Objective To observe the effects of soybean isoflavone (SI) on the action potential of guinea pig papillary muscle and the sodium current in cultured neonatal rat cardiomyocyte.Methods The action potential of guinea pig papillary muscle was measured by glass suspension electrode and the sodium current in cultured neonatal rat cardiomyocyte was measured by whole cell patch-clamp technique. Results The SI reduced the action potential amplitude (APA) and shortened the 50% and 90% of duration of action potential (APD50 and APD90). The SI 0.1μg/ml inhibited sodium current in cardiomyocyte at a inhibition rate of 14.39 %, and the corresponding data of SI 1.0μg/ml at a inhibition rate of 23.48%. Conclusions The SI can reduce the APD of myocardiocyte and has a negative inotropic action on myocardium. These results indicate that SI inhibition of the sodium current may be one of mechanisms of its antiarrhythmic action.

As a safe,cheap and effective diabetes drug,metformin has been used for many years.Diabetes increases the risk of liver cancer and affects its prognosis.In recent years,it is found that metformin reduces the pancreatic cancer risk in the treatment of diabetic patients,a large of experiments also prove that it has anti-cancer and synergistic anticancer effect.This paper focused on the effects of metformin on treatment of Ⅱ type diabetes,discussed the curative effect on liver cancer,suggested the molecular biology mechanism of inhibiting tumor,listed the latest experiment researches,analyzed the existed clinical data,proposed the further study of anticancer mechanism and clinical treatment.Metformin for a future role in prevention of hepatocellular carcinoma in patients with type Ⅱ diabetes are briefly summarized and future prospects,which in type Ⅱ diabetic patients with liver cancer in a prospective study of the effect of treatment.Mefformin for application in other cancer prevention also raises possibilities.

Objective To investigate the clinical effect of gastric bypass operation on treating type 2diabetes,and analyze the management status.Methods Fifty-seven patients wiith type 2 diabetes treated by gastric bypass operation were divided by different body mass index(BMI) into 4 groups:group A( BMI ＜ 20kg/m2) with 8 cases,group B (20 kg/m2≤BMI ＜24 kg/m2) with 21 cases,group C (24 kg/m2≤BMI ＜27kg/m2) with 17 cases and group D (BMI ≥27 kg/m2) with 11 cases.The control of blood glucose and glycosylated hemoglobin,changes of diets and body weight,diabetes complications,adverse reactions after operation and postoperative management were followed up or reviewed.The clinical data were analyzed comprehensively.Results The cure rate of group C was the highest [ 70.6％( 12/17 ) ],while the cure rate of group A was the lowest (0).The overall cure rate was 43.9％(25/57) and the overall improvement rate was 28.1％(16/57).The overall efficient rate was 71.9％(41/57) and the overall inefficient rate was 28.1％(16/57).Apart from a few patients had malnutrition,amenorrhea,bad stomach,diarrhea and poor diet after leaving the hospital,other patients had no surgery complications and no patients died.There was no clinician to follow up and did education to these patients after operation.Conchusions Gastric bypass operation is safe and effective for obese and non-obese patients with type 2 diabetes.It is a new method to weat type 2diabetes at present,but the indications should be grasped and operation enlargement must he prevented.The management of teams of physicians,surgeons,dietitians,nurses should be established afler operation.

Objective To observe the changes of artery elasticity in patients with High-Normal Blood Pressure(HNBP) by ET, and search bound values in diagnosis by ROC. Methods Comparative analysis of artery IMT and β, Ep, AC, PWVβ with HNBP and normal group, which were analyzed by ROC. Results Compared with the normal group, β, Ep, PWVβ were increased in HNBP group, AC was lower significantly. Conclusion The peripheral artery elasticity have reduced before the artery IMT didn′t appear morphological change.

Objective To evaluate the value of transperineal pelvic ultrasound(TPUS) on long-term stress urinary incontinence (SUI) after total abdominal hysterectomy (TAH).Methods Thirty patients with TAH at least 2 years after operation were diagnosed as SUI according to clinical criteria and ultrasound criteria.They were divided into non-SUI group (Group Ⅱ,66 cases) and SUI group (Group Ⅲ,54 cases),72 cases of healthy patients were selected as the control group (group Ⅰ).TPUS was performed.The bladder neck rotation angle (△vBA),bladder urethral relief angle (rUJV,vUJV),urethral rotation angle (△vUIA),bladder neck mobility (BND),and the displacement of the bladder neck (vsB) were measured and recorded during the rest period and Valsalva state.Results According to the findings of ultrasound combined with pelvic floor parameters,the absolute values of △vBA,rUJV,vUJV,△vUIA,BND,vsB were increased in group Ⅱ compared with group Ⅰ (P＜0.05),which indicated that supportive function of the long-term pelvic floor tissue after TAH for a long-term was reduced.Compared with the non SUI group,the absolute values of △vBA,rUJV,vUJV,△vUIA,BND and vsB increased in the SUI group after TAH for a long term (P＜0.05).The absolute values of △vBA,rUJV,vUJV,△vUIA,BND,and vsB increased in the SUI group compared with the non-SUI group (P＜0.05),which indicated that after TAH,compared with non-SUI patients,the value of pelvic ultrasound parameters in patients with SUI increased more significantly.Conclusion The pelvic floor support function decreased after TAH,and pelvic floor function could be dynamically detected by TPUS in the early stage of TAH.

Objective To evaluate the application value of polarized light dermoscopy in the diagnosis of vitiligo and differential diagnosis between vitiligo and other common hypopigmented diseases.Methods Dermoscopic images of lesions of 235 patients with confirmed vitiligo (130 with active vitiligo and 105 with stable vitiligo) were collected from the database in the Department of Dermatology,Xijing Hospital from January 2018 to July 2018,and retrospectively analyzed.Meanwhile,dermoscopic images of amelanotic nevus (151 cases),pityriasis alba (113 cases) and idiopathic guttate hypomelanosis (54 cases) were compared with the dermoscopic images of vitiligo.Chi-square test was used for comparison of rates among groups.Results The prevalence of perifollicular pigmentation,reticular pigmentation,starburst,Tapioca sago and micro-Koebner phenomenon was significantly higher in the patients with active vitiligo than in those with stable vitiligo (x2 =36.5,151.2,13.0,14.9,8.4 respectively,all P ＜ 0.05).The prevalence of perifollicular pigmentation,perilesional hyperpigmentation,perifollicular telangiectasia,leukotrichia was significantly higher in patients with stable vitiligo than in those with active vitiligo (x2 =91.2,166.0,54.3,41.1 respectively,all P ＜ 0.05).The prevalence of residual perifollicular pigmentation was significantly higher in patients with active (89.2％,116/130) or stable vitiligo (54.3％,57/105) than in those with amelanotic nevus (20.5％,31/151,P ＜ 0.05),pityriasis alba (12.4％,15/113,P ＜ 0.05)or idiopathic guttate hypomelanosis (9.3％,5/54,P ＜ 0.05).Conclusion Residual perifollicular pigmentation could serve as an important feature for distinguishing vitiligo from achromic nevus,pityriasis alba and idiopathic guttate hypomelanosis,and polarized light dermoscopy shows good value in the differential diagnosis between vitiligo and some hypopigmented diseases.

Parathyroid disease is an endocrine disease caused by abnormal secretion of parathyroid hormone, which causes systemic multi-system reactions. Ultrasonography is currently the first-line method for the evaluation of parathyroid diseases and one of the important tools for preoperative localization of parathyroid lesions. In order to improve the ultrasonic diagnosis rate of parathyroid diseases, this article reviews the conventional ultrasound, contrast-enhanced ultrasound and ultrasound elastography characteristics of normal parathyroid glands and parathyroid diseases.

Objective:To analyze the effect of Croton leaf on ERK1/2 pathway in hippocampal of rats with cerebral ischemia-reperfusion.Methods:A total of 216 SD male rats were divided into sham operation group, model group, nimodipine group, low-dose, medium-dose and high-dose groups of croton leaf according to random nubmer table method, with 36 rats in each group. The MACO model of rats was prepared by the method of wire embolization. The high, medium and low dose groups were intragastrated with the water decoction 0.06 g/ml, 0.12 g/ml and 0.18 g/ml of Croton leaf; nimodipine group was intragastrated with nimodipine suspension 1.08 g/L; sham operation group and model group were intragastrated with equal volume of normal saline. Garcia JH score was used to conduct neurological function score, and HE staining was used to observe the morphology of hippocampal neurons after 7 days of continuous administration. Apoptosis of hippocampal CA3/DG region was detected by TUNEL assay. Western Blot was used to detect the expression of ERK1/2 and p-ERK1/2 proteins.Results:Compared with the model group at simultaneous point, the neurological function scores of low-dose, medium-dose and high-dose groups of Croton leaf increased ( P<0.01), the number of apoptotic cells decreased ( P<0.01), the expression of p-ERK1/2 / ERK1/2 [1 d: (0.22±0.03, 0.34±0.02, 0.46±0.01 vs. 0.19±0.02); 3 d: (0.38±0.02, 0.50±0.02, 0.68±0.02 vs. 0.27±0.02); 7 d: (0.29±0.03, 0.43±0.02, 0.59±0.02 vs. 0.21±0.03)] in hippocampus of the low-dose, medium-dose and high-dose groups of Croton leaf significantly increased ( P<0.01). Conclusion:Croton leaf could regulate the expression of ERK1/2 pathway protein upward, effectively improve the neural function and resist the apoptosis of hippocampal CA3/DG area of rats with cerebral ischemia-reperfusion injury.

The endoplasmic reticulum is a key site for protein production and quality control.More than one-third of proteins are synthesized and folded into the correct three-dimensional conformation in the endoplasmic reticulum.However,during protein folding,unfolded and/or misfolded proteins are prone to occur,which may lead to endoplasmic reticulum stress.Organisms can monitor the quality of the proteins produced by endoplasmic reticulum quality control(ERQC)and endoplasmic reticulum-associated degradation(ERAD),which maintain endoplasmic reticulum protein homeostasis by degrading abnormally folded proteins.The underlying mechanisms of protein folding and ERAD in mammals have not yet been fully explored.Therefore,this paper reviews the process and function of protein folding and ERAD in mammalian cells,in order to help clinicians better understand the mechanism of ERAD and to provide a scientific reference for the treatment of diseases caused by abnormal ERAD.

Objective:To investigate the activation of ubiquitin proteasome system (UPS) and autophagy in brain tissues of rats after severe traumatic brain injury (sTBI) and the role of autophagy in secondary traumatic brain injury.Methods:(1) Twenty-five SD rats were randomly divided into sham-operated group, group of 3 h after sTBI, group of 1 d after sTBI, group of 3 d after sTBI and group of 7 d after sTBI ( n=5). Only bone window was opened in sham-operated group, and controlled cortical impact (CCI)-induced sTBI models were established in the other 4 groups. Western blotting was used to detect the expressions of free ubiquitin, ubiquitinated protein, vacuolar protein sorting 34 (VPS34), P62, microtubule-associated protein-light chain 3-II, and Mature-cathepsin D (CTSD). (2) One hundred SD rats were randomly divided into normal control group, sTBI group, lactacystin group and SAR405 group ( n=25). Ten μL lactacystin or SAR405 were stereotactically injected into the lateral ventricle of lactacystin group and SAR405 group, respectively; 30 min after that, CCI-induced sTBI models were established in the sTBI group, lactacystin group and SAR405 group. Three d after modeling, the expressions of ubiquitinated protein, LC3-II, P62, and Caspase-3 were detected by Western blotting; percentage of brain water content was determined by dry/wet weight ratio; neurological functions were assessed by modified neurological deficit scale (mNSS); degrees of brain tissue damage were detected by HE staining; and cerebral blood perfusion was detected by laser scattering hemodynamic imaging system. Results:(1) Compared with sham-operated group, group of 3 h after sTBI, group of 1 d after sTBI, group of 3 d after sTBI and group of 7 d after sTBI had significantly decreased free ubiquitin, and group of 1 d after sTBI, group of 3 d after sTBI and group of 7 d after sTBI had significantly increased ubiquitinated protein in the brain tissues surrounding the injury lesions ( P<0.05). Compared with sham-operated group, group of 3 d after sTBI and group of 7 d after sTBI had statistically increased VPS34 and Mature-CTSD and significantly decreased P62 and group of 1 d after sTBI, group of 3 d after sTBI and group of 7 d after sTBI had significantly increased LC3-II in the brain tissues surrounding the injury lesions ( P<0.05). (2) The ubiquitinated protein relative expressions in the brain tissues surrounding the injury lesions of normal control group, sTBI group, lactacystin group and SAR405 group were 4.78±2.63, 10.62±0.73, 13.45±1.22 and 8.50±0.83, respectively, with significant differences ( P<0.05). Compared with the normal control group, the sTBI group, lactacystin group and SAR405 group had significantly higher LC3-II, ubiquitinated protein and cleaved caspase-3/pro-caspase-3, and significantly lower P62 in the brain tissues surrounding the injury lesions ( P<0.05); compared with the the sTBI group, the lactacystin group had significantly higher LC3-II, ubiquitinated protein, and cleaved caspase-3/pro-caspase-3, and significantly lower P62 in the brain tissues surrounding the injury lesions ( P<0.05); compared with the the sTBI group, the SAR405 group had significantly lower LC3-II, ubiquitinated protein and cleaved caspase-3/pro-caspase-3, and significantly higher P62 in the brain tissues surrounding the injury lesions ( P<0.05). Compared with the normal control group([67.60±2.51]%、[0±0] scores、[333.41±46.86] PU), the sTBI group, lactacystin group and SAR405 group had statistically higher percentage of brain water content and mNSS scores ([80.2±1.30]%, [87.0±1.58]% and [71.60±1.81]%; 13.8±1.10, 16.4±0.55 and 10.40±1.14) and signficantly lower cerebral blood perfusion volume ([53.98±5.99] PU, [21.71±2.62] PU and [87.97±6.75] PU, P<0.05); compared with the sTBI group, the lactacystin group had significantly higher brain water content and mNSS scores, and significantly lower cerebral blood perfusion volume ( P<0.05); compared with the sTBI group, the SAR405 group had significantly lower brain water content and mNSS scores, and significantly higher cerebral blood perfusion volume ( P<0.05). HE staining showed that the cortical tissues were most severely damaged in the lactacystin group, followed by the sTBI group; the least damage was noted in the SAR405 group, and no significant damage in the normal control group was noted. Conclusion:After sTBI, UPS activation is earlier than autophagy; autophagy inhibition helps to alleviate UPS dysfunction, reduce Caspase-3-induced apoptosis, and is beneficial to the recovery of neurological function.