PROBLEM TO BE SOLVED: To provide a model fish appropriate for, for instance, examining medicaments effective for human ADPKD (autosomal dominant polycystic kidney disease).SOLUTION: The model fish is a gene recombinant small fish obtained by transferring the mutant gene of a PKD2 gene so as to enable the dominant negative effect to be expressed. This fish is to be used as a model small fish with polycystic kidney disease. This model fish, which is not viviparous fatality in its phenotype, develops a polycystic kidney disease after growth, increases cysts as it grows, and can represent the conditions of the development and progression of the disease similar to those of human ADPKD.COPYRIGHT: (C)2009,JPO&INPIT【課題】ヒトADPKDに有効な薬剤検討等に適切なモデル魚類を提供する。【解決手段】ドミナントネガティブ効果を発現可能にPKD2遺伝子の変異遺伝子が導入されて得られる遺伝子組換え小型魚類を多発性嚢胞腎モデル小型魚類として用いる。このモデル小型魚類は、その表現型において、胎生致死でなく、成魚後多発性嚢胞腎を発症するとともにその魚令に伴い嚢胞は増加して、ヒトADPKDの同様の疾患の発症、進展経緯を示すことができる。【選択図】 なし