Unlabelled: R/qtlbim is an extensible, interactive environment for the Bayesian Interval Mapping of QTL, built on top of R/qtl (Broman et al., 2003), providing Bayesian analysis of multiple interacting quantitative trait loci (QTL) models for continuous, binary and ordinal traits in experimental crosses. It includes several efficient Markov chain Monte Carlo (MCMC) algorithms for evaluating the posterior of genetic architectures, i.e. the number and locations of QTL, their main and epistatic effects and gene-environment interactions. R/qtlbim provides extensive informative graphical and numerical summaries, and model selection and convergence diagnostics of the MCMC output, illustrated through the vignette, example and demo capabilities of R (R Development Core Team 2006).
Availability: The package is freely available from cran.r-project.org.
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http://dx.doi.org/10.1093/bioinformatics/btm011 | DOI Listing |
Dermatitis
January 2025
From the Department of Orthopedics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China.
Eczema and dermatitis are common inflammatory skin conditions with significant morbidity. Identifying drug-targetable genes can facilitate the development of effective treatments. This study analyzed data obtained by meta-analysis of 2 genome-wide association studies on eczema/dermatitis (57,311 cases and 896,779 controls, European ancestry).
View Article and Find Full Text PDFAlzheimers Dement
December 2024
ARC Training Centre in Cognitive Computing for Medical Technologies, Parkville, VIC, Australia.
Background: The modelling of biomarker dynamics in Alzheimer's Disease from cohort studies faces challenges due to the lack of clear temporal points of references and the natural variability across individuals. Mixed-effects models are often used to account for individual differences, but a disease timescale can enable better population-level modelling than age or time since enrolment. Previous literature explored the temporal synchronisation of patients through observed time of conversion to MCI or AD, amyloid positivity, or aligning cognitive trajectories.
View Article and Find Full Text PDFBackground: N-terminal brain natriuretic peptide (NTproBNP) is a marker of cardiac health and a strong predictor of mortality, incident cardiovascular disease (CVD), and sudden cardiac death in community populations. A link between the menopause transition (MT), sex hormones, and NTproBNP has been suggested, though, no studies have formally examined how NTproBNP changes over the MT. In addition of being a marker of cardiac health, studies suggest NTproBNP to be related to cognitive performance, yet those studies have not considered the MT.
View Article and Find Full Text PDFBackground: The emergence of new biomarkers for Alzheimer's disease is accompanied by the urgent need to evaluate their diagnostic performance in comparison to existing technologies. Meta-analysis methods make best use of the available evidence by synthesizing all relevant published studies. Meta-analytic models that estimate comparative diagnostic accuracy are key to informing healthcare decision-making around which tests should be used in clinical practice.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of California, San Francisco, San Francisco, CA, USA.
Background: Individuals with dementia frequently exhibit disturbed sleep electroencephalography (EEG) microstructures, including spindles and slow oscillations. We have previously developed a sleep EEG-based brain age index (BAI), which integrates multiple sleep EEG microstructures and has been associated with prevalent dementia in clinical populations. Here, we aim to determine if BAI is associated with incident cognitive impairment (CI) in a community population of older men, and its discrimination capability as a digital biomarker.
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