R D Abbott1,2, J S Nelson2, G W Ross2,3,4,5, J H Uyehara-Lock6, C M Tanner7,8, K H Masaki4,9, L J Launer10, L R White2,5, H Petrovitch2,4,5. 1. Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Otsu, Japan. 2. Pacific Health Research and Education Institute, Honolulu, HI, USA. 3. Department of Medicine, University of Hawaii John A. Burns School of Medicine, Honolulu, HI, USA. 4. Department of Geriatric Medicine and the John A. Hartford Foundation Center of Excellence in Geriatrics, University of Hawaii John A. Burns School of Medicine, Honolulu, HI, USA. 5. Veterans Affairs Pacific Islands Health Care System, Honolulu, HI, USA. 6. Department of Pathology, University of Hawaii John A. Burns School of Medicine, Honolulu, HI, USA. 7. San Francisco Veterans Affairs Medical Center, University of California-San Francisco, San Francisco, CA, USA. 8. Department of Neurology, University of California-San Francisco, San Francisco, CA, USA. 9. Kuakini Medical Center, Honolulu, HI, USA. 10. National Institute on Aging, Bethesda, MD, USA.
Abstract
AIM: Marinesco bodies (MB) are intranuclear inclusions in pigmented neurons of the substantia nigra (SN). While rare in children, frequency increases with normal ageing and is high in Alzheimer's disease, dementia with Lewy bodies and other neurodegenerative disorders. Coinciding with the age-related rise in MB frequency is initiation of cell death among SN neurons. Whether MB have a role in this process is unknown. Our aim is to examine the association of MB with SN neuron density in Parkinson's disease (PD) in the Honolulu-Asia Aging Study. METHODS: Data on MB and neuron density were measured in SN transverse sections in 131 autopsied men aged 73-99 years at the time of death from 1992 to 2007. RESULTS: Marinesco body frequency was low in the presence vs. absence of PD (2.3% vs. 6.6%, P < 0.001). After PD onset, MB frequency declined as duration of PD increased (P = 0.006). Similar patterns were observed for SN neuron density. When MB frequency was low, neuron density was noticeably reduced in the SN ventrolateral quadrant, the region most vulnerable to PD neurodegeneration. Low MB frequency was unique to PD as its high frequency in non-PD cases was unrelated to parkinsonian signs and incidental Lewy bodies. Frequency was high in the presence of Alzheimer's disease and apolipoprotein ε4 alleles. CONCLUSIONS: While findings confirm that MB frequency is low in PD, declines in MB frequency continue with PD duration. The extent to which MB have a distinct relationship with PD warrants clarification. Further studies of MB could be important in understanding PD processes.
AIM: Marinesco bodies (MB) are intranuclear inclusions in pigmented neurons of the substantia nigra (SN). While rare in children, frequency increases with normal ageing and is high in Alzheimer's disease, dementia with Lewy bodies and other neurodegenerative disorders. Coinciding with the age-related rise in MB frequency is initiation of cell death among SN neurons. Whether MB have a role in this process is unknown. Our aim is to examine the association of MB with SN neuron density in Parkinson's disease (PD) in the Honolulu-Asia Aging Study. METHODS: Data on MB and neuron density were measured in SN transverse sections in 131 autopsied men aged 73-99 years at the time of death from 1992 to 2007. RESULTS: Marinesco body frequency was low in the presence vs. absence of PD (2.3% vs. 6.6%, P < 0.001). After PD onset, MB frequency declined as duration of PD increased (P = 0.006). Similar patterns were observed for SN neuron density. When MB frequency was low, neuron density was noticeably reduced in the SN ventrolateral quadrant, the region most vulnerable to PD neurodegeneration. Low MB frequency was unique to PD as its high frequency in non-PD cases was unrelated to parkinsonian signs and incidental Lewy bodies. Frequency was high in the presence of Alzheimer's disease and apolipoprotein ε4 alleles. CONCLUSIONS: While findings confirm that MB frequency is low in PD, declines in MB frequency continue with PD duration. The extent to which MB have a distinct relationship with PD warrants clarification. Further studies of MB could be important in understanding PD processes.
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