Influence of SLC16A Family on Clinical Features and Biological Behaviours of Lung Adenocarcinoma and Squamous Cell Carcinoma / 肿瘤防治研究

Objective To explore the relation between SLC16A family and clinical characteristics, biological behavior of lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC). Methods The expression of 14 members of the SLC16A family in LUAD tissues, LUSC tissues and normal tissues in TCGA database was analyzed by Wilcoxon signed rank sum test. Cox regression was used to evaluate the relation between the family and overall survival, progression-free survival of LUAD and LUSC patients. Logistic regression was used to evaluate the relation between the family and TNM, clinical stage of LUAD and LUSC patients. Principal component analysis was used to establish a Score-SLC16As that comprehensively reflected the family in LUAD and LUSC. ROC, Log rank analysis and univariate and multivariate Cox regression analyses were applied to evaluate the diagnostic effect and survival prediction function of Score-SLC16As on LUAD and LUSC respectively. GSEA was used to evaluate the biological significance of Score-SLC16As and CIBERSORT/Immune checkpoint clusters were used to assess the immune status of Score-SLC16As in LUAD and LUSC. Results In LUAD and LUSC, most members of SLC16A family were differentially expressed and significantly correlated with survival prognosis. Score-SLC16As can clearly diagnose LUAD and LUSC, significantly predict survival prognosis, and can be used as an independent risk factor. Score-SLC16As is a risk factor for LUAD but a protective factor for LUSC. Score-SLC16As is closely related to tumor proliferation pathways and immune escape. Conclusion The SLC16A family is closely related to the clinical features and malignant biological behaviors of LUAD and LUSC.

Cordycepin protects against β-amyloid and ibotenic acid-induced hippocampal CA1 pyramidal neuronal hyperactivity

Cordycepin exerts neuroprotective effects against excitotoxic neuronal death. However, its direct electrophysiological evidence in Alzheimer's disease (AD) remains unclear. This study aimed to explore the electrophysiological mechanisms underlying the protective effect of cordycepin against the excitotoxic neuronal insult in AD using whole-cell patch clamp techniques. β-Amyloid (Aβ) and ibotenic acid (IBO)-induced injury model in cultured hippocampal neurons was used for the purpose. The results revealed that cordycepin significantly delayed Aβ + IBO-induced excessive neuronal membrane depolarization. It increased the onset time/latency, extended the duration, and reduced the slope in both slow and rapid depolarization. Additionally, cordycepin reversed the neuronal hyperactivity in Aβ + IBO-induced evoked action potential (AP) firing, including increase in repetitive firing frequency, shortening of evoked AP latency, decrease in the amplitude of fast afterhyperpolarization, and increase in membrane depolarization. Further, the suppressive effect of cordycepin against Aβ + IBO-induced excessive neuronal membrane depolarization and neuronal hyperactivity was blocked by DPCPX (8-cyclopentyl-1,3-dipropylxanthine, an adenosine A₁ receptor-specific blocker). Collectively, these results revealed the suppressive effect of cordycepin against the Aβ + IBO-induced excitotoxic neuronal insult by attenuating excessive neuronal activity and membrane depolarization, and the mechanism through the activation of A₁R is strongly recommended, thus highlighting the therapeutic potential of cordycepin in AD.

EGFR Mutation Status among NSCLCs in Southern Shaanxi / 现代生物医学进展

Objective:To analyze the EGFR gene polymorphism in the non-small cell lung (NSCLCs) cancer in southern of Shaanxi Province.Methods:The next generation sequencing technology was used to detect the mutation of exon 18,19,20 and 21 of EGFR gene.We analyzed EGFR gene mutation rate in NSCLCs patients.233 patients was involved in our study.Results:82 cases with EGFR gene mutations was found,the mutation rate of exon18,19,20 and 21 was 1.3％,16.3％,0％ and 18％ respectively.The mutation rate of EGFR in male patients was lower (31.2％,39/125) than that of female cases (39.8％,43/108),the mutation rate of squamous cell carcinoma (22％,9/41) was lower than that of adenocarcinoma (39.1％,75/192).Conclusions:NSCLCs patients from southern Shaanxi Province had high mutation rate ofEGFR gene,and exon 19 and exon 21 mutations were in the majority.EGFR gene mutation rate was not related to gender and pathological types.