Abstract:
:Four monoclonal antibodies (MA-5, MA-10, MA-20, and MA-51) and one polyclonal antibody (ARS-2) against human insulin receptor were used to immunoprecipitate the insulin receptor from several species which had been photolabeled with N epsilon B29-monoazido-benzoyl-[125I]iodoinsulin. All four monoclonal antibodies immunoprecipitated human insulin receptor from human placental membranes. MA-10 and MA-51, but not MA-5 or MA-20, immunoprecipitated insulin receptors from liver plasma membranes of rabbit, guinea pig, dog, cattle, pig, and chicken. None of the monoclonal antibodies immunoprecipitated insulin receptors of rat, mouse, hamster, or chinchilla. In contrast, all of the insulin receptors were immunoprecipitated by the polyclonal anti-insulin receptor antibody, ARS-2. MA-10 and MA-51 compared with [125I]iodoinsulin for binding to guinea pig and rabbit liver plasma membranes in a fashion similar to insulin, although less effectively. MA-51 also mimicked the action of insulin by stimulating lipogenesis and autophosphorylation of the insulin receptor beta subunit in isolated rabbit adipocytes. The results suggest that insulin receptors of mammals, other than rodent, share with human insulin receptor the same epitope(s) recognized by MA-10 and MA-51. Rodent insulin receptors, with the exception of guinea pig, are different. We speculate that the difference lies in the amino acid sequence 485-599 of the alpha subunit of the insulin receptor.
journal_name
Gen Comp Endocrinoljournal_title
General and comparative endocrinologyauthors
Tong ZQ,Jack E,Moule M,Goldfine ID,Yip CCdoi
10.1006/gcen.1994.1093subject
Has Abstractpub_date
1994-06-01 00:00:00pages
374-81issue
3eissn
0016-6480issn
1095-6840pii
S0016-6480(84)71093-8journal_volume
94pub_type
杂志文章abstract::This experiment was performed on two groups of male Japanese quail. One had been maintained in our laboratory as a closed colony (S-group), and the other had been obtained from a commercial source (R-group). Different responses of gonadal function were found between two groups following either testosterone treatment o...
journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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journal_title:General and comparative endocrinology
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