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Nicolle H R Litjens, Lotte van der Wagen, Jurgen Kuball, Jaap Kwekkeboom
Cytomegalovirus (CMV) infection can cause significant complications after transplantation, but recent emerging data suggest that CMV may paradoxically also exert beneficial effects in two specific allogeneic transplant settings. These potential benefits have been underappreciated and are therefore highlighted in this review. First, after allogeneic hematopoietic stem cell transplantation (HSCT) for acute myeloid leukemia (AML) using T-cell and natural killer (NK) cell-replete grafts, CMV reactivation is associated with protection from leukemic relapse...
2018: Frontiers in Immunology
M Killer-Oberpfalzer, N Kocer, C J Griessenauer, H Janssen, T Engelhorn, M Holtmannspötter, J H Buhk, T Finkenzeller, G Fesl, J Trenkler, W Reith, A Berlis, K Hausegger, M Augustin, C Islak, B Minnich, M Möhlenbruch
BACKGROUND AND PURPOSE: Endoluminal reconstruction with flow-diverting stents represents a widely accepted technique for the treatment of complex intracranial aneurysms. This European registry study analyzed the initial experience of 15 neurovascular centers with the Flow-Redirection Intraluminal Device (FRED) system. MATERIALS AND METHODS: Consecutive patients with intracranial aneurysms treated with the FRED between February 2012 and March 2015 were retrospectively reviewed...
March 15, 2018: AJNR. American Journal of Neuroradiology
Yung-Che Chen, Meng-Chih Lin, Chih-Hung Lee, Shih-Feng Liu, Chin-Chou Wang, Wen-Feng Fang, Tung-Ying Chao, Chao-Chien Wu, Yu-Feng Wei, Huang-Chih Chang, Chia-Cheng Tsen, Hung-Chen Chen
BACKGROUND: Controversy exists in previous studies on macrophage M1/M2 polarization in chronic obstructive pulmonary disease (COPD). We hypothesized that formyl peptide receptor (FPR), a marker of efferocytosis and mediator of M1/M2 polarization, may be involved in the development of COPD. METHODS: We examined FPR 1/2/3 expressions of blood M1/M2a monocyte, neutrophil, natural killer (NK) cell, NK T cell, T helper (Th) cell, and T cytotoxic (Tc) cell by flowcytometry method in 40 patients with cigarette smoking-related COPD and 16 healthy non-smokers...
March 15, 2018: Journal of Translational Medicine
Rose Nabatanzi, Stephen Cose, Moses Joloba, Sarah Rowland Jones, Damalie Nakanjako
HIV infection causes upregulation of markers of inflammation, immune activation and apoptosis of host adaptive, and innate immune cells particularly monocytes, natural killer (NK) and innate lymphoid cells (ILCs). Although antiretroviral therapy (ART) restores CD4 T-cell counts, the persistent aberrant activation of monocytes, NK and ILCs observed likely contributes to the incomplete recovery of T-cell effector functions. A better understanding of the effects of HIV infection and ART on the phenotype and function of circulating monocytes, NK, and ILCs is required to guide development of novel therapeutic interventions to optimize immune recovery...
March 15, 2018: AIDS Research and Therapy
Jessica E Martin, Dale A Sandercock, Victoria Sandilands, Julian Sparrey, Laurence Baker, Nick H C Sparks, Dorothy E F McKeegan
Council Regulation (EC) no. 1099/2009 on the protection of animals at the time of killing restricts the use of manual cervical dislocation in poultry on farms in the European Union (EU) to birds weighing up to 3 kg and 70 birds per person per day. However, few studies have examined whether repeated application of manual cervical dislocation has welfare implications and whether these are dependent on individual operator skill or susceptibility to fatigue. We investigated the effects of repeated application (100 birds at a fixed killing rate of 1 bird per 2 min) and multiple operators on two methods of killing of broilers, laying hens, and turkeys in commercial settings...
March 15, 2018: Animals: An Open Access Journal From MDPI
Francisco S Barreto, Adriano J M Chaves Filho, Márcia C C R de Araújo, Manoel O de Moraes, Maria E A de Moraes, Michael Maes, David F de Lucena, Danielle S Macedo
Both depression and cancer are related to a dysregulation of inflammatory and immune pathways. Indeed, depression is associated with increased expression of interferon-γ, interleukin-1β, and tumor necrosis factor α (TNF-α). In contrast, reductions of the activity of major histocompatibility complex protein molecules - class I and class II and natural killer cells are also observed. Similarly, cancers present elevated levels of TNF-α, reduced major histocompatibility complex class I and II, and natural killer cells...
April 2018: Behavioural Pharmacology
Dávid Szamosvári, Sina Rütschlin, Thomas Böttcher
Bacteria engage in numerous collaborative and competitive interactions, which are often mediated by small molecule metabolites. Bacterial competition involves for example the production of compounds that effectively kill or inhibit growth of their neighbours but also the secretion of siderophores that allow securing the essential and fiercely embattled resource of ferric iron. Yet, the enormous diversity of metabolites produced has remained puzzling in many cases. We here present examples of both types of competition from our recent work...
March 15, 2018: Organic & Biomolecular Chemistry
Alexandra Witze
No abstract text is available yet for this article.
March 15, 2018: Nature
Amanda Przespolewski, Andras Szeles, Eunice S Wang
Evasion of the host immune system is a key mechanism to promote malignant progression. Therapeutically targeting immune pathways has radically changed the treatment paradigm for solid and lymphoid tumors but has yet to be approved for myeloid malignancies. Here, we summarize the most recent advances in immunotherapy for acute myeloid leukemia. Topics reviewed here include adoptive cellular approaches (chimeric antigen receptor-T cells, natural killer and other immune cells), checkpoint inhibitors (anti-PD-1/PD-L1, anti-CTLA-4 and TIM-3) and vaccines (WT-1, HLA-A2 and hTERT)...
March 15, 2018: Future Oncology
N A Filatova, N A Knyazev, S O Skarlato, O V Anatskaya, A E Vinogradov
Cryptosporidiosis causes persistent diarrhea in infants, immunocompromised patients and elderly persons. Long-term consequences of the disease include increased risk of malignancy, cardiomyopathy and gastrointestinal inflammation. This study aimed to investigate prolonged effects of cryptosporidiosis on innate immunity and growth in neonatal C3HA mice. The disease was challenged by Cryptosporidium parvum oocyst inoculation into 7-days old animals. The mice whose intestine smears contained 3-5 or 6 and more oocysts per microscopic field at the day 5 after infection were considered as mildly or severely infected, correspondingly...
March 14, 2018: Parasite Immunology
Lucía Fernández, Alejandra Leivas, Jaime Valentín, Adela Escudero, Dolores Corral, Raquel de Paz, Maria Vela, David Bueno, Rebeca Rodríguez, Juan Manuel Torres, Mariana Díaz-Almirón, Eduardo López-Collazo, Joaquin Martinez-Lopez, Antonio Pérez-Martínez
BACKGROUND: Cancer immunotherapy involving natural killer (NK) cells has gained interest. Here we report two methods to obtain interleukin (IL)-15-activated NK cells for clinical use. STUDY DESIGN AND METHODS: IL-15-activated NK cell products were obtained after 1) enrichment from healthy haploidentical donors' peripheral blood mononuclear cells (PBMNCs) collected by nonmobilized apheresis by a two-step magnetic procedure, depletion of CD3+ cells followed by selection of CD56+ cells and ex vivo overnight stimulation with IL-15 (NKIL15); and 2) expansion using the K562-mb15-41BBL cell line (NKAE), from autologous PBMNCs from patients with multiple myeloma or expansion from healthy haploidentical PBMNCs obtained from whole blood using the same previous cell line...
March 14, 2018: Transfusion
Xingxing Yu, Lingling Xu, Yingjun Chang, Xiaojun Huang, Xiangyu Zhao
The balance between immunostimulation and immunoregulation in T cell immunity is achieved by maintaining specific ratios of Th1, Th2, Th3 and Tr1 cells. Here, we investigate levels of type 1 (IFN-gamma; NK1), type 2 (IL-13; NK2), type 3 (TGF-beta; NK3) and regulatory (IL-10; NKr) cytokines in peripheral blood to assess the cytokine profiles of natural killer (NK) cells following human allogeneic hematopoietic stem cell transplantation (allo-HSCT). NK2 and NK3 cell expansion was observed after allo-HSCT; levels of NKr cells reached donor levels at day 15, though levels of NK1 cells were consistently lower than donor levels until day 60 after allo-HSCT...
March 9, 2018: Science China. Life Sciences
Paulino Alvarez, Alexandros Briasoulis
PURPOSE OF REVIEW: Immune system activation plays a central role in heart failure progression. Large-scale immune modulatory clinical trials targeting tumor necrosis factor-α and broad spectrum immune modulation have been negative. The objective of this review is to highlight past, present, and what is in the horizon for the immunomodulation in heart failure with a focus of biologics. RECENT FINDINGS: Strategies targeting interleukin-1 pathway are currently undergoing clinical evaluation and data from pilot studies are promising...
March 15, 2018: Current Treatment Options in Cardiovascular Medicine
Wen-Han Yu, Cormac Cosgrove, Christoph T Berger, Patrick C Cheney, Marina Krykbaeva, Arthur Y Kim, Lia Lewis-Ximenez, Georg M Lauer, Galit Alter
Background: Hepatitis B virus (HBV) affects up to 400 million people worldwide and accounts for approximately one million deaths per year from liver pathologies. Current treatment regimens are effective in suppressing viremia but usually have to be taken indefinitely, warranting research into new therapeutic approaches. Acute HBV infection in adults almost universally results in resolution of viremia, with the exception of immunocompromised persons, suggesting that the immune response can functionally cure or even eradicate HBV infection...
2018: Pathogens & Immunity
Lucyna Kaszubowska, Jerzy Foerster, Jan Jacek Kaczor, Daria Schetz, Tomasz Jerzy Ślebioda, Zbigniew Kmieć
Background: Natural killer cells (NK cells) are cytotoxic lymphocytes of innate immunity that reveal some immunoregulatory properties, however, their role in the process of ageing is not completely understood. The study aimed to analyze the expression of proteins involved in cellular stress response: sirtuin 1 (SIRT1), heat shock protein 70 (HSP70) and manganese superoxide dismutase (SOD2) in human NK cells with reference to the process of ageing. Non-stimulated and stimulated with IL-2, LPS or PMA with ionomycin cells originated from peripheral blood samples of: seniors aged over 85 ('the oldest'; n  = 25; 88...
2018: Immunity & Ageing: I & A
Álvaro de Mingo Pulido, Estefanía de Gregorio, Shilpi Chandra, Anna Colell, Albert Morales, Mitchell Kronenberg, Montserrat Marí
Natural killer T (NKT) cells exhibit a specific tissue distribution, displaying the liver the highest NKT/conventional T cell ratio. Upon antigen stimulation, NKT cells secrete Th1 cytokines, including interferon γ (IFNγ), and Th2 cytokines, including IL-4 that recruit and activate other innate immune cells to exacerbate inflammatory responses in the liver. Cysteine cathepsins control hepatic inflammation by regulating κB-dependent gene expression. However, the contribution of cysteine cathepsins other than Cathepsin S to NKT cell activation has remained largely unexplored...
2018: Frontiers in Immunology
Steffi De Pelsmaeker, Nicolas Romero, Massimo Vitale, Herman W Favoreel
Natural killer (NK) cells play an important role in the host response against viral infections and cancer development. They are able to kill virus-infected and tumor cells, and produce different important cytokines that stimulate the antiviral and antitumor adaptive immune response, particularly interferon gamma. NK cells are of particular importance in herpesvirus infections, which is illustrated by systemic and life-threatening herpesvirus disease symptoms in patients with deficiencies in NK cell activity, and by the myriad of reports describing herpesvirus NK cell evasion strategies...
March 14, 2018: Journal of Virology
Thenappan Thenappan, Mark L Ormiston, John J Ryan, Stephen L Archer
Pulmonary hypertension is defined as a resting mean pulmonary artery pressure of 25 mm Hg or above. This review deals with pulmonary arterial hypertension (PAH), a type of pulmonary hypertension that primarily affects the pulmonary vasculature. In PAH, the pulmonary vasculature is dynamically obstructed by vasoconstriction, structurally obstructed by adverse vascular remodeling, and pathologically non-compliant as a result of vascular fibrosis and stiffening. Many cell types are abnormal in PAH, including vascular cells (endothelial cells, smooth muscle cells, and fibroblasts) and inflammatory cells...
March 14, 2018: BMJ: British Medical Journal
Pascal Desgranges, Hicham Kobeiter, Frederic Cochennec, Vania Tacher, Joseph Touma, Marek Majewski, Jean Marzelle, Éric Allaire, Jean-Pierre Becquemin
Abdominal aortic aneurysms (AAA), also called "silent killer" as they grow without symptoms until the final rupture, are the 3rd cause of cardiovascular deaths, after myocardial infarction and stroke. Surgery is the only efficient way of preventing aortic rupture. The initial technique, described by Charles Dubost in 1952 has evolved and results and provides fair long-term results: open repair (OR) is performed under general anesthesia, via a transperitoneal or a retroperitoneal approach. Laparoscopic repair aims to reduce the consequences of surgery, but its role is still debated due to limited experience and to variable results...
March 11, 2018: La Presse Médicale
Filippo Cortesi, Gloria Delfanti, Andrea Grilli, Arianna Calcinotto, Francesca Gorini, Ferdinando Pucci, Roberta Lucianò, Matteo Grioni, Alessandra Recchia, Fabio Benigni, Alberto Briganti, Andrea Salonia, Michele De Palma, Silvio Bicciato, Claudio Doglioni, Matteo Bellone, Giulia Casorati, Paolo Dellabona
Heterotypic cellular and molecular interactions in the tumor microenvironment (TME) control cancer progression. Here, we show that CD1d-restricted invariant natural killer (iNKT) cells control prostate cancer (PCa) progression by sculpting the TME. In a mouse PCa model, iNKT cells restrained the pro-angiogenic and immunosuppressive capabilities of tumor-infiltrating immune cells by reducing pro-angiogenic TIE2+ , M2-like macrophages (TEMs), and sustaining pro-inflammatory M1-like macrophages. iNKT cells directly contacted macrophages in the PCa stroma, and iNKT cell transfer into tumor-bearing mice abated TEMs, delaying tumor progression...
March 13, 2018: Cell Reports
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