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High levels of a major histocompatibility complex II-self peptide complex on dendritic cells from the T cell areas of lymph nodes.

Inaba K, Pack M, Inaba M, Sakuta H, Isdell F, Steinman RM - J. Exp. Med. (1997)

Bottom Line: Shortman. 1992.Therefore DCs within the T cell areas can be isolated.Because they present very high levels of self peptides, these DCs should be considered in the regulation of self reactivity in the periphery.

View Article: PubMed Central - PubMed

Affiliation: Kyoto University, Kitashirakawa-Oiusake-cho, Kyoto 606-01, Japan.

ABSTRACT
T lymphocytes recirculate continually through the T cell areas of peripheral lymph nodes. During each passage, the T cells survey the surface of large dendritic cells (DCs), also known as interdigitating cells. However, these DCs have been difficult to release from the lymph node. By emphasizing the use of calcium-free media, as shown by Vremec et al. (Vremec, D., M. Zorbas, R. Scollay, D.J. Saunders, C.F. Ardavin, L. Wu, and K. Shortman. 1992. J. Exp. Med. 176:47-58.), we have been able to release and enrich DCs from the T cell areas. The DCs express the CD11c leukocyte integrin, the DEC-205 multilectin receptor for antigen presentation, the intracellular granule antigens which are recognized by monoclonal antibodies M342, 2A1, and MIDC-8, very high levels of MHC I and MHC II, and abundant accessory molecules such as CD40, CD54, and CD86. When examined with the Y-Ae monoclonal which recognizes complexes formed between I-Ab and a peptide derived from I-Ealpha, the T cell area DCs expressed the highest levels. The enriched DCs also stimulated a T-T hybridoma specific for this MHC II-peptide complex, and the hybridoma underwent apoptosis. Therefore DCs within the T cell areas can be isolated. Because they present very high levels of self peptides, these DCs should be considered in the regulation of self reactivity in the periphery.

Show MeSH
DCs which have not been exposed to B cells express high levels of the Y–Ae, MHC–peptide complex. DCs were isolated from cultures  which lack B cells, epidermal cells (A) and bone marrow stimulated with GM-CSF (B). In each instance, the DCs have high levels of CD86 and MHC II  or MHC II–self peptide complexes.
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Figure 7: DCs which have not been exposed to B cells express high levels of the Y–Ae, MHC–peptide complex. DCs were isolated from cultures which lack B cells, epidermal cells (A) and bone marrow stimulated with GM-CSF (B). In each instance, the DCs have high levels of CD86 and MHC II or MHC II–self peptide complexes.

Mentions: To rule out acquisition of I-Eα peptide from B cells, we stained DC suspensions which lacked B cells, i.e., DCs from epidermis (9) and from bone marrow–progenitors (8). Both epidermal (Fig. 7 A) and bone marrow–derived (Fig. 7 B) DCs expressed high levels of Y-Ae and the CD86 costimulator. Again only the cells from the appropriate mouse strain (C57BL/6 × DBA/2 F1 vs. C57BL/6) expressed the Y-Ae epitope.


High levels of a major histocompatibility complex II-self peptide complex on dendritic cells from the T cell areas of lymph nodes.

Inaba K, Pack M, Inaba M, Sakuta H, Isdell F, Steinman RM - J. Exp. Med. (1997)

DCs which have not been exposed to B cells express high levels of the Y–Ae, MHC–peptide complex. DCs were isolated from cultures  which lack B cells, epidermal cells (A) and bone marrow stimulated with GM-CSF (B). In each instance, the DCs have high levels of CD86 and MHC II  or MHC II–self peptide complexes.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2199017&req=5

Figure 7: DCs which have not been exposed to B cells express high levels of the Y–Ae, MHC–peptide complex. DCs were isolated from cultures which lack B cells, epidermal cells (A) and bone marrow stimulated with GM-CSF (B). In each instance, the DCs have high levels of CD86 and MHC II or MHC II–self peptide complexes.
Mentions: To rule out acquisition of I-Eα peptide from B cells, we stained DC suspensions which lacked B cells, i.e., DCs from epidermis (9) and from bone marrow–progenitors (8). Both epidermal (Fig. 7 A) and bone marrow–derived (Fig. 7 B) DCs expressed high levels of Y-Ae and the CD86 costimulator. Again only the cells from the appropriate mouse strain (C57BL/6 × DBA/2 F1 vs. C57BL/6) expressed the Y-Ae epitope.

Bottom Line: Shortman. 1992.Therefore DCs within the T cell areas can be isolated.Because they present very high levels of self peptides, these DCs should be considered in the regulation of self reactivity in the periphery.

View Article: PubMed Central - PubMed

Affiliation: Kyoto University, Kitashirakawa-Oiusake-cho, Kyoto 606-01, Japan.

ABSTRACT
T lymphocytes recirculate continually through the T cell areas of peripheral lymph nodes. During each passage, the T cells survey the surface of large dendritic cells (DCs), also known as interdigitating cells. However, these DCs have been difficult to release from the lymph node. By emphasizing the use of calcium-free media, as shown by Vremec et al. (Vremec, D., M. Zorbas, R. Scollay, D.J. Saunders, C.F. Ardavin, L. Wu, and K. Shortman. 1992. J. Exp. Med. 176:47-58.), we have been able to release and enrich DCs from the T cell areas. The DCs express the CD11c leukocyte integrin, the DEC-205 multilectin receptor for antigen presentation, the intracellular granule antigens which are recognized by monoclonal antibodies M342, 2A1, and MIDC-8, very high levels of MHC I and MHC II, and abundant accessory molecules such as CD40, CD54, and CD86. When examined with the Y-Ae monoclonal which recognizes complexes formed between I-Ab and a peptide derived from I-Ealpha, the T cell area DCs expressed the highest levels. The enriched DCs also stimulated a T-T hybridoma specific for this MHC II-peptide complex, and the hybridoma underwent apoptosis. Therefore DCs within the T cell areas can be isolated. Because they present very high levels of self peptides, these DCs should be considered in the regulation of self reactivity in the periphery.

Show MeSH