title: Abnormal Distribution and Function of Monocyte Subsets in Patients With Primary Immune Thrombocytopenia.
abstract: Human monocytes are heterogeneous and play an important role in autoimmune diseases. However, the distribution and function of monocyte subsets remain unclear in primary immune thrombocytopenia (ITP). In this study, we determined the frequencies of monocyte subsets in 71 untreated patients with active ITP and 49 healthy controls by flow cytometry. Compared with controls, the frequency of nonclassical monocytes was significantly increased in patients with active ITP but decreased after complete remission. The intermediate subset was also increased in patients with active ITP and produced the highest levels of tumor necrosis factor α and interleukin 1β. Both the nonclassical and intermediate subsets were negatively correlated with the platelet counts. We further determined the correlation between monocyte subsets and the proliferation of platelet-autoreactive T cells. The purified monocyte subsets were cocultured with CD4+T cells and autologous platelets. The nonclassical subset showed the highest capability of promoting platelet reactive T-cell proliferation and significantly promoted the secretion of interferon γ among the 3 subsets. In conclusion, the nonclassical and intermediate monocyte subsets are both expanded and play different roles in the pathogenesis of ITP.
authors.affiliation: 1 Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China.|2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Yang
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Zhang
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Donglei
authors.initials: D
authors.lastname: Zhang
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Huiyuan
authors.initials: H
authors.lastname: Li
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Li
authors.initials: L
authors.lastname: Ma
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Min
authors.initials: M
authors.lastname: Xuan
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Wang
authors.affiliation: 2 State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
authors.forename: Renchi
authors.initials: R
authors.lastname: Yang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001792:Blood Platelets; D015496:CD4-Positive T-Lymphocytes; D016022:Case-Control Studies; D002450:Cell Communication; D049109:Cell Proliferation; D018920:Coculture Techniques; D005260:Female; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000473:pathology*; D016553:Purpura, Thrombocytopenic, Idiopathic / Q000097:blood / Q000473:pathology*; D055815:Young Adult
chemical_list: D007371:Interferon-gamma
keywords: classical monocyte; intermediate monocyte; nonclassical monocyte; platelet-autoreactive T cells; primary immune thrombocytopenia