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Ancient DNA analysis – an established technique in charting the evolution of tuberculosis and leprosy

Donoghue, HD; (2015) Ancient DNA analysis – an established technique in charting the evolution of tuberculosis and leprosy. Tuberculosis , 95 , Article Supplement 1. 10.1016/j.tube.2015.02.020. Green open access

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Abstract

Many tuberculosis and leprosy infections are latent or paucibacillary, suggesting a long time-scale for host and pathogen co-existence. Palaeopathology enables recognition of archaeological cases and PCR detects pathogen ancient DNA (aDNA). Mycobacterium tuberculosis and Mycobacterium leprae cell wall lipids are more stable than aDNA and restrict permeability, thereby possibly aiding long-term persistence of pathogen aDNA. Amplification of aDNA, using specific PCR primers designed for short fragments and linked to fluorescent probes, gives good results, especially when designed to target multi-copy loci. Such studies have confirmed tuberculosis and leprosy, including co-infections. Many tuberculosis cases have non-specific or no visible skeletal pathology, consistent with the natural history of this disease. M. tuberculosis and M. leprae are obligate parasites, closely associated with their human host following recent clonal distribution. Therefore genotyping based on single nucleotide polymorphisms (SNPs) can indicate their origins, spread and phylogeny. Knowledge of extant genetic lineages at particular times in past human populations can be obtained from well-preserved specimens where molecular typing is possible, using deletion analysis, microsatellite analysis and whole genome sequencing. Such studies have identified non-bovine tuberculosis from a Pleistocene bison from 17,500 years BP, human tuberculosis from 9000 years ago and leprosy from over 2000 years ago.

Type: Article
Title: Ancient DNA analysis – an established technique in charting the evolution of tuberculosis and leprosy
Location: UK
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.tube.2015.02.020
Publisher version: http://dx.doi.org/10.1016/j.tube.2015.02.020
Language: English
Additional information: © Elsevier 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. Access may be initially be restricted by the publisher.
Keywords: Ancient DNA, Evolution, Mycobacterium leprae, Mycobacterium tuberculosis, molecular typing
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Infection and Immunity
URI: https://discovery.ucl.ac.uk/id/eprint/1461902
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