Biochemistry of malaria parasite infected red blood cells by X-ray microscopy

• Published in: Scientific reports Vol. 7; no. 1; p. 802
• Main Authors: Kapishnikov, S., Leiserowitz, L., Yang, Y., Cloetens, P., Pereiro, E., Awamu Ndonglack, F., Matuschewski, K., Als-Nielsen, J.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 11.04.2017; Nature Publishing Group; Nature Portfolio
• Subjects: 631/45; 639/301/119; Electron Probe Microanalysis - methods; Erythrocytes - chemistry; Erythrocytes - metabolism; Erythrocytes - parasitology; Hemeproteins - analysis; Hemeproteins - metabolism; Hemoglobins - analysis; Hemoglobins - metabolism; Humanities and Social Sciences; Humans; Iron - analysis; Life Sciences; Malaria, Falciparum - blood; multidisciplinary; Plasmodium falciparum - pathogenicity; Potassium - analysis; Science; Science (multidisciplinary); Sulfur - analysis
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-017-00921-2

Red blood cells infected by the malaria parasite Plasmodium falciparum are correlatively imaged by tomography using soft X-rays as well as by scanning hard nano-X-ray beam to obtain fluorescence maps of various elements such as S and Fe. In this way one can deduce the amount of Fe bound either in hemoglobin or in hemozoin crystals in the digestive vacuole of the malaria parasite as well as determine the hemoglobin concentrations in the cytosols of the red blood cell and of the parasite. Fluorescence map of K shows that in the parasite’s schizont stage the K concentration in the red blood cell cytosol is diminished by a factor of seven relative to a pristine red blood cell but the total amount of K in the infected red blood cell is the same as in the pristine red blood cell.