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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Fgatm1Jld
targeted mutation 1, Jay L Degen
MGI:2152976
Summary 8 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Fgatm1Jld/Fgatm1Jld B6.129P2-Fgatm1Jld MGI:3663779
hm2
Fgatm1Jld/Fgatm1Jld involves: 129P2/OlaHsd * C57BL/6J MGI:4834590
hm3
Fgatm1Jld/Fgatm1Jld involves: 129P2/OlaHsd * CF-1 MGI:3663778
cx4
Fgatm1Jld/Fgatm1Jld
Plgtm1Jld/Plgtm1Jld
B6.129P2-Fgatm1Jld Plgtm1Jld MGI:3690628
cx5
Fgatm1Jld/Fgatm1Jld
Plgtm1Jld/Plgtm1Jld
involves: 129P2/OlaHsd MGI:3690459
cx6
Fgatm1Jld/Fgatm1Jld
Thbdtm2Rdr/Thbdtm2Rdr
involves: 129P2/OlaHsd * 129S2/SvPas * C57BL/6 MGI:2653115
cx7
Fgatm1Jld/Fgatm1Jld
Vwftm1Wgr/Vwftm1Wgr
involves: 129P2/OlaHsd * 129S2/SvPas * C57BL/6J MGI:4834591
cx8
Fgatm1Jld/Fgatm1Jld
Plgtm1Jld/Plgtm1Jld
involves: 129P2/OlaHsd * Black Swiss * CF-1 MGI:3690622


Genotype
MGI:3663779
hm1
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Genetic
Background
B6.129P2-Fgatm1Jld
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• Background Sensitivity: survival characteristics essentially normal although blood clotting defect remains

homeostasis/metabolism
• platelet aggregation fails
• absence of fibrinogen A alpha chain results in secondary loss of B beta and gamma chains in circulation but not their synthesis in the liver
• no other abnormal blood parameters
• blood unable to clot

cardiovascular system
• bleeding into uterine cavity
• overt vaginal bleeding beginning about ten days into pregnancy
• overt bleeding in joints develops within 2 days of birth in many mice but rarely fatal
• overt intra-abdominal and periumbilical bleeding develops within 2 days of birth in many mice
• Background Sensitivity: does not particularly affect survival
• hepatic subcapsular hematomas developing into fibrotic scars
• normal at birth
• subcutaneous bleeding develops within 2 days of birth in many mice but rarely fatal

reproductive system
• bleeding into uterine cavity
• overt vaginal bleeding beginning about ten days into pregnancy
• overt vaginal bleeding beginning about ten days into pregnancy
• about 1/3 die by day 12 of pregnancy
• bleeding into uterine cavity occurs
• embryo development arrested around day 9 to 10 of pregnancy
• death of embryos around time when trophoblasts invade and disrupt maternal vasculature
• homozygous females fail to give birth to live offspring

nervous system
• increased numbers of myelinating fibers after crush injury of the sciatic nerve and less proliferation of Schwann cells
• by 35 days after nerve injury, recovery is comparable to controls

hematopoietic system
• platelet aggregation fails

skeleton
• overt bleeding in joints develops within 2 days of birth in many mice but rarely fatal

immune system
• absence of fibrinogen A alpha chain results in secondary loss of B beta and gamma chains in circulation but not their synthesis in the liver
• no other abnormal blood parameters

integument
• normal at birth
• subcutaneous bleeding develops within 2 days of birth in many mice but rarely fatal

liver/biliary system
• hepatic subcapsular hematomas developing into fibrotic scars




Genotype
MGI:4834590
hm2
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• thrombi that form in FeCl3-treated mice fail to resist sheer stress and eventually break off unlike in similarly treated wild-type mice
• FeCl3-induced thrombi occlude vessels away from the site of injury unlike in similarly treated wild-type mice




Genotype
MGI:3663778
hm3
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Genetic
Background
involves: 129P2/OlaHsd * CF-1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• Background Sensitivity: 90% survive to weaning
• Background Sensitivity: only half survive beyond 70 days of age with deaths usually due to intra-abdominal bleeding
• Background Sensitivity: survival curves for females slightly better than for males
• Background Sensitivity: risk of fatal bleeding greatest between 30 and 60 days
• Background Sensitivity: mice surviving beyond 2 months continue to survive well

homeostasis/metabolism
• absence of fibrinogen A alpha chain results in secondary loss of B beta and gamma chains in circulation but not their synthesis in the liver
• no other abnormal blood parameters
• exhibit distinctly larger deposits of dried blood at wound margins and scabs of wounds appear initially less stable than in controls and resumed bleeding is occasionally apparent
• platelet aggregation fails
• blood unable to clot
• exhibit distinctly larger deposits of dried blood at wound margins
• scabs of wounds appear initially less stable than in controls and resumed bleeding is occasionally apparent

cardiovascular system
• bleeding into uterine cavity
• overt vaginal bleeding beginning about ten days into pregnancy
• 11% (1 of 9) show squamous stomach hemorrhage
• overt bleeding in joints develops within 2 days of birth in many mice but rarely fatal
• overt intra-abdominal and periumbilical bleeding develops within 2 days of birth in many mice
• Background Sensitivity: results in death of mice that die between weaning and 70 days of age
• hepatic subcapsular hematomas developing into fibrotic scars
• normal at birth
• subcutaneous bleeding develops within 2 days of birth in many mice but rarely fatal

reproductive system
• bleeding into uterine cavity
• overt vaginal bleeding beginning about ten days into pregnancy
• overt vaginal bleeding beginning about ten days into pregnancy
• about 1/3 die by day 12 of pregnancy
• bleeding into uterine cavity occurs
• embryo development arrested around day 9 to 10 of pregnancy
• death of embryos around time when trophoblasts invade and disrupt maternal vasculature
• homozygous females fail to give birth to live offspring

nervous system
• increased numbers of myelinating fibers after crush injury of the sciatic nerve and less proliferation of Schwann cells
• by 35 days after nerve injury, recovery is comparable to controls

hematopoietic system
• platelet aggregation fails

skeleton
• overt bleeding in joints develops within 2 days of birth in many mice but rarely fatal

endocrine/exocrine glands
• 11% (1 of 9) show pancreatic cyst

liver/biliary system
• hepatic subcapsular hematomas developing into fibrotic scars
• 33% (3 of 9) show necrotic liver foci

immune system
• absence of fibrinogen A alpha chain results in secondary loss of B beta and gamma chains in circulation but not their synthesis in the liver
• no other abnormal blood parameters

digestive/alimentary system
• 11% (1 of 9) show squamous stomach hemorrhage

integument
• normal at birth
• subcutaneous bleeding develops within 2 days of birth in many mice but rarely fatal

growth/size/body
• 11% (1 of 9) show pancreatic cyst




Genotype
MGI:3690628
cx4
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Plgtm1Jld/Plgtm1Jld
Genetic
Background
B6.129P2-Fgatm1Jld Plgtm1Jld
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
Plgtm1Jld mutation (2 available); any Plg mutation (5 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
N
• do not develop conjunctivitis as is seen in single Plg homozygotes




Genotype
MGI:3690459
cx5
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Plgtm1Jld/Plgtm1Jld
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
Plgtm1Jld mutation (2 available); any Plg mutation (5 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• exhibit resistance to hippocampal neuronal death induced by kainate injection to a similar extent as seen in single Plg homozygotes, suggesting a non-fibrin substrate for plasmin




Genotype
MGI:2653115
cx6
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Thbdtm2Rdr/Thbdtm2Rdr
Genetic
Background
involves: 129P2/OlaHsd * 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
Thbdtm2Rdr mutation (0 available); any Thbd mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• unlike Thbdtm2Rdr homozygotes which are completely resorbed by E9.5, double homozygotes are recovered as late as E10.5

embryo
• double homozygotes exhibit embryonic growth arrest at E8.5
• inhibition of fibrinolysis with tranexamic acid has the same effect as complete elimination of fibrinogen and results in recovery of growth-arrested embryos at E9.5
• double homozygotes display a proliferation defect in trophoblast cells of the ectoplacental cone
• similarly, inhibition of fibrinolysis with tranexamic acid fails to augment proliferation of ectoplacental trophoblast cells
• in contrast, both the absence of fibrinogen and inhibition of fibrinolysis prevents DNA fragmentation in trophoblast giant cells, as detected by TUNEL assay




Genotype
MGI:4834591
cx7
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Vwftm1Wgr/Vwftm1Wgr
Genetic
Background
involves: 129P2/OlaHsd * 129S2/SvPas * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
Vwftm1Wgr mutation (1 available); any Vwf mutation (140 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• 23% of mice die before weaning

homeostasis/metabolism
• after FeCl3 treatment, platelet interaction with the vessel wall is delayed and platelet deposition is less than in similarly treated wild-type mice
• thrombi that form in FeCl3-treated mice fail to resist sheer stress and eventually break off unlike in similarly treated wild-type mice
• FeCl3-induced thrombi are more fragile than in similarly treated wild-type mice or Fgatm1Jld homozygotes
• FeCl3-treated mice exhibit shorter occlusion times compared with similarly treated Vwftm1Wgr homozygotes




Genotype
MGI:3690622
cx8
Allelic
Composition
Fgatm1Jld/Fgatm1Jld
Plgtm1Jld/Plgtm1Jld
Genetic
Background
involves: 129P2/OlaHsd * Black Swiss * CF-1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgatm1Jld mutation (0 available); any Fga mutation (44 available)
Plgtm1Jld mutation (2 available); any Plg mutation (5 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• show rescue from the early morbidity and premature death seen in single Plg homozygotes and show no signs of weight loss or wasting

homeostasis/metabolism
• shortly after birth, a small fraction of neonates show peritoneal bleeding from which they generally recover, indicating lack of clotting function
• exhibit distinctly larger deposits of dried blood at wound margins and scabs of wounds appear initially less stable than in controls and resumed bleeding is occasionally apparent
• exhibit distinctly larger deposits of dried blood at wound margins, however do not exhibit any of the wound healing defects seen in single Plg homozygotes
• scabs of wounds appear initially less stable than in controls and resume bleeding is occasionally apparent

liver/biliary system
• 6% (1 of 17) show hemorrhagic organized liver lesion
• 6% (1 of 17) show dystrophic calcification in liver
• 41% (7 of 17) show sporadic necrotic liver foci

immune system
N
• exhibit rescue of the various ulcerations and lesions seen in single Plg homozygotes

digestive/alimentary system
• 6% (1 of 17) show dystrophic calcification in duodenum





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last database update
12/10/2024
MGI 6.24
The Jackson Laboratory