A set of microsatellite markers to differentiate Plasmodium falciparum progeny of four genetic crosses.

Journal Article (Journal Article)

BACKGROUND:Four Plasmodium falciparum genetic crosses (HB3×3D7, HB3×Dd2, 7G8×GB4, and 803×GB4) have produced sets of recombinant progeny that are widely used for malaria research, including investigations of anti-malarial drug resistance. It is critical to maintain the progeny free from cross-contamination. Microsatellite polymorphisms can be used to validate parasite identity. RESULTS:A set of 12 markers was developed that differentiates the parents of the four P. falciparum crosses. This typing set identified distinguishing patterns of inheritance (fingerprints) in segregant collections of 15 progeny clones from HB3×3D7, 32 from HB3×Dd2, 33 from 7G8×GB4, and 81 from 803×GB4. Stronger amplification was observed with shorter relative to longer alleles of individual microsatellites. In experiments with mixed parental DNAs, electropherograms showed that signals of cross-contamination can be missed when minor peaks less than 1/4 or 1/3 the height of the major peak are disregarded by threshold settings commonly used for population studies. CONCLUSIONS:Microsatellite typing is an effective method to check the identity of P. falciparum lines and detect parasite cross-contamination in cultures; however, care must be taken not to ignore minor peaks that can be overlooked. The 12 microsatellite markers presented here provide a rapid and efficient means to distinguish the segregants of laboratory crosses. Fingerprint patterns from these markers are useful to maintain the integrity of diverse parasite lines in and between research laboratories.

Full Text

Duke Authors

Cited Authors

  • Figan, CE; Sá, JM; Mu, J; Melendez-Muniz, VA; Liu, CH; Wellems, TE

Published Date

  • February 2, 2018

Published In

Volume / Issue

  • 17 / 1

Start / End Page

  • 60 -

PubMed ID

  • 29394891

Pubmed Central ID

  • PMC5797376

Electronic International Standard Serial Number (EISSN)

  • 1475-2875

International Standard Serial Number (ISSN)

  • 1475-2875

Digital Object Identifier (DOI)

  • 10.1186/s12936-018-2210-z


  • eng