MacrophagePub Date : 2018-03-09DOI: 10.14800/MACROPHAGE.1629
H. She, Yingli He, Ying‐ren Zhao, Zixu Mao
{"title":"Autophagy in inflammation: the p38α MAPK-ULK1 axis","authors":"H. She, Yingli He, Ying‐ren Zhao, Zixu Mao","doi":"10.14800/MACROPHAGE.1629","DOIUrl":"https://doi.org/10.14800/MACROPHAGE.1629","url":null,"abstract":"Autophagy and inflammation are two processes vital for immune cells to perform their functions. Their proper interplay upon signal is pivotal for proper response to stress. The stress kinase p38α MAPK in microglia senses inflammatory cue LPS, directly phosphorylates ULK1, relieves the autophagic inhibition on the inflammatory machinery, and thus allows for a full immune response.","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48864310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2018-01-01Epub Date: 2018-03-09
Hua She, Yingli He, Yingren Zhao, Zixu Mao
{"title":"Autophagy in inflammation: the p38α MAPK-ULK1 axis.","authors":"Hua She, Yingli He, Yingren Zhao, Zixu Mao","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Autophagy and inflammation are two processes vital for immune cells to perform their functions. Their proper interplay upon signal is pivotal for proper response to stress. The stress kinase p38α MAPK in microglia senses inflammatory cue LPS, directly phosphorylates ULK1, relieves the autophagic inhibition on the inflammatory machinery, and thus allows for a full immune response.</p>","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"5 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5933864/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36077622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2017-09-18DOI: 10.14800/MACROPHAGE.1594
X. Dai, I. Okon, M. Zou
{"title":"Myeloid cell neuropilin 1 ameliorates high-fat diet-induced insulin resistance via suppression of Nlrp3 inflammasome.","authors":"X. Dai, I. Okon, M. Zou","doi":"10.14800/MACROPHAGE.1594","DOIUrl":"https://doi.org/10.14800/MACROPHAGE.1594","url":null,"abstract":"The history of neuropilin 1 (Nrp1) research is checkered with many unexpected and exciting findings. Nrp1 functions as a co-receptor for class 3 semaphorins, and several canonical growth factors, including vascular endothelial growth factor (VEGF) and hepatocyte growth factor (HGF). It has been implicated in the development of central nervous system, angiogenesis, and migration. Accumulating evidence demonstrates that Nrp1 is also highly expressed in immune cells, including macrophages and dendritic cells. Until now, the functions of Nrp1 within these cells remained poorly studied and elusive. Here, we provide exciting insights on a novel role for myeloid cell Nrp1 in the mitigation of dietary insulin resistance through inhibiting Nlrp3 inflammasome.","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41721905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2017-01-01Epub Date: 2017-09-19
Xiaoyan Dai, Imoh Okon, Ming-Hui Zou
{"title":"Myeloid cell neuropilin 1 ameliorates high-fat diet-induced insulin resistance via suppression of Nlrp3 inflammasome.","authors":"Xiaoyan Dai, Imoh Okon, Ming-Hui Zou","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The history of neuropilin 1 (Nrp1) research is checkered with many unexpected and exciting findings. Nrp1 functions as a co-receptor for class 3 semaphorins, and several canonical growth factors, including vascular endothelial growth factor (VEGF) and hepatocyte growth factor (HGF). It has been implicated in the development of central nervous system, angiogenesis, and migration. Accumulating evidence demonstrates that Nrp1 is also highly expressed in immune cells, including macrophages and dendritic cells. Until now, the functions of Nrp1 within these cells remained poorly studied and elusive. Here, we provide exciting insights on a novel role for myeloid cell Nrp1 in the mitigation of dietary insulin resistance through inhibiting Nlrp3 inflammasome.</p>","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"4 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5659715/pdf/nihms913023.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35649169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2017-01-01Epub Date: 2017-03-13DOI: 10.14800/Macrophage.1521
Ren Xu
{"title":"Mammary epithelial polarity and macrophage infiltration.","authors":"Ren Xu","doi":"10.14800/Macrophage.1521","DOIUrl":"https://doi.org/10.14800/Macrophage.1521","url":null,"abstract":"<p><p>Loss of epithelial cell polarity and inflammation are hallmarks of breast cancer development. Although the association between the disruption of tissue polarity and inflammation has been demonstrated, we know little about how these two events are coupled. Using the 3D co-culture model of mammary epithelial cells and monocytes, a recent study reveals a link between disruption of epithelial polarity and monocytes infiltration.</p>","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"4 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5485912/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35131134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2016-10-17DOI: 10.14800/MACROPHAGE.1435
O. Jobe, Jiae Kim, M. Rao
{"title":"The role of Siglec-1 in HIV-1/macrophage interaction.","authors":"O. Jobe, Jiae Kim, M. Rao","doi":"10.14800/MACROPHAGE.1435","DOIUrl":"https://doi.org/10.14800/MACROPHAGE.1435","url":null,"abstract":"Although CD4 T-cells are a major target for HIV, recent work has demonstrated the ability of macrophages despite expressing relatively low levels of CD4, to be a target of the virus. Our recent study has found that the presence of growth factors not only play a role in the phenotype of these monocyte-derived-macrophages, but also are an important aspect of the permissiveness of these cells to infection. The work utilized cellular and biophysical methods to examine Siglec-1 on macrophages as a primary receptor in HIV-1 infection. These findings support the notion that Siglec-1 and macrophages and their interactions with the HIV-1 envelope should be considered in HIV-1 vaccine development.","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66657146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2016-04-22DOI: 10.14800/MACROPHAGE.1261
Anna Malawista, Xiaomei Wang, M. Trentalange, H. Allore, Ruth R. Montgomery
{"title":"Coordinated expression of tyro3, axl, and mer receptors in macrophage ontogeny","authors":"Anna Malawista, Xiaomei Wang, M. Trentalange, H. Allore, Ruth R. Montgomery","doi":"10.14800/MACROPHAGE.1261","DOIUrl":"https://doi.org/10.14800/MACROPHAGE.1261","url":null,"abstract":"The TAM receptors (Tyro3, Axl, and Mer) are a family of homologous receptor-tyrosine kinases that inhibit Toll-like receptor signaling to regulate downstream pathways and restore homeostasis. TAM triple mutant mice (Tyro3−/−, Axl−/−, Mer−/−) have elevated levels of pro-inflammatory cytokines and are prone to developing lymphoproliferative disorders and autoimmunity. Understanding differential expression of TAM receptors among human subjects is critical to harnessing this pathway for therapeutic interventions. We have quantified changes in TAM expression during the ontogeny of human macrophages using paired samples of monocytes and macrophages to take advantage of characteristic expression within an individual. No significant differences in levels of Tyro3 were found between monocytes and macrophages (flow cytometry: p=0.652, immunoblot: p=0.231, qPCR: p=0.389). Protein levels of Axl were reduced (flow cytometry: p=0.049, immunoblot: p<0.001) when monocytes matured to macrophages. No significant differences in the levels of Axl mRNA transcripts were found (qPCR: p=0.082), however, Tyro3 and Axl were proportionate. The most striking difference was upregulation of expression of Mer with both protein and mRNA being significantly increased when monocytes developed into macrophages (flow cytometry: p<0.001, immunoblot: p<0.001, qPCR: p=0.004). A fuller characterization of TAM receptor expression in macrophage ontogeny informs our understanding of their function and potential therapeutic interventions.","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66657062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2016-02-01DOI: 10.14800/macrophage.1166
Eliseo F. Castillo, A. Ray, E. Beswick
{"title":"MK2: an unrecognized regulator of tumor promoting macrophages in colorectal cancer?","authors":"Eliseo F. Castillo, A. Ray, E. Beswick","doi":"10.14800/macrophage.1166","DOIUrl":"https://doi.org/10.14800/macrophage.1166","url":null,"abstract":"Colorectal cancer (CRC) is one of the most common malignancies and is associated closely with inflammation before and after development. Macrophages promote colitis and colitis-associated CRC. M1 macrophages contribute to colitis directly through the production of proinflammatory cytokines and through activation of proinflammatory immune cell phenotypes. In cancer, both M1 and M2 macrophages participate in tumor development and progression through cytokine production, changes in cell signaling and activation of T cells. We have identified the mitogen-activated protein kinase-activated protein kinase 2 (MK2) as a regulator of macrophages during colitis-associated CRC (CAC). MK2 is a proinflammatory kinase that promotes production of IL-1α, IL-1β, IL-6 and TNF-α. MK2−/− mice have decreases in macrophages, macrophage-associated chemokines, and proinflammatory cytokines. Most significantly, MK2−/− mice do not develop neoplasms in an inflammatory model of CRC. However, addition of MK2+/+ macrophages to MK2−/− mice increases production of proinflammatory cytokines. In wild type mice, both cytokines and tumor burdens increase upon addition of additional macrophages. These data support the importance of MK2 in macrophage regulation during inflammation-associated CRC.","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66657043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2016-01-01Epub Date: 2016-09-17
Ousman Jobe, Jiae Kim, Mangala Rao
{"title":"The role of Siglec-1 in HIV-1/macrophage interaction.","authors":"Ousman Jobe, Jiae Kim, Mangala Rao","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Although CD4 T-cells are a major target for HIV, recent work has demonstrated the ability of macrophages despite expressing relatively low levels of CD4, to be a target of the virus. Our recent study has found that the presence of growth factors not only play a role in the phenotype of these monocyte-derived-macrophages, but also are an important aspect of the permissiveness of these cells to infection. The work utilized cellular and biophysical methods to examine Siglec-1 on macrophages as a primary receptor in HIV-1 infection. These findings support the notion that Siglec-1 and macrophages and their interactions with the HIV-1 envelope should be considered in HIV-1 vaccine development.</p>","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"3 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5341613/pdf/nihms-825541.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34805646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MacrophagePub Date : 2015-09-30DOI: 10.14800/MACROPHAGE.1009
Almin I. Lalani, Chang Luo, Yeming Han, P. Xie
{"title":"TRAF3: a novel tumor suppressor gene in macrophages.","authors":"Almin I. Lalani, Chang Luo, Yeming Han, P. Xie","doi":"10.14800/MACROPHAGE.1009","DOIUrl":"https://doi.org/10.14800/MACROPHAGE.1009","url":null,"abstract":"Tumor necrosis factor receptor-associated factor 3 (TRAF3), a member of the TRAF family of cytoplasmic adaptor proteins with E3 ligase activity, is ubiquitously expressed in various cell types of the immune system. It is shared for signaling by a variety of adaptive and innate immune receptors as well as cytokine receptors. Previous studies examining conditional TRAF3-deficient mouse models that have the Traf3 gene specifically deleted in B lymphocytes or T lymphocytes have revealed the diverse and critical in vivo functions of TRAF3 in adaptive immunity. Although in vitro evidence points to a pivotal and indispensable role for TRAF3 in type I interferon production induced by pattern recognition receptors in macrophages and dendritic cells, the in vivo functions of TRAF3 in the innate immune system had long remained unclear. Three laboratories have recently addressed this gap in knowledge by investigating myeloid cell-specific TRAF3-deficient (genotype: TRAF3flox/floxLysM+/Cre) mice. The new evidence together demonstrates that specific ablation of TRAF3 in myeloid cells leads to inflammatory diseases, altered progression of diabetes, and spontaneous development of different types of tumors and infections in mice. These new findings indicate that TRAF3 acts as an anti-inflammatory factor and is required for optimal innate immunity in myeloid cells. Strikingly, the new evidence also identifies TRAF3 as a novel tumor suppressor gene in macrophages and other myeloid cells. In this review, we discuss and summarize the new findings and current knowledge about the multi-faceted regulatory roles and complex signaling mechanisms of myeloid cell TRAF3 in inflammation, innate immunity, and tumor development.","PeriodicalId":90918,"journal":{"name":"Macrophage","volume":"2 1","pages":"e1009"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66656983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}