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Phenotype Image Detail
Caption A: Bony outgrowth or osteophyte formation. Mason's trichrome staining for collagen (blue) or safranin O staining for proteoglycans (red) was performed on knee joint sections prepared from a 3-month-old Errfi1tm1Gvw/Errfi1tm1Gvw mouse. Arrows indicate the abnormal outgrowing nodules that have abundant collagen and proteoglycan. Von Kossa staining of calcium deposition was performed on undecalcified knee joint sections prepared from a 5.5-month-old homozygous mutant mouse. Arrowheads indicate matrical calcium in the inner zone of the nodules. B: Degradation of articular cartilage. Arrows indicate rough joint surface and degraded articular cartilage in a 4-month-old mutant mouse knee joint stained with safranin O. C: Subchondral cyst formation. Two large cysts filled with or lacking fibroblast-like cells are observed beneath degraded articular cartilage in a 3-month-old mutant mouse knee joint as indicated by the arrowheads. D: Synovial hyperplasia. H&E knee joint sections were prepared from 2-month-old age-matched heterozygous and homozygous mutant mice. Compared with a thin layer of synovial lining in a heterozygous joint (normal), multilayers of synovial lining cells (Sy) are observed in a mutant mouse joint. E: Vascularization in the normally avascular joint region. Various size of blood vessels indicated by arrows are observed in a 4-month-old mutant knee joint, accompanied by newly repaired tissues.
Copyright This image is from Zhang YW, Proc Natl Acad Sci U S A 2005 Aug 16;102(33):11740-5. Copyright 2005 National Academy of Sciences, U.S.A. J:100927
Symbol Name
Errfi1tm1Gvw ERBB receptor feedback inhibitor 1; targeted mutation 1, George F Vande Woude
Allelic Composition Genetic Background
Errfi1tm1Gvw/Errfi1tm1Gvw Not Specified

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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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