Abstract |
Programmed death-1 (PD-1) and its ligands, B7-H1/PD-L1 and B7-DC/PD-L2, are new CD28-B7 family members that may be involved in the regulation of immune responses. We examined the roles of these molecules in mouse hapten-induced contact hypersensitivity (CH). Administration of anti-PD-1 mAb at sensitization significantly enhanced and prolonged ear swelling. Treatment with anti-B7-H1 mAb, but not anti-B7-DC mAb, also enhanced CH reactions. The anti-PD-1 mAb treatment at sensitization significantly increased the T cell number of draining lymph nodes (DLN). B7-H1 was induced on activated T cells and antigen-presenting cells (APC) in the skin and the DLN, whereas B7-DC expression was restricted to dendritic cells (DC) in the dermis and the DLN. A particular subset of DC, B7-H1(+)B7-DC(-)CD86(low), was found in sensitized DLN. The blockade of B7-H1, but not B7-DC, dramatically enhanced the initial T cell proliferative responses against hapten-pulsed DLN APC, suggesting the preferential contribution of B7-H1 to the T cell-APC interaction. Our results demonstrate the regulatory role of PD-1 and the differential roles of B7-H1 and B7-DC in hapten-induced immune responses. The PD-1-B7-H1 pathway may play a unique role in regulating inflammatory responses.
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Authors | Fumihiko Tsushima, Hideyuki Iwai, Noriko Otsuki, Masaaki Abe, Sachiko Hirose, Tomohide Yamazaki, Hisaya Akiba, Hideo Yagita, Yuzo Takahashi, Ken Omura, Ko Okumura, Miyuki Azuma |
Journal | European journal of immunology
(Eur J Immunol)
Vol. 33
Issue 10
Pg. 2773-82
(Oct 2003)
ISSN: 0014-2980 [Print] Germany |
PMID | 14515261
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antibodies, Monoclonal
- Antigens, CD
- Antigens, Differentiation
- Antigens, Surface
- Apoptosis Regulatory Proteins
- B7-1 Antigen
- B7-H1 Antigen
- Blood Proteins
- CTLA-4 Antigen
- Cd274 protein, mouse
- Ctla4 protein, mouse
- Haptens
- Membrane Glycoproteins
- Pdcd1 protein, mouse
- Pdcd1lg2 protein, mouse
- Peptides
- Programmed Cell Death 1 Ligand 2 Protein
- Programmed Cell Death 1 Receptor
- Proteins
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Topics |
- Animals
- Antibodies, Monoclonal
(immunology)
- Antigen-Presenting Cells
(chemistry, physiology)
- Antigens, CD
- Antigens, Differentiation
(physiology)
- Antigens, Surface
- Apoptosis Regulatory Proteins
- B7-1 Antigen
(analysis, physiology)
- B7-H1 Antigen
- Blood Proteins
- CTLA-4 Antigen
- Dermatitis, Contact
(etiology)
- Female
- Haptens
(immunology)
- Membrane Glycoproteins
- Mice
- Mice, Inbred BALB C
- Peptides
- Programmed Cell Death 1 Ligand 2 Protein
- Programmed Cell Death 1 Receptor
- Proteins
(physiology)
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