Objective In order to investigate the relationship among reflux esophagitis,Barrett's e- sophagus and esophageal adenocarcinomas,the expressions of Cdx2 and MUC2 gene were studied.Methods Using immunohistochemistry,the expressions of the Cdx2 and MUC2 were detected in the esophageal mu- cosa of 30 patients with reflux esophagitis,18 patients with Barrett's esophagus and 25 patients with esopha- geal adenocareinoma.Results The positive rate and staining intensity of Cdx2 and MUC2 expressions in re- flux esophagitis,Barrett's esophagus and esophageal adenocarcinoma were significantly higher than those in normal esophageal mucosa(P

The content of ATP, ADP, AMP, sodium phosphate and sodium pyrophosphate were determined by 31P NMR, the linear range of ATP, ADP and AMP were found to be 0.004-0.080 mol x L(-1), sodium phosphate and sodium pyrophosphate were 0.005-0.100 mol x L(-1). The RSD were 0.40%-1.30%, the recovery were 96.9% - 105.2%. The method has been applied to the determination of ATP injection. The impurities of ATP injection were ADP and sodium phosphate. The content of ATP is in line with the requirement of the pharmacopoeia. The results indicated that the method is of good reproducibility, high accuracy, rapid and simple operation, without pretreatment and interference of other elements, 31P NMR is a new and reliable method of analyzing ATP, ADP, AMP and phosphate.
Adenosine Diphosphate ; analysis ; Adenosine Monophosphate ; analysis ; Adenosine Triphosphate ; analysis ; Chemistry, Pharmaceutical ; methods ; Diphosphates ; analysis ; Magnetic Resonance Spectroscopy ; Perfusion ; Pharmaceutical Preparations ; analysis ; Phosphates ; analysis ; Quality Control ; Reproducibility of Results

Animals ; Oocytes ; metabolism ; physiology ; Receptors, G-Protein-Coupled ; physiology ; Receptors, Purinergic P2X ; physiology ; Xenopus laevis

Adult ; Aged ; China ; epidemiology ; Female ; Humans ; Male ; Middle Aged ; Pneumoconiosis ; epidemiology

Objective To study the effects of H_2S on the visceral pain induced by colorectal dis- tention (CRD) and the expression of substance P (SP)in rats.Methods Forty Wistar rats were randomly divided into control group,normal saline(i,p.) group,low( 15?mol/kg),moderate (45?mol/kg) and high(75?mol/kg) dose of NaSH(i.p.) groups.All rats.except control group,were subjected to CRD for 25 seconds and their behavioral responses to CRD were assessed by measuring the abdominal with drawal reflex(AWR).The expression of SP in the ileocecal junction,colon,spinal cord of thoracic waist (T6-L5) and brain was detected by immunohistochemistry.Results The visceral pain induced by CRD produced a capacity-dependent increase of AWR score in normal saline group,and a dose-dependent reduction of AWR score in three of NaSH groups.There was no significant differences of SP expression in the ileocecal junction,colon,spinal cord of thoracic waist and thalamencepbalon between the normal saline group and the NaSH low dose group.However,the decreased SP expression in the NaSH moder- ate and high dose groups were observed in comparison to those in the normal saline group(P

Flavonoids baicalin is the main bioactive component extracted from Scutellaria baicalensis Georgi. Baicalin has high medicinal value and shows extensive pharmacological effects including antitumor, antibiosis, anti-inflammatory, antioxidation, neuro-protection, and significant potential in tumor treatment. Recent studies have shown that baicalin suppresses the growth of many kinds of human cancer. The underlying mechanisms include induction of apoptosis, induction of cell cycle arrest, inhibition of tumor metastasis, suppression of angiogenesis, and so on. This article reviewed the research progress of baicalin on its antitumor pharmacology and possible mechanisms at home and abroad, and provided the basis for its further research.

Objective:To evaluate the reliability and validity of the Chinese version of Pittsburgh sleep quality index (PSQI)among the medical students.Methods:A total of 603 undergraduate students were selected from a medical school in Beijing using a stratified-cluster random-sampling strategy,who were assessed by using the Chinese version of PSQI.Then 1 71 subjects were randomly selected to retest about 1 month later,using a variety of psychometric properties to evaluate reliability and validity of the scale. Results:The average of global PSQI scores was 5.38 ±2.34,the overall Cronbach’s αcoefficient of all the scale items was 0.734,the half-split reliability coefficient was 0.655;the test-retest correlation coef-ficient was 0.530 for global PSQI score,and there was no statistically significant difference before and af-ter (P >0.05).As for the construct validity,confirmatory factor analysis results indicated that the two factor model (containing sleep efficiency factor and sleep quality factor)was the optimal model (good-ness-of-fit index 0.949,root of the mean square residual 0.083,comparative fit index 0.699),and the factor loading for “hypnotic drug use”was the lowest.Using subjective sleep quality of the students as the criteria,the global PSQI score was statistically different between the criteria-based groups (P <0.001 ).And the area under the receiver operating characteristics (ROC)curve which was plotted using the global score of PSQI was 0.908 (95%CI:0.880 -0.936).Conclusion:The Chinese version of PSQI has been verified,having good reliability and validity among the medical students,and is an effec-tive tool to investigate and screen the sleep quality of medical students in China.

OBJECTIVETo explore the intergrating of N-isopropyl oxamate and serum protein and establish a high performance liquid chromatography (HPLC) detection method of N-isopropyl oxamate (specific inhibitor of testis-specific lactate dehydrogenase (LDH-C4)) in the blood of plateau pikas.

METHODSTwenty highland pika 150-200 g, were randomly divided into two groups (n = 10): control group and inhibitor group. Different concentrations of N-isopropyl oxamate were added to examine the intergrating of N-isopropyl oxamate and serum protein. In order to determine its concentration in the pika blood accurately, we used the method of adding trypsin to incubate the serum first, followed by trichloroacetic acid treatment and detecting by HPLC. Results: When the concentrations of N-isopropyl oxamate in the pika serum were added to 0.05 mmol/L, 0.1 mmol/L, 1 mmol/L, 10 mmol/L, 16.7 mmol/L, 33.3 mmol/L and 100 mmol/L, the intergrating rates between N-isopropyl oxamate and plateau pika serum were 100%, 100%, 100%, 86.84%, 54.11%, 40.10% and 20.18%, respectively. The method established in this paper was good on recovery rates, precision and stability. A good linearity was obtained in the range of 0.0125-0.25 mmol/L. When the concentrations of N-isopropyl oxamate in the serum were added to 0. 15 mmol/L,0.3 mmol/L and 1 mmol/L, the recovery rates were 98.05%, 98.98% and 98.12%, respectively; the precision relative standard deviation( RSD) of concentrations were 1.17%, 0.92% and 0.83%, respectively; the stability relative standard deviation (RSD) of concentrations were 1.38%, 1.40% and 0.88%, respectively. The repeatability RSD of the method was 1.76%. Quantitative limit was 0.0125 mmol/L.

CONCLUSIONN-isopropyl oxamate has a strong affinity with plateau pika serum protein that can't be accurately determined with common HIPLC method. It can be accurately determined in the blood by adding trypsinto digest the serum protein first, followed by adding trichloroacetic acid to precipitate the protein.

Objective To investigate the protective effects of electroacupuncture on the endothelial tissues of microvessels in the basal ganglia in the rats with cerebral ischemia-reperfusion.Methods The MCAO model was established by using Longa's method.The immunohistochemistry SABC(strepto-avidin-biotin-peroxidase complex) method was employed to detect the expression of ICAM-1,P-selectin in the microvessel of rats'ipsilateral basal gan- glia.Results The number of positive ICAM-1 and P-selectin endothelial cells of model group were significantly in- creased,as compared to normal group and sham operated group(P

Objective To investigate the iodine nutrition level of the vulnerable population in the high risk region of iodine deficiency disorders for providing a scientific basis for the development of effective preventive measures in Qinghai province. Methods The non-iodized salt coverage rate ＞ 5％ of Delingha city, the coverage rate of iodized salt and the rate of qualified iodized salt ≤80％ of Jiuzhi, Wulan, Nangqian, Zaduo, Geermu,Yushu, Gande, Chengduo, and Dulan counties(cities), the median of urinary iodine ＜ 100 μg/L of Huangyuan county of 11 areas were chosen as monitoring area in 2009. Five townships(towns) were selected by their location of east, west, south, north and center in each county (city), and one school was selected in each township (town),and 60 household salt samples were collected in each school, and quantitatively determined by direct titration of iodine(GB/T 13025.7-1999). Three townships(towns) were selected in each county(city), and two schools were selected in each township(town). The content of urinary iodine of 40 children aged 8 - 10 and 20 women of childbearing age aged 18 - 40 was analyzed by As3+-Ce4+ catalytic spectrophotometry (WS/T 107-2006). ResultsThree thousand two hundred and sixty-one edible salt samples were tested. The coverage rate of iodized salt was 79.88％.The iodized salt qualification rate was 95.16％. The qualified iodized salt consumption rate was 76.02％. The noniodized salt coverage rate was 20.12％. In Nangqian, Zaduo, Yushu and Geermu counties(cities), the non-iodized salt coverage rate was 88.89％, 45.05％, 43.00％ and 12.67％, respectively. The median of urine iodine of 2536 children aged 8 - 10 was 155.8 μg/L, with ≤50 μg/L about 13.6％ (346/2536), ＞ 100 μg/L about 67.5％(1711/2536), and it was 75.1, 94.6 μg/L in Nangqian and Zaduo counties, respectively. The median of urine iodine of 665 women of childbearing age was 129.7 μg/L, with ≤50 μg/L about 22.7％(151/665), ＞ 100 μg/L about 59.2％(394/665), and it was 21.0, 54.7, 72.7 μg/L in Zaduo, Nangqian and Chengduo counties, respectively.Conclusions Insufficient intake of iodine exits in children and women of childbearing age in high risk region of iodine deficiency disorders in Qinghai province, which should be corrected as soon as possible.