• Animal cells and systems
• /
• 제7권2호
• /
• pp.145-149
• /
• 2003

Adult periodontitis is a chronic inflammatory disease whose etiology is not well defined. Recent studies have shown that vitamin D receptor gene has been a candidate for the susceptibility of adult periodontitis. The purpose of this study is to investigate the frequency of Taq I restriction fragment length polymorphism (RFLP) in the vitamin D receptor gene in nan periodontically healthy controls and 28 adult periodontitis patients. Taq I RFLP in the vitamin D receptor gene was detected by PCR amplification, followed by restriction enzyme digestion and 2％ agarose gel electrophoresis. There was no significant difference in the distribution of Taq I RFLP between healthy controls and adult periodontitis group (P > 0.05). Thus, Taq I RFLP in the vitamin D receptor gene may not confer the susceptibility to adult periodontitis in Korean population. However, t allele distributions of this RFLP showed various frequencies among ethnic groups studied. Further studies in other ethnic groups will be required.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권17호
• /
• pp.7413-7417
• /
• 2014

Background: Development of gastric cancer (GC) is a multistep process that requires alterations in the expression of oncogenes and tumor suppressor genes, occurring over several decades. The p53 tumor suppressor protein is involved in cell-cycle control, apoptosis and DNA repair. One of the most important regulators of p53 is MDM2, which acts as a negative regulator in the p53 pathway. Based on the key role of p53 and MDM2 in tumor suppression, polymorphisms that cause change in their function might affect cancer risk. We therefore elevated associations of the polymorphisms of p53 (R72P) and MDM2 (SNP309) with GC in Iran. Materials and Methods: A total of 104 patients with gastric cancer and 100 controls were recruited. Genomic DNA was extracted from fresh gastric samples. Genotyping of the p53 and MDM2 genes was performed using allele specific PCR (AS-PCR). Results: There was no significant difference between the p53 codon 72 polymorphism distribution in control and patient groups (p=0.54), but the G allele of MDM2 was found to be over-represented in patients (p=0. 01, Odds Ratio=2. 08, 95% Confidence Interval= 1.37-4.34). Conclusions: The p53 R72P seems not to be a potential risk factor for development of GC among Iranian patients, but our data suggest that MDM2 SNP309 might modify the risk related to GC.

• Clinical and Experimental Pediatrics
• /
• 제50권1호
• /
• pp.28-32
• /
• 2007

목 적 : ACE 유전자에 인트론 16의 287 bp 삽입(I) 혹은 결손(D)에 의한 다형성이 존재하고, 그 중 DD 유전형은 ACE 활성도가 높은 것으로 보고 되었으며 ID 다형성은 고혈압 또는 관상동맥 질환, 당뇨병성 신증, IgA 신장염 등 만성 신질환, 만성 B형 간염, 간경변증, 급성간염에서 위험인자로 알려졌다. 신생아 황달은 동아시아인이 서양인보다 2배 이상 높은 것으로 보여 유전적 연관성이 있을 것으로 사료되어 본 연구에서는 ACE 다형성과 한국인 신생아 황달과의 관계를 알아보고자 하였다. 방 법 : 혈중 빌리루빈 수치가 12 mg/dL 이상의 건강하고, 위험인자가 없는 만삭아 중 신생아 황달 환자 110명과 대조군 164명을 대상으로 하였다. 혈액을 0.5 cc를 채취하여 DNA를 분리하였고 ACE 유전자 다형성은 중합효소 연쇄반응을 이용하여 결정하였다. 1.5% agarose gel에서 전기 영동시켜 ethidium bromide로 염색한 후 유전자형을 확인하였다. 결 과 : ACE 유전자 다형성은 신생아 고빌리루빈혈증군 110명중 59명(53.6%)에서 DI 유전형을 보였고, 29명(26.4%)에서 II 유전형, 22명(20%)에서, DD 유전형을 나타냈다. 대조군 164명에서는 85명(51.8%)이 DI 유전형을 보였고, 40명(24.4%)에서 II 유전형을 보였으며, DD 유전형은 39명(23.4%)에서 나타났다. 대립유전자 빈도는 신생아 고빌리루빈혈증군에서 I 0.532, D 0.468의 분포를 보였고, 정상 대조군에서는 I 0.503, D 0.497로 비슷하였다. 결 론 : 한국 신생아에서 ACE 유전자 다형성은 DI 유전형이 많았으나, 대립유전자의 빈도는 차이가 없어 한국인 신생아 황달의 발생과 연관이 없었다.

• Asian Pacific Journal of Cancer Prevention
• /
• 제16권5호
• /
• pp.1997-2001
• /
• 2015

Objective: To clarify the association between the p53 polymorphism at codon 72 and susceptibility to the sporadic keratocystic odontogenic tumor (KCOT). Design: One hundred KCOTs and 160 match-group healthy controls were genotyped to ascertain the frequency of the p53 codon 72 polymorphism using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), confirmed by direct sequencing. Results: The frequencies of the Pro/Pro, Arg/Pro, and Arg/Arg genotypes were 23.8%, 49.4%, and 26.9%, respectively, in the controls, while the KCOT cohort demonstrated 43.0%, 39.0%, and 18.0%, respectively. Further analysis suggested that p53 Pro could be a KCOT-susceptible allele (OR (95%CI)=1.77 (1.22 to 2.59), p=0.0024), with a sex-adjusted OR (95%CI) of 1.71 (1.17-2.50), p=0.0046. Moreover, the results indicated that p53 codon 72 Pro homozygous was associated with a two-fold risk of developing KCOT (adjusted OR (95%CI) =2.17(1.23-3.84), p=0.0062). Conclusions: The C/C genotype of P53 gene codon 72 increases the risk of developing sporadic KCOT and may be a useful tool for screening and diagnostic purposes.

• IMMUNE NETWORK
• /
• 제2권4호
• /
• pp.248-255
• /
• 2002

Background: TAP1 and TAP2 are two ABC transporter genes located within the class II region of the human MHC. Their protein products form a heterodimer whose function is to transport peptides from the cytoplasm into the endoplasmic reticulum. This study was performed to examine the polymorphism of TAP genes and the distribution of HLA-TAP haplotypes in the Korean population through family analysis. Methods: The subjects used in this study were 50 healthy Korean families consisting of 233 individuals. TAP1 (codons 333 and 637) and TAP2 (codons 379, 565, 577, 651, 665, and 687) typings were carried out by the PCR-restriction fragment length polymorphism (RFLP) method. HLA-DRB1 and DQB1 genotyping results from a previous study were used for HLA-TAP haplotype analysis. Results: The number (gene frequency) of TAP1 and TAP2 alleles detected were 3 for TAP1 (A 81.5%, B 17.0%, and C 1.5%) and 8 for TAP2 (A1 32.0%, A2 12.5%, B 34.0%, Bky2 6.5%, C 7.0%, D 3.0%, E 4.5%, and G 0.5%). Eleven TAP1-TAP2 haplotypes were observed with $frequency{\geq}1%$, among which 4 haplotypes (A-B, B-A1, A-Bky2, and C-E) showed weak but significant positive linkage disequilibrium (P<0.05). When DRB1-DQB1 haplotypes were extended to TAP1 and TAP2 loci, much diversification of haplotypes was observed: 19 different DRB1-DQB1 haplotypes formed 58 different haplotypes extended to TAP1 and TAP2 loci. These results add more evidence to the view that recombination hotspot is present within and around TAP gene region. Conclusion: The allele frequencies of TAP1 and TAP2 genes and the distribution of TAP1-TAP2 and HLA-TAP haplotypes were studied in Koreans based on a family study.

• Asian-Australasian Journal of Animal Sciences
• /
• 제18권2호
• /
• pp.165-169
• /
• 2005

This study was performed to offer effective basic data for selection and improvement of Korean dairy cattle through identifying distributional properties among candidate genes (bovine butyrophilin, signal transducers and activators of transcription 5a, and prolactin hormone). In this study, polymorphisms of candidate genes were identified and the relationships between loci and production traits of each gene were analyzed using frozen semen of Holstein bulls (19 proven and 77 candidates). In butyrophilin (BTN) locus, polymorphisms information contents (PIC) value of BTN2 (0.372) was higher than those of others (BTN1; 0.155, BTN3; 0.254, BTN4; 0.169). As a result of analysis of genotyping STAT5a, using single stranded conformational polymorphism (SSCP) method and microsatellite locus, PIC values were 0.189 and 0.457, respectively. And PIC value of prolactin hormone gene was 0.176. In the relationships between genotypes and production traits, BTN3 was associated with 305-day production traits (p<0.05). PTAs for B allele were such as 110.43, 88.28 and 75.25 in BTN1, 3, 4 and these values were higher than those of A allele, but in the case of BTN2, A allele with 154.19 was higher than that of B allele. The results obtained from using candidate genes may be used as an useful index for the genetic improvement of dairy cattle population in Korea, and further studies are needed.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권22호
• /
• pp.9699-9706
• /
• 2014

Background: The predictive value of the xeroderma pigmentosum group D (XPD) Lys751Gln polymorphism regarding clinical outcomes of patients with colorectal cancer (CRC) receiving oxaliplatin-based chemotherapy has been evaluated in numerous published studies, but the results remain inconclusive. Therefore, we performed a meta-analysis to determine the precise role of the XPD Lys751Gln polymorphism in this clinical situation and optimize individual chemotherapy. Materials and Methods: A multiple search strategy was used to identify eligible studies. Pooled odds ratios (ORs), generalized odds ratio (ORG) and their 95% confidence intervals (CIs) were used to estimate the objective response, while hazard ratios (HRs) with 95%CIs were used for progression-free survival (PFS) and overall survival (OS). Results: A total of 17 studies including 2,286 patients met the inclusion criteria. Overall, the XPD 751Gln allele was associated with a non-significant reduced objective response to oxaliplatin-based chemotherapy in all patients or in the Asian and Caucasian subgroups. However, poor PFS and OS of CRC patients treated with oxaliplatin-based regimens were significantly related to the XPD 751Gln allele in the dominant model (PFS: HR=2.10, 95%CI: 1.65-2.67; OS: HR=3.18, 95%CI: 1.57-6.47). On stratified analysis by ethnicity, these relationships were more pronounced in Asians (PFS: HR=2.49, 95%CI: 1.79-3.47; OS: HR=5.25, 95%CI: 3.46-7.94) than in Caucasians (PFS: HR=1.73, 95%CI: 1.22-2.46; OS: HR=1.78, 95%CI: 1.06-2.99). Conclusions: The XPD Lys751Gln polymorphism may have prognostic value in patients with CRC undergoing oxaliplatin-based chemotherapy.

• Clinical and Experimental Pediatrics
• /
• 제48권4호
• /
• pp.380-386
• /
• 2005

목 적 : 신생아 황달은 백인에 비해 중국, 일본, 한국 등 동아시아인에서 2배 이상 많이 발생하는 것으로 보아 유전적 연관성이 있을 것으로 생각되어 왔고, 최근 일본인, 타이완 중국인, 한국인에서 UGT1A1 유전자의 Gly71Arg 다형성이 신생아 황달과 연관성이 있다고 보고되었다. 선천적으로 UDP-glucuronosyltransferase(UDPGT)에 결함이 있는 경우에는 부경로(alternative pathway)로 CYP1A2 효소를 자극하여 빌리루빈 대사가 이루어진다. 출생 후 6-14주가 되어야 성인 UDPGT 정상치에 도달하기 때문에 신생아 황달에서 빌리루빈 대사에 CYP1A2 부경로가 중요한 역할을 할 것으로 생각된다. 이에 저자들은 UGT1A1과 CYP1A2 유전자의 다형성이 한국인 신생아 황달의 발생과 어떤 연관성이 있는지 알아보고자 본 연구를 시행하였다. 방 법 : 혈중 빌리루빈 수치가 12 mg/dL 이상의 건강하고, 황달의 다른 위험인자가 없는 만삭아 79명과 대조군 68명으로부터 혈액 0.5 cc를 채취하여 DNA을 분리하였다. UGT1A1 유전자는 Polymerase chain reaction(PCR) 후에 염기서열 분석을 통해서 Gly71Arg 유전자 다형성을 확인하였으며, CYP1A2는 제한효소인 MboII를 이용하여 PCR-restriction fragment length polymorphism 방법과 염기서열 분석을 통해서 T2698G 유전자 다형성을 확인하였다. 결 과 : UGT1A1 유전자의 Gly71Arg 다형성은 변이형 대립 유전자 분포가 환자군에서 32%로 대조군 11%보다 높았다(P<0.0001). CYP1A2 유전자의 다형성은 변이형 유전형 분포가 환자군에서는 41.8%, 대조군에서 32.3%로 환자군이 높았으며 통계학적으로 유의하였다(P=0.015). 변이형 대립유전자의 빈도는 환자군에서 21%로 대조군 19%보다 높았으나 통계학적 유의성은 없었다(P=0.706). Gly71Arg와 T2698G의 변이형 발생의 연관성은 없었다(P=0.635). 결 론 : 한국인의 신생아 황달에서 체내의 빌리루빈 대사의 주경로와 부경로에 작용하는 효소의 유전자인 UGT1A1과 CYP1A2의 다형성이 확인되었고, UGT1A1 유전자의 Gly71Arg 다형성은 신생아 황달과 연관이 있었으나 CYP1A2 유전자의 T2698G 다형성은 신생아의 황달과 연관이 없었다.

• Journal of Periodontal and Implant Science
• /
• 제34권3호
• /
• pp.607-622
• /
• 2004

Recently epidemiologic studies have indicated that the patients with periodontitis may have increased risk of ischemic cardiovascular events, and have suggested the important roles of blood cytokines and acute reactant proteins in the systemic infection and inflammatory response. Periodontitis and coronary heart disease (CHD) may share the common risk factors and the genetic mechanism associated with interleukin(IL)-1A, B and RA genotype may be involved in the production of IL-1. This study was aimed to investigate the relationship between angiographically defined CHD and periodontitis as chronic Gram-negative bacterial infection and to determine whether the IL-1 gene polymorphism is associated in both diseases. Patients under the age of 60 who had undergone diagnostic coronary angiography were enrolled in this study. Subjects were classified as positive CHD (+CHD, n=37) with coronary artery stenosis more than 50% in at least one of major epicardial arteries, and negative CHD (-CHD, n=30) without significant stenosis. After recording the number of missing teeth, periodontal disease severity was measured by means of plaque index (PI), gingival index (GI), bleeding on probing (BOP), probing depth (PD), clinical attachment level (CAL), and radiographic bone loss around all remaining teeth. Gingival crevicular fluid (GCF) was collected from the 4 deepest periodontal pockets and assessed for cytokine ($IL-1{\beta}$, IL-6, IL-1ra, tumor necrosis $factor-{\alpha}$, and prostaglandin $E_2$). Additionally, blood CHD markers, lipid profile, and blood cytokines were analyzed. IL-1 gene cluster genotyping was performed by polymerase chain reaction and enzyme restriction using genomic DNA from buccal swab, and allele 2 frequencies of IL-1A(+4845), IL-1B(+3954), IL-B(-511), and IL-1RA(intron 2) were compared between groups. Even though there was no significant difference in the periodontal parameters between 2 groups, GCF level of $PGE_2$ was significantly higher in the +CHD group(p<0.05). Correlation analysis showed the positive relationship among PD, CAL and coronary artery stenosis(%) and blood $PGE_2$. There was also significant positive relationship between the periodontal parameters (PI, PD, CAL) and the blood CHD markers (leukocyte count, C-reactive protein, and lactic dehyrogenase). IL-1 gene genotyping showed that IL-1A(+3954) allele 2 frequency was significantly higher in the +CHD group compared with the -CHD group (15% vs. 3.3%, OR 5.118,p=0.043). These results suggested that periodontal inflammation is related to systemic blood cytokine and CHD markers, and contributes to cardiovascular disease via systemic inflammatory reaction. IL-1 gene polymorphism might have an influence on periodontal and coronary heart diseases in Korean patients.

• 생물정신의학
• /
• 제13권4호
• /
• pp.299-304
• /
• 2006

Objectives : The purpose of the present study was to investigate whether the TaqI A polymorphism of dopamine receptor D2 gene(DRD2) is associated with Tourette syndrome(TS) and chronic motor tic disorder(CMT) in Korean population. Methods : DRD2 TaqI A RFLP genotyping was carried out with DNA extracted from blood samples of 75 patients with tic disorders(47 with TS and 28 with CMT) and 90 healthy subjects. Genotype and allelic frequencies for the DRD2 gene polymorphisms of the tic disorder group as a whole were compared to those of the control group. Separating the TS group, thereafter, the frequency of genotypes and alleles were compared to those of the controls. Results : The results demonstrated that genotype and allele distributions for the DRD2 gene polymorphism in the tic disorder as a whole, TS, and control groups were not significantly different. Conclusion : No association was found for DRD2 gene, TS and CMT. The data suggest that DRD2 gene may not be a useful marker for the prediction of the susceptibility of tic disorder.