C Representative immunofluorescence images of 53BP1 staining in liver from Trf2F/F mice treated with tamoxifen (to induce telomere uncapping) or vehicle and injected with the indicated ASOs or PBS as control. Scale bar, 10 µm. D RT-qPCR detection of Ace2 mRNA levels in livers of mice treated as in C (n = 5-8 mice per group). 