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| Status |
Public on Jul 01, 2021 |
| Title |
Expression patterns of Plasmodium falciparum clonally variant genes at the onset of a blood infection in non-immune humans [ChIP-seq] |
| Organism |
Plasmodium falciparum |
| Experiment type |
Genome binding/occupancy profiling by high throughput sequencing
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| Summary |
Clonally variant genes (CVGs) play fundamental roles in the adaptation of Plasmodium falciparum parasites to the fluctuating conditions of the human host, but their expression patterns under the natural conditions of the blood circulation have been characterized in detail only for a few specific gene families. Here we provide a detailed characterization of the full P. falciparum transcriptome across the full intraerythrocytic development cycle (IDC) at the onset of a blood infection in non-immune human volunteers. We found that the vast majority of transcriptional differences between parasites obtained from the volunteers and the parental parasite line maintained in culture occur for CVGs. Specifically, we observed a major increase in the transcript levels of most members of the pfmc-2tm and gbp families and of specific genes of other families, in addition to previously reported changes in var and clag3 genes. The expression patterns were almost identical between parasites obtained from the different volunteers. Large transcriptional differences correlate with changes in the distribution of histone modifications associated with heterochromatin, confirming their epigenetic nature. The analysis of parasites collected at different points along the infection indicates that when parasites pass through transmission stages, the epigenetic memory at CVG loci is lost, resulting in a reset of their expression state and reestablishment of new epigenetic patterns.
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| Overall design |
Samples from the NF54 parental line and V63 (parasites obtained from a volunteer who participated in a controlled human malaria infection trial) were processed to perform a ChIP-Seq experiment against H3K9me3.
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| Contributor(s) |
Pickford A, Michel-Todó L, Cortés A |
| Citation(s) |
34340541 |
| |
| Submission date |
Feb 08, 2021 |
| Last update date |
Sep 14, 2021 |
| Contact name |
Anastasia Pickford |
| E-mail(s) |
anastasia.pickford@isglobal.org
|
| Organization name |
ISGlobal
|
| Lab |
Malaria Epigenetics
|
| Street address |
Carrer Rosselló 153
|
| City |
Barcelona |
| State/province |
Barcelona |
| ZIP/Postal code |
08036 |
| Country |
Spain |
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| Platforms (1) |
| GPL21078 |
Illumina HiSeq 2500 (Plasmodium falciparum) |
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| Samples (4)
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| Relations |
| BioProject |
PRJNA700660 |
| SRA |
SRP305362 |
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