Subtracting the background by reducing cell-free DNA's confounding effects on Mycobacterium tuberculosis quantitation and the sputum microbiome.
Humans
Mycobacterium tuberculosis
/ genetics
Sputum
/ microbiology
Microbiota
/ drug effects
Cell-Free Nucleic Acids
RNA, Ribosomal, 16S
/ genetics
DNA, Bacterial
/ genetics
Tuberculosis
/ microbiology
Female
Male
Adult
Middle Aged
Azides
/ pharmacology
Tuberculosis, Pulmonary
/ microbiology
Propidium
/ analogs & derivatives
Mycobacterium tuberculosis
DNaseI
PEMAX
Propidium monoazide
Sputum microbiome
Xpert MTB/RIF
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
27 Sep 2024
27 Sep 2024
Historique:
received:
14
06
2024
accepted:
18
09
2024
medline:
28
9
2024
pubmed:
28
9
2024
entrez:
27
9
2024
Statut:
epublish
Résumé
DNA characterisation in people with tuberculosis (TB) is critical for diagnostic and microbiome evaluations. However, extracellular DNA, more frequent in people on chemotherapy, confounds results. We evaluated whether nucleic acid dyes [propidium monoazide (PMA), PEMAX] and DNaseI could reduce this. PCR [16S Mycobacterium tuberculosis complex (Mtb) qPCR, Xpert MTB/RIF] was done on dilution series of untreated and treated (PMA, PEMAX, DNaseI) Mtb. Separately, 16S rRNA gene qPCR and sequencing were done on untreated and treated sputa before (Cohort A: 11 TB-negatives, 9 TB-positives; Cohort B: 19 TB-positives, PEMAX only) and 24-weeks after chemotherapy (Cohort B). PMA and PEMAX reduced PCR-detected Mtb DNA for dilution series and Cohort A sputum versus untreated controls, suggesting non-intact Mtb is present before treatment-start. PEMAX enabled sequencing-based Mycobacterium-detection in 7/12 (58%) TB-positive sputa where no such reads otherwise occurred. In Cohort A, PMA- and PEMAX-treated versus untreated sputa had decreased α- and increased β-diversities. In Cohort B, β-diversity differences between timepoints were only detected with PEMAX. DNaseI had negligible effects. PMA and PEMAX (but not DNaseI) reduced extracellular DNA in PCR and improved pathogen detection by sequencing. PEMAX additionally detected chemotherapy-associated taxonomic changes that would otherwise be missed. Dyes enhance microbiome evaluations especially during chemotherapy.
Identifiants
pubmed: 39333362
doi: 10.1038/s41598-024-73497-3
pii: 10.1038/s41598-024-73497-3
doi:
Substances chimiques
Cell-Free Nucleic Acids
0
RNA, Ribosomal, 16S
0
DNA, Bacterial
0
propidium monoazide
0
Azides
0
Propidium
36015-30-2
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
22350Subventions
Organisme : NIH HHS
ID : K43TW012302
Pays : United States
Organisme : NIH HHS
ID : R01AI136894
Pays : United States
Organisme : National Research Foundation
ID : 98948
Organisme : European and Developing Countries Clinical Trials Partnership
ID : SF1041
Informations de copyright
© 2024. The Author(s).
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