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It has been suggested that the accumulation of biomolecular damage caused by reactive oxygen species (ROS) contributes to aging. The antioxidant activity is related to the ability of certain compounds to protect against the potentially harmful effect of processes or reactions involving ROS. This ability is associated with the termination of free radical propagation in biological systems. From  Heterotheca inuloides  various compounds which have shown to possess antioxidant capacity and scavenging ROS. The aim of this study was to determine the antioxidant capacity of additional natural components isolated from  H. inuloides  and some semisynthetic derivatives, their anti-inflammatory activity and the effect on  Caenorhabditis elegans  nematode life span. Compounds showed ability to inhibit various biological processes such as lipid peroxidation, scavenge nonbiological important oxidants such as  1 O 2 , OH ∙ , H 2 O 2 , and HOCl and scavenge non biological stable free radicals (DPPH). Some cadinane type compounds showed possess antioxidant, ROS scavenging capacity, anti-inflammatory activity, and effect on the  C. elegans  life span. Flavonoid type compounds increased the life of the nematode and quercetin was identified as the compound with the greatest activity. The modification of chemical structure led to a change in the antioxidant capacity, the anti-inflammatory activity, and the survival of the worm.

oxidative medicine and cellular longevity

Antioxidant Capacity of “Mexican Arnica”<i>Heterotheca inuloides</i>Cass Natural Products and Some Derivatives: Their Anti-Inflammatory Evaluation and Effect on<i>C. elegans</i>Life Span

Antioxidant Capacity of “Mexican Arnica”Heterotheca inuloidesCass Natural Products and Some Derivatives: Their Anti-Inflammatory Evaluation and Effect onC. elegansLife Span