A systematic effort to isolate kidney-specific genes was performed using re
cently described PCR-select methodology. Using this technique, a kidney-spe
cific mini-gene library was generated and a number of kidney-specific genes
that share significant homology to previously characterized kidney genes f
rom rats and other species were isolated. These included three renal-specif
ic transporters (an ADH water channel, the anion transporters RST and ROAT1
), a cell adhesion molecule (K-cadherin) and a kidney-specific protein upre
gulated in renal carcinoma (DD96). In addition, we isolated two novel genes
from a rat kidney. One of the genes shares limited homology to rat profili
n-1 while the other did not share any similarity to genes in the Genbank. N
orthern blot analysis revealed that the mRNA for each of these genes is exp
ressed in a highly kidney-restricted fashion. Our results suggested that ti
ssue-specific genes can be rapidly isolated and characterized using PCR-sel
ect techniques and this methodology may be generally applicable to isolate
specific genes from a variety of tissues. Copyright (C) 2001 S. Karger AG,
Basel.