RT Journal Article T1 Influence of TYK2 in systemic sclerosis susceptibility: a new locus in the IL-12 pathway. A1 López-Isac, Elena A1 Campillo-Davo, Diana A1 Bossini-Castillo, Lara A1 Guerra, Sandra G A1 Assassi, Shervin A1 Simeón, Carmen Pilar A1 Carreira, Patricia A1 Ortego-Centeno, Norberto A1 García de la Peña, Paloma A1 Spanish Scleroderma Group, A1 Beretta, Lorenzo A1 Santaniello, Alessandro A1 Bellocchi, Chiara A1 Lunardi, Claudio A1 Moroncini, Gianluca A1 Gabrielli, Armando A1 Riemekasten, Gabriela A1 Witte, Torsten A1 Hunzelmann, Nicolas A1 Kreuter, Alexander A1 Distler, Jörg Hw A1 Voskuyl, Alexandre E A1 de Vries-Bouwstra, Jeska A1 Herrick, Ariane A1 Worthington, Jane A1 Denton, Christopher P A1 Fonseca, Carmen A1 Radstake, Timothy Rdj A1 Mayes, Maureen D A1 Martín, Javier K1 Cytokines K1 Gene Polymorphism K1 Systemic Sclerosis K1 Treatment AB TYK2 is a common genetic risk factor for several autoimmune diseases. This gene encodes a protein kinase involved in interleukin 12 (IL-12) pathway, which is a well-known player in the pathogenesis of systemic sclerosis (SSc). Therefore, we aimed to assess the possible role of this locus in SSc. This study comprised a total of 7103 patients with SSc and 12 220 healthy controls of European ancestry from Spain, USA, Germany, the Netherlands, Italy and the UK. Four TYK2 single-nucleotide polymorphisms (V362F (rs2304256), P1104A (rs34536443), I684S (rs12720356) and A928V (rs35018800)) were selected for follow-up based on the results of an Immunochip screening phase of the locus. Association and dependence analyses were performed by the means of logistic regression and conditional logistic regression. Meta-analyses were performed using the inverse variance method. Genome-wide significance level was reached for TYK2 V362F common variant in our pooled analysis (p=3.08×10(-13), OR=0.83), while the association of P1104A, A928V and I684S rare and low-frequency missense variants remained significant with nominal signals (p=2.28×10(-3), OR=0.80; p=1.27×10(-3), OR=0.59; p=2.63×10(-5), OR=0.83, respectively). Interestingly, dependence and allelic combination analyses showed that the strong association observed for V362F with SSc, corresponded to a synthetic association dependent on the effect of the three previously mentioned TYK2 missense variants. We report for the first time the association of TYK2 with SSc and reinforce the relevance of the IL-12 pathway in SSc pathophysiology. YR 2015 FD 2015-09-02 LK http://hdl.handle.net/10668/10172 UL http://hdl.handle.net/10668/10172 LA en DS RISalud RD Apr 18, 2025