This study aims to obtain highly sensitive and specific monoclonal antibodies to ribavirin.Ribavirin was coupled with carrier proteins to synthesize artificial complete antigen by glutaralde-hyde method.UV scanning,gel electrophoresis and animal immunization were employed to identify quality of the synthesized artificial complete antigens.The monoclonal antibody was prepared by cell fusion,positive hybridoma screening and induction of ascites in vivo,and the immunological characteristics of monoclonal antibodies were identified.The results showed that RBV was coupled to carrier proteins,and the artificial antigens were prepared successfully.One cell line that can stably secrete monoclonal antibodies against ribavirin was obtained,and the titers of the mono-clonal antibodies secreted by cell line was above 1∶512 000,with IC50 values of 4.74 μg/L.Fur-thermore,there were no cross-reactivity with other antiviral drugs such as amantadine and carrier proteins.In this study,monoclonal antibodies of ribavirin with high sensitivity and specificity was synthesized successfully,which lays a solid foundation for the establishment of immunoassay methods of ribavirin.

3D printing, an emerging technology, can assist improving surgical efficiency of liver surgery. 3D-printed organ models facilitate surgeons in surgical planning, enabling the simulation of surgical procedures and guiding interventions through surgical navigation. Furthermore, 3D printing harnesses the potential of utilizing tissue or cells from specific individuals to generate grafts for liver surgeries, thereby addressing the issue of graft shortage and advancing the development of personalized medicine.

MEK is a canonical effector of mutant KRAS; however, MEK inhibitors fail to yield satisfactory clinical outcomes in KRAS-mutant cancers. Here, we identified mitochondrial oxidative phosphorylation (OXPHOS) induction as a profound metabolic alteration to confer KRAS-mutant non-small cell lung cancer (NSCLC) resistance to the clinical MEK inhibitor trametinib. Metabolic flux analysis demonstrated that pyruvate metabolism and fatty acid oxidation were markedly enhanced and coordinately powered the OXPHOS system in resistant cells after trametinib treatment, satisfying their energy demand and protecting them from apoptosis. As molecular events in this process, the pyruvate dehydrogenase complex (PDHc) and carnitine palmitoyl transferase IA (CPTIA), two rate-limiting enzymes that control the metabolic flux of pyruvate and palmitic acid to mitochondrial respiration were activated through phosphorylation and transcriptional regulation. Importantly, the co-administration of trametinib and IACS-010759, a clinical mitochondrial complex I inhibitor that blocks OXPHOS, significantly impeded tumor growth and prolonged mouse survival. Overall, our findings reveal that MEK inhibitor therapy creates a metabolic vulnerability in the mitochondria and further develop an effective combinatorial strategy to circumvent MEK inhibitors resistance in KRAS-driven NSCLC.

OBJECTIVES: To examine the reliability and accuracy of Walker's model for estimating the sex of Han adults in western China by using cranium three-dimensional (3D) CT reconstruction, and to study the suitable cranial sex estimation model for Han people in western China. METHODS: A total of 576 cranial CT 3D reconstructed images from Hanzhong Hospital in Shaanxi Province from 2017 to 2021 were collected. These images were divided into the experimental group with 486 samples and the validation group with 90 samples. Walker's model was used by observer 1 to estimate the sex of experimental group samples. The logistic function applicable to Han people in western China was corrected by observer 1. The 90 samples in the validation group were scored and substituted into the modified logistic function to complete the back substitution test by observer 1, 2 and 3. RESULTS: The accuracy of sex estimation of Han adults in western China was 63.2%-77.2% by applying Walker's model. The accuracy of modified logistic function was 82.9%. The accuracy of sex estimation through back substitution test by 3 observers was 75.6%-91.1%, with a Kappa value of 0.689 (P<0.05) for inter-observer consistency and 0.874 (P<0.05) for intra-observer consistency. CONCLUSIONS There are great differences in bone characteristics among people from different regions. The modified logistic function can achieve higher accuracy in Han adults in western China.
Humans ; Adult ; Reproducibility of Results ; Sex Determination by Skeleton/methods* ; Forensic Anthropology ; Skull/anatomy & histology* ; Imaging, Three-Dimensional ; China ; Tomography, X-Ray Computed

Gastric cancer is one of the common tumors in the world and a major cause of cancer death.Although the 5-year survival rate of gastric cancer patients has increased greatly with the improvement levels of diagnosis and treatment,the high malnutri-tion rate of gastric cancer patients still has a significant impact on their overall survival and quality of life.Malnutrition is considered an independent prognostic factor for cancer patients,early detection of malnutrition in gastric cancer patients and more reasonable peri-operative nutritional support play an important role in the survival and prognosis of gastric cancer patients.This article combines exist-ing research at domestic and abroad to review the nutritional risk screening and assessment of gastric cancer patients during periopera-tive period,as well as the research progress of perioperative nutritional support and immunonutrition,in order to provide more compre-hensive nutritional management strategies for patients with gastric cancer during the perioperative period.

Objective: To investigate the expression of CD155/TIGIT in patients with osteosarcoma and its significance Methods : The expression differences of CD155 and TIGIT in tumor tissues of distant metastatic osteosarcoma patients and non⁃metastatic osteosarcoma patients were analyzed by cancer Genome Atlas ( TCGA) database.The surgically removed tissues of osteosarcoma patients were collected to prepare pathological sections and tissue chips , and the tumor tissue and cell morphology were observed by HE staining. Immunohistochemical staining was used to detect the expression of CD155 and TIGIT , and the scores were divided into high expression group and low expression group according to the scores. Chi⁃square test was used to analyze the relationship between CD155/TIG⁃IT expression and clinical features and prognosis. Results : TCGA database data showed higher expression of CD155 and TIGIT in patients with osteosarcoma accompanied by metastasis. HE staining of pathological sections revealed that tumor tissues with high expression of CD155/TIGIT contained more binuclear or multinucleated , hyperchromatic and obviously heteromorphic tumor cells. Immunohistochemical staining and score analysis of tissue chip showed that the expression of CD155 and TIGIT was correlated with clinical stage and distant metastasis ( P < 0. 05) , but not with age , sex , tumor size , pathological type and tumor necrosis rate. Conclusion CD155 and TIGIT may be one of the prognostic indicators of osteosarcoma.

Objective:To understand the current living and health status of leprosy survivors in Fengxian District， Shanghai， and to provide scientific evidence for improving their quality of life. Methods:In January 2018-June 2020， professionally trained CDC staff performed a household investigation on 41 patients with leprosy （case group） and 82 non-leprosy persons （control group） every year. Living and health status， and routine laboratory examinations such as blood pressure， blood glucose， and blood lipids were monitored. Results:Majority of the patients with leprosy had low educational level （68.29% being primary school） and were mostly farmers （51.22%）.The patients had abnormal residual Ⅱ level 5 （12.20%） and mostly were tb-like （TT） （53.66%）. Moreover， some patients were not incapacitated （46.34%）， had no family financial difficulties （29.27%）， did not acquire the national subsistence allowance policy （58.54%）， and asked for "regular physical examination" （68.29%）.Compared to the 82 control persons， the patients with leprosy had significantly different body mass index （BMI） and blood pressure （P<0.05）. Conclusion:Living and health status of leprosy survivors in Fengxian District remains to be further improved. The China Disabled Persons’ Federation （CDF）， Red Cross， civil affairs， and health administration need to further strengthen the cooperation.