Related Experiment Videos
Effect of Nocardia rubra cell wall skeleton on interleukin 1 production from mouse peritoneal macrophages
N Inamura1, K Nakahara, Y Kuroda
1Exploratory Research Laboratories, Fujisawa Pharmaceutical Co. Ltd., Ibaraki, Japan.
Abstract:
Nocardia rubra cell wall skeleton (N-CWS) was shown to augment interleukin 1 (IL-1) production from peritoneal resident and exudate macrophages in C3H/HeN mice. The mol. wt of the N-CWS-induced IL-1 product was about 17,000 daltons, which is a similar weight to that obtained by lipopolysaccharide stimulation. The stimulation of IL-1 production by N-CWS was seen as early as 8 h after the start of incubation and peak production was observed at 48 h. Profound effects were seen with 10 micrograms/ml or more of N-CWS. Experiments on the regulation of the N-CWS-augmented IL-1 production showed that prostaglandin E2 inhibited the augmentation, and indomethacin (cyclo-oxygenase inhibitor) further augmented it. Leukotriene B4 and AA861 (lipoxygenase inhibitor) had no effect. Our findings suggest that the previously reported adjuvant effect of N-CWS may, in part, be mediated via its ability to stimulate IL-1 production; and that such a stimulation may be blocked by prostaglandins.
Insights
Nocardia rubra cell wall skeleton (N-CWS) enhances interleukin 1 (IL-1) production in mice macrophages. Prostaglandin E2 inhibits this N-CWS effect, suggesting a role in immune responses.
Area of Science:
- Immunology
- Microbiology
Background:
- Nocardia rubra cell wall skeleton (N-CWS) is known to have adjuvant properties.
- Interleukin 1 (IL-1) is a key cytokine in immune responses.
Purpose of the Study:
- To investigate the effect of Nocardia rubra cell wall skeleton (N-CWS) on interleukin 1 (IL-1) production.
- To explore the regulatory mechanisms of N-CWS-induced IL-1 production.
Main Methods:
- Macrophages from C3H/HeN mice were incubated with N-CWS.
- IL-1 production was measured over time.
- The effects of prostaglandin E2, indomethacin, leukotriene B4, and AA861 on IL-1 production were assessed.
Main Results:
- N-CWS significantly augmented IL-1 production, with peak levels at 48 hours.
- The N-CWS-induced IL-1 product had a molecular weight of approximately 17,000 daltons.
- Prostaglandin E2 inhibited N-CWS-augmented IL-1 production, while indomethacin further enhanced it.
Conclusions:
- N-CWS stimulates IL-1 production, potentially contributing to its adjuvant effect.
- Prostaglandins may play a role in regulating N-CWS-induced IL-1 production.