Cerebral ischemia-reperfusion injury induces a secondary immune inflammatory reaction that exacerbates brain injury and clinical prognosis. Dendritic cells (DCs) and microglia are both important regulators of neuroinflammation. Studies have confirmed that a large number of cells express the DC surface marker CD11c in the ischemic area, and some of these cells also express microglial markers. However, the specific mechanism of transformation between microglia and DCs and their roles in the process of cerebral ischemia-reperfusion injury are still not clear. In this study, we established a mouse model and flow cytometry was used to detect the expression of mature DC surface molecules in activated microglia. IFN-γ knockout mice were used to determine the regulatory effect of IFN-γ on microglial transformation. We found that CD11c⁺ cells were derived from microglia after ischemia-reperfusion injury, and this group of cells highly expressed MHC-II molecules and other costimulatory molecules, such as CD80 and CD86, which were regulated by IFN-γ and its downstream signaling molecules ERK/c-myc. In summary, our results showed in cerebral ischemia-reperfusion injury, IFN-γ regulates the transformation of microglia to DC-like cells. Microglial-derived DC-like cells possess the ability to present antigens and activate naïve T cells which is regulated by the ERK/c-myc signaling pathway.

Background: Stem cells play an important role in acute myeloid leukemia (AML). However, their precise effect on AML tumorigenesis and progression remains unclear.Methods: The present study aimed to characterize stem cell-related gene expression and identify stemness biomarker genes in AML. We calculated the stemness index (mRNAsi) based on transcription data using the one-class logistic regression (OCLR) algorithm for patients in the training set. According to the mRNAsi score, we performed consensus clustering and identified two stemness subgroups. Eight stemness-related genes were identified as stemness biomarkers through gene selection by three machine learning methods.Results: We found that patients in stemness subgroup I had a poor prognosis and benefited from nilotinib, MK-2206 and axitinib treatment. In addition, the mutation profiles of these two stemness subgroups were different, which suggested that patients in different subgroups had different biological processes. There was a strong significant negative correlation between mRNAsi and the immune score (r= -0.43, p<0.001). Furthermore, we identified eight stemness-related genes that have potential to be biomarkers, including SLC43A2, CYBB, CFP, GRN, CST3, TIMP1, CFD and IGLL1. These genes, except IGLL1, had a negative correlation with mRNAsi. SLC43A2 is expected to be a potential stemness-related biomarker in AML.Conclusion: Overall, we established a novel stemness classification using the mRNAsi score and eight stemness-related genes that may be biomarkers. Clinical decision-making should be guided by this new signature in prospective studies.

Prediabetes and diabetes are common and serious public health problems, and high blood glucose can lead to serious cardiovascular complications. The purpose of this article was to explore the link between CVH levels and the incidence of prediabetes and diabetes in people over 20 years old, and whether serum vitamin D status could alter this relationship. Data, from six consecutive cycles of the NHANES database from 2007 to 2018 were combined, eligible participants were aged ≥20 years. After excluding missing data, a total of 19,992 subjects were enrolled in the study. Significant risk factors for prediabetes and diabetes were analyzed using univariate and multivariate logistic regression. Exploring the interaction of VD and CVH on prediabetes and diabetes based on multifactorial regression analysis. The prevalence of prediabetes among all participants was 36.15% and the prevalence of diabetes was 16.39%. CVH and vitamin D levels are influential factors in prediabetes and diabetes, and are negatively associated with the risk of developing prediabetes and diabetes. Compared with normoglycemia, poorer CVH and vitamin D deficiency only had a synergistic multiplicative interaction on the development of diabetes, and no significant interaction was observed for the development of prediabetes. Compared with prediabetes, poorer CVH and vitamin D deficiency still had a synergistic additive interaction on the development of diabetes. Although the cross-sectional study only determine the association and do not prove causality, the current results can be used to prompt people to improve their lifestyle and risk factors to prevent prediabetes or diabetes through higher CVH and adequate Vitamin D.

Background: Acute aortic dissection (AAD) is a cardiovascular catastrophe with substantial early mortality. Although ambient cold has been implicated as a trigger, existing evidence derives predominantly from temperate and subtropical settings. Populations enduring protracted severe winters–a hallmark of cold temperate zones–remain underrepresented, leaving the cardiovascular hazard of sustained extreme cold poorly defined. Methods: In this retrospective time-stratified case-crossover study, we analyzed 1 384 patients with AAD admitted to a tertiary cardiovascular center in Harbin, China–a city in the cold temperate zone of Northeast Asia with a harsh continental monsoon climate. Meteorological data (2014–2023) were interrogated using distributed lag non-linear models combined with conditional logistic regression to quantify exposure lag-response relationships between daily mean temperature and temperature change between neighboring days (TCN) with the AAD onset. Results: A near-linear increase in AAD risk was observed with decreasing daily mean temperature, with minimum morbidity at 25.9 °C. Extreme cold (−23.4 °C, 1st percentile) raised the risk significantly within 3 days. A pronounced risk elevation followed temperature drops between consecutive days–a decline of 9.2 °C was associated with a RR of 9.57 (95% CI 1.21–75.76). In contrast, temperature rises conferred protection. These effects were accentuated in winter and during the period of centralized indoor heating. Conclusion: In a cold temperate region marked by severe winters, both low ambient temperature and abrupt cooling act as potent environmental triggers for AAD. These findings call for enhanced clinical awareness and tailored preventive measures during cold exposure in such climates.