Base Excision Repair
Mostrando 1-12 de 306 artigos, teses e dissertações.
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1. Functional complementation of Leishmania (Leishmania) amazonensis AP endonuclease gene (lamap) in Escherichia coli mutant strains challenged with DNA damage agents
During its life cycle Leishmania spp. face several stress conditions that can cause DNA damages. Base Excision Repair plays an important role in DNA maintenance and it is one of the most conserved mechanisms in all living organisms. DNA repair in trypanosomatids has been reported only for Old World Leishmania species. Here the AP endonuclease from Leishmania
Mem. Inst. Oswaldo Cruz. Publicado em: 2016-05
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2. Relationships between chromatin remodeling and DNA damage repair induced by 8-methoxypsoralen and UVA in yeast Saccharomyces cerevisiae
Eukaryotic cells have developed mechanisms to prevent genomic instability, such as DNA damage detection and repair, control of cell cycle progression and cell death induction. The bifunctional compound furocumarin 8-methoxy-psoralen (8-MOP) is widely used in the treatment of various inflammatory skin diseases. In this review, we summarize recent data about t
Genet. Mol. Biol.. Publicado em: 2012
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3. Alterations in DNA repair gene expression and their possible regulation in rat-liver regeneration
Rapidly proliferating tissue may require enhanced DNA repair capacity in order to avoid fixation of promutagenic DNA lesions to mutations. Partial hepatectomy (PH) triggers cell proliferation during liver regeneration (LR). However, little is known on how DNA repair genes change and how they are regulated at the transcriptional level during LR. In the presen
Genetics and Molecular Biology. Publicado em: 08/04/2011
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4. Participação de enzimas de reparo por excisão de bases na restauração de lesões induzidas pela associação da radiação ultravioleta A e cloreto estanoso em Escherichia coli / Involvement of base excision repair enzymes in restoring ultraviolet A and stannous chloride induced lesions in Escherichia coli
Stannous chloride (SnCl2) and ultraviolet radiation A (UVA) are able to induce lesions in different cellular structures, including DNA, manly through ROS generation. The aim of this work was to study the mutagenesis and repair of lesions induced by the association of UVA (pre treatment) with SnCl2. It was evaluated the action of base excision repair (BER) en
Publicado em: 2010
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5. XRCC1 gene polymorphisms in a population sample and in women with a family history of breast cancer from Rio de Janeiro (Brazil)
The X-ray repair cross-complementing Group1 (XRCC1) gene has been defined as essential in the base excision repair (BER) and single-strand break repair processes. This gene is highly polymorphic, and the most extensively studied genetic changes are in exon 6 (Arg194Trp) and in exon 10 (Arg399Gln). These changes, in conserved protein sites, may alter the base
Genetics and Molecular Biology. Publicado em: 2009
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6. 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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7. Assessment of cellular responses mediated by temozolomide combined with metoxiamina, an inhibitor of DNA repair, in glioblastoma cell lines. / Avaliação da resposta celular mediada pelo quimioterápico temozolomida associada ao inibidor do reparo do DNA metoxiamina em linhagens de glioblastoma.
Gliomas represent more than 70% of primary brain tumors. Even following an aggressive therapies, the mean survival rate of patients with these tumors is less than one year after diagnosis. Chemotherapy based on alkyklating agents, such as temozolomide (TMZ) has been reported to increase the survival rate. N7-metyl-G and N3-metyl-A adducts comprise more than
Publicado em: 2009
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8. Polymorphisms of the DNA repair genes XRCC1 and XRCC3 in a Brazilian population
In several DNA repair genes, polymorphisms may result in reduced repair capacity, which has been implicated as a risk factor for various types of cancer. The frequency of the polymorphic alleles varies among populations, suggesting an ethnic distribution of genotypes. We genotyped 300 healthy Southeastern Brazilian individuals (262 of European ancestry and 3
Genetics and Molecular Biology. Publicado em: 2005-09
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9. Several pathways of hydrogen peroxide action that damage the E. coli genome
Hydrogen peroxide is an important reactive oxygen species (ROS) that arises either during the aerobic respiration process or as a by-product of water radiolysis after exposure to ionizing radiation. The reaction of hydrogen peroxide with transition metals imposes on cells an oxidative stress condition that can result in damage to cell components such as prot
Genetics and Molecular Biology. Publicado em: 2004
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10. Base excision repair in sugarcane
Danos no DNA podem ser induzidos por um grande número de agentes físicos e químicos presentes no ambiente, como também por compostos produzidos pelo próprio metabolismo celular. Estes danos podem interferir com processos celulares como replicação e transcrição, levando a morte celular e/ou mutações. Os baixos níveis de mutação nas células são
Genetics and Molecular Biology. Publicado em: 2001-12
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11. Base Excision Repair Is Limited by Different Proteins in Male Germ Cell Nuclear Extracts Prepared from Young and Old Mice
The combined observations of elevated DNA repair gene expression, high uracil-DNA glycosylase-initiated base excision repair, and a low spontaneous mutant frequency for a lacI transgene in spermatogenic cells from young mice suggest that base excision repair activity is high in spermatogenic cell types. Notably, the spontaneous mutant frequency of the lacI t
American Society for Microbiology.
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12. DNA base excision repair of uracil residues in reconstituted nucleosome core particles
The human base excision repair machinery must locate and repair DNA base damage present in chromatin, of which the nucleosome core particle is the basic repeating unit. Here, we have utilized fragments of the Lytechinus variegatus 5S rRNA gene containing site-specific U:A base pairs to investigate the base excision repair pathway in reconstituted nucleosome
Oxford University Press.