Mechanism of M2 macrophage-derived exosomes in promoting the migration of glioblastoma via transferring miR-1260b / 中国药科大学学报

@#Tumor-associated macrophage promotes the progression of glioblastoma (GBM) by infiltrating into tumor tissue, yet its mechanism has not been fully elucidated.This paper aimed to investigate the mechanism of M2 macrophages in affecting the migratory capacity of GBM via secreting exosomes.Ultracentrifugation was used to extract exosomes; RNA sequencing was carried out to screen differentially expressed miRNAs; target prediction database was used to predict the possible target proteins of miRNA; Dual-luciferase reporter assay was performed to verify the interaction between miRNA and target genes; and the proliferation ability of tumor cells was detected by subcutaneous xenograft model in nude mice.Results showed that tumor-related macrophages were mainly M2 macrophages, and that exosomes secreted by M2 macrophages could promote the migration of glioma cells.Meanwhile, exosomes secreted by M2 macrophages transported miR-1260b and affected the migration of glioma cells through directly targeted AJAP1, suggesting that exosomes secreted by macrophages could affect the migration ability of GBM through transporting miR-1260b.

Advances of Connexin 43-mediated glioma temozolomide resistance / 中国药科大学学报

@#Gap junction is a necessary channel structure composed of connexin proteins, which can form direct communication to exchange material and information between mammal cells. Connexin 43(Cx43)is the most abundant connexin protein expressed in the central nervous system. There is emerging evidence that Cx43 has a wide regulatory effect on the occurrence and development of glioma and play an important role in malignant biological behaviors of glioma. Temozolomide is a currently first-line chemotherapeutic drug for glioma. However, with the prolong of treatment period, the therapy effect of temozolomide is attenuated in some patients because of drug resistance. And the abnormal expression of Cx43 in glioma may be one of the important reasons for temozolomide resistance. In this review, we summarized the structure and function of Cx43, several mechanism of temozolomide resistance and the research progress of Cx43-mediated temozolomide resistance, as well as anti-tumor compounds targeting Cx43 in recent years, in order to provide new evidence for glioma therapy.

QRS duration in evaluating ventricular dyssynchrony in patients with chronic systolic heart failure / 第二军医大学学报

135 ms in selecting patients for cardiac resynchronization therapy(CRT).Methods Forty-five patients with SHF were randomly divided into two groups according to QRS width: Group 1(QRS width 135 ms could finely predict the presence of interventricular dyssynchrony,with a sensitivity of 80% and a specificity of 87.5%;while the same cutoff value to predict intraventricular dyssynchrony only yielded a sensitivity of 44.1% and specificity of 73.6%.Conclusion Intraventricular dyssynchrony and(or) interventricular dyssynchrony has a high prevalence in patients with SHF.A QRS duration cutoff value higher 135 ms can well evaluate the cardiac mechanical dyssynchrony in clinical practice,which may be of value for optimizing selection of CRT candidates and reducing the nonresponders.