OBJECTIVETo assess the association of vitamin D receptor gene (VDR) Apa I, Bsm I genotypes and allele frequencies and mild cognitive impairment (MCI) among elderly ethnic Uygurs from Xinjiang, China.

METHODSThe polymorphisms of the VDR genotypes (Apa I and Bsm I) were analyzed by the SNaPshot method in 124 MCI patients and 124 controls.

RESULTSFactors which can increase the risk for MCI have included the A allele of the Apa I polymorphism [OR=1.62, 95%CI(1.13-2.31)] and the AA genotype [OR=3.49, 95% CI(1.57-7.74)], the T allele of the Bsm I polymorphism [OR=1.94, 95%CI(1.24-3.05)], higher triglyceride and systolic blood pressure levels.

CONCLUSIONPolymorphisms of the VDR gene including the A allele and AA genotype of Apa I, and the T allele of Bsm I are probably associated with MCI among elderly ethnic Uygurs, and so are higher levels of triglyceride and systolic blood pressure.

Aged ; Alleles ; Asian Continental Ancestry Group ; genetics ; Binding Sites ; genetics ; Blood Pressure ; China ; Cognitive Dysfunction ; ethnology ; genetics ; psychology ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Diagnostic and Statistical Manual of Mental Disorders ; Ethnic Groups ; genetics ; Female ; Gene Frequency ; Genetic Predisposition to Disease ; ethnology ; genetics ; Genotype ; Humans ; Logistic Models ; Male ; Middle Aged ; Multivariate Analysis ; Polymorphism, Single Nucleotide ; Receptors, Calcitriol ; genetics ; Triglycerides ; blood

OBJECTIVETo investigate the single nucleotide polymorphisms (SNPs) at interleukin 6 (IL-6)-174 and TNF-β NcoI in Chinese Han children in Guangzhou, China and to provide basic information for study on the association between IL-6-174 and TNF-β NcoI polymorphisms and systemic inflammatory response syndrome (SIRS).

METHODSAllele-specific polymerase chain reaction and polymerase chain reaction-restriction fragment length polymorphism were used to determine the SNPs at IL-6-174 and TNF-β NcoI in 481 children selected from the Han population in Guangzhou in 2012. Genotype analysis and comparison with other populations were made with reference to relevant literature.

RESULTSChinese Han children in Guangzhou had only GG genotype at IL-6-174, and the SNP at this locus was rare or not seen in the Han population in Guangzhou. At TNF-β NcoI, the frequencies of TNF-β 1*1, TNF-β 1*2, and TNF-β 2*2 genotypes were 24.7%, 49.7%, and 25.6%, respectively. The sample distribution was in accordance with Hardy-Weinberg equilibrium. The TNF-β 1 allele frequency was significantly higher in Guangzhou Han population than in European and American white population (P<0.05).

CONCLUSIONSTNF-β NcoI SNP is prevalent in the Han population in Guangzhou, and the distribution of alleles is significantly different from that in the white population. The sample from an Hardy-Weinberg equilibrium population can be further used for study on the association between TNF-β NcoI SNP and SIRS in Chinese Han children in Guangzhou. IL-6-174 SNP is rare or not seen in the Han population in Guangzhou, so SNP at this locus cannot be selected for disease association analysis.

Asian Continental Ancestry Group ; genetics ; Child, Preschool ; China ; ethnology ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Female ; Gene Frequency ; Humans ; Interleukin-6 ; genetics ; Lymphotoxin-alpha ; genetics ; Male ; Polymorphism, Single Nucleotide ; Systemic Inflammatory Response Syndrome ; genetics

DraIII is a type IIP restriction endonucleases (REases) that recognizes and creates a double strand break within the gapped palindromic sequence CAC↑NNN↓GTG of double-stranded DNA (↑ indicates nicking on the bottom strand; ↓ indicates nicking on the top strand). However, wild type DraIII shows significant star activity. In this study, it was found that the prominent star site is CAT↑GTT↓GTG, consisting of a star 5' half (CAT) and a canonical 3' half (GTG). DraIII nicks the 3' canonical half site at a faster rate than the 5' star half site, in contrast to the similar rate with the canonical full site. The crystal structure of the DraIII protein was solved. It indicated, as supported by mutagenesis, that DraIII possesses a ββα-metal HNH active site. The structure revealed extensive intra-molecular interactions between the N-terminal domain and the C-terminal domain containing the HNH active site. Disruptions of these interactions through site-directed mutagenesis drastically increased cleavage fidelity. The understanding of fidelity mechanisms will enable generation of high fidelity REases.
Amino Acid Sequence ; Base Sequence ; Calorimetry, Differential Scanning ; Catalytic Domain ; Crystallography, X-Ray ; DNA ; metabolism ; DNA Cleavage ; Deoxyribonucleases, Type II Site-Specific ; chemistry ; genetics ; metabolism ; Escherichia coli ; metabolism ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Recombinant Proteins ; chemistry ; genetics ; metabolism ; Sequence Alignment ; Substrate Specificity

OBJECTIVETo optimize the performance of Pulsed-Field Gel Electrophoresis (PFGE) for the comparison of inter-laboratory results and information exchange of Borrelia burgdorferi subtyping.

METHODSA panel of 34 strains of B. burgdorferi were used to optimize PFGE for subtyping. In order to optimize the electrophoretic parameters (EPs), all 34 strains of B. burgdorferi were analyzed using four EPs, yielding different Simpson diversity index (D) values and the epidemiological concordance was also evaluated.

RESULTSThe EP of a switch time of 1 s to 25 s for 13 h and 1 s to 10 s for 6 h produced the highest D value and was declared to be optimal for MluI and SmaI PFGE of B. burgdorferi. MluI and SmaI were selected as the first and second restriction enzymes for PFGE subtyping of B. burgdorferi according to discrimination and consistency with epidemiological data.

CONCLUSIONPFGE can be used as a valuable test for routine genospecies identification of B. burgdorferi.

Animals ; Bacterial Proteins ; metabolism ; Bacterial Typing Techniques ; Borrelia burgdorferi ; classification ; genetics ; isolation & purification ; DNA, Bacterial ; metabolism ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Electrophoresis, Gel, Pulsed-Field ; Humans ; Ixodes ; Rats

Zinc finger nuclease (ZFN), which is a chimeric fusion structure between a Cys2-His2 zinc-finger protein (ZFP) and the cleavage domain of Fok I endonuclease, can be used to introduce targeted double-stranded breaks (DSBs). ZFN-mediated cleavage leads to mutations when double-stranded breaks are repaired by homologous recombination (HR) or nonhomologous end joining (NHEJ). In recent years, ZFNs are widely used in the fields of genetic research. In this review, the methodology and technical advantages of ZFNs were briefly discussed.
Animals ; Deoxyribonucleases, Type II Site-Specific ; chemistry ; genetics ; metabolism ; Humans ; Zinc Fingers

Adrenal Hyperplasia, Congenital ; genetics ; Chromatography, High Pressure Liquid ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Female ; Humans ; Point Mutation ; genetics ; Polymerase Chain Reaction ; methods ; Pregnancy

OBJECTIVETo assess the allele and genotype frequencies of the estrogen receptor alpha ( ESR alpha) Pvu II and Xba I polymorphisms in patients with severe preeclampsia and compare them with those of normal pregnant women.

METHODSBlood samples from 131 patients with severe preeclampsia and 223 normal pregnant women from Chinese Han in Chengdu area were analyzed, using PCR-RFLP method. Pregnant patients with blood pressure exceeding 140/90 mmHg (or 18.7/12 kPa) were recruited with a strict definition of preeclampsia. Genotyping was performed using PCR-RFLP for Pvu II and Xba I polymorphisms in the ESR alpha gene.

RESULTSThe T and C allele frequencies for Pvu II site were 0.580 and 0.420 in the patient group, and 0.576 and 0.424 in the controls, respectively. The A and G allele frequencies for Xba I site were 0.763 and 0.237 in the patient group, and 0.807 and 0.193 in control group, respectively. No significant difference in the allele frequencies of either site was observed between the two groups. However, the CC homozygotes or CT heterozygotes in the control pregnant women had higher systolic blood pressure levels than TT homozygotes for Pvu II site after the data was adjusted for age and BMI (114.00+/-21.44 mmHg or 114.33+/-1.21 mmHg vs. 108.62+/-1.91 mmHg, P<0.05). No genotype effect on the blood pressures was found for Pvu II site in the case group, nor for Xba I site in either group.

CONCLUSIONOur work has excluded the association of the ESRalpha Pvu II and Xb I polymorphism with severe preeclampsia in a Southwest Chinese population, although this polymorphism may be associated with the systolic blood pressure level in the normal pregnant women.

Adult ; Asian Continental Ancestry Group ; genetics ; Case-Control Studies ; China ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Estrogen Receptor alpha ; genetics ; Female ; Gene Frequency ; Genotype ; Humans ; Polymorphism, Genetic ; Pre-Eclampsia ; genetics ; pathology ; Pregnancy

OBJECTIVETo study the relationship between estrogen receptor beta gene (ER beta) polymorphism and unknown aetiology hypomenorrhea in Southwestern China .

METHODSOne hundred eumenorrhea women were chosen as control group and another 100 hypomenorrhea patients as case group from Southwestern China. Restriction fragment length polymorphism (RFLP) of the Rsa I and Alu I in ER beta gene was analysed. The ER beta gene polymorphism genotype distribution in case group and control group was compared.

RESULTSR allele frequency in case and control groups was 37.5% and 48.5% respectively, the OR was 0.64 (95%CI: 0.42-0.97), P= 0.026. A allele frequency in case and control groups was 18.0% and 11.5% respectively, the OR was 1.69 (95%CI: 0.93-3.09), P= 0.07. RFLP of Rsa I and Alu I in both groups were distributed with polymorphism.

CONCLUSIONERbeta gene polymorphism has a relation with unknown aetiological hypomenorrhea. R allele may be the guard factor, and A allele may be its risk factor.

Adult ; Binding Sites ; genetics ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Estrogen Receptor beta ; genetics ; Female ; Gene Frequency ; Genetic Predisposition to Disease ; genetics ; Genotype ; Humans ; Menstruation Disturbances ; etiology ; genetics ; Polymerase Chain Reaction ; Polymorphism, Genetic ; genetics ; Polymorphism, Restriction Fragment Length ; Young Adult

OBJECTIVETo explore the polymorphisms of vitamin D receptor (VDR) gene Tru I polymorphisms and the influence of this variation on Bsm I polymorphisms in Han nationality.

METHODSVenous blood samples from 80 healthy individuals of Han nationality were collected and genomic DNA was extracted, VDR Bsm I and Tru I were tested by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) to analyze the polymorphisms of VDR gene; After using another primers to test VDR Bsm I in the same samples, the consistence of each method was assessed.

RESULTSThe frequencies of the VDR Tru I genotype in the groups were: TT 68.7%, Tt 26.3%, tt 5.0%; VDR Bsm I were: BB 6.2%, Bb 52.5%, bb 41.3%; Both polymorphisms were under Hardy-Weinberg equilibrium. After using another pair of primer, the frequencies of Bsm I genotype were BB 20.0%, Bb 26.2%, bb 53.8%, 22 genotype Bb changed to genotype BB or genotype bb in comparison with the result of first detection.

CONCLUSIONThe VDR Tru I polymorphism is found in the Han nationality, the distribution of this site's polymorphism is different from that of other nationalities. The presence of Tru I variation can result in some allele of Bsm I genotype drop-out in some study.

Adult ; Aged ; Alleles ; Asian Continental Ancestry Group ; genetics ; China ; ethnology ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Ethnic Groups ; genetics ; Female ; Genotype ; Humans ; Male ; Middle Aged ; Polymorphism, Genetic ; Receptors, Calcitriol ; genetics

OBJECTIVETo provide DNA molecular marker for identification of Nelumbo nucifera by exploring the differences of nrDNA-ITS sequence of N. nucifera originated from different habitats.

METHODTo compare nrDNA-ITS base sequence using specific PCR-ITS.

RESULTThe completed sequence of ITS and 5.8 S rDNA, and the partial sequences of 18S rDNA and 26S rDNA, totally 750 bp, from N. nucifera were obtained. The differences among N. nucifera from different habitats and from different cultivars were found.

CONCLUSIONThe method can be used to identify N. nucifera among different species and to distinguish their fakes. It provided the basis for identifying N. nucifera from different geographical regions by comparison of their ITS sequences.

Base Sequence ; China ; DNA, Plant ; chemistry ; genetics ; metabolism ; DNA, Ribosomal Spacer ; classification ; genetics ; Deoxyribonuclease EcoRI ; metabolism ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Drug Contamination ; prevention & control ; Geography ; Nelumbo ; classification ; genetics ; Phylogeny ; Plants, Medicinal ; classification ; genetics ; Polymerase Chain Reaction ; RNA, Ribosomal ; genetics ; RNA, Ribosomal, 18S ; genetics ; RNA, Ribosomal, 5.8S ; genetics ; Sequence Analysis, DNA ; Species Specificity