Altered hair cycling in Dgat1-/- mice.
a, schematic of the first two postnatal hair cycles in
Dgat1-/- and wild-type mice (P44, n = 6/genotype;
P63, n = 5/genotype; n = 3/genotype at all other time
points). A, anagen (black); C, catagen (black
gradient); T, telogen (white). b, precocious
onset of second anagen in Dgat1-/- mice.
Dgat1-/- and wild-type mice were shaved on P51 and
photographed at various time points thereafter. Precocious anagen onset is
evident in Dgat1-/- mice by the appearance of new hair at
P63 and complete regrowth of hair by P76 (n = 5/genotype).
c, retinoid deprivation modulates the onset of the second anagen
phase in Dgat1-/- mice. Schematic time line depicting the
onset of the second postnatal anagen phase in five retinoid-depleted
Dgat1-/- mice compared with the average age of onset of
second anagen in chow-fed Dgat1-/- and wild-type mice
(32). T, telogen
(white bar); A, anagen (black bar). RD,
retinoid-deficient; RS, retinoid-sufficient.