Publications by authors named "C A Welsh"

Cancer is a complex disease characterized by specific "mission-critical" events that drive the uncontrolled growth and spread of tumor cells and their offspring. These events are essential for the advancement of the disease. One of the main contributors to these events is dysregulation of cell death pathways-such as apoptosis, necroptosis, ferroptosis, autophagy, pyroptosis, cuproptosis, parthanatos and-allows cancer cells to avoid programmed cell death and continue proliferating unabated.

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Objective: To examine whether co-morbid insomnia, post-traumatic stress disorder (PTSD), depression, and chronic pain mediate the relationship between traumatic brain injury (TBI) and positive airway pressure (PAP) treatment adherence.

Setting: One Veterans Health Administration (VHA) sleep medicine site.

Participants: Veterans (n = 8836) who were prescribed a modem-enabled PAP device.

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Our case highlights an atypical presentation of endocarditis with acute ischaemic stroke in a male patient in his 60s. The patient had undergone a congenital bicuspid aortic valve replacement with a bioprosthetic valve and an ascending aortic root graft with a pacemaker. He experienced intermittent fevers, chills and malaise over 15 months leading up to his presentation.

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Substances of unknown or variable composition, complex reaction products, and biological materials (UVCBs) are commonly found in the environment. However, assessing their human toxicological risk is challenging due to their variable composition and many constituents. Metal naphthenate salts are one such category of UVCBs that are the reaction products of naphthenic acids with metals to form complex mixtures.

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Somatic mitochondrial DNA (mtDNA) mutations are prevalent in tumors, yet defining their biological significance remains challenging due to the intricate interplay between selective pressure, heteroplasmy, and cell state. Utilizing bulk whole-genome sequencing data from matched tumor and normal samples from two cohorts of pediatric cancer patients, we uncover differences in the accumulation of synonymous and nonsynonymous mtDNA mutations in pediatric leukemias, indicating distinct selective pressures. By integrating single-cell sequencing (SCS) with mathematical modeling and network-based systems biology approaches, we identify a correlation between the extent of cell-state changes associated with tumor-enriched mtDNA mutations and the selective pressures shaping their distribution among individual leukemic cells.

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