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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Gpr161tm1.2Smuk
targeted mutation 1.2, Saikat Mukhopadhyay
MGI:6357710
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cn1
Gpr161tm1.2Smuk/Gpr161tm1.2Smuk
Tg(Nes-cre)1Kln/0
involves: C57BL/6 * C57BL/6J * SJL MGI:7341389
cn2
Gpr161tm1.2Smuk/Gpr161tm1.2Smuk
H2az2Tg(Wnt1-cre)11Rth/H2az2+
involves: C57BL/6J * CBA/J MGI:7341388


Genotype
MGI:7341389
cn1
Allelic
Composition
Gpr161tm1.2Smuk/Gpr161tm1.2Smuk
Tg(Nes-cre)1Kln/0
Genetic
Background
involves: C57BL/6 * C57BL/6J * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gpr161tm1.2Smuk mutation (0 available); any Gpr161 mutation (30 available)
Tg(Nes-cre)1Kln mutation (4 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• all fetuses exhibit protrusive tectal defects (tectal hypertrophy) at E13.5-E17.5

limbs/digits/tail
• at E13.5




Genotype
MGI:7341388
cn2
Allelic
Composition
Gpr161tm1.2Smuk/Gpr161tm1.2Smuk
H2az2Tg(Wnt1-cre)11Rth/H2az2+
Genetic
Background
involves: C57BL/6J * CBA/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gpr161tm1.2Smuk mutation (0 available); any Gpr161 mutation (30 available)
H2az2Tg(Wnt1-cre)11Rth mutation (2 available); any H2az2 mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• although fetuses survive to E18.5, no liveborn pups are recovered

growth/size/body
• significant increase in nasal bone volume at E17.5
• hard palatal shelves are not fused along the midline
• mild cleft palate at E15.5 and E17.5
• underdeveloped nasal septum at E13.5 and E15.5
• ~98% of fetuses show anotia/microtia at E13.5- E18.5
• ~98% of fetuses show anotia/microtia at E13.5- E18.5

nervous system
• protrusive tectal defects are secondary to increased proliferation of midbrain neural progenitor cells
• at E13.5, cell proliferation is significantly increased in the ventricular zone of the midbrain, suggesting that protrusive tectal defects are secondary to increased proliferation of midbrain neural progenitor cells
• Gli1 expression is significantly increased in the dorsal midbrain at E13.5
• Shh signaling activity and upstream Wnt signaling activity are both increased in midbrain tissues at E13.5
• fourth ventricle is enlarged at E13.5
• midbrain protrusion is initially observed at E13.5 and at E15.5
• dorsal midbrain is enlarged by E15.5
• overall midbrain tissues are expanded
• mesencephalic vesicle is enlarged at E13.5
• tectum is extended at E13.5
• ~98% of fetuses exhibit protrusive tectal defects (tectal hypertrophy) at E13.5-E18.5
• protrusive tectal defects are partly due to increased midbrain neural progenitor cell proliferation
• spinal edema at E15.5
• brain herniation along with protruded meninges is detected in the mesencephalic ventricles at E17.5
• ~69% of fetuses exhibit encephalocele at E17.5-E18.5

craniofacial
• severe orofacial defects at E13.5
• cranial neural crest cell (CNCC)-derived craniofacial bone formation is impaired
• significant loss of mineralized skull and facial bones at E17.5
• however, overall head size and formation of palatine, interparietal and occipital bones are unaffected
• frontal bones even fail to form
• significant reduction in frontal bone volume at E17.5
• significant reduction in parietal bone segments and volume at E17.5
• widened mandible at E17.5
• significant reduction in mandibular bone volume at E17.5
• underdeveloped mandible at E13.5 and E15.5
• irregular shapes of maxillary bone at E13.5 and E15.5, with widened maxilla at E17.5
• significant reduction in premaxilla volume at E17.5
• significant reduction in maxillary bone volume at E17.5
• shortened maxillary bone at E13.5 and E15.5
• significant increase in nasal bone volume at E17.5
• hard palatal shelves are not fused along the midline
• mild cleft palate at E15.5 and E17.5
• underdeveloped nasal septum at E13.5 and E15.5
• ~98% of fetuses show anotia/microtia at E13.5- E18.5
• ~98% of fetuses show anotia/microtia at E13.5- E18.5

skeleton
• cranial neural crest cell (CNCC)-derived craniofacial bone formation is impaired
• significant loss of mineralized skull and facial bones at E17.5
• however, overall head size and formation of palatine, interparietal and occipital bones are unaffected
• frontal bones even fail to form
• significant reduction in frontal bone volume at E17.5
• significant reduction in parietal bone segments and volume at E17.5
• widened mandible at E17.5
• significant reduction in mandibular bone volume at E17.5
• underdeveloped mandible at E13.5 and E15.5
• irregular shapes of maxillary bone at E13.5 and E15.5, with widened maxilla at E17.5
• significant reduction in premaxilla volume at E17.5
• significant reduction in maxillary bone volume at E17.5
• shortened maxillary bone at E13.5 and E15.5
• significant increase in nasal bone volume at E17.5
• severe defects in intramembranous bone formation, involving cranial vault and facial bones

vision/eye
• ~98% of fetuses show anophthalmia/microphthalmia at E13.5- E18.5
• ~98% of fetuses show anophthalmia/microphthalmia at E13.5- E18.5

hearing/vestibular/ear
• ~98% of fetuses show anotia/microtia at E13.5- E18.5
• ~98% of fetuses show anotia/microtia at E13.5- E18.5

digestive/alimentary system
• hard palatal shelves are not fused along the midline
• mild cleft palate at E15.5 and E17.5

cellular
• protrusive tectal defects are secondary to increased proliferation of midbrain neural progenitor cells

respiratory system
• significant increase in nasal bone volume at E17.5
• underdeveloped nasal septum at E13.5 and E15.5





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last database update
11/12/2024
MGI 6.24
The Jackson Laboratory