PGC-1α expression was manipulated by plasmid-mediated overexpression or shRNA-mediated knockdown.Viral replication was quantified by qRT-PCR, and IFN-β secretion was assessed by ELISA.<h4>Results</h4>CP BVDV(NADL) infection caused mitochondrial structural damage and dysfunction, accompanied by persistent downregulation of PGC-1α and its downstream target TFAM. The gene discussed is PPARGC1A; the disease is infection.