Figure 2.

Lactation failure in SirT1^ko/ko mice. (a) Whole mount analysis of the mammary tissues from virgin wild-type (+/+) and SirT1^ko/ko mice (ko/ko). Scale bar = 2 mm. (b) Histological analysis of the mammary tissues harvested from wild-type (+/+) and SirT1^ko/ko female mice on either day 13 of pregnancy (P13) or lactation day 1 (L1). Scale bars = 100 μm. (c) Immunofluorescence staining of milk production in the mammary tissues from wild-type (+/+) and SirT1^ko/ko mice on L1. Red and smear stains, mouse milk proteins; blue dots, nuclear staining of adipocytes, epithelial cells, and other cells in mammary tissues. Scale bars = 100 μm.