Acetaminophen, COX-3 inhibitor

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Myoglobin is a well-known protein involved in oxygen binding within muscle tissues. It carries a molecular mass of approximately 16.7 kDa. Expressed mostly in cardiac and skeletal muscle it functions similarly to hemoglobin but operates within muscle cells. Another important protein Carbonic Anhydrase 2 (CA2) aids in the reversible hydration of carbon dioxide and is chiefly found in erythrocytes and renal tubules with a mass around 29 kDa. COX2 or Cyclooxygenase 2 plays a role in inflammation and pain through prostaglandin production and is expressed in various tissues under inflammatory conditions. Retinoic Acid Receptor alpha (RARα) and Retinoid X Receptor alpha (RXRA) are nuclear receptors engaged in gene regulation processes. FLAP is essential in leukotriene biosynthesis—an important component of inflammation.

Biological function summary

These proteins participate in significant physiological and cellular roles. Myoglobin for example stores oxygen in muscle cells enabling efficient muscle contraction. CA2 along with its isozymes like CA1 (expressed in RBCs) CA4 (on endothelial cells) and others regulates acid-base balance and fluid movement. COX2 acts in synthesizing signaling molecules involved in inflammation. RARα and RXRA often partnering in complexes control gene expression by regulating retinoic acid-responsive genes. FLAP's involvement in leukotriene synthesis connects it with immune responses and inflammation.

Pathways

These proteins integrate into critical biological processes. Myoglobin and CA2 along with CA1 and CA12 align in oxygen transport and carbon dioxide management within the respiratory and bicarbonate buffer systems. COX2 is involved in the arachidonic acid pathway closely aligned with inflammation and bleeding processes interacting with proteins such as prostaglandin E synthase. RARα and RXRA partake in the retinoic acid signaling pathway influencing numerous genes associated with differentiation and metabolism.

Altered levels or activities of these proteins relate to conditions like cardiovascular disease and cancer. CA2 and its related isoforms such as CA4 and CA7 show linkage to disorders including glaucoma and renal tubular acidosis. COX2 by fueling inflammation is connected to chronic inflammatory diseases like arthritis and certain cancers often alongside prostaglandins as mediators. RARα dysregulation is notably involved in acute promyelocytic leukemia while myoglobin release from damaged muscle can lead to myoglobinuria signaling muscle injury.