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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Tg(Ttr-IGF1)1Sykr
transgene insertion 1, Shoshana Yakar
MGI:4455320
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cx1
Igf1tm1.1Dlr/Igf1tm1.1Dlr
Tg(Ttr-IGF1)1Sykr/0
FVB.Cg-Igf1tm1.1Dlr Tg(Ttr-IGF1)1Sykr MGI:4455335
tg2
Tg(Ttr-IGF1)1Sykr/0 FVB/N-Tg(Ttr-IGF1)1Sykr MGI:4455334


Genotype
MGI:4455335
cx1
Allelic
Composition
Igf1tm1.1Dlr/Igf1tm1.1Dlr
Tg(Ttr-IGF1)1Sykr/0
Genetic
Background
FVB.Cg-Igf1tm1.1Dlr Tg(Ttr-IGF1)1Sykr
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Igf1tm1.1Dlr mutation (0 available); any Igf1 mutation (29 available)
Tg(Ttr-IGF1)1Sykr mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• mice are born in normal Mendelian ratios

reproductive system
• mice have few mature graafian follicles
• mice exhibit immature endometrial epithelium compared with wild-type mice
• mice exhibit little glandular development compared with wild-type mice
• following hormone treatment, more eggs are released compared to in similarly treated wild-type mice
• irregular with prolonged diesterus and proesterus and shortened estrus
• breeding of female mice is largely unsuccessful compared with wild-type mice
• from female mice

homeostasis/metabolism
N
• mice exhibit normal fasting glucose and glucose clearance
• mice exhibit a tend towards reduced serum insulin levels compared with wild-type mice
• mice exhibit increased endocrine IGF-I levels compared with wild-type mice

growth/size/body
• at birth, mice are smaller than wild-type mice
• however, body weight is normalized by 2 weeks of age
• at 4 weeks of age, mice exhibit decreased body length compared with wild-type mice
• however, body length is normalized later on during growth and femur length is normal at 16 weeks of age

adipose tissue
• at 4 but not 8 weeks
• at 4 and 8 weeks but not 16 weeks

hematopoietic system

endocrine/exocrine glands
• mice exhibit increased ductal branching compared to in wild-type mice
• mice exhibit little glandular development compared with wild-type mice
• mice have few mature graafian follicles

immune system

integument
• mice exhibit increased ductal branching compared to in wild-type mice




Genotype
MGI:4455334
tg2
Allelic
Composition
Tg(Ttr-IGF1)1Sykr/0
Genetic
Background
FVB/N-Tg(Ttr-IGF1)1Sykr
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Tg(Ttr-IGF1)1Sykr mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
N
• mice exhibit normal fasting glucose and glucose clearance
• mice exhibit a tend towards reduced serum insulin levels compared with wild-type mice

adipose tissue
• at 4 ad 8 weeks in female mice
• at 4 and 8 weeks but not 16 weeks

reproductive system
• following hormone treatment, more eggs are released compared to in similarly treated wild-type mice

growth/size/body
• starting at 2 weeks and persistent throughout 16 weeks
• at 4 weeks of age
• 25% to 35%

endocrine/exocrine glands
• mice exhibit increased ductal branching compared to in wild-type mice

hematopoietic system

renal/urinary system

liver/biliary system
• 25% to 35%

immune system

integument
• mice exhibit increased ductal branching compared to in wild-type mice





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