Therapeutic gases

Therapeutic gases represent a unique pharmacological class of substances administered in gaseous form for the prevention, diagnosis, or treatment of various medical conditions. This category encompasses vital physiological gases like oxygen and medical air, as well as specialized signaling molecules such as nitric oxide, carbon monoxide, and hydrogen sulfide, alongside noble gases like xenon and helium (StatPearls, 2023). Unlike traditional pharmaceuticals, these agents are typically inhaled and exert their effects by interacting with specific biological targets such as hemoglobin, soluble guanylate cyclase, or various ion channels and enzymes (PubMed, PMC4274300). They play a critical role in managing acute respiratory failure, pulmonary hypertension, and providing anesthesia, while also showing promise in protecting tissues from ischemia-reperfusion injury and modulating inflammatory responses (PubMed, 22424606). However, the term 'Therapeutic gases' refers to a broad therapeutic modality rather than a single discrete molecular target, and their clinical use requires precise monitoring of delivery and physiological parameters to prevent toxicities such as oxidative damage or systemic cardiovascular instability (NIH, 2022).

Other names

Medical gasesMedicinal gasesInhaled therapeutic gasesGasotransmitters

Therapeutic gases function through diverse molecular mechanisms specific to each agent: Oxygen acts as a terminal electron acceptor in the mitochondrial electron transport chain to facilitate ATP production (StatPearls, 2023). Nitric oxide acts by binding to and activating soluble guanylate cyclase (sGC), which increases intracellular cGMP levels leading to smooth muscle relaxation and vasodilation (PubChem, CID 145068). Noble gases like Xenon and Nitrous Oxide provide anesthesia and neuroprotection by antagonizing N-methyl-D-aspartate (NMDA) receptors (PubMed, 22424606). Carbon monoxide and Hydrogen sulfide function as signaling gasotransmitters that modulate heme-containing proteins, ion channels, and inflammatory pathways to provide cytoprotection (PubMed, PMC4274300).