Experimental infection with the hookworm, Necator americanus, is associated with stable gut microbial diversity in human volunteers with relapsing multiple sclerosis

BMC Biology

David I. Pritchard¹  Gary Telford¹  Cinzia Cantacessi²  Riccardo Scotti²  Alba Cortés³  Marina Papaiakovou⁴  Timothy P. Jenkins⁵  Cris S. Constantinescu⁶  Radu Tanasescu⁶ 

[1] Department of Pharmacy, University of Nottingham, Nottingham, UK;Department of Veterinary Medicine, University of Cambridge, Cambridge, UK;Department of Veterinary Medicine, University of Cambridge, Cambridge, UK;Departament de Farmàcia i Tecnologia Farmacèutica i Parasitologia, Facultat de Farmàcia, Universitat de València, València, Spain;Department of Veterinary Medicine, University of Cambridge, Cambridge, UK;National History Museum, London, UK;Department of Veterinary Medicine, University of Cambridge, Cambridge, UK;Present address: Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark;Division of Clinical Neurology, School of Clinical Sciences, University of Nottingham, Queen’s Medical Centre, Nottingham, UK;

关键词: Relapsing multiple sclerosis;    Hookworm;    Helminth therapy;    Bacterial 16S rRNA sequencing;    Bacterial richness;    Bacterial diversity;    Relapse;    Parabacteroides;   

DOI  :  10.1186/s12915-021-01003-6

来源: Springer

【 摘 要 】

BackgroundHelminth-associated changes in gut microbiota composition have been hypothesised to contribute to the immune-suppressive properties of parasitic worms. Multiple sclerosis is an immune-mediated autoimmune disease of the central nervous system whose pathophysiology has been linked to imbalances in gut microbial communities.ResultsIn the present study, we investigated, for the first time, qualitative and quantitative changes in the faecal bacterial composition of human volunteers with remitting multiple sclerosis (RMS) prior to and following experimental infection with the human hookworm, Necator americanus (N+), and following anthelmintic treatment, and compared the findings with data obtained from a cohort of RMS patients subjected to placebo treatment (PBO). Bacterial 16S rRNA high-throughput sequencing data revealed significantly decreased alpha diversity in the faecal microbiota of PBO compared to N+ subjects over the course of the trial; additionally, we observed significant differences in the abundances of several bacterial taxa with putative immune-modulatory functions between study cohorts. Parabacteroides were significantly expanded in the faecal microbiota of N+ individuals for which no clinical and/or radiological relapses were recorded at the end of the trial.ConclusionsOverall, our data lend support to the hypothesis of a contributory role of parasite-associated alterations in gut microbial composition to the immune-modulatory properties of hookworm parasites.

【 授权许可】

CC BY