"Pyridazinones As Parp7 Inhibitors" in Patent Application Approval Process (USPTO 20230192664).

During viral infection PARP7 can bind to Sindbis virus (SINV) to promote viral RNA degradation (T. Kozaki et al., Mitochondrial damage elicits a TCDD-inducible poly(ADP-ribose) polymerase-mediated antiviral response. In the context of AHR signaling PARP7 acts as a negative feedback mechanism to regulate the expression of P4501A1 and P4501B1 (L. MacPherson et al., Aryl hydrocarbon receptor repressor and TIPARP (ARTD14) use similar, but also distinct mechanisms to repress aryl hydrocarbon receptor signaling. [Extracted from the article]