Objective To investigate the clinical significance of HCV core antigen (HCV-cAg )in hepatitis C screening. Methods From October 2014 to October 2015 ,a total of 8000 serum samples were collected from the outpatient and inpatient. HCV-cAg and hepatitis C antibody (HCV-Ab) were detected by using ELISA.The positive samples of HCV-cAg or HCV-Ab were performed the confirmative diagnostic detection by PCR.Results Among 8000 serum samples ,82 positive samples were screened out ,in which 73 cases were HCV-RNA positive by elementary screening with the standard of HCV-cAg or HCV-Ab positive ,a-mong which 72 were HCV-RNA positive and and 9 cases were HCV-RNA negative by HCV-RANA confirmation.The sensitivity and specificity of HCV-cAg were 45.83% and 99.98% ,sensitivity and specificity of HCV-Ab were 94.44% and 99.90% ,which of HCV-cAg and HCV-Ab combined detection were 100.00% and 98.86% respectively.Conclusion HCV-cAg and HCV-Ab play complementary role in HCV screening.Their combined detecting contributes to increase the screening rate of HCV.

Objective To explore the role of depression as a moderator of self-concept on self-care behaviors in patients with chronic heart failure(CHF).Methods A sample of 160 in-patients with CHF were recruited from a cardiovascular hospital in Beijing.Data were collected by self-report questionnaires assessing self-care behaviors,self-concept and depression.Analysis of Moment Structures (AMOS) version 17.0 software was used to conduct the path analyses.Results Body sensation,self-consistency,self-ideal,moral-ethical-spiritual self and depression revealed direct effects on self-care behavior.Body sensation,self-ideal,moral-ethical-spiritual self affected self-care indirectly via depression.These paths' total coefficients were 0.09,0.15,0.31,0.09 and -0.26,respectively.Conclusion Self-care behaviors are directly affected by self-concept and depression.Depression has a greater moderating effect on these relationships.The findings provide a theoretical basis to direct the development of interventions for improving self-care in individuals with heart failure.

Objective To investigate the change rule and correlation of heme oxygenase-1(HO-1)/carbon monoxide(CO)and the influence of simvastatin and amlodipine in athemsclemtic progress.Methods The rabbits received 1％cholesterol diet(n=24)for eight weeks.After eight weeks,rabbits were fed with normal diet for eight weeks.The rabbits in model group(n=8)were administrated with cholesterol diet.The rabbits in simvastatin group(n=8)were administrated with simvastatin.The rabbits in amlodipine group(n=8)were administrated with amlodipine.The levels of serum lipids and plasma carbon monoxide were obtained at the beginning,the 8th week and the 16th week.The expression of heme oxygenase-1 in the thoraoia aortic tissue were observed with immunohistochemistry technique.Results By the end of 16th week,the levels ofserum lipids and plasma carbon monoxide in model group were obviously increased,however,the expression of heine oxygenase-1 were markedly decreased.Compared with model group.The levels～rurfl lipi&and plasma carbon monoxide in simvastatin group were significantly decreased,while the expression of heme oxysenase-1 in aortic great reduced.The levels flerum lipids in amlodipine group were not significant ckmged,the levels of plasma carbon monoxide were obviously decreased,while tlle expression ofheine oxygenase-1 in aortic great reduced.Conclusions In atheresclerofic progress,heme oxygenase-1(HO-1)/carbon monoxide(CO)appared the reciprocal relationship,and amlodipine may suppress athemsclemtie progress by decreasing the system.

Objective In this study,we investigated the hair cell apoptosis and the molecular mechanisms in age-related hearing IOSS mouse cochlea.Methods All animals were assessed by ABR and DPOAE analysis in both ears.TUNEL(Terminal dexynucleotidyl transferase(TdT)mediated dUTP Nick End Labeling)and PI were used to identify DNA fiagments and caspase-3 activities in hair cells.Results The results showed that the nmf308 mice had progressive hair cell loss along with age.The cochlear OHCs were reduced 5%～10% at 1 month and 100% at 3 month in the basal region.Substantial amounts of TUNEL-postive OHCs nuclei were observed at age of 1 month,and activated caspase-3 labeling OHCs were most obviously observed at age of 2 months.Conclusion These results suggest that DNA single strand break is attributed primarily to apoptosis of cochlear lesion,and activation of caspase-3 at leter stage leads to the hair cell apoptiovs of nuclear condensation in age-related hearing loss mouse cochlea.

Objective In this study ,we investigated the apoptosis of hair cell in the cochlea of age -related hearing loss(AHL) generated by ENU mutagenesis ,and to study a pan caspase inhibitor (z-VAD -FMK) which is to protect the cochlea hair cells from hearing loss induced by age-related hearing loss(AHL) .Methods Through z-VAD-FMK intraperitoneal injection and round window membrane (RWM) drug were delivered into the Cdh23 nmf308 nmf/nmf mice 5(postnatal days 2 -32) inner ear .ResuIts The results showed that the nmf308 mice with progressive hair cell loss along a base to apex gradient with age-related hearing loss .The cochlear OHCs reduced from 5% ~10% at 1 month to 100% at 3 month in the basal region .Substantial amounts of TUNEL -positive OHCs nuclei appeared at 1 month age ,and activated caspase-3 labeling demonstrated that most OHCs appeared at 2 months age .These suggested that DNA single strand break was attributed primarily to apoptosis of cochlear le_sions ,whereas in the later stage of lesion ,the expansion led to activation of caspase-3 activity reduced with further progression of nuclear condensation in age-related hearing loss .ConcIusion The addition of a pan caspase inhibitor (z -VAD -FMK ) significantly protected the cochlea against the hair cell loss induced by apoptosis .Our study showed that aspase inhibitor ,Z-VAD-FMK appeared to play a prominent role in age-related hearing loss media_ted hair cell death loss induced by apoptosis .Our study showed that aspase inhibitor ,Z-VAD -FMK appeared to play a prominent role in age-related hearing loss mediated hair cell death .

Objective To study the recovery of the outer hair cells in the bat cochlea after gentamicin exposure.Methods Bats were injected with a daily dose of gentamicin for 15 consecutive days and bromodeoxyuridine (BrdU)was given from day 16 to day 40 of this recovery phase. Hearing was assessed by overt acoustic behavior and auditory brainstem responses analysis, which was performed one day prior to the first injection and a day after the last injection (day 16). On day 40 animals were sacrificed for detection of cells that could take up BrdU. Results After 15 days of gentamicin treatment, all of the animals were proved to be deafened with significant increases of ABR thresholds,compared with control group. The findings in immunocytochemical stained samples and scanning electron microscopy revealed that BrdU labeled nuclei were observed in the cochlea in all of the deafened animals most commonly in the regions of the first-row and second-row Deiter's cells (DCs) and occasionally in the regions of the third-ruw DCs.Conclusion We suggest that, under sufficient drug and enough time, the bat cochlear supporting cells can directly transdifferentiate into the outer hair cells after aminoglycoside exposure. This transdifferentation process is essential for repair of outer hair cells and recovery of normal function after gentamicin exposure.

Objective: To understand the working categories of primary percutaneous coronary intervention (PCI) nursing and its existing problems, and to provide a realistic basis for the construction of primary PCI in clinical nursing. Methods: Qualitative interviews were used to carry out semi-structured and personal in-depth interviews among 5 doctors and 27 nurses in 5 hospitals. 7 step analysis of Colaizzi was used to analyze the data. Results: The working categories of primary PCI nursing involves professional team management, early identification, preoperative preparation, evaluation and predictive nursing, disease observation, safe transfer, psychological nursing and health guidance. Conclusion Primary PCI nursing is still in the stage of continuous optimization, but some parts of the process are not standardized and the nursing behavior is inconsistent. Primary PCI nursing needs to form nursing behavior norms under the guidelines of evidence-based medicine.

Plant dehydroascorbate reductase (DHAR) is a physiologically important reducing enzyme in the ascorbate-glutathione recycling reaction. In this study, two DHARs genes (SmDHAR1 and SmDHAR2) were isolated from Selaginella moellendorffii. The SmDHAR1 and SmDHAR2 genes encode two proteins of 218 and 241 amino acid residues, with a calculated molecular mass of 23.97 kDa and 27.33 kDa, respectively. The genomic sequence analysis showed SmDHAR1 and SmDHAR2 contained five and six introns, respectively. Reverse transcription PCR revealed that the SmDHAR1 and SmDHAR2 were constitutive expression genes in S. moellendorffii. The recombinant SmDHAR1 and SmDHAR2 proteins were overexpressed in E. coli, and were purified by Ni-affinity chromatography. The recombinant SmDHAR1 showed 116-fold higher enzymatic activity towards the substrate dehydroascorbate than recombinant SmDHAR2. The recombinant SmDHAR1 showed higher thermal stability than recombinant SmDHAR2. These results indicated obvious functional divergence between the duplicate genes SmDHAR1 and SmDHAR2.
Amino Acid Sequence ; Base Sequence ; Cloning, Molecular ; DNA, Plant ; genetics ; Escherichia coli ; genetics ; metabolism ; Molecular Sequence Data ; Oxidoreductases ; biosynthesis ; chemistry ; genetics ; Plant Proteins ; biosynthesis ; chemistry ; genetics ; Recombinant Proteins ; biosynthesis ; genetics ; Selaginellaceae ; enzymology ; genetics ; Sequence Analysis, DNA

Objective To investigate the effect of atorvastatin on blood lipid and carotid atherosclerosis in patients with hyperlipidemia and cerebral infarction.Methods 98 patients with hyperlipidemia and cerebral in-farction in our hospital from September 2014 to February 2017 were selected and divided into observation group(49 cases)and control group(49 cases)according to the random number table method.The control group was treated with conventional treatment,the observation group was treated with atorvastatin on the ba-sis of the control group.The two groups were treated for 4 weeks.The ADL score,NIHSS score,blood lipid index,carotid IM T and carotid plaque area were compared between the two groups before and after treatment. Results ADL score of the patients in the observation group after treatment higher was than the control group (t=12.7783,P<0.05),NIHSS score was lower than the control group(t=10.941,P<0.05);LDL-C,TC and TG levels after treatment in the observation group were than in the control group(t= 17.239,9.216, 9.800,P<0.05),while the HDL-C level was higher than the control group(t=7.683.P<0.05);the patients in the observation group were treated by carotid artery IM T and carotid plaque area was higher than that of the control group(t=8.919,6.344,P<0.05).Conclusion Atorvastatin can improve hyperlipidemia in pa-tients with cerebral infarction and carotid atherosclerosis,dyslipidemia,has the important research signifi-cance.

Objective:To analyze the application value of metagenomic next-generation sequencing (mNGS) in the detection of pathogenic bacteria in brain abscesses.Methods:The data of patients with brain abscess in Tianjin Huanhu Hospital from January 2019 to December 2021 were retrospectively analyzed. All patients underwent stereotaxic abscess puncture and drainage. According to the different methods of pathogen detection, they were divided into bacterial culture group (bacterial culture only) and mNGS group (bacterial culture with mNGS). The clinical symptoms, abscess site, bacterial culture and mNGS results, antibiotic application protocol and prognosis of the patients were analyzed. The bacterial detection results of the two groups were analyzed, and the antibiotic application and prognosis were compared. χ 2 test, exact probability method and Mann Whitney test were used to compare the difference between the two groups. Results:A total of 43 patients with brain abscess were enrolled, including 21 cases in bacterial culture group and 22 cases in mNGS group. The positive rate of bacteria culture group was 42.9% (9/21), the positive rate of bacteria culture group was 45.5% (10/22), and the positive rate of mNGS detection was 100% (22/22). Only 3 cases in the bacterial culture group could have a clear bacterial source, while 17 cases in the mNGS group could have a clear bacterial source according to the bacterial results, showing a significant statistical difference between the two groups (χ 2=19.69, P<0.001). The return time of bacterial culture was 7.0 (4.0,7.0) days, and the average return time of mNGS was 1.5 (1.5,1.5) days, the difference of bacterial return time between the two groups was statistically significant ( Z=0.00, P<0.001). The cost of antibiotic use in bacterial culture group was 24.00 (5.60,31.00) thousands yuan, and the cost of antibiotic use in mNGS group was 12.00 (2.10, 20.00) thousands yuan, and there was significant statistical difference between them ( Z=5.22, P=0.026). Conclusions:MNGS can quickly and accurately identify the types and sources of brain abscess pathogens, guide the clinical application of antibiotics more targeted, reduce the cost of antibiotic use, and is an effective method for the detection of brain abscess pathogenic bacteria.