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  • Title: Improving host-directed therapy for tuberculous meningitis by linking clinical and multi-omics data.
    Author: van Crevel R, ULTIMATE consortium.
    Journal: Tuberculosis (Edinb); 2021 May; 128():102085. PubMed ID: 34022506.
    Abstract:
    There is a clear need to improve host-directed therapy for tuberculous meningitis (TBM), the most severe and deadly manifestation of tuberculosis. Corticosteroids represent the only host-directed therapy of proven benefit in TBM, yet their effect is modest, the mechanism by which they reduce mortality is unknown, and there is evidence for heterogeneity in their effect. Novel therapeutic approaches are therefore urgently needed. Cellular metabolism is critical for the function of immune cells; through unbiased metabolomics we recently found that high concentrations of cerebrospinal fluid (CSF) tryptophan are associated with increased mortality in Indonesian TBM patients, and that CSF tryptophan concentrations are under strong genetic regulation. Many questions remain. How exactly is tryptophan metabolism altered during TBM? How does it correlate with inflammation, immunopathology, and response to corticosteroids? How is tryptophan metabolism genetically regulated? What is the effect of HIV co-infection on tryptophan metabolism before and during TBM treatment? The ULTIMATE project addresses these questions by integrating data and specimens from large patient studies and clinical trials evaluating the effects of corticosteroids in Vietnam and Indonesia. Through its powerful and unbiased approach, ULTIMATE aims to identify which TBM patients benefit from corticosteroids and if novel therapeutic targets, such as the tryptophan pathway, could be targeted.
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