Background: Vitiligo is characterized by selective destruction of melanocytes. Transforming growth factor beta 1 (TGFβ 1) is the main product of regulatory T cells (Tregs) which are deficient in vitiligo. Thus, lower levels of serum TGFβ 1 are expected in vitiligo. However, TGFβ 1 is a keratinocytederived cytokine with inhibitory effect on melanocyte activity. Thus it may be expected to be high...
