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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Polr2atm1(cre/ERT2)Bbd
targeted mutation 1, Mariano Barbacid
MGI:3772332
Summary 31 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cn1
Mapk1tm1.1Hed/Mapk1tm1.1Hed
Mapk3tm1Gpg/Mapk3tm1Gpg
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129 MGI:5508241
cn2
Mapk14tm2Nbr/Mapk14tm2Nbr
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129 * C57BL/6 * CD-1 * SJL MGI:3716853
cn3
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
involves: 129P2/OlaHsd MGI:5508348
cn4
Braftm1Sva/Braftm1Sva
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ MGI:5508350
cn5
Braftm1Sva/Braftm1Sva
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ MGI:5508357
cn6
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ MGI:5508355
cn7
Braftm1Mmcm/Braf+
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129P2/OlaHsd * C57BL/6 * SJL MGI:3712024
cn8
Cdk6tm1Bbd/Cdk6tm1Bbd
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844194
cn9
Braftm1Sva/Braftm1Sva
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:5508351
cn10
Cdk2tm1Sgo/Cdk2tm1Sgo
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844195
cn11
Cdk4tm2.2Bbd/Cdk4tm2.2Bbd
Krastm1Bbd/Krastm1Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844188
cn12
Cdk2tm2Sgo/Cdk2tm2Sgo
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844189
cn13
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844190
cn14
Cdk4tm2.1Bbd/Cdk4tm2.1Bbd
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844191
cn15
Cdk4tm2.2Bbd/Cdk4tm2.1Bbd
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844192
cn16
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ MGI:4844193
cn17
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Rnf2tm1Mvi/Rnf2tm1Mvi
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * C57BL/10 * SJL MGI:3772193
cn18
Fntbtm1Bbd/Fntbtm1Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL MGI:3582819
cn19
Fntbtm1Bbd/Fntbtm1.1Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL MGI:3582821
cn20
Fntbtm1Bbd/Fntbtm1Bbd
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL MGI:3582832
cn21
Mapk14tm1Nbr/Mapk14tm2Nbr
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL MGI:3716854
cn22
Krastm1Bbd/Kras+
Mapk14tm1Nbr/Mapk14tm2Nbr
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL MGI:3716855
cn23
Krastm1Bbd/Kras+
Mapk14tm2Nbr/Mapk14+
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL MGI:3716857
cn24
Cdk2tm2Sgo/Cdk2tm2Sgo
Cdk4tm2.1Bbd/Cdk4tm2.1Bbd
Polr2atm1(cre/ERT2)Bbd/?
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * SJL MGI:3759577
cn25
E4f1tm1Pisc/E4f1tm1.1Llca
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129S4/SvJae * C57BL/6 * SJL MGI:4867861
cn26
Cdkn2atm1Rdp/Cdkn2atm1Rdp
E4f1tm1Pisc/E4f1tm1.1Llca
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129/Sv * 129S4/SvJae * C57BL/6 * SJL MGI:4867863
cn27
Cdc20tm1.1Mama/Cdc20tm1.2Mama
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: 129/Sv * BALB/cJ * C57BL/6 * CD-1 * SJL MGI:4887575
cn28
Map2k1tm1Chrn/Map2k1tm1Chrn
Map2k2tm1Chrn/Map2k2tm1Chrn
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
involves: 129/Sv * C57BL/6J * SJL MGI:5508246
cn29
Ebf1tm1.1Rug/Ebf1tm1.1Rug
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Tg(BCL2)#Wehi/0
involves: C57BL/6 * C57BL/6JWehi * SJL * SJL/JWehi MGI:5316372
cn30
Ebf1tm1.1Rug/Ebf1tm1.1Rug
Polr2atm1(cre/ERT2)Bbd/Polr2a+
involves: C57BL/6 * SJL MGI:5316370
cn31
Mastltm1.1Mama/Mastltm1.1Mama
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Not Specified MGI:5556128


Genotype
MGI:5508241
cn1
Allelic
Composition
Mapk1tm1.1Hed/Mapk1tm1.1Hed
Mapk3tm1Gpg/Mapk3tm1Gpg
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mapk1tm1.1Hed mutation (0 available); any Mapk1 mutation (40 available)
Mapk3tm1Gpg mutation (1 available); any Mapk3 mutation (26 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice fed a tamoxifen-containing diet show a deterioration of health and die within 3 weeks due to multiple organ failure




Genotype
MGI:3716853
cn2
Allelic
Composition
Mapk14tm2Nbr/Mapk14tm2Nbr
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129 * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mapk14tm2Nbr mutation (2 available); any Mapk14 mutation (41 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
respiratory system
• 2 weeks after 5-hydroxytamoxifen treatment, lungs show increased cellularity
• lungs show multicellular septa and reduction of the alveolar lumen as early as 2 weeks after 5-hydroxytamoxifen treatment, and is marked after 8 weeks, extending to 60% of the lungs
• after 5-hydroxytamoxifen treatment, there is an increase in alveolar type II cells compared to controls
• when cultured, isolated progenitor and stem cells (SP-C+, CC-10+ cells) when put under differentiation conditions do not have the capacity to form single positive cells; overexpression of C/EBP alpha in these cells restores the capacity to form SP-C+ cells

cellular
• 8 weeks after 5-hydroxytamoxifen treatment, lungs display hyperproliferation (~5-fold increased proliferation) compared to wild-type or heterozygous lungs




Genotype
MGI:5508348
cn3
Allelic
Composition
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
Raf1tm2Bacc mutation (0 available); any Raf1 mutation (114 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
normal phenotype
• 30 day old mice fed a tamoxifen diet for 3 months show normal weight and activity and no obvious anatomical defects




Genotype
MGI:5508350
cn4
Allelic
Composition
Braftm1Sva/Braftm1Sva
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
Genetic
Background
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Braftm1Sva mutation (1 available); any Braf mutation (58 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
Raf1tm2Bacc mutation (0 available); any Raf1 mutation (114 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
normal phenotype
• 30 day old mice fed a tamoxifen diet for 3 months are healthy and show normal weight and activity and no obvious anatomical defects




Genotype
MGI:5508357
cn5
Allelic
Composition
Braftm1Sva/Braftm1Sva
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
Genetic
Background
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Braftm1Sva mutation (1 available); any Braf mutation (58 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
Raf1tm2Bacc mutation (0 available); any Raf1 mutation (114 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• primary mouse embryonic fibroblasts exposed to 4OHT for 5 days to activate cre/ERT2 recombinase exhibit decreased proliferation that is similar to that in single Kras mutants without further additive effects




Genotype
MGI:5508355
cn6
Allelic
Composition
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Raf1tm2Bacc/Raf1tm2Bacc
Genetic
Background
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
Raf1tm2Bacc mutation (0 available); any Raf1 mutation (114 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• primary mouse embryonic fibroblasts exposed to 4OHT for 5 days to activate cre/ERT2 recombinase exhibit decreased proliferation compared to single Kras heterozygotes




Genotype
MGI:3712024
cn7
Allelic
Composition
Braftm1Mmcm/Braf+
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Braftm1Mmcm mutation (3 available); any Braf mutation (58 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• with induction of Cre expression from the transgene, multiple adenomatous tumors form in mouse lungs

respiratory system
• with induction of Cre expression from the transgene, multiple adenomatous tumors form in mouse lungs




Genotype
MGI:4844194
cn8
Allelic
Composition
Cdk6tm1Bbd/Cdk6tm1Bbd
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk6tm1Bbd mutation (1 available); any Cdk6 mutation (39 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• 50% of tamoxifen-treated mice survive at 40 weeks

neoplasm
• in mice treated with tamoxifen at weaning
• in mice treated with tamoxifen at weaning

respiratory system
• in mice treated with tamoxifen at weaning

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
lung cancer DOID:1324 OMIM:211980
OMIM:608935
OMIM:612571
OMIM:612593
OMIM:614210
J:161780




Genotype
MGI:5508351
cn9
Allelic
Composition
Braftm1Sva/Braftm1Sva
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Braftm1Sva mutation (1 available); any Braf mutation (58 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• primary mouse embryonic fibroblasts exposed to 4OHT for 5 days to activate cre/ERT2 recombinase exhibit decreased proliferation compared to single Kras heterozygotes




Genotype
MGI:4844195
cn10
Allelic
Composition
Cdk2tm1Sgo/Cdk2tm1Sgo
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk2tm1Sgo mutation (1 available); any Cdk2 mutation (17 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice treated tamoxifen at weaning exhibit an increase in lifespan of 8 weeks (42 weeks) compared with similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd littermates (34 weeks)

neoplasm
• tamoxifen-treated mice exhibit reduced tumor burden compared with similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice




Genotype
MGI:4844188
cn11
Allelic
Composition
Cdk4tm2.2Bbd/Cdk4tm2.2Bbd
Krastm1Bbd/Krastm1Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk4tm2.2Bbd mutation (0 available); any Cdk4 mutation (57 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tamoxifen-treated mice exhibit reduced tumor burden and tumor grade compared with similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice




Genotype
MGI:4844189
cn12
Allelic
Composition
Cdk2tm2Sgo/Cdk2tm2Sgo
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk2tm2Sgo mutation (1 available); any Cdk2 mutation (17 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Krastm2Bbd mutation (0 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• tamoxifen-treated mice exhibit an increase in lifespan compared with similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd littermates

neoplasm
• tamoxifen-treated mice exhibit reduced tumor burden and tumor grade compared with similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice




Genotype
MGI:4844190
cn13
Allelic
Composition
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Krastm2Bbd mutation (0 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• 50% survival for tamoxifen-treated mice is 25 weeks compared with 42 weeks for similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd littermates

neoplasm
• lung tumors in tamoxifen-treated mice are more aggressive than in similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice
• however, treatment with the Cdk4 inhibitor PD0332991 reduces tumor formation
• in mice treated with tamoxifen

cellular
• proliferation of lung cells in tamoxifen-treated mice exhibit 8- to 10-fold greater proliferation than in Cdk4tm2.1Bbd/Cdk4tm2.1Bbd Krastm1Bbd/Krastm2Bbd Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice

respiratory system
• lung tumors in tamoxifen-treated mice are more aggressive than in similarly treated Krastm1Bbd/Kras+ Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice
• however, treatment with the Cdk4 inhibitor PD0332991 reduces tumor formation
• in mice treated with tamoxifen

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
lung cancer DOID:1324 OMIM:211980
OMIM:608935
OMIM:612571
OMIM:612593
OMIM:614210
J:161780




Genotype
MGI:4844191
cn14
Allelic
Composition
Cdk4tm2.1Bbd/Cdk4tm2.1Bbd
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk4tm2.1Bbd mutation (1 available); any Cdk4 mutation (57 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Krastm2Bbd mutation (0 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• lung cells in tamoxifen-treated mice exhibit 8- to 10-fold reduction in proliferation and early senescence compared to in similarly treated Krastm1Bbd/Krastm2Bbd Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice
• tamoxifen-treated mice exhibit adenocarcinomas that are not as severe as in Krastm1Bbd/Krastm2Bbd Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice

cellular
• proliferation of lung cells in tamoxifen-treated mice exhibit 8- to 10-fold less proliferation than in similarly treated Krastm1Bbd/Krastm2Bbd Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice
• tamoxifen-treated mice exhibit increased cell replicative senescence in the lungs compared to in similarly treated Krastm1Bbd/Krastm2Bbd Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice




Genotype
MGI:4844192
cn15
Allelic
Composition
Cdk4tm2.2Bbd/Cdk4tm2.1Bbd
Krastm1Bbd/Krastm2Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk4tm2.1Bbd mutation (1 available); any Cdk4 mutation (57 available)
Cdk4tm2.2Bbd mutation (0 available); any Cdk4 mutation (57 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Krastm2Bbd mutation (0 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tamoxifen-treated mice infected with a flp-expressing adenovirus exhibit decreased proliferation and early senescence of tumor cells compared with tamoxifen and infected with GFP-expressing adenovirus
• tamoxifen-treated mice infected with a flp-expressing adenovirus exhibit reduced lesions compared to in mice treated with tamoxifen and infected with GFP-expressing adenovirus
• in tamoxifen-treated mice as in similarly treated Krastm1Bbd/Krastm2Bbd Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd mice

cellular
• tamoxifen-treated mice infected with a flp-expressing adenovirus exhibit early senescence of tumor cells compared with tamoxifen and infected with GFP-expressing adenovirus
• tamoxifen-treated mice infected with a flp-expressing adenovirus exhibit decreased proliferation of tumor cells compared with tamoxifen and infected with GFP-expressing adenovirus




Genotype
MGI:4844193
cn16
Allelic
Composition
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• the mean lifespan of mice treated tamoxifen is 34-42 weeks

neoplasm
• in mice treated with tamoxifen at weaning
• in mice treated with tamoxifen at weaning

respiratory system
• in mice treated with tamoxifen at weaning

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
lung cancer DOID:1324 OMIM:211980
OMIM:608935
OMIM:612571
OMIM:612593
OMIM:614210
J:161780




Genotype
MGI:3772193
cn17
Allelic
Composition
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Rnf2tm1Mvi/Rnf2tm1Mvi
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * C57BL/10 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
Rnf2tm1Mvi mutation (1 available); any Rnf2 mutation (36 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• when cells are exposed to tamoxifen ex vivo, the progenitor compartment is increased compared to unexposed cells
• when cells are exposed to tamoxifen ex vivo, the number of myeloid colony forming units is increased compared to unexposed cells
• when cells are exposed to tamoxifen ex vivo, the proliferation of myeloid precursor cells is increased compared to unexposed cells
• however, myeloid cell apoptosis rates and differentiation are normal
• when cells are exposed to tamoxifen ex vivo, fewer pre-B cells are present compared to unexposed cells

immune system
• when cells are exposed to tamoxifen ex vivo, fewer pre-B cells are present compared to unexposed cells




Genotype
MGI:3582819
cn18
Allelic
Composition
Fntbtm1Bbd/Fntbtm1Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fntbtm1Bbd mutation (1 available); any Fntb mutation (207 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• double homozygous MEFs treated with 4-hydroxy-tamoxifen to induce Cre mediated recombination proliferate less efficiently compared to untreated double homozygous MEFs

hematopoietic system
• about a 20% decrease in spleen size is seen in 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age
• removal of 0.8 ml of blood from 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age resulted in a smaller increase in spleen size and in the splenic erythroid compartment compared to controls

immune system
• about a 20% decrease in spleen size is seen in 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age

neoplasm
• treatment with 4-hydroxy-tamoxifen 2 weeks after treatment with 7,12 dimethyl-benzanthracene (DMBA) and 12-o-tetradecanoylphorbol-13-acetate (TPA) results in fewer and smaller papillomas compared to mice that were mot treated with 4-hydroxy-tamoxifen
• however, treatment with 4-hydroxy-tamoxifen for 20 weeks before treatment with DMBA and TPA had no effect on tumor incidence, size, or pathological appearance compared to mice that were not treated with 4-hydroxy-tamoxifen

homeostasis/metabolism
• treatment with 4-hydroxy-tamoxifen 2 weeks after treatment with 7,12 dimethyl-benzanthracene (DMBA) and 12-o-tetradecanoylphorbol-13-acetate (TPA) results in fewer and smaller papillomas compared to mice that were mot treated with 4-hydroxy-tamoxifen
• however, treatment with 4-hydroxy-tamoxifen for 20 weeks before treatment with DMBA and TPA had no effect on tumor incidence, size, or pathological appearance compared to mice that were not treated with 4-hydroxy-tamoxifen
• 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age take 12 days to fully heal compared to 9 days for control mice; however at 10 weeks of age no difference was seen in wound healing or liver regeneration after partial hepatectomy (not done in 6 month old mice)




Genotype
MGI:3582821
cn19
Allelic
Composition
Fntbtm1Bbd/Fntbtm1.1Bbd
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fntbtm1.1Bbd mutation (0 available); any Fntb mutation (207 available)
Fntbtm1Bbd mutation (1 available); any Fntb mutation (207 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• double homozygous MEFs treated with 4-hydroxy-tamoxifen to induce Cre mediated recombination proliferate less efficiently compared to untreated double homozygous MEFs

hematopoietic system
• about a 20% decrease in spleen size is seen in 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age
• removal of 0.8 ml of blood from 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age resulted in a smaller increase in spleen size and in the splenic erythroid compartment compared to controls

immune system
• about a 20% decrease in spleen size is seen in 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age

neoplasm
• treatment with 4-hydroxy-tamoxifen 2 weeks after treatment with 7,12 dimethyl-benzanthracene (DMBA) and 12-o-tetradecanoylphorbol-13-acetate (TPA) results in fewer and smaller papillomas compared to mice that were mot treated with 4-hydroxy-tamoxifen
• however, treatment with 4-hydroxy-tamoxifen for 20 weeks before treatment with DMBA and TPA had no effect on tumor incidence, size, or pathological appearance compared to mice that were not treated with 4-hydroxy-tamoxifen

homeostasis/metabolism
• treatment with 4-hydroxy-tamoxifen 2 weeks after treatment with 7,12 dimethyl-benzanthracene (DMBA) and 12-o-tetradecanoylphorbol-13-acetate (TPA) results in fewer and smaller papillomas compared to mice that were mot treated with 4-hydroxy-tamoxifen
• however, treatment with 4-hydroxy-tamoxifen for 20 weeks before treatment with DMBA and TPA had no effect on tumor incidence, size, or pathological appearance compared to mice that were not treated with 4-hydroxy-tamoxifen
• 6 month old double homozygous treated with 4-hydroxy-tamoxifen at 10 days of age take 12 days to fully heal compared to 9 days for control mice; however at 10 weeks of age no difference was seen in wound healing or liver regeneration after partial hepatectomy (not done in 6 month old mice)




Genotype
MGI:3582832
cn20
Allelic
Composition
Fntbtm1Bbd/Fntbtm1Bbd
Krastm1Bbd/Kras+
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fntbtm1Bbd mutation (1 available); any Fntb mutation (207 available)
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• after treatment with 4-hydroxy-tamoxifen for 24 weeks multiple lung adenomas develop by 7 months of age; however no difference in the latency, number, or size of tumors was seen compared to double mutants wild-type for Fntb
• after treatment with 4-hydroxy-tamoxifen for 24 weeks multiple lung adenocarcinomas develop by 7 months of age; however no difference in the latency, number, or size of tumors was seen compared to double mutants wild-type for Fntb

respiratory system
• after treatment with 4-hydroxy-tamoxifen for 24 weeks multiple lung adenomas develop by 7 months of age; however no difference in the latency, number, or size of tumors was seen compared to double mutants wild-type for Fntb
• after treatment with 4-hydroxy-tamoxifen for 24 weeks multiple lung adenocarcinomas develop by 7 months of age; however no difference in the latency, number, or size of tumors was seen compared to double mutants wild-type for Fntb




Genotype
MGI:3716854
cn21
Allelic
Composition
Mapk14tm1Nbr/Mapk14tm2Nbr
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mapk14tm1Nbr mutation (0 available); any Mapk14 mutation (41 available)
Mapk14tm2Nbr mutation (2 available); any Mapk14 mutation (41 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice die before week 32 due to increased lung cancer progression

respiratory system
• 20 weeks after treatment, lungs are increased in size
• 2 weeks after 5-hydroxytamoxifen treatment, small tumors are found in the lungs
• 20 weeks after treatment, lungs are oversized with 2-3 times as many tumors, many often >2mm in diameter, while lungs of Kras, Mapk14 heterozygotes have normal lungs with fewer, smaller tumors; tumors in Mapk14 homozygotes are more poorly differentiated and have higher mitotic indices
• at 26 weeks, total tumor number is slightly higher than in controls with much higher numbers of tumors larger than 2 mm in diameter and a higher ratio of lung mass to total mass
• tumors are detected 2 weeks after 5-hydroxytamoxifen treatment and after 4 weeks, clear signs of adenomas are present in most lungs compared to only a few small adenomas in lungs of treated Kras, Mapk14tm2Nbr/+ control mice
• adenocarcinomas are detected at 15 weeks but not in controls
• lung differentiation is abnormal with increased SP-C-positive cells

neoplasm
• mice also have tumors in the thymus and organs such as kidney and liver by 24 weeks after treatment whereas controls only have tumors in lungs and thymus
• 2 weeks after 5-hydroxytamoxifen treatment, small tumors are found in the lungs
• 20 weeks after treatment, lungs are oversized with 2-3 times as many tumors, many often >2mm in diameter, while lungs of Kras, Mapk14 heterozygotes have normal lungs with fewer, smaller tumors; tumors in Mapk14 homozygotes are more poorly differentiated and have higher mitotic indices
• at 26 weeks, total tumor number is slightly higher than in controls with much higher numbers of tumors larger than 2 mm in diameter and a higher ratio of lung mass to total mass
• tumors are detected 2 weeks after 5-hydroxytamoxifen treatment and after 4 weeks, clear signs of adenomas are present in most lungs compared to only a few small adenomas in lungs of treated Kras, Mapk14tm2Nbr/+ control mice
• adenocarcinomas are detected at 15 weeks but not in controls

growth/size/body
• 20 weeks after treatment, lungs are increased in size




Genotype
MGI:3716855
cn22
Allelic
Composition
Krastm1Bbd/Kras+
Mapk14tm1Nbr/Mapk14tm2Nbr
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Mapk14tm1Nbr mutation (0 available); any Mapk14 mutation (41 available)
Mapk14tm2Nbr mutation (2 available); any Mapk14 mutation (41 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice die before week 32 due to increased lung cancer progression

respiratory system
• 20 weeks after treatment, lungs are increased in size
• 2 weeks after 5-hydroxytamoxifen treatment, small tumors are found in the lungs
• 20 weeks after treatment, lungs are oversized with 2-3 times as many tumors, many often >2mm in diameter, while lungs of Kras, Mapk14 heterozygotes have normal lungs with fewer, smaller tumors; tumors in Mapk14 homozygotes are more poorly differentiated and have higher mitotic indices
• at 26 weeks, total tumor number is slightly higher than in controls with much higher numbers of tumors larger than 2 mm in diameter and a higher ratio of lung mass to total mass
• tumors are detected 2 weeks after 5-hydroxytamoxifen treatment and after 4 weeks, clear signs of adenomas are present in most lungs compared to only a few small adenomas in lungs of treated Kras, Mapk14tm2Nbr/+ control mice
• adenocarcinomas are detected at 15 weeks but not in controls
• lung differentiation is abnormal with increased SP-C-positive cells

neoplasm
• mice also have tumors in the thymus and organs such as kidney and liver by 24 weeks after treatment whereas controls only have tumors in lungs and thymus
• 2 weeks after 5-hydroxytamoxifen treatment, small tumors are found in the lungs
• 20 weeks after treatment, lungs are oversized with 2-3 times as many tumors, many often >2mm in diameter, while lungs of Kras, Mapk14 heterozygotes have normal lungs with fewer, smaller tumors; tumors in Mapk14 homozygotes are more poorly differentiated and have higher mitotic indices
• at 26 weeks, total tumor number is slightly higher than in controls with much higher numbers of tumors larger than 2 mm in diameter and a higher ratio of lung mass to total mass
• tumors are detected 2 weeks after 5-hydroxytamoxifen treatment and after 4 weeks, clear signs of adenomas are present in most lungs compared to only a few small adenomas in lungs of treated Kras, Mapk14tm2Nbr/+ control mice
• adenocarcinomas are detected at 15 weeks but not in controls

growth/size/body
• 20 weeks after treatment, lungs are increased in size




Genotype
MGI:3716857
cn23
Allelic
Composition
Krastm1Bbd/Kras+
Mapk14tm2Nbr/Mapk14+
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (76 available)
Mapk14tm2Nbr mutation (2 available); any Mapk14 mutation (41 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice live up to 40 weeks

neoplasm
• by 24 weeks, mice develop tumors in the thymus
• by 24 weeks, mice develop tumors in lungs
• at 4 weeks after 5-hydroxytamoxifen treatment, a few small adenomas are observed in some animals

respiratory system
• by 24 weeks, mice develop tumors in lungs
• at 4 weeks after 5-hydroxytamoxifen treatment, a few small adenomas are observed in some animals




Genotype
MGI:3759577
cn24
Allelic
Composition
Cdk2tm2Sgo/Cdk2tm2Sgo
Cdk4tm2.1Bbd/Cdk4tm2.1Bbd
Polr2atm1(cre/ERT2)Bbd/?
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdk2tm2Sgo mutation (1 available); any Cdk2 mutation (17 available)
Cdk4tm2.1Bbd mutation (1 available); any Cdk4 mutation (57 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• when 5 month old mice were treated with tamoxifen they exhibit reduced body size associated with the loss of the Cdk4 function

immune system
• when 5 month old mice were treated with tamoxifen they exhibit diabetes associated with the loss of the Cdk4 function

hematopoietic system
N
• adult hematopoiesis is normal following tamoxifen treatment at 5 months of age

liver/biliary system
N
• liver regeneration is normal following tamoxifen treatment at 5 months of age




Genotype
MGI:4867861
cn25
Allelic
Composition
E4f1tm1Pisc/E4f1tm1.1Llca
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129S4/SvJae * C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
E4f1tm1.1Llca mutation (2 available); any E4f1 mutation (38 available)
E4f1tm1Pisc mutation (1 available); any E4f1 mutation (38 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• after topical application of 4-hydroxytamoxifen

integument
• topical application of 4-hydroxytamoxifen to the unshaved tail results in complete alopecia by 6 weeks after application
• fewer hair follicle bulges are detected 4 - 6 weeks after topical application of 4-hydroxytamoxifen
• at 2 - 3 weeks after topical application of 4-hydroxytamoxifen the long term retaining cell region is expanded but by 6 weeks after application long term retaining cells appear to be lost
• broad disorganization of the interfollicular epithelium develops by 3 - 4 weeks after topical application of 4-hydroxytamoxifen
• hyperkeratosis is associated with loss of cellularity in the interfollicular epithelium
• develops by 3 - 4 weeks after topical application of 4-hydroxytamoxifen
• after topical application of 4-hydroxytamoxifen
• after topical application of 4-hydroxytamoxifen
• massive hyperplasia with increased cellularity in the interfollicular epithelium and the infundibulum in the first few weeks after topical application of 4-hydroxytamoxifen
• no abnormal cell death is seen in these lesions
• by 2 - 4 weeks after topical application of 4-hydroxytamoxifen, severe skin ulcerative lesions develop
• between 1 - 2 weeks after topical application of 4-hydroxytamoxifen, back skin is ruffled and wrinkled
• between 1 - 2 weeks after topical application of 4-hydroxytamoxifen, back skin is thickened
• increase in the proportion of proliferating epidermal cells in the first few weeks after topical application of 4-hydroxytamoxifen
• after 10 - 15 days in culture keratinocytes from 4-hydroxytamoxifen treated skin fail to develop typical holoclones (corresponding to long term clonal outgrowth of epidermal stem cells)




Genotype
MGI:4867863
cn26
Allelic
Composition
Cdkn2atm1Rdp/Cdkn2atm1Rdp
E4f1tm1Pisc/E4f1tm1.1Llca
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129/Sv * 129S4/SvJae * C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn2atm1Rdp mutation (6 available); any Cdkn2a mutation (62 available)
E4f1tm1.1Llca mutation (2 available); any E4f1 mutation (38 available)
E4f1tm1Pisc mutation (1 available); any E4f1 mutation (38 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
integument
• development of hyperkeratosis following 4-hydroxytamoxifen treatment is reduced and delayed compared to mutant mice wild-type for Cdkn2a
• development of hyperplasia following 4-hydroxytamoxifen treatment is reduced and delayed compared to mutant mice wild-type for Cdkn2a
• partial restoration in long term outgrowth of 4-hydroxytamoxifen exposed keratinocytes in culture compared to mutant mice wild-type for Cdkn2a




Genotype
MGI:4887575
cn27
Allelic
Composition
Cdc20tm1.1Mama/Cdc20tm1.2Mama
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: 129/Sv * BALB/cJ * C57BL/6 * CD-1 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdc20tm1.1Mama mutation (1 available); any Cdc20 mutation (30 available)
Cdc20tm1.2Mama mutation (0 available); any Cdc20 mutation (30 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• after 8 to 10 days on a tamoxifen diet
• however, survival is increased when older mice (1 year old) are treated with tamoxifen

cellular
• tamoxifen-treated mice exhibit widespread metaphase arrest in proliferative areas of the intestine and testis unlike in control mice
• topical treatment results in metaphase figures in the basal layer and in the hair follicle cells in depilated mice compared to in similarly treated control mice
• tamoxifen-treated mice exhibit reduced proliferation in the testis and spleen compared with control mice

neoplasm
• in a two-stage carcinogenesis protocol, tamoxifen-treated mice exhibit tumor arrest unlike similarly treated control mice
• in tamoxifen-treated mice

integument
• following topical application of tamoxifen, depilated mice exhibit impaired hair regeneration compared with similarly treated control mice
• topical treatment results in metaphase figures in the basal layer compared to in similarly treated control mice

digestive/alimentary system
• tamoxifen-treated mice exhibit loss of intestinal epithelium unlike in control mice

growth/size/body
• in tamoxifen-treated mice




Genotype
MGI:5508246
cn28
Allelic
Composition
Map2k1tm1Chrn/Map2k1tm1Chrn
Map2k2tm1Chrn/Map2k2tm1Chrn
Polr2atm1(cre/ERT2)Bbd/Polr2atm1(cre/ERT2)Bbd
Genetic
Background
involves: 129/Sv * C57BL/6J * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Map2k1tm1Chrn mutation (1 available); any Map2k1 mutation (92 available)
Map2k2tm1Chrn mutation (1 available); any Map2k2 mutation (35 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice fed a tamoxifen diet at 30 days of age show rapid deterioration of their health and die 2 weeks after starting the tamoxifen diet

digestive/alimentary system
• mice fed a tamoxifen diet exhibit severe alterations in the structure of intestinal and colonic tissue
• severe shortening of crypts in the colon of tamoxifen fed mice

endocrine/exocrine glands
• severe shortening of crypts in the colon of tamoxifen fed mice




Genotype
MGI:5316372
cn29
Allelic
Composition
Ebf1tm1.1Rug/Ebf1tm1.1Rug
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Tg(BCL2)#Wehi/0
Genetic
Background
involves: C57BL/6 * C57BL/6JWehi * SJL * SJL/JWehi
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ebf1tm1.1Rug mutation (0 available); any Ebf1 mutation (73 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
Tg(BCL2)#Wehi mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• fewer CD25-kappa+ immature B cells in tamoxifen-treated mice
• fewer CD25+kappa- pre-B cells in tamoxifen-treated mice

hematopoietic system
• fewer CD25-kappa+ immature B cells in tamoxifen-treated mice
• fewer CD25+kappa- pre-B cells in tamoxifen-treated mice




Genotype
MGI:5316370
cn30
Allelic
Composition
Ebf1tm1.1Rug/Ebf1tm1.1Rug
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
involves: C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ebf1tm1.1Rug mutation (0 available); any Ebf1 mutation (73 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
N
• tamoxifen-treated mice exhibit normal somatic hypermutation
• tamoxifen-treated pro-B cells exhibit reduced survival compared with wild-type mice that cannot be rescued by expression of Bcl2 or Foxo1 or transformation with A-MuLV
• stimulated B cells from tamoxifen-treated mice exhibit reduced survival compared with control cells
• however, expression of Myb or BAFF rescues B cell survival and expression of Bcl2l1 partially rescues B survival
• with cell cycle defects in tamoxifen-treated mice
• of B cells from tamoxifen-treated mice stimulated with LPS, CpG or anti-IgM
• tamoxifen-treated mice exhibit impaired germinal center formation and germinal center B cell proliferation compared with control mice
• however, B cell proliferation is rescued by transformation with A-MuLV
• in tamoxifen-treated mice
• in tamoxifen-treated mice
• of pre-B cells from tamoxifen-treated mice in vitro
• in tamoxifen-treated mice, less severe 12 days after immunization
• in tamoxifen-treated mice
• reduced frequency of B220intCD43- pre-B cells in tamoxifen-treated mice
• increased number of recirculating B220hiCD43- B cells in tamoxifen-treated mice
• in immunized tamoxifen-treated mice
• tamoxifen-treated mice exhibit impaired germinal center formation and germinal center B cell proliferation compared with control mice
• by a factor of 5 in tamoxifen treated mice
• by a factor of 3 in tamoxifen treated mice

cellular
• tamoxifen-treated pro-B cells exhibit reduced survival compared with wild-type mice that cannot be rescued by expression of Bcl2 or Foxo1 or transformation with A-MuLV
• stimulated B cells from tamoxifen-treated mice exhibit reduced survival compared with control cells
• however, expression of Myb or BAFF rescues B cell survival and expression of Bcl2l1 partially rescues B survival
• with cell cycle defects in tamoxifen-treated mice
• of B cells from tamoxifen-treated mice stimulated with LPS, CpG or anti-IgM
• tamoxifen-treated mice exhibit impaired germinal center formation and germinal center B cell proliferation compared with control mice
• however, B cell proliferation is rescued by transformation with A-MuLV

hematopoietic system
• tamoxifen-treated pro-B cells exhibit reduced survival compared with wild-type mice that cannot be rescued by expression of Bcl2 or Foxo1 or transformation with A-MuLV
• stimulated B cells from tamoxifen-treated mice exhibit reduced survival compared with control cells
• however, expression of Myb or BAFF rescues B cell survival and expression of Bcl2l1 partially rescues B survival
• with cell cycle defects in tamoxifen-treated mice
• of B cells from tamoxifen-treated mice stimulated with LPS, CpG or anti-IgM
• tamoxifen-treated mice exhibit impaired germinal center formation and germinal center B cell proliferation compared with control mice
• however, B cell proliferation is rescued by transformation with A-MuLV
• in tamoxifen-treated mice
• in tamoxifen-treated mice
• of pre-B cells from tamoxifen-treated mice in vitro
• in tamoxifen-treated mice, less severe 12 days after immunization
• in tamoxifen-treated mice
• reduced frequency of B220intCD43- pre-B cells in tamoxifen-treated mice
• increased number of recirculating B220hiCD43- B cells in tamoxifen-treated mice
• in immunized tamoxifen-treated mice
• tamoxifen-treated mice exhibit impaired germinal center formation and germinal center B cell proliferation compared with control mice
• by a factor of 5 in tamoxifen treated mice
• by a factor of 3 in tamoxifen treated mice




Genotype
MGI:5556128
cn31
Allelic
Composition
Mastltm1.1Mama/Mastltm1.1Mama
Polr2atm1(cre/ERT2)Bbd/Polr2a+
Genetic
Background
Not Specified
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mastltm1.1Mama mutation (0 available); any Mastl mutation (36 available)
Polr2atm1(cre/ERT2)Bbd mutation (3 available); any Polr2a mutation (92 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• following treatment with tamoxifen at E12.5, at E14.5 an increase in mitotic figures is seen in the neuroepithelium
• mitotic figures display an accumulation of prometaphases/metaphases

embryo
• following treatment with tamoxifen at E12.5, at E14.5 an increase in mitotic figures is seen in the neuroepithelium

nervous system
• following treatment with tamoxifen at E12.5, at E14.5 an increase in mitotic figures is seen in the neuroepithelium





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last database update
05/07/2024
MGI 6.23
The Jackson Laboratory