Objective To explore the relationship between carbohydrate sulfotransferase 6(CHST6)expression level and prognosis in glioma patients and construct prognosis model by using bioinformatics method.Methods To analyze the difference of CHST6 expression in glioma.The median CHST6 expression was divided into high and low expression groups.The prognostic differences between the groups were analyzed.The expression level of CHST6 and different clinical features were analyzed by Cox regression,and the prediction and improvement model was established,and the validity improvement was compared with the control model.Results A total of 1204 medical records were included in TCGA and CGGA databases.CHST6 was significantly up-regulated in glioma samples(TCGA vs.GTEx,Z= 2.457,P＜0.001;CGGA vs.GTEx,Z=4.800,P＜0.001),and was an independent prognostic factor for glioma together with age,WHO grade,IDH mutation status,and 1p19q co-deletion(Cox analysis β=0.02,SE=0.01,HR=1.02,95%CI:1.01～1.04,P=0.01;C-Index 0.885,95%CI:0.862～0.908),has higher predictive validity than the control model(Improved model vs.Control model:TCGA d=0.036±0.004,SE=0.002,P=0.007;CGGA d=0.087±0.004,SE=0.002,P=0.001).Conclusion The high expression of CHST6 may be a predictor of poor prognosis and abnormal immune function in glioma patients.

Existing studies have shown that Astragalus membranaceus(AM)and its active ingredients astragalus polysaccharides,oninon,and astragalus methyl glycosides can attenuate X-ray radiation-induced injury.However,there are no studies on how isoliquiritigenin(ISL)attenuate the bystander effect of bone marrow mesenchymal stem cells(BMSCs)induced by carbon ion radiation therapy for lung cancer.This study aimed to investigate the AM-derived small molecule ISL to enhance radiotherapy sensitivity by attenuating the carbon ion radiation-induced bystander effect(RIBE)in BMSCs to elucidate its mecha-nism of action.In this study,we established a C57BL/6 mouse lung cancer transplantation tumor model in vivo and a co-culture model of A549 cells and BMSCs in vitro,and the models were successfully treated with carbon ions.In further work,we used flow cytometry,immunofluorescence,Western blot,enzyme-linked immunosorbent assay(ELISA),inhibitor,short hairpin RNA(shRNA),Cell Counting Kit-8(CCK-8),and other methods to illustrate the mechanism.In the next experiments,we found that ISL combined with carbon ion radiotherapy had a significant anti-tumor effect and protected BMSCs from radiation damage.The aim of this study was to investigate the potential of ISL in enhancing the sensitivity of lung cancer cells to radiotherapy and attenuating RIBE in both in vitro and in vivo settings.Traditional Chinese medicine combined with radiation therapy is a promising and innovative treatment for non-small cell lung cancer.These results establish a theoretical foundation for further clinical development of ISL as a potential radiosensitizer option.