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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Fgfr1tm1Led
targeted mutation 1, Philip Leder
MGI:2150650
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Fgfr1tm1Led/Fgfr1tm1Led involves: 129S4/SvJae * NIH Black Swiss MGI:2174904


Genotype
MGI:2174904
hm1
Allelic
Composition
Fgfr1tm1Led/Fgfr1tm1Led
Genetic
Background
involves: 129S4/SvJae * NIH Black Swiss
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgfr1tm1Led mutation (0 available); any Fgfr1 mutation (221 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• at later developmental stages up to E12.5, abnormal embryos comprised approximately one quarter of the total number
• by E6.5, 15% of deciduas contained abnormal or partially resorbed embryos

embryo
• some embryos at E9.5 exhibit little or no axial organization and resemble a flattened disk
• little mesodermal differentiation was noted in embryos developing to E8.5
• mesodermally-derived axial structures such as a neural tube, somites and limb buds were not seen at later stages
• at the anterior pole, some embryos exhibited head fold structures, although they were abnormal in size and morphology; occasionally otocysts and branchial arches were seen
• at E9.5, many embryos exhibited little posterior extension of the embryonic axis, although a few did develop abnormal trunk and tail regions at later stages
• developmental retardation was noted at all stages
• embryos appeared smaller in vivo, and cultured blastocysts exhibit smaller blastocyst outgrowths
• at E7.5, embryos exhibited a small egg cylinder, with an unusual invagination at the circumferential constriction the divides the egg cylinder between the embryonic and extraembryonic ectoderm
• in embryos developing to E8.5, a thickened primitive streak with limited growth of extraembryonic mesoderm was seen
• some mutant embryos at E7.5 had an extraembryonic portion that was larger than the embryonic portion, resulting in a comma-like shape
• at E6.5, a small proamniotic cavity was noted
• abnormal surface, described as bumpy and ruffled
• the visceral yolk sac of embryos developing to E9.5 was large compared to the embryonic portion, but small compared to wild-type controls

growth/size/body
• developmental retardation was noted at all stages
• embryos appeared smaller in vivo, and cultured blastocysts exhibit smaller blastocyst outgrowths

limbs/digits/tail

nervous system

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Pfeiffer syndrome DOID:14705 OMIM:101600
J:22118





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last database update
03/12/2024
MGI 6.23
The Jackson Laboratory