Chimeric mitochondrial RNA transcripts predict mitochondrial genome deletion mutations in mitochondrial genetic diseases and aging.

Although it is well understood that mitochondrial DNA (mtDNA) deletion mutations cause incurable diseases and contribute to aging, little is known about the transcriptional products that arise from these DNA structural variants. We hypothesized that mitochondrial genomes containing deletion mutations express chimeric mitochondrial RNAs. To test this, we analyzed human and rat RNA sequencing data to identify, quantitate, and characterize chimeric mitochondrial RNAs.

Veterans' Lung Cancer Risk Conceptualizations versus Lung Cancer Screening Shared Decision-Making Conversations with Clinicians: A Qualitative Study.

Background: The Veterans Health Administration (VA) recommends lung cancer screening (LCS), including shared decision making between clinicians and veteran patients. We sought to characterize 1) veteran conceptualization of lung cancer risk and 2) veteran and clinician accounts of shared decision-making discussions about LCS to assess whether they reflect veteran concerns.

Methods: We conducted qualitative interviews at 6 VA sites, with 48 clinicians and 34 veterans offered LCS in the previous 6 mo.

Demographics and health of U.S. senior horses used in competitions.

Background: A proportion of senior horses (≥15 years of age) are still used for competition. Information about this particular group of horses is currently sparse.

Objectives: To provide an overview of the demographics, management and health of competing U.

Calcium propionate is an alkalizing agent in exercising Standardbreds.

The objective of this study was to determine if calcium propionate is an alkalizing agent in exercising Standardbreds and if it alters plasma glucose and serum insulin concentrations. This study used a randomized crossover design to test the hypotheses that calcium propionate alters total CO2 (tCO), Ca, pH, strong ion difference (SID), glucose, and insulin in Standardbreds completing a simulated race test (SRT) on a high-speed equine treadmill. Blood was collected from eight horses (mean age ± SD = 16 ± 2.