Bhatti, Gurjit KaurKhurana, AmitGarabadu, DebapriyaGupta, PrashantJawalekar, Snehal SainathBhatti, Jasvinder SinghNavik, Umashanker2024-01-212024-08-142024-01-212024-08-142021-07-029789813368279978981336826210.1007/978-981-33-6827-9_3http://10.2.3.109/handle/32116/4293Asthma is a chronic inflammatory disease described by impaired lung function, airway hyperresponsiveness, episodic wheezing, and dyspnea. Asthma prevalence has risen drastically, and it is estimated that more than 339 million individuals worldwide had asthma with marked heterogeneity in pathophysiology and etiology. Several factors involved in the progression and development of asthma include allergens, pollutants, obesity, viruses, antigens, and many more, eliciting strong inflammatory and immune responses, causing airflow obstruction, and tightening of respiratory smooth muscle causing the characteristic asthma symptoms. Multiple complex molecular pathways are involved in asthma pathophysiologies such as immunoglobulin E, cytokines, nitric oxide, dendritic cells, leukotrienes, oxidative stress, and inflammatory infiltrate of mast cells, neutrophils, eosinophils, lymphocytes, innate immunity, and many more. The current chapter focuses on illustrating the various molecular pathways that contribute to asthma development and its progression. � The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.en-USAirway hyperresponsivenessAsthmaCytokinesImmunityInflammationBook chapterhttps://link.springer.com/10.1007/978-981-33-6827-9_3