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Background Middle-aged and elderly ischemic stroke patients suffer from multiple co-morbid chronic diseases, and this co-morbidity status has a great impact on the patients' healthy living standard. Currently, there are few studies on the current status of ischemic stroke co-morbidities and the analysis of co-morbidity patterns. Objective To understand the current status of ischemic stroke co-morbidities in middle-aged and elderly people in Henan Province, and explore the association between ischemic stroke co-morbidities, so as to provide a reference basis for the management of ischemic stroke co-morbidities, as well as the preventive and control measures. Methods Ischemic stroke patients over 45 years of age attending Henan Provincial People's Hospital from January 2021 to December 2022 were selected for the study, with their chronic disease prevalence counted, the status of ischemic stroke co-morbidities was compared by different demographic characteristics, and the co-morbidity patterns of ischemic stroke in the middle-aged and elderly population were investigated using cluster analysis. Results A total of 1 685 middle-aged and elderly ischemic stroke patients were enrolled in this study, of whom 90.0% (1 516/1 685) had at least 1 co-morbid chronic disease; 13.6% (230/1 685) had 2 co-morbid chronic diseases, 26.9% (454/1 685) had 3 co-morbid chronic diseases, and 49.4% (832/1 685) had 4 or more co-morbid chronic diseases. The chronic diseases with high prevalence were hypertension in 1 047 cases (62.1%) and dyslipidemia in 755 cases (44.8%). Among ischemic stroke patients, the prevalence of co-morbidities was higher in females compared with males (χ2=14.516, P

Background With the aging and longer survival of the population, comorbid chronic diseases is increasingly common. The variety and complexity of diseases pose challenges to the health management of the elderly. There is a relative lack of multimorbidity pattern researches in China, which are necessary issues for research. Objective To investigate the patterns of coexistence of common multiple chronic conditions among the elderly in China, in order to help policymakers, researchers, and clinicians better understand the current status of multimorbidity among Chinese elderly. Methods Data on the demographic characteristics and health status of 14 chronic diseases were extracted from the respondents aged 60 years and above in the China Health and Retirement Longitudinal Study (CHARLS) 2018, association rules, cluster analysis, principal component analysis, latent class analysis were used to explore the multimorbidity patterns of Chinese elderly, and the results of different methods were compared. Results The data from a total of 10 800 respondents were eventually included, there were differences among the patterns obtained by four methods. However, the consistent multimorbidity patterns were identified: hypertension, diabetes or elevated blood glucose, dyslipidemia; chronic lung disease and asthma; arthritis or rheumatism, stomach diseases or digestive diseases; stroke, memory-related diseases. Conclusion The consistent patterns obtained by different methods contain chronic diseases with significant relationships of etiologies. The reasons of differences in results are complex etiologic relationships and different method principles.

CD70 is overexpressed in a variety of solid and hematological tumors and plays a role in tumor proliferation and evasion of immune surveillance. Targeting and blocking its binding to the receptor CD27 have the potential to treat CD70-dependent tumors. To generate novel CD70 blocking agents, we screen a human CD70-immunized camel VHH phage display library and isolate two blocking nanobodies against human CD70 targeting different epitopes. Upon enrichment by three rounds of biopanning, two strategies are employed to identify CD70 blockers. One named affinity selection is used for detecting clones with CD70 binding by conventional PE-ELISA. However, no clone with a blocking effect is obtained from 188 enriched clones by this method. The alternative strategy named competitive selection is based on the inhibiting capacity of CD70-CD27 binding by enriched VHHs. By this method, two clones, Nb-2B3 and Nb-3B6, with strong blocking capacity are obtained from 20 enriched VHHs, suggesting the efficiency of this strategy. Furthermore, Nb-2B3 and Nb-3B6 specifically bind to CD70-positive SKOV3 and Raji cells at low concentrations. Meanwhile, Nb-2B3 has no competitive effect on the binding of Nb-3B6 to CD70, and vice versa, indicating that they target two different epitopes on CD70. Our data show that nanobodies Nb-2B3 and Nb-3B6 are potential attractive theranostic agents for CD70-expressing cancers.