This strain is homozygous for Pde6brd1 and Tlr4Lps-d.
Under conventional housing conditions, C3H/HeJBirLtJ mice develop spontaneous colitis. It should be noted that the phenotype of cecocolitis in this strain requires an interaction with an as yet undefined component of the enteric flora. Inflammation is present mainly in the cecum and right colon. Colitis develops early in life and resolves by three months of age. The colitis is characterized by acute and chronic inflammation, ulcerations, crypt abscesses, regenerative hyperplasia and submucosal scarring. A mild recurrence of the disease can occur after one year. Small lesions at the anorectal junction are common throughout life.
C3H/HeJ mice (at F204-208) were initially obtained from The Jackson Laboratory production facility. Mice were selectively bred for a high incidence of perianal ulceration, soft feces and positive Hemoccult test results. Over a period of a year, beginning in 1992, a pedigreed substrain was established starting with one severely affected female and one clinically normal male. Once the colony was established, affected mice were sibling mated and the pedigree with the highest incidence of disease was selected for further study. (Sundberg JP, et al., 1994) The new substrain was developed in the laboratory of Dr. Edward Birkenmeier and named C3H/HeJBir. The colony was transferred to Dr. Ed Leiter in the mid 1990's. The Jackson Laboratory Repository imported this strain from the research laboratory of Dr. Ed Leiter in 2006 at generation F52.
|Allele Name||defective lipopolysaccharide response|
|Allele Synonym(s)||lpsd; mutant TLR4; TlrLps-d; Tlr4-; Tlr4d; TLR4lps-def; TLR4d; TLR4-M; TLR4-Mu|
|Gene Symbol and Name||Tlr4, toll-like receptor 4|
|Strain of Origin||C3H/HeJ|
|General Note||C3H/HeJ mice carry this allele. Various combinations of Lps-associated traits have been followed in crosses between C3H/HeJ and other C3H substrains, and the traits have in all cases segregated together (J:30692, J:5557, J:5593, J:5938). Some of the traits show dominance of the Tlr4lps-n allele; others, including Tlr4Lps-d, show codominance. |
Genbank ID for this allele: AF095353
|Molecular Note||This allele corresponds to a mutation in the third exon of the gene. A C-to-A substitution at coding tide position 2135 (c.2135C>A) results in an amino acid substitution that replaces proline with histidine at position 712 (p.P712H).|
|Allele Name||retinal degeneration 1|
|Allele Synonym(s)||Pdebrd1; rd; rd1; rd-1; rodless retina|
|Gene Symbol and Name||Pde6b, phosphodiesterase 6B, cGMP, rod receptor, beta polypeptide|
|Strain of Origin||various|
|General Note||The following inbred strains are known to be homozygous for Pde6b |
|Molecular Note||Two mutations have been identified in rd1 mice. A murine leukimia virus (Xmv-28) insertion in reverse orientation in intron 1 is found in all mouse strains with the rd1 phenotype. Further, a nonsense mutation (C-to-A transversion) in codon 347 that results in a truncation eliminating more than half of the predicted encoded protein, including the catalytic domain, has been identified in all rd1 strains of mice. A specific degradation of mutant transcript during or after pre-mRNA splicing is suggested.|
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