title: Oxidation of fatty acids by Leishmania braziliensis panamensis.
abstract: Heating cultures of Leishmania braziliensis panamensis (grown at 26 degrees C) to 34 degrees C for 1.5-12 h transformed the cells to an ellipsoidally shaped form. The heat treatment caused an increase in the rate of oxidation of both medium and long chain fatty acids but decreased the rate of oxidation of [1-14C]glucose. The rate of fatty acid oxidation continued to increase for times as long as 20 h after returning the cultures to 26 degrees C. In both the promastigote and heat-induced ellipsoidal forms, the ratio of 14CO2 release from [1-14C]laurate to that from [12-14C]laurate was generally larger than four, whereas this ratio from [1-14C]oleate relative to [10-14C]oleate was approximately two. These data show that metabolic and morphological differentiation begin after a short heat treatment and that some metabolic changes may continue even after the reverse transformation is initiated. The data also suggest that either the omega-terminal portion of the fatty acids is not completely oxidized to acetyl CoA and/or that there are two functional fatty acid oxidation pathways in Leishmania.
mesh_terms: D000105:Acetyl Coenzyme A / Q000378:metabolism; D000818:Animals; D005227:Fatty Acids / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism; D006358:Hot Temperature; D007848:Laurates / Q000378:metabolism; D007891:Leishmania / Q000378:metabolism*; D007892:Leishmania braziliensis / Q000166:cytology / Q000378:metabolism*; D019301:Oleic Acid; D009829:Oleic Acids / Q000378:metabolism; D010084:Oxidation-Reduction; D010168:Palmitates / Q000378:metabolism
chemical_list: D005227:Fatty Acids; D007848:Laurates; D009829:Oleic Acids; D010168:Palmitates; D019301:Oleic Acid; D000105:Acetyl Coenzyme A; D005947:Glucose