TY - JOUR A1 - Kippenberger, Stefan A1 - Zöller, Nadja Nicole A1 - Kleemann, Johannes A1 - Müller, Jutta A1 - Kaufmann, Roland A1 - Hofmann, Matthias A1 - Bernd, August A1 - Meissner, Markus A1 - Valesky, Eva Maria T1 - STAT6-dependent collagen synthesis in human fibroblasts is induced by bovine milk T2 - PLoS One N2 - Since the domestication of the urus, 10.000 years ago, mankind utilizes bovine milk for different purposes. Besides usage as a nutrient also the external application of milk on skin has a long tradition going back to at least the ancient Aegypt with Cleopatra VII as a great exponent. In order to test whether milk has impact on skin physiology, cultures of human skin fibroblasts were exposed to commercial bovine milk. Our data show significant induction of proliferation by milk (max. 2,3-fold, EC50: 2,5% milk) without toxic effects. Surprisingly, bovine milk was identified as strong inducer of collagen 1A1 synthesis at both, the protein (4-fold, EC50: 0,09% milk) and promoter level. Regarding the underlying molecular pathways, we show functional activation of STAT6 in a p44/42 and p38-dependent manner. More upstream, we identified IGF-1 and insulin as key factors responsible for milk-induced collagen synthesis. These findings show that bovine milk contains bioactive molecules that act on human skin cells. Therefore, it is tempting to test the herein introduced concept in treatment of atrophic skin conditions induced e.g. by UV light or corticosteroids. Y1 - 2015 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/37983 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-379836 SN - 1932-6203 N1 - Copyright: © 2015 Kippenberger et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited VL - 10 IS - (7): e0131783 SP - 1 EP - 15 PB - PLoS CY - Lawrence, Kan. ER -