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Emmanouil Dermitzakis, Alfonso Buil and colleagues measure transcriptome-wide expression in a sample of twins to measure the relative contribution of genetic and environmental effects on allele-specific expression and find substantial effects of gene × gene and gene × environment interactions.
Alan Lloyd and colleagues identify a MYB gene in beet that acts as a key regulator of the betalain red pigmentation pathway. They further show that this gene resides at the classical Y pigmentation locus and shares homology with MYB genes that encode positive regulators of the anthocyanin pigmentation pathway in other species.
Stéphanie Debette and colleagues report the results of a genome-wide association study of cervical artery dissection, a major cause of ischemic stroke in young adults. They show that common variation in PHACTR1, previously associated with lower risk of migraine and increased risk of myocardial infarction, is associated with reduced risk of cervical artery dissection.
Cas Simons, Ryan Taft and colleagues report the identification of KCNH1 mutations in six individuals with Temple-Baraitser syndrome (TBS). Electrophysiological measurements of cells expressing mutant KCNH1 channels show decreased activation thresholds and slower deactivation in comparison to wild-type channels, suggesting that these mutations lead to gain of function of KCNH1.
Mark Walker and colleagues report the whole-genome sequencing of 132 group A Streptococcus (GAS) isolates of a sequence type that has been associated with scarlet fever. The isolates were obtained from 58 clinical cases of scarlet fever and 83 cases without scarlet fever during the course of a recent epidemic in Hong Kong.
Sarah Dunstan, Chiea Chuen Khor and colleagues identify common variants in the HLA-DRB1 region associated with resistance to enteric fever. Individuals carrying the protective variants exhibit roughly five-fold higher resistance against developing this life-threatening infectious disease.
Holger Lerche, Camila Esguerra and colleagues report the identification of inactivating mutations in STX1B in individuals with various seizure-related disorders, including febrile seizures and epilepsy. Functional studies indicate that STX1B acts in the presynaptic release machinery.
Zachary Lippman and colleagues report the recovery in tomato of novel, chemically induced alleles in the SFT (florigen) gene and a newly identified suppressor of the SELF PRUNING gene. These alleles, in combination with previous florigen pathway mutations, allow for the quantitative fine-tuning of fruit yield, which may be applicable to other crop species.
Gregor Andelfinger and colleagues identify mutations in SGOL1 that cause a novel cohesinopathy characterized by chronic atrial and intestinal dysrhythmia, termed CAID syndrome. SGOL1 encodes a component of the cohesin complex, suggesting that cardiac and gut rhythm are regulated by this complex.
Kristijan Ramadan and colleagues report the identification of three individuals from two families with biallelic inactivating mutations in SPRTN causing early onset hepatocellular carcinoma and defects in the DNA replication stress response. Functional studies confirmed critical roles for SPRTN in G2/M checkpoint response and DNA replication.
James Cerhan and colleagues report genome-wide association and meta-analysis studies to identify genetic susceptibility loci for diffuse large B cell lymphoma. They identify four loci that influence genetic susceptibility to this B cell malignancy.
Ping Chi and colleagues identify recurrent inactivating mutations in the PRC2 core components EED and SUZ12 in malignant peripheral nerve sheath tumors. They further show that PRC2 loss is associated with loss of H3K27 trimethylation and aberrant expression of PRC2 target genes and downstream pathways.
Rosalind Eeles, Christopher Haiman and colleagues report genome-wide association and meta-analyses of prostate cancer in populations of European, African, Japanese and Latino ancestry. They identify 23 new susceptibility loci, including one associated with early-onset prostate cancer.
Scott Canna and colleagues report the identification of a de novo mutation in a conserved region of NLRC4 by whole-exome sequencing of an individual presenting with macrophage activation syndrome. Functional studies confirm that the mutation leads to constitutive inflammasome activation.
Graham Heap, Tariq Ahmad and colleagues show that common variants in the HLA-DQA1–HLA-DRB1 region confer susceptibility to thiopurine-induced pancreatitis in individuals undergoing treatment for inflammatory bowel diseases. These findings could help identify patients at risk of developing this serious adverse reaction to thiopurine therapy.
Richard Lifton, Barbara Kazmierczak and colleagues report the identification of a new enterocolitic and autoinflammatory syndrome, which they find is caused by de novo gain-of-function mutations affecting the inflammasome protein NLRC4. Cells with mutant NLRC4 produce elevated levels of cleaved caspase-1, which leads to cell death by pyroptosis.
Dongxin Lin and colleagues report a genome-wide association study for laryngeal squamous cell carcinoma (LSCC) in Chinese populations. They identify three loci newly associated with LSCC.
Kyuyoung Song and colleagues report the results of a two-stage association study of thiopurine-induced early leukopenia in individuals undergoing treatment for Crohn's disease. They find a missense variant in NUDT15 associated with substantially higher risk of developing this life-threatening complication to thiopurine therapy.
Peizeng Yang, Zhenglin Yang and colleagues report results of a genome-wide association study of Vogt-Koyanagi-Harada syndrome. They confirm strong association with the HLA region and identify two new susceptibility loci, including variants near IL23R.
Christoph Klein and colleagues identify homozygous mutations in the JAGN1 gene in families and individuals with severe congenital neutropenia. They show that JAGN1 is necessary for the differentiation and survival of neutrophil granulocytes.