Tuberculosis(TB),is an infectious disease caused by Mycobacterium tuberculosis(M.tuberculosis),and presents with high morbidity and mortality.Alveolar macrophages play an important role in TB pathogenesis although the...Tuberculosis(TB),is an infectious disease caused by Mycobacterium tuberculosis(M.tuberculosis),and presents with high morbidity and mortality.Alveolar macrophages play an important role in TB pathogenesis although there is heterogeneity and functional plasticity.This study aimed to show the characteristics of alveolar macrophages from bronchioalveolar lavage fluid(BALF)in active TB patients.Single-cell RNA sequencing(scRNA-seq)was performed on BALF cells from three patients with active TB and additional scRNA-seq data from three healthy adults were established as controls.Transcriptional profiles were analyzed and compared by differential gene expression and functional enrichment analysis.We applied pseudo-temporal trajectory analysis to investigate correlations and heterogeneity within alveolar macrophage subclusters.Alveolar macrophages from active TB patients at the single-cell resolution are described.We found that TB patients have higher cellular percentages in five macrophage subclusters.Alveolar macrophage subclusters with increased percentages were involved in inflammatory signaling pathways as well as the basic macrophage functions.The TB-increased alveolar macrophage subclusters might be derived from M1-like polarization state,before switching to an M2-like polarization state with the development of M.tuberculosis infection.Cell-cell communications of alveolar macrophages also increased and enhanced in active TB patients.Overall,our study demonstrated the characteristics of alveolar macrophages from BALF in active TB patients by using scRNA-seq.展开更多
Summary: By using immunohistochemistry LSAB method and imaging analysis technique, the ex- pression of al-antitrypsinase (α1-AT) in 41 cases of bronchioalveolar carcinoma (BAC) was quan- titatively detected to explo...Summary: By using immunohistochemistry LSAB method and imaging analysis technique, the ex- pression of al-antitrypsinase (α1-AT) in 41 cases of bronchioalveolar carcinoma (BAC) was quan- titatively detected to explore the relationship between α1-AT expression in BAC tissues and clinical pathology. The results showed that the total positive rate for α1-AT expression was 85. 4 %. The positive rate for α1-AT expression in alveolar BAC was 100 %, with the immunity reactive stain- ing intensity being significantly higher than in papillary BAC, mucinous BAC or sclerosing BAC (P<0. 05). The positive rate in papillary BAC was 93. 3 %, with the intensity higher mucinous BAC or sclerosing BAC (P<0. 01); The positive rate in both mucinous BAC and sclerosing BAC was 66. 7 % (P>0. 05); The expression intensity in lymph node metastatic group was obviously lower than that in the group without metastasis (P<0.01); The patients with mucinous BAC were diagnosed at a younger age than those with other histologic types of BAC (P<0. 05). It was suggested that BAC cells could also produce al-AT. Detection of α1-AT could be used as a new method to diagnose BAC and might play a role in assessing BAC metastasis.展开更多
基金funded by grants from the National Natural Science Foundation of China (Grant No. 81800090)the Key Project of National Science & Technology for Infectious Diseases of China (Grant No. 2018ZX10722301-002)
文摘Tuberculosis(TB),is an infectious disease caused by Mycobacterium tuberculosis(M.tuberculosis),and presents with high morbidity and mortality.Alveolar macrophages play an important role in TB pathogenesis although there is heterogeneity and functional plasticity.This study aimed to show the characteristics of alveolar macrophages from bronchioalveolar lavage fluid(BALF)in active TB patients.Single-cell RNA sequencing(scRNA-seq)was performed on BALF cells from three patients with active TB and additional scRNA-seq data from three healthy adults were established as controls.Transcriptional profiles were analyzed and compared by differential gene expression and functional enrichment analysis.We applied pseudo-temporal trajectory analysis to investigate correlations and heterogeneity within alveolar macrophage subclusters.Alveolar macrophages from active TB patients at the single-cell resolution are described.We found that TB patients have higher cellular percentages in five macrophage subclusters.Alveolar macrophage subclusters with increased percentages were involved in inflammatory signaling pathways as well as the basic macrophage functions.The TB-increased alveolar macrophage subclusters might be derived from M1-like polarization state,before switching to an M2-like polarization state with the development of M.tuberculosis infection.Cell-cell communications of alveolar macrophages also increased and enhanced in active TB patients.Overall,our study demonstrated the characteristics of alveolar macrophages from BALF in active TB patients by using scRNA-seq.
文摘Summary: By using immunohistochemistry LSAB method and imaging analysis technique, the ex- pression of al-antitrypsinase (α1-AT) in 41 cases of bronchioalveolar carcinoma (BAC) was quan- titatively detected to explore the relationship between α1-AT expression in BAC tissues and clinical pathology. The results showed that the total positive rate for α1-AT expression was 85. 4 %. The positive rate for α1-AT expression in alveolar BAC was 100 %, with the immunity reactive stain- ing intensity being significantly higher than in papillary BAC, mucinous BAC or sclerosing BAC (P<0. 05). The positive rate in papillary BAC was 93. 3 %, with the intensity higher mucinous BAC or sclerosing BAC (P<0. 01); The positive rate in both mucinous BAC and sclerosing BAC was 66. 7 % (P>0. 05); The expression intensity in lymph node metastatic group was obviously lower than that in the group without metastasis (P<0.01); The patients with mucinous BAC were diagnosed at a younger age than those with other histologic types of BAC (P<0. 05). It was suggested that BAC cells could also produce al-AT. Detection of α1-AT could be used as a new method to diagnose BAC and might play a role in assessing BAC metastasis.
