0.5). It appears that both Load 1 and Load 2 accelerated the body metablism in the subjects, as evidenced by theadaptative rise in the frequency, amplitude and index of alpha waves. At a moderate load, the index of beta waves in the occipital region was 8.4% before the experiment, risingto 14.1% (P0.5)the 2-min interval. The increase in beta index in the occipital region indicates an increase of excitability of thecentral nervous system, and its return to normal after the 2-min interval signifies the adaptability of thesubjects.

Metabolic syndrome is the fundamental factor in the pathogenesis of a variety of diseases, and it has not yet been fully understood due to its complicated mechanism. Multiple re-searches have implicated that Wnt/β-catenin signaling pathway may have a significant effect on the formation and development of metabolic syndrome. LRP6 is an important co-receptor of Wnt/β-catenin signaling pathway ,and there are some researches im-plicating the correlation between LRP6 and metabolic syndrome. The in-depth research on the gene polymorphism and its modula-tion mechanism can provide new ideas and directions for meta-bolic syndrome therapy.

Objective To perform the validation and analysis of forensic param eters of G oldeneye?DNA ID 26Y system . Methods B ased on the validation rules of Scientific W orking G roup on DNA A nalysis M ethods (SW G D A M ),the kitwas assessed from several parts, as test of PCR system, reproducibility, ac-curacy, and sensitivity, etc. A nd Y-STR loci of 517 unrelated healthy individuals from E astern C hina were genotypes by this kit. The distribution and frequency of haplotype were calculated and forensic param e-ters of the kit were assessed. Results The com plete profiles can be obtained even when the PC R reac-tion volum e with 6.25μL . A nd correct profile was obtained with DNA down to 125 pg.No reproducible peaks were detected with the DNA of com m on anim als and m icroorganism with the kit. For the m ale-m ale m ixture testing, average 70% of the m inor alleles were obtained when the ratios of 1∶19 and 19∶1. For the m ale-fem ale m ixture testing, results showed that the sensitivity of the kit was no compromised with the addition of fem ale sam ples. Conclusion The validation studies dem onstrated that G oldeneye?DNA ID 26Y system has good sensitivity and specificity, and suitable for m ixture testing. The polym orphism of 26 Y-STR loci included in this kit are good for forensic application.

Objective To investigate the genetic data of 21 autosom al STR included in G oldeneyeTM DNA ID 22N CK it in Chinese H an nationality and to evaluate the forensic application. Methods B y detected 500 unrelated healthy individuals in Chinese H an nationality of East China w ith G oldeneyeTM DNA ID 22N CK it, allele frequencies, population genetics param eters and linkage disequilibrium inform ation of the 21 autosom al STR w ere statistically analyzed. Results In the 21 autosom al STR , no deviations from H ardy-W einberg equilibrium w ere detected and all loci w ere independent form each other. D P values of 21 au-tosom al STR w ere all above 0.85, and the com bined discrim ination pow er w as 1-3.616 5×10-26. Com bined m ean exclusion chance of this system in duo cases w as 1-2.786 81×10-6, in trio cases w as 1-8.545 82× 10-10. Conclusion Tw enty-one autosom al STR included in G oldeneyeTM DNA ID 22N CK it are highly polym orphic in the H an nationality. Com bined w ith G oldeneyeTM DNA ID 20A K it, the kit can satisfy the needs for full-sibling testing and facilitate the solution of this kind of case tools.

The authors compared the purpose,and the main content of three international standards in medical education developed by the Institute for International Medical Education (IIME), World Health Organization Western Pacific Regional Office (WHO/WPRO), and World Federation for Medical Education (WFME) respectively. The IIME's standard is deferent from the others. The IIME's standard contains seven broad educational outcome domains and 60 items in the domains. The purpose of IIME's standard is to improve the common core competency of individual medical graduates of each medical school in the world, and the standard focuses the outcome of medical education and belongs to summative individual evaluation. The WHO/WPRO's and WFME's standards are quite similar. They define the standards across nine broad areas of medical schooling divided into 38 sub-areas. The ultimate goal of the WHO/WPRO's standard is to encourage national governments to adopt a quality assurance process in medical education. The aim of the two standards is to promote the quality assurance of medical schools. Both of the two standards focus the whole process of medical schooling and medical schools, and belong to formative evaluation.

OBJECTIVE: To evaluate the protective effects of oral administration of D-methionine tablets on noise-induced hearing impairment. METHOD: Two hundred and three volunteers were recruited and randomly divided into two groups: experimental group (n= 113) and control group (n=90). The subjects received oral administration of D-methionine tablets in the experimental group and placebo in the control group before noise exposure. Routine audiometric evaluation and ABR testing were performed and recorded before and after noise exposure. The statistical analysis was carried out with SPSS 11.0. RESULT: There were no differences in auditory threshold and I-V interpeak latency pre-noise exposure (P>0.05), however, there were statistically significant differences between two groups 1 d, 7 d after noise exposure (P<0.01 and P<0.05). In-respective-group, there were statistically significant differences between before and 1 d after noise exposure (P<0.05 and P<0.01), however, no difference was noted between before and 7 d after noise exposure in the experimental group (P>0.05). CONCLUSION The protective effects of D-methionine tablets were prominent on the noise-induced hearing impairment. Further studies regarding the optimal time of D-methionine administration will be recommended in the future.
Administration, Oral ; Adult ; Hearing Loss, Noise-Induced ; drug therapy ; Humans ; Male ; Methionine ; therapeutic use ; Young Adult

Objective To analyze the clinical manifestations,treatment and prognosis of adult medulloblastoma (MB).Methods A total of 163 cases of adult MB,confirmed by surgical and pathological diagnosis,were retrospectively analyzed about the clinical manifestations,imaging,treatment and prognosis.There are 108 males and 55 females in the group,whose average age was 28.6-year-old.Results The main clinical manifestations include headache,nausea,vomiting,dizziness,gait disturbance,hypopsia,diplopia,hearing loss and cerebellum crisis.Gross total resection was achieved in 90 cases,subtotal resection in 67 cases and biopsy in 6 cases.Survival time from surgery to progression or death or the last date of follow-up were measured and estimated by the Kaplan-Meier method.Among a total of 160 follow-up patients with MB,postoperative overall survival time was from 7 to 170 months,median survival time was (127±6) months (95％ CI 115.3-138.68).The 5-year overall survival time of adult MB patients was 73.1％ (120/163).The log-rank test was used to compare the significance of the following prognostic variables.Among all clinical factors,patients undergoing the craniospinal irradiation had a significantly better survival rate than those without this treatment (44 months vs 34 months,x2 =8.712,P =0.003).Conclusion Good therapeutic effect of MB be achieved by adopting surgical resection with early enough craniospinal irradiation.Recurrence and metastasis are the two main factors for bad prognosis in adult MB.

Objective To detect differentially expressed genes between human normal skin and photoaging skin, and to investigate the molecular and biological mechanisms of human skin photoaging at transcriptional level. Methods Full-thickness skin specimens were obtained during full-face rhytidectomy from sun-exposed (anterior ear skin) and sun-protected (retroauricular skin) sites of 6 patients with facial photoaging from 2007 to 2008. Genomic microarray analysis was conducted to identify differentially expressed genes between the two groups of specimens followed by gene-cluster analysis. Results The normalization of microarray data showed that the number of differentially expressed genes was 2163 between skin samples from sun-exposed and sun-protected sites in one patient, significantly higher than that in the other 5 patients (less than 200);therefore, the data from the patient with 2163 differentially expressed genes were excluded from further analysis.Totally, 172 differentially expressed genes were identified with Beadarray chip, including 99 up-regulated genes and 73 down-regulated genes. Based on Genebank research, 118 functionally classified genes werefound, which were associated with a series of biological processes, including cell adhesion, receptor regulation,signal transduction, metabolism, and so on. Conclusions There are a lot of differentially expressed genes between human photoaging skin and normal skin. Rhytidectomy may be associated with the differential expression of skin photoaging-related genes.

Objective To investigate the association of SPRR2E gene and psoriasis vulgaris by sequencing the DNA of Chinese Han psoriatic families. Methods DNA was extracted from the peripheral blood cells of thirty-two Chinese psoriatic families. The sequence of the SPRR2E encoding region was measured by ABI377 DNA Sequencer. The linkage disequilibrium was assessed by extended transmission disequilibrium test (ETDT) and GENEHUNTER software. Results An A/G polymorphism at nucleotide 156 of the SPRR2E encoding region was identified. There were three genotypes, including AA, GG and AG. Although the single nucleotide polymorphism (SNP) did not change the encoding of amino acid, the single nucleotide polymorphism locus was associated with psoriasis vulgaris by the ETDT analyzing. The A-allele was found to be transmitted more frequently than that of the G-allele. GENEHUNTER analysis was concordant with the results of the ETDT. Conclusion A single nucleotide polymorphism (SNP) in SPRR2E gene encoding region is associated with psoriasis vulgaris in Han Chinese population.

Objective To investigate a new method which could not only avoid the extrusion of the silicon implant, but also be benefit for the reconstruction of nasal tip and alar during nasal augmen-tation procedure. Methods Folded lower lateral cartilage flap combined with silicon implant was ap-plied for nasal dorsal augmentation and reconstruction of nasal tip and alar with its unique character at the same time. Results 12 cases were all primary healing, without infection, extrusion of implant and other complications. One month after operation, the projection of nasal tip was increased, which had better delicate and definite shape, natural appearing tip adding contour and height to nasal tip, pleas-ant definition. Conclusions Folded lower lateral cartilage flap combined with silicon implant is an ef-fective method to decrease the incidence of extrusion, when we want to have a little over-projected na-sal tip with prosthesis. It is also helpful for reconstructing the nasal tip and alar with its unique char-acter.