First application of loop-mediated isothermal amplification (LAMP) assays for rapid identification of mating type in the heterothallic fungus Aspergillus fumigatus.

Abstract:

BACKGROUND:Loop-mediated isothermal amplification (LAMP) assays, which operate at a single temperature and require no postreaction processing, have been described for rapid species-specific detection of numerous fungi. The technology has much less commonly been applied to identification of other key genetic traits such as fungicide resistance, and has not yet been applied to mating-type determination in any fungus. OBJECTIVES:To develop first LAMP assays for mating-type identification in a fungus, in this instance with the saprophytic mould and human opportunistic pathogen Aspergillus fumigatus, a heterothallic ascomycete requiring isolates of opposite mating type (MAT1-1, MAT1-2) for sexual reproduction. METHODS:New LAMP primer sets, targeted to MAT gene sequences, were screened against 34 A fumigatus isolates (of known mating type) from diverse clinical, environmental and geographic sources to establish whether they could distinguish MAT1-1 or MAT1-2 genotypes. RESULTS AND CONCLUSIONS:The new assays, operating at a single temperature of 65°C, correctly identified the mating type of A fumigatus isolates in <20 minutes, and thus have numerous research and practical applications. Similar MAT LAMP assays could now be developed for other fungi of agricultural, environmental, industrial and/or medical importance.

journal_name

Mycoses

journal_title

Mycoses

authors

King KM,Hawkins NJ,Atkins S,Dyer PS,West JS,Fraaije BA

doi

10.1111/myc.12959

subject

Has Abstract

pub_date

2019-09-01 00:00:00

pages

812-817

issue

9

eissn

0933-7407

issn

1439-0507

journal_volume

62

pub_type

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