Gas Chromatography-Mass Spectrometry ; methods ; Humans ; Trichloroacetic Acid ; urine

This study is to investigate the effects of concentration, intestinal section, pH, paracellular route, substrate/inhibitor of enzyme (CYP3A) and proteins (P-gp, MRP2, SGL1) on the absorption of forsythoside A. The absorption of three concentrations (2.6, 5.2, and 10.4 microg x mL(-1)) of forsythoside A in different intestinal segments was studied with phenol red as the marker by rat circulation in situ. The results showed that the residue of forsythoside A with different concentrations had little significant difference from that obtained after perfusing via duodenum, jejunum, ileum and colon, which indicated that the absorption of forsythoside A was passive diffusion and had no difference in different segments of rat intestine. The residue of forsythoside A increased to 466.160 and 463.429 microg respectively when cyclosporine (4 microg x mL(-1)) or midazolam (50 micromol x L(-1)) was added to the circulation fluid, which showed significant difference compared to the control group (P < 0.05). Moreover, the residue of forsythoside A showed a tendency of increase with the increase of cyclosporine or midazolam. When digoxin (50 micromol x L(-1)) or EDTA (10 microg x mL(-1)) was added to the circulation fluid, the residue of forsythoside A decreased to 325.110 and 369.888 microg respectively, which showed significant difference as compared to the control group (P < 0.05). Besides, the residue of forsythoside A showed a tendency of reduction with the increase of digoxin or EDTA. However, there is no significant change in the absorption of forsythoside A when the different concentrations of mannitol were added to the circulation fluid. The results above indicated that the absorption of forsythoside A was mainly passive diffusion and involved paracellular route at the same time. In addition, the substrates of P-gp or CYP3A had dose-dependent effect on the absorption of forsythoside A.

Base Sequence ; DNA, Neoplasm ; genetics ; DNA-Binding Proteins ; metabolism ; Gene Rearrangement, B-Lymphocyte, Heavy Chain ; Genes, Immunoglobulin Heavy Chain ; Humans ; Immunoglobulin Heavy Chains ; genetics ; Interferon Regulatory Factors ; metabolism ; Lymphoma, Large B-Cell, Diffuse ; genetics ; metabolism ; Molecular Sequence Data ; Neprilysin ; metabolism ; Proto-Oncogene Proteins c-bcl-6

Interaction teaching model of teaching and studying exchanging,simulation scenes,and clinical scientific research training were developed in medical interns.With the helps of such teaching model,rapid progresses of studying interests,activi- ties,and abilities were found in such pediatric interns.Under grasping basic pediatrics knowledge according to teaching program, they all have multiple abilities of clinical practices,medical teaching,and scientific research to a degree.The interaction teaching model which regards student as principal part plays a very important role in the development of pediatric probation quality.

Objective To explore the correlation between acute gastrointestinal side effects caused by radiotherapy in pancreatic cancer and degree of gastroduodenal radioactive injury under gastoendoscopy.Methods From February 2010 to May 2015,112 patients with pancreatic cancer and received radiotherapy were enrolled.The correlation between gastroscopic findings and degree of gastrointestinal side effects (grade zero to five) was analyzed.The effects of different radiotherapy on the formation of radiation ulcers were also investigated.Chi-square test and Spearman correlation analysis were performed for statistically analysis.Results The incidence of radioactive gastroduodenitis was 57.1 ％ (64/112).The incidence of radiation-induced ulcer was 42.0 ％ (47/112).Among the 112 patients with pancreatic cancer and received radiotherapy,patients with over grade two nausea,vomiting,dyspepsia and constipation received symptomatic treatment.Thirty-one patients (27.7 ％) of them received appetitestimulating treatment,53 patients (47.3％) were given anti-nausea treatment,39 patients (34.8％)received therapy of promoting digestion,and 24 patients (21.4 ％) received therapy of relieving constipation.The incidence of radiation-induced ulcer in patients with grade one acute gastrointestinal side effects was 25.8 ％ (8/31),lower than that of patients with over grade two acute gastrointestinal side effects (48.1％,39/81),and the difference was statistically significant (x2 =4.595,P=0.032).The grade of acute gastrointestinal side effects was positively correlated with that of radiation-induced injury under gastroendoscopy (r=0.295,P =0.002).The incidences of radiation-induced ulcer of gamma knife radiotherapy and helical tomotherapy were 50.0 ％ (15/30) and 39.2 ％ (31/79),respectively,and the difference was not statistically significant (x2 =1.032,P =0.301).Conclusions The occurrence of radiation ulcers should be alerted if over grade two acute gastrointestinal side effects presented in patients with pancreatic cancer and received radiotherapy.The radiotherapy caused gastrointestinal side effects can not be evaluated just according to clinical symptoms.Endoscopic findings and pathological diagnosis are the gold standard.

AIM: To observe the effect of Xiaoyu Huatan Decoction on the nonalchoholic fatty liver tissue peroxisome preliferator-activated receptor?(PPAR?) expression. METHODS: The nonalchoholic fatty liver disease rat model was fed by high fat forage and the rats were divided into five groups: normal control group,model control group,high-dose of Xiaoyu Huatan Decoction group,low-dose of Xiaoyu Huatan Decoction group,Dongbao Gantai control group.Total RNA of liver was extracted,and the expression of PPAR?mRNA was analyzed by semi-quantitative RT-PCR method.We determined the contents of total cholesterol(TC),triglyceride(TG),free ratty acid(FFA) in serum and the TC,TG in liver tissue homogenate of each group,and the degree of hepatocytic steatosis. RESULTS: Expression of liver tissue PPAR? mRNA in the model group decreased significantly,lipid in blood serum and hepatic tissues increased significantly,liver fat cell greatly denaturalized.After the intervention of medicine,expression of liver tissue PPAR? mRNA of each treatment group increased significantly,lipid in blood serum and hepatic tissues decreased significantly,liver fat cell denaturation was improved. CONCLUSION: Xiaoyu Huatan Decoction can increase the expression of liver tissue PPAR?mRNA of rats,It is likely to be one of the important mechanism for treating fatty liver.

AIMTo search for flavonoids which possess stronger vasorelaxation action.

METHODSFour quercetin glycosides (1a - d) were synthesized from quercetin in three steps i. e. selective protection of quercetin, condensation with corresponding acetyiglycosyl bromide, and then removal of the protecting group; Six flavone compounds (2a - f) were prepared from phloroglucinol according to the conventional methods; The structures of synthetic compounds were confirmed by IR, 1H NMR, 13C NMR and MS. Vasorelaxation action of ten synthetic quercetin derivatives (or analogues) and four natural flavonoids compounds were examined on the isolated rat thoracic aorta rings; Comparative octanol-water partition coefficients (logP) were measured using a reversed-phase HPLC method.

RESULTSMost of the tested flavonoids showed concentration dependent relaxation effects against PE-induced contractions of rat aortic rings. These compounds had stronger action with the augment of logP values.

CONCLUSIONCompound 3-bromo-5 ,7-dihydroxyflavone (2d) was identified to have the most potent vasodilating action. These compounds exert vasodilating effects that are related to the logP values. A structure-activity relationship of flavonoids was suggested.

Animals ; Aorta, Thoracic ; drug effects ; Dose-Response Relationship, Drug ; Flavonoids ; chemical synthesis ; chemistry ; pharmacology ; Male ; Molecular Conformation ; Molecular Structure ; Quercetin ; administration & dosage ; analogs & derivatives ; chemical synthesis ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Structure-Activity Relationship ; Vasodilation ; drug effects ; Vasodilator Agents ; administration & dosage ; chemical synthesis ; pharmacology

Objective To explore the value of susceptibility-weighted imaging (SWI) for the assessment of chronic renal injury. Methods Thirty-nine patients with clinical diagnosis of chronic renal injury (RI group) who underwent routine renal MRI and SWI examination were retrospectively analyzed. They were divided into mild injured group (15 cases) and moderate to severe injured group (24 cases) by estimated glomerular filtration rate (eGFR). At the same time, 17 volunteers without chronic renal injury who had normal serum creatinine (Scr) and blood urea nitrogen were recruited as control group. All subjects underwent routine renal MRI and SWI examination. The ratios of cortex to medulla were measured and calculated in both kidneys' magnitude image and susceptibility weighted image, which were indicated as C/MMAG and C/MSWI. Independent sample t test was used to compare the differences of C/MMAG and C/MSWI between control group and RI group, and paired sample t test was used to compare the differences betweenC/MMAG and C/MSWI in each group. One-way ANOVA was used to compare the difference of C/MMAG and C/MSWI between the control group and the different RI groups. ROC was employed to assess the diagnostic efficacy of C/MMAG and C/MSWI in renal injury. Pearson linear correlation analysis was used to evaluate the correlation between C/MMAG, C/MSWI and eGFR, Scr in patients with renal injury. Results The C/MMAG and C/MSWI in the RI group were 1.101±0.039 and 1.071±0.046, respectively. C/MSWI was obviously lower than C/MMAG, and the difference was statistically significant (t=5.056, P<0.01). There was no significant difference between C/MMAG and C/MSWI in the control group (P>0.05). The C/MMAG and C/MSWI in the RI group were obviously lower than those in the control group, and the difference was statistically significant (t=4.564, 6.122;P<0.01).The C/MMAG and C/MSWI in the mild injured group and the moderate to severe injured group were significantly lower than those in the control group, the difference was statistically significant (P<0.05). While the differences of those between mild injured group and moderate to severe injured group showed no statistical significance (P>0.05). The area under ROC of C/MMAG and C/MSWI in diagnosis of renal injury were 0.853 and 0.952, respectively. C/MMAG was positively correlated with eGFR (r=0.460,P<0.01). Conclusions Susceptibility-weighted imaging can be used to assess chronic renal injury. Although it cannot reflect the degree of renal function damage, it has some value in the early diagnosis of mild renal injury.

Objective: To establish a prediction model for high-risk cardiovascular disease (CVD) among residents aged 35 to 75 years, so as to provide the basis for improving CVD prevention and control measures. Methods: Permanent residents aged 35 to 75 years were selected from Dongcheng District, Beijing Municipality using the stratified random sampling method from 2018 to 2023. Demographic information, lifestyle, waist circumference and blood biochemical indicators were collected through questionnaire surveys, physical examinations and laboratory tests. Influencing factors for high-risk CVD among residents aged 35 to 75 years were identified using a multivariable logistic regression model, and a prediction model for high-risk CVD was established. The predictive effect was evaluated using the receiver operating characteristic (ROC) curve. Results: A total of 6 968 individuals were surveyed, including 2 821 males (40.49%) and 4 147 females (59.51%), and had a mean age of (59.92±9.33) years. There were 1 155 high-risk CVD population, with a detection rate of 16.58%. Multivariable logistic regression analysis showed that gender, age, smoking, central obesity, systolic blood pressure, fasting blood glucose, triglyceride and low-density lipoprotein cholesterol were influencing factors for high-risk CVD among residents aged 35 to 75 years (all P<0.05). The area under the ROC curve of the established prediction model was 0.849 (95%CI: 0.834-0.863), with a sensitivity of 0.693 and a specificity of 0.863, indicating good discrimination. Conclusion The model constructed by eight factors including demographic characteristics, lifestyle and blood biochemical indicators has good predictive value for high-risk CVD among residents aged 35 to 75 years.

OBJECTIVETo explore the indication and the procedure of reoperation in patients with locally recurrent rectal cancer.

METHODSClinical data of 35 patients with locally recurrent rectal cancer from January 1998 to December 2002 undergone reoperation were analyzed retrospectively.

RESULTSAmong the 35 cases, 19 underwent radical resection, 11 palliative resection and 5 colostomy(or laparotomy). The 5-year survival rates of the radical, palliative and colostomy(or laparotomy) were 35.3%, 18.2% and 0 respectively. Median survival time was 45, 22 and 9 months respectively.

CONCLUSIONOptimal reoperation for the patients with locally recurrent rectal cancer can improve the survival rate and quality of life effectively.

Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; surgery ; Neoplasm Staging ; Postoperative Period ; Rectal Neoplasms ; pathology ; Reoperation ; Retrospective Studies ; Treatment Outcome