TGF-β1对胃癌细胞增殖、凋亡及miR-302a和AKT通路的影响

目的探究转化生长因子-β1(TGF-β1)对胃癌细胞增殖、凋亡及miR-302a和AKT通路的影响.方法在含有TGF-β1(0、1、5、10 ng/ml)的培养基培养胃癌细胞系BGC-823,MTT法检测细胞增殖情况;平板克隆形成实验检测细胞克隆形成数量;Hoechst33258染色观察细胞形态;流式细胞术检测细胞凋亡以及周期阻滞情况;实时荧光定量PCR(qRT-PCR)检测细胞miR-302a表达;蛋白印迹(WB)法检测p-PI3K、AKT、p-AKT蛋白表达情况.结果与Control组相比,TGF-β1处理组细胞增殖抑制率、细胞凋亡率升高,细胞克隆数量降低,且随着TGF-β1浓度的增加,细胞增殖抑制率、细胞凋亡率逐渐升高,细胞克隆数量逐渐降低(P<0.05).与Control组相比,TGF-β1处理组G1期细胞比例显著增加,G2期细胞比例显著降低,且随着TGF-β1浓度的增加,G1期细胞比例逐渐增加,G2期细胞比例逐渐降低(P<0.05).与Control组相比,TGF-β1处理组miR-302a表达升高,p-PI3K、p-AKT蛋白表达水平均显著降低,且随着TGF-β1浓度的增加,miR-302a表达逐渐升高,p-PI3K、p-AKT蛋白表达逐渐降低(P<0.05).结论TGF-β1可能通过上调miR-302a表达、抑制AKT通路,使细胞G1期阻滞,从而抑制胃癌细胞增殖,促进其凋亡.     

The DI–DII linker of human parainfluenza virus type 3 fusion protein is critical for the virus

Virus Genes - Human parainfluenza virus type 3 (HPIV3) causes the majority of childhood viral pneumonia around the world. Fusing the viral and target cell membranes is crucial for its entry into...     

How the public uses social media wechat to obtain health information in china: a survey study

Background

On average, 570 million users, 93% in China’s first-tier cities, log on to WeChat every day. WeChat has become the most widely and frequently used social media in China, and has been profoundly integrated into the daily life of many Chinese people. A variety of health-related information may be found on WeChat. The objective of this study is to understand how the general public views the impact of the rapidly emerging social media on health information acquisition.

Methods

A self-administered questionnaire was designed, distributed, collected, and analyzed utilizing the online survey tool Sojump. WeChat was adopted to randomly release the questionnaires using convenience sampling and collect the results after a certain amount of time.

Results

(1) A total of 1636 questionnaires (WeChat customers) were collected from 32 provinces. (2) The primary means by which respondents received health education was via the Internet (71.79%). Baidu and WeChat were the top 2 search tools utilized (90.71% and 28.30%, respectively). Only 12.41% of respondents were satisfied with their online health information search. (3) Almost all had seen (98.35%) or read (97.68%) health information; however, only 14.43% believed that WeChat health information could improve health. Nearly one-third frequently received and read health information through WeChat. WeChat was selected (63.26%) as the most expected means for obtaining health information. (4) The major concerns regarding health information through WeChat included the following: excessively homogeneous information, the lack of a guarantee of professionalism, and the presence of advertisements. (5) Finally, the general public was most interested in individualized and interactive health information by managing clinicians, they will highly benefit from using social media rather than Internet search tools.

Conclusions

The current state of health acquisition proves worrisome. The public has a high chance to access health information via WeChat. The growing popularity of interactive social platforms (e.g. WeChat) presents a variety of challenges and opportunities with respect to public health acquisition.

     

Resection of Hilar Cholangiocarcinoma Combined with Left Hepatectomy and Common Hepatic Arteriectomy without Reconstruction

Background/Aims: To detect the feasibility of using synchronous bile duct, left lobe of liver and common hepatic artery resection without reconstruction to improve the therapeutic efficacy of HC. Methodology: A total of 19 patients with hilar cholangiocarcinoma undergoing left-sided hepatectomy, hepatic artery resection and right hepatic duct-jejunum anastomosis from June 2005 to May 2010 in our team were included prospectively in this study. Results: One case died from probable sudden myocardial infarction before discharge from hospital. Little bile leakage occurred in one case. No hepatic insufficiency developed in any cases. A follow-up of 6-66 months was applied and 11 cases were still alive at the end. Conclusions: Hepatic Arteriectomy is viable with lower total bilirubin and the excision weight up to about 30% of the standard liver.