Do acne treatments affect insulin-like growth factor-1 serum levels? A clinical and laboratory study on patients with acne vulgaris.

Acne is a chronic inflammatory disease affecting sebaceous gland follicles. Lately, acne has considered an insulin-like growth factor-1 (IGF-1) mediated disease. Recent research demonstrated that IGF-1 levels decrease after 3 months of isotretinoin. The purpose of our study is evaluating the influence of acne treatments on IGF-1 serum levels. Forty-six subjects with acne vulgaris aged 14 to 30 years were subdivided into three groups according to their severity of acne and treated following the European Dermatology Forum guidelines. IGF-1 was measured in patients before and after the treatment and then compared to the IGF-1 of a healthy population of the same age. IGF-1 resulted higher in patients than in controls but there was not a statistically significant variation after treatment. To the best of our knowledge, this is the first study evaluating the influence of topical and systemic acne treatment on IGF-1 serum levels. In contrast with the literature, our results suggest that common therapies for acne are not able to significantly modify IGF-1 serum levels.