Expression levels of KIF1Bβ in primary neuroblastomas.
A, semi-quantitative RT-PCR analysis. Total RNA was prepared from
favorable (n = 16; stages 1 and 2, MYCN single copy) and
unfavorable (n = 16; stages 3 and 4, MYCN amplified)
neuroblastomas and subjected to semi-quantitative RT-PCR to examine the
expression levels of KIF1Bβ. Glyceraldehyde-3-phosphate
dehydrogenase (GAPDH) was used as an internal control. B,
quantitative real time PCR. Expression levels of KIF1Bβ were
standardized using the corresponding glyceraldehyde-3-phosphate dehydrogenase
value of each neuroblastoma sample. The relative expression levels of
KIF1Bβ in favorable (stages 1, 2, and 4s) and advanced (stages 3
and 4) neuroblastomas are shown (upper panel). Lower panel
shows a significant correlation between mono-allelic loss of
KIF1Bβ gene and its lower expression levels.