• Asian Pacific Journal of Cancer Prevention
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• 제16권2호
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• pp.421-425
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• 2015

Background: This study was performed to evaluate the amplification of HER-2/neu in patients with melanoma. Materials and Methods: Amplification of HER-2/neu was evaluated in a group of patients with melanoma, referred to two referral centers in Tehran, using immunohistochemistry (IHC) and chromogenic in situ hybridization (CISH) techniques. Results: Forty patients with mean age $57.9{\pm}19.5years$ were enrolled in this study. The most frequent type of melanoma was acral, while lower limbs were the most frequent sites. The amplification of HER2/neu was negative in 97.5% of patients with IHC and in 100% of patients with CISH technique. Only one case (2.5%) shows weak positive staining (+2) in IHC method. Fifty five percent of melanoma was ulcerative, and the most common stages of tumors were stages 4b and 3b. More than 47% of cases were in Clark level III, while the mean of Breslow thickness was $3.56{\pm}2.87mm$. The stage of the case that showed weakly positive staining (2+) in IHC was 4b. Conclusions: The amplification of HER2/neu biomarker was negative in patients with melanoma, using both CISH and IHC techniques.

• Asian Pacific Journal of Cancer Prevention
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• 제13권11호
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• pp.5391-5397
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• 2012

Background: Neuroblastoma (NB), like most human cancers, is characterized by genomic instability, manifested at the chromosomal level as allelic gain, loss or rearrangement. Genetics methods, as well as conventional and molecular cytogenetics may provide valuable clues for the identification of target loci and successful search for major genes in neuroblastoma. We aimed to investigate AURKA and MYCN gene rearrangements and the chromosomal aberrations (CAs) to determine the prognosis of neuroblastoma. Methods: We performed cytogenetic analysis by G-banding in 25 cases [11 girls (44%) and 14 boys (66%)] and in 25 controls. Fluorescence in situ hybridization (FISH) with AURKA and MYCN gene probes was also used on interphase nuclei to screen for alterations. Results: Some 18.4% of patient cells exhibited CAs., with a significant difference between patient and control groups in the frequencies (P<0.0001). Some 72% of the cells had structural aberrations, and only 28% had numerical chnages in patients. Structural aberrations consisted of deletions, translocations, breaks and fragility in various chromosomes, 84% and 52% of the patients having deletions and translocations, respectively. Among these expressed CAs, there was a higher frequency at 1q21, 1q32, 2q21, 2q31, 2p24, 4q31, 9q11, 9q22, 13q14, 14q11.2, 14q24, and 15q22 in patients. 32% of the patients had chromosome breaks, most frequently in chromosomes 1, 2, 3, 4, 5, 8, 9, 11, 12, 19 and X. The number of cells with breaks and the genomic damage frequencies were higher in patients (p<0.001). Aneuploidies in chromosomes X, 22, 3, 17 and 18 were most frequently observed. Numerical chromosome abnormalities were distinctive in 10.7% of sex chromosomes. Fragile sites were observed in 16% of our patients. Conclusion: Our data confirmed that there is a close correlation between amplification of the two genes, amplification of MYCN possibly contributing significantly to the oncogenic properties of AURKA. The high frequencies of chromosomal aberrations and amplifications of AURKA and MYCN genes indicate prognostic value in children with neuroblastomas and may point to contributing factors in their development.

• Environmental Analysis Health and Toxicology
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• 제30권
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• pp.4.1-4.11
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• 2015

Objectives: This survey was designed to conduct the first nationwide dietary exposure assessment on hazardous substances including the intakes of functional food and herbal medicine. In this paper, we introduced the survey design and the results of the dietary exposure status and internal exposure levels of lead (Pb), cadmium (Cd), and mercury (Hg). Methods: We selected 4867 subjects of all ages throughout Korea. We conducted a food survey, dietary survey, biomonitoring, and health survey. Results: Pb and Cd were the highest (median value) in the seaweed ($94.2{\mu}g/kg$ for Pb; $594{\mu}g/kg$ for Cd), and Hg was the highest in the fish ($46.4{\mu}g/kg$). The dietary exposure level (median value) of Pb was $0.14{\mu}g/kg$ body weight (bw)/d, $0.18{\mu}g/kg$ bw/d for Cd, and $0.07{\mu}g/kg$ bw/d for Hg. Those with a blood Pb level of less than $5.00{\mu}g/dL$ (US Centers for Disease Control and Prevention, reference value for those 1 to 5 years of age) were 99.0% of all the subjects. Those with a blood Cd level with less than $0.30{\mu}g/L$ (German Federal Environmental Agency, reference value for non-smoking children) were 24.5%. For those with a blood Hg level with less than $5.00{\mu}g/L$ (human biomonitoring I, references value for children and adults, German Federal Environmental Agency) was 81.0 % of all the subjects. Conclusions: The main dietary exposure of heavy metals occurs through food consumed in a large quantity and high frequency. The blood Hg level and dietary exposure level of Hg were both higher than those in the European Union.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제5권1호
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• pp.1-10
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• 2002

목적: 소아기는 알코올이나 약물 등에 의한 자극이 거의 없는 시기로 H. pylori 감염의 자연 경과와 단기간의 영향을 연구하기에 적합한 시기이다. 최근 H. pylori 감염의 기전으로 중요시되고 있는 위상피세포 증식과 세포사에 대해 소아에서 알아보고자 하였다. 방법: 1996년 5월부터 2001년 6월까지 이화여자대학교 목동병원 소아과에서 소화기 증상으로 내시경을 시행하여 H. pylori 감염으로 진단된 58예와 감염 음성 40예를 대상으로 하였다. H. pylori 감염 양성은 조직학적으로 H. pylori 균이 관찰되고, CLO 검사와 ureC PCR이 전부 양성인 경우로 하였다. 위생검 조직에서 개정된 시드니 체계를 이용하여 조직 소견을 분석하고, proliferating cell nuclear antigen (PCNA) 발현으로 위 상피세포 증식의 정도를, in situ terminal deoxynucleotidyl transferasemediated dUTP nick-end labeling (TUNEL) 방법으로 세포사의 정도를 조사하였다. 결과: 1) H. pylori 감염 양성에서 다핵형 중성구의 활동성(P=0.000), 만성 염증(P=0.000), 상피손상(P=0.000), 림프여포(P=0.000)의 정도가 감염 음성에 비하여 유의하게 높았다. H. pylori 감염 양성에서 장형화생은 관찰되지 않았다. 2) H. pylori 감염 양성에서 세포 증식 지표는 $67.8{\pm}18.13$으로, 음성 $54.8{\pm}14.46$에 비하여 유의하게 높았다(P=0.000). 세포 증식 지표는 H. pylori 밀도가 증가할수록(r=0.277, P=0.007), 다핵형 중성구의 활동성이 증가할수 (r=0.280, P=0.007), 만성염증이 증가할수록(r=0.284, P=0.006) 증가하였다. 3) 세포사 지표는 H. pylori 감염 양성에서 $0.44{\pm}0.447$, 음성에서 $0.14{\pm}0.196$으로 감염 양성에서 음성보다 유의하게 높았다(P=0.000). 세포사 지표는 H. pylori 밀도가 증가할수록(r=0.472, P=0.000), 다핵형 중성구의 활동성이 증가할수록(r=0.370, P=0.001), 만성 염증이 증가할수록(r=0.483, P=0.000) 증가하였다. 4) 세포 증식 지표가 증가할수록 세포사 지표는 유의하게 증가하였다(r=0.353, P=0.003). 결론: H. pylori 감염 소아에서 세포 증식 지표와 세포사 지표가 유의하게 증가하였으며 상관성도 유의하였다. 이는 소아에서 위 상피세포 증식과 세포사가 H. pylori의 병인에 중요함을 시사하며, 앞으로 세포 증식과 세포사의 기전, 유발 요인 외에 다른 병독 인자와의 관련성에 대한 연구가 필요하리라 생각된다.

• Asian Pacific Journal of Cancer Prevention
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• 제17권5호
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• pp.2435-2438
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• 2016

Background: MiRNAs, small non coding RNAs, play a role in the regulation of hematopoiesis, with effects on cell growth, differentiation, and apoptosis. In addition, MiRNAs are thought to play an important role in tumorigenesis. The miR146a G>C polymorphism can lead to alteration of miR146 expression, which appears to be associated with development and progression of several cancers. This study aimed to investigate the association of the miRNA146a (rs2910164) G>C polymorphism and susceptibility to childhood acute lymphoblastic leukemia (ALL) and clinical outcomes. Materials and Methods: Totals of 100 childhood ALL patients and 200 healthy children were studied for miR146a polymorphisms using polymerase chain reaction-restriction fragment-length polymorphism (PCR-RFLP). Results: The frequency of the miR146a G allele in controls was 0.40 compared with 0.38 in ALL patients. There was no association between miRNA146a (rs2910164) G>C polymorphism and susceptibility to childhood ALL (OR=1.484, 95%CI=0.712-3.093, p=0.290). Moreover, the frequencies of miR146a (rs2910164) G>C polymorphism were not associated with demographic data and clinical outcomes in ALL cases. Conclusions: The miRNA146a polymorphism was not significantly associated with susceptibility to Thai childhood ALL or any clinico-pathological variables.

• Asian Pacific Journal of Cancer Prevention
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• 제17권8호
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• pp.3989-3995
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• 2016

Background: Childhood acute lymphoblastic leukemia (ALL) is a heterogeneous genetic disease and its etiology remains poorly understood. Recent genome wide association and replication studies have highlighted specific polymorphisms contributing to childhood ALL predispositions mostly in European populations. It is unclear if these observations generalize to other populations with a lower incidence of ALL. The current case-control study evaluated variants in ARID5B (rs7089424, rs10821936), IKZF1 (rs4132601) and CEBPE (rs2239633) genes, which appear most significantly associated with risk of developing childhood B-lineage ALL. Materials and Methods: Using TaqMan assays, genotyping was conducted for 162 de novo B-lineage ALL cases and 150 unrelated healthy controls in India. Appropriate statistical methods were applied. Results: Genotypic and allelic frequencies differed significantly between cases and controls at IKZF1-rs4132601 (p=0.039, p=0.015) and ARID5B-rs10821936 (p=0.028, p=0.026). Both rs10821936 (p=0.019; OR 0.67; 95% CI=0.47-0.94) and rs4132601 (p=0.018; OR 0.67; 95%CI 0.48-0.94) were associated with reduced disease risk. Moreover, gender-analysis revealed male-specific risk associations for rs10821936 (p=0.041 CT+CC) and rs4132601 (p=0.005 G allele). Further, ARID5B-rs7089424 and CEBPE-rs2239633 showed a trend towards decreased disease risk but without significance (p=0.073; p=0.73). Conclusions: Our findings provide the first evidence that SNPs ARID5B-rs10821936 and IKZF1-rs4132601 are associated with decreased B-lineage ALL susceptibility in Indian children. Understanding the effects of these variants in different ethnic groups is crucial as they may confer different risk of ALL within different populations.

• Pediatric Infection and Vaccine
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• 제19권3호
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• pp.162-167
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• 2012

RSV는 2세 미만의 소아에서 급성 하기도 감염으로 인한 입원의 주원인이다. 특히 미숙아, 선천성 심폐질환, 면역결핍이 동반된 경우 주요 위험군으로 알려져 있다. 고위험군의 소아에서 중증 RSV 감염의 경우 리바비린 흡입요법이 허가가 되어 있으나 고비용, 안전성 등의 문제로 국내 임상에서의 사용은 매우 제한적인 실정이다. 저자들은 8개월 여환이 급성 림프구성 백혈병으로 관해유도요법 항암치료 중 발생한 RSV 폐렴으로 기흉, 기종격동, 호흡부전이 동반된 중증 감염을 경험하였다. 정맥용 면역글로불린, 경구 리바비린 투여에 반응이 없어 리바비린 흡입 치료를 시행하였고, 이후 임상적 호전을 경험하였기에 보고하는 바이다.

• Clinical and Experimental Pediatrics
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• 제49권5호
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• pp.565-569
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• 2006

Rothmund-Thomson 증후군은 상염색체 열성질환으로 다형피부증(poikiloderma), 희박한 모발과 눈썹, 저신장, 골격계 이상, 유소년기 백내장과 악성종양의 위험이 높은 것으로 특징지어지는 증후군이다. 골격계의 이상은 RTS 환아의 68%에서 보고되었고 신체전반의 골격계 이형성으로 형성부전이나 기형으로 나타난다. 요골형성부전, 엄지손가락 저형성, 골감소증, 슬개골 저형성이나 슬개골 형성 부전 등이 보고되어 있다. 흔치 않은 증상으로는 말안장코와 삼각형의 얼굴 등이 보고되어있다. RTS에서 골육종을 포함한 악성종양의 발생빈도가 높고 면역학적 이상이 보고되어 있다. 피부종양이 가장 흔하며 상피세포암, 기저세포암, Bowen's disease 등이 있고 두 번째로는 육종이 흔하다. 저자들은 전신적으로 혈관확장 및 과색소침착을 보이는 다형 피부 소견과 함께 요골형성부전, 척골기형, 엄지손가락형성부전, 슬개골 형성부전의 골격계 기형이 있으면서 이후 좌측 경골에 골육종이 발생한 Rothmund-Thomson 증후군을 경험하였기에 보고하는 바이다.

• Communications for Statistical Applications and Methods
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• 제25권6호
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• pp.673-685
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• 2018

Procrustes analysis is a useful technique useful to measure, compare shape differences and estimate a mean shape for objects; however it is based on a least squares criterion and is affected by some outliers. Therefore, we propose two generalized Procrustes analysis methods based on M-estimation and least median of squares estimation that are resistant to object outliers. In addition, two algorithms are given for practical implementation. A simulation study and some examples are used to examine and compared the performances of the algorithms with the least square method. Moreover since these resistant GPA methods are available for higher dimensions, we need some methods to visualize the objects and mean shape effectively. Also since we have concentrated on resistant fitting methods without considering shape distributions, we wish to shape analysis not be sensitive to particular model.

• 대한소아치과학회지
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• 제26권1호
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• pp.146-150
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• 1999

치아발육시기의 항암치료는 치아에 영향을 줄 수 있으며 이에 대한 예상 및 적절한 치료계획수립이 필요하다. 본 증례에서 환자의 왜소치는 항암 화학요법과 관련되어 발생한 것으로 추정되며, 이에 대한 장기적 관찰 및 치료가 필요할 것으로 사료된다.