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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Rettm2.1Cos
targeted mutation 2.1, Frank Costantini
MGI:2136896
Summary 6 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Rettm2.1Cos/Rettm2.1Cos involves: 129S1/Sv MGI:5489750
hm2
Rettm2.1Cos/Rettm2.1Cos involves: 129S1/Sv * C57BL/6J MGI:3846739
hm3
Rettm2.1Cos/Rettm2.1Cos involves: 129S1/Sv * C57BL/6J * FVB/N MGI:3583331
ht4
Rettm2.1Cos/Ret+ involves: 129S1/Sv * C57BL/6J * FVB/N MGI:3583335
ht5
Rettm1Cos/Rettm2.1Cos involves: 129S/SvEv * 129S1/Sv * C57BL/6J * FVB/N * MF1 MGI:3583336
cx6
Rettm2.1Cos/?
Tg(Th-MYCN)41Waw/0
involves: 129S1/Sv * BALB/c * C57BL/6J MGI:6196323


Genotype
MGI:5489750
hm1
Allelic
Composition
Rettm2.1Cos/Rettm2.1Cos
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rettm2.1Cos mutation (1 available); any Ret mutation (53 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
N
• mice exhibit normal thymopoiesis




Genotype
MGI:3846739
hm2
Allelic
Composition
Rettm2.1Cos/Rettm2.1Cos
Genetic
Background
involves: 129S1/Sv * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rettm2.1Cos mutation (1 available); any Ret mutation (53 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• in most mice, normal secretory cells are replaced with abnormal cells with higher density of nuclei and less volume of basophilic cytoplasm suggestive of pheochromocytoma

endocrine/exocrine glands
• in most mice, normal secretory cells are replaced with abnormal cells with higher density of nuclei and less volume of basophilic cytoplasm suggestive of pheochromocytoma




Genotype
MGI:3583331
hm3
Allelic
Composition
Rettm2.1Cos/Rettm2.1Cos
Genetic
Background
involves: 129S1/Sv * C57BL/6J * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rettm2.1Cos mutation (1 available); any Ret mutation (53 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• newborns have bilateral malformations of the adrenal glands
• mice show incomplete enclosure of the adrenal medulla
• mice show display nodular chromaffin cell hyperplasia as early as 4 months of age
• at 6-10 months of age, 26% display diffuse C-cell hyperplasia and 60% display more advanced nodular C-cell hyperplasia
• apparent as early as 5 months of age and in every mutant by 6 months of age

nervous system
• mice show display nodular chromaffin cell hyperplasia as early as 4 months of age
• develop ganglioneuromas of the adrenal medulla however do not develop ganglioneuromas of the intestinal tract or mucosa
• consistently display neuromatous enlargement of the sympathetic ganglia along the medial aspect of the adrenal glands and invasion of the sympathetic ganglia into the adrenal gland

neoplasm
• apparent as early as 5 months of age and in every mutant by 6 months of age
• develop ganglioneuromas of the adrenal medulla however do not develop ganglioneuromas of the intestinal tract or mucosa

reproductive system
• 83% of males could not impregnate wild-type females although they exhibited normal mounting behavior and had normal gonads and produced mature sperm




Genotype
MGI:3583335
ht4
Allelic
Composition
Rettm2.1Cos/Ret+
Genetic
Background
involves: 129S1/Sv * C57BL/6J * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rettm2.1Cos mutation (1 available); any Ret mutation (53 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• 16-17% display nodular chromaffin cell hyperplasia, rarely progressing to pheochromocytoma
• 31% of young and 41% of older mutants display diffuse C-cell hyperplasia and 14% have more advanced nodular C-cell hyperplasia

nervous system
• 16-17% display nodular chromaffin cell hyperplasia, rarely progressing to pheochromocytoma




Genotype
MGI:3583336
ht5
Allelic
Composition
Rettm1Cos/Rettm2.1Cos
Genetic
Background
involves: 129S/SvEv * 129S1/Sv * C57BL/6J * FVB/N * MF1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rettm1Cos mutation (2 available); any Ret mutation (53 available)
Rettm2.1Cos mutation (1 available); any Ret mutation (53 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
N
• do not exhibit ganglioneuromas, nodular chromaffin cell hyperplasia or pheochromocytomas

reproductive system
N
• males are fertile

neoplasm
N
• do not exhibit ganglioneuromas or pheochromocytomas




Genotype
MGI:6196323
cx6
Allelic
Composition
Rettm2.1Cos/?
Tg(Th-MYCN)41Waw/0
Genetic
Background
involves: 129S1/Sv * BALB/c * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rettm2.1Cos mutation (1 available); any Ret mutation (53 available)
Tg(Th-MYCN)41Waw mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice begin to die around 100 days of age, with 50% survival at 250 days of age

neoplasm
• mice develop stroma-poor neuroblastoma, with the majority of tumors showing signs of differentiation

nervous system
• mice develop stroma-poor neuroblastoma, with the majority of tumors showing signs of differentiation

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
neuroblastoma DOID:769 J:261033





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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
04/30/2024
MGI 6.23
The Jackson Laboratory