• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2006년도 Proceedings of The Convention
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• pp.13-19
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• 2006

• Toxicological Research
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• 제20권4호
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• pp.299-305
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• 2004

Adult periodontitis (AP) is a chronic inflammatory disease whose etiology is not well defined. Some studies suggested that the clinical characteristics of this disease may be in part explained by genetic factors, and some attempts to find genetic markers for this disease were successful. The interleukin-1 (IL-1) gene family as one of genetic factors may influence the expression of adult periodontitis. The aim of present study is to investigate the frequencies of genetic polymorphisms in the IL-1 gene family encoding three genes (IL-1A, IL-1B and IL-1RN) in Korean AP patients and periodontically healthy controls. There were no significant differences in genotype and allele frequencies of these polymorph isms between two groups, respectively. However, -511 polymorphism of IL-1 B gene was significantly associated with mean pocket depth (MPD, mm) value in AP patients (P<0.05). Therefore, our results suggest that -511 polymorphism in the IL-1B gene may be useful as a genetic marker for the severity of AP in Koreans.

• Animal cells and systems
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• 제13권3호
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• pp.305-314
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• 2009

The control region of mitochondrial DNA (13516-14619) is located between srRNA and $tRNA^{lle}$ gene in swimming crab, Portunus trituberculatus. The present study was investigated the genetic polymorph isms of the control region in samples of P. trituberculatus collected at coastal waters of the Yellow Sea in Korea. A total of 300 substitution and indel polymorphic sites were identified. In addition to SNPs and indel variation, a hypervariable microsatellite motif was also identified at position from 14358 to 14391, which exhibited 10 alleles including 53 different suballeles. When the hypervariable microsatellite motif was removed from the alignment, 95 haplotypes were identified (93 unique haplotypes). The nucleotide and haplotype diversities were ranged from 0.024 to 0.028 and from 0.952 to 1.000, respectively. The statistically significant evidence for geographical structure was not detected from the analyses of neighbor-joining tree and minimum-spanning network, neither. This result suggest that population of P. trituberculatus are capable of extensive gene flow among populations. We believed that the polymorph isms of the control region will be used for informative markers to study phylogenetic relationships of P. trituberculatus.

• Archives of Pharmacal Research
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• 제29권12호
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• pp.1132-1139
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• 2006

Single nucleotide polymorph isms (SNPs) in the MDR1 gene that are responsible for drug efflux can cause toxicity. Therefore, this study determined the SNPs of the Korean MDR1 gene, and analyzed the haplotypes and a linkage disequilibrium (LD) of the SNPs determined. The frequency of 9 SNPs from the MDR1 gene was determined by PCR-RFLP analyses of 100 to 500 healthy individuals. The frequcies of the SNPs were C3435T (47.7%), G2677T (37.6%), G2677A (4.4%), T1236C (21.7%), T129C (8%), A2956G (2.5%), T307C (1.5%), A41aG (9.2%), C145G (0%), and G4030C (0%). Analyses of the haplotype structure and an estimation of the LD of the combined polymorph isms demonstrated that the frequency of the 1236T-2677G-3435T haplotype is much higher in Koreans (14.1%) than in Chinese and western black Africans and the C3435T SNP in Koreans appears to have LD with T129C in Koreans for the first time. These results provide insight into the genetic variation of MDR1 in Koreans, and demonstrated the possibility of a new LD in this gene.

• Animal cells and systems
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• 제8권1호
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• pp.41-47
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• 2004

The kallikrein-kinin system affects regulation of blood pressure, and genes encoding for the components of this system have been considered as good candidates for hypertension. To evaluate the relationship between genetic polymorphisms of candidate genes involved in this system and hypertension, we performed case-control studies using genetic markers in Korean normotensives and hypertensives, respectively. By association study, there was a marginal association with hypertension in AA genotype distribution of A1789G polymorphism in the hKLK1 gene (P=0.0754). Thus, this genetic polymorphism may weakly contribute to the susceptibility to hypertension in Koreans. We also observed that significant linkage disequilibrium exists among three polymorphic sites in the hKLK1 gene studied, suggesting that the three genetic polymorph isms can be useful as genetic markers in clinical association studies. Further studies using larger sample sizes and more genetic markers will be needed to clarify genetic influence of kallikrein-kinin system for hypertension.

• 한국수산과학회지
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• 제29권6호
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• pp.761-769
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• 1996

The random amplified polymorphic DNA (RAPD) technique was used to characterize 18 reference strains of microalgae, mostly Chlorella species, collected from various localities around Korea peninsular. Eighteen strains consist of four genera of the family marine Chlorella from 12 samples, two genera of fresh water Chlorella from three samples, and three genera on Nannochloris. Twenty 10-mer anonymous primers were screened for amplification of genomic DNA extracted from samples using the CTAB extraction method. Nineteen of these oligonucleotide primers were positive or band producing. Three of 20 random primers (OPA 10, OPA 12, and OPA 18) resulted in both clear band and a high degree of reproducibility and showed some potential to be used to discriminate individual samples of both genetically hetero-and homogeneous populations, in determining phylogenetic relationships between species within a genus and developing individual fingerprints for each samples.

• Animal cells and systems
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• 제7권3호
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• pp.249-253
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• 2003

Abnormalities in fibrinolysis system is associated with risk of hypertension. In this report, the Alu repeat insertion/deletion (I/D) polymorphism of tissue plasminogen activator (t-PA) and the Hind III RFLP of plasminogen activator inhibitor-1 (PAI-1) genes were investigated in 115 normotensives and 83 patients with hypertension, and their association with anthropometrical data and plasma biochemical parameters were analyzed. There were no significant differences in the gene frequencies of the two candidate genes between normotensives and hypertensives, respectively. Our results indicate lack of associations between the two polymorph isms in t-PA and PAI-1 genes and risk of hypertension in the population under study. However, the Hind III RFLP of PAI-1 gene was significantly associated with plasma glucose level, suggesting its role in glucose metabolism. It needs to be tested whether this RFLP of PAI-1 gene is associated with insulin resistance syndrome or non-insulin dependent diabetes mellitus (NIDDM) in the Korean population.

• 한국전기전자재료학회논문지
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• 제17권4호
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• pp.410-414
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• 2004

High throughput analysis using a DNA chip microarray is powerful tool in the post genome era. Less labor-intensive and lower cost-performance is required. Thus, this paper aims to develop the multi-channel type label-free DNA chip and detect SNP (Single nucleotide polymorphisms). At first, we fabricated a high integrated type DNA chip array by lithography technology. Various probe DNAs were immobilized on the microelectrode array. We succeeded to discriminate of DNA hybridization between target DNA and mismatched DNA on microarray after immobilization of a various probe DNA and hybridization of label-free target DNA on the electrodes simultaneously. This method is based on redox of an electrochemical ligand.

• Archives of Pharmacal Research
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• 제26권6호
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• pp.482-486
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• 2003

Adult periodontitis is a multifactorial disease characterized by multple genetic and environmental factors. In view of the importance of interleukin-4 (IL-4) gene as a genetic factor for adult periodontitis, we investigated the relationship between two polymorphisms (-590 C $\rightarrow$ T polymorphism and 70 bp repeat polymorphism) of the human IL-4 gene and adult periodontitis in the Korean population. Genomic DNA was extracted from white blood cells of 32 adult periodontitis patients and 150 normal controls, respectively. There were no significant differences in the allele, genotype and haplotype distributions of two polymorph isms between normal controls and adult periodontitis group. Therefore, our results suggest that IL-4 gene locus contributes little to the interindividual susceptibility for adult periodontitis in Korean population.

• Radiation Oncology Journal
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• 제24권1호
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• pp.30-36
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• 2006

목적: 방사선치료와 항암제치료의 급성부작용은 환자 개인에 따라 차이가 많다는 것은 임상경험을 통하여 널리 알려져 있다. 그러나 아직 이를 미리 예측할 수 있는 인자로 알려진 것은 없다. XRCC1 유전자는 DNA base-excision repair에 관여하는 유전자로 알려져 있다 저자들은 대장 직장암 환자를 대상으로 방사선치료와 항암제치료로 인한 급성부작용과 XRCC1 유전자의 다형성이 관련이 있는지를 알아보고자 본 연구를 수행하게 되었다. 대상 및 방법: 1997년 7월부터 2003년 6월까지 인하대학교병원에서 치료를 받은 대장 직장암 환자 85명을 대상으로 하였다. 대장암이 2명, 5자결장암이 13명, 직장암이 71명이었다 병기는 B기가 22명, C기가 50명, D기가 8명이었고 절제 불가능한 경우가 6명이었다 방사선치료 범위는 골반강만 조사된 경우가 81명, extended field로 조사된 경우가 5명이었고 방사선량은 일일 1.8 Gy로 주 5회 조사하여 총 $30.6 Gy{\sim}59.4 Gy$ (중앙값: 54 Gy)를 조사하였다. 항암제치료는 전 환자에서 5FU를 근간으로 한 약제를 투여받았고 방사선 치료기간 중에 시행된 횟수는 1회가 24명, 2회가 45명이었고 17명은 동시에 투여 받지는 않았다. 치료의 급성부작용은 상부위장관과 하부위장관으로 나누어 기록하였고 증상이 전혀 없는 경우를 0, 증상이 있으나 투약이 필요하지 않은 경우를 1, 투약이 필요한 경우를 2, 투약에도 불구하고 증상이 심하여 치료의 휴식 또는 입원을 한 경우를 3으로 분류하였고 전 치료기간 중 최초, 최저 수치와 방사선치료기간 중 최초, 최저 백혈구, 혈소판 수치를 조사하였다. 환자의 동의 하에 혈액을 채취하여 림프구를 분리한 후 DNA를 추출하여 PCR-RFLP 방법으로 XRCC1 유전자의 코돈 194, 280, 399번 위치의 다형성을 분석하였다. 통계는 Chi-square, t-test, logistic regression, ANOVA를 사용하였다. 결과: 다변량 분석결과 상부위장관 부작용에 영향을 미치는 인자는 재발유무였고, 하부위장관의 부작용에 영향을 미치는 인자는 XRCC1 339 다형성, 방사선량, 방사선 중 항암제횟수 순이었다. 방사선 치료 중 백혈구 감소에 영향을 미치는 인자는 XRCC1 399 다형성, 194 다형성이었고, 혈소판 감소에 영향을 미치는 인자는 진단명, XRCC1 399 다형성이었다. 결론: 대장 직장암 환자에서 방사선치료와 항암제의 치료에 따른 정상조직의 급성부작용을 예측하는데 XRCC1 유전자의 코돈 399번의 다형성이 사용될 가능성이 있을 것으로 생각된다.