RT Journal Article T1 Obesity attenuates the effect of sleep apnea on active TGF-ß1 levels and tumor aggressiveness in patients with melanoma A1 Cubillos-Zapata, Carolina A1 Martínez-García, Miguel Ángel A1 Díaz-García, Elena A1 Jaureguizar, Ana A1 Campos-Rodríguez, Francisco A1 Sánchez-de-la-Torre, Manuel A1 Nagore, Eduardo A1 Martorell-Calatayud, Antonio A1 Hernández Blasco, Luis A1 Pastor, Esther A1 Abad-Capa, Jorge A1 Montserrat, Josep María A1 Cabriada-Nuño, Valentín A1 Cano-Pumarega, Irene A1 Corral-Peñafiel, Jaime A1 Arias, Eva A1 Mediano, Olga A1 Somoza-González, María A1 Dalmau-Arias, Joan A1 Almendros, Isaac A1 Farré, Ramón A1 López-Collazo, Eduardo A1 Gozal, David A1 García-Río, Francisco K1 TGF‑ß1 K1 Transforming growth factor beta1 K1 Skin neoplasms K1 Tumor K1 Obesity K1 Apnea K1 Leptin K1 Sleep K1 Factor de crecimiento transformador beta1 K1 Neoplasias cutáneas K1 Obesidad K1 Leptina K1 Sueño AB Active transforming growth factor-β1 (TGF-β1), a cytokine partially regulated by hypoxia and obesity, has been related with poor prognosis in several tumors. We determine whether obstructive sleep apnea (OSA) increases serum levels of active TGF-β1 in patients with cutaneous melanoma (CM), assess their relationship with melanoma aggressiveness and analyze the factors related to TGF-β1 levels in obese and non-obese OSA patients. In a multicenter observational study, 290 patients with CM were underwent sleep studies. TGF-β1 was increased in moderate-severe OSA patients vs. non-OSA or mild OSA patients with CM. In OSA patients, TGF-β1 levels correlated with mitotic index, Breslow index and melanoma growth rate, and were increased in presence of ulceration or higher Clark levels. In CM patients, OSA was associated with higher TGF-β1 levels and greater melanoma aggressiveness only in non-obese subjects. An in vitro model showed that IH-induced increases of TGF-β1 expression in melanoma cells is attenuated in the presence of high leptin levels. In conclusion, TGF-β1 levels are associated with melanoma aggressiveness in CM patients and increased in moderate-severe OSA. Moreover, in non-obese patients with OSA, TGF-β1 levels correlate with OSA severity and leptin levels, whereas only associate with leptin levels in obese OSA patients. PB Springer Nature YR 2020 FD 2020-09-23 LK http://hdl.handle.net/10668/4309 UL http://hdl.handle.net/10668/4309 LA en NO Cubillos-Zapata C, Martínez-García MÁ, Díaz-García E, Jaureguizar A, Campos-Rodríguez F, Sánchez-de-la-Torre M, et al. Obesity attenuates the effect of sleep apnea on active TGF-ß1 levels and tumor aggressiveness in patients with melanoma. Sci Rep. 2020 Sep 23;10(1):15528 DS RISalud RD Apr 11, 2025