Background: Andrographolide (Andro) is a main active ingredient of the natural plant Andrographis
paniculata, which has special effects on bacterial infections and inflammatory diseases.
Objective: We previously synthesized Andrographolide derivatives AL-1 and investigated its anti-inflammatory
activity. For further research, we decided to modify the structure of AL-1 and expected to have better antiinflammatory
Methods: By conjugating with anti-inflammatory and anti-bacterial group, we designed and synthesized the andrographolide
derivative AL-2, AL-3 and AL-4. The anti-inflammatory activity of AL-2, AL-3 and AL-4 was
also evaluated by detecting cell activity and Nitric Oxide (NO) release.
Results: The new compounds AL-2, AL-3 and AL-4 increased cell viability in lipopolysaccharide (LPS)-induced
RAW 264.7 cell, which could have a certain anti-inflammatory activity, and inhibited the release of NO in cells to
reduce the inflammatory response of cells.
Conclusion: The new compounds AL-2, AL-3 and AL-4 may be candidates of anti-inflammatory drugs in the