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PubMed | Qingdao Municipal Hospital Qingdao, Binzhou Medical University, Traditional Chinese Medicine Hospital of Zhangqiu Zhangqiu, Shandong Electrical Power Central Hospital Jinan and Shandong University
Type: Journal Article | Journal: International journal of clinical and experimental pathology | Year: 2015

The aim of this study was to assess the effects of hydrogen sulfide on high glucose-induced mouse podocyte (MPC) injury and the underlying mechanisms. Mouse podocytes were randomly divided into 4 groups, including high glucose (HG), normal glucose (NG), normal glucose + DL-propargylglycine (PPG), and high glucose + NaHS (HG + NaHS) groups for treatment. Then, ZO-2, nephrin, -catenin, and cystathionine -lyase (CSE) protein expression levels were determined by western blot. We found that high glucose significantly reduced nephrin, ZO-2, and CSE expression levels (P<0.05), and overtly elevated -catenin amounts (P<0.05), in a time-dependent manner. Likewise, PPG at different concentrations in normal glucose resulted in significantly lower CSE, ZO-2, and nephrin levels (P<0.05), and increased -catenin amounts (P<0.05). Interestingly, significantly increased ZO-2 and nephrin levels, and overtly reduced -catenin amounts were observed in the HG + NaHS group compared with HG treated cells (P<0.01). Compared with NG treated cells, decreased ZO-2 and nephrin levels and higher -catenin amounts were obtained in the HG + NaHS group. In conclusion,CSE downregulation contributes to hyperglycemia induced podocyte injury, which is alleviated by exogenous H2S possibly through ZO-2 upregulation and the subsequent suppression of Wnt/-catenin pathway.

PubMed | Fudan University, Linyi Peoples Hospital Linyi 276000, Qingdao Municipal Hospital Qingdao and Linyi Peoples Hospital Linyi
Type: Journal Article | Journal: International journal of clinical and experimental pathology | Year: 2014

To explore whether lidocaine has the synergistic effect with pingyangmycin (PYM) in the venous malformations (VMs) treatment.The mouse spleen was chosen as a VM model and injected with different concentration of lidocaine or PYM or jointly treated with lidocaine and PYM. After 2, 5, 8 or 14 days, the mouse spleen tissues were acquired for hematoxylin-eosin (HE) staining, transmission electron microscopy (TEM) analysis, TUNEL assay and quantitative RT-PCR analysis to examine the toxicological effects of lidocaine and PYM on splenic vascular endothelial cells.0.4% of lidocaine mildly promoted the apoptosis of endothelial cells, while 2 mg/ml PYM significantly elevated the apoptotic ratios. However, the combination of 0.2% lidocaine and 0.5 mg/ml PYM notably elevated the apoptotic ratios of splenic cells and severely destroyed the configuration of spleen, compared to those of treatment with 0.5 mg/ml PYM alone.Lidocaine exerts synergistic effects with PYM in promoting the apoptosis of mouse splenic endothelial cells, indicating that lidocaine possibly promotes the therapeutic effects of PYM in VMs treatment via synergistically enhancing the apoptosis of endothelial cells of malformed venous lesions.

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