Pitstop® 2, cell-permeable clathrin inhibitor from Abcam

The clathrin inhibitor Pitstop 2 has been shown to selectively inhibit the interaction between β-arrestin and the β2-adaptin subunit of the clathrin adaptor protein AP-2, which is crucial for GPCR endocytosis. In a study, it was used to block agonist-promoted endocytosis of β2-adrenergic and V2-vasopressin receptors, demonstrating its role in dissecting the contributions of β-arrestin/AP2-dependent signaling pathways in GPCR internalization and signaling (beautrai2017).

Yes, Pitstop 2 has been utilized in studies examining the entry mechanisms of enteric adenoviruses, which rely on clathrin-mediated endocytosis for infection. The inhibitor was shown to significantly impact the internalization of these viruses in intestinal cell lines, highlighting its potential in understanding viral entry pathways (becker2023).

Indeed, Pitstop 2 has been employed in studies investigating JC polyomavirus entry into host cells. It was found that clathrin-mediated endocytosis is essential for the internalization of the virus, and treatment with Pitstop 2 reduced the efficiency of this process, indicating its role in viral infection dynamics (mayberry2019).

Research has indicated that clathrin-mediated endocytosis, which can be inhibited by Pitstop 2, is involved in the later stages of plasma membrane wound repair. The inhibitor was used to demonstrate that endocytosis is crucial for restoring cell homeostasis following membrane disruptions, thereby providing insights into cellular repair mechanisms (raj2024).