Related Experiment Videos
Quantitative analysis of cytokine mRNA expression in peripheral blood mononuclear cells following treatment with
1Department of Surgery, Medical Institute of Bioregulation, Kyushu University, Beppu, Japan.
Abstract:
After activation with interleukin-2 (IL-2), peripheral blood mononuclear cells (PBMC) have been reported to induce the expression of mRNA coding various cytokines, including interleukin(IL)-1alpha, -1beta and tumor necrosis factor alpha (TNF alpha). We examined the cytokine mRNA expression of PBMC following treatment with IL-2 in vitro and in vivo by a quantitative method using the reverse transcription/polymerase chain reaction (RT-PCR). After stimulating PBMC with IL-2 in vitro, peak levels of IL-1alpha mRNA were reached between 3 h and 12 h, and thereafter declined. The IL-1beta expression increased, with levels peaking at 1-6 h and, had decreased by 96 h. The expression of TNF alpha was elevated both 1-3 h and 24-48 h after stimulation. The peak levels of IL-1alpha and -1beta mRNA and the early elevation of TNF alpha mRNA mainly accounted for the cytokine mRNA expression in adherent cells; however, the late induction of TNF alpha mRNA was observed in nonadherent cells. In patients with advanced carcinoma, the IL-1alpha and -1beta mRNA expression were elevated after IL-2 treatment for 5 consecutive days, while the expression of TNF alpha mRNA also increased. These results indicate that the quantitative RT-PCR method appears to be useful for analyzing the cytokine mRNA expression of PBMC after treatment with IL-2.
Insights
Interleukin-2 (IL-2) treatment increases cytokine mRNA expression in peripheral blood mononuclear cells (PBMC). Quantitative reverse transcription/polymerase chain reaction (RT-PCR) effectively analyzes these changes in vitro and in vivo.
Area of Science:
- Immunology
- Molecular Biology
- Cancer Research
Background:
- Peripheral blood mononuclear cells (PBMC) are crucial immune cells.
- Interleukin-2 (IL-2) is a cytokine that activates immune cells.
- Cytokine mRNA expression changes are important in immune responses.
Purpose of the Study:
- To examine cytokine mRNA expression (IL-1alpha, IL-1beta, TNF alpha) in PBMC after IL-2 treatment.
- To evaluate the utility of quantitative reverse transcription/polymerase chain reaction (RT-PCR) for this analysis.
- To investigate these changes in both in vitro and in vivo settings, including in cancer patients.
Main Methods:
- Quantitative reverse transcription/polymerase chain reaction (RT-PCR) was used to measure cytokine mRNA levels.
- PBMC were stimulated with IL-2 in vitro.
- PBMC samples were collected from advanced carcinoma patients undergoing IL-2 treatment.
Main Results:
- In vitro IL-2 stimulation led to peak IL-1alpha mRNA at 3-12h and IL-1beta mRNA at 1-6h.
- Tumor necrosis factor alpha (TNF alpha) mRNA showed early (1-3h) and late (24-48h) elevations.
- Adherent cells were primarily responsible for early cytokine mRNA expression, while nonadherent cells showed late TNF alpha induction.
- In cancer patients, IL-2 treatment increased IL-1alpha, IL-1beta, and TNF alpha mRNA expression.
Conclusions:
- Quantitative RT-PCR is a valuable method for analyzing cytokine mRNA expression in PBMC following IL-2 treatment.
- IL-2 significantly modulates the expression of key inflammatory cytokine mRNAs.
- Understanding these cytokine dynamics is relevant for immunotherapy and cancer treatment.