Review Biological Treatments in Inflammatory Bowel Disease: A Complex Mix of Mechanisms and Actions Lorena Ortega Moreno 1,2,3 , Samuel Fernández-Tomé 1,3 and Raquel Abalo 4,5,6,7,* 1 Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, 28006 Madrid, Spain;
[email protected] (L.O.M.);
[email protected] (S.F.-T.) 2 Department of Medicine, Faculty of Medicine, Universidad Autónoma de Madrid, 28049 Madrid, Spain 3 Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), 28029 Madrid, Spain 4 Department of Basic Health Sciences, Faculty of Health Sciences, University Rey Juan Carlos (URJC), 28922 Alcorcón, Spain 5 High Performance Research Group in Physiopathology and Pharmacology of the Digestive System (NeuGut-URJC), URJC, 28922 Alcorcón, Spain 6 Associated I+D+i Unit to the Institute of Medicinal Chemistry (IQM), Scientific Research Superior Council (CSIC), 28006 Madrid, Spain 7 Working Group of Basic Sciences in Pain and Analgesia of the Spanish Pain Society (Grupo de Trabajo de Ciencias Básicas en Dolor y Analgesia de la Sociedad Española del Dolor), 28046 Madrid, Spain * Correspondence:
[email protected]; Tel.: +34-91-488-8854 Abstract: Inflammatory bowel disease (IBD) is a chronic disease that requires lifelong medication and whose incidence is increasing over the world. There is currently no cure for IBD, and the current ther- apeutic objective is to control the inflammatory process. Approximately one third of treated patients do not respond to treatment and refractoriness to treatment is common. Therefore, pharmacological Citation: Moreno, L.O.; treatments, such as monoclonal antibodies, are urgently needed, and new treatment guidelines are Fernández-Tomé, S.; Abalo, R.