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Phenotypes Associated with This Genotype
Genotype
MGI:5827758
Allelic
Composition
Tg(MMTV-rtTA)1Lach/0
Tg(tetO-Kras2)12Hev/0
Tg(tetO-MYC)1Lach/0
Genetic
Background
involves: FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Tg(MMTV-rtTA)1Lach mutation (0 available)
Tg(tetO-Kras2)12Hev mutation (1 available)
Tg(tetO-MYC)1Lach mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• diffuse mammary hyperplasia is seen at 7 days after doxycycline administration, numerous tumor nodules are seen throughout the glandular tree at 14 days and confluent tumors are present at 21 days
• removal of doxycycline results in apoptosis and reduced proliferation of tumors
• after doxycycline withdrawal, almost all of the transformed mammary glands completely regress to a nonpalpable state within 2 weeks
• solitary mammary tumors develop after withdrawal of doxycycline in 20 of 36 mice at a median age of 53 weeks, indicating recurrent tumors
• in the absence of doxycycline, only one of 31 mice develop a mammary tumor
• tumor recurrence is associated with reactivation of oncogenic transgenes and somatic mutations in the rtTA transgene

integument
• diffuse mammary hyperplasia is seen at 7 days after doxycycline administration, numerous tumor nodules are seen throughout the glandular tree at 14 days and confluent tumors are present at 21 days
• removal of doxycycline results in apoptosis and reduced proliferation of tumors
• after doxycycline withdrawal, almost all of the transformed mammary glands completely regress to a nonpalpable state within 2 weeks
• solitary mammary tumors develop after withdrawal of doxycycline in 20 of 36 mice at a median age of 53 weeks, indicating recurrent tumors
• in the absence of doxycycline, only one of 31 mice develop a mammary tumor
• tumor recurrence is associated with reactivation of oncogenic transgenes and somatic mutations in the rtTA transgene
• diffuse mammary hyperplasia is seen at 7 days after doxycycline administration

endocrine/exocrine glands
• diffuse mammary hyperplasia is seen at 7 days after doxycycline administration, numerous tumor nodules are seen throughout the glandular tree at 14 days and confluent tumors are present at 21 days
• removal of doxycycline results in apoptosis and reduced proliferation of tumors
• after doxycycline withdrawal, almost all of the transformed mammary glands completely regress to a nonpalpable state within 2 weeks
• solitary mammary tumors develop after withdrawal of doxycycline in 20 of 36 mice at a median age of 53 weeks, indicating recurrent tumors
• in the absence of doxycycline, only one of 31 mice develop a mammary tumor
• tumor recurrence is associated with reactivation of oncogenic transgenes and somatic mutations in the rtTA transgene
• diffuse mammary hyperplasia is seen at 7 days after doxycycline administration

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
breast cancer DOID:1612 OMIM:114480
J:114480


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
04/30/2024
MGI 6.23
The Jackson Laboratory