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Zhengzhou, China

Zhengzhou University , colloquially known in Chinese as Zhèngdà is a public university located in Zhengzhou, Henan, People's Republic of China.It has the largest area of any university in China at 4,328,688 square meters. Wikipedia.

Analysis of the efficacy and timing of plasma exchange (PE) in the treatment of acute fatty liver of pregnancy (AFLP). The clinical data of 39 cases of AFLP treated with PE from September 2004 to March 2011 include symptoms, physical signs, adverse effects, and all relevant laboratory test results before and after PE. (1) Adverse reactions during PE were generally mild and tolerable, and no patients discontinued treatment due to adverse events; symptoms, physical signs, and liver and kidney functions improved significantly after PE (P<0.05); (2) of the 39 cases treated, 37 were cured, 2 died, with a cure rate of 94.87%; (3) of the 37 cases cured, the sooner a patient received PE the faster the recovery and the fewer number of PEs needed for a complete recovery (P<0.01). Treatment of AFLP by PE is safe and effective, and timely application of PE in the early phase of the disease can effectively halt and reverse the progression of AFLP. Source

Single-walled carbon nanotubes (SWNT) are poorly soluble in water, so their applications are limited. Therefore, aqueous solutions of SWNT, designed by noncovalent functionalization and without toxicity, are required for biomedical applications. In this study, we conjugated docetaxel with SWNT via π-π accumulation and used a surfactant to functionalize SWNT noncovalently. The SWNT were then conjugated with docetaxel (DTX-SWNT) and linked with NGR (Asn-Gly-Arg) peptide, which targets tumor angiogenesis, to obtain a water-soluble and tumor-targeting SWNT-NGR-DTX drug delivery system. SWNT-NGR-DTX showed higher efficacy than docetaxel in suppressing tumor growth in a cultured PC3 cell line in vitro and in a murine S180 cancer model. Tumor volumes in the S180 mouse model decreased considerably under near-infrared radiation compared with the control group. The SWNT-NGR-DTX drug delivery system may be promising for high treatment efficacy with minimal side effects in future cancer therapy. Source

Nie B.,Zhengzhou University
Journal of magnetic resonance imaging : JMRI | Year: 2010

To automatically extract regions of interest (ROIs) and simultaneously preserve the anatomical characteristics of each individual, we developed a new atlas-based method utilizing a pair of coregistered brain template and digital atlas. Unlike the previous atlas-based method, this method treats each individual as the target image, and the template and atlas are each transformed to register with the individual. To evaluate the accuracy of this method we implemented it in extracting the hippocampus from two groups of T(2)-weighted structural images with different spatial resolutions and a group of T(2)*-weighted functional images. Furthermore, the results were compared against a manually segmented hippocampus and an atlas-derived hippocampus. Jaccard similarity (JS) reached 84.7%-90.5%, and relative error in volume (RV) was 4.8%-12.7%. The consistency observed between the results of the proposed method and manual drawing was therefore considerable. We developed a new atlas-based method for ROI extraction that can automatically extract ROI and simultaneously preserve each individual's unique anatomical characteristics. Source

Sagar S.K.,Zhengzhou University
Saudi journal of kidney diseases and transplantation : an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia | Year: 2013

The objective of this study was to detect the expression of Angiotensin-II (Ang-II), Hypoxia-inducible factor-1α (HIF-1α) and Endothelin-1 (ET-1) in the kidneys of patients with diabetic nephropathy (DN) and to investigate their relationship with renal interstitial fibrosis (RIF). A total of 47 paraffin specimens of patients with DN and six controls were enrolled in this study, and all were diagnosed by histopathology. We studied the expressions of Ang-II, HIF-1α and ET-1 by immuno-histochemical staining and the level of RIF by Masson staining. The following results were found: (a) RIF existed in the kidneys of patients with DN, (b) the expressions of Ang-II, HIF-1α and ET-1 were lower in the control group but increased significantly in the DN group, (c) the expression of Ang-II, HIF-1α and ET-1 in tubular epithelial cells directly correlated with RIF (r s = 0.659, 0.633, 0.716, P <0.01) and (d) the expression of Ang-II, ET-1 and HIF-1α in the kidneys of patients with DN positively correlated with serum creatinine (Scr) levels (r s = 0.391, 0.594, 0.531, P <0.01) but they did not correlate with the 24-h urinary protein, blood glucose and serum albumin levels. These results provide new insights suggesting that over-expression of Ang-II, HIF-1α and ET-1 promote the progression of RIF in DN. Thus, targeting reduction in the expression of Ang-II, HIF-1α and ET-1 can delay RIF in DN. Further studies are needed to validate this observation. Source

Toxic cyanobacterial blooms in freshwater have been considered as threats to human health. Microcystins are a family of cyclic polypeptides produced by cyanobacteria and are toxic to plants and animals. Microcystin-LR (MC-LR) is the most toxic variant among the microcystin family and could cause oxidative stress in various organs, including the reproduction system. The aim of this study was to investigate the effect of MC-LR on apoptosis of Sertoli cells that play an essential role in the development and maturation of sperm cells. Sertoli cells were isolated from healthy immature rats and cultured with MC-LR. The viability of Sertoli cells was decreased after treatment with MC-LR at 10 μg/ml for 24 h (P < 0.05). Moreover, the MC-LR-treated cells exhibited condensed chromatin and fragmented nuclei, features of apoptosis, as judged by Hoechst 33258 staining. We also analyzed the mRNA and protein levels of three apoptosis-related genes, p53, bax and bcl-2, using reverse transcription-polymerase chain reaction and Western blot analyses, respectively. Both p53 and bax function as promoters of apoptosis, while bcl-2 is an apoptotic suppressor. The mRNA and protein expression levels of p53 and bax were increased in Sertoli cells treated with MC-LR at 10 μg/ml compared with the control group (P < 0.05), while the bcl-2 protein levels were decreased in cells treated with MC-LR at 10 μg/ml (P < 0.05). Moreover, caspase-3 activity that is involved in the induction of apoptosis was significantly increased in Sertoli cells treated with MC-LR. These results indicate that MC-LR induces apoptosis of Sertoli cells. Source

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