title: Absence of glaucoma in DBA/2J mice homozygous for wild-type versions of Gpnmb and Tyrp1.
abstract: BACKGROUND
  The glaucomas are a common but incompletely understood group of diseases. DBA/2J mice develop a pigment liberating iris disease that ultimately causes elevated intraocular pressure (IOP) and glaucoma. We have shown previously that mutations in two genes, Gpnmb and Tyrp1, initiate the iris disease. However, mechanisms involved in the subsequent IOP elevation and optic nerve degeneration remain unclear.
  
  
  RESULTS
  Here we present new mouse strains with Gpnmb and/or Tyrp1 genes of normal function and with a DBA/2J genetic background. These strains do not develop elevated IOP or glaucoma with age.
  
  
  CONCLUSIONS
  These strains provide much needed controls for studying pathogenic mechanisms of glaucoma using DBA/2J mice. Given the involvement of Gpnmb and/or Tyrp1 in areas such as immunology and tumor development and progression, these strains are also important in other research fields.
authors.affiliation: The Jackson Laboratory, Bar Harbor, Maine, USA. gareth.howell@jax.org <gareth.howell@jax.org>
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Howell
authors.forename: Richard T
authors.initials: RT
authors.lastname: Libby
authors.forename: Jeffrey K
authors.initials: JK
authors.lastname: Marchant
authors.forename: Lawriston A
authors.initials: LA
authors.lastname: Wilson
authors.forename: Ioan M
authors.initials: IM
authors.lastname: Cosma
authors.forename: Richard S
authors.initials: RS
authors.lastname: Smith
authors.forename: Michael G
authors.initials: MG
authors.lastname: Anderson
authors.forename: Simon W M
authors.initials: SW
authors.lastname: John
mesh_terms: D000818:Animals; D005136:Eye Proteins / Q000235:genetics*; D005838:Genotype; D005901:Glaucoma / Q000209:etiology / Q000235:genetics* / Q000473:pathology; D006720:Homozygote; D007429:Intraocular Pressure / Q000235:genetics*; D007499:Iris Diseases / Q000150:complications / Q000235:genetics / Q000473:pathology; D008562:Membrane Glycoproteins / Q000235:genetics*; D051379:Mice; D008811:Mice, Inbred DBA; D008817:Mice, Mutant Strains; D009900:Optic Nerve / Q000473:pathology; D010088:Oxidoreductases / Q000235:genetics*
chemical_list: D005136:Eye Proteins; C445671:Gpnmb protein, mouse; D008562:Membrane Glycoproteins; D010088:Oxidoreductases; C079621:Tyrp1 protein, mouse