Single UM171-Expanded Cord Blood Transplant Can Cure Severe Idiopathic Aplastic Anemia in Absence of Suitable Donors

Investigators report the first case of an adult patient with severe aplastic anemia who was successfully transplanted with a UM171‐expanded cord blood graft. After a conditioning of rabbit anti‐thymocyte globulin, fludarabine, cyclophosphamide and total body irradiation, a UM171 expanded graft of 3.29 x 106 CD34+ cells/kg was infused.
[European Journal of Haematology]
Claveau, J.-S., Cohen, S., Ahmad, I., Delisle, J.-S., Kiss, T., Lachance, S., Sauvageau, G., Busque, L., Brito, R.-M., Bambace, N., Bernard, L., Roy, D. C., & Roy, J. (n.d.). Single UM171-expanded cord blood transplant can cure severe idiopathic aplastic anemia in absence of suitable donors. European Journal of Haematology, n/a(n/a). https://doi.org/10.1111/ejh.13504 Cite
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Immune Phenotyping of Diverse Syngeneic Murine Brain Tumors Identifies Immunologically Distinct Types

Researchers generated distinct imageable syngeneic mouse glioblastoma-tumor models and utilized RNA-sequencing, CyTOF and correlative immunohistochemistry to assess immune-profiles in these models.
[Nature Communications]
Khalsa, J. K., Cheng, N., Keegan, J., Chaudry, A., Driver, J., Bi, W. L., Lederer, J., & Shah, K. (2020). Immune phenotyping of diverse syngeneic murine brain tumors identifies immunologically distinct types. Nature Communications, 11(1), 3912. https://doi.org/10.1038/s41467-020-17704-5 Cite
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Pleiotropic Roles of Platelets and Neutrophils in Cell Death and Recovery during Acetaminophen Hepatotoxicity

The role of platelets in liver biology and pathophysiology has attracted increased attention during the last decade.
[Hepatology]
Jaeschke, H., & Ramachandran, A. (n.d.). Pleiotropic Roles of Platelets and Neutrophils in Cell Death and Recovery during Acetaminophen Hepatotoxicity. Hepatology, n/a(n/a). https://doi.org/10.1002/hep.31490 Cite
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Immunometabolism and HIV-1 Pathogenesis: Food for Thought

The authors summarize current knowledge of the links between HIV-1 infection and immunometabolism, and they discuss the potential opportunities and challenges for therapeutic interventions.
[Nature Reviews Immunology]
Sáez-Cirión, A., & Sereti, I. (2020). Immunometabolism and HIV-1 pathogenesis: food for thought. Nature Reviews Immunology, 1–15. https://doi.org/10.1038/s41577-020-0381-7 Cite
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Single-Cell Analysis of Two Severe COVID-19 Patients Reveals a Monocyte-Associated and Tocilizumab-Responding Cytokine Storm

By employing single-cell analysis of the immune cell composition of two severe-stage COVID-19 patients prior to and following tocilizumab-induced remission, investigators identified a monocyte subpopulation that contributes to the inflammatory cytokine storms.
[Nature Communications]
Guo, C., Li, B., Ma, H., Wang, X., Cai, P., Yu, Q., Zhu, L., Jin, L., Jiang, C., Fang, J., Liu, Q., Zong, D., Zhang, W., Lu, Y., Li, K., Gao, X., Fu, B., Liu, L., Ma, X., … Qu, K. (2020). Single-cell analysis of two severe COVID-19 patients reveals a monocyte-associated and tocilizumab-responding cytokine storm. Nature Communications, 11(1), 3924. https://doi.org/10.1038/s41467-020-17834-w Cite
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Pharmacological Activation of the Circadian Component REV-ERB Inhibits HIV-1 Replication

Researchers investigated whether REV-ERB activity regulates HIV-1 replication and found REV-ERB agonists inhibited HIV-1 promoter activity in cell lines, primary human CD4 T cells and macrophages, whilst antagonism or genetic disruption of REV-ERB increased promoter activity.
[Scientific Reports]
Borrmann, H., Davies, R., Dickinson, M., Pedroza-Pacheco, I., Schilling, M., Vaughan-Jackson, A., Magri, A., James, W., Balfe, P., Borrow, P., McKeating, J. A., & Zhuang, X. (2020). Pharmacological activation of the circadian component REV-ERB inhibits HIV-1 replication. Scientific Reports, 10(1), 13271. https://doi.org/10.1038/s41598-020-70170-3 Cite
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Bone Marrow-Derived Myeloid Progenitors as Driver Mutation Carriers in High- and Low-Risk Langerhans Cell Histiocytosis

Investigators examined the CD34+c-Kit+Flt3+ myeloid progenitor population as potential mutation carrier in all langerhans cell histiocytosis disease manifestations.
[Blood]
Xiao, Y., van Halteren, A. G., Lei, X., Borst, J., Steenwijk, E. C., de Wit, T., Grabowska, J., Voogd, R., Kemps, P. G., Picarsic, J., van den Bos, C., & Borst, J. (n.d.). Bone marrow-derived myeloid progenitors as driver mutation carriers in high- and low-risk Langerhans cell histiocytosis. Blood. https://doi.org/10.1182/blood.2020005209 Cite
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Aesculetin Attenuates Alveolar Injury and Fibrosis Induced by Close Contact of Alveolar Epithelial Cells with Blood-Derived Macrophages via IL-8 Signaling

Human alveolar epithelial A549 cells were cultured for 24 hours in conditioned media of THP-1 monocyte-derived macrophages with 1–20 μM aesculetin.
[International Journal of Molecular Sciences]
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Systems-Level Immunomonitoring from Acute to Recovery Phase of Severe COVID-19

Scientists report on a systems-level blood immunomonitoring study of 37 adult patients diagnosed with COVID-19 and followed with up to 14 blood samples from acute to recovery phases of the disease.
[Cell Reports Medicine]
Rodriguez, L., Pekkarinen, P. T., Lakshmikanth, T., Tan, Z., Consiglio, C. R., Pou, C., Chen, Y., Mugabo, C. H., Nguyen, N. A., Nowlan, K., Strandin, T., Levanov, L., Mikes, J., Wang, J., Kantele, A., Hepojoki, J., Vapalahti, O., Heinonen, S., Kekäläinen, E., & Brodin, P. (2020). Systems-level immunomonitoring from acute to recovery phase of severe COVID-19. Cell Reports Medicine, 0(0). https://doi.org/10.1016/j.xcrm.2020.100078 Cite
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Lysophosphatidic Acid-Mediated GPR35 Signaling in CX3CR1+ Macrophages Regulates Intestinal Homeostasis

Investigators demonstrated that intestinal G protein-coupled receptor 35 (Gpr35) expression was microbiota dependent and enhanced upon inflammation. Moreover, murine GPR35+ colonic macrophages were characterized by enhanced production of pro-inflammatory cytokines.
[Cell Reports]
Kaya, B., Doñas, C., Wuggenig, P., Diaz, O. E., Morales, R. A., Melhem, H., Hernández, P. P., Kaymak, T., Das, S., Hruz, P., Franc, Y., Geier, F., Ayata, C. K., Villablanca, E. J., & Niess, J. H. (2020). Lysophosphatidic Acid-Mediated GPR35 Signaling in CX3CR1+ Macrophages Regulates Intestinal Homeostasis. Cell Reports, 32(5). https://doi.org/10.1016/j.celrep.2020.107979 Cite
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In Situ Neutrophil Efferocytosis Shapes T Cell Immunity to Influenza Infection

Newly infiltrated inflammatory monocytes became a chief pool of phagocytes and played a key role in the clearance of highly motile apoptotic neutrophils during the resolution phase.
[Nature Immunology]
Lim, K., Kim, T., Trzeciak, A., Amitrano, A. M., Reilly, E. C., Prizant, H., Fowell, D. J., Topham, D. J., & Kim, M. (2020). In situ neutrophil efferocytosis shapes T cell immunity to influenza infection. Nature Immunology, 1–12. https://doi.org/10.1038/s41590-020-0746-x Cite
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