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Mobilization of systemic CCL4 following HIV pre-exposure prophylaxis in young men in Africa

Petkov, S (author)
Herrera, C (author)
Else, L (author)
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Mugaba, S (author)
Namubiru, P (author)
Odoch, G (author)
Opoka, D (author)
Pillay, ADAP (author)
Seiphetlo, TB (author)
Serwanga, J (author)
Ssemata, AS (author)
Kaleebu, P (author)
Webb, EL (author)
Khoo, S (author)
Lebina, L (author)
Gray, CM (author)
Martinson, N (author)
Fox, J (author)
Chiodi, F (author)
Karolinska Institutet
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 (creator_code:org_t)
2022-07-27
2022
English.
In: Frontiers in immunology. - : Frontiers Media SA. - 1664-3224. ; 13, s. 965214-
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • HIV-1 pre-exposure prophylaxis (PrEP) relies on inhibition of HIV-1 replication steps. To understand how PrEP modulates the immunological environment, we derived the plasma proteomic profile of men receiving emtricitabine-tenofovir (FTC-TDF) or emtricitabine-tenofovir alafenamide (FTC-TAF) during the CHAPS trial in South Africa and Uganda (NCT03986970). The CHAPS trial randomized 144 participants to one control and 8 PrEP arms, differing by drug type, number of PrEP doses and timing from final PrEP dose to sampling. Blood was collected pre- and post-PrEP. The inflammatory profile of plasma samples was analyzed using Olink (N=92 proteins) and Luminex (N=33) and associated with plasma drug concentrations using mass spectrometry. The proteins whose levels changed most significantly from pre- to post-PrEP were CCL4, CCL3 and TNF-α; CCL4 was the key discriminator between pre- and post-PrEP samples. CCL4 and CCL3 levels were significantly increased in post-PrEP samples compared to control specimens. CCL4 was significantly correlated with FTC drug levels in plasma. Production of inflammatory chemokines CCL4 and CCL3 in response to short-term PrEP indicates the mobilization of ligands which potentially block virus attachment to CCR5 HIV-1 co-receptor. The significant correlation between CCL4 and FTC levels suggests that CCL4 increase is modulated as an inflammatory response to PrEP.

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