APCDD1（APC down-regulated 1），癌症关联基因，基因ID：147495，这个位点编码wnt信号通路的抑制剂。该位点的突变与遗传性单纯性低富饶症有关。该基因的表达增加也可能与结直肠癌的发生有关。This locus encodes an inhibitor of the Wnt signaling pathway. Mutations at this locus have been associated with hereditary hypotrichosis simplex. Increased expression of this gene may also be associated with colorectal carcinogenesis.[provided by RefSeq， Sep 2010]。