title: Cell surface differences of Naegleria fowleri and Naegleria lovaniensis exposed with surface markers.
abstract: Differences in the distribution of diverse cell surface coat markers were found between Naegleria fowleri and Naegleria lovaniensis. The presence of carbohydrate-containing components in the cell coat of the two species was detected by selective staining with ruthenium red and alcian blue. Using both markers, N. fowleri presented a thicker deposit than N. lovaniensis. The existence of exposed mannose or glucose residues was revealed by discriminatory agglutination with the plant lectin Concanavalin A. These sugar residues were also visualized at the cell surface of these parasites either by transmission electron microscopy or by fluorescein-tagged Concanavalin A. Using this lectin cap formation was induced only in N. fowleri. The anionic sites on the cell surface detected by means of cationized ferritin were more apparent in N. fowleri. Biotinylation assays confirmed that even though the two amoebae species have some analogous plasma membrane proteins, there is a clear difference in their composition.
authors.affiliation: Department of Experimental Pathology, Center for Research and Advanced Studies, Mexico City, Mexico. goroa@cinvestav.mx
authors.forename: Arturo
authors.initials: A
authors.lastname: González-Robles
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Castañón
authors.forename: Ana Ruth
authors.initials: AR
authors.lastname: Cristóbal-Ramos
authors.forename: Verónica Ivonne
authors.initials: VI
authors.lastname: Hernández-Ramírez
authors.forename: Maritza
authors.initials: M
authors.lastname: Omaña-Molina
authors.forename: Adolfo
authors.initials: A
authors.lastname: Martínez-Palomo
mesh_terms: D000372:Agglutination Tests; D000423:Alcian Blue; D000818:Animals; D015415:Biomarkers / Q000032:analysis; D019921:Biotinylation; D002462:Cell Membrane / Q000737:chemistry / Q000648:ultrastructure; D004396:Coloring Agents; D003208:Concanavalin A; D005293:Ferritins; D005456:Fluorescent Dyes; D005947:Glucose / Q000032:analysis*; D008358:Mannose / Q000032:analysis*; D046529:Microscopy, Electron, Transmission; D009253:Naegleria / Q000737:chemistry / Q000648:ultrastructure*; D016848:Naegleria fowleri / Q000737:chemistry / Q000648:ultrastructure; D009195:Peroxidase; D012235:Rhodamines; D012430:Ruthenium Red; D013045:Species Specificity
chemical_list: D015415:Biomarkers; D004396:Coloring Agents; D005456:Fluorescent Dyes; D012235:Rhodamines; D003208:Concanavalin A; D012430:Ruthenium Red; D005293:Ferritins; D009195:Peroxidase; D005947:Glucose; D000423:Alcian Blue; D008358:Mannose