RELATIONSHIPS BETWEEN CELL-SURFACE PROTEASE AND ACID-PHOSPHATASE ACTIVITIES OF LEISHMANIA PROMASTIGOTE

被引:7
作者
HERNANDEZ, AG
RASCON, A
KUTNER, S
ROMAN, H
CAMPOS, Z
机构
[1] Departamento de Biologia Celular, Facultad de Ciencias, Universidad Central de Venezuela, Apartado 47069, Los Chaguaramos, Caracas
[2] Department of Parasitology and the Kuvin Centre for the Study of Infectious and Tropical Diseases, The Hebrew University, Jerusalem
关键词
LEISHMANIA; CELL SURFACE; PROTEASE; ACID PHOSPHATASE; RADIO-IODINATION;
D O I
10.1007/BF01674430
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
A correlation between the ratio of the cell surface protease activity to phosphatase activity and the complexity of the pattern of cell surface exposed polypeptides of Leishmania promastigotes was demonstrated for various strains grown under similar conditions. The ratio of the cell surface protease activity to acid phosphatase activity was high for L. major and L.b. panamensis and it correlates with the expression of a single polypeptide of 63 kDa on their cell surface. Intermediate and lower ratios of these enzymatic activities relate with more complex radio-iodinated patterns: two main bands in L.b. guyanensis (70 and 58 KDa) and L.b. braziliensis (72 and 60 KDa) and three main bands 65, 50, 27 KDa in all L.m. mexicana strains tested. Evidence is presented that the acid phosphatase located on the L.m. mexicana cell surface is not an artifact due to a secondary absorption of the secreted acid phosphatase from the culture medium. These results confirm the Leishmania antigen cell surface heterogeneity. The implication on the biology of Leishmania and the clinical manifestation of leishmaniasis are discussed.
引用
收藏
页码:189 / 195
页数:7
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