Abstract:
:Fragments of cloned rat class I transplantation antigen genes were used to define the polymorphism detected between two lines of closely related BB rats. One line, BB-Hagedorn (BB/H), is prone to diabetes, and the other (BB control) is resistant. A cDNA probe representing part of the second extracellular domain of a class I antigen detected several DNA fragments and revealed a 2kb fragment present in resistant, but absent in diabetes-prone, BB/H rat DNA following digestion with BamH1. A 40 bp cDNA probe from the same domain showed a further simplified pattern in the DNA hybridization analysis. Only two fragments, 15 kb and 7 kb, were present in the resistant rats; the diabetes-prone BB/H rats lacked the 7 kb fragment. Several lines of evidence suggest that the gene contained in this 7 kb fragment may be deleted. Analysis of other diabetic BB rats and in the F2 generation of intercross offspring of F1 hybrid parents following crossbreeding between the resistant (BB-control) and diabetes-prone (BB/H) line demonstrate that the class I polymorphism was not linked directly to diabetes. Examination of various other BB lines and sublines indicate that these polymorphisms can be traced back to at least one other subline (Worcester) in the parent colony.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Kryspin-Sørensen I,Dyrberg T,Kastern Wdoi
10.1007/BF00452068subject
Has Abstractpub_date
1986-05-01 00:00:00pages
307-12issue
5eissn
0012-186Xissn
1432-0428journal_volume
29pub_type
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