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Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin
Selectins represent a new family of adhesion molecules, expressed by leukocytes and endothelial cells, that are involved in the regulation of leukocyte traffic. Here we have characterized a new monoclonal antibody (mAb) (EL-246) that recognizes both human leukocyte L-selectin (previously called LAM-...
Formato: | Texto |
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Lenguaje: | English |
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The Rockefeller University Press
1992
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2119248/ https://www.ncbi.nlm.nih.gov/pubmed/1375266 |
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collection | PubMed |
description | Selectins represent a new family of adhesion molecules, expressed by leukocytes and endothelial cells, that are involved in the regulation of leukocyte traffic. Here we have characterized a new monoclonal antibody (mAb) (EL-246) that recognizes both human leukocyte L-selectin (previously called LAM-1, LECAM-1, or gp90MEL-14) and endothelial cell E-selectin (previously called ELAM-1). EL-246 recognized a 110-kD protein expressed on cells transfected with E-selectin cDNA and stained many postcapillary venules in inflamed human tonsil. EL-246 also stained human peripheral blood leukocytes and showed identity with anti- L-selectin mAb in two-color flow cytometric analysis. The expression of the leukocyte EL-246 antigen was regulated in the same manner as L- selectin and EL-246 recognized anti-L-selectin mAb affinity-purified antigen in SDS/PAGE Western blot analysis. Further, L-selectin cDNA transfectants were specifically stained by EL-246. EL-246 blocked greater than 95% of lymphocyte adhesion to peripheral lymph node high endothelial venules and greater than 90% of neutrophil adhesion to E- selectin transfectants. In addition to the EL-246 epitope being expressed on two different human selectins, it was detected on L- selectin from a variety of different animals. Interestingly, domain mapping studies localized the EL-246 epitope to the short consensus repeat (SCR) domains of L-selectin. EL-246 is the first mAb that recognizes two different selectins and potentially defines a functional epitope encoded by the SCR domains. Inhibitors of selectin function targeted to this region would be expected to have the added advantage of simultaneously blocking the activity of two distinct adhesion proteins involved in inflammation. |
format | Text |
id | pubmed-2119248 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1992 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-21192482008-04-16 Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin J Exp Med Articles Selectins represent a new family of adhesion molecules, expressed by leukocytes and endothelial cells, that are involved in the regulation of leukocyte traffic. Here we have characterized a new monoclonal antibody (mAb) (EL-246) that recognizes both human leukocyte L-selectin (previously called LAM-1, LECAM-1, or gp90MEL-14) and endothelial cell E-selectin (previously called ELAM-1). EL-246 recognized a 110-kD protein expressed on cells transfected with E-selectin cDNA and stained many postcapillary venules in inflamed human tonsil. EL-246 also stained human peripheral blood leukocytes and showed identity with anti- L-selectin mAb in two-color flow cytometric analysis. The expression of the leukocyte EL-246 antigen was regulated in the same manner as L- selectin and EL-246 recognized anti-L-selectin mAb affinity-purified antigen in SDS/PAGE Western blot analysis. Further, L-selectin cDNA transfectants were specifically stained by EL-246. EL-246 blocked greater than 95% of lymphocyte adhesion to peripheral lymph node high endothelial venules and greater than 90% of neutrophil adhesion to E- selectin transfectants. In addition to the EL-246 epitope being expressed on two different human selectins, it was detected on L- selectin from a variety of different animals. Interestingly, domain mapping studies localized the EL-246 epitope to the short consensus repeat (SCR) domains of L-selectin. EL-246 is the first mAb that recognizes two different selectins and potentially defines a functional epitope encoded by the SCR domains. Inhibitors of selectin function targeted to this region would be expected to have the added advantage of simultaneously blocking the activity of two distinct adhesion proteins involved in inflammation. The Rockefeller University Press 1992-06-01 /pmc/articles/PMC2119248/ /pubmed/1375266 Text en This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
spellingShingle | Articles Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin |
title | Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin |
title_full | Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin |
title_fullStr | Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin |
title_full_unstemmed | Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin |
title_short | Characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of E-selectin and L-selectin |
title_sort | characterization of a functionally important and evolutionarily well- conserved epitope mapped to the short consensus repeats of e-selectin and l-selectin |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2119248/ https://www.ncbi.nlm.nih.gov/pubmed/1375266 |