Abstract | BACKGROUND: The identification of biomarkers identifying onset of human immunodeficiency virus-associated dementia (HIV-D) is critical for diagnosis and the elucidation of pathophysiologic pathways. OBJECTIVE: To examine the association between platelet decline from baseline and HIV-D. DESIGN: Prospective cohort study within the North-East AIDS Dementia cohort. SETTING: Four participating referral centers in the United States. PARTICIPANTS: A total of 396 subjects with advanced human immunodeficiency virus ( HIV) infection recruited between 1998 and 2003 and undergoing serial neurologic assessments. Eligibility criteria required CD4 cell counts less than 200/microL or less than 300/microL with evidence of cognitive impairment. A cohort subset without prevalent HIV- D at baseline and without incident HIV- D at the visit immediately after baseline was analyzed (n = 146). Main Outcome Measure Time to first diagnosis of HIV-D. RESULTS: After a median follow-up of 31.1 months, 40 subjects developed HIV-D. Platelet decline from baseline was associated with the development of HIV-D when examined as a time-dependent variable lagged by 6 to 12 months before outcome (multivariate hazard ratio [HR], 2.39; 95% confidence interval [CI], 1.14-5.02; P = .02). This association was stronger during the first 2 years of follow-up (multivariate HR, 6.76; 95% CI, 2.36-19.41; P < .001) than during later years (multivariate HR, 0.94; 95% CI, 0.33-2.67; P = .90). CONCLUSIONS: These results suggest that individuals with declining platelet counts are at greater risk for HIV-D and that the dynamics of circulating platelets vary with respect to the temporal progression of HIV-D. This highlights an avenue to be explored in the understanding of HIV-D pathogenesis.
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Authors | Lynn M Wachtman, Richard L Skolasky, Patrick M Tarwater, Deneen Esposito, Giovanni Schifitto, Karen Marder, Michael P McDermott, Bruce A Cohen, Avindra Nath, Ned Sacktor, Leon G Epstein, Joseph L Mankowski, Justin C McArthur |
Journal | Archives of neurology
(Arch Neurol)
Vol. 64
Issue 9
Pg. 1264-72
(Sep 2007)
ISSN: 0003-9942 [Print] United States |
PMID | 17846264
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Chemical References |
- Biomarkers
- Hemoglobins
- RNA, Viral
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Topics |
- AIDS Dementia Complex
(blood, pathology)
- Adult
- Analysis of Variance
- Biomarkers
- Blood Platelets
(pathology, physiology)
- CD4 Lymphocyte Count
- Cognition
(physiology)
- Cohort Studies
- Female
- Follow-Up Studies
- Hemoglobins
(metabolism)
- Humans
- Male
- Neuropsychological Tests
- Proportional Hazards Models
- Prospective Studies
- RNA, Viral
(blood)
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