Resveratrol-based cinnamic ester hybrids: synthesis, characterization, and anti-inflammatory activity

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Molecular Biology

Background:

• Resveratrol is a natural polyphenol with known anti-inflammatory properties.
• Developing novel synthetic analogs can enhance therapeutic potential and bioavailability.
• Inflammation is implicated in numerous chronic diseases, necessitating new therapeutic strategies.

Purpose of the Study:

• To design and synthesize novel resveratrol-based cinnamic ester hybrids.
• To evaluate the anti-inflammatory activity of these novel compounds.
• To elucidate the molecular mechanisms underlying the anti-inflammatory effects of the most potent compound.

Main Methods:

• Synthesis of 23 novel resveratrol-based cinnamic ester hybrids.
• In vitro anti-inflammatory evaluation using lipopolysaccharide (LPS)-stimulated RAW264.7 cells.
• Measurement of nitric oxide (NO) production.
• Assessment of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) protein expression.
• Western blot analysis for phosphorylated p65 (p-p65) and phosphorylated IκB (p-IκB).
• Immunofluorescence to detect nuclear translocation of p65.

Main Results:

• Compound D15 demonstrated the most potent inhibition of NO production in LPS-stimulated RAW264.7 cells.
• Compound D15 significantly suppressed the LPS-induced expression of iNOS, COX-2, p-p65, and p-IκB proteins.
• Immunofluorescence confirmed that compound D15 reduces the activation and nuclear translocation of the NF-κB p65 subunit.

Conclusions:

• The synthesized resveratrol-based cinnamic ester hybrids possess significant anti-inflammatory potential.
• Compound D15 is a highly promising anti-inflammatory agent.
• The anti-inflammatory activity of compound D15 is partly mediated through the inhibition of the NF-κB signaling pathway.