The DOI matches its Crossref record.
Cytochrome oxidase deficiency in Alzheimer’s disease
Abstract
We assayed cytochrome oxidase and other electron transport chain activities in platelet mitochondria isolated from patients with Alzheimer's disease (AD). Five of 6 patients had striking reductions of platelet cytochrome oxidase activity (patient mean, 83.72 +/- 82.99 nmol/min/mg; control mean, 167.14 +/- 36.21 nmol/min/mg; n = 8). Other electron transport chain catalytic activities were not significantly different than control values. AD may be a systemic illness, a primary defect in cytochrome oxidase may be pathogenically important in its production, and the mitochondrial genes encoding cytochrome oxidase subunits may be important in producing the defect.
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In the citing paper
“however, in mitochondria isolated from AD platelets, the activity of complex IV, or cytochrome c oxidase, is significantly decreased [109,110,111]”
From Mitochondrial Oxidative and Nitrosative Stress and Alzheimer Disease (2020) · cites this paper as [109]
In the citing paper
“In addition to the brain, reduced COX activity is also seen in AD subject platelets and fibroblasts [127, 128].”
From Brain aging, Alzheimer's disease, and mitochondria (2011) · cites this paper as [127]
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Sabri, M. I. (1998) · Springer eBooks · doi:10.1007/978-3-662-12509-0_14 · Cited by 5
Hedin, H. L. M., Eriksson, S., & Fowler, C. J. (2000) · Biochemical and Biophysical Research Communications · doi:10.1006/bbrc.2000.3154 · Cited by 4
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Jafek, B. W., Eller, P. M., Johnson, E. W., et al. (1992) · American Journal of Rhinology · doi:10.2500/105065892781976646 · Cited by 4
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de Halac, I. N., Bacman, S. R., & de Kremer, R. D. (2000) · The Histochemical Journal · doi:10.1023/a:1004078705513 · Cited by 3
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BackgroundGötz, M. E., Künig, G., Riederer, P. F., & Youdim, M. B. H. (1996) · Elsevier eBooks · doi:10.1016/b978-044482529-2/50039-1 · Cited by 1
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Maurer, I., Zierz, S., & Möller, H. ‐. (1996) · Springer eBooks · doi:10.1007/978-3-7091-6889-9_17 · Cited by 1
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Elson, J. L., & Samuels, D. C. (2011) · Springer eBooks · doi:10.1007/978-0-85729-701-3_4
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Racchi, M., & Govoni, S. M. (1999) · Springer eBooks · doi:10.1007/978-88-470-2149-5_2
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Bowling, A. C., & Beal, M. F. (1981) · Springer eBooks · doi:10.1007/978-3-662-01135-5_21
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Janetzky, B., Schmid, C., Riederer, P. F., et al. (1995) · Advances in behavioral biology · doi:10.1007/978-1-4757-9145-7_99
Shiwany, N. A., Xie, J., & Guo, Q. (2009) · PubMed Central · Cited by 6
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Stroh, M. A. (2016) · KU ScholarWorks (The University of Kansas)
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Khan, S., Dar, T. A., & Singh, L. R. (2017) · Springer eBooks · doi:10.1007/978-981-10-3707-8_8
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Wallace, D. C., Lott, M. T., Shoffner, J. M., & Brown, M. D. (1992)
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Quintana, D. D. (2020) · The Research Repository @ WVU (West Virginia University) · doi:10.33915/etd.7941
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Parakh, A., Begde, D. N., Dhingra, N., & Sinha, D. (2021) · Advances in Aging Research · doi:10.4236/aar.2021.104005
Singulani, M. P. (2020) · Digital Library of Theses and Dissertations (Universidade de São Paulo) · doi:10.11606/t.42.2020.tde-23122020-202326
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Carlesi, C., Ienco, E. C., Piazza, S., Gerfo, A. L., Alessi, R., Pasquali, L., & Siciliano, G. (2011) · Mediterranean Journal of Nutrition and Metabolism · doi:10.1007/s12349-011-0055-x
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Mishra, S., Tiwari, B. S., & Tiwari, A. K. (2024) · Springer eBooks · doi:10.1007/978-981-97-3169-5_14
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SHARMA, S. K. (2024) · Elsevier eBooks · doi:10.1016/b978-0-443-21752-4.00043-2
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Auboyer, L. (2018) · theses.fr (ABES) · doi:10.70675/07243ef7zb974z4ad8z97d9zd046801798b1
Johnson, C. N., Lysaker, C. R., Cao, X., Csikós, V., Boakye, F. B., Kueck, P. J., Franczak, E., Geiger, P. C., Morris, J. K., Thyfault, J. P., et al. (2026) · FASEB BioAdvances · doi:10.1096/fba.2026-00121
Medina, T., Quiñones, S., Liu, Z., Wu, L., Ziani, B., Shedlock, C. J., Ma, X., Ryan, A., Larson, R., Soto, C. M., et al. (2026) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.64898/2026.06.16.732673
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.05
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.references
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.07
Third Section: Design of a dimeric-nanobody specific for Aβ42 oligomers: the Dimeric-DesAb-O
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.06
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.03
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.04
Napolitano, L. (2026) · Firenze University Press eBooks · doi:10.36253/979-12-215-0993-9.02
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Metadata
- Authors
- Parker, W. D., Filley, C. M., & Parks, J. K.
- Affiliations
- University of Colorado Denver (US)
- Venue
- Neurology
- Published
- 1990-08
- Volume
- 40
- Issue
- 8
- Pages
- 1302-1302
- ISSN
- 0028-3878 (ISSN-L)
- 1526-632X
- OpenAlex
- W1988731658
- Cited by
- 598
- References
- 0
- Citations by year
- 2026: 19 · 2025: 10 · 2024: 12 · 2023: 20 · 2022: 9 · 2021: 22 · 2020: 25 · 2019: 19 · 2018: 18 · 2017: 18 · 2016: 28 · 2015: 10 · 2014: 10 · 2013: 21 · 2012: 15
- FWCI
- 7.27
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neurology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (7r01ns025382-06)
- National Institute of Neurological Disorders and Stroke (NS25382)
- National Center for Research Resources (RR-69)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Keywords
- cytochrome oxidase deficiency, Alzheimer's disease, platelet mitochondria, electron transport chain, mitochondrial dysfunction, systemic disease
- MeSH terms
- Aged, Alzheimer Disease, Blood Platelets, Electron Transport Complex IV, Electron Transport, Female, Humans, Kinetics, Male, Mitochondria, Reference Values, Cytochrome-c Oxidase Deficiency
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