Wound healing is complex. Injured tissues undergo a multi-phase process from hemostasis to tissue remodeling. And defensin plays a role.

Basically, it's your natural mechanism for healing a wound, and it stimulates a specific stem cell, the LGR6+ stem cell, according to Greg Keller, M.D., who presented Clinical Data with Defensins at the Global Aesthetic Conference in Miami earlier this month.

After activation, LGR6+ stem cells physically migrate into the basal layer of the skin and create a new epidermis, and eventually, new, younger-acting skin, says Dr. Keller.

In her Cosmeceutical Critique of The role of defensins in treating skin aging, Leslie Baumann, M.D., writes, LGR6+ stem cells, which are dormant until they are activated to respond to damage, are stimulated by defensins.1

She effectively summarizes their role in anti-aging as:

Old fibroblast and keratinocytes are sluggish and lazy. Old cells do not hear signals as well as younger cells. LGR6+ stem cells repopulate the epidermis with new, young keratinocytes. Defensin stimulates LGR6+ stem cells. The defensin/LGR6+ pathway plays a role in keratinization. Using topical defensin can improve the skins appearance.

Theoretically, says Dr. Keller, hair follicles provide a way for defensins to enter the skin to activate the LGR6+ pathway, but We wanted to actually measure wrinkles and quantify how much better the skin was in terms of pore size, oiliness, wrinkles, and the like.

So he, Amy Taub, M.D., Vivian Bucay, M.D., Jay Williams, Ph.D, and Darius Mehregan, M.D., conducted a participant- and investigator-blinded, placebo-controlled, multi-center study with the defensin-containing DefenAge 3-step system (Progenitor Biologics) that includes the 2-Minute Reveal Masque, 24/7 Barrier Balance Cream and 8-in-1 BioSerum, on 44 women, 41-71 years of age with skin types I to V.2

References:

1. Taub A, Bucay V, Keller G, Williams J, Mehregan D. Multi-Center, Double-Blind, Vehicle-Controlled Clinical Trial of an Alpha and Beta Defensin-Containing Anti-Aging Skin Care Regimen With Clinical, Histopathologic, Immunohistochemical, Photographic, and Ultrasound Evaluation. J Drugs Dermatol. 2018;17(4):426-441.2. Bauman L. The role of defensins in treating skin aging. Cosmeceutical Critique. MDedge Dermatology. April 1, 2018. Accessed November 13, 2019. Available at: https://www.mdedge.com/dermatology/article/161149/aesthetic-dermatology/...

See more here:
Defensins and the dermis - Dermatology Times