Objective: Our aim was to study the concentrations and regulatory characteristics of heparin-binding epidermal growth factor-like factor (HB-EGF) and its functional consequences in inducing the activities of hexokinases (HKs) and net Glc utilization. Methods: The SV40MES13 cell line was used as cell model for this experiment to measure the total activity of Hks by using a standard G6PDH-coupled assay. The net Glc utilization was measured indirectly as Glc disappearance from the medium using the standard Glc oxidase-coupled reaction(Trinder). Results: The HB-EGF induced HKs activity in time- and dose-dependent manners and increased the net Glc utilization by SV40MES13 cells. Conclusion: The HB-EGF plays an important role in pathogenesis of diabetic nephropathy by inducing total HKs activity specifically and increases the net Glc utilization in mesangial cells.

The coronavirus disease 2019 (COVID-19) pandemic poses negative impacts on psychological health among healthcare workers. If timely diagnosis and interventions are not given, the pandemic not only threatens physical and psychological health among healthcare workers, and greatly reduces the quality and efficiency of medical treatment. Based on review of national and international publications pertaining to psychological problems and interventions among healthcare workers during the COVID-19 pandemic, this article describes the prevalence of psychological problems among healthcare workers, influencing factors and psychological interventions, so as to provide insights into the protection of psychological health among healthcare workers.

Tyrosine phosphorylation is a key post-translational mechanism that regulates cellular processes and maintains homeostasis.Aberrant changes in tyrosine phosphorylation are often associated with disease states such as metabolicdisorders,cancer and cardiovascular disease.Protein tyrosine phosphatases (PTPs) are the enzyme family that regulates protein phosphorylation level of tyrosine residues in the cellular processes and signaling ways.So far,scientists have discovered 112 kinds of human PTPs.Among them,PTP1B is widely and clearly studied.Recently,as an enzyme that play a role in oncogenesis,PTP1B has been wildey studied by scientists.Here,we highlight the relationship between protein tyrosine phosphatase 1B and hematologic neoplasms.

OBJECTIVE TTo evaluate the clinical manifestations of the laryngeal amyloidosis and its laryngoscopic characteristics.METHODS The clinical data of 11 cases with laryngeal amyloidosis confirmed pathologically was studied retrospectively. RESULTS There were 4 males and 7 females in this study.The age of the patients ranged from 16 to 64 years old (average 43.36?4.16).The duration of symptoms was 4 months to 10 years (average 2.85?0.87 years).Hoarseness presented in 10 patients (90.90%) and dyspnea in 4 patients.The false vocal cord was involved in 8 patients,laryngeal ventricle in 6 patients,true vocal cord in 5 patients and subglottic area in 3 patients observed with fibrolaryngoscope. The appearance of the lesions was mainly described as waxy yellow or yellow-gray submucosal plaques and nodules without ulceration of the overlying mucosa.The laryngostroboscopy demonstrated that the wave of the mucosa and vibration of the involved vocal cords were adynamic or disappeared.CONCLUSION The chief complaint of the laryngeal amyloidosis was hoarseness. Laryngeal amyloidosis is a slowly progressive disease. The lesions commonly involve the false vocal cord, laryngeal ventricle,true vocal cord and subglottic area.

Objective To analyse protein tyrosine phosphatase 1B (PTP1B) gene mutation in myeloproliferative neoplasms (MPN).Methods DNA sequencing technology was used to detect DNA sequences of PTP1B in MPN patients (n =84) and normal controls (n =37).Results For Exon1-6,Exon9 and Exon10,84 cases of MPN patients and 37 cases of control group were not detected mutation.For EXON 8,18 of 84 MPN patients had Exon8 C/T heterozygous mutation and 10 of 37 normal controls were detected C/T heterozygous mutation.There was no significant difference between MPN patients and normal controls (x2 =0.453,P =0.501).Exon7 was detected in 38 MPN patients and 2 cases of patients were found C/T heterozygous mutation,while in the control group,1 case with G/C heterozygous mutation.All of the cases were not detected homozygous mutation.Conclusion Using DNA sequencing technology to detect gene mutations of PTP1B,there is no significant difference between MPN patients and normal controls.

As a vital component in an overall laboratory animal care and use program , development of a disaster plan plays a critical role for every research institution .Currently, most of domestic institutions would draw up an“emergency operation plan , EOP”, but ignoring a practicable “business continuity plan , BCP” in establishing a disaster plan.In this article, we will discusse about the definition of disaster , how to set up an EOP, and how to establish a thorough BCP , in order to show an integrated and professional disaster plan in laboratory animal care and use program .

Objective To study the effect of stigma maydis aqueous extract(SMAE) on glucagon in type 2 diabetic rats.Methods Type 2 diabetic male Sprague-Dawley rat mode was induced by high-fat and high-sugar dietary feeds and low dose streptozotocin(STZ). After 8 weeks of treatment,levels of fasting blood glucose(FBG) and glucagon(Glu) in serum were respectively assayed.Immunohistocmical study was adopted to analyze the expression of glucagon in islet cells.Results Compared with model control group,SMAE of middle and high dose remarkably reduced the level of FBG and Glu(P

The association of plasma tissue type plasmingogen activator (t-PA) and plasminogen activator inhibitor (PAI-1) with carotid atherosclerosis in patients with type 2 diabetes was explored.The subjects with type 2 diabetes (n =91) and control subjects (n =30) were enrolled for this study.According to carotid artery intima media thickness in Color Doppler Ultrasonography,the subjects with type 2 diabetes were divided into four groups:normal carotid group(group 1,n =25),lining thickening group (group 2,n =30),stable plaques group (group 3,n =23),carotid stenosis group(group 4,n =13).Plasma t-PA and PAI-1 levels were measured by ELISA.Compared with the control group,there was no significant change in the levels of plasma t-PA and PAI-1 in group 1 (P＞0.05),plasma t-PA activity was decreased significantly(P＜0.05) and PAI-1 activity increased obviously (P＜0.05) in group 2,group 3,and group 4.Carotid atherosclerosis degree was negatively correlated with t-PA(r=-0.723,P＜0.01) and positively correlated with PAI-1 (r=0.851,P＜0.01).The results suggested that the abnormal fibrinolysis function may take part in the development of atherosclerosis of carotid arteries in patients with type 2 diabetes.

Objective　To study the effect of minielctrocholecystectomy(MEC) for gallbladder stone. Methods　The clinical data of 4,200 cases(1991-2000) undergoing MEC were analysed restrospectively; the results of different operotors for the MEC were compared. Results　All 4,200 cases were cured. Of them, 41 cases(0.98%) had serious complications, including intraoperative bleeding in 4 cases(0.09%), biliary tract injury in 18(0.43%); stress ulcer in 8(0.19%), and residual stones of biliary tract in 11(0.26%). Conclusions　MEC has the following advantages: less trauma, short operation time, fast postoperative recovery and lower expense. The different operotors on MEC have distinguish difference in the results. It is important to preven the complications of MEC.

Objective To probe multislice spiral computed tomography(MSCT) features of superacute cerebral infarction.Methods 19 cases with superacute cerebral infarction were retrospectively analysed.MSCT scans were performed in all patients at 1～6 h after onset,and the lesions were proved by MSCT or MR at 3 h～5 d after onset.MSCT signs of superacute cerebral infarction were observed.Results 17 cases and 2 cases were diagnosed and suspectively diagnosed with superacute cerebral infarction by CT at first visit of patients.CT features of superacute cerebral infarction included hypodense of cerebral parenchyma in 19 cases,local cerebral swelling in 13 cases and hyperdense sign of cerebral artery in 3 cases.Conclusion MSCT plain scan has significant value in diagnosis of superacute cerebral infarction.