1.Visualization and hotspots analysis of research on adenocarcinoma of esophagogastric junc-tion based on Web of Science
Lin LIU ; Zhongyi WANG ; Chuyin HUANG ; Yanfeng HU ; Jiang YU ; Guoxin LI ; Hao CHEN
Chinese Journal of Digestive Surgery 2023;22(10):1243-1254
In recent years, the incidence of adenocarcinoma of esophagogastric junction (AEG) has increased gradually. Due to the unique anatomical location and the different biological features from esophageal cancer and gastric cancer, AEG cannot be simply equated with esophageal cancer or gastric cancer, and the definition, classification and treatment methods of AEG are still controversial. As a result, the study of AEG is becoming increasingly important. Using bibliometrics, the authors search English literatures from the Web of Science Core Collection database from the establishment to December 31, 2022, with the keyword adenocarcinoma of esophagogastric junc-tion. To systematically review the international literatures on AEG, EndNote and Excel are used to manage literatures and perform statistical analysis, and VOSviewer and CiteSpace are used to analyze the social network, time series of countries, institutions, authors and keywords, the co-citation of authors and the citation bursts of keywords. The authors summarize the research status and hot trends in this field, hoping to provide reference for future research.
2.Effects and Mechanism of Oncolytic Virus M 1 Inducing the Apoptosis of Cervical Cancer C- 33A Cells
Xiao XIAO ; Yasi ZHOU ; Chuyin PENG ; Jinqing DENG ; Laiyou WANG ; Wenbo ZHU
China Pharmacy 2021;32(23):2827-2831
OBJECTIVE:To study the effects and mechanism of oncolytic virus M 1(called M 1 virus for short )inducing the apoptosis of cervical cancer C-33A cells. METHODS :MTT assay was used to detect survival rate of C- 33A cells that were treated with different titers (0,0.001,0.01,0.1,1,10 PFU/cell)of M 1 virus. C- 33A cells were divided into control group (0 PFU/cell), low-dose,medium-dose and high-dose groups of M 1 virus(0.001,0.01,0.1 PFU/cell). After treated with corresponding titers of M1 virus for 48 h,flow cytometry was used to detect the apoptotic rate and infection rate of cells;Western blot was performed to detect the protein expression of C/EBP homologous proteins (CHOP),caspase-12,caspase-3 and cleaved-caspase- 3. RESULTS : After treated with different titers of M 1 virus,the survival rate of C- 33A cells decreased significantly (P<0.01),and showed a dose-dependent tr end. Compared with control group ,the apoptotic rate and infection rate of cells in M 1 virus groups as well as the protein expression of CHOP ,caspase-12 and cleaved-caspase- 3(except for medium-dose group )in M 1 virus medium-dose and high-dose groups were increased significantly (P<0.01). CONCLUSIONS :M1 virus can induce the apoptosis of cervical cancer C-33A cells ,and its mechanism may be related to the activation of endoplasmic reticulum stress pathway.
3.Effect of Aloe-emodin on Aβ42 Aggregation and Cytotoxicity in Presence of Al3+
Ni YAO ; Chuyin WANG ; Xitong ZHAO ; Yang CHEN ; Qian ZHANG ; Fang FANG ; Jun GUAN
Chinese Journal of Experimental Traditional Medical Formulae 2022;28(18):99-107
ObjectiveTo study the inhibitory effect of aloe-emodin (AE) on aluminum ion (Al3+)-induced β-amyloid protein 42 (Aβ42) aggregation and its depolymerization on formed Aβ42-Al3+ aggregates in vitro, and to investigate the effect of AE on the cytotoxicity of Aβ42 aggregation in the presence of Al3+. MethodThe Aβ42 group, Aβ42+Al3+ group, Aβ42+AE group, Aβ42+Al3++AE group and the depolymerization test group were set up in the experiment. The aggregation fibrosis process, aggregation morphology, aggregation size and cytotoxicity of Aβ42 in each group were detected by thioflavin T (ThT) fluorescence assay, transmission electron microscopy (TEM), dynamic light scattering (DLS) experiment and thiazolyl blue (MTT) cytotoxicity assay. ResultCompared with the Aβ42 group, Al3+ could promote Aβ42 aggregation, increase the fluorescence intensity of ThT by 124.48%, induce the aggregation of Aβ42 to form fiber bundles with larger particle size, and significantly reduce the cell viability of human neuroblastoma SH-SY5Y cells (P<0.01), thus reducing the cell survival rate to 51.05%. AE not only inhibited Aβ42 aggregation, but also inhibited Al3+-induced Aβ42 aggregation in a concentration-dependent manner. Compared with the Aβ42+Al3+ group, high concentration of AE could reduce the ThT fluorescence intensity to 41.66%, and change the polypeptide aggregation pathway to form amorphous aggregates with small particle size. Besides, it significantly inhibited the cytotoxicity of Aβ42 induced by Al3+ (P<0.01), and restored the cell survival rate to 84.87%. Further depolymerization was conducted, AE could depolymerize Aβ42-Al3+ aggregates to make the formed aggregates disappear and form some small-particle short fibers and amorphous structure aggregates with low toxicity. ConclusionAE can inhibit Aβ42 aggregation and cytotoxicity in the presence of Al3+, depolymerize the formed Aβ42-Al3+ aggregates and alleviate the cytotoxicity, thus laying the foundation for exploring the mechanism of AE in the treatment of Alzheimer's disease.