Antiinflammatory Effects of Functionally Active Compounds Isolated from Aged Black Garlic

Area of Science:

• Biochemistry
• Pharmacology
• Immunology

Background:

• Inflammation is a complex biological response implicated in numerous diseases.
• Aged black garlic (AGE) contains unique bioactive compounds.
• Identifying natural anti-inflammatory agents is a key research area.

Purpose of the Study:

• To investigate the anti-inflammatory effects of compounds AGE-1 and AGE-2 isolated from aged black garlic.
• To evaluate the impact of AGE-1 and AGE-2 on inflammatory mediators and signaling pathways in a cellular model.

Main Methods:

• Lipopolysaccharide (LPS)-induced inflammatory response model using RAW264.7 macrophages.
• Measurement of cell viability, nitric oxide (NO), prostaglandin E2 (PGE2), and pro-inflammatory cytokines (IL-6, TNF-α, IL-1β).
• Analysis of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) mRNA and protein expression via RT-PCR and Western blotting; assessment of MAPK signaling pathway phosphorylation.

Main Results:

• AGE-1 and AGE-2 were non-cytotoxic to macrophages.
• AGE-1 significantly inhibited NO and PGE2 production in a dose-dependent manner (IC50 values provided), while AGE-2 showed no significant effect.
• AGE-1 suppressed the secretion of IL-6, TNF-α, and IL-1β, reduced iNOS and COX-2 expression, and attenuated the phosphorylation of ERK, p38, and JNK signaling pathways.

Conclusions:

• Compound AGE-1 isolated from aged black garlic exhibits significant anti-inflammatory properties.
• AGE-1 effectively modulates key inflammatory mediators and signaling pathways.
• AGE-1 holds potential as a therapeutic agent for inflammatory conditions.