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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Cdkn1b+
wild type
MGI:3053659
Summary 12 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Cdkn1btm1Mlf/Cdkn1b+ involves: 129S4/SvJaeSor MGI:3611804
ht2
Cdkn1btm3Jro/Cdkn1b+ involves: 129S4/SvJaeSor MGI:3613028
ht3
Cdkn1btm1Mlf/Cdkn1b+ involves: 129S4/SvJaeSor * C57BL/6NHsd MGI:3719055
cn4
Cdkn1btm1Ako/Cdkn1b+
Ptentm2.1Ppp/Ptentm2.1Ppp
Tg(TPO-cre)1Shk/0
129S1.Cg-Cdkn1btm1Ako Tg(TPO-cre)1Shk Ptentm2.1Ppp MGI:4838319
cn5
Cdkn1btm1Mlf/Cdkn1b+
Crebbptm1Jvd/Crebbptm1Jvd
Tg(MMTV-cre)4Mam/0
involves: 129 * C57BL/6 * CBA * FVB MGI:3618584
cx6
Cdkn1btm1Mlf/Cdkn1b+
Vsx2tm1.1Eml/Vsx2tm1.1Eml
involves: 129 * C57BL/6 MGI:5449369
cx7
Cdkn1btm1Mlf/Cdkn1b+
Myctm1Atp/Myc+
involves: 129P2/OlaHsd * 129S4/SvJaeSor * FVB/N MGI:3811822
cx8
Cdkn1btm1Mlf/Cdkn1b+
Ptch1tm1Mps/Ptch1+
involves: 129S1/Sv * 129S4/SvJaeSor * 129X1/SvJ * C57BL/6 MGI:5544754
cx9
Cdkn1btm1Kin/Cdkn1b+
Irs2tm1Mfw/Irs2tm1Mfw
involves: 129S1/Sv * 129X1/SvJ * C57BL/6J MGI:3529771
cx10
Cdkn1btm1Ako/Cdkn1b+
KitW-v/KitW-v
involves: 129S1/Sv * C57BL/6J MGI:5811261
cx11
Cdkn1btm1Mlf/Cdkn1b+
Tg(TG-TPR/NTRK1)#Rstn/0
involves: 129S4/SvJaeSor * C3H * C57BL/6 * C57BL/6J MGI:5581427
cx12
Cdkn1btm1Kin/Cdkn1b+
Leprdb/Leprdb
involves: C57BL/6J * C57BLKS/J MGI:3529778


Genotype
MGI:3611804
ht1
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Genetic
Background
involves: 129S4/SvJaeSor
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• similar increase in the incidence of urethane-induced lung tumors as homozygotes, with more large tumors than in wild-type
• increased incidence of liver hemangiomas, uterine tumors, and ovarian granulose cell tumors after 20 weeks of urethane treatment, but less than in homozygotes

homeostasis/metabolism
• similar increase in the incidence of urethane-induced lung tumors as homozygotes, with more large tumors than in wild-type
• increased incidence of liver hemangiomas, uterine tumors, and ovarian granulose cell tumors after 20 weeks of urethane treatment, but less than in homozygotes




Genotype
MGI:3613028
ht2
Allelic
Composition
Cdkn1btm3Jro/Cdkn1b+
Genetic
Background
involves: 129S4/SvJaeSor
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm3Jro mutation (0 available); any Cdkn1b mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• larger than wild-type but smaller than homozygotes




Genotype
MGI:3719055
ht3
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Genetic
Background
involves: 129S4/SvJaeSor * C57BL/6NHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hearing/vestibular/ear
• at P6, heterozygotes display occasional supernumerary inner hair cells throughout the organ of Corti; never observed in wild-type mice
• in contrast, the heterozygous outer hair cell population remains normal relative to wild-type mice

nervous system
• at P6, heterozygotes display occasional supernumerary inner hair cells throughout the organ of Corti; never observed in wild-type mice
• in contrast, the heterozygous outer hair cell population remains normal relative to wild-type mice




Genotype
MGI:4838319
cn4
Allelic
Composition
Cdkn1btm1Ako/Cdkn1b+
Ptentm2.1Ppp/Ptentm2.1Ppp
Tg(TPO-cre)1Shk/0
Genetic
Background
129S1.Cg-Cdkn1btm1Ako Tg(TPO-cre)1Shk Ptentm2.1Ppp
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Ako mutation (0 available); any Cdkn1b mutation (26 available)
Ptentm2.1Ppp mutation (0 available); any Pten mutation (86 available)
Tg(TPO-cre)1Shk mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mean survival is 58 weeks of age

neoplasm
• no sex differences in development of adenomas
• no sex differences in development of carcinomas

endocrine/exocrine glands
• no sex differences in development of adenomas
• no sex differences in development of carcinomas




Genotype
MGI:3618584
cn5
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Crebbptm1Jvd/Crebbptm1Jvd
Tg(MMTV-cre)4Mam/0
Genetic
Background
involves: 129 * C57BL/6 * CBA * FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
Crebbptm1Jvd mutation (2 available); any Crebbp mutation (100 available)
Tg(MMTV-cre)4Mam mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• considerably accelerated tumor development

endocrine/exocrine glands
• considerably accelerated tumor development

hematopoietic system
• considerably accelerated tumor development

immune system
• considerably accelerated tumor development




Genotype
MGI:5449369
cx6
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Vsx2tm1.1Eml/Vsx2tm1.1Eml
Genetic
Background
involves: 129 * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
Vsx2tm1.1Eml mutation (0 available); any Vsx2 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• substantial improvements in tissue histology and retinal neurogenesis compared to mice homozygous for Vsx2tm1.1Eml alone
• rescue in the peripheral region is not as strong as in the central region




Genotype
MGI:3811822
cx7
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Myctm1Atp/Myc+
Genetic
Background
involves: 129P2/OlaHsd * 129S4/SvJaeSor * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
Myctm1Atp mutation (0 available); any Myc mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• as in Myctm1Atp heterozygotes




Genotype
MGI:5544754
cx8
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Ptch1tm1Mps/Ptch1+
Genetic
Background
involves: 129S1/Sv * 129S4/SvJaeSor * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
Ptch1tm1Mps mutation (2 available); any Ptch1 mutation (115 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• median survival of mutants that only develop medulloblastoma is 127 days

neoplasm
• 11.8% of mutants develop other tumors, including hemangiosarcomas, intestinal tumors, rhabdomyosarcomas, and lymphomas
• 59.7% of mutants develop medulloblastoma
• medulloblastomas are less differentiated and more invasive than medulloblastomas from single Ptch1 heterozygotes, sometimes penetrating the white matter and sometimes obliterating the normal contours of the cerebellar lobes

nervous system
• 59.7% of mutants develop medulloblastoma
• medulloblastomas are less differentiated and more invasive than medulloblastomas from single Ptch1 heterozygotes, sometimes penetrating the white matter and sometimes obliterating the normal contours of the cerebellar lobes
• fraction of mutants develop hydrocephalus unrelated to tumor formation
• 1 month old cerebella show preneoplastic lesions in the outer molecular layer where progenitors within the external germinal layer previously resided, suggesting that medulloblastomas arise from granule neuron progenitors

muscle

digestive/alimentary system

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
medulloblastoma DOID:0050902 OMIM:155255
J:205254




Genotype
MGI:3529771
cx9
Allelic
Composition
Cdkn1btm1Kin/Cdkn1b+
Irs2tm1Mfw/Irs2tm1Mfw
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Kin mutation (1 available); any Cdkn1b mutation (26 available)
Irs2tm1Mfw mutation (1 available); any Irs2 mutation (39 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• beta cell proliferation and the total number of beta cells are increased compared to Irs2 single homozygotes; however the size of individual beta cells is similar to Irs2 single homozygotes
• islet mass, but not islet density, is significantly increased compared to Irs2 single homozygotes

homeostasis/metabolism
• compound mutants have significantly elevated blood glucose levels at 18 weeks; however this elevation is slight compared to Irs2 single homozygotes
• fasting serum insulin levels are increased




Genotype
MGI:5811261
cx10
Allelic
Composition
Cdkn1btm1Ako/Cdkn1b+
KitW-v/KitW-v
Genetic
Background
involves: 129S1/Sv * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Ako mutation (0 available); any Cdkn1b mutation (26 available)
KitW-v mutation (9 available); any Kit mutation (177 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• sudden death is frequently seen

neoplasm
• mice exhibit enlarged ovarian tumors compared to single Kit homozygous mutants
• in aged mice, large ovarian tumors develop, infiltrate, and occupy the entire para- and meso-ovarian regions
• ovarian tubular adenomas are bilateral
• ovaries have a tumor phenotype that is more prominent than the tubular adenomas of the double homozygous ovaries
• papillary ovarian tubular adenomas from 8 month old mice have CK8+ epithelial cells infiltrating the entire ovary, the bursa and surrounding areas and resemble ovarian cancer or severe ovarian surface papillomatosis
• however, the epithelial lesions of ovarian tumors are benign
• tumor mass is largely epithelial and contains a minor 10% of less of granulosa cells

endocrine/exocrine glands
• mice exhibit enlarged ovarian tumors compared to single Kit homozygous mutants
• in aged mice, large ovarian tumors develop, infiltrate, and occupy the entire para- and meso-ovarian regions
• ovarian tubular adenomas are bilateral
• ovaries have a tumor phenotype that is more prominent than the tubular adenomas of the double homozygous ovaries
• papillary ovarian tubular adenomas from 8 month old mice have CK8+ epithelial cells infiltrating the entire ovary, the bursa and surrounding areas and resemble ovarian cancer or severe ovarian surface papillomatosis
• however, the epithelial lesions of ovarian tumors are benign
• tumor mass is largely epithelial and contains a minor 10% of less of granulosa cells
• ovarian epithelial cells show enhanced cell proliferation in culture compared to single homozygous Kit mutants

reproductive system
• mice exhibit enlarged ovarian tumors compared to single Kit homozygous mutants
• in aged mice, large ovarian tumors develop, infiltrate, and occupy the entire para- and meso-ovarian regions
• ovarian tubular adenomas are bilateral
• ovaries have a tumor phenotype that is more prominent than the tubular adenomas of the double homozygous ovaries
• papillary ovarian tubular adenomas from 8 month old mice have CK8+ epithelial cells infiltrating the entire ovary, the bursa and surrounding areas and resemble ovarian cancer or severe ovarian surface papillomatosis
• however, the epithelial lesions of ovarian tumors are benign
• tumor mass is largely epithelial and contains a minor 10% of less of granulosa cells
• ovarian epithelial cells show enhanced cell proliferation in culture compared to single homozygous Kit mutants

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
ovarian cancer DOID:2394 OMIM:167000
OMIM:607893
J:236161




Genotype
MGI:5581427
cx11
Allelic
Composition
Cdkn1btm1Mlf/Cdkn1b+
Tg(TG-TPR/NTRK1)#Rstn/0
Genetic
Background
involves: 129S4/SvJaeSor * C3H * C57BL/6 * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Mlf mutation (2 available); any Cdkn1b mutation (26 available)
Tg(TG-TPR/NTRK1)#Rstn mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• total number of papillary thyroid carcinomas that form is higher than in single Tg(TG-TPR/NTRK1)#Rstn transgenic mice
• however, a delay in onset of papillary thyroid carcinoma is seen compared to mice homozygous for Cdkn1btm1Mlf and transgenic for Tg(TG-TPR/NTRK1)#Rstn mice

endocrine/exocrine glands
• total number of papillary thyroid carcinomas that form is higher than in single Tg(TG-TPR/NTRK1)#Rstn transgenic mice
• however, a delay in onset of papillary thyroid carcinoma is seen compared to mice homozygous for Cdkn1btm1Mlf and transgenic for Tg(TG-TPR/NTRK1)#Rstn mice




Genotype
MGI:3529778
cx12
Allelic
Composition
Cdkn1btm1Kin/Cdkn1b+
Leprdb/Leprdb
Genetic
Background
involves: C57BL/6J * C57BLKS/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1btm1Kin mutation (1 available); any Cdkn1b mutation (26 available)
Leprdb mutation (18 available); any Lepr mutation (123 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological

endocrine/exocrine glands
• islet mass, but not islet density, is significantly increased compared to Lepr single homozygotes
• beta cell proliferation and the total number of beta cells are increased compared to Lepr single homozygotes; however the size of individual beta cells is similar to Lepr single homozygotes

growth/size/body

homeostasis/metabolism
• developed more slowly and to a reduced extent compared to Lepr single homozygotes





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last database update
01/20/2026
MGI 6.24
The Jackson Laboratory