Lv S.-S.,Shandong University |
Liu G.,Shandong University |
Wang J.-P.,Yuhuangding Hospital of Yantai City |
Wang W.-W.,Shandong University |
And 6 more authors.
Mesenchymal stem cells (MSCs) treatment has been shown to be effective in diabetic nephropathy (DN). However, the mechanisms involved in the renoprotective effects of MSCs have not been clearly demonstrated. Especially, there was no study on the relationship ofMSCs and macrophages in diabetic kidney. To explore the effect of MSCs on macrophages in DN, streptozotocin- induced diabetes animals received no treatment or treatment with MSCs (2 × 106, via tail vein) for two continuous weeks. Eight weeks after treatment, physical, biochemical and morphological parameters were measured. Immunohistochemistry for fibronectin (FN), CollagenI, ED-1, monocyte chemoattractant protein-1 (MCP-1) was performed. Expressions of pro-inflammatory cytokines and hepatocyte growth factor (HGF) at gene level and protein level were determined by real-time reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay, respectively. Blood glucose, urinary albumin excretion, creatinine clearance were significantly reduced after MSCs treatment. The glomerulosclerosis as revealed by periodic acid Schiff stain and expression of FN and CollagenI was also dramatically attenuated.Most importantly, the expression of MCP-1 and the number of infiltratedmacrophages in kidney were effectively suppressed by MSCs treatment. The expression of HGF in MSCs group was up-regulated. Meanwhile, the expressions of IL-1β, IL-6 and TNFα were significantly down-regulated by MSCs treatment. Our study suggest that MSCs treatment ameliorates DN via inhibition of MCP-1 expression by secreting HGF, thus reducing macrophages infiltration, down-regulating IL-1β, IL-6, TNFα expression in renal tissue in diabetic rats. © 2013 Elsevier B.V. All rights reserved. Source
Cheng J.,Shandong University |
Wang J.,Yuhuangding Hospital of Yantai City |
Liu Y.,Shandong University |
Sun A.,Shandong University |
And 4 more authors.
Aims: To further explore the mechanisms of apoptosis in mononephrectomized rats with renal lymph circulation disorder. Methods: Animals were divided into three groups: rats with left renal lymph ligation and right nephrectomy (KL), rats with only right nephrectomy (KN) and sham-operated rats (sham). 24-h proteinuria and serum creatinine level were monitored. Indexes of oxidative stress were measured. Renal apoptosis was examined. Further biochemical analysis was provided using real-time PCR, western blot and Elisa techniques. Results: Our results showed that renal lymphatic ligation induced renal tubular epithelial cell apoptosis and aggravated renal dysfunction in mononephrectomized rats. In addition, renal lymphatic ligation increased the activities of caspase-3, caspase-8 and caspase-9. Further investigation of mechanisms showed that renal lymphatic ligation up-regulated Fas expression, increased the ratio of Bax/Bcl-2, and also increased the levels of reactive oxygen species (ROS), malondialdehyde (MDA) while reducing superoxide dismutase (SOD) activity. Conclusion: These results indicated that disturbance of renal lymphatic circulation might lead to tubular epithelial cell apoptosis through activation of intrinsic and extrinsic apoptotic pathways, suggestive of an essential role of renal lymphatic circulation in the maintenance of tubular integrity and function. ©2013 Dustri-Verlag Dr. K. Feistle. Source
Huang H.,Shandong University |
Ji H.,Yuhuangding Hospital of Yantai City |
Tian H.,Shandong University
Primary spontaneous pneumothorax recurs at a certain rate after thoracoscopic surgery, and risk factors for that recurrence are in question. The medical records of 248 patients with primary spontaneous pneumothorax who were followed for more than 2 years after thoracoscopic surgery were reviewed and retrospectively analyzed. Univariate and multivariate binary logistic regression analysis were used to identify possible risk factors. Twelve patients experienced the recurrence of primary spontaneous pneumothorax. Patients who experienced the recurrence of primary spontaneous pneumothorax were younger than patients who experienced no recurrence. A larger proportion of the patients who experienced recurrence did not undergo pleurodesis. The variables age, height, weight, body mass index, duration of air leakage, and pleurodesis (performed or not) with a p value less than 0.2 in univariate analysis were entered in multivariate analysis. A younger age and not undergoing pleurodesis were associated with a higher risk of postoperative ipsilateral recurrence of primary spontaneous pneumothorax. Not undergoing pleurodesis and a younger age are possible risk factors for recurrence of primary spontaneous pneumothorax after thoracoscopic surgery. Thoracic surgeons should pay more attention to pleurodesis, especially in younger patients. Source
Wang B.,Binzhou Medical University |
Qu H.,Binzhou Medical University |
Ma J.,Yantai University |
Sun X.,Binzhou Medical University |
And 3 more authors.
Journal of Chemistry
The purpose of this study is to clarify the cardioprotective property of the aqueous extract of Elaeagnus angustifolia L. leaf (EA) against myocardial ischemia/reperfusion injury in isolated rat heart. The myocardial ischemia/reperfusion (I/R) injury model of isolated rat heart was set up by the use of improved Langendorff retrograde perfusion technology. Compared with the ischemia/reperfusion (I/R) group, the aqueous extract of Elaeagnus angustifolia L. leaf (0.5 mg/mL, 1.0 mg/mL) pretreatment markedly improved the coronary flow (CF) and raised left ventricular developed pressure (LVDP) and maximum rise/down velocity (±dp/dtmax). The infarct size of the EA-treated hearts was smaller than that of I/R group. After treatment with EA, the superoxide dismutase (SOD) activity increased; malondialdehyde (MDA) and protein carbonyl content reduced more obviously (P<0.01) than that of I/R injury myocardial tissue. Conclusion. Results from the present study showed that the aqueous extract of Elaeagnus angustifolia L. leaf has obvious protective effects on myocardial I/R injury, which may be related to the improvement of myocardial oxidative stress states. © 2014 Binsheng Wang et al. Source