Cell Reports (Sep 2023)

Biphasic patterns of age-related differences in dopamine D1 receptors across the adult lifespan

  • Jarkko Johansson,
  • Kristin Nordin,
  • Robin Pedersen,
  • Nina Karalija,
  • Goran Papenberg,
  • Micael Andersson,
  • Saana M. Korkki,
  • Katrine Riklund,
  • Marc Guitart-Masip,
  • Anna Rieckmann,
  • Lars Bäckman,
  • Lars Nyberg,
  • Alireza Salami

Journal volume & issue
Vol. 42, no. 9
p. 113107

Abstract

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Summary: Age-related alterations in D1-like dopamine receptor (D1DR) have distinct implications for human cognition and behavior during development and aging, but the timing of these periods remains undefined. Enabled by a large sample of in vivo assessments (n = 180, age 20 to 80 years of age, 50% female), we discover that age-related D1DR differences pivot at approximately 40 years of age in several brain regions. Focusing on the most age-sensitive dopamine-rich region, we observe opposing pre- and post-forties interrelations among caudate D1DR, cortico-striatal functional connectivity, and memory. Finally, particularly caudate D1DR differences in midlife and beyond, but not in early adulthood, associate with manifestation of white matter lesions. The present results support a model by which excessive dopamine modulation in early adulthood and insufficient modulation in aging are deleterious to brain function and cognition, thus challenging a prevailing view of monotonic D1DR function across the adult lifespan.

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