Survey on reproductive health related knowledge and attitude among teen-agers in Shanghai / 上海预防医学

Objective To understand the current status of knowledge, attitude and behaviors on reproductive health among the teen-agers in Shanghai. Methods During May to September 2013, the survey was conducted among 4 942 students in eight high schools, eight vocational high schools, eight middle schools and two universities in four districts in Shanghai, using stratified cluster sampling method. Results The subjects included 2 456 males and 2 486 females with an average age of (16.84 ±1.53). The teen-agers had a low level of knowledge on reproductive health, especially the knowledge of pregnancy and contraception, and there was significant difference in gender and age groups respectively.The attitude towards sex-related behaviors was open.The acceptance rate of premarital sexual behavior, unmarried cohabitation, premarital pregnancy, one-night stand and multiple sexual partners was 66.9%, 62.7%, 34.0%, 28.1%, and 28.1% respectively.According to multivariate logistic regression analysis, the acceptance of premarital sexual behavior was correlated to gender, education level, knowledge of condom and sexually transmitted diseases, and love behavior ( P <0.05 ) . Conclusion The teen-agers in Shanghai have poor knowledge of reproductive health and an open attitude towards sex-related behaviors.It is important to pay attention to the education and guidance of teen-agers'reproductive health knowledge, so as to help them build a complete and comprehensive system on reproductive health knowledge and skills.

The relationship between endoplasmic reticulum stress and its particular apoptosis way caspase-12 and apoptosis in renal cortex of diabetic rats / 中国应用生理学杂志

<p><b>OBJECTIVE</b>To investigate the expressions of 78-kDa glucose-regulated protein (GRP78) and Caspase-12 and their relationship with apoptosis in renal cortex of diabetic rats.</p><p><b>METHODS</b>Uninephrectomized Wistar rats were used to induce diabetes by intraperitoneal injection of Streptozotocin (STZ 65 mg/kg). After 8 weeks, the expression and distribution of GRP78, Caspase-12, proliferating cell nuclear antigen (PCNA) were examined by immunohistochemistry. Flow cytometry was used to detect the levels of protein of GRP78 and Caspase-12. Apoptosis was evaluated by means of terminal deoxynucleotidyl transferase-mediated d-UDP nick-end labeling (TUNEL) and Flow cytometry. Serum creatinine, blood urea nitrogen and 24-hour urine protein excretion were checked.</p><p><b>RESULTS</b>Compared with those in normal control group, the numbers of apoptosis and the expression of GRP78, Caspase-12 in glomerular and tubular cells were much higher in the diabetic kidneys at 8 weeks. There was no significant difference between group A and group B.</p><p><b>CONCLUSION</b>Activation of endoplasmic reticulum stress may play an important role in the development of diabetic nephropathy.</p>

High fat diet induced the expression of SREBP-1, TGF-beta1 and alpha-SMA in renal tubular cells and extracellular matrix accumulation in Wistar rats / 中国应用生理学杂志

<p><b>OBJECTIVE</b>To explore the effect of high fat diet on the expression of sterol regulatory element binding protein-1 (SREBP-1), transforming growth factor-beta1 (TGF-beta1) and alpha-smooth muscle actin (alpha-SMA) in renal tubular cells and extracellular matrix accumulation in Wistar rats.</p><p><b>METHODS</b>The Wistar rats were treated with high fat diet for 12 weeks and renal lipid deposit was detected by the method of Oil Red O staining. The immunohistochemistry and Western blot were used to investigate the expression of SREBP-1, TGF-beta1, alpha-SMA and fibronectin (FN) protein. The expression of SREBP-1 mRNA was determined with in situ hybridization. Masson staining was for the detection of extracellular matrix (ECM) accumulation.</p><p><b>RESULTS</b>The weight of rats raised by high fat diet increased, in company with the high serum glucose, serum triglyceride and serum insulin. The Oil Red O staining revealed that the renal proximal tubular epithelial cells showed significant lipid droplet in high fat diet rats. SREBP-1 protein and mRNA were located in the renal tubular cells and the expressions of high fat diet rats were higher than those of normal control rats. They were respectively 1.88 times and 1.85 times than those of normal control group. TGF-beta1 and alpha-SMA protein were also located in renal tubular cells and high fat diet up-regulated the expression of them. ECM accumulation was detected with Masson staining and the result showed that high fat diet treatment increased interstitial ECM product and FN protein was found high expression.</p><p><b>CONCLUSION</b>High fat diet may induce lipid droplet deposit in renal tubular cells by up-regulation of the expression of SREBP-1, which causes ECM accumulation by increasing the expression of TGF-beta1 and alpha-SMA.</p>

Effect of JAK/STAT pathway activation on high glucose-induced transdifferentiation in renal proximal tubular epithelial cells / 中国医学科学院学报

<p><b>OBJECTIVE</b>To evaluate the effect of JAK/STAT signaling pathway activation on the transdifferentiation and secretion of transforming growth factor-beta1 (TGF-beta1) induced by high glucose in renal proximal tubular epithelial cells.</p><p><b>METHODS</b>Human kidney cells (HKC) were cultured and then divided into four groups: low glucose (LG) group, high glucose (HG) group, high mannitol (LG + M) group, and HG + AG490 group. Immunoprecipitation and Western blot analysis were used to determine the expression of tryosine phosphorylated Janus kinase 2 ( p-JAK2). The protein expressions of STAT1, STAT3, p-STAT1, and p-STAT3 and the expressions of alpha-SMA and E-Cadherin were observed by Western blot. The contents of TGF-B1, fibronectin and type I collagen in the supernatants of the cultured HKC were detected by enzyme-linked immunosorbent assay (ELISA). The expression of TGF-beta1 mRNA was measured by reverse transcription and polymerase chain reaction (RT-PCR).</p><p><b>RESULTS</b>Compared with LG group, the expressions of JAK2, p-STAT1, p-STAT3, and TGF-beta1, mRNA were significantly increased in HG group from 6 to 72 hours. Meanwhile, the contents of TGF-beta1 and collagen I in the supernatants and the expression of alpha-SMA increased and the expression of E-Cadherin decreased. The expressions of JAK2, p-STAT1, p-STAT3, and TGF-beta mRNA as well as the levels of TGF-beta1 and collagen I in the supernatant s in HG + AG490 group were significantly lower than in the HG group. The expressions of alpha-SMA and E-Cadherin were also decreased in HG + AG490 group.</p><p><b>CONCLUSION</b>Activation of JAK/STAT signaling pathway may be involved in the high glucose-induced transdifferentiation and overproduction of TGF-beta1, and ECM proteins in HKCs.</p>

Expression of CD44 and nm23-H1 protein in the primary and metastatic lymph node lesions in supraglottic and hypopharyngeal cancer / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To study the metastasis feature of the primary and metastatic lymph node lesions in supraglottic or hypopharyngeal cancer.</p><p><b>METHODS</b>The expression of CD44 and nm23-H1 in specimens from the primary and metastatic lymph node lesions of the 41 cases with supraglottic or hypopharyngeal cancer were studied with immunohistochemistry method and flow cytometry.</p><p><b>RESULTS</b>No correlation was found between the expression of CD44, nm23-H1 and the tumor differentiation of the supraglottic or hypopharyngeal cancer, but their expression related with the clinical staging. The CD44 and nm23-H1 positive expression rates in the primary and metastatic lymph node lesions were 75.6% (31/41), 85.4% (35/41) and 34.1% (14/41), 26.8% (11/41) respectively (P >0.05). The average fluorescence index of CD44 and nm23-H1 in the primary and metastatic lymph node lesions were 1.27 +/- 0.18, 1.33 +/- 0.16 and 1.11 +/- 0.19, 1.08 +/- 0.15 (x +/- s) respectively (P >0.05).</p><p><b>CONCLUSIONS</b>The expressions of CD44 and nm23-H1 in the metastatic lymph node tumor had no difference compared with that in primary tumor of the supraglottic or hypopharyngeal cancer. The difference of metastasis potentials between the primary and metastatic lymph node lesions in the same patient was not proved in this study and should be further investigated from multiple oncogens markers.</p>

Effects of puerarin on renal function, expressions of MMP-2 and TIMP-2 in diabetic rats / 药学学报

<p><b>AIM</b>To investigate the effect of puerarin on expressions of MMP-2 and TIMP-2 in the kidney of diabetic rats.</p><p><b>METHODS</b>Uninephrectomized male Wistar rats were used to induce diabetes by intraperitoneal injection of streptozocin (65 mg x kg(-1)). Puerarin was given daily by intraperitoneal injection from the third day of induction of diabetes for 16 weeks. Using in situ hybridization and immunohistochemistry to detect MMP-2, TIMP-2 mRNA expressions and MMP-2, TIMP-2, collagen IV and Laminin expressions in diabetic kidneys with image analysis system, Flow cytometry was used to detect the expressions of TGFbeta1, MMP-2 and TIMP-2.</p><p><b>RESULTS</b>Compared with those in kidneys of control group, expressions of MMP-2 mRNA and proteins were lower, while the expressions of both TGFbeta1 and TIMP-2 were higher in the diabetic kidney (P < 0.05). The level of MMP-2 expression was advanced, while expression of TIMP-2 was reduced by puerarin treatment (P < 0.05).</p><p><b>CONCLUSION</b>Puerarin showed some renal protective effect on diabetic nephropathy, partly through inhibition of excessive deposition of glomeruli extracellular matrix by up-regulating MMP-2 and down-regulating TIMP-2 expressions besides reducing the blood glucose.</p>

Effects of benazepril on apoptosis in the kidney of diabetic rats / 药学学报

<p><b>AIM</b>To investigate the effects of angiotensin converting enzyme inhibitor (ACEI) on apoptosis and the expression of Fas and Fas-L in the kidney of diabetic rats.</p><p><b>METHODS</b>Uninephrectomized Spraque-Dawley rats were used to induce diabetes by intraperitoneal injection of streptozotocin (65 mg.kg-1). Benazepril (10 mg.kg-1) was given daily by gavage from the next day of the induction to diabetes for 12 weeks. Apoptosis was evaluated by means of terminal-deoxynucleotidyl transferase mediated d-UTP nick end labeling (TUNEL). Flow cytometry and immunohistochemistry were used to detect the expression of Fas and Fas-L.</p><p><b>RESULTS</b>Compared with those in the kidneys of control group, apoptotic cells were more in number and the expression of Fas and Fas-L was higher in the diabetic kidneys (P < 0.05). The number of apoptotic cells and the level of expression of Fas and Fas-L were reduced by benazepril treatment (P < 0.05).</p><p><b>CONCLUSION</b>Angiotensin converting enzyme inhibitor benazepril showed some renal protective effect on diabetic nephropathy, partly through inhibiting apoptosis by down-regulating Fas and Fas-L expression.</p>

Effect of fluvastattn on extracelluar signal-regulated kinase activity in glomerular mesangial cells exposed to high glucose concentration / 中华内分泌代谢杂志

When the glomerular mesangial cells of rats were cultured in vitro at high glucose concentration,the activity of extraeellular signal-regulated kinase(ERK),the expression of transforming growth factor-?_1(TGF-?_1)mRNA and the content of typeⅣcollagen in the supematant were higher than those at normal glucose concentration.These effects were inhibited by fluvastatin.The results showed that the activation of ERK signal transduction pathways appeared to play a role in the onset and progression of diabetic nephropathy. Furthermore,fluvastatin could protect the kidney by inhibiting ERK signal transduction pathway and TGF-?_1 expression.