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Updated: Apr 30, 2026
Author Spotlight: Identifying Compensatory Pathways in Malaria Parasites Containing Hypomorphic Allele of Essential Protein Kinases
Published on: November 22, 2024
[Analysis of Pfcrt gene polymorphism in Plasmodium falciparum from imported cases]
Objective:
To identify the incidence of the K76T mutation in Pfcrt gene of imported Plasmodium falciparum and study the Pfcrt gene polymorphism in Plasmodium falciparum.
Methods:
Seventy-two blood samples were collected from patients infected with P. falciparum returning from Africa (Nigeria, Equatorial Guinea, Congo, Liberia, Angora and Mali) and Southeast Asia (Myanmar and Indonesia) from 2008 to 2012. According to Pfcrt gene sequence of P. falciparum, nested PCR primers were designed, and the reaction was applied with P. falciparum DNA in the blood samples as templates. PCR products were identified by Apo I digestion.
Results:
Among 72 blood samples of P. falciparum, mutant Pfcrt alleles were found in 41 samples (57.7%, 41/71) and wild type Pfcrt alleles were found in 30 samples (42.3%, 30/71). There were 25 samples (50%, 25/50) each with mutant Pfcrt alleles or wild type that were from Africa, while 16 samples (76.2%, 16/21) with mutant Pfcrt alleles and 5 samples (23.8%, 5/21) with wild type that were from Southeast Asia, respectively.
Conclusion:
The incidence of Pfcrt gene mutation is different in P. falciparum isolates from different regions.
Insights
The Plasmodium falciparum chloroquine resistance transporter (Pfcrt) gene mutation incidence varies geographically. Mutant Pfcrt alleles were more prevalent in Southeast Asian Plasmodium falciparum isolates compared to African ones.
Area of Science:
- Molecular biology
- Parasitology
- Genetics
Context:
- The Pfcrt gene is a key determinant of Plasmodium falciparum resistance to antimalarial drugs, particularly chloroquine.
- Imported Plasmodium falciparum strains from Africa and Southeast Asia represent diverse genetic backgrounds and potential resistance profiles.
Purpose:
- To determine the frequency of the K76T mutation in the Pfcrt gene of imported Plasmodium falciparum.
- To investigate the genetic polymorphism of the Pfcrt gene in Plasmodium falciparum isolates from different geographical regions.
Summary:
- A study analyzed 72 Plasmodium falciparum blood samples from travelers returning from Africa and Southeast Asia (2008-2012).
- Using nested PCR and Apo I digestion, mutant Pfcrt alleles were detected in 57.7% of samples (41/71), with higher prevalence in Southeast Asia (76.2%) compared to Africa (50%).
Impact:
- Findings highlight regional variations in Pfcrt gene mutations, crucial for understanding antimalarial drug resistance.
- This data informs malaria treatment strategies and drug resistance surveillance efforts globally.
