Acne-induced pathological scars: pathophysiology and current treatments.

Area of Science:

• Dermatology
• Immunology
• Pathology

Background:

• Acne vulgaris is a prevalent chronic inflammatory skin condition.
• It can lead to pathological scars (PSs), including hypertrophic scars and keloids, significantly impacting patient quality of life.
• The precise mechanisms underlying acne-induced PSs remain incompletely understood, complicating prevention and treatment.

Purpose of the Study:

• To elucidate the immunopathological mechanisms driving acne-induced pathological scars.
• To explore the role of inflammatory cells, fibroblasts, and immune cells in PS formation.
• To review current treatment strategies and identify gaps in managing acne-induced PSs.

Main Methods:

• Review of existing scientific literature on acne, inflammation, fibrosis, and scar formation.
• Analysis of immunopathological pathways involving T helper cells, regulatory T cells, and fibroblast activation.
• Examination of the interaction between acne treatments and PS development.

Main Results:

• Inflammatory changes, potentially from infection, are implicated in abnormal fibroblast proliferation.
• Activated fibroblasts, stimulated by inflammatory cells secreting growth factors and pro-inflammatory cytokines (IL-4, IL-13), contribute to PS formation.
• Regulatory T cells, through IL-10 and prostaglandin E2, exert anti-inflammatory and anti-fibrotic effects.

Conclusions:

• A complex interplay between inflammatory responses and fibrotic processes is central to acne-induced pathological scars.
• Targeting both inflammation and fibrosis may offer improved therapeutic strategies.
• Further research is needed to develop effective combination regimens for acne-induced PSs.