About   Help   FAQ
Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Ascl1tm1And
targeted mutation 1, David J Anderson
MGI:1857470
Summary 16 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Ascl1tm1And/Ascl1tm1And involves: 129 MGI:3639765
hm2
Ascl1tm1And/Ascl1tm1And involves: 129S1/Sv * 129X1/SvJ MGI:2183210
hm3
Ascl1tm1And/Ascl1tm1And involves: 129S1/Sv * 129X1/SvJ * C57BL/6J MGI:2183209
ht4
Ascl1tm1And/Ascl1+ involves: 129 MGI:4941570
cn5
Ascl1tm1And/Ascl1tm1And
Gt(ROSA)26Sortm1(EYFP)Cos/Gt(ROSA)26Sor+
Tg(Ascl1-EGFP,-cre)1Jejo/0
involves: 129 * 129X1/SvJ * C57BL/6 * DBA MGI:4420909
cx6
Ascl1tm1And/Ascl1tm1And
Neurod1tm1Jle/Neurod1tm1Jle
either: (involves: 129S1/Sv * 129S4/SvJaeSor * 129X1/SvJ * ICR) or (involves: 129S2/SvPas * 129S4/SvJaeSor * ICR) MGI:4420920
cx7
Ascl1tm1And/Ascl1tm1And
Neurod4tm1Kag/Neurod4tm1Kag
either: (involves: 129S2/SvPas * C57BL/6 * CBA) or (involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CBA) MGI:3505584
cx8
Ascl1tm1And/Ascl1tm1And
Neurog2tm1Fgu/Neurog2tm1Fgu
involves: 129 * 129S1/Sv * 129X1/SvJ MGI:4420907
cx9
Ascl1tm1And/Ascl1tm1And
Gsx2tm1Ssp/Gsx2tm1Ssp
involves: 129 * 129S2/SvPas MGI:4412073
cx10
Ascl1tm1And/Ascl1tm1And
Neurog2tm2Fgu/Neurog2tm2Fgu
involves: 129 * C57BL/6J * CD-1b MGI:3622999
cx11
Ascl1tm1And/Ascl1tm1And
Neurog2tm4Fgu/Neurog2tm4Fgu
involves: 129 * MF1 MGI:4418975
cx12
Ascl1tm1And/Ascl1tm1And
Phox2atm1.1Sgu/Phox2a+
involves: 129P2/OlaHsd * C57BL/6 MGI:3845072
cx13
Ascl1tm1And/Ascl1tm1And
Neurog2tm1Fgu/Neurog2tm1Fgu
involves: 129S1/Sv * 129S4/SvJaeSor * 129X1/SvJ * ICR MGI:4420918
cx14
Ascl1tm1And/Ascl1tm1And
Neurod4tm1Kag/Neurod4tm1Kag
involves: 129/Sv * C57BL/6 * CBA * ICR MGI:4420919
cx15
Ascl1tm1And/Ascl1tm1And
Neurod1tm1Jle/Neurod1tm1Jle
Neurod4tm1Kag/Neurod4tm1Kag
involves: 129/Sv * C57BL/6 * CBA * ICR MGI:4420916
cx16
Ascl1tm1And/Ascl1tm1And
Neurod4tm1Kag/Neurod4tm1Kag
Neurog2tm1Fgu/Neurog2tm1Fgu
involves: 129/Sv * C57BL/6 * CBA * ICR MGI:4420915


Genotype
MGI:3639765
hm1
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Genetic
Background
involves: 129
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• at E11.5 and E12.5, numbers of TUNEL positive cells in the spinal cords of mutants are increased by factors of 3.2 and 9.7 respectively compared to controls, and apoptotic cells are seen primarily in the ventricular zone
• cultured precursor cells fail to produce neurons
• decreased proliferation in culture
• no CGRP-positive pulmonary neuroendocrine cells (including single and clustered PNECs) are detected in E13-E17 or neonatal lungs (J:64088)
• newborn mutants show complete lack of solitary airway neuroendocrine (NE) cells, as characterized by a panel of NE markers (J:113000)
• in contrast, enteric neurons and NE cells in the gut and pancreatic islets develop normally (J:113000)
• mutants show a defect in ventral telencephalic progenitors; progenitors are missing at E12.5
• in E10.5 embryos a dramatic increase in dI2 number is seen
• at E10.5 embryos show a 70% loss of dI3
• in E10.5 embryos a dramatic increase in dI4/6 interneuron number is seen
• at E10.5 embryos show a complete loss of dI5 neurons
• in E10.5 embryos a dramatic increase in dI4/6 interneuron number is seen
• V2 interneuron numbers are reduced to a similar extent as Ascl1tm1And

respiratory system
• newborn mutants show disruption of pulmonary neuroendocrine cell differentiation
• however, other bronchopulmonary cell types (e.g. Clara cells and type II alveolar cells) appear normal
• no clustered PNECs are detected in E13-E17 or neonatal lungs (J:64088)
• newborn mutants show complete lack of airway neuroepithelial bodies (normally clustering at airway branch points), as characterized by a panel of neuroendocrine markers (J:113000)

endocrine/exocrine glands
• no CGRP-positive pulmonary neuroendocrine cells (including single and clustered PNECs) are detected in E13-E17 or neonatal lungs (J:64088)
• newborn mutants show complete lack of solitary airway neuroendocrine (NE) cells, as characterized by a panel of NE markers (J:113000)
• in contrast, enteric neurons and NE cells in the gut and pancreatic islets develop normally (J:113000)

cellular
• at E11.5 and E12.5, numbers of TUNEL positive cells in the spinal cords of mutants are increased by factors of 3.2 and 9.7 respectively compared to controls, and apoptotic cells are seen primarily in the ventricular zone
• cultured precursor cells fail to produce neurons
• decreased proliferation in culture




Genotype
MGI:2183210
hm2
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• animals die within 24 hours of birth




Genotype
MGI:2183209
hm3
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• animals die within 24 hours of birth

pigmentation
• gray appearance in 25% of animals

behavior/neurological
• neonates did not feed; no milk in stomach after 6-12 hours

respiratory system
• absent olfactory neurons; very few remaining cells in epithelium; precursors do not form
• normal sustentacular cells
• difficulty in breathing, deep gasping movements apparent

taste/olfaction
• absent olfactory neurons; very few remaining cells in epithelium; precursors do not form
• normal sustentacular cells

nervous system
• absent olfactory neurons; very few remaining cells in epithelium; precursors do not form
• normal sustentacular cells
• delayed myenteric neuron development

craniofacial
• absent olfactory neurons; very few remaining cells in epithelium; precursors do not form
• normal sustentacular cells

integument
• gray appearance in 25% of animals

growth/size/body
• absent olfactory neurons; very few remaining cells in epithelium; precursors do not form
• normal sustentacular cells




Genotype
MGI:4941570
ht4
Allelic
Composition
Ascl1tm1And/Ascl1+
Genetic
Background
involves: 129
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• the number of CGRP-positive pulmonary neuroendocrine cells (including single and clustered PNECs) is significantly reduced in E13-E17 and neonatal heterozygous mutant lungs relative to that in wild-type lungs

respiratory system
• the number of clustered PNECs is significantly reduced in E13-E17 and neonatal heterozygous mutant lungs relative to that in wild-type lungs

endocrine/exocrine glands
• the number of CGRP-positive pulmonary neuroendocrine cells (including single and clustered PNECs) is significantly reduced in E13-E17 and neonatal heterozygous mutant lungs relative to that in wild-type lungs




Genotype
MGI:4420909
cn5
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Gt(ROSA)26Sortm1(EYFP)Cos/Gt(ROSA)26Sor+
Tg(Ascl1-EGFP,-cre)1Jejo/0
Genetic
Background
involves: 129 * 129X1/SvJ * C57BL/6 * DBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Gt(ROSA)26Sortm1(EYFP)Cos mutation (11 available); any Gt(ROSA)26Sor mutation (942 available)
Tg(Ascl1-EGFP,-cre)1Jejo mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• the precursors to dI3 and dI5 do not leave the ventricular zone at E10.5-E11.5 unlike in controls
• labeled cells do not appear to significantly contribute to the increase in dI2 and dI4 numbers




Genotype
MGI:4420920
cx6
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurod1tm1Jle/Neurod1tm1Jle
Genetic
Background
either: (involves: 129S1/Sv * 129S4/SvJaeSor * 129X1/SvJ * ICR) or (involves: 129S2/SvPas * 129S4/SvJaeSor * ICR)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurod1tm1Jle mutation (1 available); any Neurod1 mutation (29 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

nervous system
• decrease is not greater than that in Neurod1tm1Jle single homozygotes

vision/eye
N
• normal number of horizontal cells
• decrease is not greater than that in Neurod1tm1Jle single homozygotes




Genotype
MGI:3505584
cx7
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurod4tm1Kag/Neurod4tm1Kag
Genetic
Background
either: (involves: 129S2/SvPas * C57BL/6 * CBA) or (involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * CBA)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurod4tm1Kag mutation (1 available); any Neurod4 mutation (24 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• double homozygous mutant embryos die between E15.5 and E17.5

vision/eye
• retinal explant cultures from double homozygotes exhibit a significant increase in the number of Muller glia cells
• in addition, retinal explants from double homozygotes show ectopic generation of Muller cells, suggesting a fate switch from neurons to glial cells
• other cell types including rods and amacrine cells remain unaffected
• after 2 weeks of culture, retinal explants derived from E15.5 double homozygotes show a complete loss of retinal bipolar cells, without significant apoptosis

nervous system
• at E10.5, double homozygotes display loss of neurons and concomitant gliogenesis in the tectum, hindbrain and retina
• at E11.5, double homozygotes show a complete absence of neurons in the midbrain, and very few neurons in the two longitudinal columns of the hindbrain
• neuronal loss occurs in the absence of abnormal proliferation or apoptosis, suggesting a fate switch from neurons to glial cells
• the double mutant tectum consists of only the ventricular zone; the mantle layer is absent
• at E15.5, the ventricular cells adopt a glial fate instead of differentiating into neurons
• in double homozygotes, the tectum is significantly thinner and devoid of neurons
• retinal explant cultures from double homozygotes exhibit a significant increase in the number of Muller glia cells
• in addition, retinal explants from double homozygotes show ectopic generation of Muller cells, suggesting a fate switch from neurons to glial cells
• other cell types including rods and amacrine cells remain unaffected
• after 2 weeks of culture, retinal explants derived from E15.5 double homozygotes show a complete loss of retinal bipolar cells, without significant apoptosis

cellular
• at E10.5, double homozygotes display loss of neurons and concomitant gliogenesis in the tectum, hindbrain and retina
• at E11.5, double homozygotes show a complete absence of neurons in the midbrain, and very few neurons in the two longitudinal columns of the hindbrain
• neuronal loss occurs in the absence of abnormal proliferation or apoptosis, suggesting a fate switch from neurons to glial cells




Genotype
MGI:4420907
cx8
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurog2tm1Fgu/Neurog2tm1Fgu
Genetic
Background
involves: 129 * 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurog2tm1Fgu mutation (0 available); any Neurog2 mutation (18 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• in E10.5 embryos a dramatic increase in dI2 interneuron number is seen
• at E10.5 embryos show 70% loss of dI3
• at E10.5 embryos show apparent loss of dI4 neurons
• at E10.5 embryos show complete loss of dI5 neurons




Genotype
MGI:4412073
cx9
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Gsx2tm1Ssp/Gsx2tm1Ssp
Genetic
Background
involves: 129 * 129S2/SvPas
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Gsx2tm1Ssp mutation (0 available); any Gsx2 mutation (18 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• mice have fewer calretinin+ interneurons than in wild-type mice
• at E18.5, more cells stream laterally towards the ventrolateral telencephalon compared to in wild-type mice
• mice have fewer calretinin+ interneurons than in wild-type mice
• severe at embryonic stages as determined by marker expression
• as determined by marker expression

craniofacial
• mice have fewer calretinin+ interneurons than in wild-type mice

respiratory system
• mice have fewer calretinin+ interneurons than in wild-type mice

taste/olfaction
• mice have fewer calretinin+ interneurons than in wild-type mice

growth/size/body
• mice have fewer calretinin+ interneurons than in wild-type mice




Genotype
MGI:3622999
cx10
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurog2tm2Fgu/Neurog2tm2Fgu
Genetic
Background
involves: 129 * C57BL/6J * CD-1b
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurog2tm2Fgu mutation (0 available); any Neurog2 mutation (18 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• there is a reduced number ectopic ventral-type neurons with a lateral rather than dorsal location compared to Neurog2 nulls




Genotype
MGI:4418975
cx11
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurog2tm4Fgu/Neurog2tm4Fgu
Genetic
Background
involves: 129 * MF1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurog2tm4Fgu mutation (1 available); any Neurog2 mutation (18 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• at E18.5, a decrease in the number of dentate gyrus progenitors is seen similar to that seen in Neurog2 single homozygotes




Genotype
MGI:3845072
cx12
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Phox2atm1.1Sgu/Phox2a+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Phox2atm1.1Sgu mutation (0 available); any Phox2a mutation (10 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
N
• normal greater superficial petrosal nerve (GSPN) at E14.5

growth/size/body




Genotype
MGI:4420918
cx13
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurog2tm1Fgu/Neurog2tm1Fgu
Genetic
Background
involves: 129S1/Sv * 129S4/SvJaeSor * 129X1/SvJ * ICR
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurog2tm1Fgu mutation (0 available); any Neurog2 mutation (18 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

vision/eye
N
• normal number of horizontal cells




Genotype
MGI:4420919
cx14
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurod4tm1Kag/Neurod4tm1Kag
Genetic
Background
involves: 129/Sv * C57BL/6 * CBA * ICR
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurod4tm1Kag mutation (1 available); any Neurod4 mutation (24 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

vision/eye
N
• normal number of horizontal cells




Genotype
MGI:4420916
cx15
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurod1tm1Jle/Neurod1tm1Jle
Neurod4tm1Kag/Neurod4tm1Kag
Genetic
Background
involves: 129/Sv * C57BL/6 * CBA * ICR
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurod1tm1Jle mutation (1 available); any Neurod1 mutation (29 available)
Neurod4tm1Kag mutation (1 available); any Neurod4 mutation (24 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

nervous system
• increase in the number of Muller cells in the inner nuclear layer
• about 1/3 the number of photoreceptors
• very few bipolar cells in the inner nuclear layer

vision/eye
• cell death was increased slightly
• increase in the number of Muller cells in the inner nuclear layer
• very few bipolar cells in the inner nuclear layer
• about 1/3 the number of photoreceptors
• very few bipolar cells, increased Muller cells
• but almost normal numbers of amacrine and horizontal

cellular
• cell death was increased slightly




Genotype
MGI:4420915
cx16
Allelic
Composition
Ascl1tm1And/Ascl1tm1And
Neurod4tm1Kag/Neurod4tm1Kag
Neurog2tm1Fgu/Neurog2tm1Fgu
Genetic
Background
involves: 129/Sv * C57BL/6 * CBA * ICR
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ascl1tm1And mutation (1 available); any Ascl1 mutation (28 available)
Neurod4tm1Kag mutation (1 available); any Neurod4 mutation (24 available)
Neurog2tm1Fgu mutation (0 available); any Neurog2 mutation (18 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

nervous system
• increase in the number of Muller cells in the inner nuclear layer
• in the inner nuclear layer
• fewer bipolar cells in the inner nuclear layer
• fewer horizontal cells in the inner nuclear layer

vision/eye
• increase in the number of Muller cells in the inner nuclear layer
• in the inner nuclear layer
• fewer bipolar cells in the inner nuclear layer
• fewer horizontal cells in the inner nuclear layer
• fewer amacrine, horizontal and bipolar cells
• increase in Muller glial cells





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)
Citing These Resources
Funding Information
Warranty Disclaimer, Privacy Notice, Licensing, & Copyright
Send questions and comments to User Support.
last database update
04/23/2024
MGI 6.23
The Jackson Laboratory