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| HUMAN SERUM-SENSITIVE TRYPANOSOMA-BRUCEI-RHODESIENSE - A COMPARISON WITH SEROLOGICALLY IDENTICAL HUMAN SERUM-RESISTANT CLONES |
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| Author(s): RIFKIN MR, DEGREEF C, JIWA A, LANDSBERGER FR, SHAPIRO SZ |
| Source: MOLECULAR AND BIOCHEMICAL PARASITOLOGY Volume: 66 Issue: 2 Pages: 211-220 Published: AUG 1994 |
| Times Cited: 22 References: 34 |
| Abstract: Trypanosoma brucei rhodesiense clones, which are susceptible to lysis by normal human serum, were isolated from 3 different human serum-resistant clones originally derived from strain ETat 1.10. Serologically, these pairs of serum-sensitive and serum-resistant clones displayed the same variant surface glycoprotein (VSG) on their surface. Acquisition of human serum sensitivity correlated with susceptibility to lysis by human high density lipoprotein, a trypanocidal factor in normal human serum. Analysis of these paired populations by two-dimensional gel electrophoresis of whole trypanosomes and various subcellular fractions failed to reveal any differences in mobility of VSG and other proteins. Northern blot analysis of mRNAs from serum-sensitive and serum-resistant clones showed no differences when probed with a previously described resistance-specific probe. In addition, the ethanolamine membrane transport system and the overall membrane lipid fluidity did not reveal any detectable biochemical or biophysical differences in membrane properties. If resistance to lysis is indeed mediated by membrane changes at the enzymatic or structural level, the data presented suggest that the gene products(s) responsible for this change in human serum sensitivity may be present in very small quantities. |
| Document Type: Article |
| Language: English |
Addresses:
1. ROCKEFELLER UNIV, NEW YORK, NY 10021 USA
2. FREE UNIV BRUSSELS, INST MOLEC BIOL, RHODE ST GENESE, BELGIUM
3. FREE UNIV BRUSSELS, AKAD ZIEKENHUIS, B-1090 BRUSSELS, BELGIUM
4. INT LAB RES ANIM DIS, NAIROBI, KENYA |
| Publisher: ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| Subject Category: Biochemistry & Molecular Biology; Parasitology |
| IDS Number: PE321 |
| ISSN: 0166-6851 |
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