The Ames dwarf mutation attenuates Alzheimer's disease phenotype of APP/PS1 mice

Kendra L. Puig, Joshua A. Kulas, Whitney Franklin, Sharlene G. Rakoczy, Giulio Taglialatela, Holly M. Brown-Borg, Colin K. Combs

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

APP/PS1 double transgenic mice expressing human mutant amyloid precursor protein (APP) and presenilin-1 (PS1) demonstrate robust brain amyloid beta (Aβ) peptide containing plaque deposition, increased markers of oxidative stress, behavioral dysfunction, and proinflammatory gliosis. On the other hand, lack of growth hormone, prolactin, and thyroid-stimulating hormone due to a recessive mutation in the Prop 1 gene (Prop1df) in Ames dwarf mice results in a phenotype characterized by potentiated antioxidant mechanisms, improved learning and memory, and significantly increased longevity in homozygous mice. Based on this, we hypothesized that a similar hormone deficiency might attenuate disease changes in the brains of APP/PS1 mice. To test this idea, APP/PS1 mice were crossed to the Ames dwarf mouse line. APP/PS1, wild-type, df/+, df/df, df/+/APP/PS1, and df/df/APP/PS1 mice were compared at 6 months of age through behavioral testing and assessing amyloid burden, reactive gliosis, and brain cytokine levels. df/df mice demonstrated lower brain growth hormone and insulin-like growth factor 1 concentrations. This correlated with decreased astrogliosis and microgliosis in the df/df/APP/PS1 mice and, surprisingly, reduced Aβ plaque deposition and Aβ 1-40 and Aβ 1-42 concentrations. The df/df/APP/PS1 mice also demonstrated significantly elevated brain levels of multiple cytokines in spite of the attenuated gliosis. These data indicate that the df/df/APP/PS1 line is a unique resource in which to study aging and resistance to disease and suggest that the affected pituitary hormones may have a role in regulating disease progression.

Original languageEnglish (US)
Pages (from-to)22-40
Number of pages19
JournalNeurobiology of Aging
Volume40
DOIs
StatePublished - Apr 1 2016

Fingerprint

Amyloid beta-Protein Precursor
Alzheimer Disease
Presenilin-1
Phenotype
Mutation
Gliosis
Brain
Amyloid
Growth Hormone
Cytokines
mouse presenilin 1
Disease Resistance
Pituitary Hormones
Amyloid beta-Peptides
Somatomedins
Thyrotropin
Mutant Proteins
Prolactin
Transgenic Mice
Disease Progression

Keywords

  • Aging
  • Alzheimer
  • Amyloid
  • Cytokine
  • Dwarf
  • Growth hormone
  • IGF-1
  • Neuroinflammation

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)
  • Aging
  • Developmental Biology
  • Geriatrics and Gerontology

Cite this

Puig, K. L., Kulas, J. A., Franklin, W., Rakoczy, S. G., Taglialatela, G., Brown-Borg, H. M., & Combs, C. K. (2016). The Ames dwarf mutation attenuates Alzheimer's disease phenotype of APP/PS1 mice. Neurobiology of Aging, 40, 22-40. https://doi.org/10.1016/j.neurobiolaging.2015.12.021

The Ames dwarf mutation attenuates Alzheimer's disease phenotype of APP/PS1 mice. / Puig, Kendra L.; Kulas, Joshua A.; Franklin, Whitney; Rakoczy, Sharlene G.; Taglialatela, Giulio; Brown-Borg, Holly M.; Combs, Colin K.

In: Neurobiology of Aging, Vol. 40, 01.04.2016, p. 22-40.

Research output: Contribution to journalArticle

Puig, Kendra L. ; Kulas, Joshua A. ; Franklin, Whitney ; Rakoczy, Sharlene G. ; Taglialatela, Giulio ; Brown-Borg, Holly M. ; Combs, Colin K. / The Ames dwarf mutation attenuates Alzheimer's disease phenotype of APP/PS1 mice. In: Neurobiology of Aging. 2016 ; Vol. 40. pp. 22-40.
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