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Molecular cloning, expression and functional characterization of miniature swine CD86

Cited 2 time in Web of Science Cited 2 time in Scopus
Authors
Choi, Inho; Cho, Bumrae; Kim, Sung Dae; Park, Dongkyoo; Kim, Jae Young; Park, Chung-Gyu; Chung, Doo Hyun; Hwang, Woo Suk; Lee, Jung Sang; Ahn, Curie
Issue Date
2005-12-13
Publisher
Elsevier
Citation
Mol Immunol. 2006 Feb;43(5):480-6. Epub 2005 Mar 23.
Keywords
Amino Acid SequenceAnimalsAntigens, CDAntigens, CD86/*genetics/immunologyAntigens, Differentiation/immunologyCD4-Positive T-Lymphocytes/immunologyCOS CellsCercopithecus aethiopsCloning, MolecularHumansLymphocyte ActivationLymphocyte Culture Test, MixedMiceMolecular Sequence DataOrgan SpecificityRecombinant Fusion Proteins/immunologyReverse Transcriptase Polymerase Chain ReactionSequence AlignmentSequence Homology, Amino AcidSpecies SpecificitySpecific Pathogen-Free OrganismsSwineSwine, Miniature/*genetics/immunologyTransfection
Abstract
CD86 is one of the key molecules involved in the co-stimulation of T cells. The complete cDNA encoding CD86 molecule of miniature swine was cloned and analyzed. A comparison of two CD86 amino acid sequences of miniature swine and domestic swine showed only three amino acid differences suggesting that it is unlikely to affect the major structural features of the miniature swine CD86 (msCD86). In the expression study, constitutive expression of CD86 mRNA was detected in various tissues, and the aberrant expression of the transcriptional variant (putative soluble form) was noted. The cDNA and amino acid sequences for this variant were determined and compared with those for the human soluble CD86, which was previously reported to co-stimulate the T cells. Interestingly, an alignment of the two sequences revealed that 51 amino acids corresponding to the sequence for the boundary of the extracellular and intracellular domains including the transmembrane domain are deleted at almost an identical location within the full form of CD86 from both species. This suggests the possibility of a co-stimulatory function of the putative soluble msCD86. In order to determine if the cloned msCD86 molecules has co-stimulatory activity, the proliferative responses of the human CD4(+) T cells to the msCD86-transfected COS cells were measured in the presence of Con A. The results revealed that CD86/COS, but not the mock/COS, efficiently co-stimulated the proliferation of the Con A-stimulated CD4(+) T cells and this co-stimulatory effect was blocked by CTLA4-Ig. The structural and functional information on the miniature swine CD86 from this study will enable a further genetic manipulation of CD86 as a therapeutic strategy for controlling the xenogeneic T cell immune responses mediated by the CD86-CD28 signal pathway.
ISSN
0161-5890 (Print)
Language
English
URI
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=16337491

http://hdl.handle.net/10371/28360
DOI
https://doi.org/10.1016/j.molimm.2005.02.016
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College of Medicine/School of Medicine (의과대학/대학원)Internal Medicine (내과학전공)Journal Papers (저널논문_내과학전공)
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