• 제목/요약/키워드: p53SNP

검색결과 46건 처리시간 0.036초

한국인의 폐선암 돌연변이 핫스팟: TP53 P72R Single Nucleotide Polymorphism의 발암성 돌연변이 가능성 (Lung Adenocarcinoma Mutation Hotspot in Koreans: Oncogenic Mutation Potential of the TP53 P72R Single Nucleotide Polymorphism )

  • 백재하;조규봉
    • 대한임상검사과학회지
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    • 제55권2호
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    • pp.93-104
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    • 2023
  • 이전 연구에서 83명의 한국인 폐선암 환자의 차세대 염기서열 분석법(next generation sequencing, NGS) 분석 결과 돌연변이 빈도가 높은 상위 5개 유전자 TP53 (60%), EGFR (48%), KRAS (14%), PIK3CA (8%), CDKN2A (6%)를 확인했다. 본연구는 NGS 분석을 이용하여 최근 한국인의 폐선암에서 돌연변이 발생 빈도가 높은 상위 5개 유전자에 대한 돌연변이 핫스팟을 분석하여 폐선암을 유발하는 새로운 표지자를 확인하고자 했으며 가장 많은 돌연변이가 발생한 TP53 유전자의 돌연변이 유형과 패턴을 폐암의 주요 원인인 흡연과의 연관성을 분석했으며 TP53 P72R SNP가 발생한 폐선암 환자의 임상병리학적 특성을 분석하고자 했다. TP53, EGFR, KRAS, PIK3CA, CDKN2A의 돌연변이 핫스팟을 분석한 결과 이전에 보고된 결과와 일치했으나 TP53의 경우 약간의 차이를 나타냈다. TP53 돌연변이 핫스팟은 DBD에 집중하여 발생하는 점은 기존 연구 결과와 같았으나 코돈 72에서 발생하는 높은 돌연변이 빈도는 이전에 보고된 연구 결과와 다르게 나타났다. TP53 돌연변이가 발생한 폐선암 환자의 임상 특성을 분석한 결과 남성보다 여성, 흡연자보다 비흡연자에게 더 많이 발생했다. 또한, TP53 돌연변이 유형은 흡연 여부와 상관없이 전환의 비율이 가장 높았으며 전환 또는 결실 그리고 전환과 결실이 동시에 발생하는 비율이 전이의 발생 비율보다 높게 나타났다. 한국인의 폐선암 증례에서 흡연 여부와 상관없이 가장 발생 빈도가 높은 돌연변이 핫스팟은 TP53 코돈 72 뉴클레오타이드 염기가 C에서 G로의 전환되어 아미노산이 proline에서 arginine으로 치환되는 TP53 P72R SNP 발생 비율이 가장 높게 나타났다. TP53 P72R SNP가 발생한 폐선암 증례들의 임상병리학적 특성을 분석한 결과 환자의 연령, 성별, 흡연 유무 그리고 종양의 분화도와 유의한 상관관계를 보이지 않았지만 낮은 병기와 유의한 상관관계를 나타냈다(P-value=0.026). 본연구는 NGS를 통해 한국인의 폐선암에서 돌연변이 발생 빈도가 가장 많이 보고되었던 EGFR이 아닌 TP53의 증가를 확인했고 그중에서도 흡연 여부와 관계없이 TP53 P72R SNP의 발생 빈도가 가장 높음을 보고하는 바이다.

Effects of p53 Codon 72 and MDM2 SNP309 Polymorphisms on Gastric Cancer Risk among the Iranian Population

  • Moradi, Mohammad-Taher;Salehi, Zivar;Aminian, Keyvan;Yazdanbod, Abbas
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권17호
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    • pp.7413-7417
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    • 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.

MDM2 T309G has a Synergistic Effect with P21 ser31arg Single Nucleotide Polymorphisms on the Risk of Acute Myeloid Leukemia

  • Ebid, Gamal T.;Sedhom, Iman A.;El-Gammal, Mosaad M.;Moneer, Manar M.
    • Asian Pacific Journal of Cancer Prevention
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    • 제13권9호
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    • pp.4315-4320
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    • 2012
  • Background: The P53 tumor suppressor gene plays a pivotal role in maintaining cellular homeostasis by preventing the propagation of genome mutations. P53 in its transcriptionally active form is capable of activating distinct target genes that contribute to either apoptosis or growth arrest, like P21. However, the MDM2 gene is a major negative regulator of P53. Single nucleotide polymorphisms (SNP) in codon Arg72Pro of P53 results in impairment of the tumor suppressor activity of the gene. A similar effect is caused by a SNP in codon 31 of P21. In contrast, a SNP in position 309 of MDM2 results in increased expression due to substitution of thymine by guanine. All three polymorphisms have been associated with increased risk of tumorigenesis. Aim of the study: We aimed to study the prevalence of SNPs in the P53 pathway involving the three genes, P53, P21 and MDM2, among acute myeloid leukemia (AML) patients and to compare it to apparently normal healthy controls for assessment of impact on risk. Results: We found that the P21 ser31arg heterozygous polymorphism increases the risk of AML (P value=0.017, OR=2.946, 95% CI=1.216-7.134). Although the MDM2 309G allele was itself without affect, it showed a synergistic effect with P21 ser/arg polymorphism (P value=0.003, OR=6.807, 95% CI=1.909-24.629). However, the MDM2 309T allele abolish risk effect of the P21 polymorphic allele (P value=0.71). There is no significant association of P53 arg72pro polymorphism on the risk of AML. Conclusion: We suggest that SNPs in the P53 pathway, especially the P21 ser31arg polymorphism and combined polymorphisms especially the P21/MDM2 might be genetic susceptibility factors in the pathogenesis of AML.

Helicobacter pylori Infection and a P53 Codon 72 Single Nucleotide Polymorphism: a Reason for an Unexplained Asian Enigma

  • Pandey, Renu;Misra, Vatsala;Misra, Sri Prakash;Dwivedi, Manisha;Misra, Alok
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권21호
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    • pp.9171-9176
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    • 2014
  • Aim: P53, the most commonly mutated tumor suppressor gene in all types of human cancer, is involved in cell cycle arrest and control of apoptosis. Although p53 contains several polymorphic sites, the codon 72 polymorphism is by far more common. There are divergent reports but many studies suggest p53 pro/pro SNP may be associated with susceptibility to developing various cancers in different regions of the world. The present study aimed to find any correlation between H. pylori infection and progression of carcinogenesis, by studying apoptosis and the p53 gene in gastric biopsies from north Indian population. Materials and Methods: A total of 921 biopsies were collected and tested for prevalence of H. pylori by rapid urease test (RUT), imprint cytology and histology. Apoptosis was studied by the TUNEL method. Analysis of p53 gene polymorphism at codon 72 was accomplished by PCR using restriction enzyme BstU1. Observation: Out of 921 samples tested 56.7% (543) were H. pylori positive by the three techniques. The mean apoptotic index (AI) in the normal group was 2.12, while gastritis had the maximum 4.24 followed by gastric ulcer 2.28, gastropathy 2.22 and duodenal ulcer 2.08. Mean AI in cases with gastric cancer (1.72) was less than the normal group. The analysis of p53 72 SNP revealed that p53 (Arg/Arg), (Pro /Arg) variant are higher (40.59% & 33.66%) as compared to p53 pro/pro variant (25.74%) inthe healthy population. Conclusions: The North Indian population harbors Arg or Pro/Arg SNP that is capable of withstanding stress conditions; this may be the reason of low incidence of gastric disease in spite of high infection with H. pylori. There was no significant association with H. pylori infection and AI. However, there is increased apoptosis in gastritis which may occur independent of H. pylori or p53 polymorphism.

Prognostic Significance of TP53 Mutations and Single Nucleotide Polymorphisms in Acute Myeloid Leukemia: A case Series and Literature Review

  • Zeichner, Simon Blechman;Alghamdi, Sarah;Elhammady, Gina;Poppiti, Robert John;Castellano-Sanchez, Amilcar
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권4호
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    • pp.1603-1609
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    • 2014
  • Background: The response to treatment and overall survival (OS) of patients with acute myeloid leukemia (AML) is variable, with a median ranging from 6 months to 11.5 years. TP53 is associated with old age, chemotherapy resistance, and worse OS. Using genetic sequencing, we set out to look at our own experience with AML, and hypothesized that both TP53 mutations and SNPs at codon 72 would mimic the literature by occurring in a minority of patients, and conferring a worse OS. Materials and Methods: We performed a pilot study of randomly selected, newly diagnosed AML patients at Mount Sinai Medical Center, diagnosed from 2005-2008 (n=10). TP53 PCR sequencing was performed using DNA from bone marrow smears. Analysis was accomplished using Mutation Surveyor software with confirmation of the variants using the COSMIC and dbSNP databases. Results: Fewer than half of the patients harbored TP53 mutations (40%). There was no significant difference in OS based on gender, AML history, risk-stratified karyotype, or TP53 mutation. There were possible trends toward improved survival among patients less than 60 (11 vs 4 months, p=0.09), Hispanics (8 vs 1 months, p=0.11), and those not harboring SNP P72R (8 vs 2 months, p=0.10). There was a significant improvement in survival among patients with better performance status (28 vs 4 months, p=0.01) and those who did not have a complex karyotype (8 vs 1 months, p=0.03). The most commonly observed TP53 mutation was a missense N310K (40%) and the most commonly observed SNP was P72R (100.0%). Conclusions: Our study confirms previous reports that poor PS and the presence of a complex karyotype are associated with a decreased OS. In our cohort, TP53 mutations were relatively common, occurring more frequently in male patients with an adverse karyotype. Although there was no significant difference in survival between TP53 mutated and un-mutated patients, there was a possible trend toward worse OS among patients with SNP P72R. Larger studies are needed to validate these findings.

폐상피세포에서 Nitric Oxide (NO)에 의한 세포사에 관한 연구 (Characterization of Nitric Oxide (NO)-Induced Cell Death in Lung Epithelial Cells)

  • 용화심;김윤섭;박재석;지영구;이계영
    • Tuberculosis and Respiratory Diseases
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    • 제56권2호
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    • pp.187-197
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    • 2004
  • 연구배경 : Nitric Oxide(NO)는 매우 다양한 생물학적 조절기능을 수행하는 분자로서 심혈관계, 신경계, 면역기능 등에 관여함은 물론 최근 세포 사에도 직 간접적으로 영향을 미치고 있음이 알려져 있다. NO의 이렇게 복잡한 생물학적 기능 수행은 reactive oxygen species(ROS), metal ions 및 단백질 등과 복잡한 상호작용에 의한 것이며 NO가 나타내는 생물학적 효과는 용량-의존적이며, 세포-특이적이라고 밝혀져 있다. NO는 간세포 및 현관내피세포에서는 아포프토시스를 억제하지만 종양세포 및 신경세포 등에서는 아포프토시스를 유도하는 것으로 보고되고 있다. NO는 여러 호흡기질환의 병태생리에도 관여하는 것으로 알려져 있는바 천식과 같은 염증성 기도 질환에서 호기 NO가 증가되어있는 반면 흡연자나 일차성 폐 고혈압 환자에서는 감소되어 있다고 보고되고 있다. 이러한 배경에서 NO가 폐 상피 세포의 세포 사에 미치는 영향과 신호전달 경로를 밝히기 위하여 본 연구를 시행하였다. 방 법 : 폐 상피 세포로는 A549 세포 주를, NO donor로서는 SNAP (S-nitroso-N-acetyl-penicillamine)과 SNP(sodium nitroprusside)를 사용하였다. 세포 독성 검사는 crystal violet assay를 이용하였고 아포프토시스 assay는 Hoechst 33342와 propium iodide(PI) 이중 염색 후 형광현미경을 이용하여 핵의 형태학적변화를 관찰함으로써 괴사(necrosis)와 감별하였다. 철에 의한 NO 유도성 세포 사 억제 효과를 관찰하기 위하여 RBC와 FeSO4를 이용하였다. NO 유도성세포사의 신호전달 경로에 bcl-2와 p53이 미치는 영향을 평가하기 위하여 bcl-2 과 발현 세포 주 (A549-bcl-2)와 p53 knock out 세포 주 (A549-E6)를 대상으로 세포독성을 비교하였고 p53 활성화는 Western blot을 이용하여 확인하였다. 결 과 : A549 세포 주에서 SNAP과 SNP 모두 농도-의존적 세포독성을 관찰할 수 있었다. 아포프토시스 assay에서 SNAP은 저 농도에서는 아포프토시스를, 고농도에서는 괴사를 유도함을 관찰하였고 SNP는 농도에 상관없이 세포사가 괴사의 형태를 나타냄을 확인하였다. 이는 SNP가 순순한 NO donor가 아니라 cyanide에 의한 세포독성의 결과라고 생각되며 고농도의 SNAP에 의한 괴사 유도는 peroxynitrite 생성에 의한 결과임을 시사한다. SNAP에 의한 세포 사는 RBC와 FeSO4등 철에 의해 억제됨을 확인하였고 bcl-2에 의해서 억제되었으며 p53을 활성화시키고 p53 knock out에 의해 차단되었다. 결 론 : 폐상피세포에서 NO는 저 농도에서는 아포프토시스를 고농도에서는 괴사에 의한 세포 사를 유도하며 철이 중요한 억제제이며 bcl-2 및 p53이 신호전달 경로에 있어서 중요한 역할을 담당하는 것으로 생각된다.

P53 Arg72Pro and MDM2 SNP309 Polymorphisms Cooperate to Increase Lung Adenocarcinoma Risk in Chinese Female Non-smokers: A Case Control Study

  • Ren, Yang-Wu;Yin, Zhi-Hua;Wan, Yan;Guan, Peng;Wu, Wei;Li, Xue-Lian;Zhou, Bao-Sen
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권9호
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    • pp.5415-5420
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    • 2013
  • Background: Cell cycle deregulation is a major component of carcinogenesis. The p53 tumor suppressor gene plays an important role in regulating cell cycle arrest, and mouse double minute 2 (MDM2) is a key regulator of p53 activity and degradation. Abnormal expression of p53 and MDM2 occurs in various cancers including lung cancer. Methods: We investigated the distribution of the p53 Arg72Pro (rs1042522) and MDM2 SNP309 (rs2279744) genotypes in patients and healthy control subjects to assess whether these single nucleotide polymorphisms (SNPs) are associated with an increased risk of lung adenocarcinomas in Chinese female non-smokers. Genotypes of 764 patients and 983 healthy controls were determined using the TaqMan SNP genotyping assay. Results: The p53 Pro/Pro genotype (adjusted OR = 1.55, 95% CI = 1.17-2.06) significantly correlated with an increased risk of lung adenocarcinoma, compared with the Arg/Arg genotype. An increased risk was also noted for MDM2 GG genotype (adjusted OR = 1.68, 95% CI = 1.27-2.21) compared with the TT genotype. Combined p53 Pro/Pro and MDM2 GG genotypes (adjusted OR = 2.66, 95% CI = 1.54-4.60) had a supermultiplicative interaction with respect to lung adenocarcinoma risk. We also found that cooking oil fumes, fuel smoke, and passive smoking may increase the risk of lung adenocarcinomas in Chinese female non-smokers who carry p53 or MDM2 mutant alleles. Conclusions: P53 Arg72Pro and MDM2 SNP309 polymorphisms, either alone or in combination, are associated with an increased lung adenocarcinoma risk in Chinese female non-smokers.

한우 14번 염색체 QTL 영역내 Fatty acid binding protein 5 유전자의 다형성과 도체 및 육질 형질과의 관련성 분석 (Association between the Polymorphism of the Fatty acid binding protein 5 (FABP5) Gene within the BTA 14 QTL Region and Carcass/Meat Quality Traits in Hanwoo)

  • 허강녕;김남국;이승환;김남영;전진태;박응우;오성종;김태헌;성환후;윤두학
    • Journal of Animal Science and Technology
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    • 제53권4호
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    • pp.311-317
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    • 2011
  • 본 연구는 한우에서 소 염색체 14번(BTA14)에서 근내지방도 및 도체중과 관련성이 보고된 QTL영역(48-58cM) 내의 FABP5 유전자를 대상으로 SNP를 발굴하고 도체형질과의 관련성 분석을 위하여 수행하였다. PCR 및 염기서열결정법을 통해 FABP5 유전자내 4개의 SNP (-1141A>G, 949A>G, 969A>G, 1085C>G)를 발굴하였고, 이중 promoter 영역에 위치하는 SNP의 경우 미 보고된 신규 SNP로 확인되었다. 발굴된 4개의 SNP를 대상으로 표현형 기록치를 보유한 후대검정후 583두에 대하여 유전자형 분석 및 관련성 분석을 수행하였다. 분석 결과 4개의 SNP중 SNP1(-1141A>G)은 근내지방도에 있어서 G유전자형이 A유전자형에 비해서 근내지방도가 2.2 정도 높았고, SNP2 (949A>G)는 배최장근 단면적에 있어서 G유전자형이 A유전자형보다 배장근단면적에 있어서 3 $cm^2$ 만큼 높은 효과를 보였다. 본 결과에 대해 추후 지속적인 연구가 요구되어지며, FABP5의 SNPs은 한우의 도체 및 육질 관련 형질을 위한 유전자 마커로서 활용 가능할 수 있을 것으로 사료된다.

한우 Exostosin-1 유전자의 SNP 탐색 및 경제형질 관련성 분석 (Association Study Between the Polymorphisms of Exostosin-1 Gene and Economic Traits in Hanwoo)

  • 김범수;김남국;이승환;조용민;허강녕;박응우;양부근;윤두학
    • Journal of Animal Science and Technology
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    • 제53권1호
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    • pp.7-13
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    • 2011
  • 본 연구는 한우의 경제형질 관련 유전적 표지인자(DNA marker) 개발을 목적으로 EXT1 유전자의 다형성과 발현양상을 관찰하여 경제형질과의 관련성을 확인하고자 수행하였다. PCRdirect sequencing을 통하여 4개(T272196A, C272359T, G290964A 및 A302092G)의 SNPs를 탐색 하였으며, 탐색된 SNPs를 통하여 PCR-RFLP 기법으로 유전자형을 결정한 후 경제형질과 관련성을 분석하였다. 그 결과 T272196A 좌위에서 근내지방 육종가(p=0.014), G290964A 좌위에서 등지방두께 육종가 추정치(p=0.001), A302092G 좌위에서는 등지방두께 육종가(p < 0.001) 및 등심단면적 육종가(p=0.020)에서 각각 유의적인 연관성이 인정되었다. 따라서, 본 연구를 통해 확인된 SNP를 이용하여 한우의 선발에 활용 가능할 것으로 사료된다.

Association of rs1042522 Polymorphism with Increased Risk of Prostate Adenocarcinoma in the Pakistani Population and its HuGE Review

  • Khan, Mohammad Haroon;Rashid, Hamid;Mansoor, Qaiser;Hameed, Abdul;Ismail, Muhammad
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권9호
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    • pp.3973-3980
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    • 2014
  • Prostate adenocarcinoma is one of the leading causes of cancer related mortality in men but still limited knowledge is available about its associated functional SNPs including rs1042522 (Pro72Arg). The present study was undertaken to explore the association of this SNP with susceptibility to prostate adenocarcinoma along with its structural and functional impacts in the Pakistani population in a case-control study. Three-dimensional structure of human TP53 with Pro72Arg polymorphism was predicted through homology modeling, refined and validated for detailed structure-based assessment. We also carried out a HuGE review of the previous available data for this polymorphism. Different genetic models were used to evaluate the genotypes association with the increased risk of PCa (Allelic contrast: OR=0.0.34, 95%CI 0.24-0.50, p=0.000; GG vs CC: OR=0.17, 95%CI 0.08-0.38, p=0.000; Homozygous: OR=0.08, 95%CI 0.04-0.15, p=0.000; GC vs CC: OR=2.14, 95%CI 1.01-4.51, p=0.046; Recessive model: OR=0.10, 95%CI 0.05-0.18, p=0.000; Log Additive: OR=3.54, 95%CI 2.13-5.89, p=0.000) except the Dominant model (OR=0.77, 95%CI 0.39-1.52, p=0.46). Structure and functional analysis revealed that the SNP in the proline rich domain is responsible for interaction with HRMT1L2 and WWOX. In conclusion, it was observed that the Arg coding G allele is highly associated with increased risk of prostate adenocarcinoma in the Pakistani population (p=0.000).