1. Important role of Rho/ROCK2 pathway in the development of Alzheimer’s disease
Journal of International Pharmaceutical Research 2016;43(1):33-38
Rho/ROCK pathway is a ubiquitous singling pathway in organisms, and is involved in many biological processes. In the brain of Alzheimer’s patients, the activities of Rho and Rho associated coiled coil forming protein kinase(ROCK)are up-regulated, which is accompanied by the elevation of Aβ42 level, and the abnormal change of the morphology and function of neuronal processes, suggesting that the occurrence and development of Alzheimer’s disease(AD)is associafed with the overexpression and excessive activation of Rho or ROCK. Rho/ROCK2 pathway is considered a target pathway for the prevention and treatment of AD, and Rho or ROCK2 also becomes an important target for AD drug development. Numerous studies have revealed that suppressing the expression or decreasing the activity of Rho or ROCK2 can reduce Aβ42-induced neurotoxicity, protect neurons, and slow down the occurrence and de velopment of AD. Therefore, specific inhibition of ROCK2 has an important significance for the repair of central nervous system damage and the treatment of AD. This article reviews several effects of Rho/ROCK2 pathway on the development of AD.
2.Leprosy presented as cutaneous erythema.
Fang WANG ; Sonia Kay HWANG ; Hai-yan HUANG ; Juan DU ; Xiao-lan DING ; Soe Lwin MYINT ; Jian-zhong ZHANG
Chinese Medical Journal 2013;126(19):3797-3797
3.Screening strategy for non-alcoholic fatty liver disease
Saisai ZHANG ; Lung-Yi MAK ; Man-Fung YUEN ; Wai-Kay SETO
Clinical and Molecular Hepatology 2023;29(Suppl):S103-S122
Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease, affecting approximately 25% of the general population worldwide, and is forecasted to increase global health burden in the 21st century. With the advancement of non-invasive tests for assessing and monitoring of steatosis and fibrosis, NAFLD screening is now feasible, and is increasingly highlighted in international guidelines related to hepatology, endocrinology, and pediatrics. Identifying high-risk populations (e.g., diabetes mellitus, obesity, metabolic syndrome) based on risk factors and metabolic characteristics for non-invasive screening is crucial and may aid in designing screening strategies to be more precise and effective. Many screening modalities are currently available, from serum-based methods to ultrasonography, transient elastography, and magnetic resonance imaging, although the diagnostic performance, cost, and accessibility of different methods may impact the actual implementation. A two-step assessment with serum-based fibrosis-4 index followed by imaging test vibration-controlled transient elastography can be an option to stratify the risk of liverrelated complications in NAFLD. There is a need for fibrosis surveillance, as well as investigating the cost-effectiveness of different screening algorithms and engaging primary care for first-stage triage screening.
4.Mechanisms of hepatocellular carcinoma and cirrhosis development in concurrent steatotic liver disease and chronic hepatitis B
Saisai ZHANG ; Lung-Yi MAK ; Man-Fung YUEN ; Wai-Kay SETO
Clinical and Molecular Hepatology 2025;31(Suppl):S182-S195
Chronic hepatitis B (CHB) poses a major global public health challenge and is a leading cause of cirrhosis and liver cancer. Hepatic steatosis is common in individuals with CHB compared to the non-CHB population and is particularly prevalent in hepatitis B virus (HBV)-endemic regions, affecting about one-third of CHB patients. The interaction between hepatic steatosis and CHB-related disease progression is complex and still under debate. Evidence demonstrates that co-existing steatosis may worsen liver fibrosis while paradoxically increasing the likelihood of achieving better HBV control. In particular, despite the association of steatotic liver disease (SLD) with lower HBV viral loads and higher rates of HBsAg seroclearance, the coexistence of CHB and SLD can potentially accelerate liver disease progression. Factors such as fat deposition, lipotoxicity, oxidative stress, and chronic inflammation in SLD may foster a pro-fibrotic and pro-carcinogenic environment, accelerating the disease progression. Additionally, loss of global DNA methylation, changes in the immune microenvironment, and genetic susceptibility further contribute to the development of CHB-related cirrhosis and hepatocellular carcinoma (HCC). This review examines the mechanisms driving liver disease progression and the heightened risk of cirrhosis and HCC in patients with concurrent CHB and steatotic liver disease, underscoring the importance of prioritizing antiviral therapy for CHB in addition to addressing SLD.
5.Mechanisms of hepatocellular carcinoma and cirrhosis development in concurrent steatotic liver disease and chronic hepatitis B
Saisai ZHANG ; Lung-Yi MAK ; Man-Fung YUEN ; Wai-Kay SETO
Clinical and Molecular Hepatology 2025;31(Suppl):S182-S195
Chronic hepatitis B (CHB) poses a major global public health challenge and is a leading cause of cirrhosis and liver cancer. Hepatic steatosis is common in individuals with CHB compared to the non-CHB population and is particularly prevalent in hepatitis B virus (HBV)-endemic regions, affecting about one-third of CHB patients. The interaction between hepatic steatosis and CHB-related disease progression is complex and still under debate. Evidence demonstrates that co-existing steatosis may worsen liver fibrosis while paradoxically increasing the likelihood of achieving better HBV control. In particular, despite the association of steatotic liver disease (SLD) with lower HBV viral loads and higher rates of HBsAg seroclearance, the coexistence of CHB and SLD can potentially accelerate liver disease progression. Factors such as fat deposition, lipotoxicity, oxidative stress, and chronic inflammation in SLD may foster a pro-fibrotic and pro-carcinogenic environment, accelerating the disease progression. Additionally, loss of global DNA methylation, changes in the immune microenvironment, and genetic susceptibility further contribute to the development of CHB-related cirrhosis and hepatocellular carcinoma (HCC). This review examines the mechanisms driving liver disease progression and the heightened risk of cirrhosis and HCC in patients with concurrent CHB and steatotic liver disease, underscoring the importance of prioritizing antiviral therapy for CHB in addition to addressing SLD.
6.Mechanisms of hepatocellular carcinoma and cirrhosis development in concurrent steatotic liver disease and chronic hepatitis B
Saisai ZHANG ; Lung-Yi MAK ; Man-Fung YUEN ; Wai-Kay SETO
Clinical and Molecular Hepatology 2025;31(Suppl):S182-S195
Chronic hepatitis B (CHB) poses a major global public health challenge and is a leading cause of cirrhosis and liver cancer. Hepatic steatosis is common in individuals with CHB compared to the non-CHB population and is particularly prevalent in hepatitis B virus (HBV)-endemic regions, affecting about one-third of CHB patients. The interaction between hepatic steatosis and CHB-related disease progression is complex and still under debate. Evidence demonstrates that co-existing steatosis may worsen liver fibrosis while paradoxically increasing the likelihood of achieving better HBV control. In particular, despite the association of steatotic liver disease (SLD) with lower HBV viral loads and higher rates of HBsAg seroclearance, the coexistence of CHB and SLD can potentially accelerate liver disease progression. Factors such as fat deposition, lipotoxicity, oxidative stress, and chronic inflammation in SLD may foster a pro-fibrotic and pro-carcinogenic environment, accelerating the disease progression. Additionally, loss of global DNA methylation, changes in the immune microenvironment, and genetic susceptibility further contribute to the development of CHB-related cirrhosis and hepatocellular carcinoma (HCC). This review examines the mechanisms driving liver disease progression and the heightened risk of cirrhosis and HCC in patients with concurrent CHB and steatotic liver disease, underscoring the importance of prioritizing antiviral therapy for CHB in addition to addressing SLD.
7.Comparison of complete chloroplast genome sequences of Amygdalus pedunculata Pall.
Chunyan DUAN ; Kay ZHANG ; Yizhong DUAN
Chinese Journal of Biotechnology 2020;36(12):2850-2859
Amygdalus pedunculata Pall. is one of the 12 important woody oil crops in China. In this study, we determined the complete chloroplast genome sequence of A. pedunculata Pall. (MG602257) from Mu Us desert in Yulin city, Shaanxi province, China. The plastome was 157 851 bp with 36.8% GC content. Comparisons among the plastomes of MG602257 and other two MG869261 and KY101153 from Genebank of NCBI showed that the total length of these chloroplast genomes was MG602257< MG869261
8.COVID-19 vaccine immunogenicity among chronic liver disease patients and liver transplant recipients: A meta-analysis
Ka Shing CHEUNG ; Chiu Hang MOK ; Xianhua MAO ; Ruiqi ZHANG ; Ivan FN HUNG ; Wai Kay SETO ; Man Fung YUEN
Clinical and Molecular Hepatology 2022;28(4):890-911
Background/Aims:
Data of coronavirus disease 2019 (COVID-19) vaccine immunogenicity among chronic liver disease (CLD) and liver transplant (LT) patients are conflicting. We performed meta-analysis to examine vaccine immunogenicity regarding etiology, cirrhosis status, vaccine platform and type of antibody.
Methods:
We collected data via three databases from inception to February 16, 2022, and reported pooled seroconversion rate, T cell response and safety data after two vaccine doses.
Results:
Twenty-eight (CLD only: 5; LT only: 18; both: 2; LT with third dose: 3) observational studies of 3,945 patients were included. For CLD patients, seroconversion rate ranged between 84% (95% confidence interval [CI], 76–90%) and 91% (95% CI, 83–95%), based predominantly on neutralizing antibody and anti-spike antibody, respectively. Seroconversion rate was 81% (95% CI, 76–86%) in chronic hepatitis B, 96% (95% CI, 93–97%) in non-alcoholic fatty liver disease, 85% (95% CI, 75–91%) in cirrhosis and 85% (95% CI, 78–90%) in non-cirrhosis, 86% (95% CI, 78–92%) for inactivated vaccine and 89% (95% CI, 71–96%) for mRNA vaccine. The pooled seroconversion rate of anti-spike antibody was 66% (95% CI, 55–75%) after two doses of mRNA vaccines and 88% (95% CI, 58–98%) after third dose among LT recipients. T cell response rate was 65% (95% CI, 30–89%). Prevalence of adverse events was 27% (95% CI, 18–38%) and 63% (95% CI, 39–82%) among CLD and LT groups, respectively.
Conclusions
CLD patients had good humoral response to COVID-19 vaccine, while LT recipients had lower response.
9.Effect of moderate-to-severe hepatic steatosis on neutralising antibody response among BNT162b2 and CoronaVac recipients
Ka Shing CHEUNG ; Lok Ka LAM ; Rex Wan Hin HUI ; Xianhua MAO ; Ruiqi R ZHANG ; Kwok Hung CHAN ; Ivan FN HUNG ; Wai Kay SETO ; Man-Fung YUEN
Clinical and Molecular Hepatology 2022;28(3):553-564
Background/Aims:
Studies of hepatic steatosis (HS) effect on COVID-19 vaccine immunogenicity are lacking. We aimed to compare immunogenicity of BNT162b2 and CoronaVac among moderate/severe HS and control subjects.
Methods:
Two hundred ninety-five subjects who received BNT162b2 or CoronaVac vaccines from five vaccination centers were categorized into moderate/severe HS (controlled attenuation parameter ≥268 dB/m on transient elastography) (n=74) or control (n=221) groups. Primary outcomes were seroconversion rates of neutralising antibody by live virus Microneutralization (vMN) assay (titer ≥10) at day21 (BNT162b2) or day28 (CoronaVac) and day56 (both). Secondary outcome was highest-tier titer response (top 25% of vMN titer; cutoff: 160 [BNT162b2] and 20 [CoronaVac]) at day 56.
Results:
For BNT162b2 (n=228, 77.3%), there was no statistical differences in seroconversion rates (day21: 71.7% vs. 76.6%; day56: 100% vs. 100%) or vMN geometric mean titer (GMT) (day21: 13.2 vs. 13.3; day56: 91.9 vs. 101.4) among moderate/severe HS and control groups respectively. However, lower proportion of moderate/severe HS patients had highest-tier response (day56: 5.0% vs. 15.5%; P=0.037). For CoronaVac (n=67, 22.7%), there was no statistical differences in seroconversion rates (day21: 7.1% vs. 15.1%; day56: 64.3% vs. 83.0%) or vMN GMT (5.3 vs. 5.8,) at day28. However, moderate/severe HS patients had lower vMN GMT (9.1 vs. 14.8, P=0.021) at day 56 with lower proportion having highest-tier response (21.4% vs. 52.8%, P=0.036).
Conclusions
While there was no difference in seroconversion rate between moderate/severe HS and control groups after two doses of vaccine, a lower proportion of moderate/severe HS patients achieved highest-tier response for either BNT162b2 or CoronaVac.
10.Study on the application and evaluation of methods for gene and antigen detection in plague surveillance program.
Rong HAI ; Dong-zheng YU ; Xian-ming SHI ; Zhong-bing ZHANG ; Yong-jiao TANG ; Peng WANG ; Lian-xu XIA ; Shao-zhen WEI ; Bing XU ; Ying-xu QIN ; Zhi-kai ZHANG ; Guo-xiang SHI ; Xu DONG-LEI ; Hong CAI ; En-min ZHANG ; Jian-chun WEI ; Ying-zhi GENG ; De-hui HUANG ; Bin ZHAO ; Li-mao WANG ; Feng-qin MA ; Fu HUANG ; Yue WANG ; Tao ZHANG ; Jian-hua ZHANG
Chinese Journal of Epidemiology 2007;28(5):426-429
OBJECTIVETo apply and evaluate new methods regarding specific gene and antigen detection in plague surveillance program.
METHODS1798 samples from natural foci of plague were tested, using internal quality control multiple-polymerase chain reaction, F1 antigen marked by immuno chromatographic assay and enzyme linked immunosorbent assay. Culture of Yersinia pestis and reverse indirect hemagglutination assay were used as reference diagnostic methods.
RESULTSThe overall positive rate of culture on Yersinia pestis together with gene and antigen detection was 7.34%, showing an 16.81% increase when comparing to 6.28% using Yersinia pestis culture method alone. The rate of coincidence was 97.13%.
CONCLUSIONThe new standard being used for specific gene and antigen detection could increase the positive rate of diagnosis on plague.
Animals ; Bacterial Proteins ; genetics ; immunology ; Enzyme-Linked Immunosorbent Assay ; Mice ; Plague ; microbiology ; Polymerase Chain Reaction ; Yersinia pestis ; genetics ; immunology ; pathogenicity