RO 20-1724, Phosphodiesterase 4 (PDE4) inhibitor

Supplementary information

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

Phosphodiesterase 4B (PDE4B) also known as PDE4B2 is an enzyme that specifically breaks down cyclic adenosine monophosphate (cAMP) to AMP an important process in cellular signaling. It belongs to the PDE4 family which is characterized by its ability to regulate the concentration of cAMP within cells. PDE4B has a molecular mass of approximately 75 kDa and is frequently expressed in immune cells including monocytes and neutrophils as well as in the brain.

Biological function summary

PDE4B plays a significant role in modulating intracellular signaling by controlling the levels of cAMP a second messenger involved in various cellular processes. As part of the larger PDE4 family complex PDE4B assists in fine-tuning immune responses and inflammatory processes. This enzyme modulates the activity of protein kinase A (PKA) impacting processes such as cell proliferation differentiation and apoptosis.

Pathways

PDE4B operates within the cAMP signaling pathway which is essential for transducing extracellular signals into cellular responses. This pathway involves interaction with other proteins such as PKA and CREB (cAMP response element-binding protein) which are critical for regulating gene expression and cellular functions. PDE4B's ability to modulate this pathway makes it fundamental in controlling the dynamics of cellular signaling.

PDE4B has been associated with inflammatory diseases such as asthma and chronic obstructive pulmonary disease (COPD). Its involvement in regulating cAMP levels affects the inflammatory response linking it to the pathogenesis of these conditions. Additionally PDE4B influences the activity of inflammatory mediators and cytokines contributing to disease progression and symptoms. For example PDE4 inhibitors can modulate these pathways presenting potential therapeutic opportunities for managing related inflammatory disorders.