Dill Extract Preserves Dermal Elastic Fiber Network and Functionality: Implication of Elafin

Area of Science:

• Dermatology
• Biochemistry
• Aging Research

Background:

• Aging degrades skin elastic fibers due to enzymatic breakdown and other factors.
• Dill extract shows promise in improving skin's mechanical properties and elastin expression.

Purpose of the Study:

• To investigate dill extract's effects on aging elastin fibers using an elastase digestion model.
• To elucidate the mechanism behind dill's action on elastin fibers.

Main Methods:

• Studied dill extract's effect on elastase-injured elastic fibers in 2D fibroblast cultures and mouse skin.
• Utilized elastin immunofluorescence, second harmonic generation microscopy, and oscillatory shear stress tests.
• Performed enzymatic assays and real-time qPCR to understand the underlying mechanism.

Main Results:

• Dill extract prevented in vitro and in vivo elastase digestion of elastin.
• Confirmed preservation of the cutaneous elastic network and properties in mice.
• Showed dill extract increases mRNA expression of elafin, an endogenous elastase inhibitor, without directly inhibiting elastase.

Conclusions:

• Dill extract counteracts elastase-induced damage to cutaneous elastic fibers.
• The mechanism involves modulating PI3 gene expression, leading to increased elafin.
• Suggests dill extract as a potential agent for preserving skin elasticity during aging.