Eleonidas Moura Lima
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Eleonidas Moura Lima has a total of 68 co-authors. Here are the top co-authors by number of shared publications:
- Evaldo Hipólito de Oliveira
Universidade Federal do Piauí
4 shared publications - Leonardo Ferreira Soares
Universidade Estadual da Paraiba
4 shared publications - Rommel Mario Rodríguez Burbano
Federal University of Para
4 shared publications - Zhilbelly da Mota Nunes
Laboratory of Molecular Genetics (LAGEM), Department of Engineering and Environment, Federal, University of Paraiba, Rio Tinto, 58297-000 Paraiba, Brazil, Brazil
3 shared publications Cynthia Farias Vieira de Melo
Federal University of Paraíba UFPB
2 shared publications- João Ricardo Gonçalves de Oliveira
Universidade Federal da Paraíba, Brasil
2 shared publications
Latest Publications
- Open Access
- 1 November 2024
- Published by Brazilian Journals in REVISTA FOCO
- Vol. 17 (11) , e6689
RECEPTORES DE FATOR DE CRESCIMENTO EPIDÉRMICO (EGFR) E SEU PAPEL NO DESENVOLVIMENTO DE CARCINOMA BASOCELULAR (CBC)
O Carcinoma Basocelular (CBC) é o tipo de câncer de pele mais comum, originado a partir de células basais epiteliais que perdem suas funções normais de diferenciação e queratinização. Este estudo explorou a relação entre Variantes de Polimorfismo de Nucleotídeo Único (SNPs), especificamente rs121434569 e rs121434568, no gene do Receptor do Fator de Crescimento Epidérmico (EGFR), e sua associação com o desenvolvimento do CBC. Em um exame abrangente de 142 amostras de tecido parafinado de pacientes da Paraíba com diagnóstico histopatológico de CBC, as amostras foram submetidas à extração de DNA e PCR estendida específica para alelos. A análise revelou que as frequências genotípicas observadas dos SNPs estavam em desequilíbrio de Hardy-Weinberg, sendo o valor Qui-Quadrado para rs121434569 igual a 76,92 (P=0,001) e para rs121434568 igual a 11,56 (P=0,0054), indicando significância estatística com P<0,05. As observações confirmam que a expressão e a atividade alterada do EGFR, influenciadas pelas mutações pontuais nos SNPs investigados, desempenham um papel crucial na patogênese do CBC. O método utilizado conseguiu identificar com precisão os genótipos através das temperaturas de fusão específicas. Esta pesquisa ressalta a importância das alterações no EGFR, especialmente a mutação L858R, que causa ativação constitutiva do receptor, contribuindo para o crescimento celular descontrolado observado no CBC.
- 1 November 2024
- Published by Brazilian Journals in REVISTA FOCO
- Vol. 17 (11) , e6689
Open AccessRECEPTORES DE FATOR DE CRESCIMENTO EPIDÉRMICO (EGFR) E SEU PAPEL NO DESENVOLVIMENTO DE CARCINOMA BASOCELULAR (CBC)
O Carcinoma Basocelular (CBC) é o tipo de câncer de pele mais comum, originado a partir de células basais epiteliais que perdem suas funções normais de diferenciação e queratinização. Este estudo explorou a relação entre Variantes de Polimorfismo de Nucleotídeo Único (SNPs), especificamente rs121434569 e rs121434568, no gene do Receptor do Fator de Crescimento Epidérmico (EGFR), e sua associação com o desenvolvimento do CBC. Em um exame abrangente de 142 amostras de tecido parafinado de pacientes da Paraíba com diagnóstico histopatológico de CBC, as amostras foram submetidas à extração de DNA e PCR estendida específica para alelos. A análise revelou que as frequências genotípicas observadas dos SNPs estavam em desequilíbrio de Hardy-Weinberg, sendo o valor Qui-Quadrado para rs121434569 igual a 76,92 (P=0,001) e para rs121434568 igual a 11,56 (P=0,0054), indicando significância estatística com P<0,05. As observações confirmam que a expressão e a atividade alterada do EGFR, influenciadas pelas mutações pontuais nos SNPs investigados, desempenham um papel crucial na patogênese do CBC. O método utilizado conseguiu identificar com precisão os genótipos através das temperaturas de fusão específicas. Esta pesquisa ressalta a importância das alterações no EGFR, especialmente a mutação L858R, que causa ativação constitutiva do receptor, contribuindo para o crescimento celular descontrolado observado no CBC.
- Open Access
- 14 August 2024
- Published by MDPI AG in Preprints.org
Detection of Human Papillomavirus (HPV) and Bovine Leukemia Virus (BLV) in Breast Cancer Patients from Northeastern Brazil
This study evaluated the presence of Human Papillomavirus (HPV) and Bovine Leukemia Virus (BLV) DNA in breast cancer (BC) samples from women in Northeastern Brazil. We analyzed 186 formalin-fixed, paraffin-embedded tissue block samples using PCR and qPCR to detect HPV and BLV DNA. BLV DNA was not detected in any BC patients. However, HPV DNA was found in 46.2\% of the BC samples: 44.6\% were positive for HPV16, 3.5\% for HPV31, and 2\% were coinfected with HPV16 and HPV31. Additionally, we found an association between HPV-positive BC and Ki-67 expression (P=0.03, OR=1.85; CI=1.02-3.34), as well as between HPV31-positive BC and mitotic index (P=0.047). Although BLV was not detected in BC patients from Northeastern Brazil, the association between HPV and cell proliferation markers warrants further investigation, as HPV may contribute to the aggressiveness of BC in these patients.
- 14 August 2024
- Published by MDPI AG in Preprints.org
Open AccessDetection of Human Papillomavirus (HPV) and Bovine Leukemia Virus (BLV) in Breast Cancer Patients from Northeastern Brazil
This study evaluated the presence of Human Papillomavirus (HPV) and Bovine Leukemia Virus (BLV) DNA in breast cancer (BC) samples from women in Northeastern Brazil. We analyzed 186 formalin-fixed, paraffin-embedded tissue block samples using PCR and qPCR to detect HPV and BLV DNA. BLV DNA was not detected in any BC patients. However, HPV DNA was found in 46.2\% of the BC samples: 44.6\% were positive for HPV16, 3.5\% for HPV31, and 2\% were coinfected with HPV16 and HPV31. Additionally, we found an association between HPV-positive BC and Ki-67 expression (P=0.03, OR=1.85; CI=1.02-3.34), as well as between HPV31-positive BC and mitotic index (P=0.047). Although BLV was not detected in BC patients from Northeastern Brazil, the association between HPV and cell proliferation markers warrants further investigation, as HPV may contribute to the aggressiveness of BC in these patients.
- Open Access
- 31 October 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (11)
Hemoglobina variante na comunidade quilombola caiana dos crioulos no Estado da Paraíba, Brasil
Entre o grupo de indivíduos excluídos na sociedade brasileira, os mais marginalizados continuam ainda sendo os negros. Nesse grupo, os negros do meio rural são os mais alijados dos novos processos de construção social. A ONU declarou que as Comunidades Negras Rurais remanescentes de quilombos, denominados, quilombolas é hoje um dos mais ativos agentes sociais da população negra no Brasil. A produção de conhecimento científico é questão fundamental para a saúde da população negra para tanto se faz necessário incluir na Agenda Nacional de Prioridades em Pesquisa os temas vinculados à saúde desta população. Esta pesquisa objetivou apresentar a prevalência do traço falciforme em 1 comunidade quilombola no estado da Paraíba. Estudo do tipo transversal onde a população alvo foi de 76 membros em uma comunidade quilombola identificada no estado do Paraíba. A idade média foi de 31,4 anos. O sexo feminino foi 84,2% e masculino 15,8% da população. Foi detectada a presença de 4 casamentos consanguíneos entre as famílias estudadas. Tendo como base a elevada prevalência do traço falciforme (17,1%) na comunidade quilombola estudada, faz-se necessário e urgente a continuidade da pesquisa nas demais comunidades presentes no estado da Paraíba. Palavras-chave: Hemoglobinas variantes, Traço falciforme, anemia falciforme.
- 31 October 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (11)
Open AccessHemoglobina variante na comunidade quilombola caiana dos crioulos no Estado da Paraíba, Brasil
Entre o grupo de indivíduos excluídos na sociedade brasileira, os mais marginalizados continuam ainda sendo os negros. Nesse grupo, os negros do meio rural são os mais alijados dos novos processos de construção social. A ONU declarou que as Comunidades Negras Rurais remanescentes de quilombos, denominados, quilombolas é hoje um dos mais ativos agentes sociais da população negra no Brasil. A produção de conhecimento científico é questão fundamental para a saúde da população negra para tanto se faz necessário incluir na Agenda Nacional de Prioridades em Pesquisa os temas vinculados à saúde desta população. Esta pesquisa objetivou apresentar a prevalência do traço falciforme em 1 comunidade quilombola no estado da Paraíba. Estudo do tipo transversal onde a população alvo foi de 76 membros em uma comunidade quilombola identificada no estado do Paraíba. A idade média foi de 31,4 anos. O sexo feminino foi 84,2% e masculino 15,8% da população. Foi detectada a presença de 4 casamentos consanguíneos entre as famílias estudadas. Tendo como base a elevada prevalência do traço falciforme (17,1%) na comunidade quilombola estudada, faz-se necessário e urgente a continuidade da pesquisa nas demais comunidades presentes no estado da Paraíba. Palavras-chave: Hemoglobinas variantes, Traço falciforme, anemia falciforme.
- Open Access
- 7 August 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (9) , e368997007
Association of single nucleotide polymorphisms rs63751445 of the MSH2 gene and rs863224614 of the MSH6 gene with susceptibility to breast cancer in samples from Northeast Brazil
Breast cancer (BC) is the cancer with the greatest epidemiological impact on the female population worldwide. The disease has a multifactorial etiology, with genetic implications that are not fully understood. In this context, genetic changes in the mismatch repair mechanism are notable for their potential relationship with BC, especially the single nucleotide polymorphisms (SNPs), which are the most common type of genetic variation. The aim of this study was to evaluate for the first time the influence of the SNPs rs63751445 (A>G) of the MSH2 gene and rs863224614 (T>G) of the MSH6 gene for susceptibility to CM. For that, 100 samples obtained by histopathological examination of patients from the Northeast region of Brazil were used. The methodology used was the Didesoxy Single Allele Specific PCR (DSASP) method. Statistical analysis was performed by comparison with the control population (population in Hardy-Weinberg equilibrium) using Pearson's Chi-square and Fischer's exact tests. It was concluded that these two SNPs may be associated with susceptibility to BC in the studied population.
- 7 August 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (9) , e368997007
Open AccessAssociation of single nucleotide polymorphisms rs63751445 of the MSH2 gene and rs863224614 of the MSH6 gene with susceptibility to breast cancer in samples from Northeast Brazil
Breast cancer (BC) is the cancer with the greatest epidemiological impact on the female population worldwide. The disease has a multifactorial etiology, with genetic implications that are not fully understood. In this context, genetic changes in the mismatch repair mechanism are notable for their potential relationship with BC, especially the single nucleotide polymorphisms (SNPs), which are the most common type of genetic variation. The aim of this study was to evaluate for the first time the influence of the SNPs rs63751445 (A>G) of the MSH2 gene and rs863224614 (T>G) of the MSH6 gene for susceptibility to CM. For that, 100 samples obtained by histopathological examination of patients from the Northeast region of Brazil were used. The methodology used was the Didesoxy Single Allele Specific PCR (DSASP) method. Statistical analysis was performed by comparison with the control population (population in Hardy-Weinberg equilibrium) using Pearson's Chi-square and Fischer's exact tests. It was concluded that these two SNPs may be associated with susceptibility to BC in the studied population.
- Open Access
- 1 January 2020
- Published by EpiSmart Science Vector Ltd in Asian Pacific Journal of Cancer Prevention
- Vol. 21 (1) , 25-29
Association between SNPs and Loss of Methylation Site on the CpG island of the Promoter Region of the Smoothened Gene, Potential Molecular Markers for Susceptibility to the Development of Basal Cell Carcinoma in the Brazilian Population
Objective: Perform genotyping of SNPs in the promoter region of the SMO gene in BCC samples from patients from northeastern Brazil, and to determine if there is an association of these SNPs of the gene in question with the susceptibility to the development of the BCC. Methods: 100 samples of paraffined tissue from patients with histopathological diagnosis of BCC and 100 control samples were analyzed for each polymorphism by a newly developed genotyping method, the Dideoxy Single Allele Specific – PCR. The software Bioestat - version 5.3 and Haploview 4.2 were used for the statistical analysis. For all tests a P-value
- 1 January 2020
- Published by EpiSmart Science Vector Ltd in Asian Pacific Journal of Cancer Prevention
- Vol. 21 (1) , 25-29
Open AccessAssociation between SNPs and Loss of Methylation Site on the CpG island of the Promoter Region of the Smoothened Gene, Potential Molecular Markers for Susceptibility to the Development of Basal Cell Carcinoma in the Brazilian Population
Objective: Perform genotyping of SNPs in the promoter region of the SMO gene in BCC samples from patients from northeastern Brazil, and to determine if there is an association of these SNPs of the gene in question with the susceptibility to the development of the BCC. Methods: 100 samples of paraffined tissue from patients with histopathological diagnosis of BCC and 100 control samples were analyzed for each polymorphism by a newly developed genotyping method, the Dideoxy Single Allele Specific – PCR. The software Bioestat - version 5.3 and Haploview 4.2 were used for the statistical analysis. For all tests a P-value
- Open Access
- 1 January 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (2) , e73922091
Aspectos socioeconômicos e de condições de saúde em populações quilombolas no estado do Piauí, Brasil
Entre o grupo de indivíduos excluídos na sociedade brasileira, os mais marginalizados continuam ainda sendo os negros. Nesse grupo, os negros do meio rural são os mais alijados dos novos processos de construção social. O presente estudo objetivou analisar aspectos socioeconômicos e de saúde em comunidades quilombolas no Estado do Piauí. A pesquisa apresenta aspectos socioeconômicos e de saúde em 15 comunidades no Estado do Piauí. É um estudo exploratório, transversal de natureza qualitativa e quantitativa, onde a população alvo foi de 1.239 membros em 15 comunidades quilombolas identificadas no Estado do Piauí. A idade média foi de 30,1 anos, sendo o intervalo de idade entre 0 e 89 anos. O sexo feminino foi 55% , masculino 45% da população. Analfabetos eram 20%, enquanto 47,6% tinham o ensino fundamental incompleto. Renda de até dois salários mínimos eram 88,6%. Estudantes 27,9% e trabalhador rural 39,5% era a maioria da população. Das moradias, 74,1% apresentavam pouca ou nenhuma condição sanitária. O uso de plantas medicinais ocorreu em 32,5%. A não utilização de agrotóxicos foi relatada por 96,8% dos agricultores. Foi detectada a presença de casamentos consanguíneos entre 18,0% das famílias estudadas. A pesquisa indica a necessidade de políticas públicas voltadas para as características e necessidades destas populações.
- 1 January 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (2) , e73922091
Open AccessAspectos socioeconômicos e de condições de saúde em populações quilombolas no estado do Piauí, Brasil
Entre o grupo de indivíduos excluídos na sociedade brasileira, os mais marginalizados continuam ainda sendo os negros. Nesse grupo, os negros do meio rural são os mais alijados dos novos processos de construção social. O presente estudo objetivou analisar aspectos socioeconômicos e de saúde em comunidades quilombolas no Estado do Piauí. A pesquisa apresenta aspectos socioeconômicos e de saúde em 15 comunidades no Estado do Piauí. É um estudo exploratório, transversal de natureza qualitativa e quantitativa, onde a população alvo foi de 1.239 membros em 15 comunidades quilombolas identificadas no Estado do Piauí. A idade média foi de 30,1 anos, sendo o intervalo de idade entre 0 e 89 anos. O sexo feminino foi 55% , masculino 45% da população. Analfabetos eram 20%, enquanto 47,6% tinham o ensino fundamental incompleto. Renda de até dois salários mínimos eram 88,6%. Estudantes 27,9% e trabalhador rural 39,5% era a maioria da população. Das moradias, 74,1% apresentavam pouca ou nenhuma condição sanitária. O uso de plantas medicinais ocorreu em 32,5%. A não utilização de agrotóxicos foi relatada por 96,8% dos agricultores. Foi detectada a presença de casamentos consanguíneos entre 18,0% das famílias estudadas. A pesquisa indica a necessidade de políticas públicas voltadas para as características e necessidades destas populações.
- Open Access
- 1 January 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (2) , e98922113
Estudo da anemia falciforme através de jogos educativos em uma universidade pública no estado da Paraíba, Brasil
As hemoglobinas são macromoléculas responsáveis pelo processo de trocas gasosas no organismo humano. As hemoglobinopatias são doenças das hemoglobinas que acontecem devido a processos mutacionais nas cadeias globínicas. A anemia falciforme é a doença genética de maior prevalência no mundo, no Brasil a incidência e prevalência da doença é considerada um problema de saúde pública sendo o nordeste brasileiro a região de maior prevalência. Ainda desconhecida por grande parte da população e dos profissionais da saúde tem na educação em saúde o seu processo de disseminação do conhecimento. Considerando estes fatos, o presente estudo teve como objetivo identificar as intervenções lúdicas eficazes nessa prática, com vistas a subsidiar a reflexão e o aprimoramento do ensino nessa área. A elaboração dos jogos de xadrez, damas, jogo da velha e quebra cabeças composto com elementos inerentes a esta hemoglobinopatia, vem a propiciar aos alunos do curso de farmácia da Universidade Estadual da Paraíba, campus Campina Grande, o contato lúdico no aprendizado desta patologia, proporcionando a estimulação cognitiva no processo ensino/aprendizagem. Devido aos bons resultados obtidos, intenciona-se a utilização dos jogos em palestras escolares e no processo de educação de agentes e profissionais de saúde.
- 1 January 2020
- Published by Research, Society and Development in Research, Society and Development
- Vol. 9 (2) , e98922113
Open AccessEstudo da anemia falciforme através de jogos educativos em uma universidade pública no estado da Paraíba, Brasil
As hemoglobinas são macromoléculas responsáveis pelo processo de trocas gasosas no organismo humano. As hemoglobinopatias são doenças das hemoglobinas que acontecem devido a processos mutacionais nas cadeias globínicas. A anemia falciforme é a doença genética de maior prevalência no mundo, no Brasil a incidência e prevalência da doença é considerada um problema de saúde pública sendo o nordeste brasileiro a região de maior prevalência. Ainda desconhecida por grande parte da população e dos profissionais da saúde tem na educação em saúde o seu processo de disseminação do conhecimento. Considerando estes fatos, o presente estudo teve como objetivo identificar as intervenções lúdicas eficazes nessa prática, com vistas a subsidiar a reflexão e o aprimoramento do ensino nessa área. A elaboração dos jogos de xadrez, damas, jogo da velha e quebra cabeças composto com elementos inerentes a esta hemoglobinopatia, vem a propiciar aos alunos do curso de farmácia da Universidade Estadual da Paraíba, campus Campina Grande, o contato lúdico no aprendizado desta patologia, proporcionando a estimulação cognitiva no processo ensino/aprendizagem. Devido aos bons resultados obtidos, intenciona-se a utilização dos jogos em palestras escolares e no processo de educação de agentes e profissionais de saúde.
- 1 October 2018
- Published by SAGE Publications in OMICS: A Journal of Integrative Biology
- Vol. 22 (10) , 653-664
Differential Expression Profile of MicroRNAs During Prolonged Storage of Platelet Concentrates As a Quality Measurement Tool in Blood Banks
Platelet concentrate (PC) is a key blood component, which even in good storage conditions, susceptible to cellular damage over time. Hence, blood banks discard unused PC bags after 5 days of storage. Biomarkers of PC quality are therefore highly sought after in blood bank governance. We used the data (Gene Expression Omnibus: GSE61856) generated with next-generation sequencing to examine the expression profiles of microRNAs (miRNAs) from PCs that were stored for 6 days in a blood bank, that is, 1 day longer than is normally stored PC. We identified the 14 most differentially expressed miRNAs by comparing a control PC on the first day of storage with the PCs on each of the subsequent 5 days of storage from day 1 to 6. In all, we identified nine miRNAs with the downregulated profile (miR-145-5p, miR-150-5p, miR-183-5p, miR-26a-5p, miR-331-3p, miR-338-5p, miR-451a, miR-501-3p, and miR-99b-5p) and five upregulated miRNAs (miR-1304-3p, miR-411-5p, miR-432-5p, miR-668-3p, and miR-939-5p). These miRNAs were validated by real-time quantitative PCR in 100 PC units. As each PC unit is composed of platelets of five individuals, the validation was thus performed in 500 individuals (250 men and 250 women, comprised 18–40 years old adults). The data were analyzed with hierarchical clustering and principal component analysis, which revealed the variation of mean relative expression and the instability of miRNAs half-life on the fourth day of PC storage, which coincides with time of onset of platelet storage lesions. These new observations can usefully inform future decision-making and governance in blood banks concerning PC quality.
- 1 October 2018
- Published by SAGE Publications in OMICS: A Journal of Integrative Biology
- Vol. 22 (10) , 653-664
Differential Expression Profile of MicroRNAs During Prolonged Storage of Platelet Concentrates As a Quality Measurement Tool in Blood Banks
Platelet concentrate (PC) is a key blood component, which even in good storage conditions, susceptible to cellular damage over time. Hence, blood banks discard unused PC bags after 5 days of storage. Biomarkers of PC quality are therefore highly sought after in blood bank governance. We used the data (Gene Expression Omnibus: GSE61856) generated with next-generation sequencing to examine the expression profiles of microRNAs (miRNAs) from PCs that were stored for 6 days in a blood bank, that is, 1 day longer than is normally stored PC. We identified the 14 most differentially expressed miRNAs by comparing a control PC on the first day of storage with the PCs on each of the subsequent 5 days of storage from day 1 to 6. In all, we identified nine miRNAs with the downregulated profile (miR-145-5p, miR-150-5p, miR-183-5p, miR-26a-5p, miR-331-3p, miR-338-5p, miR-451a, miR-501-3p, and miR-99b-5p) and five upregulated miRNAs (miR-1304-3p, miR-411-5p, miR-432-5p, miR-668-3p, and miR-939-5p). These miRNAs were validated by real-time quantitative PCR in 100 PC units. As each PC unit is composed of platelets of five individuals, the validation was thus performed in 500 individuals (250 men and 250 women, comprised 18–40 years old adults). The data were analyzed with hierarchical clustering and principal component analysis, which revealed the variation of mean relative expression and the instability of miRNAs half-life on the fourth day of PC storage, which coincides with time of onset of platelet storage lesions. These new observations can usefully inform future decision-making and governance in blood banks concerning PC quality.
- Open Access
- 29 June 2016
- Published by Springer Nature in Molecular Cytogenetics
- Vol. 9 (1) , 1-7
Recurrent amplification of RTEL1 and ABCA13 and its synergistic effect associated with clinicopathological data of gastric adenocarcinoma
Despite progression in treatment of gastric cancer, prognosis of patients remains poor, in part due to the low rate of diagnosis during its early stages. This paradigm implies the necessity to identify molecular biomarkers for early gastric cancer diagnosis, as well as for disease monitoring, thus contributing to the development of new therapeutic approaches. In a previous study, performed by array-Comparative Genomic Hybridization, we described for the first time in literature recurrent amplification of RTEL1 and ABCA13 genes in gastric cancer. Thus, the aim of the present study was to validate recurrent amplification of RTEL1 and ABCA13 genes and associate CNV status with clinicopathological data. Results showed RTEL1 and ABCA13 amplification in 38 % of samples. Statistical analysis demonstrated that RTEL amplification is more common in older patients and more associated with intestinal type and ABCA13 amplification increases the risk of lymph node metastasis and is more common in men. Co-amplification of these genes showed a significant association with advanced staging. aCGH is a very useful tool for investigating novel genes associated with carcinogenesis and RTEL1 amplification may be important for the development of gastric cancer in older patients, besides being a probable event contributing for chromosomal instability in intestinal gastric carcinogenesis. ABCA13 amplification may have age-specific function and could be considered a useful marker for predicting lymph node metastasis in resected gastric cancer patients in early stage. Lastly, RTEL1 and ABCA13 synergistic effect may be considered as a putative marker for advanced staging in gastric cancer patients.
- 29 June 2016
- Published by Springer Nature in Molecular Cytogenetics
- Vol. 9 (1) , 1-7
Open AccessRecurrent amplification of RTEL1 and ABCA13 and its synergistic effect associated with clinicopathological data of gastric adenocarcinoma
Despite progression in treatment of gastric cancer, prognosis of patients remains poor, in part due to the low rate of diagnosis during its early stages. This paradigm implies the necessity to identify molecular biomarkers for early gastric cancer diagnosis, as well as for disease monitoring, thus contributing to the development of new therapeutic approaches. In a previous study, performed by array-Comparative Genomic Hybridization, we described for the first time in literature recurrent amplification of RTEL1 and ABCA13 genes in gastric cancer. Thus, the aim of the present study was to validate recurrent amplification of RTEL1 and ABCA13 genes and associate CNV status with clinicopathological data. Results showed RTEL1 and ABCA13 amplification in 38 % of samples. Statistical analysis demonstrated that RTEL amplification is more common in older patients and more associated with intestinal type and ABCA13 amplification increases the risk of lymph node metastasis and is more common in men. Co-amplification of these genes showed a significant association with advanced staging. aCGH is a very useful tool for investigating novel genes associated with carcinogenesis and RTEL1 amplification may be important for the development of gastric cancer in older patients, besides being a probable event contributing for chromosomal instability in intestinal gastric carcinogenesis. ABCA13 amplification may have age-specific function and could be considered a useful marker for predicting lymph node metastasis in resected gastric cancer patients in early stage. Lastly, RTEL1 and ABCA13 synergistic effect may be considered as a putative marker for advanced staging in gastric cancer patients.
- 23 January 2014
- Published by Springer Nature in Tumor Biology
- Vol. 35 (5) , 4983-4986
Association study of SNPs of genes IFNGR1 (rs137854905), GSTT1 (rs71748309), and GSTP1 (rs1695) in gastric cancer development in samples of patient in the northern and northeastern Brazil
Cancer is a multifactorial disease with a high mortality rate in Brazil and worldwide. Gastric cancer (GC) is considered the fourth type of malignancy more frequent in the population worldwide and the second leading cause of death. This work aimed to evaluate single nucleotide polymorphisms (SNPs) of IFNGR1, GSTT1, and GSTP1 genes samples in gastric cancer. We analyzed 60 samples of gastric cancer, 26 diffuse and 34 intestinal types, totaling 120 alleles for each SNP. The results were obtained by PCR and allele-specific PCR. Statistical analyzes performed using BioEstat 5.0 software, applying the Fisher’s exact test and chi-square. Only the SNP gene GSTP1 (rs1695) were significantly associated with gastric cancer in the samples analyzed (χ 2 = 8.73, P < 0.05). Our results suggest that the GSTP1 gene SNP (rs1695) can be considered a risk factor associated with gastric carcinogenesis.
- 23 January 2014
- Published by Springer Nature in Tumor Biology
- Vol. 35 (5) , 4983-4986
Association study of SNPs of genes IFNGR1 (rs137854905), GSTT1 (rs71748309), and GSTP1 (rs1695) in gastric cancer development in samples of patient in the northern and northeastern Brazil
Cancer is a multifactorial disease with a high mortality rate in Brazil and worldwide. Gastric cancer (GC) is considered the fourth type of malignancy more frequent in the population worldwide and the second leading cause of death. This work aimed to evaluate single nucleotide polymorphisms (SNPs) of IFNGR1, GSTT1, and GSTP1 genes samples in gastric cancer. We analyzed 60 samples of gastric cancer, 26 diffuse and 34 intestinal types, totaling 120 alleles for each SNP. The results were obtained by PCR and allele-specific PCR. Statistical analyzes performed using BioEstat 5.0 software, applying the Fisher’s exact test and chi-square. Only the SNP gene GSTP1 (rs1695) were significantly associated with gastric cancer in the samples analyzed (χ 2 = 8.73, P < 0.05). Our results suggest that the GSTP1 gene SNP (rs1695) can be considered a risk factor associated with gastric carcinogenesis.