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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Hsd17b4tm1Baes
targeted mutation 1, Myriam Baes
MGI:2385822
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Hsd17b4tm1Baes/Hsd17b4tm1Baes involves: 129S1/Sv * 129X1/SvJ MGI:3606112
cx2
Ehhadhtm1Jkr/Ehhadhtm1Jkr
Hsd17b4tm1Baes/Hsd17b4tm1Baes
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ * C57BL/6J MGI:3606114


Genotype
MGI:3606112
hm1
Allelic
Composition
Hsd17b4tm1Baes/Hsd17b4tm1Baes
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hsd17b4tm1Baes mutation (2 available); any Hsd17b4 mutation (51 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice die before 6 months
• about 30% of most severely affected mice die between 2 and 12 days of age

reproductive system
• no germ cells present at 6-20 weeks old
• spermatogenesis severely compromised at 5 weeks of age
• some tubules continue to carry sperm at 5 weeks
• spermatids still present at 5 weeks of age
• become elongated at 7 weeks of age
• normal at 10 days an 3 weeks of age
• some lipid drops present
• lipid present on periphery of tubules at 5 weeks of age
• empty or filled with fibrous debris at 7 weeks
• multilayered structure of tubules lost
• only a few cell layers remaining by 12 and 16 weeks
• become severely atrophied at 6- 20 weeks of age
• lipid filled
• descend normally
• small size
• no sperm present
• 6-20 week old males mate but fail to sire offspring
• severely reduced fertility in males but not in females

nervous system
N
• no abnormalities are observed in cortical neuronal migration
• severe with earliest onset between 1 and 2 months and increasing severity with age
• more prominent in gray matter in all brain regions except for the cerebellum
• in the anterior and posterior horns of the spinal cord but not in the white matter tracts
• at 4 months
• loss of axonal integrity with swelling prior to demyelination

behavior/neurological
• mice become lethargic as their condition deteriorates between 4 and 6 months with hind paws often retracted to the body
• anxious phenotype beyond 12 weeks
• beyond 12 weeks
• severe beyond 12 weeks (J:201698)
• on a rotarod from 4 weeks, worsening with age
• beyond 12 weeks of age, mice exhibit frequent falls
• unsteady gait beyond 12 weeks

homeostasis/metabolism
• considerable decrease in oxidation of long chain fatty acids as well as branched chain fatty acids
• levels of C26 fatty acids increased 3-6X in livers and brains
• increased levels of branched fatty acids
• altered bile salt concentration
• accumulation of long chain fatty acids in the cortex

digestive/alimentary system
• more undigested material in feces of suckling mice than for littermate controls

growth/size/body
• body weight 50% lower than littermate controls at weaning
• noticeable from age 2 days onward
• growth improves after weaning but adults still are 30% lower in weight than controls

vision/eye

endocrine/exocrine glands
• normal at 10 days an 3 weeks of age
• some lipid drops present
• lipid present on periphery of tubules at 5 weeks of age
• empty or filled with fibrous debris at 7 weeks
• multilayered structure of tubules lost
• only a few cell layers remaining by 12 and 16 weeks
• become severely atrophied at 6- 20 weeks of age
• lipid filled
• descend normally
• small size

hematopoietic system
• severe with earliest onset between 1 and 2 months and increasing severity with age
• more prominent in gray matter in all brain regions except for the cerebellum
• in the anterior and posterior horns of the spinal cord but not in the white matter tracts

immune system
• severe with earliest onset between 1 and 2 months and increasing severity with age
• more prominent in gray matter in all brain regions except for the cerebellum
• in the anterior and posterior horns of the spinal cord but not in the white matter tracts

cellular
• no germ cells present at 6-20 weeks old
• spermatids still present at 5 weeks of age
• become elongated at 7 weeks of age

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
D-bifunctional protein deficiency DOID:0090031 OMIM:261515
J:62314 , J:99925




Genotype
MGI:3606114
cx2
Allelic
Composition
Ehhadhtm1Jkr/Ehhadhtm1Jkr
Hsd17b4tm1Baes/Hsd17b4tm1Baes
Genetic
Background
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ehhadhtm1Jkr mutation (0 available); any Ehhadh mutation (39 available)
Hsd17b4tm1Baes mutation (2 available); any Hsd17b4 mutation (51 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

Growth retardation and hypotonia in Ehhadhtm1Jkr/Ehhadhtm1Jkr Hsd17b4tm1Baes/Hsd17b4tm1Baes mice

mortality/aging
• about one third of homozygotes die within 24 hours of birth
• most died before weaning and the few surviving as much as 5 weeks were still suckling and not eating solid food
• some died in the first 3 days after birth with an inability to suckle

growth/size/body
• very striking growth retardation (J:89945)
• homozygotes are between 66 and 90% of normal weight (J:104835)

behavior/neurological
• some show difficulty suckling and usually die within 3 days of birth
• reduced activity in mice that die the first day

homeostasis/metabolism
• complete blockade of beta oxidation in liver peroxisomes
• about a 20% residual capacity to oxidize long chain fatty acids
• 7 fold increase in C26/C22 ratio in serum (J:89945)
• 3-4 fold increase in accumulation of long chain fatty acids in brain phospholipids (J:104835)
• altered bile salt concentration
• 3.5 fold decrease in docosahexaenoic acid in serum

liver/biliary system
• microvesicular fatty changes in the liver appear between 3 and 5 weeks of age

cellular
• reduction in numbers of peroxisomes

nervous system
N
• no abnormalities are observed in cortical neuronal migration

muscle
• mice that die the first day suffer from severe hypotonia

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
D-bifunctional protein deficiency DOID:0090031 OMIM:261515
J:89945 , J:99925





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