About   Help   FAQ
Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Nrtntm1Jmi
targeted mutation 1, Jeffrey Milbrandt
MGI:2448936
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Nrtntm1Jmi/Nrtntm1Jmi involves: 129X1/SvJ * C57BL/6 MGI:3513818
cx2
Gdnftm1Rosl/Gdnf+
Nrtntm1Jmi/Nrtntm1Jmi
involves: 129S2/SvPas * 129X1/SvJ * C57BL/6 MGI:3588574
cx3
Gdnftm1Rosl/Gdnftm1Rosl
Nrtntm1Jmi/Nrtntm1Jmi
involves: 129S2/SvPas * 129X1/SvJ * C57BL/6 MGI:3588573


Genotype
MGI:3513818
hm1
Allelic
Composition
Nrtntm1Jmi/Nrtntm1Jmi
Genetic
Background
involves: 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrtntm1Jmi mutation (1 available); any Nrtn mutation (12 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• reduced blink reflex due to abnormal corneal sensation

endocrine/exocrine glands
• decreased mucosal thickening and folding in the secretory epithelium of the ventral prostate
• crusting drainage

immune system
• Il-1beta levels significantly increased by 4 months of age
• mice display phenotypic changes and ocular surface inflammation that mimic human keratoconjunctivitis sicca

muscle
• decrease in both longitudinal and circular muscle contraction of the intestine in response to electric field stimulation
• muscle strips from the gut with reduced spontaneous contractile activity
• contractile strength of stimulated gut muscles considerably reduced

reproductive system
• decreased mucosal thickening and folding in the secretory epithelium of the ventral prostate

vision/eye
• significantly reduced number of globlet cells in the bulbar and tarsal conjunctiva
• leukocytes found in epithelium
• thickened at 10 weeks from 5 layers to 8 with a basal cell phenotype
• eyes set more deeply in sockets
• drooping, thickened eyelids by 2 months of age
• eyelid thickening in most mice by 2 months of age
• permeability of corneal epithelium increased
• crusting drainage
• Il-1beta levels significantly increased by 4 months of age
• mice display phenotypic changes and ocular surface inflammation that mimic human keratoconjunctivitis sicca
• reduced aqueous tear production becoming significant at 8 weeks
• significantly delayed tear fluorescein clearance at >8 weeks

nervous system
• decreased small fiber density in the small intestine and colon (by 40% in duodenum) (J:53261)
• 35% fewer small bowel submucosal neurons, however the number of colonic submucosal neurons and colon and small bowel myenteric neurons is normal (J:82456)
• myenteric neuron size is reduced by 29% in the small bowel and 33% in the colon, however submucosal neuron size is normal (J:82456)
• density of acetylcholinesterase-stained neuronal fibers in the myenteric plexus is reduced by 32% in the small bowel and 22% in the colon (J:82456)
• reduced number of ciliary ganglion neurons but pupil function is normal
• otic ganglion cell size reduced but numbers of cells is normal
• severe reduction or lack of innervation to the lacrimal gland (J:53261)
• submandibular gland neurons smaller and fibers thinner (J:53261)
• parasympathetic innervation of glandular tissue in reproductive organs lost (J:89350)
• nerve fibers are almost completely absent in the lacrimal gland of adult mice, indicating reduced parasympathetic innervation to the lacrimal gland
• 70-95% reduction in substance P and 35-70% reduction in VIP release

digestive/alimentary system
• decrease in both longitudinal and circular muscle contraction of the intestine in response to electric field stimulation




Genotype
MGI:3588574
cx2
Allelic
Composition
Gdnftm1Rosl/Gdnf+
Nrtntm1Jmi/Nrtntm1Jmi
Genetic
Background
involves: 129S2/SvPas * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gdnftm1Rosl mutation (0 available); any Gdnf mutation (19 available)
Nrtntm1Jmi mutation (1 available); any Nrtn mutation (12 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
digestive/alimentary system
• decrease in both longitudinal and circular muscle contraction of the intestine in response to electric field stimulation

nervous system
• decrease in the number and cell size of small bowel and colon myenteric and submucosal neurons
• density of acetylcholinesterase-stained neuronal fibers in the myenteric plexus is reduced to a similar extent as in homozygous Nrtntm1Jmi mice
• 70-95% reduction in substance P and VIP release

muscle
• decrease in both longitudinal and circular muscle contraction of the intestine in response to electric field stimulation




Genotype
MGI:3588573
cx3
Allelic
Composition
Gdnftm1Rosl/Gdnftm1Rosl
Nrtntm1Jmi/Nrtntm1Jmi
Genetic
Background
involves: 129S2/SvPas * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gdnftm1Rosl mutation (0 available); any Gdnf mutation (19 available)
Nrtntm1Jmi mutation (1 available); any Nrtn mutation (12 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• severe intestinal aganglionosis, similar to that seen in single homozygous Gdnftm1Rosl mice





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)
Citing These Resources
Funding Information
Warranty Disclaimer, Privacy Notice, Licensing, & Copyright
Send questions and comments to User Support.
last database update
11/12/2024
MGI 6.24
The Jackson Laboratory