HO-1). In the BLM mouse model, ␣-MSH reduced skin fibrosis and collagen content and increased tissue levels of SOD2 and HO-1. In skin and HDFs from patients with SSc, both MC-1R and POMC messenger RNAs were detected, but there were no differences compared with healthy controls.Conclusion. Alpha-melanocyte-stimulating hormone and related peptides that exert their effects via MC-1R may provide a novel antifibrogenic therapeutic tool for the treatment of fibrotic diseases such as scleroderma.Fibrotic diseases are a major challenge in medicine with regard to both pathogenesis and therapeutic intervention. The clinical spectrum of such disorders comprises many organs and includes localized and systemic scleroderma (SSc), idiopathic pulmonary fibrosis, Presented by Dr. Kokot in partial fulfillment of the requirements for a PhD degree,