Publications by authors named "P H Roseboom"

Article Synopsis
  • DNA methylation changes with age allow machine learning models, called epigenetic clocks, to estimate an individual's biological age and its difference from true age, known as epigenetic age acceleration (EAA), which correlates with health outcomes.
  • Researchers created two accurate epigenetic clocks for rhesus macaques using blood samples from various ages and backgrounds, achieving high correlations between predicted and true ages.
  • The second clock was specifically used to explore the impact of early life adversity, finding that maltreatment is linked to accelerated epigenetic aging and increased stress hormones in young macaques.
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Diabetes mellitus and its complications are a known public health problem nowadays. Diabetic nephropathy is one of the main complications and the result of multiple mechanisms, including: activation of the renin-angiotensin-aldosterone system, formation of advanced glycation end products and chronic inflammation that led to glomerular and tubulo-interstitial damage producing mesangial expansion and glomerulosclerosis, which finally results in chronic kidney disease. Early detection of diabetic nephropathy is essential for adequate intervention to stop, or at least slow down its progression.

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Objective: Anxiety disorders are among the most common psychiatric disorders in youths and emerge during childhood. This is also a period of rapid white matter (WM) development, which is critical for efficient neuronal communication. Previous work in preadolescent children with anxiety disorders demonstrated anxiety disorder-related reductions in WM microstructural integrity (fractional anisotropy [FA]) in the uncinate fasciculus (UF), the major WM tract facilitating prefrontal cortical-limbic structural connectivity.

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Background: Evidence suggests that early life adversity is associated with maladaptive behaviors and is commonly an antecedent of stress-related psychopathology. This is particularly relevant to rearing in primate species as infant primates depend on prolonged, nurturant rearing by caregivers for normal development. To further understand the consequences of early life rearing adversity, and the relation among alterations in behavior, physiology and brain function, we assessed young monkeys that had experienced maternal separation followed by peer rearing with behavioral, endocrine and multimodal neuroimaging measures.

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Article Synopsis
  • Anxiety disorders are common psychiatric conditions that often start early in life, and researchers used a nonhuman primate model to explore their biological underpinnings.
  • They injected young rhesus macaques with a specific viral vector to enhance activity in the amygdala, a brain region linked to anxiety, with half the group receiving treatment and the other half serving as controls.
  • Tests showed that the treated subjects exhibited increased anxiety behaviors, such as freezing, after drug administration, suggesting that stimulating these neurons can mimic anxiety disorders and potentially help in studying them in humans.
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