99 results on '"Ramos, Ester Silveira"'
Search Results
2. Global genomic methylation related to the degree of parasitism in cattle
- Author
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de Soutello, Ricardo Velludo Gomes, Rodrigues, Maria Gabriela Fontanetti, Gonçalves, Juliana Alencar, Bello, Hornblenda Joaquina Silva, Pavan, Bruno Ettore, and Ramos, Ester Silveira
- Published
- 2022
- Full Text
- View/download PDF
3. Integrative network analysis of differentially methylated regions to study the impact of gestational weight gain on maternal metabolism and fetal-neonatal growth
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Argentato, Perla Pizzi, primary, Guerra, João Victor da Silva, additional, Luzia, Liania Alves, additional, Ramos, Ester Silveira, additional, Maschietto, Mariana, additional, and Rondó, Patrícia Helen de Carvalho, additional
- Published
- 2024
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- View/download PDF
4. Excessive Gestational Weight Gain Alters DNA Methylation and Influences Foetal and Neonatal Body Composition
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Argentato, Perla Pizzi, primary, Guerra, João Victor da Silva, additional, Luzia, Liania Alves, additional, Ramos, Ester Silveira, additional, Maschietto, Mariana, additional, and Rondó, Patrícia Helen de Carvalho, additional
- Published
- 2023
- Full Text
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5. Epigenetics and dental enamel development: a scoping review / Epigenética e desenvolvimento do esmalte dentário: uma revisão de escopo
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Torres, Carolina Paes, primary, Pion, Luciana Antonio, additional, Saraiva, João Guilherme, additional, Küchler, Erika Calvano, additional, Antunes, Livia Azeredo Alves, additional, De Queiroz, Alexandra Mussolino, additional, Dibb, Regina Guenka Palma, additional, and Ramos, Ester Silveira, additional
- Published
- 2022
- Full Text
- View/download PDF
6. Influence of genome methylation of fig tree accessions on the natural nematode and rust incidence
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Rodrigues, Maria Gabriela Fontanetti, primary, Firmino, Ana Carolina, additional, Valentim, Juliano Jorge, additional, Pavan, Bruno Ettore, additional, Ferreira, Antonio Flávio Arruda, additional, Monteiro, Laís Naiara Honorato, additional, Martins, Maria Eugênia Silva, additional, Ramos, Ester Silveira, additional, and de Soutello, Ricardo Velludo Gomes, additional
- Published
- 2021
- Full Text
- View/download PDF
7. Generation of Primordial Germ Cell-like Cells from iPSCs Derived from Turner Syndrome Patients
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de Souza, Aline Fernanda, primary, Bressan, Fabiana Fernandes, additional, Pieri, Naira Caroline Godoy, additional, Botigelli, Ramon Cesar, additional, Revay, Tamas, additional, Haddad, Simone Kashima, additional, Covas, Dimas Tadeu, additional, Ramos, Ester Silveira, additional, King, Willian Allan, additional, and Meirelles, Flavio Vieira, additional
- Published
- 2021
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8. Expression of candidate genes for residual feed intake in tropically adapted Bos taurus and Bos indicus bulls under thermoneutral and heat stress environmental conditions
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Pires, Bianca Vilela, primary, Stafuzza, Nedenia Bonvino, additional, de Freitas, Luara Afonso, additional, Mercadante, Maria Eugênia Zerlotti, additional, Ramos, Ester Silveira, additional, and Paz, Claudia Cristina Paro, additional
- Published
- 2021
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9. Growth Hormone (GH) Pharmacogenetics in Patients with Turner Syndrome: The Interactive Effect of a Polymorphism in the IGF-Binding Protein-3 (IGFBP-3) Promoter Region with the GHR-Exon3 Variants on Treatment Outcomes
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Braz, Adriana Farrant, primary, Costalonga, Everlayny Fiorot, additional, Montenegro, Luciana Ribeiro, additional, Antonini, Sonir Roberto, additional, Martinelli, Carlos Eduardo, additional, Ramos, Ester Silveira, additional, Mendonca, Berenice Bilharinho, additional, Arnhold, Ivo Prado, additional, and Jorge, Alexander Augusto, additional
- Published
- 2011
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10. Familial Risk Among Patients with Endometriosis
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Dos Reis, Rosana Maria, Silva De Sá, Marcos Felipe, De Moura, Marcos Dias, Nogueira, Antônio Alberto, Ribeiro, João Ulisses, Ramos, Ester Silveira, and Ferriani, Rui Alberto
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- 1999
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11. MHM assay: molecular sexing based on the sex-specific methylation pattern of the MHM region in chickens
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Caetano, Lisandra Cristina and Ramos, Ester Silveira
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- 2008
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12. Down syndrome and precocious menopause
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Bartmann, Ana Karina, Araújo, Francielle M., Iannetta, Odilon, Paneto, João C. C., Martelli, Lúcia, and Ramos, Ester Silveira
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- 2005
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13. Variation in DNA methylation in the KvDMR1 (ICR2) region in first-trimester human pregnancies
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Miranda Furtado, Cristiana Libardi, primary, Salomão, Karina Bezerra, additional, Verruma, Carolina Gennari, additional, Paulino Leite, Sarah Blima, additional, Lopes Rios, Álvaro Fabrício, additional, Bialecka, Monika, additional, Moustakas, Ioannis, additional, Mei, Hailiang, additional, de Paz, Claudia Cristina Paro, additional, Duarte, Geraldo, additional, Chuva de Sousa Lopes, Susana M., additional, and Ramos, Ester Silveira, additional
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- 2019
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14. The relationship among sperm global DNA methylation, telomere length, and DNA fragmentation in varicocele: a cross-sectional study of 20 cases
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Santana, Viviane Paiva, primary, Miranda-Furtado, Cristiana Libardi, additional, Pedroso, Daiana Cristina Chielli, additional, Eiras, Matheus Credendio, additional, Vasconcelos, Maria Aparecida Carneiro, additional, Ramos, Ester Silveira, additional, Calado, Rodrigo Tocantins, additional, Ferriani, Rui Alberto, additional, Esteves, Sandro Cassiano, additional, and dos Reis, Rosana Maria, additional
- Published
- 2019
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15. A new chicken molecular sexing assay based on the Z chromosome dose and the MHM region
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Eiras, Matheus Credendio, primary, Miranda-Furtado, Cristiana Libardi, additional, Fernandes, Artur, additional, and Ramos, Ester Silveira, additional
- Published
- 2018
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16. Detection of differentially methylated regions of irradiated fig tree selections
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Rodrigues, Maria Gabriela Fontanetti, primary, Soares, Murilo Racy, additional, Gimenez, Daniele Fernanda Jovino, additional, Fonseca, Larissa Fernanda Simielli, additional, Torrieri, Erico, additional, Ramos, Ester Silveira, additional, and Giuliatti, Silvana, additional
- Published
- 2017
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17. Differential expression of the MHM region and of sex-determining-related genes during gonadal development in chicken embryos
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Ramos, Ester Silveira
- Subjects
DETERMINAÇÃO DO SEXO ANIMAL - Published
- 2014
18. Erratum to: Familial chromosomal translocation X; 22 associated with infertility and recurrent X mosaicism
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Grzesiuk, Juliana Dourado, primary, Pereira, Ciro Silveira, additional, Grangeiro, Carlos Henrique Paiva, additional, Picanço-Albuquerque, Clarissa Gondim, additional, Oliveira-Gennaro, Flávia Gaona, additional, Machado, Filipe Brum, additional, Medina-Acosta, Enrique, additional, Ramos, Ester Silveira, additional, Yoshimoto, Maisa, additional, and Martelli, Lucia, additional
- Published
- 2016
- Full Text
- View/download PDF
19. Familial chromosomal translocation X; 22 associated with infertility and recurrent X mosaicism
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Grzesiuk, Juliana Dourado, primary, Pereira, Ciro Silveira, additional, Grangeiro, Carlos Henrique Paiva, additional, Picanço-Albuquerque, Clarissa Gondim, additional, Oliveira-Gennaro, Flávia Gaona, additional, Machado, Filipe Brum, additional, Medina-Acosta, Enrique, additional, Ramos, Ester Silveira, additional, Yoshimoto, Maisa, additional, and Martelli, Lucia, additional
- Published
- 2016
- Full Text
- View/download PDF
20. A rare non-Robertsonian translocation involving chromosomes 15 and 21
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Baruffi, Marcelo Razera, Souza, Deise Helena, Silva, Rosana Aparecida Bicudo, Ramos, Ester Silveira, and Moretti-Ferreira, Danilo
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Chromosomes, human, pair 15 ,Chromosome deletion ,Deleção cromossômica ,Down syndrome ,Chromosomes, human, pair 21 ,Translocation, genetic ,Síndrome de Down ,Cromossomos humanos par 21 ,Translocação genética ,Cromossomos humanos par 15 - Abstract
CONTEXT: Robertsonian translocations (RT) are among the most common balanced structural rearrangements in humans and comprise complete chromatin fusion of the long arm of two acrocentric chromosomes. Nevertheless, non-Robertsonian translocation involving these chromosomes is a rare event. CASE REPORT: We report a de novo unbalanced translocation involving chromosomes 15 and 21. The newborn was the daughter of a 29-year-old mother and a 42-year-old father. The couple was non-consanguineous. Clinical findings led to the diagnosis of Down syndrome (DS) with severe congenital heart defects (persistent arterial duct, and complete atrioventricular septal defect), as well as low birth length and weight (< 5th and < 10th percentile, respectively, based on specific measurement curves for DS). Conventional cytogenetic analysis revealed the karyotype 46,XX,der(15)(15pter→15q26.2::21q11.2→21qter). The translocation was confirmed by means of fluorescence in situ hybridization. The parents had normal karyotypes. CONCLUSIONS: Differently from RT, in our case a rare event occurred involving the distal segment of 15q and the proximal segment of 21q. Only two reports of this translocation, involving chromosomes 15 and 21 but different breakpoints, have been described so far. The association between 21q duplication and 15q deletion makes it difficult to separate the effect of each chromosome, but might also be responsible for increasing the growth retardation, as detected in our case. Cytogenetic analysis on DS patients is mandatory not only to confirm the diagnosis, but also to assess the risk of recurrence at genetic counseling, as well as to evaluate the contribution of other chromosome aberrations in the final phenotype. CONTEXTO: Translocações robertsonianas (TR) estão entre os rearranjos estruturais balanceados mais comuns em humanos e compreendem a fusão da cromatina completa do braço longo de dois cromossomos acrocêntricos. No entanto, são raras as translocações não Robertsonianas envolvendo esses cromossomos. RELATO DE CASO: Nós descrevemos uma translocação não balanceada de novo envolvendo os cromossomos 15 e 21. A recém-nascida era filha de uma mãe de 29 anos e de um pai de 42 anos, casal não consanguíneo. Os achados clínicos levaram ao diagnóstico de síndrome de Down (SD) com defeitos cardíacos congênitos graves (persistência do canal arterial e defeito do septo atrioventricular completo), além de baixos comprimento e peso ao nascimento (< 5o e < 10o percentil em curvas de medidas específicas para SD, respectivamente). A análise citogenética convencional revelou o cariótipo 46,XX,der(15)(15pter→15q26.2::21q11.2→21qter). A translocação foi confirmada por hibridação in situ fluorescente. Os pais apresentavam cariótipo normal. CONCLUSÕES: Diferentemente das TR, nesse caso ocorreu evento raro envolvendo o segmento distal de 15q e o proximal de 21q. Apenas dois relatos dessa translocação, envolvendo os cromossomos 15 e 21 e diferentes pontos de quebra, já foram descritos. A associação entre duplicação 21q e deleção 15q dificulta a distinção dos efeitos de cada cromossomo, mas poderia também ser responsável pelo acentuado retardo de crescimento. A análise citogenética é obrigatória em pacientes com SD não apenas para confirmar o diagnóstico, mas também para avaliar o risco de recorrência no aconselhamento genético, bem como avaliar a contribuição de alterações de outros cromossomos no fenótipo final.
- Published
- 2013
21. A rare non-Robertsonian translocation involving chromosomes 15 and 21
- Author
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Baruffi,Marcelo Razera, Souza,Deise Helena, Silva,Rosana Aparecida Bicudo, Ramos,Ester Silveira, and Moretti-Ferreira,Danilo
- Subjects
Chromosomes, human, pair 15 ,Chromosome deletion ,Down syndrome ,Chromosomes, human, pair 21 ,Translocation, genetic - Abstract
CONTEXT: Robertsonian translocations (RT) are among the most common balanced structural rearrangements in humans and comprise complete chromatin fusion of the long arm of two acrocentric chromosomes. Nevertheless, non-Robertsonian translocation involving these chromosomes is a rare event. CASE REPORT: We report a de novo unbalanced translocation involving chromosomes 15 and 21. The newborn was the daughter of a 29-year-old mother and a 42-year-old father. The couple was non-consanguineous. Clinical findings led to the diagnosis of Down syndrome (DS) with severe congenital heart defects (persistent arterial duct, and complete atrioventricular septal defect), as well as low birth length and weight (< 5th and < 10th percentile, respectively, based on specific measurement curves for DS). Conventional cytogenetic analysis revealed the karyotype 46,XX,der(15)(15pter→15q26.2::21q11.2→21qter). The translocation was confirmed by means of fluorescence in situ hybridization. The parents had normal karyotypes. CONCLUSIONS: Differently from RT, in our case a rare event occurred involving the distal segment of 15q and the proximal segment of 21q. Only two reports of this translocation, involving chromosomes 15 and 21 but different breakpoints, have been described so far. The association between 21q duplication and 15q deletion makes it difficult to separate the effect of each chromosome, but might also be responsible for increasing the growth retardation, as detected in our case. Cytogenetic analysis on DS patients is mandatory not only to confirm the diagnosis, but also to assess the risk of recurrence at genetic counseling, as well as to evaluate the contribution of other chromosome aberrations in the final phenotype.
- Published
- 2013
22. Autism Spectrum Disorder in a Girl with a De Novo X;19 Balanced Translocation
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Baruffi, Marcelo Razera, de Souza, Deise Helena, Bicudo da Silva, Rosana Aparecida, Ramos, Ester Silveira, and Moretti-Ferreira, Danilo
- Subjects
Article Subject - Abstract
Balanced X-autosome translocations are rare, and female carriers are a clinically heterogeneous group of patients, with phenotypically normal women, history of recurrent miscarriage, gonadal dysfunction, X-linked disorders or congenital abnormalities, and/or developmental delay. We investigated a patient with a de novo X;19 translocation. The six-year-old girl has been evaluated due to hyperactivity, social interaction impairment, stereotypic and repetitive use of language with echolalia, failure to follow parents/caretakers orders, inconsolable outbursts, and persistent preoccupation with parts of objects. The girl has normal cognitive function. Her measurements are within normal range, and no other abnormalities were found during physical, neurological, or dysmorphological examinations. Conventional cytogenetic analysis showed a de novo balanced translocation, with the karyotype 46,X,t(X;19)(p21.2;q13.4). Replication banding showed a clear preference for inactivation of the normal X chromosome. The translocation was confirmed by FISH and Spectral Karyotyping (SKY). Although abnormal phenotypes associated with de novo balanced chromosomal rearrangements may be the result of disruption of a gene at one of the breakpoints, submicroscopic deletion or duplication, or a position effect, X; autosomal translocations are associated with additional unique risk factors including X-linked disorders, functional autosomal monosomy, or functional X chromosome disomy resulting from the complex X-inactivation process.
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- 2012
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23. Meiotic wave adds extra asymmetry to the development of female chicken gonads
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de Melo Bernardo, Ana, primary, Heeren, A. Marijne, additional, van Iperen, Liesbeth, additional, Fernandes, Maria Gomes, additional, He, Nannan, additional, Anjie, Stafford, additional, Noce, Toshiaki, additional, Ramos, Ester Silveira, additional, and de Sousa Lopes, Susana M. Chuva, additional
- Published
- 2015
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24. Analysis of Global DNA Methylation in Irradiated Fig Selections
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Fontanetti Rodrigues, Maria Gabriela, primary, Soares, Murilo Racy, additional, Ramos, Ester Silveira, additional, and Giuliatti, Silvana, additional
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- 2015
- Full Text
- View/download PDF
25. Three-year-old child with meroacrania – Neurological signs
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Funayama, Carolina Araújo Rodrigues, Pfeifer, Luzia Iara, Ramos, Ester Silveira, Santucci, Patrícia Zambroni, Gomy, Israel, and Neto, Adolfo Marcondes Amaral
- Published
- 2011
- Full Text
- View/download PDF
26. DNA fetal libre en el plasma materno y diagnóstico prenatal no invasivo
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Ramos, Ester Silveira
- Subjects
prenatal diagnosis ,células madre ,ética ,incompatibilidade de grupos sanguíneos ,ADN ,blood group incompatibility ,DNA ,ethics ,eclampsia ,epigênese genética ,incompatibilidad de grupos sanguíneos ,blood ,stem cells ,epigenesis^i1^sgene ,células-tronco ,sexo ,diagnóstico prenatal ,sex ,diagnóstico pré-natal ,eclampsia epigénesis genética ,sangre ,sangue - Abstract
A natureza não invasiva para o feto da pesquisa de DNA fetal em circulação materna representa sua maior vantagem sobre os métodos convencionais de diagnóstico pré-natal. As aplicações desta metodologia envolvem a detecção do sexo fetal e o diagnóstico, tratamento intra-útero e avaliação do prognóstico de várias doenças. Já as células fetais detectadas em circulação materna podem estar envolvidas em doenças auto-imunes e representar uma fonte de células-tronco para as mães. Com a introdução comercial de uma técnica que detecta o sexo fetal entre 6-8 semanas, haveria o risco de abortos precoces devido à seleção do sexo por propósitos sociais, tornando necessária uma discussão prévia sobre os aspectos éticos desta questão. A introdução de novas técnicas não invasivas de diagnóstico pré-natal e o conhecimento das mesmas por parte da Equipe de Enfermagem poderão trazer grandes benefícios para a mãe e seus filhos, bem como auxiliar no Aconselhamento Genético das famílias. La naturaleza no invasiva de la investigación del DNA fetal en la circulación materna representa una ventaja importante con relación a los métodos convencionales de diagnóstico prenatal. El uso de esta metodología implica la determinación del sexo fetal y el diagnóstico, el tratamiento intra-útero y la evaluación del pronóstico en muchas enfermedades. Las células fetales detectadas en la circulación maternal también pueden ser implicadas en enfermedades autoinmunes y representar una fuente potencial de células madre. Por otra parte, con la introducción de una tecnología que detecte el sexo fetal entre 6-8 semanas de gestación, existe la posibilidad de aborto precoz basada en la selección del sexo para los propósitos sociales. Esto implica una discusión ética previa sobre este problema. La introducción de nuevas técnicas no invasivas de diagnóstico prenatal y el conocimiento del Equipo de Enfermería con respecto a las nuevas metodologías pueden ser muy importantes a la madre y a sus niños, y ayudar al Consejo Genético de las familias. The noninvasive nature of the detection of fetal DNA in the maternal circulation represents the greatest advantage over the conventional methods of prenatal diagnosis. The applications of this methodology involve the detection of the fetal sex, and diagnosis, intra-uterine treatment, and evaluation of the prognosis of many diseases. Fetal cells detected in the maternal circulation have also been shown to be implicated in autoimmune diseases and to represent a potential source of stem cells. On the other hand, with the introduction of a technology that detects the fetal sex as early as at 6-8 weeks of gestation, there is the possibility of early abortion based on sex selection for social purposes. This implies an ethical discussion about the question. The introduction of new noninvasive techniques of prenatal diagnosis and the knowledge of the Nursing Team regarding new methodologies can be of great benefit to the mother and her children, and can help the Genetic Counseling of the families.
- Published
- 2006
27. Atención de enfermería basada en genómica para las mujeres con Síndrome de Turner
- Author
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Flória-Santos, Milena and Ramos, Ester Silveira
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diagnóstico de enfermagem ,diagnóstico de enfermería ,genetic counseling ,cuidados de enfermagem ,Síndrome de Turner ,atención de enfermería ,aconselhamento genético ,Turner Syndrome ,genetics ,nursing diagnosis ,genética ,consejo genético ,nursing care - Abstract
Os avanços biológicos e tecnológicos gerados a partir do Projeto Genoma Humano estão tendo um impacto dramático na expansão do papel dos enfermeiros na prática atual do cuidado em saúde. As novas pesquisas genéticas necessitam ser rapidamente transformadas em protocolos clínicos, com recomendações para ministrar cuidados a populações alvo. Enfermeiros podem contribuir significantemente, como parte de uma abordagem interdisciplinar, para traduzir o conhecimento baseado no genoma em benefícios para o cuidado em saúde e para a sociedade. Neste contexto, nós descrevemos um protocolo de investigação clínico-genético, assim como diagnósticos de enfermagem, intervenções e resultados para clientes com Síndrome de Turner (ST) e risco de desenvolver tumores gonadais, devido à presença de um cromossomo Y normal ou anormal. Los avances biológicos y tecnológicos generados a partir del Proyecto Genoma Humano están teniendo un impacto dramático en el extenso papel de las enfermeras en la práctica actual del cuidado de la salud. Nuevas investigaciones genéticas necesitan ser transformadas rápidamente en protocolos clínicos con recomendaciones para suministrar cuidados a las poblaciones necesitadas. Las enfermeras pueden contribuir significantemente, como parte de un acercamiento interdisciplinario, traduciendo conocimientos basados en el genoma en ventajas para el cuidado de la salud y la sociedad. En este contexto, describimos un protocolo de investigación clínico-genético e también diagnósticos de enfermería, intervenciones y resultados para clientes con Síndrome de Turner (TS) y riesgo de desarrollar tumores gonadales, debido a la presencia de un cromosoma Y normal o anormal. Biologic and technologic advances generated from The Human Genome Project are having a dramatic impact on the expanding role of nurses in current health care practice. New genetic research needs to be transformed rapidly into clinical protocols with recommendations for delivering care to targeted populations. Nurses can contribute significantly, as part of an interdisciplinary approach, to translate genome-based knowledge into benefits for health care and society. In this context, we describe a clinical-genetic investigation protocol, as well nursing diagnosis, interventions and outcomes for clients with Turner Syndrome (TS) at risk for develop gonadal tumors, due the presence of a normal or abnormal Y chromosome.
- Published
- 2006
28. Genomic-based nursing care for women with turner syndrome: genomic-based nursing care
- Author
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Ramos, Ester Silveira
- Subjects
ACONSELHAMENTO GENÉTICO - Published
- 2006
29. 5meCpG Epigenetic Marks Neighboring a Primate-Conserved Core Promoter Short Tandem Repeat Indicate X-Chromosome Inactivation
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Machado, Filipe Brum, primary, Machado, Fabricio Brum, additional, Faria, Milena Amendro, additional, Lovatel, Viviane Lamim, additional, Alves da Silva, Antonio Francisco, additional, Radic, Claudia Pamela, additional, De Brasi, Carlos Daniel, additional, Rios, Álvaro Fabricio Lopes, additional, de Sousa Lopes, Susana Marina Chuva, additional, da Silveira, Leonardo Serafim, additional, Ruiz-Miranda, Carlos Ramon, additional, Ramos, Ester Silveira, additional, and Medina-Acosta, Enrique, additional
- Published
- 2014
- Full Text
- View/download PDF
30. A rare non-Robertsonian translocation involving chromosomes 15 and 21
- Author
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Baruffi, Marcelo Razera, primary, Souza, Deise Helena, additional, Silva, Rosana Aparecida Bicudo, additional, Ramos, Ester Silveira, additional, and Moretti-Ferreira, Danilo, additional
- Published
- 2013
- Full Text
- View/download PDF
31. Autism Spectrum Disorder in a Girl with aDe NovoX;19 Balanced Translocation
- Author
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Baruffi, Marcelo Razera, primary, de Souza, Deise Helena, additional, Bicudo da Silva, Rosana Aparecida, additional, Ramos, Ester Silveira, additional, and Moretti-Ferreira, Danilo, additional
- Published
- 2012
- Full Text
- View/download PDF
32. MHM assay: molecular sexing based on the sex-specific methylation pattern of the MHM region in chickens
- Author
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Caetano, Lisandra Cristina, primary and Ramos, Ester Silveira, additional
- Published
- 2007
- Full Text
- View/download PDF
33. Turner syndrome: counseling prior to oocyte donation
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Ramos, Ester Silveira, primary
- Published
- 2007
- Full Text
- View/download PDF
34. Cell-free fetal DNA in maternal plasma and noninvasive prenatal diagnosis
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Ramos, Ester Silveira, primary
- Published
- 2006
- Full Text
- View/download PDF
35. Genomic-based nursing care for women with Turner Syndrome: genomic-based nursing care
- Author
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Flória-Santos, Milena, primary and Ramos, Ester Silveira, additional
- Published
- 2006
- Full Text
- View/download PDF
36. Use of the TSPY gene for sexing cattle
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Lemos, Daniela Cristina, primary, Rios, Álvaro Fabrício Lopes, additional, Caetano, Lisandra Cristina, additional, Lôbo, Raysildo Barbosa, additional, Vila, Reginaldo Aparecido, additional, Martelli, Lúcia, additional, Takeuchi, Paula Lumy, additional, and Ramos, Ester Silveira, additional
- Published
- 2005
- Full Text
- View/download PDF
37. Genetics and nursing: nurses' role in the oncogenetics counseling and in the molecular study of the Hereditary Breast and Ovary Cancer Syndrome
- Author
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Flória-Santos, Milena, primary and Ramos, Ester Silveira, additional
- Published
- 2005
- Full Text
- View/download PDF
38. Blepharo–cheilo–dontic (BCD) syndrome with agenesis of thyroid broadens the phenotype and extends the discussion about the genes
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Martinhago, Ciro Dresch, primary and Ramos, Ester Silveira, additional
- Published
- 2004
- Full Text
- View/download PDF
39. Beckwith-Wiedemann syndrome and isolated hemihyperplasia
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Gomes, Marcus Vinícius de Matos, primary and Ramos, Ester Silveira, additional
- Published
- 2003
- Full Text
- View/download PDF
40. 5meCpG Epigenetic Marks Neighboring a Primate-Conserved Core Promoter Short Tandem Repeat Indicate X-Chromosome Inactivation.
- Author
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Machado, Filipe Brum, Machado, Fabricio Brum, Faria, Milena Amendro, Lovatel, Viviane Lamim, Alves da Silva, Antonio Francisco, Radic, Claudia Pamela, De Brasi, Carlos Daniel, Rios, Álvaro Fabricio Lopes, de Sousa Lopes, Susana Marina Chuva, da Silveira, Leonardo Serafim, Ruiz-Miranda, Carlos Ramon, Ramos, Ester Silveira, and Medina-Acosta, Enrique
- Subjects
EPIGENETICS ,GENETIC markers ,PROMOTERS (Genetics) ,TANDEM repeats ,X chromosome ,CYTOSINE - Abstract
X-chromosome inactivation (XCI) is the epigenetic transcriptional silencing of an X-chromosome during the early stages of embryonic development in female eutherian mammals. XCI assures monoallelic expression in each cell and compensation for dosage-sensitive X-linked genes between females (XX) and males (XY). DNA methylation at the carbon-5 position of the cytosine pyrimidine ring in the context of a CpG dinucleotide sequence (5
me CpG) in promoter regions is a key epigenetic marker for transcriptional gene silencing. Using computational analysis, we revealed an extragenic tandem GAAA repeat 230-bp from the landmark CpG island of the human X-linked retinitis pigmentosa 2 RP2 promoter whose 5me CpG status correlates with XCI. We used this RP2 onshore tandem GAAA repeat to develop an allele-specific 5me CpG-based PCR assay that is highly concordant with the human androgen receptor (AR) exonic tandem CAG repeat-based standard HUMARA assay in discriminating active (Xa) from inactive (Xi) X-chromosomes. The RP2 onshore tandem GAAA repeat contains neutral features that are lacking in the AR disease-linked tandem CAG repeat, is highly polymorphic (heterozygosity rates approximately 0.8) and shows minimal variation in the Xa/Xi ratio. The combined informativeness of RP2/AR is approximately 0.97, and this assay excels at determining the 5me CpG status of alleles at the Xp (RP2) and Xq (AR) chromosome arms in a single reaction. These findings are relevant and directly translatable to nonhuman primate models of XCI in which the AR CAG-repeat is monomorphic. We conducted the RP2 onshore tandem GAAA repeat assay in the naturally occurring chimeric New World monkey marmoset (Callitrichidae) and found it to be informative. The RP2 onshore tandem GAAA repeat will facilitate studies on the variable phenotypic expression of dominant and recessive X-linked diseases, epigenetic changes in twins, the physiology of aging hematopoiesis, the pathogenesis of age-related hematopoietic malignancies and the clonality of cancers in human and nonhuman primates. [ABSTRACT FROM AUTHOR]- Published
- 2014
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41. OSTEOARTRITE: ANÁLISE CITOGENÉTICA.
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Baruffi, Marcelo Razera, Engel, Edgard Eduard, Ramos, Ester Silveira, and Tone, Luiz Gonzaga
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Introduction: Osteoarthritis (OA) is a degenerative disease, characterized by extracellular matrix degradation and loss of a chondrogenic phenotype in the cartilage. OA has a complex etiology involving genetic, epigenetic, and environmental factors. Objective: the main aim of our study was the cytogenetic analysis in OA for detection of consistent chromosomal abnormalities for biomarker studies. Methods: a sample, with histopathology analysis confirming OA, was obtained from the right talonavicular joint of a 31-yearold female patient. Cytogenetic analysis was carried out after cell culture and GTG banding. Results: The clonal numerical alterations were monosomies of chromosomes X, 1, 6, 9, 11, 13, 14 and 15. We detected an addition material on 16q, and 22p, deletion of the 17p (with the breakpoint involving the TP53 gene) and 9qh + (significant loci on chromosome 9q have been associated with OA). Conclusion: we found chromosomal aberrations reported in the literature and other alterations not yet described, but previously reported in other diseases. Genetic and epigenetic analysis of OA may allow the discovery of prognostic biomarkers and they could influence, in the future, the medical routine for better management of patients. [ABSTRACT FROM AUTHOR]
- Published
- 2017
42. Relevancia de polimorfismos geneticos para concentrações sanguineas e plasmaticas de chumbo na gravidez
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Dias, Vania Braghini de Rezende, Tanus-Santos, Jose Eduardo, Rocha, João Batista Teixeira da, Funayama, Carolina Araújo Rodrigues, Ramos, Ester Silveira, Sabha, Maricene, Universidade Estadual de Campinas. Faculdade de Ciências Médicas, Programa de Pós-Graduação em Farmacologia, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Sintase do portobilinogenio ,Lead ,Pregnancy ,Toxicologia genética ,Haplotype ,Polimorfismo (Genética) ,Gravidez ,Haplótipos ,Porphobilinogen Synthase ,Polymorphism ,Toxicogenetics ,Chumbo - Abstract
Orientador: Jose Eduardo Tanus dos Santos Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas Resumo: Mulheres grávidas constituem um grupo de indivíduos particularmente mais susceptíveis aos efeitos tóxicos associados ao chumbo (Pb)[1]. O chumbo é um metal pesado que se acumula nos tecidos mineralizados. Possui um comportamento similar ao cálcio, o que explica sua toxicidade. Durante a gravidez, o remodelamento ósseo promove a migração do chumbo para o plasma e como resultado, o metal é transferido para o feto, mesmo se a mãe foi exposta há vários anos [2]. Durante a exposição materna, cerca de 99% do chumbo absorvido, aqui referenciado como Pb-Sangue Total, permanece associado a enzima acido d-aminolevulinico desidratase (ALAD) no eritrócito. O restante (cerca de 1%), aqui referenciado como Pb-Plasma (e/ou Soro), permanece livre e eventualmente se deposita nos tecidos mineralizados (ossos e dentes)[2]. O Pb-Sangue Total e Pb-Plasma (ou Soro) são naturalmente correlacionados, mas essa correlação ainda não está bem compreendida, sendo essencial a medida dos dois parâmetros para esclarecer esses processos. Além disso, os fatores genéticos são de crucial importância, com alguns genes como o da ALAD e o do receptor da vitamina D (VDR) tendo sido associados a diferentes concentrações sanguíneas e plasmáticas de chumbo em indivíduos expostos[3]. A dinâmica do chumbo durante a gravidez também tem um papel importante nesse processo e deve ser considerada. Até o momento, nenhum trabalho havia estudado os fatores genéticos acima citados, numa população especialmente exposta e susceptível aos efeitos deletérios do chumbo. Mesmo quando a exposição materna cessa, o chumbo permanece alojado nos ossos por vários anos e será mobilizado através do remodelamento ósseo, contaminando o feto. Haveria um grupo de gestantes, segundo genótipos, predisposto a maiores ou menores aumentos do metal no plasma e fração plasmática? Teriam maior re-exposição ao chumbo durante períodos de acentuado remodelamento ósseo? Para responder a essas questões, esse estudo concentrou nas medidas do metal no Sangue e Plasma e/ou Soro (sendo o Soro equivalente ao plasma) e na avaliação da susceptibilidade genética das grávidas através do estudo dos polimorfismos dos genes ALAD e VDR, além da análise de polimorfismos agrupados em haplótipos. Nós não encontramos diferenças significativas para o grupo de genótipos da ALAD, nem mesmo para os genótipos do VDR. Porém, as principais descobertas foram que o grupo de haplótipos H8 do VDR (f, a, b) estão associados às mais baixas concentrações de Pb no Soro e na razão Pb-Soro/Pb-Sangue Total. Esses resultados sugerem que esse grupo de gestantes, mesmo expostas às mesmas concentrações de Pb, acumula e/ou reabsorvem menos Pb que os grupos com outros haplótipos. Além disso, é importante ressaltar que analisando apenas a concentração de Pb no sangue total, não seria possível chegar a essa conclusão. Abstract: Pregnant women constitute a group of subjects particularly susceptible to toxic effects due to exposure to lead (Pb). Lead is a heavy metal which accumulates in bone tissues and has a behavior that is similar to calcium, thus explaining its toxicity. In particular, the increase in bone resorption processes that take place during pregnancy cause lead migration into the maternal plasma. As a result, lead transference to the fetus may take place even years after the mother's last exposure. During maternal exposure, most (99%) of the absorbed lead (here referred to as Pb-Blood) remains associated to d - aminolevulinic acid dehydratase within erytrocytes. The remaining (2% to 10%, here referred to as Pb-Plasma) lead remains free and is eventually deposited - and accumulated - in the bone tissues (teeth and bones). The Pb-Blood and Pb-Plasma are naturally correlated, but the correlation is not well understood, making it essential to measure both quantities in studies aimed at clarifying these processes. Also of crucial importance are genetic factors, with some genes such as ALAD and VDR been associated with Pb-Blood and Pb-Plasma concentrations. The dynamics of lead migration during pregnancy also plays a major role in the process and therefore must also be considered. Even after the mother's exposure has ceased, lead remains accumulated in the teeth and bones for many years and is mobilized by processes of bone resorption such as those taking place during pregnancy. Is there a group of pregnant women, according to genotypes, that is more prone to higher or lower Pb concentations in plasma? Is that group more exposed to Pb due to greater Pb absorption or reabsorption through bone remodeling? To address these questions, this study focused on the measurement of Pb-Blood and Pb-Serum (the same of plasma) and on genetic susceptibility of pregnant women. We found no significant differences among different ALAD or VDR genotype groups. However, the main findings reported here are that haplotype H8 of VDR (f, a, b) is associated with lower Pb-Serum concentration and lower Pb-Serum/Pb-Blood ratios. Therefore, pregnant women with this haplotype have lower Pb-serum, even when exposed to the same Pb-Blood concentrations. Interestingly, we would not have make this conclusion by assessing only Pb-Blood concentrations. Doutorado Farmacologia Doutor em Farmacologia
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- 2021
43. Resposta ao sildenafil em pacientes com disfunção erétil
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Muniz, Jaqueline Joice, 1985, Tanus-Santos, Jose Eduardo, Mónica, Fabíola Zakia, Fregonesi, Adriano, Ramos, Ester Silveira, Delbin, Maria Andréia, Universidade Estadual de Campinas. Faculdade de Ciências Médicas, Programa de Pós-Graduação em Farmacologia, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Oxidative stress ,Pharmacogenetics ,Estresse oxidativo ,Farmacogenética ,Sildenafil ,Citrato de sildenafila ,Erectile dysfunction ,Nitric oxide ,Disfunção erétil ,Óxido nítrico - Abstract
Orientador: José Eduardo Tanus dos Santos Texto em português e inglês Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas Resumo: A disfunção erétil (DE) é uma doença que atinge milhões de homens em todo o mundo e tem sua prevalência aumentada com a idade. O tratamento via oral mais utilizado para pacientes com DE é o sildenafil, um inibidor de fosfodiesterase do tipo 5, que age aumentando níveis de monofosfato cíclico de guanosina, melhorando assim a função erétil. O óxido nítrico (NO) é o principal responsável pela dilatação dos corpos cavernosos e consequente ereção peniana. Polimorfismos no gene da enzima sintase de NO endotelial (eNOS) foram mostrados estarem associados a formação de NO e suscetibilidade à DE. O objetivo do presente trabalho foi avaliar se marcadores genéticos e bioquímicos poderiam afetar a resposta ao tratamento com sildenafil em pacientes com DE. Polimorfismos no gene da eNOS (SNP na região promotora, T-786C; VNTR no intron 4, 4b4a; SNP no exon 7, Glu298Asp), marcadores da formação de NO (nitrito no sangue total) e estresse oxidativo (glutationa reduzida, FRAP, TBARS e proteínas carboniladas) foram utilizados para avaliar uma possível correlação com resposta terapêutica ao sildenafil em dois estudos. A função erétil de todos participantes foi avaliada utilizando o questionário Índice Internacitonal de Função Erétil (IIEF). No estudo de marcadores genéticos e resposta ao sildenafil foram selecionados 118 pacientes (63 pacientes com DE pós operatória e 55 pacientes com DE clínica) divididos em bons e maus respondedores ao sildenafil de acordo com a pontuação no IIEF. Foi observado neste estudo que a presença do alelo C para o polimorfismo T-786C em pacientes com DE pós operatória, e do alelo 4a para o polimorfismo 4b4a em pacientes com DE clínica, foi mais frequente em bons respondedores comparado aos maus respondedores ao sildenafil. Além do mais, em pacientes com DE pós operatória, o haplótipo constituído pelos alelos C 4a Glu foi mais comum em bons respondedores comparados aos maus respondedores ao sildenafil. No estudo de marcadores bioquímicos e resposta ao sildenafil foram recrutados 44 pacientes e 28 homens saudáveis. Os 44 pacientes foram divididos em dois grupos: 26 pacientes com DE (grupo DE) e 18 pacientes com DE e diabetes mellitus do tipo II (grupo DE/DM). Os resultados do nosso estudo bioquímico sugerem que baixos níveis de NO em pacientes nos dois grupos de DE clínica (grupo DE e grupo DE/DM) são benéficos em relação ao tratamento com sildenafil nesses pacientes. Além disso, baixo nível do marcador antioxidante FRAP mostrou ser melhor para resposta ao sildenafil em pacientes do grupo DE/DM. Em conclusão, nossos achados mostram que polimorfismos no gene da eNOS e marcadores da formação de NO e estresse oxidativo estão associados a resposta ao tratamento com sildenafil em pacientes com DE Abstract: Erectile dysfunction (ED) affects millions of men around the world. Its prevalence increases with age. The most common treatment for patients with ED is sildenafil, an inhibitor of phosphodiesterase type 5, which acts by increasing levels of cyclic guanosine monophosphate, thereby improving erectile function. Nitric oxide (NO) is the mainly responsible for the corpus cavernosum dilatation, and consequent penile erection. Polymorphisms in the gene of the enzyme NO synthase (eNOS) have been shown to be associated with the formation of NO and susceptibility to DE. The objective of this study was to evaluate if genetic and biochemical markers could affect response to treatment with sildenafil in patients with ED. Polymorphisms in eNOS gene (SNP in the promoter region, T-786C; VNTR in the intron 4, 4b4a; SNP in the exon 7, Glu298Asp) and markers of NO formation (whole blood nitrite) and oxidative stress (reduced glutathione, FRAP, TBARS and carbonyl) were used to evaluate a possible association with therapeutic response to sildenafil in two studies. The erectile function of all participants was assessed using the IIEF questionnaire. In the study of genetic markers and response to sildenafil were selected 118 patients (63 patients with postoperative ED and 55 patients with clinic ED) divided into good and poor responders to sildenafil according to IIEF score. It was observed in that study that the C allele for the SNP T-786C in patients with postoperative ED, and the 4a allele for the VNTR 4b4a in patients with clinical ED were more common in good responders compared to poor responders to sildenafil. Moreover, in patients with postoperative ED, the haplotype consisting of C 4a Glu alleles was more common in good responders compared to poor responders to sildenafil. In the study of biochemical markers and response to sildenafil were recruited 44 patients and 28 healthy men. The 44 patients were divided into two groups: 26 patients with ED (ED group) and 18 patients with ED and type II diabetes mellitus (ED/DM group). The results of our biochemical study suggest that lows level of NO in patients in two clinical groups of DE (DE and ED/DM groups) are beneficial in the treatment with sildenafil in that patients. Moreover, low level of the antioxidant FRAP marker showed be better for sildenafil responsiveness in ED/DM group. In conclusion, our findings show that eNOS gene polymorphisms and markers of NO formation and oxidative stress affect the response to treatment with sildenafil in patients with ED Doutorado Farmacologia Doutora em Farmacologia
- Published
- 2021
44. Molecular analysis of C4/CYP21 locus : influence of allelic variability caused by recombinations on current methods of mutation detection
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Lacchini, Fernanda Borchers Coeli, Mello, Maricilda Palandi de, Sonati, Maria de Fátima, Castro, Margaret de, Ramos, Ester Silveira, Melo, Mônica Barbosa de, Universidade Estadual de Campinas. Instituto de Biologia, Programa de Pós-Graduação em Genética e Biologia Molecular, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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CYP21A1P/CYP21A2 chimeric gene ,Conversão genica ,Gene deletion ,Gene conversion ,Modulo RCCX ,Deficiencia de 21 hidroxilase ,Deleção de genes ,21-hydroxylase deficiency ,Gene hibrido CYP21A1P/CYP21A2 ,RCCX module - Abstract
Orientador: Maricilda Palandi de Mello Tese (doutorado) - Universidade Estadual de Campinas, Insituto de Campinas Resumo: A hiperplasia congênita da adrenal é causada pela deficiência de uma das cinco enzimas responsáveis pela síntese do cortisol na esteroidogênese, sendo que mais de 90% dos casos ocorrem devido à deficiência de 21-hidroxilase (21-OH). O genoma haplóide humano possui duas cópias em tandem do gene que codifica para a 21-OH, denominados CYP21A2 e o CYP21A1P. Embora as duas cópias, CYP21A1P e CYP21A2, tenham aproximadamente 98% de homologia, CYP21A1P é classificado como um pseudogene, devido a algumas alterações deletérias em sua seqüência. Foram mapeados no braço curto do cromossomo 6, assim como os genes RP, C4 e TNX também duplicados em tandem. Este loco é denominado modulo RCCX, onde cada letra representa um gene. Uma conseqüência esperada deste tipo de organização é que esta favorece eventos de crossingover desigual, produzindo cromátides irmãs assimétricas e pares de gametas com um número variável de unidades completas. O crossover desigual não gera somente um tipo definido de deleção (alelos monomodulares), de duplicação (alelo trimodular) ou de conversão (alelo bimodular), mas pode, dependendo da sua exata localização, produzir um grande número de alelos diferentes, com significados funcionais variáveis. O objetivo deste trabalho foi investigar a variabilidade dos genes híbridos CYP21A21P/CYP21A2 quanto à região de recombinação nos alelos monomodulares, bimodulares e trimodulares de indivíduos com deficiência de 21- hidroxilase. Foram incluídos 55 pacientes com deficiência de 21 - hidroxilase, que foram avaliados por Southern blot, Multiplex ligation-dependent probe amplification (MLPA), PCR - Alelo especifico (ASO-PCR) e seqüenciamento. Na triagem por Southern blot foram identificados 26 alelos mono-, 26 bi- e 5 trimodulares com prováveis genes híbridos. Foi identificado um alelo monomodular novo portador da variante C4A [6,4 kb] que se mostrou único inclusive quanto à formação híbrida CYP21A21P/CYP21A2. Com a técnica de MLPA foi possível mapear três regiões principais de recombinação dos genes híbridos CYP21A21P/CYP21A2 nas três configurações alélicas. Além disso, foram identificados possíveis híbridos dos genes C4A e B, tanto nas configurações mono quanto nas bimodulares. Assim, ficaram definidos 5 haplótipos monomodulares, 7 bimodulares e 3 trimodulares. As técnicas de ASO-PCR e sequenciamento para análise dos híbridos CYP21A21P/CYP21A2 e dos CYP21A21P nos alelos bi e trimodulares refinaram a caracterização subdividindo estes haplótipos em 10 mono, 15 bi e 5 trimodulares. Dado o alto grau de variabilidade encontrado não foi possível se identificar efeito fundador de nenhum haplótipo específico para a deficiência de 21-hidroxilase. Por outro lado, um haplótipo novo correspondendo a cerca de 15% dos monomodulares foi caracterizado como portador das mutações p.P34L e p.H62L e um haplótipo igualmente não descrito portador da p.H62L foi encontrado entre os bimodulares. SNPs no terminal 5'UTR, no íntron 2 e no éxon 7 responderam pela diferenciação principal entre os híbridos tanto nos haplótipos de mesmo grupo como na comparação entre os de grupos diferentes. Este trabalho indica que a combinação de quatro técnicas e o estudo de segregação nas famílias foram fundamentais para o esclarecimento dos genótipos dos pacientes. Os genes híbridos podem estar relacionados às formas clínicas perdedora de sal, não perdedora de sal e não clássica dependendo da região onde ocorre a recombinação para sua formação. Abstract: Congenital adrenal hyperplasia is caused by deficiency of one of the five enzymes responsible for cortisol synthesis in the steroidogenesis. More than 90% of the cases occur due to deficiency of 21-hidroxilase (21-OH). The haploid human genome bears two copies in tandem of 21-OH coding gene, CYP21A2 and CYP21A1P. Although the two copies are approximately 98% homologous, CYP21A1P is a pseudogene, due to some deleterious mutations. They map to the short arm of chromosome 6, as well as RP, C4 and TNX genes which are also duplicated in tandem. This locus is called RCCX module, each letter representing one gene. An expected consequence of such organization is that it favors events of unequal crossing-overs, producing pairs of gametes with different number of complete units. The aim of this investigation was to estimate the variability of CYP21A21P/CYP21A2 chimeric genes based on the region of recombination in the monomodular, bimodular and trimodular alleles in patients with 21-hydroxylase deficiency. Fifty-five patients were included for Southern blot, Multiplex ligationdependent probe amplification (MLPA), Allele-specific PCR (ASO-PCR) and sequencing analyses. Southern blot identified alleles which were: mono (n = 26), bi (n = 26) and trimodular (n = 5) with chimeric genes. A novel monomodular allele was identified that carry C4A [6,4 kb] variant and also bore an unique CYP21A21P/CYP21A2 formation. MLPA technique mapped three main recombination regions in CYP21A21P/CYP21A2 chimerical genes in the three RCCX configurations. Moreover, it indicated possible chimeric C4A and B genes in both mono- and bimodular configurations. Therefore, five mono-, seven bi- and three trimodular haplotypes had been defined. Both ASO-PCR and sequencing techniques for CYP21A21P/CYP21A2 and CYP21A21P analysis had refined the characterization subdividing these haplotypes in ten mono-, fifteen bi- and five trimodular. Considering the high degree of variability observed it was not possible to identify a founder effect of any specific haplotype for the deficiency of 21-hidroxilase. Conversely, a novel haplotype corresponding to about 15% of the monomodular alleles was characterized as carrying the mutations p.P34L and p.H62L and, similarly one haplotype carrying the p.H62L was found among bimodular alleles. SNPs in the 5 ' UTR, intron 2 and exon 7 were responsible for the main differentiation among chimerical genes within a group as well as upon comparison between different groups. The results presented here indicate that the combination of four different techniques and the study of segregation in the families had been essential for defining the genotypes of the patients. It is also shown that CYP21A21P/CYP21A2 chimeric genes can be related to different clinical forms: salt losing, non-salt losing and non-classical depending on the region where the recombination for its formation occurs. Doutorado Genética Animal e Evolução Doutor em Genética e Biologia Molecular
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- 2009
45. Evaluation of polymorphism in the genes CYP1A1, CYP2D6 and CYP19 in patients with cancer of sporadic breast
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Lidiane Camila Rueda, Bertuzzo, Carmen Sílvia, 1963, Magna, Luis Alberto, 1954, Steiner, Carlos Eduardo, Ramos, Ester Silveira, Universidade Estadual de Campinas. Faculdade de Ciências Médicas, Programa de Pós-Graduação em Farmacologia, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Cytochrome P-450 enzyme system ,Mamas - Câncer ,Citocromo P-450 ,Breast - Neoplasm - Abstract
Orientador: Carmen Silvia Bertuzzo, Luis Alberto Magna Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas Resumo: O câncer de mama (CM) é uma doença heterogênea e complexa, compreendendo múltiplas formas de apresentação clínica e morfológica, com diferentes graus de agressividade tumoral e potencial metastático. Acredita-se que 90% a 95% de todos os CM sejam esporádicos e decorram de mutações somáticas que se verificam durante a vida e que 5% a 10% sejam hereditários em virtude de uma mutação germinativa ao nascimento, que confere a estes indivíduos suscetibilidade ao CM. Entre os polimorfismos mais conhecidos de metabolização de drogas, estão os do sistema do citocromo P450. Os genes CYP1A1, CYP2D6 e CYP19 estão sendo estudados e em algumas populações mostraram uma associação positiva com a maior suscetibilidade ao CM. Este trabalho teve como objetivo investigar a presença dos polimorfismos T6235C (m1) e A4889G (m2) no gene CYP1A1, a presença dos polimorfismos A2637del (*3) e G1934A (*4) no gene CYP2D6 e a presença de alterações [TTTAn] no gene CYP19, por meio de um estudo de associação com uma amostra de 170 indivíduos, sendo 45 pacientes portadores de Adenocarcinoma e 120 controles normais. Foram utilizadas as técnicas extração de DNA, PCR e digestão enzimática. Não foi demonstrada, no presente estudo, associação entre os polimorfismos estudados e CM esporádico: (?2(2) = 1,12; p= 0,57) para o polimorfismo m1, (?2(2) = 0,83; p= 0,65) para o polimorfismo m2 do gene CYP1A1; (?2(2) = 0,15; p = 0,69) para o polimorfismo *3, (?2(2) = 2,41; p = 0,30) para o polimorfismo *4 do gene CYP2D6 e para as repetições em tandem [TTTA]n do gene CYP19. Os resultados sugerem que os polimorfismos gênicos estudados não estariam associados ao CM na amostra de indivíduos da região metropolitana de Campinas. Palavras-chave: CYP1A1, CYP2D6, CYP19, câncer de mama esporádico. Abstract: Breast cancer (BC) is a complex disease, with heterogeneous clinical and morphologic presentation, that has with different degrees of tumoral aggressiveness and metastatic potential. It is known that 90% to 95% of all the BC are sporadical and happens because of somatic mutations that occurs during life and that 5% to 10% are hereditary because of germinate mutation due to births, which makes these individuals susceptibly to the BC. Among the best known polymorphism of metabolism of drugs, are the system cytochrome P450. The genes CYP1A1, CYP2D6 and CYP19 are being studied and in some populations because they had shown a positive association with the biggest susceptibility to the BC. This work had as objective to investigate the presence of polymorphisms T6235C (m1) and A4889G (m2) in gene CYP1A1, polymorphisms A2637del (*3) and G1934A (*4) in gene CYP2D6 and the presence of alterations [TTTAn] in gene CYP19, through a study of association with a sample of 170 individuals: 45 carrying patients of adenocarcinoma and 120 normal controls. The techniques had been used extraction of DNA, PCR and enzymatic digestion. It was not demonstrated, in this study the association between the polymorphisms studied and sporadic BC (?2(2) = 1,12; p= 0,57) for the polymorphism m1, (?2(2) = 0,83; p= 0,65) for the polymorphism m2 of gene CYP1A1; (?2(2) = 0,15; p= 0,69) for polymorphism *3, (?2(2) = 2,41; p= 0,30) for polymorphism *4 of gene CYP2D6 and for gene CYP19. The results suggest that the genic polymorphisms studied would not be associated with the BC in the sample of individuals in the metropolitan area of Campinas. key words: CYP1A1, CYP2D6, CYP19, sporadic breast cancer. Mestrado Mestre em Farmacologia
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- 2008
46. Haplotypes of vitamin D modulate the circulate levels of leaf in exposed subjects
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Vania Braghini de Rezende, Tanus-Santos, Jose Eduardo, Clark, Colin, Nucci, Gilberto de, Ramos, Ester Silveira, Universidade Estadual de Campinas. Faculdade de Ciências Médicas, Programa de Pós-Graduação em Farmacologia, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Lead ,Vitamina D ,Polimorfismo (Genética) ,Polymorphism (Genetica) ,Vitamin D ,Chumbo - Abstract
Orientador: Jose Eduardo Tanus dos Santos Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas Resumo: O receptor da vitamina D (VDR) possui um importante papel na toxicidade do chumbo (Pb). Poucos trabalhos avaliaram o efeito dos polimorfismos VDR sobre as concentrações circulantes do metal em populações expostas ambientalmente. Além disso, nenhum estudo avaliou o efeito da combinação desses polimorfismos (haplótipos) sobre os mesmos parâmetros. A análise de haplótipos (combinação de marcadores genéticos dentro de uma determinada região no cromossomo) tem demonstrado ser uma melhor ferramenta em comparação com a análise de polimorfismos (SNPs) vistos isoladamente. Nesse estudo, avaliamos o efeito dos haplótipos estimados a partir dos polimorfismos BsmI , ApaI e FokI do VDR sobre os níveis de Pb-S (chumbo no sangue), Pb-P (chumbo no plasma) e na fração %Pb-P/Pb-S (chumbo no plasma/chumbo no sangue) em 150 voluntários expostos ambientalmente ao chumbo (65 homens e 85 mulheres; idade: 18 a 57 anos). Os genótipos para todos os polimorfismos do VDR foram determinados por PCR seguido por digestão com enzimas de restrição (RFLP). Pb-P e Pb-S foram determinados por espectrometria de massas com plasma indutivamente acoplado (ICP-MS) e espectrometria de absorção atômica com forno de grafite, respectivamente. Os resultados mostraram que os polimorfismos do VDR estão associados às concentrações de Pb circulantes e que o haplótipo H8, formado pelos alelos a, b e f, está associado com menores concentrações de Pb-S, Pb-P e %Pb-P/Pb-S. Estes achados podem apresentar importantes implicações toxicogenéticas, sendo necessários estudos posteriores para elucidar os mecanismos responsáveis por tais efeitos. Abstract: The Vitamin D Receptor (VDR) plays an important role in the toxicity of lead (Pb). Genetic factors, i.e polymorphisms, influence blood lead (Pb-B) concentrations in lead exposed subjects. However, only a few research studies have evaluated the effect of VDR polymorphism on the lead concentration in environmentally. Also, no studies have evaluated the combinatorial effect of these polymorphisms on the same parameters. The haplotype analysis (combination of genetic indicators in a certain region of the chromossome) has been shown to be a better tool if compared with the analyses of single polymorphisms. This study aimed at examining the combined effects (haplotype analysis) of three polymorphisms (BsmI , ApaI and FokI) in vitamin D receptor ( VDR) gene on Pb-B and on the concentrations of lead in plasma (Pb-P), which is more relevant to lead toxicity, in 150 environmentally exposed subjects (65 mens and 85 women). Genotypes were determined by RFLP, and Pb-P and Pb-B were determined by inductively coupled plasma mass spectrometry and by graphite furnace atomic absorption spectrometry, respectively. Subjects with the bb (BsmI ) or ff (FokI) genotypes have lower B-Pb than subjects in the other genotype groups. Subjects with the aa (ApaI ) or ff genotypes have lower P-Pb than subjects in the other genotype groups. Lower Pb-P, Pb-B, and %Pb-P/Pb-B levels were found in subjects with the haplotype combining the a, b, and f alleles for the ApaI , BsmI , and FokI polymorphisms, respectively, compared with the other haplotype groups. These findings may have important toxicogenetic implications and their molecular basis needs to be addressed in further studies. Mestrado Mestre em Farmacologia
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- 2007
47. Cystic fibrosis incidence calculated from heterozygote frequencies in Northeast and Southeast Brazil
- Author
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Leonardo Vicentini Arruda, Bertuzzo, Carmen Sílvia, 1963, Ribeiro, José Dirceu, Ramos, Ester Silveira, Universidade Estadual de Campinas. Faculdade de Ciências Médicas, Programa de Pós-Graduação em Farmacologia, and UNIVERSIDADE ESTADUAL DE CAMPINAS
- Subjects
Brazil - Population ,Regulador de condutância transmembrana em fibrose cística ,Incidence ,Mutation ,Incidência ,Fibrose cística ,Cystic fibrosis transmembrane conductance regulator ,Brasil - População ,Mutação ,Cystic fibrosis - Abstract
Orientador: Carmen Silvia Bertuzzo Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas Resumo: A incidência da fibrose cística no Brasil é significativamente variável, com diferenças de até 20 vezes de acordo com o grupo étnico e região geográfica estudada. A população brasileira é composta da mistura de muitos grupos étnicos. Os portugueses começaram a colonização no século XVI. Os holandeses invadiram o nordeste em 1630. Os africanos foram trazidos ao Brasil, numa contínua migração forçada, que perdurou do século XVI ao século XIX. No final do século XIX, tiveram início novos movimentos migratórios, principalmente da Alemanha, Itália, Arábia e Espanha. Durante as três primeiras décadas do século XX, nova corrente migratória ocorreu, principalmente da Itália, Espanha e Portugal Após a segunda guerra mundial, o Brasil recebeu novos imigrantes (japoneses, judeus) compondo esta população. Este estudo gerou os primeiros dados sobre a incidência da FC no nordeste e também foram obtidos novos dados para a região sudeste. Na época do estudo, na cidade de Campinas estão sob atendimento no ambulatório 70 pacientes não aparentados com dois testes de suor alterados. Nestes pacientes, foram triadas as seguintes mutações. ?F508 (50%), G542X (4,29%), R1162X (2,14%), N1303K (1,43%) e R553X (0,71%). A mutação G551D não foi encontrada. A mutação ?F508 também foi analisada em 1.138 mulheres saudáveis, sendo 694 da cidade de Campinas - SP e 444 de João Pessoa ¿ PB com idade média de 26,3 anos (15-39, ±6,8), que participaram voluntariamente de projeto de pesquisa anterior. Nas amostras coletadas em Campinas n=694 não foi encontrado nenhum alelo mutante 0/1.388, o que nos impediu de calcular a incidência nesta cidade através deste método. Dos 888 alelos analisados de João Pessoa, foram encontrados quatro alelos mutantes (p=0,0045). Sabendo que a mutação ?F508 corresponde a aproximadamente 50% dos alelos de indivíduos com FC no Brasil, a freqüência dos alelos causadores da FC foi estimada utilizando a proporção: (0,0045/0,5)=0,0090. Com isso, para a cidade de João Pessoa a incidência estimada desta doença autossômica recessiva é de 1:12.321 indivíduos. Esta incidência é similar à encontrada por afro-brasileiros, entretanto difere por exemplo, da encontrada na população do RS. Quando utilizamos o método de cruzamento de dados étnicos das duas regiões estudadas com dados literários da doença nos diferentes grupos étnicos, na cidade de Campinas a incidência da FC ficaria em 1/4.434 e na cidade de João Pessoa ficaria 1/6.087 Abstract: The incidence of the Cystic Fibrosis (CF) is significantly variable in Brazil, with differences larger than 20 fold, according with the ethnic group and geographic studied region. Brazilian population is composed by ethnic admixture. Portuguese started colonization in the 16th century. The Netherlander invaded the northeast in 1630. The Africans were brought to Brazil, in a continuous forced migration, which lasted from 16th to 19th centuries. In the 19th century, new migratory movements have begun from Germany, Italy, Arab and Spain. In the first three decades of the 20th century, started a new migratory flow, mainly from Italy, Spain and Portugal. After the World War II, Brazil received additional immigrants (Japanese, Jewish) compounding its population. These studies generated the first data about the CF incidence on the Brazilian northeast and also were obtained new data about the southeast region. At the time of this study, 70 non related patients were attended at the local CF center in Campinas, with two positive sweat tests in the city of Campinas-SP. On theses patients were screened the following mutations: ?F508 (50%), G542X (4.29%), R1162X (2.14%), N1303K (1.43%) and R553X (0.71%). The mutation G551D wasn¿t found. The ?F508 mutation was also analyzed in 1,138 healthy voluntary women, 694 from Campinas ¿ SP and 444 from João Pessoa ¿ PB, with average age of 26.3 years (15-39, ±6.8), who previously participated from another research. In the samples collected in Campinas ¿ SP n=694 wasn¿t found any mutated allele 0/1,388 and so, we wasn¿t able to make any incidence calculation through this method. In the 888 alleles from João Pessoa, four carry the ?F508 mutation (p=0.0045). Knowing that this mutation accounts for approximately 50% of the FC patients alleles in Brazil, the incidence of the CF in this region was estimated using the proportion: (0.0045/0.5)=0.009. Thus, the estimated incidence of this recessive disease in João Pessoa was 1:12,321. This incidence is similar to the found in African-Brazilians, although differs for example, to the found on the RS population. When we use the method of crossing ethnic data of both studied regions with literary data of the disease in the different ethnic groups, in the city of Campinas, the incidence of the CF would be in 1/4,434 and in the city of João Pessoa would be 1/6,087 Mestrado Mestre em Farmacologia
- Published
- 2006
48. Repeated acoustic stimulation (audiogenic kindling) induces estrous arrest in the Wistar audiogenic Rat (WAR) strain. A model of pseudopregnancy?
- Author
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Eiras MC, Verruma CG, Fernandes A, Ramos ES, Furtado CLM, Garcia-Cairasco N, and Dos Reis RM
- Abstract
Background: Epilepsy is a chronic disorder characterized by a predisposition to epileptic seizures, affecting more than 50 million people worldwide., Methods: Wistar and Wistar Audiogenic Rats (WAR) females were evaluated regarding estrous cycle and seizures episodes during repeated (kindling) acoustic stimulation at different stages of the estrous cycle., Results: Acoustic stimulation did not affect the estrous cycle of most Wistar females in either control (91.6 %) or kindled (70.0 %) groups. They also had no seizures episodes. In WAR females, most of the control group (91.6 %) showed regular cycles during acoustic stimulation. In the kindling group, all females showed irregular cycles during acoustic stimulation with diestrus arrest for several days (11.8 ± 1.46 days) and 12 of them (92.3 %) showed, at least, four mesencephalic seizure behaviors during the acoustic stimulation (1 ≤ cSI ≤ 8). In this group, 7 females (53.84 %) also showed limbic seizures (2 ≤ LI ≤ 4). When WAR females were stratified by estrous cycle stage, the group that started the acoustic stimulation during estrus had five females (45.4 %) with diestrus arrest for several days (11.4 ± 0.89 days) and, eight females (72.7 %) exhibited, at least, two seizure behaviors (1 < cSI < 8). When acoustic stimulation was started in the metestrus stage, six females (54.5 %) exhibited diestrus arrest for several days (10.5 ± 3.27 days). In the metestrus group, ten females (90.9 %) presented five or six seizure episodes (1 < cSI < 8)., Conclusion: Our results showed that chronic audiogenic seizures (audiogenic kindling) affect the estrous cycle of WAR females, resulting in a consistent diestrus arrest for 10-12 days, which is consistent with the phenomenon of pseudopregnancy., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
- Full Text
- View/download PDF
49. The relationship between obesity-related H19DMR methylation and H19 and IGF2 gene expression on offspring growth and body composition.
- Author
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Argentato PP, Marchesi JAP, Dejani NN, Nakandakare PY, Teles LFDS, Batista LPR, Leitão MPC, Luzia LA, Ramos ES, and Rondó PH
- Abstract
Background and Objective: Imprinted genes are important for the offspring development. To assess the relationship between obesity-related H19DMR methylation and H19 and IGF2 gene expression and offspring growth and body composition., Methods: Thirty-nine overweight/obese and 25 normal weight pregnant women were selected from the "Araraquara Cohort Study" according to their pre-pregnancy BMI. Fetal growth and body composition and newborn growth were assessed, respectively, by ultrasound and anthropometry. The methylation of H19DMR in maternal blood, cord blood, maternal decidua and placental villi tissues was evaluated by methylation-sensitive restriction endonuclease qPCR, and H19 and IGF2 expression by relative real-time PCR quantification. Multiple linear regression models explored the associations of DNA methylation and gene expression with maternal, fetal, and newborn parameters., Results: H19DMR was less methylated in maternal blood of the overweight/obese group. There were associations of H19DMR methylation in cord blood with centiles of fetal biparietal diameter (BPD) and abdominal subcutaneous fat thickness and newborn head circumference (HC); H19DMR methylation in maternal decidua with fetal occipitofrontal diameter (OFD), HC, and length; H19DMR methylation in placental villi with fetal OFD, HC and abdominal subcutaneous fat thickness and with newborn HC. H19 expression in maternal decidua was associated with fetal BPD and femur length centiles and in placental villi with fetal OFD and subcutaneous arm fat. IGF2 expression in maternal decidua was associated with fetal BPD and in placental villi with fetal OFD., Conclusion: To our knowledge, this is the first study to demonstrate associations of imprinted genes variations at the maternal-fetal interface of the placenta and in cord blood with fetal body composition, supporting the involvement of epigenetic mechanisms in offspring growth and body composition., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Argentato, Marchesi, Dejani, Nakandakare, Teles, Batista, Leitão, Luzia, Ramos and Rondó.)
- Published
- 2023
- Full Text
- View/download PDF
50. Oral Rehabilitation of a Child with Hypohidrotic Ectodermal Dysplasia.
- Author
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Torres CP, Dos Reis AC, Queiroz AM, Stuani MB, Mira P, Ferreira PS, Gomes-Silva JM, Ramos ES, Huber J, and Borsatto MC
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- Child, Esthetics, Dental, Female, Humans, Anodontia, Ectodermal Dysplasia, Ectodermal Dysplasia 1, Anhidrotic, Tooth Abnormalities
- Abstract
Hypohidrotic ectodermal dysplasia (HED) is a genetic condition characterized by abnormal development of two or more structures of the ectoderm, such as skin, hair, nails, teeth, or sweat glands. The most common dental anomalies are oligodontia and anodontia but taurodontism has also been described. These patients present a decrease of alveolar bone volume and alveolar ridge tapering due to congenitally missing teeth. The purpose of this report is to describe the case of a six-year-old girl diagnosed with HED who presented with conical teeth, taurodontic molars, and multiple agenesis that decreased the patient's self-esteem and social interactions. The proposed treatment was to accomplish an oral rehabilitation that was functional, provided the patient with the ability for correct mastication, good esthetics, and comfort, using restorations and devices that did not interfere with the child's orofacial growth and development. (J Dent Child 2019;86(3):158-63).
- Published
- 2019
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