Related Experiment Videos
Ly49Q defines 2 pDC subsets in mice.
Yumiko Kamogawa-Schifter1, Jun Ohkawa, Sahori Namiki
1Department of Immunobiology, Ginkgo Biomedical Research Institute, 4-7-4-8F Shirokanedai, Minato-ku, Tokyo, 108-0071 Japan. kamogawa@ginkgobio.co.jp
Blood
|December 16, 2004
Summary
Researchers identified Ly49Q as a specific marker for plasmacytoid dendritic cells (pDCs). Ly49Q expression distinguishes pDC subsets in bone marrow, impacting their immune response to viral infections.
Area of Science:
- Immunology
- Cell Biology
Background:
- Plasmacytoid dendritic cells (pDCs) are crucial for antiviral innate immunity, producing type 1 interferon (IFN).
- Understanding pDC heterogeneity is key to deciphering their immune functions.
Purpose of the Study:
- To identify specific markers for pDCs.
- To characterize distinct pDC subsets and their functional differences.
Main Methods:
- Generation of a monoclonal antibody (2E6) targeting pDCs.
- Molecular cloning and characterization of the 2E6 antigen (Ly49Q).
- Flow cytometry analysis of Ly49Q expression on pDCs from different tissues.
Main Results:
- The 2E6 antigen was identified as Ly49Q, a type II C-type lectin homologous to NK receptor family Ly49.
- Ly49Q is expressed on pDCs but not NK or myeloid dendritic cells.
- Ly49Q+ and Ly49Q- pDC subsets were identified in bone marrow, exhibiting differential responses to viral and CpG stimulation.
- Ly49Q+ pDCs were found in peripheral tissues, while Ly49Q- pDCs were primarily in bone marrow.
Conclusions:
- Ly49Q serves as a specific marker for peripheral pDCs.
- Ly49Q expression defines functionally distinct pDC subsets in the bone marrow.
- Ly49Q+ and Ly49Q- pDCs exhibit differential cytokine production and antiviral responses.