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Your search keyword '"Letendre, Scott L."' showing total 13 results
Start Over Author "Letendre, Scott L." Journal jaids: journal of acquired immune deficiency syndromes
13 results on '"Letendre, Scott L."'

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11. Plasma and Cerebrospinal Fluid Biomarkers Predict Cerebral Injury in HIV-Infected Individuals on Stable Combination Antiretroviral Therapy.

Author

Anderson, Albert M., Harezlak, Jaroslaw, Ajay Bharti, Deming Mi, Taylor, Michael J., Daar, Eric S., Schifitto, Giovanni, Jianhui Zhong, Alger, Jeffry R., Brown, Mark S., Singer, Elyse J., Campbell, Thomas B., McMahon, Deborah D., Buchthal, Steven, Cohen, Ronald, Yiannoutsos, Constantin, Letendre, Scott L., and Navia, Bradford A. more...

Published
2015
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13. Low Cerebrospinal Fluid Concentrations of the Nucleotide HIV Reverse Transcriptase Inhibitor, Tenofovir.

Author

Best, Brookie M., Letendre, Scott L., Koopmans, Peter, Rossi, Steven S., Clifford, David B., Collier, Ann C., Gelman, Benjamin B., Marra, Christina M., McArthur, Justin C., McCutchan, J. Allen, Morgello, Susan, Simpson, David M., Capparelli, Edmund V., Ellis, Ronald J., and Grant, Igor more...

Abstract

Tenofovir is a nucleotide HIV reverse transcriptase inhibitor whose chemical properties suggest that it may not penetrate into the central nervous system in therapeutic concentrations. The study's objective was to determine tenofovir's penetration into cerebrospinal fluid (CSF).CNS HIV Antiretroviral Therapy Effects Research is a multicenter observational study to determine the effects of antiretroviral therapy on HIV-associated neurological disease. Single random plasma and CSF samples were drawn within an hour of each other from subjects taking tenofovir between October 2003 and March 2007. All samples were assayed by mass spectrometry with a detection limit of 0.9 ng/mL.One hundred eighty-three participants (age 44 ± 8 years; 83 ± 32 kg; 33 females; CSF protein 44 ± 16 mg/dL) had plasma and CSF samples drawn 12.2 ± 6.9 and 11 ± 7.8 hours post dose, respectively. Median plasma and CSF tenofovir concentrations were 96 ng/mL [interquartile range (IQR) 47-153 ng/mL] and 5.5 ng/mL (IQR 2.7-11.3 ng/mL), respectively. Thirty-four of 231 plasma (14.7%) and 9 of 77 CSF samples (11.7%) were below detection. CSF to plasma concentration ratio from paired samples was 0.057 (IQR 0.03-0.1; n = 38). Median CSF to wild-type 50% inhibitory concentration ratio was 0.48 (IQR 0.24-0.98). Seventy-seven percent of CSF concentrations were below the tenofovir wild-type 50% inhibitory concentration. More subjects had detectable CSF HIV with lower (7 ng/mL) versus higher (>7ng/mL) CSF tenofovir concentrations (29% versus 9%; P = 0.05).Tenofovir concentrations in the CSF are only 5% of plasma concentrations, suggesting limited transfer into the CSF, and possibly active transport out of the CSF. CSF tenofovir concentrations may not effectively inhibit viral replication in the CSF. [ABSTRACT FROM AUTHOR] more...

Published
2012
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