Unravelling the Proteomics of HLA-B*57:01 + Antigen Presenting Cells during Abacavir Medication

Haukamp, Funmilola Josephine; Gall, Eline; Hò, Gia-Gia Toni GND; Hiemisch, Wiebke; Stieglitz, Florian ORCID; Kuhn, Joachim; Blasczyk, Rainer ORCID; Pich, Andreas GND; Bade-Döding, Christina GND

Type B adverse drug reactions (ADRs) are unpredictable based on the drug’s pharmacology and represent a key challenge in pharmacovigilance. For human leukocyte antigen (HLA)-mediated type B ADRs, it is assumed that the protein/small-molecule interaction alters the biophysical and mechanistic properties of the antigen presenting cells. Sophisticated methods enabled the molecular appreciation of HLA-mediated ADRs; in several instances, the drug molecule occupies part of the HLA peptide binding groove and modifies the recruited peptide repertoire thereby causing a strong T-cell-mediated immune response that is resolved upon withdrawal of medication. The severe ADR in HLA-B*57:01+ patients treated with the antiretroviral drug abacavir (ABC) in anti-HIV therapy is an example of HLA-drug-T cell cooperation. However, the long-term damages of the HLA-B*57:01- expressing immune cells following ABC treatment remain unexplained. Utilizing full proteome sequencing following ABC treatment of HLA-B*57:01+ cells, we demonstrate stringent proteomic alteration of the HLA/drug presenting cells. The proteomic content indisputably reflects the cellular condition; this knowledge directs towards individual pharmacovigilance for the development of personalized and safe medication.

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Haukamp, Funmilola / Gall, Eline / Hò, Gia-Gia / et al: Unravelling the Proteomics of HLA-B*57:01 + Antigen Presenting Cells during Abacavir Medication. 2022.

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