title: Influence of In Vitro IL-2 or IL-15 Alone or in Combination with Hsp 70 Derived 14-Mer Peptide (TKD) on the Expression of NK Cell Activatory and Inhibitory Receptors on Peripheral Blood T Cells, B Cells and NKT Cells.
abstract: Previous studies from Multhoff and colleagues reported that plasma membrane Hsp70 acts as a tumour-specific recognition structure for activated NK cells, and that the incubation of NK cells with Hsp70 and/or a 14-mer peptide derived from the N-terminal sequence of Hsp70 (TKDNNLLGRFELSG, TKD, aa 450-463) plus a low dose of IL-2 triggers NK cell proliferation and migration, and their capacity to kill cancer cells expressing membrane Hsp70. Herein, we have used flow cytometry to determine the influence of in vitro stimulation of peripheral blood mononuclear cells from healthy individuals with IL-2 or IL-15, either alone or in combination with TKD peptide on the cell surface expression of CD94, NK cell activatory receptors (CD16, NK2D, NKG2C, NKp30, NKp44, NKp46, NKp80, KIR2DL4, DNAM-1 and LAMP1) and NK cell inhibitory receptors (NKG2A, KIR2DL2/L3, LIR1/ILT-2 and NKR-P1A) by CD3+CD56+ (NKT), CD3+CD4+, CD3+CD8+ and CD19+ populations. NKG2D, DNAM-1, LAMP1 and NKR-P1A expression was upregulated after the stimulation with IL-2 or IL-15 alone or in combination with TKD in NKT, CD8+ T cells and B cells. CD94 was upregulated in NKT and CD8+ T cells. Concurrently, an increase in a number of CD8+ T cells expressing LIR1/ILT-2 and CD4+ T cells positive for NKR-P1A was observed. The proportion of CD8+ T cells that expressed NKG2D was higher after IL-2/TKD treatment, when compared with IL-2 treatment alone. In comparison with IL-15 alone, IL-15/TKD treatment increased the proportion of NKT cells that were positive for CD94, LAMP1 and NKRP-1A. The more potent effect of IL-15/TKD on cell surface expression of NKG2D, LIR1/ILT-2 and NKRP-1A was observed in B cells compared with IL-15 alone. However, this increase was not of statistical significance. IL-2/TKD induced significant upregulation of LAMP1 in CD8+ T cells compared with IL-2 alone. Besides NK cells, other immunocompetent cells present within the fraction of peripheral blood mononuclear cells were influenced by the treatment with low-dose interleukins themselves or in combination with hsp70 derived (TKD) peptide.
authors.affiliation: Department of Molecular Biology and Cell Pathology, Third Faculty of Medicine, Charles University, Prague, Ruska 87, 10 000 Prague 10, Czech Republic.
authors.forename: Ilona
authors.initials: I
authors.lastname: Hromadnikova
authors.affiliation: Department of Molecular Biology and Cell Pathology, Third Faculty of Medicine, Charles University, Prague, Ruska 87, 10 000 Prague 10, Czech Republic.
authors.forename: Shuang
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Molecular Biology and Cell Pathology, Third Faculty of Medicine, Charles University, Prague, Ruska 87, 10 000 Prague 10, Czech Republic.
authors.forename: Katerina
authors.initials: K
authors.lastname: Kotlabova
authors.affiliation: Haematological Sciences, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, NE2 4HH, United Kingdom.
authors.forename: Anne M
authors.initials: AM
authors.lastname: Dickinson
mesh_terms: D000293:Adolescent; D000328:Adult; D001402:B-Lymphocytes / Q000187:drug effects* / Q000378:metabolism; D015331:Cohort Studies; D018840:HSP70 Heat-Shock Proteins / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D066298:In Vitro Techniques; D019409:Interleukin-15 / Q000494:pharmacology*; D007376:Interleukin-2 / Q000494:pharmacology*; D007694:Killer Cells, Natural / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D010446:Peptide Fragments / Q000737:chemistry / Q000494:pharmacology*; D011971:Receptors, Immunologic / Q000378:metabolism*; D013601:T-Lymphocytes / Q000187:drug effects* / Q000378:metabolism; D055815:Young Adult
chemical_list: D018840:HSP70 Heat-Shock Proteins; D019409:Interleukin-15; D007376:Interleukin-2; D010446:Peptide Fragments; D011971:Receptors, Immunologic