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type=\u0022text\/css\u0022 rel=\u0022stylesheet\u0022 href=\u0022\/\/d282kpwvnogo5m.cloudfront.net\/sites\/default\/files\/cdn\/css\/http\/css_Xg7z6oCTVgud_Q0huYz9x9iiD5H_2YPSJ5z2ZViSWdY.css\u0022 media=\u0022all\u0022 \/\u003E\n\u003Clink rel=\u0027stylesheet\u0027 type=\u0027text\/css\u0027 href=\u0027\/sites\/all\/modules\/contrib\/panels\/plugins\/layouts\/onecol\/onecol.css\u0027 \/\u003E\u003C\/head\u003E\u003Cbody\u003E\u003Cdiv class=\u0022panels-ajax-tab-panel panels-ajax-tab-panel-sageoa-tab-art\u0022\u003E\u003Cdiv class=\u0022panel-display panel-1col clearfix\u0022 \u003E\n  \u003Cdiv class=\u0022panel-panel panel-col\u0022\u003E\n    \u003Cdiv\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-markup\u0022 \u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022highwire-markup\u0022\u003E\u003Cdiv xmlns=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022 id=\u0022content-block-markup\u0022 xmlns:xhtml=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022\u003E\u003Cdiv class=\u0022article fulltext-view \u0022\u003E\u003Cspan class=\u0022highwire-journal-article-marker-start\u0022\u003E\u003C\/span\u003E\u003Cdiv class=\u0022section abstract\u0022 id=\u0022abstract-1\u0022\u003E\u003Ch2\u003ESummary\u003C\/h2\u003E\n            \u003Cp id=\u0022p-1\u0022\u003EWeek 144 secondary end point results from a randomized, double-blind, double-dummy, active-controlled study involving 700 treatment-na\u00efve HIV-1-infected patients have reaffirmed that cobicistat can be substituted for ritonavir in a drug regimen that seeks to boost the pharmacologic effect of atazanavir in combination with emtricitabine-tenofovir disoproxil fumarate.\u003C\/p\u003E\n         \u003C\/div\u003E\u003Cul class=\u0022kwd-group\u0022\u003E\u003Cli class=\u0022kwd\u0022\u003EHIV \u0026amp; AIDS\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EInfectious Disease Clinical Trials\u003C\/li\u003E\u003C\/ul\u003E\u003Cul class=\u0022kwd-group clinical-trial\u0022\u003E\u003Cli class=\u0022kwd\u0022\u003EInfectious Disease\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EHIV \u0026amp; AIDS\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EInfectious Disease Clinical Trials\u003C\/li\u003E\u003C\/ul\u003E\u003Cp id=\u0022p-2\u0022\u003EWeek 144 secondary end point results from a randomized, double-blind, double-dummy, active-controlled study involving 700 treatment-na\u00efve HIV-1-infected patients have reaffirmed that cobicistat (COBI) can be substituted for ritonavir (RTV) in a drug regimen that seeks to boost the pharmacologic effect of atazanavir (ATV) in combination with emtricitabine-tenofovir disoproxil fumarate (FTC-TDF). The noninferiority results were presented by Joel Gallant, MD, MPH, Southwest Care Center, Santa Fe, New Mexico, USA.\u003C\/p\u003E\u003Cp id=\u0022p-3\u0022\u003EThe enzyme inhibitor activity of RTV in combination with its inhibitory effect on the hepatic metabolism of many other drugs have made it a workhorse in highly active antiretroviral therapy (HAART) because it boosts the plasma levels of the other protease inhibitors, which allows reductions in their dose and frequency, while enhancing clinical activity.\u003C\/p\u003E\u003Cp id=\u0022p-4\u0022\u003ECOBI is a pharmacoenhancer that, in contrast to RTV, has no antiviral activity. Similar to RTV, it safely and effectively boosts the drug levels of darunavir, elvitegravir (EVG), and ATV by inhibiting their metabolism [German P et al. \u003Cem\u003EJAIDS\u003C\/em\u003E. 2010; Gallant JE et al. \u003Cem\u003EJ Infect Dis.\u003C\/em\u003E 2013; Wohl DA et al. \u003Cem\u003EJAIDS\u003C\/em\u003E. 2014]. The drug has been approved for use in HIV-1 infection by the European Union and the US Food and Drug Administration (FDA).\u003C\/p\u003E\u003Cp id=\u0022p-5\u0022\u003EThe study randomized 700 treatment-na\u00efve HIV-1-infected patients (HIV-1 RNA \u2265 5000 copies\/mL) 1:1 to receive ATV + COBI + FTC-TDF (n = 344) or ATV + RTV + FTC-TDF (n = 348). The primary end point of a decrease of HIV-1 RNA to \u0026lt; 50 copies\/mL at 48 weeks was met, and it showed that COBI was noninferior to RTV in combination with ATV and FTC-TDF [Gallant JE et al. \u003Cem\u003EJ Infect Dis.\u003C\/em\u003E 2013]. The presently reported secondary end point was noninferiority at 144 weeks. Study arms were comparable at baseline concerning demographics, the prevalence of asymptomatic HIV infection, median HIV-1 RNA count, CD4 count, and estimated glomerular filtration rate (eGFR).\u003C\/p\u003E\u003Cp id=\u0022p-6\u0022\u003ESimilar to the 48-week results, the 144-week data show comparable HIV-1 RNA suppression and a low prevalence of virologic failure in both the COBI and RTV study treatment arms (\u003Ca id=\u0022xref-fig-1-1\u0022 class=\u0022xref-fig\u0022 href=\u0022#F1\u0022\u003EFigure 1\u003C\/a\u003E).\u003C\/p\u003E\u003Cdiv id=\u0022F1\u0022 class=\u0022fig pos-float  odd\u0022\u003E\u003Cdiv class=\u0022highwire-figure\u0022\u003E\u003Cdiv class=\u0022fig-inline-img-wrapper\u0022\u003E\u003Cdiv class=\u0022fig-inline-img\u0022\u003E\u003Ca href=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/14\/28\/18\/F1.large.jpg?width=800\u0026amp;height=600\u0026amp;carousel=1\u0022 title=\u0022Virologic outcomes of cobicistat and ritonavir up to week 144\u0022 class=\u0022fragment-images colorbox-load\u0022 rel=\u0022gallery-fragment-images-943385837\u0022 data-figure-caption=\u0022Virologic outcomes of cobicistat and ritonavir up to week 144\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003E\u003Cimg class=\u0022fragment-image\u0022 alt=\u0022Figure 1.\u0022 src=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/14\/28\/18\/F1.medium.gif\u0022\/\u003E\u003C\/a\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cul class=\u0022highwire-figure-links inline\u0022\u003E\u003Cli class=\u00220 first\u0022\u003E\u003Ca href=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/14\/28\/18\/F1.large.jpg?download=true\u0022 class=\u0022highwire-figure-link highwire-figure-link-download\u0022 title=\u0022Download Figure 1.\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EDownload figure\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00221\u0022\u003E\u003Ca href=\u0022http:\/\/d282kpwvnogo5m.cloudfront.net\/content\/spmdc\/14\/28\/18\/F1.large.jpg\u0022 class=\u0022highwire-figure-link highwire-figure-link-newtab\u0022 target=\u0022_blank\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EOpen in new tab\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00222 last\u0022\u003E\u003Ca href=\u0022\/highwire\/powerpoint\/11836\u0022 class=\u0022highwire-figure-link highwire-figure-link-ppt\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EDownload powerpoint\u003C\/a\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003C\/div\u003E\u003Cdiv class=\u0022fig-caption attrib\u0022\u003E\u003Cspan class=\u0022fig-label\u0022\u003EFigure 1.\u003C\/span\u003E \n            \u003Cp id=\u0022p-7\u0022 class=\u0022first-child\u0022\u003EVirologic outcomes of cobicistat and ritonavir up to week 144\u003C\/p\u003E\n         \u003Cq class=\u0022attrib\u0022 id=\u0022attrib-1\u0022\u003EATV, atazanavir; COBI, cobicistat; RTV, ritonavir.\u003C\/q\u003E\u003Cq class=\u0022attrib\u0022 id=\u0022attrib-2\u0022\u003EReproduced with permission from J Gallant, MD, MPH.\u003C\/q\u003E\u003Cdiv class=\u0022sb-div caption-clear\u0022\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cp id=\u0022p-8\u0022\u003ECOBI and RTV were comparable in terms of the development of resistance by week 144 and the common adverse events associated with resistance. The drugs were also similar in the frequency of those adverse events that led to discontinued use of COBI or RTV (\u003Ca id=\u0022xref-table-wrap-1-1\u0022 class=\u0022xref-table\u0022 href=\u0022#T1\u0022\u003ETable 1\u003C\/a\u003E).\u003C\/p\u003E\u003Cdiv id=\u0022T1\u0022 class=\u0022table pos-float\u0022\u003E\u003Cdiv class=\u0022table-inline\u0022\u003E\u003Cdiv class=\u0022callout\u0022\u003E\u003Cspan\u003EView this table:\u003C\/span\u003E\u003Cul class=\u0022callout-links\u0022\u003E\u003Cli class=\u00220 first\u0022\u003E\u003Ca href=\u0022\/\u0022 class=\u0022table-expand-inline\u0022 data-table-url=\u0022\/highwire\/markup\/11837\/expansion?postprocessors=highwire_figures%2Chighwire_math%2Chighwire_inline_linked_media%2Chighwire_embed\u0026amp;table-expand-inline=1\u0022 html=\u00221\u0022 fragment=\u0022#\u0022 external=\u00221\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView inline\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00221\u0022\u003E\u003Ca href=\u0022\/highwire\/markup\/11837\/expansion?width=1000\u0026amp;height=500\u0026amp;iframe=true\u0026amp;postprocessors=highwire_figures%2Chighwire_math%2Chighwire_inline_linked_media\u0022 class=\u0022colorbox colorbox-load table-expand-popup\u0022 rel=\u0022gallery-fragment-tables\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView popup\u003C\/a\u003E\u003C\/li\u003E\u003Cli class=\u00222 last\u0022\u003E\u003Ca href=\u0022\/highwire\/powerpoint\/11837\u0022 class=\u0022highwire-figure-link highwire-figure-link-ppt\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EDownload powerpoint\u003C\/a\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cdiv class=\u0022table-caption\u0022\u003E\u003Cspan class=\u0022table-label\u0022\u003ETable 1.\u003C\/span\u003E \n            \u003Cp id=\u0022p-9\u0022 class=\u0022first-child\u0022\u003EReasons for Drug Discontinuation\u003C\/p\u003E\n         \u003Cdiv class=\u0022sb-div caption-clear\u0022\u003E\u003C\/div\u003E\u003C\/div\u003E\u003C\/div\u003E\u003Cp id=\u0022p-12\u0022\u003EThe similarity extended to grade 3 and 4 laboratory abnormalities, predominantly hyperbilirubinemia (70% and 62% of abnormalities for COBI and RTV, respectively). Baseline to week 144 changes were similar for serum creatinine (0.13 for COBI, 0.07 for RTV) and eGFR (\u221215 for COBI, \u22128 for RTV). When creatinine and eGFR were tracked from weeks 4 to 144, eliminating the effects of COBI and RTV on tubular creatinine excretion, renal function was stable and comparable in both arms (serum creatinine: 0.04 for COBI, 0.02 for RTV; eGFR: \u22123.5 for COBI, \u22123.3 for RTV). There was no difference between the drugs concerning the ratio of total cholesterol to high-density lipoprotein.\u003C\/p\u003E\u003Cp id=\u0022p-13\u0022\u003ENoninferiority of COBI versus RTV came with infrequent nucleotide and nucleoside reverse transcriptase inhibitor resistance and no protease inhibitor resistance. These data, and the recent approval of cobicistat by the FDA, will lead to coformulations with ATV and DRV.\u003C\/p\u003E\u003Cul class=\u0022copyright-statement\u0022\u003E\u003Cli class=\u0022fn\u0022 id=\u0022copyright-statement-1\u0022\u003E\u00a9 2014 MD Conference Express\u00ae\u003C\/li\u003E\u003C\/ul\u003E\u003Cspan class=\u0022highwire-journal-article-marker-end\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Cspan id=\u0022related-urls\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Ca href=\u0022http:\/\/mdc.sagepub.com\/content\/14\/28\/18.abstract\u0022 class=\u0022hw-link hw-link-article-abstract\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView Summary\u003C\/a\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E\n\u003C\/div\u003E\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_figures.js?nzm0qp\u0022\u003E\u003C\/script\u003E\n\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_openurl.js?nzm0qp\u0022\u003E\u003C\/script\u003E\n\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_tables.js?nzm0qp\u0022\u003E\u003C\/script\u003E\n\u003C\/body\u003E\u003C\/html\u003E"}