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Fig. 9. Wnt CM induces alteration in the protein levels of cadherins and
p57Kip2 in epithelial cells pre-treated with FGF2. Explants were
cultured for 5 days with control medium (lane F/C) or Wnt3a CM (lane F/W),
after pre-stimulation with FGF2 for 1 hour. Lens epithelium (lane LE) and
differentiating lens cells of the zone of early elongation at equator (lane
FC) were isolated from neonatal rat lens. Cell lysates were separated by 10%
SDS-PAGE and probed with antibodies against E-cadherin, N-cadherin,
p27Kip1 or p57Kip2. E-cadherin levels were decreased and
N-cadherin levels increased after treatment with FGF2/Wnt CM, consistent with
the changes seen during fiber cell differentiation (A). p57Kip2
levels increased in explants treated with FGF2/Wnt CM, similar to the increase
in differentiating fiber cells. However, p27Kip1 levels were not
affected by FGF2/Wnt CM, unlike the expression pattern seen in differentiating
fiber cells (B). Actin was used as a loading control.