Project description:We observed by flow cytometry a population of CD4 T cells expressing very high levels of the coreceptor CD4 and the ectoenzyme CD38 (termed CD4hiCD38hi) in the peripheral blood of patients from Sabah and Papua with Plasmodium falciparum or Plasmodium knowlesi malaria. CD4hiCD38 T cells express genes associated with type 1 regulatory T cells.
Project description:The purpose of this reasearch is to identify and evaluate the global gene expression of Plasmodium knowlesi blood-stage parasites and specifically compare the gene expression profiles of samples derived from ex vivo versus long-term in vitro cultures.
Project description:The purpose of this reasearch is to identify and evaluate the global gene expression of Plasmodium knowlesi blood-stage parasites and specifically compare the gene expression profiles of samples derived from ex vivo versus long-term in vitro cultures. For ex vivo samples, a rhesus monkey was infected with P. knowlesi to obtain ring iRBCs to establish a short-term culture to immediately collect ex vivo derived time points every 4 hours in the course of the parasite’s 24-hour life cycle. For in vivo samples, they were generated from the same clone in the ex vivo culture adapted to long-term in vitro culture and were collected every 4 hours in the course of the parasite's 24-hour life cycle. Two replicate experiments(Aa and Ha) were developed from in vitro cultures. Samples labeled with Cy5 were hybridized against a reference RNA pool labeled with Cy3, consisting of equal amounts of P. knowlesi RNA from each time point.
