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| Content Provider | PubMed Central |
|---|---|
| Author | Mukherjee, R. Chaturvedi, P. Chaturvedi, U. C. |
| Abstract | Dengue type 2 virus (DV)-induced suppressor cytokine (SF) binds to macrophages to transmit the suppressor signal to recruit the second subpopulation of suppressor T cells. The present study was undertaken to identify and purify the receptor for SF (SF-R) on macrophages. The binding of 125I-SF to macrophages was saturable and reversible. Scatchard analysis showed the presence of both high (54,000/cell) and low (1.78 x 10(6)/cell) affinity receptor sites. The binding of 125I-SF to macrophages was inhibited by pretreatment of macrophages with anti-SF antiserum but not by a heterologous antiserum. Normal mouse peritoneal macrophage membrane was solubilized with Triton-X-100 and the components separated by low pressure liquid chromatography (LPLC) to purify SF-R. The presence of SF binding moiety (SF-R) was screened at each step of purification. The purified SF-R resolved into two bands of 45-50 kD mol. wt on SDS-PAGE. 125I-SF+SF-R complex run on SDS-PAGE showed a single band at about 55-60 kD mol. wt by autoradiography. Anti-SF-R antiserum reacted with SF-R in a Western blot test; the reaction was abolished by pretreatment of the blots with proteinase K, but not by pretreatment with periodic acid. SF-R was composed of two polypeptide chains (alpha and beta) which were obtained in pure form by high performance liquid chromatography (HPLC) of dithiothreitol- and iodoacetamide-treated SF-R. Only the beta chain bound SF. |
| Starting Page | 257 |
| File Format | |
| ISSN | 13652249 |
| e-ISSN | 13652249 |
| Journal | Clinical and Experimental Immunology |
| Issue Number | 2 |
| Volume Number | 91 |
| Language | English |
| Publisher Date | 1993-02-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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