Fig. 4. lin-23(ot1) mutants display a mild cdc-25.1-dependent
intestinal-specific hyperplasia during embryogenesis. (A) DIC/GFP
overlays of wild-type and lin-23(ot1) L1 hatchlings expressing the
intestinal-specific elt-2::gfp marker. The wild-type larvae hatch
with 20 intestinal cells, whereas the lin-23(ot1) mutants typically
display mild intestinal hyperplasia (here, 28 intestinal cells). (B)
Quantification of intestinal cell number in L1 hatchlings at 20°C
(n=40). The cdc-25.1(gf) and lin-23(ot1)
hyperplasia are not additive, whereas the loss-of-function
cdc-25.1(rr36) intragenic mutation significantly suppresses both the
cdc-25.1(rr31) and the lin-23(ot1)-dependent cell cycle
defects. Similar results were observed after hypomorphic
cdc-25.1(RNAi) treatment of cdc-25.1(rr31) (data not shown)
and lin-23(ot1).