Increased free prostate specific antigen serum levels in Alzheimer's disease, correlation with Cognitive Decline

Zohara Sternberg, Rebecca Podolsky, Adam Nir, Jihnhee Yu, Raphael Nir, Stanley W. Halvorsen, Kailash Chadha, Joseph Quinn, Jeffrey Kaye, Channa Kolb

Research output: Contribution to journalArticle

Abstract

Background/aims: Prostate specific antigen (PSA) is regulated by steroid hormones, such as testosterone, the serum levels of which are altered in patients with Alzheimer's disease (AD).This pilot study compared serum levels of the free (f) PSA between AD, mild cognitive impairment (MCI), and control subjects, and evaluated the relationship between fPSA serum levels and cognitive assessment tests and neuroimaging data. In addition, in a subgroup of AD patients, we correlated fPSA serum levels with the existing data on serum levels of amyloid-beta (Aβ), and iron-related proteins, including hepcidin and ferritin. Methods: Frozen serum samples from the Oregon Tissue Bank were used to measure serum levels of fPSA using enzyme-linked immunosorbent assay. Results: fPSA serum levels calculated as median ± SD were higher in AD males (663.6 ± 821.0 pg/ml) compared to control males (152.0 ± 207.0 pg/ml), p = 0.003. A similar Pattern emerged when comparing MCI males (310.7 ± 367.0 pg/ml) to control males (P = 0.02). Correlation studies showed a significant association between fPSA and CDR (r = 0.56, P = 0.006) and CDR-SOB (r = 0.54, P = 0.009) in AD males. Conclusion: Additional studies in a larger cohort are required for determining whether fPSA can be used as biomarker of AD disease progression and whether it has the potential to identify male subjects at risk of AD dementia.

Original languageEnglish (US)
Pages (from-to)188-193
Number of pages6
JournalJournal of the neurological sciences
Volume400
DOIs
StatePublished - May 15 2019

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Keywords

  • ACT
  • Iron-related proteins
  • Mild cognitive impairment
  • Serum biomarker

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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