A, B. Western blot analysis showed that the levels of Sel1L and Hrd1 were significantly decreased in the sciatic nerve of 3-w-old Sel1L cKO mice compared to control mice. C. S100 and Hrd1 double labeling revealed a dramatic reduction of Hrd1 immunoreactivity in SCs in the sciatic nerve of 3-w-old Sel1L cKO mice compared to control mice. D, E. Western blot analysis showed the elevated levels of p-eIF2α, CHOP, and cATF6α in the sciatic nerve of 3-w-old Sel1L cKO mice compared to control mice. F. Real time-PCR analysis revealed that the level of XBP1s mRNA was significantly increased in the sciatic nerve of 3-w-old Sel1L cKO mice compared to control mice. Scale bars: 50 μm. N = 4 animals. Statistical analyses were done with a t-test. Error bars represent SD, P < 0.05.