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Chiral multiple-resonance thermally activated delayed fluorescence materials based on chiral spiro-axis skeleton for efficient circularly polarized electroluminescence

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Science China Chemistry 2024年第7期67卷 2257-2264页

作者： Shi-Quan Song Xiao Han Zhong-Zhong Huo ching-fai yip Xian-Fang Hong Meng-Ning Ding You-Xuan Zheng State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Chiral luminescence materials have potential applications in the field of three-dimensional displays due to their circularly polarized luminescence(CPL)***,the further development of circularly polarized organic light-emitting diodes(CP-OLEDs)needs to meet the requirements of high efficiency,high color purity,low cost,and high dissymmetry factor(gPLor gEL),chiral multiple resonance thermally activated delayed fluorescence(MR-TADF)materials are considered as candidates in these ***,based on a pair of chiral spirofluorene precursors,two pairs of high-performance chiral MR-TADF emitters((R/S)-p-Spiro-DtBuCzB and(R/S)-m-Spiro-DtBuCzB)are developed,which exhibit strong emissions peaking at 491 and 502 nm in toluene with full-width at half-maximum values of 25 and 33 nm,*** addition,small singlet–triplet energy gaps of 0.15 and 0.10 eV with high absolute photoluminescence efficiencies of 95.0%and 96.7%are observed for p-Spiro-DtBuCzB and m-Spiro-DtBuCzB molecules,*** based on p-Spiro-DtBuCzB and m-Spiro-DtBuCzB display high maximum external quantum efficiencies of 29.6%and 33.8%,*** importantly,CP-OLEDs present symmetric circularly polarized electroluminescence spectra with|gEL|factors of 3.36×10^(-4)and 7.66×10^(-4)for devices based on(R/S)-p-Spiro-DtBuCzB and(R/S)-m-Spiro-DtBuCzB enantiomers,respectively.

关键词： chiral spiro-axis skeleton-based material multiple resonance thermally activated delayed fluorescence circularly polarized electroluminescence dissymmetry factor external quantum efficiency

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A prospective cohort of men with localized prostate cancer on active surveillance protocol in Hong Kong,China:what did we learn?

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Asian Journal of Andrology 2024年第3期26卷 245-249页

作者： Xiaobo Wu Ivan ching-Ho Ko Cindy Yeuk-Lam Hong Samuel Chi-Hang Yee Jeremy Yuen-Chun Teoh Samson Yun-Sang Chan Ho-Man Tam Chi-Kwok Chan Chi-fai Ng Peter Ka-Fung Chiu SH Ho Urology Centre Department of SurgeryFaculty of MedicineThe Chinese University of Hong KongHong KongChina

This study aimed to report the outcomes of active surveillance(AS)in the management of low-risk prostate cancer(PCa).It recruited87 men who were prospectively followed up according to the Prostate Cancer Research International Active Surveillance(PRIAS)protocol with local adaptation at SH Ho Urology Centre,Prince of Wales Hospital,Hong Kong,*** investigated the predictorsof disease progression and found that baseline prostate-specific antigen density(PSAD)and the presence of the highest ProstateImaging-Reporting and Data System(PI-RADS)score 5 lesion on magnetic resonance imaging(MRI)are significantly correlatedwith disease ***,men with PSAD>0.2 ng ml^(−2)or PI-RADS 4 or 5 lesions had significantly worse upgradingfree survival compared to those with PSAD≤0.2 ng ml−2 and PI-RADS 2 or 3 *** study concludes that AS is a safe andeffective management strategy for selected patients to defer radical treatment and that most disease progression can be detectedafter the first repeated *** combination of PSAD>0.2 ng ml^(−2)and PI-RADS 4 or 5 lesions may serve as a useful predictorof early disease progression and provide a guide to optimize follow-up protocols for men in different risk groups.

关键词： active surveillance cohort localized prostate cancer

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Effects of SARS-CoV-2 infection on incidence and treatment strategies of hepatocellular carcinoma in people with chronic liver disease

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World Journal of Hepatology 2024年第2期16卷 211-228页

作者： Lung-Yi Mak Matthew Shing Hin Chung Xue Li Francisco Tsz Tsun Lai Eric Yuk fai Wan Celine Sze Ling Chui Franco Wing Tak Cheng Esther Wai Yin Chan ching Lung Cheung Ivan Chi Ho Au Xi Xiong Wai-Kay Seto Man-Fung Yuen Carlos King Ho Wong Ian Chi Kei Wong Department of Medicine The University of Hong KongHong KongChina State Key Laboratory of Liver Research The University of Hong KongHong KongChina Department of Pharmacology and Pharmacy The University of Hong KongHong KongChina Laboratory of Data Discovery for Health(D24H) Hong Kong Science and Technology ParkHong KongChina Department of Family Medicine and Primary Care The University of Hong KongHong KongChina School of Nursing The University of Hong KongHong KongChina School of Public Health The University of Hong KongHong KongChina Research Department of Practice and Policy University College LondonLondon WC1E 6BTUnited Kingdom Aston School of Pharmacy Aston UniversityBirmingham B47ETUnited Kingdom

BACKGROUND Chronic liver disease(CLD)was associated with adverse clinical outcomes among people with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)*** To determine the effects of SARS-CoV-2 infection on the incidence and treatment strategy of hepatocellular carcinoma(HCC)among patients with *** A retrospective,territory-wide cohort of CLD patients was identified from an electronic health database in Hong *** with confirmed SARS-CoV-2 infection[coronavirus disease 2019(COVID-19)+CLD]between January 1,2020 and October 25,2022 were identified and matched 1:1 by propensity-score with those without(COVID-19-CLD).Each patient was followed up until death,outcome event,or November 15,*** outcome was incidence of *** outcomes included all-cause mortality,adverse hepatic outcomes,and different treatment strategies to HCC(curative,non-curative treatment,and palliative care).Analyses were further stratified by acute(within 20 d)and post-acute(21 d or beyond)phases of SARS-CoV-2 *** rate ratios(IRRs)were estimated by Poisson regression *** Of 193589 CLD patients(>95%non-cirrhotic)in the cohort,55163 patients with COVID-19+CLD and 55163 patients with COVID-19-CLD were included after 1:1 propensity-score *** 249-d median follow-up,COVID-19+CLD was not associated with increased risk of incident HCC(IRR:1.19,95%CI:0.99-1.42,P=0.06),but higher risks of receiving palliative care for HCC(IRR:1.60,95%CI:1.46-1.75,P<0.001),compared to *** both acute and post-acute phases of infection,COVID-19+CLD were associated with increased risks of allcause mortality(acute:IRR:7.06,95%CI:5.78-8.63,P<0.001;post-acute:IRR:1.24,95%CI:1.14-1.36,P<0.001)and adverse hepatic outcomes(acute:IRR:1.98,95%CI:1.79-2.18,P<0.001;post-acute:IRR:1.24,95%CI:1.13-1.35,P<0.001),compared to *** Although CLD patients with SARS-CoV-2 infection were not associated with increased risk of HCC,they

关键词： SARS-CoV-2 infection Chronic liver disease Long COVID Post-COVID-19 syndrome Cirrhosis Hepatocellular carcinoma

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Late retroperitoneal recurrence of hepatocellular carcinoma 12 years after initial diagnosis

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World Journal of Gastroenterology 2010年第17期16卷 2187-2189页

作者： Tiffany Cho-Lam Wong Ka-fai To Simon See-Ming Hou Sidney Kam-Hung yip Chi-fai Ng Department of Surgery Prince of Wales HospitalThe Chinese University of Hong Kong Department of Anatomical and Cellular Pathology The Chinese University of Hong Kong

Hepatocellular carcinoma (HCC) is an aggressive tumor with poor long-term ***,we present an unusual patient with a solitary recurrence of HCC in the right kidney 12 years after the initial *** illustrates the importan... 详细信息

关键词： Hepatocellular carcinoma Late recurrence Metastasis Retroperitoneal

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Pre-ischemia electro-acupuncture potentiates the expression of Bcl-2 and transforming growth factor-beta 1 in rat brains

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Neural Regeneration Research 2012年第24期7卷 1859-1865页

作者： Ka Keung yip Samuel CL Lo Kwok-fai So Dora MY Poon Mason CP Leung Department of Rehabilitation Sciences the Hong Kong Polytechnic UniversityHung HomHong Kong Special Administrative RegionChina Department of Applied Biology and Chemical Technology the Hong Kong Polytechnic UniversityHung HomHong Kong Special Administrative RegionChina Department of Anatomy the University of Hong KongPokfulamHong Kong Special Administrative RegionChina

The expression of the anti-apoptotic molecules Bcl-2 and transforming growth factor-beta 1 is known to confer protective effects on the cerebral ischemia-reperfusion *** current study investigated the expression levels of Bcl-2 and transforming growth factor-beta 1 in response to multiple pre-ischemia electro-acupuncture at acupoints Zusanli（ST36）and Fengchi（GB20） *** were divided into five groups：uninjured,control,non-acupoint,GB20 and ST36. Rats in the non-acupoint,GB20 and ST36 groups received 30 minutes（3 times or 18 times）of electro-acupuncture stimulation before experimental cerebral ischemia was ***-2 and transforming growth factor-beta 1 were found to be significantly increased in the ST36 groups with either 3 or 18 electro-acupuncture treatments（P〈0.05）.The production was higher with 18 electro-acupuncture treatments in the ST36 groups（P〈0.05）.In the GB20 groups,significant increase was only observed in transforming growth factor-beta 1 with 18 electro-acupuncture treatments（P〈0.05）.No significant elevation of the level of transforming growth factor-beta 1 was observed in the non-acupoint ***,the production of Bcl-2 increased with 18 treatments in the non-acupoint groups（P〈0.05）.The data suggest that multiple pre-ischemia electro-acupuncture at ST36 was effective in conferring neuroprotective effect on the brain by means of upregulation of Bcl-2 and transforming growth factor-beta 1 and the effect was increase with the number of treatment.

关键词： cerebral ischemia stroke prevention electro-acupuncture transforming growth factor-beta 1 Bcl-2 acupoint

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Ferroptosis and glaucoma: implications in retinal ganglion cell damage and optic nerve survival

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Neural Regeneration Research 2023年第3期18卷 545-546页

作者： Ming Yang Kwok-fai So Wai-ching Lam Amy Cheuk Yin Lo Department of Ophthalmology School of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Sciences The University of Hong KongHong Kong Special Administrative RegionChina GHM Institute of CNS Regeneration Jinan UniversityGuangzhouGuangdong ProvinceChina

Glaucoma and visual pathway degeneration:Glaucoma is the leading cause of irreversible blindness worldwide,which leads to a progressive loss of *** can be classified into two types:primary open-angle glaucoma and primary closed-angle *** open-angle glaucoma can be caused by the blockage of the trabecular meshwork,and this results in elevation of the intraocular pressure(IOP),leading to retinal ganglion cell(RGC)***,many glaucoma patients have normal IOP;this is known as normal-tension ***,excitotoxic damage and oxidative stress can also lead to RGC damage in normal-tension glaucoma(Almasieh et al.,2012).Glaucomatous genes such as TIGR,OPTN,and CYP1B1 have been suggested to contribute to the pathogenesis of ***,some glaucomatous patients may remain asymptomatic in the early,moderate,and late *** type of glaucoma is primary closed-angle *** this clinical condition,a relative pupillary block is contributed by the iris obstructing aqueous *** patients may suffer from corneal swelling,headache,nausea,and blurred vision during the acute phase.

关键词： glaucoma damage degeneration

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Randomized controlled trial of antibiotic prophylaxis regimens for transrectal ultrasound-guided prostate biopsy

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Chinese Medical Journal 2012年第14期125卷 2432-2435页

作者： CHAN Eddie Shu-yin LO Ka-lun NG Chi-fai HOU See-ming yip Sidney Kam-hung Division of Urology Department of Surgery 4/F. Clinical ScienceBuilding Prince of Wales Hospital Chinese University of HongKong Shatin Hong Kong SAR China

Background A prior study showed aimed to evaluate and compare the transrectal ultrasound-guided prostate Methods A prospective randomized significant antibiotic resistance to quinolone in our population. In this study we efficacy of a single versus a combined prophylactic antibiotic regimen before biopsy （TRUGPB）. study was conducted at a university hospital. Patients undergoing TRUGPB were randomized into an amoxicillin-clavulanate alone （1 mg; one dose before and two doses after biopsy） or an amoxicillin-clavulanate ＋ ciprofloxacin group （250 mg; one dose before and two doses after biopsy）. Patients were surveyed for infection symptoms by phone on days 3 and 30 after TRUGPB. We defined an infective complication as the occurrence of symptoms including fever, chills or rigor within 30 days after prostate biopsy, requiring medical treatment or hospitalization, aided by a territory-wide electronic medical record system. Results Between November 2007 and July 2009, 367 patients were randomized to either amoxicillin-clavulanate alone or amoxicillin-clavulanate ＋ ciprofloxacin group. The infection rates after TRUGPB were 3.91% in the former group （7 out of 179 patients） versus 0.53% （1 out of 188 patients） in the latter. Sixty-three percent （5/8） of patients with infective complications needed hospitalization. There was no intensive care unit admission or mortality during the study period. Conclusions Combining prophylactic antibiotics with amoxicillin-clavulanate ＋ ciprofloxacin significantly reduced the incidence of infective complications after TRUGPB. We recommended a combination regimen, especially in centre with high incidence of post-TRUGPB infection.

关键词： antibiotic prophylaxis, biopsy, prostate, complications

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Lycium barbarum extract promotes M2 polarization and reduces oligomeric amyloid-β-induced inflammatory reactions in microglial cells

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Neural Regeneration Research 2022年第1期17卷 203-209页

作者： Zhong-Qing Sun Jin-Feng Liu Wei Luo ching-Hin Wong Kwok-fai So Yong Hu Kin Chiu Department of Ophthalmology Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Sciences The University of Hong KongHong Kong Special Administrative RegionChina Guangdong-Hong Kong-Macao Institute of CNS Regeneration Jinan UniversityGuangzhouGuangdong ProvinceChina Department of Orthopaedics&Traumatology The University of Hong KongHong Kong Special Administrative RegionChina

Lycium barbarum(LB)is a traditional Chinese medicine that has been demonstrated to exhibit a wide variety of biological functions,such as antioxidation,neuroprotection,and immune *** of the main mechanisms of Alzheimer’s disease is that microglia activated by amyloid beta(Aβ)transform from the resting state to an M1 state and release pro-inflammatory cytokines to the surrounding *** the present study,immortalized microglial cells were pretreated with *** extract for 1 hour and then treated with oligomeric Aβfor 23 *** results showed that LB extract significantly increased the survival of oligomeric Aβ-induced microglial cells,downregulated the expression of M1 pro-inflammatory markers(inducible nitric oxide synthase,tumor necrosis factorα,interleukin-6,and interleukin-1β),and upregulated the expression of M2 anti-inflammatory markers(arginase-1,chitinase-like protein 3,and interleukin-4).LB extract also inhibited the oligomeric Aβ-induced secretion of tumor necrosis factorα,interleukin-6,and interleukin-1βin microglial *** results of in vitro cytological experiments suggest that,in microglial cells,LB extract can inhibit oligomeric Aβ-induced M1 polarization and concomitant inflammatory reactions,and promote M2 polarization.

关键词： Alzheimer’s disease amyloid-β anti-inflammatory factors Lycium barbarum extract M1 microglia M2 microglia neuroinflammation proinflammatory factors

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Self-harm attempters' perception of community services and its implication on service provision

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International Journal of Nursing Sciences 2019年第1期6卷 50-57页

作者： Ming Leung Chun-Bong Chow Pak-Keung Patrick Ip Siu-fai Paul yip Central Nursing Division Princess Margaret HospitalHKSARChina Department of Paediatrics and Adolescent Medicine LKS Faculty of MedicineThe University of Hong KongHKSARChina Hospital Authority Infectious Disease Centre Princess Margaret HospitalHKSARChina Department of Paediatrics and Adolescent Medicine The University of Hong Kong-Shen Zhen HospitalShen ZhenChina Department of Social Work and Social Administration The University of Hong KongHKSARChina Jockey Club Center of Suicide Research and Prevention The University of Hong KongHKSARChina

Objective:This study aimed at exploring the attempters'perception of community social services included any barriers to seeking help and ***:The participants were patients with self-harming behavior aged 15 years or above.A set of guiding questions were designed to explore the general barriers and accessibility to community social services.A voice recording was made,which was later converted into a text transcript and then preceded for content analysis with co-occurrence and similarity matrix *** males and nine females with a history of self-harm aged between 24 and 58 years were recruited for the ***:The participants had diverse experiences and backgrounds,and attitudes toward community social ***,there was a shared perception of the need to enhance community social *** were four main themes and 12 sub themes *** main theme included the service availability,service accessibility,affordability and *** details,participants were unaware of the available types of care/social services in the community,and were unaware about the nearby social *** also suggested extending service hours and focused services should be offered to help people with different backgrounds and ***,those with experience of service utilization had both positive and negative perspectives and they gave suggestions for service delivery,mainly extending service hours and offering focused services such as for gambling control and financial *** view of interaction with service providers,counseling skills and trust were highly appreciated by the ***:The results identified common circumstances of falling into financial hardship(gambling)and social fragmentation(divorce,poor family relationships,and poor marital relationships),which also suggested to enhance services on center location,service arrangement,and skill of caregivers.

关键词： Cognition Community health services Patients Self mutilation

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Recurrent Cardiac Tamponade from Right Atrial Angiosarcoma

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Chinese Medical Journal 2018年第11期131卷 1379-1380页

作者： Na-Qiong Wu Edmundo Patricio Lopes Lao U Po Lain Yuk ching yip Mario Evora Division of Dyslipidemia State Key Laboratory of Cardiovascular Disease FuWai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100037 China Department of Cardiology Centro Hospitalar Conde de Sao Januario Macao China Department of Pathology Kiang Wu Hospital Macao China

To the Editor： A 70-year-old Chinese gentleman with end-stage renal disease on intermittent peritoneal dialysis （IPD） was admitted to nephrology ward for regular IPD therapy in August 2016. After admission, he presented sudden lower back pain with significant anemia. Computed tomography （CT） scan showed large amount of pericardial effusion, bilateral pleural effusion, and ascites in abdomen and pelvis. Later on, he was intubated with mechanical ventilation support and on continuous venovenous hemofiltration. Pericardiocentesis and thoracocentesis were performed. On the 9＂ day of admission.

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