Objective To explore the relationship between the expression of matrix metalloproteinase (MMP) and tissue inhibitor of metalloproteinase (TIMP) in gestational trophoblastie diseases and its invasiveness.Methods The expression and distribution of MMP-7,MMP-9,TIMP-1 and TIMP-2 were determined by immunohistochemistry PV-6000 in 49 cases of hydatidiform mole (eight of them with malignant transformation),six cases of invasive hydatidiform mole,two cases of choriocarcinoma and 18 cases with normal villi in early pregnancy.Results The expression of MMP-7,MMP-9,TIMP-2 and MMP- 9/TIMP-1 was significantly higher in choriocareinoma,invasive mole and malignant transformed mole than that in normal villi in early pregnancy and non-malignant transformed mole (F=10.950,7.760,7.304, 3.442;P

Background and purpose: miR-210 was closely related to the occurrence and development of gastric cancer, but its mechanism and clinical significance were still not clear. The purpose of this study was to explore the expression of miR-210 in gastric cancer tissues and its clinical significance. Methods: The expression of miR-210 was detected in gastric cancer tissues and the corresponding adjacent tissues. The relationship between the expression of miR-210 and clinical pathological factors and prognosis was analyzed. Results: Real-time fluorescent quantitative polymerase chain reaction (RTFQ-PCR) showed that the expression of miR-210 in gastric cancer was higher than that in adjacent tissues, and there was a significant difference between the two groups (P<0.05). The expression of miR-210 was closely related to tumor size, lymph node metastasis and TNM stage, but was not related to age, gender, tumor dif-ferentiation and depth of invasion. The 5-year survival rate of patients with low miR-210 expression was 48.2%, where-as the 5-year survival rate of patients with high miR-210 expression was 30.4% (χ2=4.216, P=0.040). Conclusion: The expression of miR-210 in gastric cancer was higher than that in adjacent tissues, and maybe related to the development and prognosis of gastric cancer. miR-210 is expected to be a new diagnostic marker and therapeutic target for gastric cancer.

Rotavirus capsid protein Vp4 plays an important role in the virus adhering and entering the cells. In this study, a Vp4 gene cloned from a rotavirus strain TB-Chen was highly expressed in E.coli BL21 (DE3). The results of the Western blot showed that the protein possesses specific immuno-reactivities and can be specifically recognized by guinea pig antibodies against rotavirus strain SA11 or Wa. Some Vp4 dimers were formed during renaturation. These data obtained from this study provide a strong basis for further study on the structure and function of the Vp4.

Objective To explore the level of patient safety culture of nurses, so as to provide more objective information for the developmental measures to improve patient safety culture. Methods 1 866 nurses from six grade-3 hospitals of a province were investigated by patient safety culture assessment scale. Results The total scores of patient safety culture of nurses was 3.57 ± 0.42, belongs to the middle-level. 5 factors in descending order according to the questionnaire scores was teamwork climate, safety climate, job Satisfaction,perception of management and stress recognition. The lower scores were the punishment of adverse events, job stress, work intensity, the staffing and so on. Conclusions It is very important that nurse managers should focus on improving a safer system in nursing, find out the potential risks, create a positive patient safety culture,and reduce or prevent adverse events of nursing in order to promote patient safety.

A novel drug delivery system combining oral fast dissolving film with sodium deoxycholate/phospholipid mixed micelles was prepared to increase the absorption of cucurbitacin B that is a poor aqueous solubility substance. Encapsulation efficiency, particle size, zeta potential, polydispersity coefficient, investigated the morphology, disintegration time of oral fast dissolving film and the pharmacodynamic properties of cucurbitacin B sodium deoxycholate/phospholipid-mixed micelles before and after solidified in mice were evaluated and compared. The oral fast dissolving film prepared in this study showed a homogeneous pale yellow and could completely disintegrated in the 30 s. It could meet the requirements of rapidly disintegrating fully. The encapsulation efficiency, particle size, zeta potential, polydispersity coefficient of cucurbitacin B sodium deoxycholate/phospholipid-mixed micelles loaded in oral fast dissolving film were (43.36 +/- 2.12)%, (108.82 +/- 5.2) nm, (-34.18 +/- 1.07) mV, 0.088 +/- 0.012, respectively. The encapsulation efficiency, particle size, zeta potential, polydispersity coefficient of cucurbitacin B sodium deoxycholate/phospholipid-mixed micelles in solution were (41.26 +/- 2.22)%, (181.82 +/- 4.48) nm, (-30.67 +/- 0.81) mV, 0.092 +/- 0.012, respectively. The difference of pharmacodynamics among film of cucurbitacin B-loaded micelles, cucurbitacin B-loaded micelles and free cucurbitacin B in vivo was compared. Solubility of cucurbitacin B loaded in sodium deoxycholate/phospholipid-mixed micelles has also been greatly improved. The tumor inhibition rate of cucurbitacin B loaded in sodium deoxycholate/phospholipid-mixed micelles was significantly improved and did not change significantly before and after solidified. These showed that the sodium deoxycholate/phospholipid-mixed micelles could enhance the antitumor activities of cucurbitacin B and the stability of cucurbitacin B sodium deoxycholate/phospholipid-mixed micelles was improved significantly after solidified by oral fast dissolving film technology without pharmacodynamic properties changed significantly.
Animals ; Antineoplastic Agents ; administration & dosage ; chemistry ; Cell Line, Tumor ; Deoxycholic Acid ; chemistry ; Drug Carriers ; chemistry ; Humans ; Male ; Mice ; Neoplasms ; drug therapy ; Phospholipids ; chemistry ; Solubility ; Triterpenes ; administration & dosage ; chemistry

ObjectiveTo evaluate the prevalence of occult hepatitis B infection in blood donors and to explain the possible molecular mechanfism of occult hepatitis B infection.Methods Enzyme linked immunosorbent assay (ELISA) method was used for detection of hepatitis B virus (HBV)markers in serum samples of 594 donors which were collected from blood bank with HBsAg negative results.Nested-polymerase chain reaction (PCR) was performed to detect serum HBV DNA.In donors with occult HBV infection,the serum HBV markers were quantitatively detected by Abbott nested-PCR kit.The PCR products of S region were sequenced and sequence alignment was performed to analyze relevant virus mutations.Eleven HBsAg positive patients were randomly recruited as positive controls and S region was amplified and sequenced.The difference of S region sequences was compared between patients with occult HBV infection and HBsAg positive HBV infection.ResultsAmong 594 HBsAg negative donors,15 were diagnosed with occult HBV infection with the incidence of 2.5 ％.No correlation was found between results of serum HBV markers and occult HBV infection.Sequencing results of HBV S region were obtained from 10 cases,which revealed mutations of HBV.The amino acid mutations in the “a” determinant cluster were found in three patients,which were I126T,T140I and T140I,respectively.On the contrast,mutation in the “a” determinant cluster of T131 N was only found in one positive control.ConclusionsThe occult HBV infection exists in blood donors with negative results for HBsAg test.Genetic mutation may play a role in the occult HBV infection.

The selective side-chain cleavage of phytosterol to 4-androstene-3,17-dione(4-AD)and 1,4-androstadiene-3,17-dione(ADD)by Mycobacterium sp.was described.Because of the similarity in chemical structure between 4-AD and ADD,it is difficult to separate them from the fermentation broth.So far,it has been verified that the ADD can be produced by dehydrogenation of 4-AD.In this reaction,3-Ketosteriod-1-Dehydrogenase(ksdD)plays an important role.The gene knocking out method was used to solve the problem.Partial sequence of ksdD was obtained by PCR which was 631bp in length.Then,a targeting vector pUC19-MK was constructed,which was electroporate into the original strain Mycobacterium neoauru.The method of homologous recombination was used to knock out ksdD gene located in the chromosome of Mycobacterium neoauru.In this way,ksdD would lose its enzyme activity.In the result,5 transformants were screened.The experiments of steroid transformation by the transformants were carried out.The productivity of 4-AD reached 17.52% after 144h,which is 192% higher than the original strain.Meanwhile,the productivity of ADD reached 6.12%,which is 89.9% lower than the original strain.

OBJECTIVETo study absorption kinetics of scopoletin in rat stomachs and intestines.

METHODRats was cannulated for in situ recirculation. UV and HPLC methods were used to determine the concentrations of phenolsulfonphthalein and scopoletin, respectively.

RESULTThe absorption rates in rat stomachs at 2 h after administration was 76.31%; The absorption rates at colon, duodenum, ileum and jejunum were 46.25%, 40.54%, 38.21%, 32.77%, respectively. The absorption rate constant (Ka) at concentrations of 10.0144, 20.0288-40.0576 mg x L(-1) in intestine were 0.6434, 0.6137, 0.5970 h(-1), respectively. The Ka of scopoletin at pH of 6.0, 6.8 and 7.4 in intestine were 0.6217, 0.6033, 0.6137 h(-1), respectively.

CONCLUSIONThe concentrations and pH values of scopoletin solution had no distinctive effect on the absorption kinetics. The absorption of scopoletin was a first-order process with passive diffusion mechanism. Scopoletin was well absorbed at stomachs and intestines in rats. Colon was the best absorption site of scopoletin, which suggest that a sustained-release preparation should be suitable for this compound.

Absorption ; Animals ; Chromatography, High Pressure Liquid ; Female ; Hydrogen-Ion Concentration ; Intestinal Absorption ; Intestines ; metabolism ; Male ; Rats ; Rats, Sprague-Dawley ; Scopoletin ; pharmacokinetics ; Spectrophotometry, Ultraviolet ; Stomach ; metabolism

A bacterial strain which could grow well on the substrate of PAEs as the sole source of carbon and energy was isolated from contaminated sludge in the river of WeiFang in ShangDong province and it was designated as JDC-3. Based on the morphology,biophysical and biochemical properties as well as molecular characteristics,this isolate was preliminarily identified as Delftia sp.. A fragment of phthalate dioxygenase gene was successfully amplified from the genus of Delftia for the first time using a set of degenerate primers. Meanwhile,the degradation capability of JDC-3 was determined by HPLC using DMP as test substrate. The results showed that the optimal pH and temperature were at 7.0～8.0 and 30?C～35?C respectively. The degradation kinetics of JDC-3 was studied in different initial DMP concentration under optimal conditions. The results indicated that the degradation dynamic equation was ln C =-0.06837 t + A when DMP concentration was lower than 300 mg/L,with half life of 12.48 h. The degradation rate decreased and half life of JDC-3 prolonged as the initial concentration kept on increasing.

Phytoestrogens are bioactive substances existing in natural plants. They have similar molecular structure to those of estrogens. In this article we introduced their classification and sources, and elucidated their effects on heart from aspects involving cardiac function and myocardial electrophysiology. By regulating serum lipid metabolism, arterial vessels, cytokine levels, and coagulation/fibrinolysis system, phytoestrogens possess the effects of anti-atherosclerosis and may be used to prevent and treat cardiovascular diseases.
Arteriosclerosis ; prevention & control ; Cardiovascular Diseases ; prevention & control ; Humans ; Hyperlipidemias ; prevention & control ; Isoflavones ; pharmacology ; Phytoestrogens ; pharmacology ; Phytotherapy