Novel Immunomodulatory Therapies for Respiratory Pathologies

Abstract

The respiratory tract is constantly exposed to environmental aggressions including allergens, infections, and pollution. The immune system is pivotal to fight potential invaders and prevent the establishment of infections in the respiratory tract; however, excessive, misplaced or altered immune responses contribute to increase tissue damage, impair lung function, and exacerbate respiratory diseases. Indeed, asthma, chronic obstructive pulmonary disease (COPD) and cystic fibrosis are respiratory diseases that have uncontrolled inflammation as a unifying severity factor. In addition, the acute inflammatory responses in pneumonia must be controlled to avoid progression to acute respiratory distress syndrome, which can be lethal. In this regard, immunomodulatory therapies are promising pharmacological strategies to treat important respiratory pathologies. Understanding the pathogenesis of respiratory disorders have paved the way for the development of cytokine-directed therapies, allosteric or non-allosteric inhibitors of inflammatory receptors and enzymes, agonists of resolution of inflammation and other anti-inflammatory compounds. A multitude of studies have evaluated the safety, pharmacokinetics, and pharmacodynamics of several molecules that target inflammation in the respiratory tract, yet only few have been translated to clinical use. This article will summarize important aspects of asthma, COPD, cystic fibrosis, and pneumonia focusing on the role of immune responses in disease development and novel immunomodulatory therapies.