제목 | [논문] 배외식 교수님_Novel CD11b+Gr-1+Sca-1+ myeloid cells drive mortality in bacterial infection | ||||
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작성자 | 비임파성 장기 면역 연구센터 | 등록일 | 2021-01-26 | 조회수 | 791 |
Novel CD11b+Gr-1+Sca-1+ myeloid cells drive mortality in bacterial infection
Extreme pathophysiological stressors induce expansion of otherwise infrequent leukocyte populations. Here, we found a previously unidentified CD11b+Gr-1+ myeloid cell population that expresses stem cell antigen-1 (Sca-1) induced upon experimental infection with Staphylococcus aureus. Although CD11b+Gr-1+Sca-1+ cells have impaired migratory capacity and superoxide anion–producing activity, they secrete increased levels of several cytokines and chemokines compared to Sca-1− counterparts. The generation of CD11b+Gr-1+Sca-1+ cells is dependent on IFN-in vivo, and in vitro stimulation of bone marrow cells or granulocyte-macrophage progenitors with IFN-generated CD11b+Gr-1+Sca-1+ cells. Depletion of CD11b+Gr-1+Sca-1+ cells by administrating anti–Sca-1 antibody strongly increased survival rates in an S. aureus infection model by reducing organ damage and inflammatory cytokines. However, adoptive transfer of CD11b+Gr-1+Sca-1+ cells decreased survival rates by worsening the pathogenesis of S. aureus infection. Together, we found a previously unidentified pathogenic CD11b+Gr-1+Sca-1+ population that plays an essential role in mortality during bacterial infection. |