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Phenotypes Associated with This Genotype
Genotype
MGI:2174692
Allelic
Composition
Pdgfratm2Sor/Pdgfratm2Sor
Genetic
Background
either: 129S4/SvJaeSor-Pdgfratm2Sor or (involves: 129S4/SvJaeSor * C57BL/6J)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pdgfratm2Sor mutation (0 available); any Pdgfra mutation (85 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• several homozygotes are dead at E14 while survivors appear distended and hemorrhagic
• most homozygotes die by E16; survivors show extensive bleeding in the head and along the vertebral column which appears enlarged

nervous system
• at E15.5, the mutant neural tube is dorsally thinned and lacks a roof plate
• homozygotes exhibit defects in cranial neural crest cell development
• in thoracic vertebrae, and to a lesser extent in cervical vertebrae, neural arches fail to form a convex structure, resulting in spina bifida
• at E8 and E9, most mutant embryos display a very wavy neural tube
• at E10, >50% of mutant embryos have a very wavy neural tube

embryo
• at E9, a few mutant embryos exhibit defective yolk sac vasculature
• at E8, five of 6 homozygotes have not turned; ~25% and 50% of mutant embryos remain unturned at E9 and E10, respectively
• at E8, one of 6 homozygotes is severely retarded at the headfold stage
• at E9, 25% of mutant embryos are smaller than wild-type embryos
• at E10, 25% of mutant embryos are very small while another 25% appear normal
• at E11, >50% of mutant embryos appear normal while the remainder are smaller and exhibit a wavy neural tube
• at E15.5, the mutant neural tube is dorsally thinned and lacks a roof plate
• homozygotes exhibit defects in cranial neural crest cell development
• in thoracic vertebrae, and to a lesser extent in cervical vertebrae, neural arches fail to form a convex structure, resulting in spina bifida
• at E8 and E9, most mutant embryos display a very wavy neural tube
• at E10, >50% of mutant embryos have a very wavy neural tube

cardiovascular system
• at E9, a few mutant embryos exhibit defective yolk sac vasculature
• at E10, 25% of mutant embryos show pericardial edema
• at E8, 2 of 6 mutant embryos show 2-4 subepidermal blebs flanking the neural tube
• at E9, a few mutant embryos show blood-filled blebs along the neural tube and head
• at E14, surviving mutant embryos display bleeding at various locations
• by E16, survivors exhibit extensive bleeding in the head and along the vertebral column
• despite bleeding, septation in the heart proceeds normally in at least some of E15 survivors

homeostasis/metabolism
• at E12, mutant embryos show blebbing in multiple locations and edema, which increases in severity by E13
• at E10, 25% of mutant embryos show pericardial edema
• at E15.5, mutant embryos exhibit distended, edematous skin

growth/size/body
• at E13-E15, the nasal bone fails to fuse in the midline
• at E12, mutant embryos show a cleft face
• at E8, one of 6 homozygotes is severely retarded at the headfold stage
• at E9, 25% of mutant embryos are smaller than wild-type embryos
• at E10, 25% of mutant embryos are very small while another 25% appear normal
• at E11, >50% of mutant embryos appear normal while the remainder are smaller and exhibit a wavy neural tube
• at E15.5, tissues such as the liver are bulging from the abdominal wall musculature

craniofacial
• at E15, the mutant basisphenoid and temporal bones display retarded ossification
• in contrast, the basioccipital bone and the maxilla appear normal
• at E13-E15, the frontal bone shows incomplete fusion towards the top of the skull
• at E13-E15, the parietal bone shows incomplete fusion towards the top of the skull
• at E13-E15, the nasal bone fails to fuse in the midline
• at E13-E15, the zygomatic bone is absent
• at E12, mutant embryos show a cleft face

skeleton
• at E15, the mutant basisphenoid and temporal bones display retarded ossification
• in contrast, the basioccipital bone and the maxilla appear normal
• at E13-E15, the frontal bone shows incomplete fusion towards the top of the skull
• at E13-E15, the parietal bone shows incomplete fusion towards the top of the skull
• at E13-E15, the nasal bone fails to fuse in the midline
• at E13-E15, the zygomatic bone is absent
• at E15.5, mutant embryos display a poorly developed acromion
• at E15.5, most ribs are attached to sternal bands; however, mutant sternal bands are shorter, highly abnormal and fail to fuse
• at E15.5, almost all homozygotes display asymmetric rib bifurcations of a variable extent; first evident at E13
• at E15.5, almost all homozygotes display asymmetric rib fusions of a variable extent; first evident at E1
• at E15.5, mutant thoracic vertebrae show absence of flexure
• sacral and caudal vertebrae are slightly retarded in development but otherwise normal
• at E15.5, mutant embryos display severe arching of the spinal column
• at E15.5, mutant cervical vertebrae show extensive structural changes and anterior-posterior fusions of the arches, involving up to 4 cervical vertebrae in some cases
• in addition, the apposition of vertebrae at the level of the vertebral bodies is abnormal and bilaterally asymmetric

muscle
• at E10.5, mutant embryos show disorganized myotomal development, esp. at the level of more rostral somites
• at E10.5, mutant myotomes at the level of 15-20 most rostral somites are elongated instead of round, and missing or fused with adjacent myotomes
• in contrast, myotomal morphology appears normal in caudal somites

cellular
• at E10, mutant embryos show increased apoptosis in the somites, cephalic region and branchial arches i.e. on pathways followed by migrating cranial NCCs

pigmentation
N
• at E10-E13, homozygotes display no pigmentation defects with normal melanocyte migration/number around the ear and tail

integument
• at E15.5, mutant embryos exhibit distended, edematous skin
• at E15.5, mutant embryos show a very thin epidermal layer, that is separated from any dermal layer when blebbed
• at E12, mutant embryos show large blebs on their heads accompanied by bleeding

respiratory system
• at E13-E15, the nasal bone fails to fuse in the midline


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
03/19/2024
MGI 6.23
The Jackson Laboratory