Objective To study histone acetylation patterns in peripheral boiood mononuclear cells (PBMC) from type 2 diabetic patients PBMC form 12type 2 diabetic patients and 12 healthy contrcl subiects were collecyed The global histone H3/H4 acetylation was determined by assay kit The differetial expression of the histone acetyltransferases and histone deacetylases were measured by real time PCR.Results increased H3/H4 acetylation was observed in PBMC of type 2 diabetic patients compared with control subjects (H3:0.134±0.035vs0.181±0.032,p<0.05;H4:0.266±0.070VS0.324±0.062,P<0.01).the mRNA levels of p300,CREBBP,HDAC2,HDAC7,and STRTL in patients PBMC compared with healthy control subieects were 3.11±0.38,2.78±0.45,3.55±0.30,0.77±0.37 and 0.40±0.25 folds respectively conclusion histone acetylation appears abnormal in PBMC of type 2 diabetic patients.

Objective To investigate the relationship between spontaneous miscarriage and embryonic chromosome abnormalities,and to evaluate the clinical application of karyotype analysis by chorionic villus cell culture. Methods The chorionic villus karyotype of 1983 cases of miscarriage from January 2010 to July 2016 in Guangzhou Women and Children′ s Mecical Center were analyzed retrospectively. The miscarried chorionic villi were obtained by curettage under sterilized condition. The chromosome specimens were prepared after chorionic villus cell culture. Karyotype analysis was performed by G-banding technique. Results In the 1983 samples, successful karyotype analysis was performed in 1770 cases, with the successful rate of 89.98%. Chromosomal abnormalities were found in 1038 cases (58.64%,1038/1770). Chromosomal structural abnormalities were found in 37 cases. The numeral abnormalities were more common than structural abnormalities, and most of the numeral abnormalities were aneupoidies. In turn, they were trisomy 16, 45,X, trisomy 22, trisomy 2, trisomy 21, trisomy 15. The most common structural abnormality was balanced translocation, including Robersonian translocation. Female embryoes accounted for 61.02%(1080/1770) miscarriages and for 57.4%(596/1770) of chromosomal abnormalities, while male embroyes acoounted for 61.02%(1080/1770),57.4%(596/1770)respectively. The proportion of female embryoes was higher than male embryoes. The median age of the patients was 30 years old(16-46 years old). As the maternal age increased, the proportion chromosomal abnormalities increased. The incidence of chromosomal abnormalities in the advanced age group (≥35 years) was 68.38%(240/351), which was significantly higher than that in the younger group (56.24% ,798/1419; χ2=17.10, P<0.01). Conclusions Embryonic chromosomal abnormalities are the most common cause of early spontaneous miscarriage. The abnormalities centralize in some karyotypes. There is certain relationship between maternal age and the incidence of miscarriage, as well as the embryonic gender. Chorionic villus cell culture and karyotype analysis are helpful in finding the cause of miscarriage and counsel the patients.

Objective To estimate the current quality of the reporting of randomized controlled trials (RCTs) related to digestive diseases in China. Methods All the papers related to RCTs published in Chinese Journal of Digestion from 1999 to 2008 were hand-searched by professional staff then evaluated and analyzed them according to the international reference standard. ResultsIn the 3298 issues of the recent ten years, there were 92 research papers of RCTs which was accounting for 2.8%. The sample size ranged from 18 to 5241. Sixty-one (66.0%) trials included the exact standard of internalize and exclusion. Sixteen (17.4%) trails told the specific method of random allocation and 22(23.9%) were double-blinded. Fifty-eight (63.0%) trials compared the baseline condition of each groups. Seventy-three(79.3%) trails showed the specific approach of statistic. In the end, only 7(5.7%) trails were identified as the strictly-designed RCTs. Conclusions The quantity and quality of the clinical RCTs can not satisfy the demand of clinical practice. Strictly-scientific designed, multicentered, large sample prospective clinical RCT should be advocated.

The fast development of the molecular biology and the further research on the nucleic acid set a solid foundation for the development of genosensor.Genosensor is the result of combining molecular biology with microelectronics,electrochemistry,optics and etc,which will build a bridge between the life science and the information science and become one of the most important technologies for DNA information analysis and detection.The working principle,classification of genosenor and the recent research on its application in the detection of functional genes of environmental microorganisms are discussed according to the latest literature.And it is pointed out that the application in the determination of microorganism functional genes in compost is an important development orientation of genosensor.

Objective To study the effects of diet and physical activity factors on blood pressure in nine provinces, using the multilevel model. Methods Data was collected in the China Health and Nutrition Survey (CHNS). A total of 6706 men and 7140 women aged above 18 who attended at least one of the surveys in the year of 1997,2000,2004 and 2006 were selected, and a two-level male and female random intercept-slope growth models were applied to estimate the relationship between the intake of daily salt, vegetable, fruit, fat, protein as well as the time spent on the moderate or heavy physical activity and blood pressure. Results After controlling for age,education, BMI, drinks and total energy intake, mean of the daily salt intake per person was positively associated with systolic blood pressure in women ( β= 0.0481, s-x= 0.0178, P＜0.01 ). Mean of the daily vegetable intake per person was negatively associated with systolic blood pressure in men and women, with the regression coefficients as -0.0063,-0.0068 respectively, indicating that if mean of the daily vegetable intake per person increased by 100 g, the systolic blood pressure would decrease by 0.6 mm Hg (1 mm Hg=0.133 kPa) or more. In addition, the daily vegetable intake was also negatively associated with diastolic blood pressure (P＜0.01). Daily fruit intake was negatively associated with systolic blood pressure both in men and women, with regression coefficients as -0.0029 and -0.0031 respectively. Time spent on the moderate or heavy physical activity was also negatively associated with systolic blood pressure in both men and women, and diastolic blood pressure in women (P＜0.05). No relationship was found between daily fat, protein intake and blood pressure. Conclusion Daily salt, vegetable, fruit intake, time spent on the moderate or heavy physical activity were associated with blood pressure in both men and women. Programs on integrated lifestyle modifications including dietary salt reduction, eating more vegetable and fruits, increasing physical activity level, plus weight control were critical for the control of high blood pressure.

OBJECTIVETo investigate the effect of basic fibroblast growth factor (bFGF) and hyaluronic acid (HA) on the proliferation of rabbit chondrocytes in vitro.

METHODSChondrocytes from the knee joints of New Zealand white rabbits were cultured. bFGF or HA or both were added into the culture medium respectively, and the proliferation of the chondrocytes was measured with MTT 3-(4, 5-dimethylthiazol-2-yl) 2, 5-diphenyl-tetra-zolium bromide. (MTT, Sigma, M2128).

RESULTSBasic fibroblast growth factor (10 ng/ml) with low concentration of fetal bovine serum in the culture medium promoted the proliferation of chondrocytes significantly, and this effect reached its maximum when concentration of bFGF reached 50 ng/ml. HA itself had no effect on the proliferation of chondrocytes. However, when bFGF was used in combination with HA, especially when the concentration of bFGF was 50-500 ng/ml and that of HA was 10-50 ng/ml, the effect on the proliferation of chondrocytes was much more than when bFGF or HA was used alone.

CONCLUSIONSbFGF can promote the proliferation of chondrocytes. HA, which has no effect on the proliferation of the cells, can maintain a normal growth of chondrocytes. When bFGF is used in combination with HA, more proliferation is obtained.

Analysis of Variance ; Animals ; Cell Division ; drug effects ; physiology ; Cells, Cultured ; Chondrocytes ; drug effects ; physiology ; Female ; Fibroblast Growth Factor 2 ; pharmacology ; Hyaluronic Acid ; pharmacology ; In Vitro Techniques ; Knee Joint ; cytology ; Male ; Probability ; Rabbits ; Sensitivity and Specificity

OBJECTIVETo explore the mechanical behavior of lumbar spine loaded by stress and provide the mechanical basis for clinical analysis and judgement of lumbar spine fracture classification, mechanical distribution and static stress.

METHODSBy means of computer simulation method, the constructed lumbar spine three-dimensional model was introduced into three-dimensional finite element analysis by software Ansys 7.0. The lumbar spine mechanical behavior in different parts of the stress loading were calculated. Impact load is 0-8000 N. The peak value was 8000 N. The loading time is 0-40 minutes. The values of the main stress, stress distribution and the lumbar spine unit displacement in the direction of main stress were analyzed.

RESULTSThe lumbar spine model was divided into a total of 121 239 nodes, 112 491 units. It could objectively reflect the true anatomy of lumbar spine and its biomechanical behavior and obtain the end-plate images under different stress. The stress distribution on the lumbar intervertebral disc (L(3)-L(4)) under the axial, lateral flexion and extension stress, and the displacement trace of the corresponding processus articularis were analyzed.

CONCLUSIONIt is helpful to analyze the stress distribution of lumbar spine and units displacement in static stress loading in the clinical research of lumbar spine injury and the distribution of internal stress.

Adult ; Biomechanical Phenomena ; Female ; Finite Element Analysis ; Humans ; Lumbar Vertebrae ; physiology ; Sacrum ; physiology ; Stress, Mechanical

Objective To explore the setting of logos on tobacco control information at outlets for retails and restaurants in 12 selected cities of China.Methods For all the shops for retail of tobacco,alcohol,food and restaurants under survey in 333 blocks of 12 cities (Beijing,Tianjin,Shanghai,Qingdao,Hangzhou,Shaoxing,Suzhou,Nantong,Zhenjiang,Chengdu,Xining and Harbin),setting and contents of logos on tobacco control information,inside and outside them were examined.Results 45 700 objectives were included in the study.Among all types of retail shops,the identification rate of tobacco control information at the entrance and inside were 3.6％ and 4.4％,with an overall identification rate as 7.0％.The overall rate at the entrance of all the restaurants was 4.6％ which was larger than the ones at the retail shops.Our result showed that there were differences between cities and types of establishments and higher rates seen in the larger ones.Of all the places that having had placement of information on tobacco control,only 18.5％ of them had put them both inside and outside.Slogans or images on "No Smoking" were the main forms of information but less than 10％ of them would show signs as ‘exclusive non-smoking'.Conclusion Data from our survey showed that the identification rate of tobacco control information was at a low level in 12 cities,and differences were seen between cities,size of establishment,that called for improvement of the existing tobacco control policies in China.

OBJECTIVETo study the durability of expanded polytetrafluoroethylene artificial heart valve (ePTFE AHV).

METHODSSix ePTFE AHVs were tested for 400 million times against accelerated fatigue using TH-2200 artificial heart valve exosomatic accelerated fatigue instrument. Hydromechanical parameters of fore-and-aft accelerated fatigue test of the 6 AHVs were obtained by TH-1200 artificial heart valve exosomatic pulsatile stream instrument.

RESULTS AND CONCLUSIONThe mean gradient pressure spanning the valve and the effective orific area of ePTFE AHVs did not undergo significant changes after fore-and-aft the fatigue test, but the regurgitation volume and regurgitation rate of ePTFE AHVs were reduced after the accelerated fatigue test, suggesting good durability of ePTFE AHV.

Biocompatible Materials ; chemistry ; Heart Valve Prosthesis ; standards ; Materials Testing ; methods ; Polytetrafluoroethylene ; chemistry ; Tensile Strength

OBJECTIVETo investigate the expression of five kinds of cyclins in hepatocellular carcinoma (HCC) and their association with degree of tumor differentiation, metastasis and infection of hepatitis B virus (HBV).

METHODSThe HCC tissue microarrays were composed of those from 273 cases of HCC tissues, 144 surrounding-tumor liver tissues and 10 normal liver tissues obtained from autopsy. The diameter of each specimens on tissue microarrays was 2.0 mm. Immunohistochemistry was used to detect the expression of cyclin A, cyclin B, cyclin D1, cyclin D3 and cyclin E on HCC tissue microarrays. The association of the expression of these cyclins with the infection rate of HBV was also analyzed.

RESULTSThree paraffin-embedded HCC tissue microarrays were successfully constructed, including 136, 143 and 148 tissue spots, respectively. The positive rates of cyclins in 273 cases of HCC were cyclin A 52.7%, cyclin B 45.4%, cyclin D1 35.9%, cyclin D3 44.3% and cyclin E 23.1%; while the figures in 144 surrounding-tumor tissues were 8.3%, 5.6%, 4.9%, 6.3% and 1.4%, respectively. In 10 normal liver tissues these cyclins exhibited negative staining, with the exception that cyclin D1 was positive in one case of normal liver tissue. The positive rate of cyclins in HCC were significant higher than those in surrounding-tumor liver tissues (P < 0.01), in HCC tissues with histological grade II and III, the cyclins expression were stronger than that in grade I (P < 0.05). The positive rates of cyclins, except cyclin A in HCC with portal vein invasion were higher than those without portal vein invasion (P < 0.01). Infection of HBV did not have significant relationship with the expression of cyclins (P > 0.05).

CONCLUSIONCyclins in different cell cycles overexpressed at varied levels in hepatocellular carcinoma, and the increased expression of cyclins may shorten the tumor cell cycle phase, accelerate cell proliferation, and have a close relationship with HCC aggressiveness.

Carcinoma, Hepatocellular ; chemistry ; Cyclin A ; analysis ; Cyclin B ; analysis ; Cyclin D1 ; analysis ; Cyclin D3 ; Cyclin E ; analysis ; Cyclins ; analysis ; Hepatitis B ; metabolism ; Humans ; Immunohistochemistry ; Liver Neoplasms ; chemistry