RESUMO
BACKGROUND: The CLEFT-Q, a questionnaire developed and validated specifically for cleft patients, contains seven appearance scales. The International Consortium of Health Outcomes Measurement (ICHOM) has incorporated only some CLEFT-Q appearance scales in the Standard Set to minimize burden. This study evaluates which appearance scales provide the most meaningful information in the different cleft types at specific ages, for the most efficient cleft appearance outcome assessment. METHODS: Within this international multicenter study, outcomes of the seven appearance scales were collected, either as part of the ICHOM Standard Set, or as part of the field test study performed to validate the CLEFT-Q. Analyses were performed in separate age groups and cleft types, and involved univariate regression analyses, trend analyses, t tests, correlations, and floor and ceiling effects. RESULTS: A total of 3116 patients were included. Scores for most appearance scales showed a downward trend by age group, with the exception of the Teeth and Jaw scales. In all cleft types, several scales correlated strongly with each other. No floor effects were observed, but ceiling effects were found in several scales in different age groups, most often in the CLEFT-Q Jaw scale. CONCLUSIONS: A proposition for the most meaningful and efficient appearance outcome assessment in cleft patients is made. It was composed so that recommendations are of value for different cleft protocols and initiatives. Suggestions for the use of scales in the ICHOM Standard Set at different ages are given, and also from a clinical perspective. Use of the CLEFT-Q Scar, Lips, and Nose scales will provide additional relevant information.
Assuntos
Fenda Labial , Fissura Palatina , Humanos , Fissura Palatina/cirurgia , Fenda Labial/cirurgia , Medidas de Resultados Relatados pelo Paciente , Lábio , Avaliação de Resultados em Cuidados de Saúde , Qualidade de VidaRESUMO
The highly conserved DNA glycosylase MutY is implicated in repair of oxidative DNA damage, in particular in removing adenines misincorporated opposite 7,8-dihydro-8-oxoguanine (8-oxo-G). The MutY homologues (MutYH) physically associate with proteins implicated in replication, DNA repair, and checkpoint signaling, specifically with the DNA damage sensor complex 9-1-1 proteins. Here, we ask whether MutYH could have a broader function in sensing and repairing different types of DNA damage induced by conventional chemotherapeutics. Thus, we examined if deletion of the Schizosaccharomyces pombe MutY homologue, Myh1, alone or in combination with deletion of either component of the 9-1-1 sensor complex, influences survival after exposure to different classes of DNA damaging chemotherapeutics that do not act primarily by causing 8-oxoG lesions. We show that Myh1 contributes to survival on genotoxic stresses induced by the oxidizing, DNA double strand break-inducing, bleomycins, or the DNA crosslinking platinum compounds, particularly in a rad1 mutant background. Exposure of cells to cisplatin leads to a moderate overall accumulation of Myh1 protein. Interestingly, we found that DNA damage induced by phleomycin results in increased chromatin association of Myh1. Further, we demonstrate that Myh1 relocalizes to the nucleus after exposure to hydrogen peroxide or chemotherapeutics, most prominently seen after phleomycin treatment. These observations indicate a wider role of Myh1 in DNA repair and DNA damage-induced checkpoint activation than previously thought.
Assuntos
Antineoplásicos/toxicidade , Reagentes de Ligações Cruzadas/toxicidade , DNA Glicosilases/metabolismo , Reparo do DNA/fisiologia , DNA Fúngico/efeitos dos fármacos , Proteínas de Schizosaccharomyces pombe/metabolismo , Transporte Ativo do Núcleo Celular/efeitos dos fármacos , Western Blotting , Cisplatino/toxicidade , DNA Glicosilases/genética , Imunofluorescência , Deleção de Genes , Viabilidade Microbiana/efeitos dos fármacos , Microscopia de Fluorescência , Compostos Organoplatínicos/toxicidade , Oxaliplatina , Fleomicinas/toxicidade , Proteínas de Schizosaccharomyces pombe/genéticaRESUMO
The DNA glycosylase MutY is strongly conserved in evolution, and homologs are found in most eukaryotes and prokaryotes examined. This protein is implicated in repair of oxidative DNA damage, in particular adenine mispaired opposite 7,8-dihydro-8-oxoguanine. Previous investigations in Escherichia coli, fission yeast, and mammalian cells show an association of mutations in MutY homologs with a mutator phenotype and carcinogenesis. Eukaryotic MutY homologs physically associate with several proteins with a role in replication, DNA repair, and checkpoint signaling, specifically the trimeric 9-1-1 complex. In a genetic investigation of the fission yeast MutY homolog, myh1(+), we show that the myh1 mutation confers a moderately increased UV sensitivity alone and in combination with mutations in several DNA repair genes. The myh1 rad1, and to a lesser degree myh1 rad9, double mutants display a synthetic interaction resulting in enhanced sensitivity to DNA damaging agents and hydroxyurea. UV irradiation of myh1 rad1 double mutants results in severe chromosome segregation defects and visible DNA fragmentation, and a failure to activate the checkpoint. Additionally, myh1 rad1 double mutants exhibit morphological defects in the absence of DNA damaging agents. We also found a moderate suppression of the slow growth and UV sensitivity of rhp51 mutants by the myh1 mutation. Our results implicate fission yeast Myh1 in repair of a wider range of DNA damage than previously thought, and functionally link it to the checkpoint pathway.
Assuntos
DNA Glicosilases/genética , Proteínas de Ligação a DNA/genética , Endonucleases/genética , Genes Fúngicos , Proteínas de Schizosaccharomyces pombe/genética , Schizosaccharomyces/genética , Sequência de Bases , Proteínas de Ciclo Celular/genética , Dano ao DNA , Reparo do DNA/genética , DNA Fúngico/genética , Hidroxiureia/farmacologia , Dados de Sequência Molecular , Mutação , Tolerância a Radiação/genética , Schizosaccharomyces/efeitos dos fármacos , Schizosaccharomyces/metabolismo , Schizosaccharomyces/efeitos da radiação , Raios UltravioletaRESUMO
Saccharomyces cerevisiae cells contain three omega-class glutathione transferases with glutaredoxin activity (Gto1, Gto2, and Gto3), in addition to two glutathione transferases (Gtt1 and Gtt2) not classifiable into standard classes. Gto1 is located at the peroxisomes, where it is targeted through a PTS1-type sequence, whereas Gto2 and Gto3 are in the cytosol. Among the GTO genes, GTO2 shows the strongest induction of expression by agents such as diamide, 1-chloro-2,4-dinitrobenzene, tert-butyl hydroperoxide or cadmium, in a manner that is dependent on transcriptional factors Yap1 and/or Msn2/4. Diamide and 1-chloro-2,4-dinitrobenzene (causing depletion of reduced glutathione) also induce expression of GTO1 over basal levels. Phenotypic analyses with single and multiple mutants in the S. cerevisiae glutathione transferase genes show that, in the absence of Gto1 and the two Gtt proteins, cells display increased sensitivity to cadmium. A gto1-null mutant also shows growth defects on oleic acid-based medium, which is indicative of abnormal peroxisomal functions, and altered expression of genes related to sulfur amino acid metabolism. As a consequence, growth of the gto1 mutant is delayed in growth medium without lysine, serine, or threonine, and the mutant cells have low levels of reduced glutathione. The role of Gto1 at the S. cerevisiae peroxisomes could be related to the redox regulation of the Str3 cystathionine beta-lyase protein. This protein is also located at the peroxisomes in S. cerevisiae, where it is involved in transulfuration of cysteine into homocysteine, and requires a conserved cysteine residue for its biological activity.