Polymorphism analysis of microsatellite marker loci of Plasmodium falciparum from different geographical origins
10.16250/j.32.1374.2017238
- VernacularTitle:不同地理来源恶性疟原虫微卫星标记位点多态性研究
- Author:
He YAN
1
,
2
,
3
,
4
;
Jun FENG
1
,
2
,
3
,
4
;
Jian-hai YIN
1
,
2
,
3
,
4
;
Tian-mu CHEN
1
,
2
,
3
,
4
;
Shui-sen ZHOU
1
,
2
,
3
,
4
Author Information
1. National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention
2. WHO Collaborating Centre for Tropical Diseases
3. National Center for International Research on Tropical Diseases, Ministry of Science and Technology
4. Key Laboratory of Parasite and Vector Biology, National Health Commission, Shanghai 200025, China
- Publication Type:Journal Article
- Keywords:
Plasmodium falciparum;
Microsatellite;
Polymorphism;
Southeast Asia;
Africa
- From:
Chinese Journal of Schistosomiasis Control
2018;30(5):504-507
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the genetic diversity of imported Plasmodium falciparum by Polyα and TAA87 microsatellite markers in Southeast Asian and African geographical isolates. Methods Ninety-two and 126 filter paper samples from patients infected with P. falciparum from Southeast Asia (Myanmar) and Africa (Ghana) were collected, respectively. Two neutral microsatellite loci, Polyα and TAA87 were amplified by PCR. The length of PCR fragments was detected by capillary electrophoresis. The allele frequency and expected heterozygosity (He) were calculated by Excel 2010 and GenALEx 6.0 software. Results A total of 146 P. falciparum samples were analyzed as single infection samples with a total of 26 alleles in locus Polyα and 12 alleles in locus TAA87. The mean He value of the two loci was 0.86 ± 0.02. Ten alleles in locus Polyα and 8 alleles in locus TAA87 were distributed in Myanmar isolates, with the He values of 0.86 and 0.81 respectively. Fifteen alleles in locus Polyα and 11 in locus TAA87 were detected in Ghana isolates, with the He values of 0.91 and 0.86 respectively. In addition, the haplotype of 174 bp (Polyα) and 113 bp (TAA87) were only detected in Myanmar isolates with more than 17% gene frequency, whereas they were absent in Ghana isolates. Conclusions The two different geographical sources of imported P. falciparum strains have different allele frequencies and haplotypes at the two neutral microsatellite markers, Polyα and TAA87. Therefore, these two microsatellite loci may be considered as the potential molecular marker candidates for identifying P. falciparum strains with different geographical sources.
