Induction of immunostimulatory cytokine genes expression in human PBMCs by a novel semiquinone glucoside derivative (SQGD) isolated from a Bacillus sp. INM-1
| Autor: | Veselina Gadjeva, Saurabh Mishra, Zlatka Georgieva Dobreva, Raj Kumar, Dev Dutt Patel, Lyuba Miteva, Rakesh Sharma, Deen Dayal Bansal, Spaska Stanilova |
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| Rok vydání: | 2011 |
| Předmět: |
Male
Cellular immunity medicine.drug_class medicine.medical_treatment Immunology Bacillus Biology Immunostimulant Peripheral blood mononuclear cell Interleukin-12 Subunit p35 Mice Glucosides Gene expression Benzoquinones Leukocytes medicine Animals Humans Cells Cultured Regulation of gene expression Interleukin-12 Subunit p40 Transcription Factor RelA Molecular biology Kinetics Cytokine Gene Expression Regulation Humoral immunity Interleukin-23 Subunit p19 TLR4 Cytokines |
| Zdroj: | Cellular Immunology. 267:67-75 |
| ISSN: | 0008-8749 |
| DOI: | 10.1016/j.cellimm.2010.11.005 |
| Popis: | In the present study, a semiquinone glucoside derivative (SQGD) isolated from a radioresistant bacterium Bacillus sp. INM-1 was evaluated for its immunostimulatory activities. Human peripheral blood mononuclear cells (PBMCs) were stimulated by different doses (30-90 microg/ml) of SQGD for different time (3-12h) intervals at 37°C, and IL-12p40, IL-23p19, IL-10, RelA and c-Jun gene expression analysis was carried out by qRT-PCR method. SQGD dose dependent cytokines protein expression kinetic analysis was carried out using western blotting. As the results of SQGD (30μg/ml) stimulation for 3h at 37°C, significant induction in IL-12p40, IL-23p19 and RelA gene expression was observed in PBMCs compared to unstimulated control cells. However, no such induction in IL-10 and c-Jun gene expression was observed. Time dependent protein expression study indicated significant increase in IL-12p40, IL-12p35, IL-23p19 and RelA protein expression at 3-6h, which was found decrease at 12h upon SQGD treatment. In contrast, IL-10 protein expression was found to enhance significantly at 12h after SQGD treatment to the PBMCs. SQGD dose dependent study showed approximately similar level of induction in IL-12p40, IL-12p35, IL-23p19 and RelA proteins expression at all tested concentration (30-90 microg/ml) compared to control. However, no significant change in the IL-10 and c-Jun protein expression was observed at any SQGD concentration. SQGD treatment (0.25mg/kgbwt.) was also found to enhance anti-keyhole Limpet Hemocynin (KLH) IgM antibodies significantly in the mice immunized by KLH. Thus, SQGD fraction stimulates cellular immunity by inducing immunostimulatory cytokines and humoral immunity by enhancing IgM antibodies and could be a promising immunostimulant. Further studies related to molecular mechanisms offering immunostimulation is underway, will certainly helpful to unravel its mode of action in the biological system. |
| Databáze: | OpenAIRE |
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