ABSTRACT
BACKGROUND@#Abnormal type I collagen (COL1) expression is associated with the development of many cardiovascular diseases. The TGF-beta/Smad signaling pathway and circRNAs have been shown to regulate COL1 gene expression, but the underlying molecular mechanisms are still not fully understood.@*METHODS@#Gain- and loss-of-function experiments were prformed to study the effect of circZBTB46 on the expression of alpha 2 chain of type I collagen (COL1A2). Co-immunoprecipitation assay was performed to observe the interaction between two proteins. RNA immunoprecipitation assay and biotin pull-down assay were performed to observe the interaction of circZBTB46 with PDLIM5.@*RESULTS@#In this study, we investigated the role of circZBTB46 in regulating COL1A2 expression in human vascular smooth muscle cells (VSMCs). We found that circZBTB46 is expressed in VSMCs and that TGF-beta inhibits circZBTB46 formation by downregulating KLF4 expression through activation of the Smad signaling pathway. CircZBTB46 inhibits the expression of COL1A2 induced by TGF-beta. Mechanistically, circZBTB46 mediates the interaction between Smad2 and PDLIM5, resulting in the inhibition of Smad signaling and the subsequent downregulation of COL1A2 expression. Furthermore, we found that the expression of TGF-beta and COL1A2 is decreased, while circZBTB46 expression is increased in human abdominal aortic aneurysm tissues, indicating that circZBTB46-mediated regulation of TGF-beta/Smad signaling and COL1A2 synthesis in VSMCs plays a crucial role in vascular homeostasis and aneurysm development.@*CONCLUSIONS@#CircZBTB46 was identified as a novel inhibitor of COL1 synthesis in VSMCs, highlighting the importance of circZBTB46 and PDLIM5 in regulating TGF-beta/Smad signaling and COL1A2 expression.
ABSTRACT
Solitary fibroma is a rare spindle cell tumor.This article reports a case of bladder solitary fibroma to introduce its clinical diagnosis and treatment.The patient,male,43 years old,was admitted to the hospital because of "discovery of gross hematuria for 2 days".CT scan suggested the space-occupying lesion of the bladder area.Pathological results showed the spindle cell tumor.Further immunohistochemistry suggested lowgrade malignant solitary fiber tumor.
ABSTRACT
Objective To compare the curative effect and safety of Shang ring circumcision and conventional circumcision .Methods Retrospectively analyzed the clinical data of 329 adult patients who were admitted into our hospital from January 2013 to May 2015, including 205 cases of Shang ring circumcision and 124 cases of conventional circumcision .The operation time , intraoperative and postoperative VAS pain scores , intraoperative bleeding , wound healing time , complications , and degree of penile appearances and overall satisfaction between the two groups were compared .Results Compared with conventional circumcision , Shang ring circumcision was associated with shorter oper-ative time, less intraoperative blood loss , lower intraoperative and postoperative VAS pain scores , lower adverse event rate , higher penile ap-pearances and overall satisfaction , and the difference was statistically significant (P<0.05).Conclusion Shang ring circumcision may be a safer and more effective choice in comparison with conventional circumcision for male patients , as it can shorten the time of operation and save the cost of health care .