Objective　This study was to establish enzyme-rate method for determining serum beta-hydroxybutyric acid ,and to discuss its meaning in diabetes ketosis acidism. Methods　Enzyme-rate method was used to determine serum beta-hydroxybutyric acid in 60 cases of normals, 30 cases of diabetes ,and 8 cases of ketosis acidism by Hitachi 7170A autochemistry analyzer. Results　The recovery rate is 108%,the linerity extent 0-4.0 mmol.L-1, the coefficient of variation within-run is 2.2%and day-to-day is 2.6%. Conclusion　The enzyme-rate method for determining serum beta-hydroxybutyric acid save time, gives accurate results and has wide linerity,so it can used for diagnosis of diabetes ketosis acidism.

Objective To discuss application of evidence-based nursing in nasopharyngeal carcinoma patients undergoing radiotherapy. Methods Evidence-based nursing was used in 33 nasopharyngeal carcinoma patients undergoing radiotherapy. Results After evidence-based nursing, all the patients actively cooperated with the doctors and nurses, lived through the treatment process smoothly, and radiotherapy complications were reduced or avoided. Conclusions Evidence-based nursing is an idealized nursing method which could reduce or avoid the complications and alleviate the pain of patients and improve the quality of nursing.

BACKGROUND: Telomerase can maintain the telomere length and avoid cel replicative senescence and apoptosis in somatic cells. Its catalytic subunit cal ed telomerase reverse transcriptase has roles in mediating cellsurvival and anti-apoptotic functions. OBJECTIVE: To evaluate the effects of human telomerase reverse transcriptase on amyloid β1-40-induced human embryonic cortical neurons injury. METHODS: Human cortical neurons derived from 12-16 weeks old aborted fetuses were transfected with recombinant adenovirus vector encoding human telomerase reverse transcriptase. Expression of human telomerase reverse transcriptase was evaluated by immunocytochemical staining. Telomerase activity was measured using a PCR-based telomeric repeat amplification protocol enzyme-linked immunosorbent assay kit. Human embryonic cortical neurons were treated with 10 μmol/L ol/L amyloid β1-40 after transfected for 3 days. Cel viability, reactive oxygen species levels and glutathione contents in human embryonic cortical neurons were respectively detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, fluorescent probe 2',7'-dichlorodihydrofluorescein diacetate and chromatometry. RESULTS AND CONCLUSION: Expression of human telomerase reverse transcriptase reached peak at 3 days after transfection, and the telomerase activity was rebuilt; 10 μmol/L amyloid β1-40 could significantly reduce the cel viability of neurons and glutathione content (P < 0.05 and P < 0.01), and increase the reactive oxygen species levels (P < 0.05). The neurons transfected with human telomerase reverse transcriptase gene could be significantly against the toxicity of amyloid β1-40 and increase the cel viability and glutathione content (P < 0.05 and P < 0.01), and decrease the reactive oxygen species levels (P < 0.05). The results indicate that human telomerase reverse transcriptase can protect amyloid β1-40-induced human embryonic cortical neurons injury

Objective To identify novel mutations in the GATA6 gene associated with congenital atrial septal defects (ASD).Methods This was a case-control study.A cohort of 220 unrelated Han-race patients with congenital ASD and 200 unrelated ethnically matched healthy individuals used as controls,who were admitted to Tongji University Affiliated Tongji Hospital from January,2007 to October,2011,were recruited.The peripheral venous blood samples from the participants were prepared.All the coding exons and their flanking sequences of the GATA6 gene were amplified by polymerase chain reaction and sequenced using the di-deoxynucleotide chain termination technique.The acquired sequences were aligned with the sequences derived from GenBank by BLAST to identify the sequence variations.The software ClustalW was used to analyze the conservation of the altered amino acids.Results Three novel heterozygous missense GATA6 mutations,c.250G ＞A (p.A84T),c.649G ＞C (p.G217R) and c.1270A ＞C (p.S424R),were identified in 3 of 220 ASD patients,respectively.None of the three mutations was detected in 200 healthy control individuals.A cross-species alignment of GATA6 encoded protein sequences showed that the mutated amino acids were relatively conserved evolutionarily.Conclusion The identification of novel GATA6 mutations associated with ASD contributes to the reveal of the mechanism involved in the pathogenesis of ASD.

Objective To study the role of prefrontal cortex in maintenance of working memory(WM)using event-related functional MRI(ER-fMRI).Methods Twenty healthy subjects completed a relative lower,high load version of the sternberg item recognition task during ER-fMRI.The brain areas showing activity on average across the two loads for maintenance phase were obtained with group analysis.Load dependent activity was identified with inter-group analysis.Results The maintenance phase were relevant to the activity in dorsolateral prefrontal cortex(DLPFC),ventrolateral prefrontal cortex(VLPFC),parietal lobe,supplementary motor area(SMA)and premotor cortex(PMA).Brain regions including VLPFC showed increased activation for high load level.Conclusion Functional difference but not anatomic difference between maintenance and manipulation in brain may be exist.

Objective To investigate the calcium dobesilate tablets combined with mecobalamin injection in treatment of diabetic peripheral neuropathy and effects on oxidative stress and neurotrophic factor.Methods 82 cases of diabetic peripheral neuropathy(DPN) patients from February 2015 to October 2016 in our hospital were selected and randomly divided into observation group and control group with 41 cases in each group.The control group was treated with mecobalamin injection, the observation group were treated with calcium dobesilate tablets.The course of treatment was two weeks in two groups.Results The total efficiency of the observation group (90.24%) was higher than the control group (68.29%) , the difference was statistically significant ( P<0.05 ) , patients in the observation group after the treatment of common peroneal nerve and median nerve SCV and MCV higher than the control group, the difference was statistically significant (P <0.05), the level of serum malondialdehyde (MDA) in the observation group was lower than that in the control group and the level of superoxide dismutase ( SOD) in the observation group was higher than that in the control group, the difference was statistically significant (P<0.05), the levels of serum NGF and BDNF in the observation group were higher than those in the control group, the difference was statistically significant (P<0.05), the two groups were no obvious adverse reactions.Conclusion Calcium dobesilate tablets and mecobalamin injection curative effect in the treatment of diabetic peripheral neuropathy , and patients could improve oxidative stress and neurotrophic factors, and the safety is good, has the important research significance.

Objective To explore susceptibility of praziquantel(PQT) against Schistosoma japonicum in the repeated chemotherapy areas in Dongting Lake region of China. Methods Sixty mice were divided into two groups, and infected respectively by cercariae released from the infected snails which were collected from new and old endemic areas. After 5 weeks, the mice in each group were divided into control groups and treatment groups (PQT group). The mice in each PQT group were treated with a single oral dose of praziquantel (600 mg/kg). Three weeks post treatment, mice were dissected, and the number of adults, the stool eggs per gram (EPG), the liver EPG and the hatching rates were observed. Results The worm reduction rates of the PQT groups of new and old epidemic areas were 98.24% and 98.71% respectively, and the stool egg reduction rates 99.94% and 99.64%, the liver egg reduction rates 75.85% and 73.10%,and there were no significant differences between the new and old endemic areas. The stool hatching test was positive in the control groups, and negative in the PQT groups. Conclusion Susceptibility of praziquantel against Schistosoma japonicum does not decrease in repeated chemotherapy areas in Dongting Lake region.

Objective:To correlate homocysteine (Hcy) and blood lipid levels with neurological function in patients with progressive ischemic stroke.Methods:A total of 400 patients with ischemic stroke who received treatment between June 2018 and June 2020 in Linhai Second People's Hospital were included in this study. Progressive ischemic stroke ( n = 126) and non-progressive ischemic stroke ( n = 274) groups were designated. Hcy level was determined by enzyme-linked immunosorbent assay. High-density lipoprotein cholesterol, triacylglycerol, low-density lipoprotein cholesterol and cholesterol levels were measured using a biochemical analyzer. Hcy and blood lipid levels as well as National Institute Health of Stroke Scale (NIHSS) score were determined in each group. Hcy and blood lipid levels were correlated with NIHSS score. Results:Hcy level in the progressive ischemic stroke group was significantly higher than that in the non-progressive ischemic stroke group [(28.39 ± 4.36) μmol/L vs. (20.17 ± 3.24) μmol/L, t = 18.894, P < 0.05]. Low-density lipoprotein cholesterol , triacylglycerol and TC levels in the progressive ischemic stroke group were (3.29 ± 0.45) mmol/L, (2.08 ± 0.34) mmol/L and (4.82 ± 0.79) mmol/L, respectively, which were significantly higher than those in the non-progressive ischemic stroke group [(2.48 ± 0.37) mmol/L, (1.56 ± 0.29) mmol/L and (4.08 ± 0.43) mmol/L, t = 17.644, 14.859, 9.860, P < 0.05]. High-density lipoprotein cholesterol level in the progressive ischemic stroke group was significantly lower than that in the non-progressive ischemic stroke group [(1.03 ± 0.13) mmol/L vs. (1.19 ± 0.14) mmol/L, t =11.158, P < 0.05]. NIHSS score in the progressive ischemic stroke group was significantly higher than that in the non-progressive ischemic stroke group [(21.72 ± 4.35) points vs. (15.52 ± 2.89) points, t = 14.582, P < 0.05]. Hcy, low-density lipoprotein cholesterol, cholesterol and triacylglycerol levels were linearly and positively correlated with NIHSS score ( r = 0.846, 0.724, 0.718, 0.765, all P < 0.05), while igh-density lipoprotein cholesterol level was linearly and negatively correlated with NIHSS score ( r = -0.710, P < 0.05). Conclusion:In patients with progressive ischemic stroke, Hcy level is increased and blood lipid level is obviously abnormal. Hcy and blood lipid levels are greatly correlated with neurological function.

Objective To study the effects of different preservation methods on the isolated liver injury and regeneration.Methods Twelve Sprague-Dawley rats were randomly assigned to two groups:static cold storage (SCS) and hypothermic machine perfusion (HMP) (n =6 each).Histidinetryptophan-ketoglutarate solution (HTK) was used as preservation solution.The graft was preserved in HTK (4 C) for 6 h in SCS group,and that was perfused using HTK in HMP group.Liver tissue was obtained and fixed in 10％ neutral formalin for immunohistochemistry.The fresh liver tissue was collected and stored in-80℃ for RT-PCR and Western blotting analyses.Results Compared to SCS,HMP improved liver regeneration ability in terms of PCNA and ki67 detection and promoted cell proliferation in PCR levels (Cdc25A,cdk1,cdk6) and Western blotting levels (Cyelin D1,Cyclin E1).Conclusion HMP is superior to SCS in liver regeneration,and expected to be the ideal method for preservation of donor liver.