4.5 Article

Late-life hemoglobin and the incidence of Parkinson's disease

Journal

NEUROBIOLOGY OF AGING
Volume 33, Issue 5, Pages 914-920

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2010.06.023

Keywords

Hemoglobin; Iron; Parkinson's disease; Epidemiology

Funding

  1. National Institute on Aging [N01-AG-4-2149, 1-R01-AG17155-01A1]
  2. National Heart, Lung, and Blood Institute [N01-HC-05102]
  3. National Institute of Neurological Disorders and Stroke [1-R01-NS41265-01]
  4. United States Department of the Army [DAMD17-98-1-8621]
  5. Office of Research and Development, Medical Research Service, Department of Veterans Affairs

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Brain iron promotes neurodegeneration in Parkinson's disease (PD). While hemoglobin (Hb) is the most abundant source of peripheral iron in humans, its relationship with PD is uncertain. This report examines the association between Hb in late life and PD incidence. From 1991 to 1993, Hb was measured in 3507 men in the Honolulu-Asia Aging Study. Men were aged 71-93 years and without PD. Participants were followed until 2001 for incident PD. Hb levels declined markedly with age. For men aged 71-75 years, 14.8% had levels < 14 g/dL versus 53.6% in those aged 86 and older (p < 0.001). During follow-up, 47 men developed PD (19.8/10,000 person-years). After age adjustment, PD incidence rose significantly from 10.3 to 34.9/10,000 person-years as Hb increased from < 14 to >= 16 g/dL (p = 0.024; relative hazard 3.2; 95% confidence interval, 1.2-8.9). Associations persisted after accounting for early mortality and adjustments for concomitant risk factors. While Hb declines with advancing age, evidence suggests that Hb that remains high in elderly men is associated with an increased risk of PD. (C) 2012 Elsevier Inc. All rights reserved.

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Summary: This study demonstrates a relationship between cerebrospinal fluid biomarkers and the ability to recall proper names in the preclinical phase of Alzheimer's disease.

NEUROBIOLOGY OF AGING (2024)

Article Geriatrics & Gerontology

Auditory robustness and resilience in the aging auditory system of the desert locust

Thomas T. Austin, Christian L. Thomas, Ben Warren

Summary: This study investigated the effects of age on the robustness and resilience of auditory system using the desert locust. The researchers found that gene expression changes were mainly influenced by age rather than noise exposure. Both young and aged locusts were able to recover their auditory nerve function within 48 hours of noise exposure, but the recovery of transduction current magnitude was impaired in aged locusts. Key genes responsible for robustness to noise exposure in young locusts and potential candidates for compensatory mechanisms in auditory neurons of aged locusts were identified.

NEUROBIOLOGY OF AGING (2024)