to perform photooxidation experiments at controlled temperature and relative *** characterizations were conducted for evaluation of stability of environmental parameters,mixing time,background contamination,light intensity,and wall losses of gases and *** photolysis rate of NO_(2)(J_(NO2))ranged from(1.02-3.32)×10^(-3)sec^(-1),comparable to the average J_(NO2)in ambient *** wall loss rates for NO,NO_(2),and O_(3)were 0.47×10^(-4),0.37×10^(-4),and 1.17×10^(-4)min^(-1),while wall loss of toluene was obsoletely found in a 6 hr *** particle number wall loss rates are(0.01-2.46)×10^(-3)min^(-1)for 40-350 nm with an average lifetime of more than one day.A series of toluene photooxidation experiments were carried out in absence of NO_xunder dry *** results of the simulation experiments demonstrated that the chamber is well designed to simulate photolysis progress in the atmosphere.

关键词： Smog chamber Gas-phase oxidation Chamber characterization Chemical mechanism

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Regulation of PM_(2.5)on mitochondrial damage in H9c2 cells through miR-421/SIRT3 pathway and protective effect of miR-421 inhibitor and resveratrol

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Journal of Environmental Sciences 2024年第4期138卷 288-300页

作者： Shanshan Chen Wenqi Chen Zhiping Li Jianwei Yue Ken kin Lam Yung Ruijin Li Institute of Environmental Science Shanxi UniversityTaiyuan 030006China Institute of Judicial Identification Techniques for Environmental Damage Shanxi University and Shanxi Unisdom Testing Technology Co.Ltd.Taiyuan 030006China Department of Biology Hong Kong Baptist UniversityHong KongChina Shanxi Yellow River Laboratory Taiyuan 030006China

Fine particulate matter(PM_(2.5))exposure is associated with cardiovascular disease(CVD)morbidity and *** are sensitive targets of PM_(2.5),and mitochondrial dysfunction is closely related to the occurrence of *** epigenetic mechanism of PM_(2.5)-triggered mitochondrial injury of cardiomyocytes is *** study focused on the mi R-421/SIRT3 signaling pathway to investigate the regulatory mechanism in cardiac mitochondrial dynamics imbalance in rat H9c2 cells induced by PM_(2.5).Results illustrated that PM_(2.5)impaired mitochondrial function and caused dynamics homeostasis ***,PM_(2.5)up-regulated mi R-421 and down-regulated SIRT3 gene expression,along with decreasing p-FOXO3a(SIRT3 downstream target gene)and p-Parkin expression and triggering abnormal expression of fusion gene OPA1 and fission gene ***,mi R-421 inhibitor(mi R-421i)and resveratrol significantly elevated the SIRT3 levels in H9c2 cells after PM_(2.5)exposure and mediated the expression of SOD2,OPA1 and Drp1,restoring the mitochondrial morphology and *** suggests that mi R-421/SIRT3 pathway plays an epigenetic regulatory role in mitochondrial damage induced by PM_(2.5)and that mi R-421i and resveratrol exert protective effects against PM_(2.5)-incurred cardiotoxicity.

关键词： Fine particulate matter Rat H9c2 cells Mitochondrial damage MiR-421 SIRT3 Resveratrol

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Inferior vena cava reconstruction in extended right hepatectomy

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Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 533-534页

作者： Karin KY Ho Sui Ling Sin kin Pan Au Henry HY Lee Daniel TL Chan Albert Chan Department of Surgery The University of Hong Kong102 Pok Fu Lam RoadHong KongChina Department of Surgery Yan Chai Hospital7 Yan Chai StreetHong KongChina State Key Laboratory of Liver Research(Li Ka Shing Faculty of Medicine The University of Hong Kong)102 Pok Fu Lam RoadHong KongChina

To the Editor : Barcelona Clinic Liver Cancer(BCLC) Stage C hepatocellular carcinoma(HCC) with vascular invasion has been considered unresectable. However, the curative rate from systemic treatment is rather dismal. Even with the use of immunotherapy, complete remission is less than 10% [ 1 ]. On the contrary, recent advances in transplant oncology, especially in the application of liver transplant-related surgical techniques in complex liver resections, make the operation possible for patients with locally advanced HCC who were previously considered to be unresectable [ 2 ]. We hereby present the surgical management of a patient with giant HCC in right liver lobe with inferior vena cava(IVC) invasion.

关键词： invasion vena Liver

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