Rapid colorectal adenoma formation initiated by conditional targeting of the Apc gene.
Familial adenomatous polyposis coli (FAP) is a disease characterized by the development of multiple colorectal adenomas, and affected individuals carry germline mutations in the APC gene. With the use of a conditional gene targeting system, a mouse model of FAP was created that circumvents the embryonic lethality of Apc deficiency and directs Apc inactivation specifically to the colorectal epithelium. loxP sites were inserted into the introns around Apc exon 14, and the resultant mutant allele (Apc580S) was introduced into the mouse germline. Mice homozygous for Apc580S were normal; however, upon infection of the colorectal region with an adenovirus encoding the Cre recombinase, the mice developed adenomas within 4 weeks. The adenomas showed deletion of Apc exon 14, indicating that the loss of Apc function was caused by Cre-loxP-mediated recombination.
Shibata
H
H
Department of Cell Biology, Cancer Institute, Toshima-ku, Tokyo 170, Japan.
Toyama
K
K
Shioya
H
H
Ito
M
M
Hirota
M
M
Hasegawa
S
S
Matsumoto
H
H
Takano
H
H
Akiyama
T
T
Toyoshima
K
K
Kanamaru
R
R
Kanegae
Y
Y
Saito
I
I
Nakamura
Y
Y
Shiba
K
K
Noda
T
T
D011125:Adenomatous Polyposis Coli / Q000235:genetics*; D025601:Adenomatous Polyposis Coli Protein; D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D003106:Colon / Q000378:metabolism; D003598:Cytoskeletal Proteins / Q000096:biosynthesis; D004195:Disease Models, Animal; D005091:Exons; D005260:Female; D016368:Frameshift Mutation; D017353:Gene Deletion; D018390:Gene Targeting; D017491:Genes, APC; D005822:Genetic Vectors; D018095:Germ-Line Mutation; D006720:Homozygote; D019426:Integrases / Q000235:genetics / Q000378:metabolism; D007438:Introns; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D011995:Recombination, Genetic; D014764:Viral Proteins
D025601:Adenomatous Polyposis Coli Protein; D003598:Cytoskeletal Proteins; D014764:Viral Proteins; C045073:Cre recombinase; D019426:Integrases