Animal Production Program

  01D35 DBA/2N
(Dilute brown, dba, dba-2, dba subline 212, DBA.2JN)

Origin: To N 1951 from Mider at F34. See DBA/1N for origin of DBA/1 and DBA/2 strains, but to Mider in 1938.
Genetics:

a, b, d, C
Non-agouti, dulite brown
Genes:

Car-2b, Ce-2a, Es-1b, Es-3c, Es-10b, Gpd-1b, Gpi-1a, Gusb, Hbag, Hbbd, Idh-1b, Lva, Mod-1a, Mup-1a, Pep-3b, Pgm-1b, Trfb
Hc0, H-2Dd, H-2Kd, Lyb-2a, Lyt-1a, Lyt-2a, Lyt-3b, Thy-1b, Tlac.

   
Diseases
    Neoplastic (Spontaneous):
 
  • Mammary tumors in old females. (680)
   
    Neoplastic (Induced):
 
  • 3-Methylcholanthrene induced brain tumors in only 3%. (404)
  • In comparison with other inbred strains, DBA/2 is susceptible to Bittner, Friend S and Friend B viruses, relatively susceptible to Gross virus, and resistant to Vaccinia virus. (370)
  • Benzo(a)pyrene induced more fibrosarcomas in C3H mice than in DBA/2 mice, and simultaneous application of 7, 8-benzoflavone caused a greater increase in tumor incidence in C3H mice; however, 1, 1, 1-trichloropropene-2, 3-oxide plus benzo(a)pyrene induced a higher incidence of fibrosarcomas in DBA/2 mice. (781)
   
    Non-Neoplastic (Spontaneous):
 
  • Intestinal volvulus in a small percentage. (140)
  • Over 50% of males and females had dystrophic cardiac calcinosis in the myocardium and/or epicardium. (160)
   
    Non-Neoplastic (Induced):
 
  • Relatively resistant to infection by Plasmodium berghei. (492)
  • Susceptible to infection with Leishmania tropica, but no clinical signs of disease. (063)
   
Other Characteristics
    Immunologic:
 
  • High interferon induction by Newcastle disease virus. (696)
  • Antibody response to single-stranded DNA is low and response is controlled by an autosomal dominant gene regulated by sex hormones. (571)
   
    Biochemical:
 
  • Aryl hydrocarbon hydroxylase increased only 20% by 3-methylcholanthrene. The “nonresponsive” Ahd allele is present. (404,403)
  • Gamma-aminobutyric acid binding was lower in DBA/2 than C57BL/6 cerebral cortex, hippocampus, striatum, and diencephalons. (739)
  • Liver alcohol dehydrogenase activity is slightly lower, and liver alhehyde dehydrogenase much lower than C57BL/6. (299)
  • Morphine decreased acetylcholine turnover rate in cerebral cortex. (561)
 
    Physiologic:
 
  • Low plasma resting steroid levels, peak only briefly after stress. (398)
 
    Behavioral:
 
  • Quickly develops an aversion to ethanol. (299)
   
    Misc:
 
  • Susceptible to audiogenic seizures; susceptibility begins at 12-17 days, peaks at 21 days, then gradually declines with age. (646)
  • Antithyroid drugs or radiothyroidectomy suppresses susceptibility to audiogenic seizures. Suitable as a model for testing anticonvulsants. (647, 421)
  • Oral benzo(a)pyrene killed mice in 4 weeks due to pancytopenia. (737)
  • 3-Methylcholanthrene was less toxic to DBA/2N primordial oocytes than to C57BL/6N oocytes. (447)
  • More sensitive to toxic effects of chloroform than C57BL/6. (097)
  • More sensitive to analgesic action of morphine than C57BL/6. (561)