Mutation Biologia
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Molecular study of Leber s hereditary optic neuropathy in Brazilian patients / Estudo molecular da neuropatia optica hereditaria de Leber em pacientes brasileiros
Nos seres humanos, a visão é o sentido que retrata com melhor fidelidade o ambiente que os cerca. A ausência do sentido da visão é definida como cegueira. As conseqüências da cegueira são problemas de saúde pública importantes, pois têm um impacto significativamente negativo sobre o desenvolvimento econômico e social dos indivíduos afetados. A p
Publicado em: 2010
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14. Estudo molecular em individuos com surdez sensorioneural não-sindromica monoalelicos para mutações no gene GJB2 / Molecular study in subjects with sensorineural nonsyndromic deafness and monoallelics mutations in GJB2 gene
Mutations in the GJB2 gene (Cx26) are the most common cause of autosomal recessive nonsyndromic hearing loss. However, in 10 to 40% of these cases, mutations in Cx26 gene are detected in on1y one allele which causes a problem in molecular diagnostico These findings could be attributed to the existence of mutations in non-coding regions of the gene or mutatio
Publicado em: 2009
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15. Análise de Alterações no Gene Receptor de Andrógeno em homens com infertilidade idiopática / Analysis of changes in the androgen receptor gene in Men with idiopathic infertility
Male idiopathic infertility is related to defects in normal spermatogenesis, due to genetic causes. The spermatogenesis is a dependent process on high levels of male sex hormones, the androgens. The androgen, in turn, perform its function when associated with the androgen receptor (AR), protein encoded by AR gene. Mutation in AR gene lead to a synthesis of n
Publicado em: 2009
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16. Study of modulators genes associated to mutations in mitochondrial genes in individuals with non-syndromic deafness / Estudos de genes moduladores associados a mutações em genes mitocondriais em individuos com surdez não-sindromica
Hearing loss is the most prevalent sensorial deficit in the general population. Congenital deafness occurs in about 1 in 1000 live births, of which approximately 50% has hereditary cause in development countries. Non-syndromic deafness can be caused by mutations in both nuclear and mitochondrial genes. Mutations in mtDNA have been associated with aminoglycos
Publicado em: 2009
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17. Ocorrência de mutações em loci ligados ao cromossomo Y na prole nascida de indivíduos expostos à radiação ionizante / Occurrence of mutations in loci linked to Y chromosome in the offspring born to individuals exposed to ionizing radiation
In September 1987, in Goiânia-GO, Brazil, one of the most serious radiological accidents occurred at a radiotherapy unit involving a source of cesium-137. An area of 2,000 m2 was contaminated and 249 people were exposed, both externally and internally, to substantial doses of ionizing radiation, resulting in four fatalities due to acute radiation syndrome.
Publicado em: 2009
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18. Mutations and polymorphisms analysis in PAX6 gene of patients with Aniridia and Morning Glory Syndrome / Analise de mutações e polimorfismo no gene PAX6 em pacientes com aniridia e sindrome do Morning-Glory
O gene PAX6 é o principal gene para o controle da organização do sistema ocular durante a embriogênese. Este gene pertence a uma família de reguladores de transcrição denominada PAX, sendo que seus membros compartilham um domínio funcional de 128 aminoácidos chamado de paired domain. O PAX6 é o mais bem estudado dessa família. O gene PAX6 está lo
Publicado em: 2009
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19. Triagem de mutação no éxon 3 do gene IRF6 em indivíduos com fissura labiopalatina e agenesia dentária: padronização de protocolo para seqüenciamento de DNA genômico a partir de saliva / Screening of mutation in IRF6 gene of subjects with cleft lip and palate and tooth agenesis: protocol standardization for sequencing of genomic DNA extracted from saliva
Cleft lip and palate and tooth agenesis are considered changes in embryonic development. These phenotypes occur as a result of the interaction of genetic and environmental factors, suggesting a multifactorial inheritance pattern. Among the candidate genes for these phenotypes IRF6 appears as one of the most important. Direct sequencing, among other technique
Publicado em: 2009
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20. Caracterização de dois cDNAs homológos e uma AP endonuclease em cana-de-açúcar
The genome of all organisms is subject to injuries that can be caused by endogenous and environmental factors. If these lesions are not corrected, it can be fixed generating a mutation which can be lethal to the organisms. In order to prevent this, there are different DNA repair mechanisms. These mechanisms are well known in bacteria, yeast, human, but not i
Publicado em: 2009
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21. Analise molecular do loco C4/CYP21 : impacto da variabilidade alelica provocada por recombinações sobre os metodos de avaliação de mutações / Molecular analysis of C4/CYP21 locus : influence of allelic variability caused by recombinations on current methods of mutation detection
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%
Publicado em: 2009
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22. Caracterização molecular da fenilcetonuria em pacientes da região de Campinas / Molecular characterization of phenylketonuria in patients of Campinas region
Phenylketonuria (PKU) is an autosomal recessive genetic disorder caused by deficiency of the hepatic phenylalanine-4-hydroxylase (PAH), which catalyzes hydroxylation of phenylalanine to tyrosine. Deficiency of PAH is caused by mutations in the PAH gene, resulting in high serum levels of phenylalanine and mental retardation. Restriction of phenylalanine intak
Publicado em: 2008
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23. Estudo da etiologia da surdez neurossensorial em recem-nascidos de alto risco / Etiological study of the sensorioneural deafness in high risk newborns
The frequency of sensorioneural hearing loss in high-risk newborns is 20-40 in 1000 births. In many cases, the cause is environmental, due to prenatal, perinatal and postnatal factors, or caused by genetic factors. The main objectives of this project were to determine the etiology of the hearing loss in children admitted into Neonatal Intensive Care Unit (NI
Publicado em: 2008
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24. Estudo genetico em individuos com surdez subita / Molecular studies of sudden deaf
As causas da perda auditiva podem ser genéticas, ambientais ou causadas por comorbidades. As principais comorbidades incluem algumas doenças infecciosas, hematológicas, neurológicas e principalmente o schwannoma vestibular. Por sua vez, a Surdez Súbita caracterizase como uma surdez sensorioneural de 30dB em pelo menos 3 freqüências contínuas, de apar
Publicado em: 2008