Objective:This study investigated 376 adolescents' interpretations to peer rejection events. Methods:Measuring 376 adolescents' degrees of peer acceptance and their interpretations to peer rejection events by means of pen and paper questionnaires.Results:Peer-rejected adolescents presented a similar way of general interpretation to rejected events happened in other peers,however they interpret their own rejected events in a completely different way compared with popular adolescents:The main effects of peer acceptance types were significant on objective and subjective question scores(F(3,344)=3.212,P=0.023;F(3,344)=4.059,P=0.007, respectively);and there was a significant interaction effect of sex?age?peer acceptance types (F(9,344)=3.447, P

Objective Explore the feasibility of minute cells STR typing.Methods Minute cells which were obtained by micromanipulation method were amplified with MiniFiler kit,and detected by ABI 3130 genetic analyzer.Results Ten cells can be successfully genotyped.Complete genotyping results can be obtained for one,three or five cells but with stochastic effect.Conclusion Instability is observed in minute cells genotyping,so it can not be used in actual case work.Maybe increase the quantity of DNA template can improve the success rate.

Arrhythmias, Cardiac ; etiology ; therapy ; Gap Junctions ; Stem Cell Transplantation ; adverse effects

Child ; Choristoma ; pathology ; Diagnosis, Differential ; Follow-Up Studies ; Humans ; Male ; Neoplasms, Glandular and Epithelial ; pathology ; Thymus Gland ; pathology ; Thymus Neoplasms ; pathology ; Thyroid Neoplasms ; pathology

Objective To investigate the effect of brain natriuretic peptide (BNP) on serum angiotensin-converting enzyme (ACE) 2 levels in acute heart failure patients with reduced ejection fraction (HFrEF). Methods A total of 106 patients with acute HFrEF were selected, and were divided randomly into control group and trial group. The control group was under routine treatment, while the trial group was under routine treatment combined with lyophiluzed recombinant human BNP for 24-hour. Cardiac functional parameters were measured by echocardiography both at the enrollment and the end of 7-day treatment. Serum levels of ACE2 and N-terminal pro-BNP (NT-proBNP) were determined using commercially available ELISA kits at the enrollment, the end of 24-hour treatment, and the end of 7-day treatment,respectively. Results A total of 103 patients with acute HFrEF were enrolled (control group=51, trial group=52). There were no significant differences in the use of drugs (e.g., aspirin) and serum biochemical indices (e.g. cardiac troponin I, creatinine) before treatment between these two groups. Compared to systolic blood pressure (SBP) at admission, SBP on the second day after treatment were significantly decreased in two groups (P<0.05). Compared to left ventricular ejection fraction (LVEF) at admission, LVEF values were significantly elevated on the seventh day after treatment in two groups ( P<0.05). There were no significant differences in SBP, diastolic blood pressure (DBP), and LVEF at admission between these two groups (P>0.05);there were also no significant differences in DBP on the second day after treatment, and LVEF on the seventh day after treatment (P>0.05), while SBP was significantly higher on the second day after treatment in control group than that of trial group (P < 0.05). Serum levels of NT-proBNP were decreased with the prolongation of time in two groups. Serum levels of ACE2 were decreased with the prolongation of time in control group, while were increased initially following decreased (which were still higher on the seventh day after treatment than that at admission) with the prolongation of time in trial group. Serum levels of NT-proBNP were higher after 2 days treatment or 7 days of treatment in control group than those of trial group, while serum levels of ACE2 were decreased after 2 days of treatment or 7 days of treatment in control group than those of trial group (P<0.05). Conclusion Patients with acute HFrEF may benefit from BNP by increasing serum ACE2 levels.

BACKGROUND: Gene therapy is a popular topic in domestic and overseas studies on biological therapy for brain tumor.OBJECTIVE: By using a newly constructed eukaryotic expression vector of pCR3-TK, the effect of the HSV-TK/ACV system on the proliferative activity of human glioma cells was investigated.DESIGN: Experimental study based on cells.SETTING: Department of neurosurgery and department of oncology in a university hospital.MATERIALS: The study was conducted at the National Key Laboratory of Veterinary Biotechnology of Harbin Veterinary Research Institute from January to April in 2004. The eukaryotic expression vector of pCR3-TK was constructed by the author. The TJ905 strain was a gift from professor Pu Pei-yu, who worked in the Neurology Institute of Tianjin city. The nontransfected cells and the cells transfected with pCR3-Uni vector were set as controls.METHODS: By using Lipofectamine(a cationic liposome), the pCR3-Uni vector and the recombinant pCR3-TK plasmid(inserted with HSV-TK gene)were transfected into the human glioma cell strain-TJ905. Then the positive clones were picked out and were given ACV(50 mg/L) . Totally 72 hours later, the cover slips were collected and silver staining for nucleolus organizer regions(AgNORs) was performed.MAIN OUTCOME MEASURES: After the ACV treatment and AgNORs staining, the numbers of silver-stained granules in TJ905 cells with or without transfections were counted respectively.RESULTS: In those cells transfected with HSV-TK gene, after ACV treatment, a significant decreasing in proliferative activity could be observed, and the average numbers of the silver-stained granules in cells transfected with pCR3-Uni or pCR3-TK were 14.33 and 6.67 respectively( P ＜ 0.01).CONCLUSION: As an easy-to-operate method, AgNOR counting is helpful for the studies on the proliferative activity of cells and the investigations into the potential anti-tumor mechanism of the HSV-TK/ACV system.

Objective To explore the risk factors for intracranial hemorrhage caused by late vitamin K deficiency bleeding(VKDB),in order to prevent and reduce the incidence of intracranial hemorrhage caused by late VKDB.Methods A retrospective analysis of the risk factors of late VKDB and intracranial hemorrhage was applied to 2 groups of patients in PICU and department of neurology of Beijing children's Hospital from Jan.2002 to Dec.2007.In group Ⅰ,there were 90 patients suffering from intracranial hemorrhage caused by late VKDB;while in group Ⅱ,there were 23 patients of late VKDB without intracranial hemorrhage.Within 12 hours of hospitalization,the following 9 items were checked:the cranial CT,blood calcium concentration,liver function,serum sodium,blood glucose,prothrombin time,partial thromboplastin time,fibrinogen concentration,and platelet.Ten possible relevant risk factors of gender,age,birth situation,feeding patterns,recent diarrhea,cytomegalovirus(CMV)infection,hypocalcemia,dysglycemia,hyponatremia,and abnormal liver function were analyzed by the method of non-conditional Logistic regression analysis.Results Statistically significant difference had been found in the 3 factors of hypocalcaemia,recent diarrhea,abnormal liver function(Pa