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Compared to untreated trophozoite pRBCs a decrease of 10% (P? http://www.selleck.cn/products/Verteporfin(Visudyne).html nutritional immune response effectively limits the availability of iron to invading pathogens (Skaar, 2010). Iron chelating agents suppress the growth of P.?falciparum in vitro and in vivo (Hershko & Peto, 1988; Gordeuk et?al, 1992). In addition, iron chelators also bolster the host innate immune http://www.selleckchem.com/products/VX-770.html response by synergistically acting with cytokines to increase stimulation of NO production, which is protective against severe malaria infection (Weiss et?al, 1997; Fritsche et?al, 2001). The importance of iron to malaria is additionally demonstrated by clinical studies that have documented an increased susceptibility to malaria infection in individuals given high doses of iron supplementation (Murray et?al, 1975; Smith et?al, 1989; Oppenheimer, 2001; Sazawal et?al, 2006). The sources of host iron used by P.?falciparum and the strategies used http://www.selleckchem.com/products/ch5424802.html by the parasite to evade host nutritional immunity have remained elusive. The labile iron pool represents the transition zone for iron between import, cellular utilization and storage and it is thought to change in response to the metabolic needs of the cell. As a cells' metabolic demand for iron increases, it will increase the amount of iron in the labile iron pool. The CA-AM LIP assay measures the LIP present in uninfected RBCs and pRBCs. Calcein fluorescence is sensitive to iron at physiological pH 7��2�C7��4 (Tenopoulou et?al, 2007). As RBC precursors mature, all their organelles are lost, producing an anucleate mature erythrocyte with a cytoplasm of pH 7��2�C7��4 (Tenopoulou et?al, 2007). At this pH, calcein is sensitive to iron and is able to detect the entire LIP. Upon infection of the RBC, P.?falciparum introduces new organelles and structures including: a nucleus, mitochondria, apicoplast, endoplasmic reticulum (ER) and golgi apparatus as well as a parasitophorous vacuole and a food vacuole with pH 3��7�C6��5 (Hayward et?al, 2006).