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- W2081036686 abstract "MHC class II heterozygotes form haplotype-mismatched heterodimers (combining α and β chains of different alleles). Transfected L-cells expressing AαdAβd or AαdAβb presented exogenous OVA(323–339) peptide to T cells with similar high efficiency, while AαbAβb was less efficient and AαbAβd was ineffective. In contrast, AαdAβb greatly exceeded AαdAβd in processing of intact OVA for presentation of OVA(323–339); AαbAβb was even less efficient and AαbAβd was ineffective. Of macrophages from C57BL/6 (H-2b), DBA/2 (H-2d) and B6D2F1 (H-2b×d)mice, B6D2F1 macrophages had highest I-A expression and efficiency for OVA processing or presentation of exogenous OVA(323–339) peptide. Blocking antibodies specific for I-A chains showed that OVA processing by B6D2F1 macrophages primarily involved haplotype-mismatched AαdAβb heterodimers, whereas AαdAβd and AαbAβb contributed more to presentation of exogenous OVA(323–339) peptide. OVA(323–339):I-A complexes were formed from OVA within 10 min with B6D2F1 macrophages but not until 20 min with C57BL/6 or DBA/2 macrophages, and OVA processing was more resistant to inhibition of late endocytic function by hypothermia (18°C) in B6D2F1 than C57BL/6 or DBA/2 macrophages. These results indicate that AαdAβb haplotype-mismatched heterodimers may contribute to antigen processing in early endocytic compartments." @default.
- W2081036686 created "2016-06-24" @default.
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- W2081036686 date "2002-10-01" @default.
- W2081036686 modified "2023-10-14" @default.
- W2081036686 title "Differences in antigen processing with haplotype-mismatched MHC class II heterodimers: AαdAβb heterodimers participate in early endosomal processing" @default.
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- W2081036686 doi "https://doi.org/10.1002/1521-4141(2002010)32:10<2726::aid-immu2726>3.0.co;2-8" @default.
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