Expression and Function of Low-Density Lipoprotein Receptors in CD3−CD16+CD56+Cells: Effect of Interleukin 2
| العنوان: | Expression and Function of Low-Density Lipoprotein Receptors in CD3−CD16+CD56+Cells: Effect of Interleukin 2 |
|---|---|
| المؤلفون: | I. Blanca, Danuta Radzioch, Nicolas E. Bianco, J. B. De Sanctis |
| المصدر: | Cellular Immunology. 167:18-29 |
| بيانات النشر: | Elsevier BV, 1996. |
| سنة النشر: | 1996 |
| مصطلحات موضوعية: | Interleukin 2, CD3 Complex, CD3, Immunology, Biology, Lymphocyte Activation, Interleukin 21, chemistry.chemical_compound, medicine, Humans, Cytotoxic T cell, Receptor, Receptors, IgG, Molecular biology, CD56 Antigen, Killer Cells, Natural, Lipoproteins, LDL, Receptors, LDL, Biochemistry, chemistry, Low-density lipoprotein, LDL receptor, biology.protein, Interleukin-2, lipids (amino acids, peptides, and proteins), Lipoprotein, medicine.drug |
| الوصف: | Low-density lipoprotein receptors (LDLR) have been shown to be expressed, internalized, and transcribed in CD3-CD16+CD56+ cells. Only a low percentage (up to 12%) of NK cells express LDLR. Interleukin 2 (IL-2) (1000 IU/ml) induced a threefold increase in the expression of LDLR on the cell surface that results from, at least in part, augmentation of LDLR turnover from the cytosol to the membrane. Scatchard analysis revealed that IL-2 decreased the Kd of LDLR binding for LDL from 7.53 to 4.33 nM with an increment in the number of binding sites from 2500 up to 5000. Both the proliferative response and cytotoxic functions of these cells are affected by LDL. Low concentrations of LDL induce an increase in the proliferative response (up to eightfold) and in the cytotoxic response of NK cells (up to fivefold). High concentration (more than 60 micrograms/ml) of LDL hampers both proliferative response and cytotoxic activity of NK cells. LDL did not affect the cytotoxic functions of IL-2-activated NK cells. Overall, we have shown that LDLR is expressed on the surface of NK cells and can be augmented by IL-2. Furthermore, we propose some insights into the mechanism responsible for the enhanced expression of LDLR on NK cell surface. In addition, our data clearly delineate that LDLR plays an important role in the regulation of proliferative responses and cytotoxic activity of these cells. |
| تدمد: | 0008-8749 |
| DOI: | 10.1006/cimm.1996.0003 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6137b756e0ba2590512f6a1cdbfa3954 https://doi.org/10.1006/cimm.1996.0003 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....6137b756e0ba2590512f6a1cdbfa3954 |
| قاعدة البيانات: | OpenAIRE |
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