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Chongqing, China

Li X.,Urologic | Li X.,Chongqing Medical University | Song B.,Urologic | Song B.,Chongqing Medical University | And 8 more authors.
Pakistan Journal of Medical Sciences | Year: 2012

Objectives: Upper urinary tract damage secondary to voiding dysfunction is an important reason for the end stage of renal diseases. We evaluated clinical manifestations and outcomes of various treatments, and analyzed underlying mechanism in order to improve guidance for their therapy. Methodology: Two hundred seventy one patients suffering from upper urinary tract damage caused by voiding dysfunction diseases from Jan. 1999 to Oct. 2009 were enrolled and data of urodynamics, urinary imaging and renal functions before and after treatments were retrospectively analyzed. Results: Bladder pressure was over 40 cmH 2O in 78.2% of the patients, and among them, the average pressures for the first voiding desire was 42.3±6.0 cmH 2O with the maximum bladder pressure of 67.3±5.8cmH 2O in 271 patients. In 157 patients the residual urine bladder volume was 100ml, but smaller and moderate residual urine volume was occurring in 37.9% of the upper urinary tract damage patients, which implied that residual urine is not an appropriate indicator. 89.3% of the patients exhibited bladder outlet obstruction and 95.2% of those suffered moderate to severe LUTS. After the relief of obstruction treatment and resulting intravesical pressure reduction, 264 patients showed a good recovery and in 202 of them hydronephrosis have disappeared and their renal function returned to normal, due to reduced bladder pressure. Conclusions: We found that high bladder pressure is the main reason of upper urinary tract damage caused by voiding dysfunction. Thus, attention should be paid in order to achieve and maintain reduced bladder pressure below the safety line. Source

Zhang C.,Institute of Combined Injury | Zhang C.,Chongqing Medical University | Peng Y.,Institute of Combined Injury | Wang F.,Institute of Combined Injury | And 13 more authors.
Biomaterials | Year: 2010

Failure to cure many cancers once they are disseminated has been attributed to the presence of resistant cancer stem cells. Cantharidin, a natural compound isolated from the beetles and other insects has been traditionally used as anticancer agent, but limited by its significant toxicity. It has shown that cantharidin can force cancer cells prematurely into cell cycle and subsequently induce apoptotic cell death through the inhibition of protein phosphatase 2A (PP2A). In this study, we showed that a synthesized analog of cantharidin, LB1, with significant PP2A inhibition activity but without apparent toxicity, greatly enhanced the effectiveness of the standard anti-sarcoma chemotherapeutic agent, doxorubicin (DOX), in the xenograft growth inhibition and lung metastases prevention of an aggressive sarcoma derived from transformed mesenchymal stem cells in syngeneic rats. We report here on the possibility of, pharmacologic inhibition of PP2A with low toxicity cantharidin derivatives may be a useful strategy to enhance the effectiveness of DNA-damaged chemotherapeutic drugs against stem cell-derived cancer. © 2010 Elsevier Ltd. Source

Zhang C.,Institute of Combined Injury | Zhang C.,Chongqing Medical University | Wang S.,Institute of Combined Injury | Xiao J.,Institute of Combined Injury | And 6 more authors.
Biomaterials | Year: 2010

We describe a near-infrared fluorescent heptamethine dye (IR-780 iodide) with unique properties for sentinel lymph node (SLN) mapping in both small and large animals. This dye has a significant photobrightening effect in serum and a long retention time in the lymphatic system which allows to acquire much higher signal-to-noise ratios. Injection of only 10 nmol of this dye permits SLNs to be imaged easily in pigs using excitation fluence rates of only 2 μW/cm2. In addition, this dye has a unique stability property after formalin fixation in tissues which raises the possibility of developing new and sensitive means of detecting lymph nodes in harvested surgical specimens. This dye can be completely cleared from the circulation in a couple of days and does not cause acute systemic toxicity. © 2009 Elsevier Ltd. All rights reserved. Source

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