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Published on: December 4, 2015
CCL3L1 copy number and susceptibility to malaria
Danielle Carpenter1, Anna Färnert, Ingegerd Rooth
1Centre for Genetics and Genomics, School of Biology, University of Nottingham, Nottingham NG7 2UH, UK. danielle.carpenter@nottingham.ac.uk
Summary
This study explored chemokine gene CCL3L1 copy number variation and its link to malaria susceptibility in a Tanzanian family cohort. Lower CCL3L1 copy numbers showed potential protection against anemia.
Area of Science:
- Genetics
- Immunology
- Disease Susceptibility
Background:
- Complex diseases like malaria exhibit varied susceptibility.
- Copy number variation (CNV) in genes is a known factor in disease susceptibility.
- The chemokine gene CCL3L1's role in malaria susceptibility is unstudied.
Purpose of the Study:
- To investigate the association between CCL3L1 gene copy number variation and susceptibility to malaria.
- To analyze the impact of CCL3L1 CNV on malaria-related phenotypes such as parasite load, clinical infections, and hemoglobin levels.
- To explore CCL3L1 copy number haplotypes and their transmission patterns.
Main Methods:
- Family-based genetic analysis of a Tanzanian population (n=922).
- Measurement of CCL3L1 gene copy number using the paralogue ratio test (PRT).
- Phenotypic data collection included parasite load, clinical malaria episodes, and hemoglobin levels.
- Transmission disequilibrium testing (TDT) using microsatellites for copy number haplotype analysis.
Main Results:
- CCL3L1 copy numbers ranged from 1 to 10 copies per diploid genome (pdg).
- Significant copy number haplotype diversity was observed within families.
- Evidence suggests an association between low CCL3L1 copy number and protection against anemia.
Conclusions:
- CCL3L1 copy number variation is present in the studied population.
- Low CCL3L1 copy number may confer protection against anemia in the context of malaria.
- Further research is warranted to elucidate the precise mechanisms linking CCL3L1 CNV to malaria and anemia.
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