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MicroRNAs are a class of endogenous, non-coding small RNA, 18~24 nucleotides in length, that mediate the post-transcriptional regulation of gene expression. The high conservation, time-dependent and tissue specificity of microRNAs make it possible for forensic body fluid identification, individual age estimation, estimation of postmortem interval, toxicity analysis, and analysis of the cause of death. However, the limitation of the quantity of identified microRNAs and the uncertainty of the research methods also limit the application microRNA in forensic science from theoretical research to practical application.
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Objective To investigate the significance of a comprehensive test on the semen stain in the field of forensic evidence;Methods PSA tests performed on samples obtained supernatant and sediment STR genotyping by differential lysis method;Results Through STR testing,there are inconsistencies with the PSA test results in which 13 cases of false positive and false negative in 1 case.The supernatant was detected in two cases of male component,coeducational 9 cases;Conclusion PSA test strips there are some false positive and false negative rate,test isolated by the difference lysis supernatant can not only increase the success rate of the fine on the semen stain can also as a supplement to bring more valuable information for the semen stain.
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Objective To test the technical param eters of GlobalFiler?PC R A m plification K it for its ap-plication to forensic application value and to investigate the genetic polym orphism s. Methods The valida-tion w as conducted in sensitivity, m ixed sam ples, species specificity, adaptability, survivability, consistency, peak height balance and stability. The am plification and detection of the genom ic D N A from 373 unre-lated individuals from B eijing H an nationality w ere extracted by autom ation w orkstation. Results Global-Filer?PC R A m plification K it w as adaptive to som e m ixed, degraded and inhibited sam ples. The pow er of sensitivity and adaptability and peak height balance show ed w ell. The distributions of genotype fre-quencies for 21 STR loci in the population w ere all in accordance w ith H ardy-W einberg equilibrium (P>0.05). The PIC value of the 21 STR loci w as am ong 0.536 to 0.940; the H value w as am ong 0.558 to 0.933; the D P value w as am ong 0.783 to 0.992; the PE value w as am ong 0.243 to 0.874. Conclusion GlobalFiler?PC R A m plification K it is suitable for crim inal cases and D N A database in forensic practice. A nd 21 STR loci in B eijing H an nationality have high polym orphism , w hich have ap-plication value in forensic practice and population genetics.
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Objective To observe any rehabilitative effects of individualized exercise training in the treatment of rotator cuff injury in elite table tennis players.Methods Forty table tennis players from the Chinese National Team were studied.Twenty (the experimental group) had rotator cuff injuries and 20 without the injury formed the control group.An individualized rehabilitation treatment protocol was prepared for each of the players in the experimental group and implemented twice weekly for a total of 8 weeks.There was no intervention for the control group.Before and after the treatment,both groups were assessed using a questionnaire for disabilities of the arm,shoulder and hand (DASH),a motion assessment,and BIODEX isokinetic muscle testing.Results There were significant differences in average DASH scores between the two groups,with the experimental group scoring higher than the controls both before and after the treatment.Before the treatment,at angular velocities of 60°/s,180°/s and 300°/s the peak moments of the ER (external rotation,ER) and IR (internal rotation,IR) muscles and the ER/IR ratio were all lower in the experimental group than among the controls.However,after the treatment the performance of the experimental group had improved in all three tests.Conclusion The ER/IR ratio of the dominant shoulder of table tennis players with rotator cuff injury is lower than that of the players without the injury,but individualized rehabilitation treatment can effectively increase the ratio and help to improve their shoulder function.
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<p><b>OBJECTIVE</b>To investigate the risk factors for contact dermatitis in pig farm workers.</p><p><b>METHODS</b>The cross-sectional questionnaire survey and on-site survey were conducted in pig farms raising more than 50 pigs in a county of Fujian Province, China. The study subjects were grouped based on different factors. The incidence rate was compared between groups by statistical analysis.</p><p><b>RESULTS</b>Of 302 subjects, 70 (23.18%) had contact dermatitis. There was a significant difference in the prevalence of contact dermatitis between the subjects in direct contact with commercially available pannage and those in indirect contact (χ(2) = 14.552, P < 0.01). Region, season, farm scale, brand of pannage, and allergic history were not influential factors for contact dermatitis (P > 0.05 for all).</p><p><b>CONCLUSION</b>Direct contact with commercially available pannage is closely associated with contact dermatitis in pig farm workers.</p>
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Adolescent , Adult , Aged , Female , Humans , Male , Middle Aged , Young Adult , Agriculture , China , Epidemiology , Cross-Sectional Studies , Dermatitis, Contact , Epidemiology , Dermatitis, Occupational , Epidemiology , Prevalence , Risk Factors , Surveys and QuestionnairesABSTRACT
To investigate whether human umbilical cord plasma (HUP) can be used to culture human cord blood mesenchymal stem cells (HUCMSCs), we collected 20 surplus HUP. After being treated with salting out and diasysis, the HUP were used to culture HUCMSCs as 10% volume, and compared with fetal bovine serum (FBS). Morphological characteristics, growth curve and reproductive activity of HUCMSCs cells were observed. The concentration of bFGF and noggin secreted by HUCMSCs cultured with HUP and FBS medium were detected by ELISA. It was found that compared to FBS, the morphology, reproductive activity and characteristic of HUCMSCs cell cultured with HUP were not distinctively different from FBS. The concentration of bFGF in HUP group was significantly higher than that of FBS group, and the concentration of noggin was also different in the two groups. So we concluded that HUP could be used to culture HUCMSCs for a long-time, and the HUP mediumcoild could be more suitable for the culture of human embryonic stem cell (hESC).
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Animals , Cattle , Humans , Cell Culture Techniques , Cells, Cultured , Culture Media , Chemistry , Fetal Blood , Chemistry , Mesenchymal Stem Cells , Cell Biology , Plasma , Chemistry , Serum , ChemistryABSTRACT
Objective To analyze the correlation of interleukin(IL)-12B gene single nucleotide polymorphism(SNP)rs6887695 with clinical phenotypes(including age at onset,family history,clinical types,gender)of psoriasis vulgaris in Chinese Han population.Methods This study recruited 575 patients with psoriasis vulgaris and 1403 healthy controls.DNA samples were obtained from these subjects.PCR with Taqman fluorescent probe(ABI 7900 system)was performed to analyze the genotype of SNP rs6887695 in IL-12B gene.Statistical analysis was carried out by using the software SPSS 14.0,and Chi-square test was conducted to compare the frequency of the SNP rs6887695 genotypes and alleles between the patients and controls as well as between patients with different clinical phenotypes of psoriasis.Results The frequency of GG,GC and CC genotype of the SNP rs6887695 was 42.61％,45.39％ and 12.0％ respectively in the patients,compared to 34.42％,47.83％ and 17.75％ in the healthy controls(x2 =16.31,P ＜ 0.01);the frequency of G and C allele of the SNP rs6887695 was 65.30％ and 34.70％ respectively in the patients,compared to 58.34％ and 41.66％ respectively in the healthy controls(x2 =16.54,P＜0.01).Significant differences were observed in the distribution of genotypes and alleles of the SNP rs6887695 between patients with chronic plaque psoriasis(n =543)and those with acute guttate psoriasis(n =32,x2 =18.11,12.19,both P ＜ 0.01).Increased frequency of G allele and GG genotype of the SNP rs6887695 were noted in the patients with psoriasis vulgaris compared with the healthy controls,and in the patients with plaque psoriasis compared with those with guttate psoriasis.However,there was no statistical difference in the distribution of SNP rs6887695 genotypes or alleles between 540 patients with adult onset psoriasis and 35 patients with child onset psoriasis,between 102 patients with family history and 440 patients without family history,or between 341 male patients and 234 female patients(all P ＞ 0.05).Conclusions The IL-12B SNP rs6887695 may be associated with the susceptibility to psoriasis vulgaris in Chinese Han population,especially with the susceptibility to plaque psoriasis,but seems unassociated with the age at onset,family history or gender of patients.
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Objective To investigate the association of IL-23R and IL-12B polymorphisms with susceptibility to psoriasis in Chinese Han population. Methods Patients with psoriasis were recruited based on the diagnostic criteria. In the first phase of the study, three SNPs (rs6887695, rs11465817 and rs1343152)were genotyped in DNA samples from 217 unrelated patients with psoriasis as well as 288 control subjects by direct sequencing. The positive SNP rs6887695 was validated in a larger combined sample including 578 patients with psoriasis and 1422 human controls, by using Taqman fluorescent PCR. The data were assessed by Hardy-Weinberg equilibrium test, chi square test, haplotype analysis and logistic regression model analysis. Results There was a significant difference in the allele frequency of SNP rs6887695 ( OR = 1.33, 95% CI 1.03 - 1.73,P = 0.028) of IL-12B between patients and controls, but not in that of the other two SNPs, rs11465817 and rs1343152 of IL-23R (P > 0.05 ). Hardy-Weinberg test showed that there was a linkage disequilibrium between rs11465817 and rs1343152 SNPs (D' = 0.744, r2 = 0.281 ); further analysis revealed a risk haplotype for psoriasis (A-A: OR = 2.890, P = 0.0018) constructed with 2 risk alleles of rs11465817 and rs1343152. Conclusions The susceptibility to psoriasis seems to be associated with the SNP rs6887695 of IL-1B gene but not with the SNPs rs11465817 or rs1343152 of IL-23R gene in Chinese Han population. The A-A haplotype of rs11465817-rs1343152 in IL-23R gene may increase the risk of psoriasis in Chinese Han population.
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Objective To investigate the efficacy of autologous peripheral hematopoietic stem cell transplantation in the treatment of adult dermatomyositis. Methods A 21-year-old patient with dermatomyositis received autologous peripheral hematopoietic stem cell transplantation and was followed up for 6 years. Autologous peripheral hematopoietic stem cells were mobilized by recombinant human granulocyte colony stimulating factor (rhG-CSF) before the transplantation, and the conditioning regimens consisted of cyclophosphamide,methylprednisolone and cyclosporin. Rabbit anti-human T lymphocyte immunoglobulin began to be applied on day 3 after retransfer of stem cells. The improvement in symptoms, physical signs and biochemical indicators was observed, and hematopoietic restructuration and immunity resurrection were evaluated after the transplantation. Results After the transplantation, skin eruption greatly improved and gradually subsided. The muscle force of extremities restored from level Ⅳ before transplantation to level Ⅴ. The level of creatine kinase declined sharply after transplantation, but gradually returned to previous level. Leucocyte count began to decrease on the day of retransfer, and returned to the normal level on day 8. Immune function remained normal before and after the transplantation. Conclusion Autologous peripheral hematopoietic stem cell transplantation is an alternative treatment for severe and refractory dermatomyositis.
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Objective To study the responsible genes of psoriasis vulgaris on chromosome 1q21 in Chinese Han population.Methods Thirty-six families with psoriasis vulgaris,including 92 patients and 98 normal relatives,aged from 12 to 81 years with an average age at 44 years,were enrolled in this study.Blood samples were obtained from all the participants and subjected to DNA extraction.A genome scan was performed with eight microsatellites distributing over chromosome 1q21-1q23.1.Evidence for linkage disequilibrium was assessed with extended transmission disequilibrium test(ETDT)program and Genehunter software.Results Three short tandem repeat markers were found to be associated with psoriasis vulgaris.With Genehunter,evidence for linkage disequilibrium between D1S2345 and psoriasis was found with the NPL value being 1.735(P=0.0329).Moreover,ETDT revealed that the 97-bp allele of D1S2346 and 283-bp allele of D1S484 were preferentially delivered to affected descendants(P＜0.05).Conclusion Chromosome 1q21 contains genes associated with psoriasis vulgaris in Chinese Han population.
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Objective To investigate the correlation between the disease activity and the serum levels of anti-nuclear autoantibodies against various nuclear components in the patients with systemic lupus erythematosus (SLE). Methods Two hundred and twenty five SLE patients enrolled from 2000 to 2002 were evaluated retrospectively. All patients fulfilled the ACR 1997 diagnostic criteria for SLE. The patients were divided into three groups according to the disease activity: mild group (Group A), moderate group (Group B)and severe group (Group C), as assessed with SLEDAI score. These cases were also divided into 2 groups according to the serum levels of anti-dsDNA antibody. 52 out of 225 patients were followed up further. Results ①There was no correlation between the serum level of anti-dsDNA antibody and SLEDAI score, and between the serum level of ANA and SLEDAI score in 225 patients. ②The serum level of anti-dsDNA antibody in group C was higher than that in group A or group B (P 0.05). Conclusions A positive correlation between the anti-dsDNA antibody and the disease activity was found in the severe group of SLE, but not found in the mild or moderate group. Although the renal damage was more commonly seen in those with higher level of anti-dsDNA antibody, but there is no correlation between the level of anti-dsDNA antibody and the degree of renal lesion.
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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.
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In recent years, along with the in-depth research of Y-STRs, a lot of new loci are found and applied in forensic medicines. To solve some questions, the International Society of Forensic Genetics have published two guidance and recommendations successively concerning the Y-STRs in 2001 and 2005, which clarify contents regarding the term, the nomenclature principle of loci and alleles and the population genetics et al of Y-STRs. This report mainly describes the nomenclature principle of loci and alleles of Y-STRs.
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The dynamic changes of the contents of polyamines and excitatory amino acid in the hippocampus during cerebral ischemia and reperfusion were observed in rats.It was found that the content of putrescine was increased and the release of excitatory amino acid elevated during reperfusion,and the increase of putrescine could be stopped when the antagonist of NM-DA receptor of excitatory amino acid,that is,MK-801,was administered.These facts suggest that the metabolic disturbance of polyamines in closely related to the release of excitatory amino acid and modulated by NMDA receptors.The combination of polyamines with excitatory amino acid may play an important role in the ischemic damage of the brain.