Publications by authors named "N J Leach"

Vitamin D deficiency and type 2 diabetes mellitus are risk factors for colorectal cancer, suggesting a role for vitamin D receptor (VDR) and insulin receptor (INSR) gene polymorphisms. We investigated the prevalence of the VDR-BsmI (rs1544410) and NsiI A/G-INSR (rs2059806) polymorphisms and their associations with colorectal adenoma (CRA) in a Romanian population. A case-control study was conducted with 110 participants (67 with CRA and 43 controls) who underwent colonoscopy.

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The 2021 Pacific Northwest heatwave was so extreme as to challenge conventional statistical and climate-model-based approaches to extreme weather attribution. However, state-of-the-art operational weather prediction systems are demonstrably able to simulate the detailed physics of the heatwave. Here, we leverage these systems to show that human influence on the climate made this event at least 8 [2-50] times more likely.

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Article Synopsis
  • Cortical acetylcholine (ACh) is important for cognitive functions like sound localization, as demonstrated in ferrets trained to adapt to altered spatial cues.
  • Research revealed that reducing cholinergic inputs in ferrets did not significantly alter the overall response properties of primary auditory cortex (A1) neurons, despite a decrease in burst-type units and an increase in synchronous activity.
  • ACh is essential for behavioral adaptation in sound localization tasks, but the spectral and spatial response properties of A1 neurons remain stable even when ACh levels are decreased.
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Prenatal molecular genetic testing for familial variants that cause inherited disorders has been performed for decades and is accepted as standard of care. However, the spectrum of genes considered for prenatal testing is expanding because of genetic testing for hereditary cancer risk (HCR) and inclusion of conditions with associated cancer risk in carrier screening panels. A few of these disorders, such as ataxia telangiectasia and Bloom syndrome, include increased cancer risk as part of the phenotype, already meet professional guidelines for prenatal testing, and may be associated with increased cancer risk in heterozygous carriers.

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Article Synopsis
  • - A patient with Kallmann syndrome (KS) and intellectual disability (ID) was found to have a significant deletion in a specific region of chromosome 12, suggesting that this deletion may be responsible for their conditions rather than the patient's translocation.
  • - The research team screened 48 KS patients for mutations at the translocation breakpoints but found none, further supporting the idea that the 12p11.21-12p11.23 deletion is key to the patient's symptoms.
  • - Through an analysis of various candidate genes and their expression in relevant tissues, several potential genes linked to KS and ID were identified, including TSPAN11 for KS and others like TM7SF3 and STK38L for neurodevelopment
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