Haematopoietic cell transplantation outcomes are linked to intestinal mycobiota dynamics and an expansion of Candida parapsilosis complex species

Autor: Joao B. Xavier, Roberta J. Wright, Jonathan U. Peled, Bing Zhai, Miguel Perales, Kate A. Markey, Ying Taur, Tobias M. Hohl, Doris M. Ponce, Thierry Rolling, Luigi A Amoretti, Marcel R.M. van den Brink, Mergim Gjonbalaj, Nicholas L. Tosini, Emily Fontana, Keiko Yasuma-Mitobe
Rok vydání: 2021
Předmět:
Zdroj: Nature Microbiology. 6:1505-1515
ISSN: 2058-5276
Popis: Allogeneic haematopoietic cell transplantation (allo-HCT) induces profound shifts in the intestinal bacterial microbiota. The dynamics of intestinal fungi and their impact on clinical outcomes during allo-HCT are not fully understood. Here we combined parallel high-throughput fungal ITS1 amplicon sequencing, bacterial 16S amplicon sequencing and fungal cultures of 1,279 faecal samples from a cohort of 156 patients undergoing allo-HCT to reveal potential trans-kingdom dynamics and their association with patient outcomes. We saw that the overall density and the biodiversity of intestinal fungi were stable during allo-HCT but the species composition changed drastically from day to day. We identified a subset of patients with fungal dysbiosis defined by culture positivity (n = 53) and stable expansion of Candida parapsilosis complex species (n = 19). They presented with distinct trans-kingdom microbiota profiles, characterized by a decreased intestinal bacterial biomass. These patients had worse overall survival and higher transplant-related mortality independent of candidaemia. This expands our understanding of the clinical significance of the mycobiota and suggests that targeting fungal dysbiosis may help to improve long-term patient survival.
Databáze: OpenAIRE
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