IL-4 Induces cAMP and cGMP in Human Monocytes
Author Information
Author(s): B. Dugas, N. Paul-Eugene, K. Yamaoka, C. Amirand, C. Damais, J. P. Kolb
Primary Institution: INSERM U313, Centre BioMedical des Cordeliers, Paris, France
Hypothesis
IL-4 may stimulate different NOS isoforms in resting and IFN-γ activated monocytes.
Conclusion
IL-4 induces the accumulation of cAMP and cGMP in human monocytes, which is dependent on the nitric oxide pathway.
Supporting Evidence
- IL-4 was found to induce an accumulation of cGMP and cAMP in unstimulated monocytes.
- The increase in cAMP was dependent on the concentration of IL-4.
- Different NOS may be expressed in monocytic cells depending on their differentiation and the signals they receive.
- IL-4-driven cGMP accumulation was almost totally abolished in the presence of NOS inhibitors.
- IL-4 stimulates an increase in intracytoplasmic free calcium in monocytic cells.
Takeaway
When a substance called IL-4 is added to certain immune cells, it helps them make two important molecules, cAMP and cGMP, which are like signals that tell the cells what to do.
Methodology
Monocytes were isolated from blood and incubated with IL-4 to measure cAMP and cGMP levels using specific radioimmunoassays.
Limitations
The clinical and immunological status of blood donors was largely unknown, which may affect the results.
Participant Demographics
Blood donors did not show contamination by HIV and hepatitis, but their clinical status was not known.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Want to read the original?
Access the complete publication on the publisher's website