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1.
Psychiatr Psychol Law ; 27(3): 366-385, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33071546

RESUMEN

A recent New Jersey Supreme Court decision recognized the difficulty jurors have with evaluating eyewitness evidence. This decision resulted in the development of instructions that highlight factors affecting identification accuracy. Research has explored the efficacy of eyewitness instructions for improving jurors' decision-making. Jurors in these studies are typically presented with identifications that manipulate multiple witnessing and identification conditions simultaneously, making it difficult to ascertain whether instructions help jurors evaluate any one eyewitness factor. We conducted two experiments to examine how jurors evaluate eight individual eyewitness factors with and without instructions. Across both experiments, none of the individual eyewitness factors nor instructions influenced jurors. Instructions only assisted jurors when multiple eyewitness factors were collapsed to create either extremely good or poor-quality identifications. These findings contribute to the long history of jurors remaining largely insensitive to the nuances of witnessing and identification conditions. Current safeguards may only assist jurors under limited circumstances.

2.
Psychiatr Psychol Law ; 26(1): 87-96, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31984066

RESUMEN

Classic studies on judge-juror agreement have converged on the finding that judges and jurors agree on the outcomes in most cases (71-75%). This study extends these findings by comparing trial process evaluations of judges, jurors and litigants in actual civil trials. The results suggest that judges and juries largely overlap in their perceptions of trial process measures (e.g. case complexity). However, judicial and jury perceptions often differ from litigants' perceptions. The way in which different perspectives of the trial process predict satisfaction with the outcome is also explored. Litigant, but not judicial or jury, perceptions of the trial process were found to predict satisfaction. These results support past research concerning judge-juror agreement, but suggest there is less agreement between objective (i.e. judges and jurors) and subjective (i.e. litigants) perspectives of the trial process.

3.
Psychiatr Psychol Law ; 25(2): 257-272, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-31984019

RESUMEN

Evidence is mixed on whether or not laypersons have sufficient knowledge of false confession risk factors. Procedural safeguards such as judicial instructions may assist jurors who are unable to effectively evaluate confession evidence. Participants were randomly assigned to one of five conditions that varied in the quality of a confession and the presence of instructions on coercive interrogation techniques. The results indicate that instructions induce sensitivity by altering verdict decisions and perceptions of evidence strength and confession voluntariness in line with the quality of the interrogation. Furthermore, the presence of instructions in low-quality interrogations resulted in participants completely discounting the confession. These findings suggest that research-based instructions on coercive interrogation techniques may be an effective safeguard against the use of potentially unreliable confession evidence.

4.
Hum Mol Genet ; 22(24): 5075-82, 2013 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-23904454

RESUMEN

Recent genome-wide association studies (GWASs) have identified common variants at 16 autosomal regions influencing the risk of developing colorectal cancer (CRC). To decipher the genetic basis of the association signals at these loci, we performed a meta-analysis of data from five GWASs, totalling 5626 cases and 7817 controls, using imputation to recover un-typed genotypes. To enhance our ability to discover low-frequency risk variants, in addition to using 1000 Genomes Project data as a reference panel, we made use of high-coverage sequencing data on 253 individuals, 199 with early-onset familial CRC. For 13 of the regions, it was possible to refine the association signal identifying a smaller region of interest likely to harbour the functional variant. Our analysis did not provide evidence that any of the associations at the 16 loci being a consequence of synthetic associations rather than linkage disequilibrium with a common risk variant.


Asunto(s)
Neoplasias Colorrectales/genética , Predisposición Genética a la Enfermedad , Penetrancia , Adulto , Anciano , Alelos , Estudios de Casos y Controles , Mapeo Cromosómico , Frecuencia de los Genes , Sitios Genéticos , Estudio de Asociación del Genoma Completo , Genotipo , Humanos , Persona de Mediana Edad , Polimorfismo de Nucleótido Simple
5.
Hum Mol Genet ; 21(4): 934-46, 2012 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-22076443

RESUMEN

In genome-wide association studies (GWASs) of colorectal cancer, we have identified two genomic regions in which pairs of tagging-single nucleotide polymorphisms (tagSNPs) are associated with disease; these comprise chromosomes 1q41 (rs6691170, rs6687758) and 12q13.13 (rs7163702, rs11169552). We investigated these regions further, aiming to determine whether they contain more than one independent association signal and/or to identify the SNPs most strongly associated with disease. Genotyping of additional sample sets at the original tagSNPs showed that, for both regions, the two tagSNPs were unlikely to identify a single haplotype on which the functional variation lay. Conversely, one of the pair of SNPs did not fully capture the association signal in each region. We therefore undertook more detailed analyses, using imputation, logistic regression, genealogical analysis using the GENECLUSTER program and haplotype analysis. In the 1q41 region, the SNP rs11118883 emerged as a strong candidate based on all these analyses, sufficient to account for the signals at both rs6691170 and rs6687758. rs11118883 lies within a region with strong evidence of transcriptional regulatory activity and has been associated with expression of PDGFRB mRNA. For 12q13.13, a complex situation was found: SNP rs7972465 showed stronger association than either rs11169552 or rs7136702, and GENECLUSTER found no good evidence for a two-SNP model. However, logistic regression and haplotype analyses supported a two-SNP model, in which a signal at the SNP rs706793 was added to that at rs11169552. Post-GWAS fine-mapping studies are challenging, but the use of multiple tools can assist in identifying candidate functional variants in at least some cases.


Asunto(s)
Cromosomas Humanos Par 12/genética , Cromosomas Humanos Par 1/genética , Neoplasias Colorrectales/genética , Predisposición Genética a la Enfermedad/genética , Polimorfismo de Nucleótido Simple/genética , Mapeo Cromosómico , Biología Computacional , Estudio de Asociación del Genoma Completo , Técnicas de Genotipaje , Haplotipos , Humanos , Modelos Logísticos , Programas Informáticos
6.
Gastroenterology ; 144(1): 53-5, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-22999960

RESUMEN

Several single-nucleotide polymorphisms (SNPs) have been associated with colorectal cancer (CRC) susceptibility. Most CRCs arise from adenomas, and SNPs therefore might affect predisposition to CRC by increasing adenoma risk. We found that 8 of 18 known CRC-associated SNPs (rs10936599, rs6983267, rs10795668, rs3802842, rs4444235, rs1957636, rs4939827, and rs961253) were over-represented in CRC-free patients with adenomas, compared with controls. Ten other CRC-associated SNPs (rs6691170, rs6687758, rs16892766, rs7136702, rs11169552, rs4779584, rs9929218, rs10411210, rs4813802, and rs4925386) were not associated significantly with adenoma risk. Genetic susceptibility to CRC in the general population is likely to be mediated in part by predisposition to adenomas.


Asunto(s)
Adenoma/genética , Carcinoma/genética , Neoplasias Colorrectales/genética , Predisposición Genética a la Enfermedad , Alelos , Estudios de Casos y Controles , Femenino , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Polimorfismo de Nucleótido Simple
7.
PLoS Genet ; 7(6): e1002105, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21655089

RESUMEN

Genome-wide association studies (GWAS) have identified 14 tagging single nucleotide polymorphisms (tagSNPs) that are associated with the risk of colorectal cancer (CRC), and several of these tagSNPs are near bone morphogenetic protein (BMP) pathway loci. The penalty of multiple testing implicit in GWAS increases the attraction of complementary approaches for disease gene discovery, including candidate gene- or pathway-based analyses. The strongest candidate loci for additional predisposition SNPs are arguably those already known both to have functional relevance and to be involved in disease risk. To investigate this proposition, we searched for novel CRC susceptibility variants close to the BMP pathway genes GREM1 (15q13.3), BMP4 (14q22.2), and BMP2 (20p12.3) using sample sets totalling 24,910 CRC cases and 26,275 controls. We identified new, independent CRC predisposition SNPs close to BMP4 (rs1957636, P = 3.93×10(-10)) and BMP2 (rs4813802, P = 4.65×10(-11)). Near GREM1, we found using fine-mapping that the previously-identified association between tagSNP rs4779584 and CRC actually resulted from two independent signals represented by rs16969681 (P = 5.33×10(-8)) and rs11632715 (P = 2.30×10(-10)). As low-penetrance predisposition variants become harder to identify-owing to small effect sizes and/or low risk allele frequencies-approaches based on informed candidate gene selection may become increasingly attractive. Our data emphasise that genetic fine-mapping studies can deconvolute associations that have arisen owing to independent correlation of a tagSNP with more than one functional SNP, thus explaining some of the apparently missing heritability of common diseases.


Asunto(s)
Proteína Morfogenética Ósea 2/genética , Proteína Morfogenética Ósea 4/genética , Neoplasias Colorrectales/genética , Predisposición Genética a la Enfermedad , Péptidos y Proteínas de Señalización Intercelular/genética , Anciano , Proteína Morfogenética Ósea 2/metabolismo , Proteína Morfogenética Ósea 4/metabolismo , Estudios de Casos y Controles , Neoplasias Colorrectales/metabolismo , Frecuencia de los Genes , Variación Genética , Estudio de Asociación del Genoma Completo , Humanos , Masculino , Persona de Mediana Edad , Polimorfismo de Nucleótido Simple , Carácter Cuantitativo Heredable , Transducción de Señal
8.
Hum Mol Genet ; 20(14): 2879-88, 2011 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-21531788

RESUMEN

We have previously identified several colorectal cancer (CRC)-associated polymorphisms using genome-wide association (GWA) analysis. We sought to fine-map the location of the functional variants for three of these regions at 8q23.3 (EIF3H), 16q22.1 (CDH1/CDH3) and 19q13.11 (RHPN2). We genotyped two case-control sets at high density in the selected regions and used existing data from four other case-control sets, comprising a total of 9328 CRC cases and 10 480 controls. To improve marker density, we imputed genotypes from the 1000 Genomes Project and Hapmap3 data sets. All three regions contained smaller areas in which a cluster of single nucleotide polymorphisms (SNPs) showed clearly stronger association signals than surrounding SNPs, allowing us to assign those areas as the most likely location of the disease-associated functional variant. Further fine-mapping within those areas was generally unhelpful in identifying the functional variation based on strengths of association. However, functional annotation suggested a relatively small number of functional SNPs, including some with potential regulatory function at 8q23.3 and 16q22.1 and a non-synonymous SNP in RPHN2. Interestingly, the expression quantitative trait locus browser showed a number of highly associated SNP alleles correlated with mRNA expression levels not of EIF3H and CDH1 or CDH3, but of UTP23 and ZFP90, respectively. In contrast, none of the top SNPs within these regions was associated with transcript levels at EIF3H, CDH1 or CDH3. Our post-GWA study highlights benefits of fine-mapping of common disease variants in combination with publicly available data sets. In addition, caution should be exercised when assigning functionality to candidate genes in regions discovered through GWA analysis.


Asunto(s)
Mapeo Cromosómico , Cromosomas Humanos Par 16/genética , Cromosomas Humanos Par 19/genética , Cromosomas Humanos Par 8/genética , Neoplasias Colorrectales/genética , Genes Relacionados con las Neoplasias , Polimorfismo de Nucleótido Simple , Estudios de Casos y Controles , Cromosomas Humanos Par 16/metabolismo , Cromosomas Humanos Par 19/metabolismo , Cromosomas Humanos Par 8/metabolismo , Neoplasias Colorrectales/metabolismo , Femenino , Estudio de Asociación del Genoma Completo , Humanos , Masculino
9.
J Med Genet ; 49(3): 158-63, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-22282540

RESUMEN

Five single nucleotide polymorphisms (SNPs) associated with thyroid cancer (TC) risk have been reported: rs2910164 (5q24); rs6983267 (8q24); rs965513 and rs1867277 (9q22); and rs944289 (14q13). Most of these associations have not been replicated in independent populations and the combined effects of the SNPs on risk have not been examined. This study genotyped the five TC SNPs in 781 patients recruited through the TCUKIN study. Genotype data from 6122 controls were obtained from the CORGI and Wellcome Trust Case-Control Consortium studies. Significant associations were detected between TC and rs965513A (p=6.35×10(-34)), rs1867277A (p=5.90×10(-24)), rs944289T (p=6.95×10(-7)), and rs6983267G (p=0.016). rs6983267 was most strongly associated under a recessive model (P(GG vs GT + TT)=0.004), in contrast to the association of this SNP with other cancer types. However, no evidence was found of an association between rs2910164 and disease under any risk model (p>0.7). The rs1867277 association remained significant (p=0.008) after accounting for genotypes at the nearby rs965513 (p=2.3×10(-13)) and these SNPs did not tag a single high risk haplotype. The four validated TC SNPs accounted for a relatively large proportion (∼11%) of the sibling relative risk of TC, principally owing to the large effect size of rs965513 (OR 1.74).


Asunto(s)
Cromosomas Humanos Par 14/genética , Cromosomas Humanos Par 5/genética , Cromosomas Humanos Par 8/genética , Cromosomas Humanos Par 9/genética , Genes Recesivos , Predisposición Genética a la Enfermedad , Neoplasias de la Tiroides/genética , Estudios de Asociación Genética , Sitios Genéticos , Haplotipos , Humanos , Desequilibrio de Ligamiento , MicroARNs/genética , Polimorfismo de Nucleótido Simple , Análisis de Secuencia de ADN
10.
Int J Offender Ther Comp Criminol ; : 306624X221133007, 2022 Nov 14.
Artículo en Inglés | MEDLINE | ID: mdl-36373661

RESUMEN

In 2014, Pickett and Baker cast doubt on the scholarly consensus that Americans are pragmatic about criminal justice. Previous research suggested this pragmaticism was evidenced by either null or positive relationships between seemingly opposite items (i.e., between dispositional and situational crime attributions and between punitiveness and rehabilitative policy support). Pickett and Baker argued that because these studies worded survey items in the same positive direction, respondents' susceptibility to acquiescence bias led to artificially inflated positive correlations. Using a simple split-ballot experiment, they manipulated the direction of survey items and demonstrated bidirectional survey items resulted in negative relationships between attributions and between support for punitive and rehabilitative policies. We replicated Pickett and Baker's methodology with a nationally representative sample of American respondents supplemented by a diverse student sample. Our results were generally consistent, and, in many cases, effect sizes were stronger than those observed in the original study. Americans appear much less pragmatic when survey items are bidirectional. Yet, we suggest the use of bidirectional over unidirectional survey items trades one set of problems for another. Instead, to reduce acquiescence bias and improve overall data quality, we encourage researchers to adopt item-specific questioning.

11.
Genet Med ; 13(2): 155-60, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21233718

RESUMEN

PURPOSE: Lynch syndrome accounts for 2-4% of all colorectal cancer, and is mainly caused by germline mutations in the DNA mismatch repair genes. Our aim was to characterize the genetic mutation responsible for Lynch syndrome in an extensive Colombian family and to study its prevalence in Antioquia. METHODS: A Lynch syndrome family fulfilling Amsterdam criteria II was studied by immunohistochemistry and by multiplex ligation-dependent probe amplification (MLPA). Results were confirmed by additional independent MLPA, Southern blotting, and sequencing. RESULTS: Index case tumor immunohistochemistry results were MLH1-, MSH2+, MSH6+, and PMS2-. MLPA analysis detected a duplication of exons 12 and 13 of MLH1. This mutation was confirmed and characterized precisely to span 4219 base pairs. Duplication screening in this family led to the identification of six additional carriers and 13 noncarriers. We also screened 123 early-onset independent colorectal cancer cases from the same area and identified an additional unrelated carrier. CONCLUSION: A novel duplication of exons 12 and 13 of the MLH1 gene was detected in two independent Lynch syndrome families from Colombia. A putative founder effect and prescreening Lynch syndrome Antioquia families for this specific mutation before thorough mismatch repair mutational screening could be suggested.


Asunto(s)
Proteínas Adaptadoras Transductoras de Señales/genética , Neoplasias Colorrectales Hereditarias sin Poliposis/genética , Neoplasias Colorrectales/genética , Duplicación de Gen , Proteínas Nucleares/genética , Adenosina Trifosfatasas/genética , Antígenos de Neoplasias/genética , Moléculas de Adhesión Celular/genética , Colombia , Reparación de la Incompatibilidad de ADN/genética , Enzimas Reparadoras del ADN/genética , Proteínas de Unión al ADN/genética , Molécula de Adhesión Celular Epitelial , Femenino , Mutación de Línea Germinal , Humanos , Inmunohistoquímica , Inestabilidad de Microsatélites , Endonucleasa PMS2 de Reparación del Emparejamiento Incorrecto , Homólogo 1 de la Proteína MutL , Proteína 2 Homóloga a MutS/genética , Linaje
12.
Breast Cancer Res Treat ; 119(2): 437-42, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19390964

RESUMEN

A polymorphic 9-bp deletion in exon 1 of TGFBR1 (TGFBR1*6A) has been identified as a low-penetrance cancer susceptibility allele. The strongest association in the initial studies was with breast cancer; however, these studies included patients with different types of cancer, including colon, cervical and breast carcinomas, with only a small proportion being breast cancer patients. In subsequent case-control studies focussing on breast cancer alone, the results have been equivocal. In order to clarify whether TGFBR1*6A is associated with breast cancer risk, we have genotyped this polymorphism in 988 breast cancer cases and 1,016 controls from the West of Ireland and also performed a meta-analysis of previously published data (5,150 cases and 6,344 controls). In our series from the West of Ireland, we found no association (genotypic odds ratio (OR) under a dominant model = 0.93, 95% confidence interval (CI) 0.73-1.19, P = 0.57; allelic OR = 0.93, 95% CI 0.74-1.15, P = 0.49). Meta-analysis showed evidence of heterogeneity among studies. Using the random effects model, it was found that there was no evidence of an association of the *6A allele with breast cancer (genotypic OR under a dominant model = 1.10, 95% CI = 0.94-1.28, P = 0.24, allelic OR = 1.12, 95% CI 0.97-1.31, P = 0.13). In conclusion, our study shows that there is no association between TGFBR1*6A and breast cancer risk.


Asunto(s)
Neoplasias de la Mama/genética , Polimorfismo Genético , Proteínas Serina-Treonina Quinasas/genética , Receptores de Factores de Crecimiento Transformadores beta/genética , Adulto , Anciano , Anciano de 80 o más Años , Estudios de Casos y Controles , Exones , Femenino , Frecuencia de los Genes , Predisposición Genética a la Enfermedad , Humanos , Irlanda , Persona de Mediana Edad , Oportunidad Relativa , Receptor Tipo I de Factor de Crecimiento Transformador beta , Medición de Riesgo , Factores de Riesgo , Adulto Joven
13.
Breast Cancer Res Treat ; 117(1): 151-9, 2009 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-19005751

RESUMEN

Large scale association studies have identified low penetrance susceptibility alleles that predispose to breast cancer. A locus on chromosome 8q24.21 has been shown to harbour variants that predispose to breast, ovarian, colorectal and prostate cancer. The finding of risk variants clustering at 8q24 suggests that there may be common susceptibility alleles that predispose to more than one epithelial cancer. The aim of this study was firstly to determine whether previously identified breast cancer susceptibility alleles are associated with sporadic breast cancer in the West of Ireland and secondly to ascertain whether there are susceptibility alleles that predispose to all three common epithelial cancers (breast, prostate, colon). We genotyped a panel of 24 SNPs that have recently been shown to predispose to prostate, colorectal or breast cancer in 988 sporadic breast cancer cases and 1,016 controls from the West of Ireland. We then combined our data with publicly available datasets using standard techniques of meta-analysis. The known breast cancer SNPs rs13281615, rs2981582 and rs3803662 were confirmed as associated with breast cancer risk (P (allelic test) = 1.8 x 10(-2), OR = 1.17; P (allelic test) = 2.2 x 10(-3), OR = 1.22; P (allelic test) = 5.1 x 10(-2), OR = 1.15, respectively) in the West of Ireland cohort. For the remaining five breast cancer SNPs that were studied there was no evidence of an association with breast cancer in the West Ireland population (P (allelic test) > 6.5 x 10(-2)). There was also no association between any of the prostate or colorectal susceptibility SNPs, whether at 8q24 or elsewhere, with breast cancer risk. Meta-analysis confirmed that all susceptibility SNPs were site specific, with the exception of rs6983269 which is known to predispose to both colorectal and prostate cancer. This study confirms that susceptibility loci at FGFR2, 8q24 and TNCR9 predispose to sporadic breast cancer in the West of Ireland. It also suggests that low penetrance susceptibility SNPs for breast, prostate and colorectal cancer are distinct. Although 8q24 harbours variants that predispose to all three cancers, the susceptibility loci within the region appear to be specific for the different cancer types with the exception of rs6983269 in colon and prostate cancer.


Asunto(s)
Neoplasias de la Mama/genética , Predisposición Genética a la Enfermedad , Penetrancia , Polimorfismo de Nucleótido Simple , Neoplasias de la Mama/epidemiología , Femenino , Estudio de Asociación del Genoma Completo , Genotipo , Humanos , Irlanda , Persona de Mediana Edad
14.
Oncogene ; 24(1): 118-29, 2005 Jan 06.
Artículo en Inglés | MEDLINE | ID: mdl-15531920

RESUMEN

Microsatellite-stable, near-diploid (MSI-CIN-) colorectal carcinomas have been reported, but it is not clear as to whether these tumours form a discrete group or represent one end of the distribution of MSI-CIN+ cancers. In order to address this question, we screened 23 MSI-CIN- colorectal cancers for gains and losses using array-based comparative genomic hybridization (aCGH) based on large-insert clones at about 1 Mb density. We compared our findings with those from a small set of MSI+CIN+ cancers, and with our reported data from MSI-CIN+ and MSI+CIN- cancers. We found no evidence of any form of genomic instability in MSI-CIN- cancers. At the level of the chromosome arm, the MSI-CIN- cancers had significantly fewer gains and losses than MSI-CIN+ tumours, but more than the MSI+CIN- and MSI+CIN+ lesions. The chromosomal-scale changes found in MSI-CIN- cancers generally involved the same sites as those in MSI-CIN+ tumours, and in both cancer groups, the best predictor of a specific change was the total number of such changes in that tumour. A few chromosomal-scale changes did, however, differ between the MSI-CIN- and MSI-CIN+ pathways. MSI-CIN- cancers showed: low frequencies of gain of 9p and 19p; infrequent loss of 5q and a high frequency of 20p gain. Overall, our data suggested that the MSI-CIN- group is heterogeneous, one type of MSI-CIN- cancer having few (< or =6) chromosomal-scale changes and the other with more (> or =10) changes resembling MSI-CIN+ cancers. At the level of individual clones, frequent and/or discrete gains or losses were generally located within regions of chromosomal-scale changes in both MSI-CIN- and MSI-CIN+ cancers, and fewer losses and gains were present in MSI-CIN- than MSI-CIN+ tumours. No changes by clone, which were specific to the MSI-CIN- cancers, were found. In addition to indicating differences among the cancer groups, our results also detected over 50 sites (amplifications, potential homozygous deletion and gains or losses which extended over only a few megabases) which might harbour uncharacterized oncogenes or tumour suppressor loci. In conclusion, our data support the suggestion that some MSI-CIN- carcinomas form a qualitatively different group from the other cancer types, and also suggest that the MSI-CIN- group is itself heterogeneous.


Asunto(s)
Carcinoma/genética , Aberraciones Cromosómicas , Neoplasias Colorrectales/genética , Diploidia , Repeticiones de Microsatélite , Carcinoma/metabolismo , Neoplasias Colorrectales/metabolismo , Humanos , Análisis de Secuencia por Matrices de Oligonucleótidos
15.
J Clin Endocrinol Metab ; 91(8): 3071-5, 2006 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-16757530

RESUMEN

CONTEXT: Leydig cell tumors (LCTs) are the most common non-germ-cell neoplasms of the testis. LCTs are often hormonally active and can result in precocious virilization or in adult feminization. We identified an LCT in an affected individual from a kindred with hereditary leiomyomatosis and renal cell cancer (HLRCC) and a germline fumarate hydratase (FH) mutation (N64T). OBJECTIVE: Our objective was to investigate the role of FH mutations in predisposition to LCTs. DESIGN: We tested for pathogenic effects of the N64T mutation and screened an additional 29 unselected adult LCTs for FH alterations. We also tested these LCTs for mutations in two genes, the LH/choriogonadotropin receptor (LHCGR) and the guanine nucleotide-binding protein alpha (GNAS) that had been implicated in LCT tumorigenesis. RESULTS: No mutations were found in GNAS, and one tumor had a LHCGR somatic substitution. In addition to the HLRCC case with the N64T germline FH mutation, we identified one other LCT with a previously unreported FH mutation (M411I). Both LCTs from these patients showed loss of the wild-type FH allele. Immunohistochemical and in situ hybridization analyses demonstrated activation of the hypoxia/angiogenesis pathway not only in the tumors belonging to the FH mutation carriers but also in several other mutation-negative LCTs. CONCLUSIONS: Our study shows that some LCTs are caused by FH mutations and represents one of the first reports of germline mutations in any type of adult testicular tumor.


Asunto(s)
Fumarato Hidratasa/genética , Predisposición Genética a la Enfermedad , Mutación de Línea Germinal , Tumor de Células de Leydig/genética , Neoplasias Testiculares/genética , Secuencia de Bases , Cromograninas , ADN Complementario/química , Subunidades alfa de la Proteína de Unión al GTP Gs/genética , Humanos , Hipoxia , Subunidad alfa del Factor 1 Inducible por Hipoxia/análisis , Inmunohistoquímica , Hibridación in Situ , Tumor de Células de Leydig/química , Masculino , Modelos Moleculares , Neovascularización Patológica , Receptores de HL/genética , Análisis de Secuencia de ADN , Neoplasias Testiculares/química , Factor A de Crecimiento Endotelial Vascular/análisis
16.
Am Heart J ; 152(5): 928-34, 2006 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17070162

RESUMEN

BACKGROUND: Depression in patients with acute coronary syndrome (ACS) is common and independently prognostic of a higher mortality and worse health status. Despite great attention to its prevalence and prognostic import, little is known about how often hospitalized patients with ACS who have significant depressive symptoms are recognized while receiving routine cardiovascular care. METHODS: We performed a cross-sectional study of 1181 consecutive patients with confirmed ACS. Detailed reviews of hospital records were performed for the documentation that depressive symptoms were recognized. Multivariable regression analysis was used to identify factors associated with unrecognized depressive symptoms. RESULTS: The prevalence of moderate/severe depressive symptoms was 17.6%. Only 24.5% had documentation that their depressive symptoms were recognized. In multivariable regression analysis, characteristics associated with unrecognized depressive symptoms were race (minorities vs whites; odds ratio [OR] = 6.73, 95% confidence interval [CI] 2.62-19.33), ejection fraction (EF < 0.40 vs EF > or = 0.40; OR = 3.45, 95% CI 1.06-11.23), and education level (no college vs some college; OR = 2.77, 95% CI 1.38-5.69). CONCLUSIONS: Despite its prognostic importance and prevalence, moderate to severe depressive symptoms are poorly recognized in hospitalized patients with ACS. Better interventions are warranted to increase the recognition and improve the management of depressive symptoms in patients with ACS.


Asunto(s)
Angina Inestable/complicaciones , Depresión/diagnóstico , Depresión/epidemiología , Infarto del Miocardio/complicaciones , Adulto , Anciano , Angina Inestable/terapia , Estudios Transversales , Depresión/complicaciones , Femenino , Hospitalización , Humanos , Masculino , Persona de Mediana Edad , Infarto del Miocardio/terapia , Prevalencia
17.
Oncotarget ; 7(27): 41017-41030, 2016 Jul 05.
Artículo en Inglés | MEDLINE | ID: mdl-27191502

RESUMEN

Melanoma, the most aggressive skin cancer type, is responsible for 75% of skin cancer related deaths worldwide. Given that New Zealand (NZ) has the world's highest melanoma incidence, we sought to determine the frequency of mutations in NZ melanomas in recurrently mutated genes. NZ melanomas were from localities distributed between North (35°S-42°S) and South Islands (41°S-47°S). A total of 529 melanomas were analyzed for BRAF exon 15 mutations by Sanger sequencing, and also by Sequenom MelaCarta MassARRAY. While, a relatively low incidence of BRAFV600E mutations (23.4%) was observed overall in NZ melanomas, the incidence of NRAS mutations in South Island melanomas was high compared to North Island melanomas (38.3% vs. 21.9%, P=0.0005), and to The Cancer Genome Atlas database (TCGA) (38.3% vs. 22%, P=0.0004). In contrast, the incidence of EPHB6G404S mutations was 0% in South Island melanomas, and was 7.8% in North Island (P=0.0002). Overall, these data suggest that melanomas from geographically different regions in NZ have markedly different mutation frequencies, in particular in the NRAS and EPHB6 genes, when compared to TCGA or other populations. These data have implications for the causation and treatment of malignant melanoma in NZ.


Asunto(s)
GTP Fosfohidrolasas/genética , Melanoma/genética , Melanoma/patología , Proteínas de la Membrana/genética , Tasa de Mutación , Receptores de la Familia Eph/genética , Neoplasias Cutáneas/genética , Neoplasias Cutáneas/patología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Geografía , Humanos , Incidencia , Masculino , Melanoma/epidemiología , Persona de Mediana Edad , Metástasis de la Neoplasia , Nueva Zelanda/epidemiología , Neoplasias Cutáneas/epidemiología , Adulto Joven , Melanoma Cutáneo Maligno
18.
Nat Genet ; 45(2): 136-44, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23263490

RESUMEN

Many individuals with multiple or large colorectal adenomas or early-onset colorectal cancer (CRC) have no detectable germline mutations in the known cancer predisposition genes. Using whole-genome sequencing, supplemented by linkage and association analysis, we identified specific heterozygous POLE or POLD1 germline variants in several multiple-adenoma and/or CRC cases but in no controls. The variants associated with susceptibility, POLE p.Leu424Val and POLD1 p.Ser478Asn, have high penetrance, and POLD1 mutation was also associated with endometrial cancer predisposition. The mutations map to equivalent sites in the proofreading (exonuclease) domain of DNA polymerases ɛ and δ and are predicted to cause a defect in the correction of mispaired bases inserted during DNA replication. In agreement with this prediction, the tumors from mutation carriers were microsatellite stable but tended to acquire base substitution mutations, as confirmed by yeast functional assays. Further analysis of published data showed that the recently described group of hypermutant, microsatellite-stable CRCs is likely to be caused by somatic POLE mutations affecting the exonuclease domain.


Asunto(s)
Adenoma/genética , Neoplasias Colorrectales/genética , Reparación de la Incompatibilidad de ADN/genética , ADN Polimerasa III/genética , ADN Polimerasa II/genética , Replicación del ADN/genética , Modelos Moleculares , Exodesoxirribonucleasas/genética , Ligamiento Genético , Estudio de Asociación del Genoma Completo , Mutación de Línea Germinal/genética , Humanos , Repeticiones de Microsatélite/genética , Linaje , Proteínas de Unión a Poli-ADP-Ribosa , Schizosaccharomyces/genética , Análisis de Secuencia de ADN
19.
J Am Podiatr Med Assoc ; 102(4): 290-8, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22826327

RESUMEN

BACKGROUND: Visual estimation (VE) and goniometric measurement (GM) are commonly used to assess first metatarsophalangeal joint dorsiflexion. The purposes of this study were to determine the intrarater and interrater reliability of VE and GM and to establish whether reliability was influenced by the experience of the examiner. METHODS: Ten experienced and ten inexperienced examiners evaluated three real-size photographs of a first metatarsophalangeal joint positioned in various degrees of dorsiflexion on two separate occasions. RESULTS: Experienced examiners demonstrated excellent intrarater and interrater reliability for GM (intraclass correlation coefficient [ICC], >0.953; standard error of measurement [SEM], 1.8°-2.5°) compared with inexperienced examiners, who showed fair-to-good intrarater and interrater reliability (ICC, 0.322-0.597; SEM, 2.0°-3.0°). For VE, inexperienced examiners demonstrated fair-to-good interrater and excellent intra-rater reliability (ICC, 0.666-0.808), which was higher compared with experienced examiners (ICC, 0.167-0.672). The SEM (2.8°-4.4°) was less varied than that of experienced examiners (SEM, 3.8°-6.4°) for VE, but neither group's SEMs were clinically acceptable. CONCLUSIONS: Although minimal differences between intrarater and interrater reliability of GM and VE are noted, this study suggests that GM is more reliable than VE is when used by experienced examiners. These findings support the continued use of GM for first metatarsophalangeal joint dorsiflexion assessment.


Asunto(s)
Artrometría Articular/métodos , Articulación Metatarsofalángica/fisiología , Examen Físico/métodos , Adulto , Femenino , Humanos , Variaciones Dependientes del Observador , Reproducibilidad de los Resultados
20.
Nat Genet ; 44(7): 770-6, 2012 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-22634755

RESUMEN

We performed a meta-analysis of five genome-wide association studies to identify common variants influencing colorectal cancer (CRC) risk comprising 8,682 cases and 9,649 controls. Replication analysis was performed in case-control sets totaling 21,096 cases and 19,555 controls. We identified three new CRC risk loci at 6p21 (rs1321311, near CDKN1A; P = 1.14 × 10(-10)), 11q13.4 (rs3824999, intronic to POLD3; P = 3.65 × 10(-10)) and Xp22.2 (rs5934683, near SHROOM2; P = 7.30 × 10(-10)) This brings the number of independent loci associated with CRC risk to 20 and provides further insight into the genetic architecture of inherited susceptibility to CRC.


Asunto(s)
Neoplasias Colorrectales/genética , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/genética , ADN Polimerasa III/genética , Proteínas de la Membrana/genética , Estudios de Casos y Controles , Sitios Genéticos , Predisposición Genética a la Enfermedad , Variación Genética , Estudio de Asociación del Genoma Completo/métodos , Humanos
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