Objective:To study the effects of early dietary compositions on body weight, body fat content, free thyroid hormoneT4(FT4)and carnitine palmityl transferase-Ⅰ(CPT-Ⅰ) gene expression in rats. Method:Male Wistar rats weaned on 24 d were randomly divided into A, B,C,D groups and were fed carbohydrate (basic), high protein, high unsaturated fatty acid and high saturated fatty acid diet respectively. After 3w, all rats were assigned to basic diet for 2w, and then rats from A group were randomly divided into groups A1 and A2. A1 was fed on basic diet continuously. Groups A2 ,B,C,D were assigned to high-fat diet for 6w. Body weight, body fat, blood glucose and FT4 ,and CPT-ⅠmRNA were observed in eight rats of every group. Results:Body weight, body fat and FT4 level in C group were significantly lower than those in A2 on 11w(P

Objective To study the differences between diet induced obesity (DIO) and diet induced obesity resistance (DIO-R) during insulin resistance (IR) in rats. Method Male SD rats were fed by high-fat diet 1 (45 % fat kJ) after adaptation. At 3rd week, rats were divided into 3 groups according to their body weight: rats belonging to the middle 1/3 of their body weights were the control group, and was fed by control diet (10 % fat kJ). The heaviest 1/3 and the lightest 1/3 belong to DIO and DIO-R group, respectively, and were fed by high-fat diet 2 (60 % fat kJ). Five rats were selected randomly from each group and sacarified at 3rd, 6th, 8th, 10th and 11th week. The energy intake, body fat contents, fasting blood glucose (FBG), serum lipid, serum insulin, insulin sensitive index(ISI)and leptin of rats were monitored dynamically. Results DIO rats were significantly different from DIO-R and control rats in energy intake, body fat content, FBG, lipid, serum insulin and leptin. Conclusion Fed by the same high-fat diet, DIO rats are more sensitive than DIO-R rats to become IR.

Objective: To examine the effect of conjugated linoleic acid (CLA) on lipid metabolism and genes expression of fatty acid transport protein(FATP)and acyl-CoA synthase(ACS) in white adipose tissue of rats. Method: Male Wistar rats were randomly divided into control group, high-fat group and high fat +CLA group (0.75,1.50,3.00 g/100g bw). By reverse transcription polymerse chain reaction (RT-PCR) technique the expression levels of FATP, ACS and peroxisome proliferator-activated receptor-?(PPAR?) mRNA were detected. Results: Serum FFA,insulin and glucose levels of rats fed with high fat diet were higher than those of control group. Supplement of CLA can decrease serum FFA, insulin and glucose levels of obese rats, and increase expression of FATP,ACS and PPAR?mRNA in adipose tissue of obese rats. Conclusion: CLA can improve insulin resistance of obese rat and increase expression of FATP,ACS mRNA, possibly acting through activating PPAR?.

To cultivate medical postgraduates with scientific research quality is an important task of medical education. It is of significance for excellent medical postgraduates. Cultivation of scientific research quality in scientific research thinking training,scientific research items selection and implementation was expounded in the paper to provide suggestions for better medical postgraduate education.

The teaching reform in college is calling for changes in students' learning styles and teachers' teaching methods.It is very important to change teacher' s educational concept and transform teacher' s role in the teaching process in order to completely change the form and content of nutrition and food hygiene course.It means we should only change traditional teaching approaches into problem based learning or inquiry teaching but also summarize the teaching content and integrate the theory with practice.

Objective To evaluate the effect of edaravone on myocardial injury in patients undergoing offpump coronary artery bypass grafting (OPCABG).Methods Forty ASA physical status Ⅲ-Ⅳ patients,aged 45-64 yr,weighing 55-95 kg,with NYHA class Ⅱ-Ⅲ,scheduled for elective OPCABG,were randomly divided into 2 groups (n =20):edaravone group (group E) and control group (group C).After induction of anesthesia,edaravone 60 mg (in 100 ml of normal saline) was infused over 30 min in group E,while the equal volume of normal saline was given instead of edaravone in group C.Venous blood samples were taken before operation (T1),after skin incision (T2),at the end of operation (T3),and at 24 h after operation (T4) to measure the serum levels of myocardial enzymes and cardiac troponin Ⅰ (cTnI).The time for ventilator treatment,duration of stay in the intensive care unit and duration of stay in hospital were recorded.Results Compared with group C,the activities of serum creatine kinase,creatine kinase isoenzyme-MB,aspartate aminotransferase and lactate dehydrogenase and cTnI concentrations were significantly increased at T3 and T4 (P ＜ 0.05) and no significant changes were found at T1 in group E (P ＞ 0.05).The parameters mentioned above were significantly higher at T3 and T4 than at T1 in the two groups (P ＜ 0.05).The time for ventilator treatment,duration of stay in the intensive care unit and duration of stay in hospital were significantly shortened in group E as compared with group C (P ＜ 0.05 or 0.01).Conclusion Edaravone 60 mg infused before OPCABG can provide effective myocardial protection in patients.

The human gastro-intestinal tract is not only the habitat of gut microbiota, but also the main place that the body gets available nutrients. Therefore, the gut microbiota of human can be inseparable associated with the human nutrition. The common technologies used among gut microbiota research included metageonomic, metatranscriptomics, metaproteomics, and metabolomics. The research of gut microbiota based on above omics methods confirmed that diets were the main factors influencing the composition and expression of gut microbiota. The proportion, quantity, stable state, and metabolic changes of gut microbiota were closely related to obesity, diabetes mellitus, cardiovascular disease, and other nutritional-related diseases. Reasonable dietary intervention can adjust the disorders of gut microbiota, which can achieve prevention and treatment of obesity, diabetes, cardiovascular diseases, and other nutritional-related diseases. Although the single omics methods can be used to study the problems of some aspects of gut microbiota, the combination of multi-omics is needed to achieve the above objectives.

Objective To investigate the short- and long-term complications after endoscopic Oddi's sphincterotomy (EST) upon endoscopic retrograde cholangiopancreatography (ERCP) procedure and determine whether the size of EST correlates to the occurrence of EST complications.Methods 95 cases receiving EST in the process of ERCP in our hospital were studied and followed up. The patients were divided into large, moderate and small incision groups according to the size of EST and the states of short-term and long-term EST complications were statistically analyzed.Results The incidence of short-term complications of EST was 18. 94% (18/95). They included bleeding in the process of ERCP in 11 cases, delayed bleeding in 3, acute pancreatitis in 1, acute cholangitis in 2 and duodenal perforation in 1. All these patients but 1 with duodenal perforation were discharged after undergoing symptomatic treatments. Eleven out of the 95 patients had long-term complications (11.57 % ). These included biliary system infection in 5 cases, recurrent calculus of bile duct in 3, papilla stricture in 1 and chronic relapsing pancreatitis in 2. All 11 patients recovered after therapeutic ERCP again or symptomatic drug treatments. There was no significant difference in incidence of short-term (χ2 =2.433, P=0.296) or long-term complications (χ2 = 1.151, P=0.562) among the 3 groups. Furthermore, there was no statistical correlation between the incision size of Oddi and complications including operative bleeding (P=0.109), short-term complications (P=0.124) and longterm complications(P=0.402). Conclusion There are many short-term and long-term complications after EST, but there is no correlation between the complications and the incision size of Oddi. The occurring rate of complications might be reduced through accurate direction of papilla incision, avoidance from injury of blood vessel, keeping bile drainage unobstructed and protection of the function of Oddi sphincter as far as possible in the process of ERCP.

Objective:To investigate the application value of preoperative clinical and magnetic resonance imaging (MRI) targetoid enhancement combined with alpha-fetoprotein in evaluating the expression of cytokeratin 19 (CK19) in patients undergoing radical resection for single hepatocellular carcinoma (HCC) without macrovascular invasion.Methods:The retrospective cohort study was conducted. The clinicopathological data of 220 patients who underwent radical resection for single HCC without macrovascular invasion in the General Hospital of Ningxia Medical University from January 2016 to December 2020 were collected. There were 171 males and 49 females, aged (56±11)years. Of the 220 patients, 52 cases showed positive CK19 expression, while 168 cases showed negative CK19 expression. Observation indicators: (1) MRI and immunohistochemical staining results of patients with different status of CK19 expression; (2) comparison of clinical features of patients with different status of CK19 expression; (3) comparison of MRI features in patients with different status of CK19 expression; (4) analysis of influencing factors for CK19 expression in patients and predictive value. The normality of continuous variables was tested using the Shapiro-Wilk test. Measurement data with normal distribution were expressed as Mean± SD, and comparison between groups was conducted using the t test. Measurement data with skewed distribution were expressed as M( Q1, Q3), and comparison between groups was conducted using the Mann-Whitney U test. Count data were expressed as absolute numbers and (or) percentages, and comparison between groups was conducted using the chi-square test. Comparison of ordinal data was analyzed by the non-parameter rank sum test. The relevant clinical and imaging features with P<0.05 were included in the binary Logistic regression model. The receiver operating characteristic (ROC) curve was drawn and the area under curve (AUC) was used to evaluate the predictive efficiency of the model. Results:(1) MRI and immunohistochemical staining results of patients with different status of CK19 expre-ssion. Results of MRI examination in patients with positive CK19 expression showed the tumors with low-signal intensity on plain T1-weighted imaging, annular high enhancement in the arterial phase, clear boundaries in the portal venous phase, central enhance-ment in the delayed phase and targetoid high signals on diffusion-weighted imaging (DWI). Immuno-histochemical staining revealed a positive CK19 expression. Results of MRI examination in patients with negative CK19 expression showed the tumors with low-signal intensity on plain T1-weighted imaging, non-annular high enhancement in the arterial phase, unclear boundaries in the portal venous phase, low signals compared with peripheral liver tissue in the delayed phase and uniform high signals on DWI. Immunohistochemical staining revealed a negative CK19 expression. (2) Clinical features of patients with different status of CK19 expression. The neutrophil count and cases with alpha-fetoprotein (AFP) ≥400 μg/L were 3.07(2.21,4.41)×10 9/L and 26 in patients with positive CK19 expression, versus 2.72(2.05, 3.51)×10 9/L and 48 in patients with negative CK19 expression, showing significant differences between them ( Z=?2.06, χ2=8.17, P<0.05). (3) Compari-son of MRI features in patients with different status of CK19 expression. Cases with tumor diameter ≥ 5 cm and cases with tumor showing targetoid enhancement were 34 and 22 in patients with positive CK19 expression, versus 82 and 24 in patients with negative CK19 expression, showing significant differences between them ( χ2=4.38, 18.86, P<0.05). (4) Analysis of influencing factors for CK19 expression in patients and predictive value. Results of multivariate analysis showed that AFP ≥ 400 μg/L and targetoid enhance-ment were independent risk factors for positive CK19 expression in HCC patients [ odds ratio=2.09, 3.23, 95% confidence interval ( CI) as 1.06?4.13, 1.49?6.99, P<0.05]. Results of ROC curve analysis showed that the AUC of targetoid enhancement for predicting positive CK19 expression was 0.64 (95% CI as 0.57?0.71), with the sensitivity and specificity as 42.31% and 85.71%. The AUC of AFP ≥400 μg/L for predicting positive CK19 expression was 0.61 (95% CI as 0.53?0.68), with the sensitivity and specificity as 51.00% and 71.43%. The AUC of targetoid enhancement combined with AFP ≥400 μg/L for predicting positive CK19 expression was 0.69 (95% CI as 0.61?0.77), with the sensitivity and specificity as 67.31% and 63.10%, respectively. Conclusions:Targetoid enhancement and AFP ≥400 μg/L are independent risk factors for positive CK19 expression in patients with single HCC without macrovascular invasion. Their combination has clinical value for preoperative evaluation of CK19 expression.

BACKGROUND/OBJECTIVES: There has been an increased interest in determining calcium magnesium, sodium, and potassium's distinct effects on hypertension over the past decade, yet they simultaneously regulate blood pressure. We aimed at examining the association of dietary calcium, magnesium, sodium, and potassium independently and jointly with hypertension using National Health and Nutrition Examination Survey data from 2007 to 2014.MATERIALS/METHODS: The associations were examined on a large cross-sectional study involving 16684 US adults aged>20 years, using multivariate analyses with logistical models. RESULTS: Sodium and calcium quartiles assessed alone were not associated with hypertension. Potassium was negatively associated with hypertension in the highest quartile, 0.64 (95% confidence interval [CI], 0.48–0.87). When jointly assessed using the high and low cut-off points, low sodium and corresponding high calcium, magnesium, and potassium intake somewhat reduced the odds of hypertension 0.39 (95% CI, 0.20–0.76). The sodiumto-potassium ratio was positively associated with hypertension in the highest quartile1.50 (95% CI, 1.11–2.02). When potassium was adjusted for sodium intake and sodium-topotassium ratio assessed among women, increased odds of hypertension were reported in the highest quartile as 2.02 (95% CI, 1.18–3.34) and 1.69 (95% CI, 1.12–2.57), respectively. The association of combined minerals on hypertension using dietary goals established that men meeting the reference intakes for calcium and exceeding for magnesium had reduced odds of hypertension 0.51 (95% CI, 0.30–0.89). Women exceeding the recommendations for both calcium and magnesium had the lower reduced odds of 0.30 (95% CI, 0.10–0.69). CONCLUSIONS Our results suggest that the studied minerals' association on hypertension is stronger when jointly assessed, mostly after gender stratification. As compared to men, women increased their risk of hypertension even with a low sodium intake. Women would also reasonably reduce their risk of developing hypertension by increasing calcium and magnesium intake. In comparison, men would somewhat be protected from developing hypertension with calcium intake meeting the dietary goals and magnesium exceeding the nutritional goals.