Genome sequencing of Plasmodium malariae reveals genetic differences and drug resistance mutations
Author Information
Author(s): Ibrahim Amy, Mohring Franziska, Manko Emilia, van Schalkwyk Donelly A., Phelan Jody E., Nolder Debbie, Borrmann Steffen, Adegnika Ayola A., Di Santi Silvia Maria, Alam Mohammad Shafiul, Mondal Dinesh, Nosten Francois, Sutherland Colin J., Moon Robert W., Clark Taane G., Campino Susana
Primary Institution: London School of Hygiene & Tropical Medicine, London, UK
Hypothesis
What are the genetic variations and mutations associated with drug resistance in Plasmodium malariae across different continents?
Conclusion
The study identifies significant genetic segregation between African and Asian isolates of Plasmodium malariae and highlights mutations linked to reduced susceptibility to pyrimethamine.
Supporting Evidence
- 251 P. malariae genomes were analyzed from 28 countries.
- 131,601 high-quality SNPs were identified.
- Distinct genetic segregation was observed between African and Asian isolates.
- Mutations in pmdhfr were linked to reduced susceptibility to pyrimethamine.
- CRISPR-Cas9 was used to validate the function of pmdhfr mutations.
- Circulating pmdhfr genotypes showed significant resistance to pyrimethamine.
- High prevalence of mutations associated with drug resistance was found in African isolates.
- Study provides a comprehensive genomic dataset for future malaria research.
Takeaway
Scientists studied a lot of malaria germs from different places and found that some of them are changing in ways that make them harder to treat with medicine.
Methodology
Whole genome sequencing was performed on 251 Plasmodium malariae isolates from 28 countries, followed by analysis of SNPs and validation of mutations using CRISPR-Cas9.
Potential Biases
Potential bias in sampling as most isolates were obtained from returning travelers rather than endemic populations.
Limitations
The study may not fully represent the genetic diversity of P. malariae due to the limited number of isolates from certain regions.
Participant Demographics
Isolates were collected from various regions including Africa, Asia, South America, and Oceania.
Statistical Information
P-Value
0.0043
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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