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https://www.readbyqxmd.com/read/29456638/biobran-mgn-3-an-arabinoxylan-rice-bran-enhances-nk-cell-activity-in-geriatric-subjects-a-randomized-double-blind-placebo-controlled-clinical-trial
#1
Ahmed F Elsaid, Magda Shaheen, Mamdooh Ghoneum
Aging is associated with a decline in natural killer (NK) and natural killer T (NKT) cell function that may contribute to increased susceptibility to malignancy and infection. A preliminary investigation was conducted examining the hypothesis that arabinoxylan rice bran (Biobran/MGN-3), a denatured hemicellulose with known immunomodulatory activity, could counteract this decline in NK/NKT cell activity in geriatrics. A total of 12 healthy geriatric subjects of both sexes and over 56 years old, participated in a randomized, double-blind, placebo-controlled clinical trial...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29448959/impaired-t-cell-mediated-hepatitis-in-peroxisome-proliferator-activated-receptor-alpha-ppar%C3%AE-deficient-mice
#2
Ian N Hines, Michael Kremer, Sherri M Moore, Michael D Wheeler
BACKGROUND: Peroxisome proliferator activated receptor alpha (PPARα), a regulator of enzymes involved in β oxidation, has been reported to influence lymphocyte activation. The purpose of this study was to determine whether PPARα plays a role in T cell-mediated hepatitis induced by Concanavalin A (ConA). METHODS: Wild type (wt) or PPARα-deficient (PPARα -/- ) mice were treated with ConA (15 mg/kg) by intravenous injection 0, 10 or 24 h prior to sacrifice and serum and tissue collection for analysis of tissue injury, cytokine response, T cell activation and characterization...
February 15, 2018: Biological Research
https://www.readbyqxmd.com/read/29434775/il-25-promotes-th2-bias-by-upregulating-il-4-and-il-10-expression-of-decidual-%C3%AE-%C3%AE-t-cells-in-early-pregnancy
#3
Yuan Zhang, Ying Wang, Ming-Qing Li, Jie Duan, Deng-Xuan Fan, Li-Ping Jin
Decidual immune cells (DICs), consisting of both innate and adaptive immune cells, have a pivotal role in maintaining immune tolerance for normal pregnancy. Our previous study demonstrated that interleukin (IL)-25 stimulates the proliferation of decidual stromal cells (DSCs) in an autocrine manner. However, the role of IL-25 in functional regulation of DICs is largely unknown. Flow cytometry was used to analyze the expression of IL-25 and its receptor (IL-17RB) in DICs, and the effect of IL-25 on the expression of Ki-67, IL-4, IL-10, interferon (IFN)-γ and transforming growth factor (TGF)-β in decidual γδT cells...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29431692/development-of-asthma-in-inner-city-children-possible-roles-of-mait-cells-and-variation-in-the-home-environment
#4
Shilpi Chandra, Gerhard Wingender, Jason A Greenbaum, Archana Khurana, Amin M Gholami, Anusha-Preethi Ganesan, Michael Rosenbach, Katy Jaffee, James E Gern, Robert Wood, George O'Connor, Megan Sandel, Meyer Kattan, Leonard Bacharier, Alkis Togias, Anthony A Horner, Mitchell Kronenberg
Humans have populations of innate-like T lymphocytes with an invariant TCR α-chain that recognize nonpeptide Ags, including invariant NKT (iNKT) cells and mucosal-associated invariant T (MAIT) cells. iNKT cell involvement in human asthma is controversial, whereas there has been little analysis of MAIT cells. Using peripheral blood cells from 110 participants from the Urban Environment and Childhood Asthma (URECA) birth cohort study, these cells were analyzed for number and function. We determined whether iNKT cell or MAIT cell frequency at 1 y is correlated with the cytokine polarization of mainstream CD4+ T cells and/or the development of asthma by age 7 y...
February 5, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29423731/hiv-persistence-in-adipose-tissue-reservoirs
#5
REVIEW
Jacob Couturier, Dorothy E Lewis
PURPOSE OF REVIEW: The purpose of this review is to examine the evidence describing adipose tissue as a reservoir for HIV-1 and how this often expansive anatomic compartment contributes to HIV persistence. RECENT FINDINGS: Memory CD4 T cells and macrophages, the major host cells for HIV, accumulate in adipose tissue during HIV/SIV infection of humans and rhesus macaques. Whereas HIV and SIV proviral DNA is detectable in CD4 T cells of multiple fat depots in virtually all infected humans and monkeys examined, viral RNA is less frequently detected, and infected macrophages may be less prevalent in adipose tissue...
February 9, 2018: Current HIV/AIDS Reports
https://www.readbyqxmd.com/read/29419749/deficiency-of-invariant-natural-killer-t-cells-does-not-protect-against-obesity-but-exacerbates-atherosclerosis-in-ldlr-mice
#6
Savitha Subramanian, Leela Goodspeed, Shari Wang, Yilei Ding, Kevin D O'Brien, Godfrey S Getz, Alan Chait, Catherine A Reardon
Obesity is a chronic inflammatory state characterized by altered levels of adipose tissue immune cell populations. Natural killer T (NKT) cells are CD1d restricted lymphocyte subsets that recognize lipid antigens whose level decreases in obese adipose tissue. However, studies in mice with deficiency or increased levels of NKT cells have yielded contradictory results, so the exact role of these cells in obesity and adipose tissue inflammation is not yet established. We previously showed that Ldlr-/- mice with excess invariant NKT (iNKT) cells demonstrate significant weight gain, adiposity, metabolic abnormalities, and atherosclerosis...
February 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29409843/t-cell-dysfunction-and-patient-age-are-associated-with-poor-outcomes-after-mechanical-circulatory-support-device-implantation
#7
Joanna M Schaenman, Maura Rossetti, Yael Korin, Tiffany Sidwell, Victoria Groysberg, Emily Liang, Sitaram Vangala, Nicholas Wisniewski, Eleanor Chang, Maral Bakir, Galyna Bondar, Martin Cadeiras, Murray Kwon, Elaine F Reed, Mario Deng
Immunologic impairment may contribute to poor outcomes after implantation of mechanical circulatory support device (MCSD), with infection often as a terminal event. The study of immune dysfunction is of special relevance given the growing numbers of older patients with heart disease. The aim of the study was to define which immunologic characteristics are associated with development of adverse clinical outcomes after MCSD implantation. We isolated peripheral blood mononuclear cells (PBMC) from patients pre- and up to 20 days post-MCSD implantation and analyzed them by multiparameter flow cytometry for T cell dysfunction, including terminal differentiation, exhaustion, and senescence...
January 31, 2018: Human Immunology
https://www.readbyqxmd.com/read/29406905/autoimmunity-in-multiple-sclerosis-role-of-sphingolipids-invariant-nkt-cells-and-other-immune-elements-in-control-of-inflammation-and-neurodegeneration
#8
REVIEW
Maria Podbielska, Joan O'Keeffe, Edward L Hogan
Multiple sclerosis (MS) is the most common demyelinating disease of the central nervous system. It is classified as being an autoimmune response in the genetically susceptible individual to a persistent but unidentified antigen(s). Both the adaptive and the innate immune systems are likely to contribute significantly to MS pathogenesis. This review summarizes current understanding of the characteristics of MS autoimmunity in the initiation and progression of the disease. In particular we find it timely to classify the autoimmune responses by focusing on the immunogenic features of myelin-derived lipids in MS including molecular mimicry; on alterations of bioactive sphingolipids mediators in MS; and on functional roles for regulatory effector cells, including innate lymphocyte populations, like the invariant NKT (iNKT) cells which bridge adaptive and innate immune systems...
February 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29405723/decline-in-peripheral-blood-nkg2d-cd3-cd56-nkt-cells-in-metastatic-colorectal-cancer-patients
#9
M Gharagozloo, A Rezaei, H Kalantari, A Bahador, N Hassannejad, M Maracy, N Nouri, M Sedghi, H Ghazanfari, B Bayat
OBJECTIVE: Colorectal cancer (CRC) is one of the main causes of cancer deaths in the world. This cancer can be divided into non-metastatic and metastatic CRC stages. CD3+CD56+ NKT cell subsets are a minor T cell subset in peripheral blood and conduct the killing of tumor cells in direct manner. Little is obvious about levels and surface markers of these cells such as NKG2D in different cancers, especially in CRC. METHODS: We included 15 non-metastatic (low-grade), 11 non-metastatic (high-grade), 10 metastatic colorectal cancer patients and 18 healthy controls...
2018: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29393499/small-heterodimer-partner-deficiency-exacerbates-binge-drinking%C3%A2-induced-liver-injury-via-modulation-of-natural-killer-t-cell-and-neutrophil-infiltration
#10
Min-Jeong Go, Jung-Ran Noh, Jung Hwan Hwang, Kyoung-Shim Kim, Dong-Hee Choi, Jong-Soo Lee, Yong-Hoon Kim, Chul-Ho Lee
Binge drinking among alcohol consumers is a common occurrence, and may result in the development of numerous diseases, including liver disorders. It has previously been reported that natural killer T (NKT) cells induce alcohol‑associated liver injury by promoting neutrophil infiltration. In the present study, the role of the orphan nuclear receptor small heterodimer partner (SHP), which is encoded by the NR0B2 gene, in acute binge drinking‑induced liver injury was investigated. SHP‑knockout (KO) and wild‑type (WT) control mice were intragastrically administered single doses of alcohol...
January 26, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29390153/il-21-regulates-nk-cell-responses-during-mycobacterium-tuberculosis-infection
#11
Padmaja Paidipally, Deepak Tripathi, Abhinav Van, Rajesh Kumar Radhakrishnan, Rohan Dhiman, Sambasivan Venkatasubramanian, Kamakshi P Devalraju, Amy R Tvinnereim, Vijaya Lakshmi Valluri, Ramakrishna Vankayalapati
In the current study, we determined the effects of interleukin (IL)-21 on human natural killer (NK) cells and monocyte responses during Mycobacterium tuberculosis (Mtb) infection. We found that Mtb stimulated CD4+ and NKT cells from healthy individuals with latent tuberculosis infection (LTBI+) are major sources of IL-21. CD4+ cells from tuberculosis patients secreted less IL-21 than did CD4+ cells from healthy LTBI+ individuals. IL-21 had no direct effect on Mtb stimulated monocytes. IL-21 activated NK cells produced IFN-γ, perforin, granzyme B and granulysin; lysed Mtb infected monocytes; and reduced Mtb growth...
January 30, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29389901/the-janus-face-of-nkt-cell-function-in-autoimmunity-and-infectious-diseases
#12
REVIEW
Alessandra Torina, Giuliana Guggino, Marco Pio La Manna, Guido Sireci
Natural killer T cells (NKT) are a subset of T lymphocytes bridging innate and adaptive immunity. These cells recognize self and microbial glycolipids bound to non-polymorphic and highly conserved CD1d molecules. Three NKT cell subsets, type I, II, and NKT-like expressing different antigen receptors (TCR) were described and TCR activation promotes intracellular events leading to specific functional activities. NKT can exhibit different functions depending on the secretion of soluble molecules and the interaction with other cell types...
February 1, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29378774/cd1d-mediated-lipid-presentation-by-cd11c-cells-regulates-intestinal-homeostasis
#13
Julia Sáez de Guinoa, Rebeca Jimeno, Mauro Gaya, David Kipling, María José Garzón, Deborah Dunn-Walters, Carles Ubeda, Patricia Barral
Intestinal homeostasis relies on a continuous dialogue between the commensal bacteria and the immune system. Natural killer T (NKT) cells, which recognize CD1d-restricted microbial lipids and self-lipids, contribute to the regulation of mucosal immunity, yet the mechanisms underlying their functions remain poorly understood. Here, we demonstrate that NKT cells respond to intestinal lipids and CD11c+ cells (including dendritic cells (DCs) and macrophages) are essential to mediate lipid presentation within the gut ultimately controlling intestinal NKT cell homeostasis and activation...
January 29, 2018: EMBO Journal
https://www.readbyqxmd.com/read/29363849/impact-of-th1-th2-cytokine-polarity-induced-by-invariant-nkt-cells-on-the-incidence-of-pregnancy-loss-in-mice
#14
Mari Hoya, Takeshi Nagamatsu, Tatsuya Fujii, Danny J Schust, Hiroko Oda, Naoya Akiba, Takayuki Iriyama, Kei Kawana, Yutaka Osuga, Tomoyuki Fujii
OBJECTIVE: This study aimed to investigate the association of Th1/Th2 polarity induced by CD1d-restricted invariant natural killer T (iNKT) cells with pregnancy outcome. METHODS: Two types of iNKT cell stimulants with different cytokine induction properties, alpha-galactosylceramide (AGC; Th1-biased inducer), and a sphingosine-truncated derivative of AGC (OCH; Th2-biased inducer) were administered to pregnant mice on day 9.5 post-coitus (pc), and the incidence of pregnancy loss was evaluated...
January 24, 2018: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29363173/mait-cells-an-historical-and-evolutionary-perspective
#15
REVIEW
Olivier Lantz, François Legoux
In humans, MAIT cells represent the most abundant T-cell subset reacting against bacteria. MAIT cells belong to the evolutionarily conserved family of "preset" T cells that includes also NKT cells. Both subsets are selected by double positive thymocytes leading to common features such as PLZF expression. Preset T cells correspond to subsets prepositioned in specific tissue locations with preprogrammed versatile effector functions such as antimicrobial functions and possibly also metabolic control and tissue repair activity...
December 27, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29355515/spliceosome-associated-protein-130-exacerbates-alcohol-induced-liver-injury-by-inducing-nlrp3-inflammasome-mediated-il1%C3%AE-in-mice
#16
Jong Won Kim, Yoon-Seok Roh, Hyeneui Jeong, Ho-Keun Yi, Min-Ho Lee, Chae Woong Lim, Bumseok Kim
Excessive alcohol consumption leads to chronic liver diseases. Macrophage-inducible C-type lectin (Mincle) is a C-type lectin receptor that recognizes spliceosome-associated protein 130 (SAP130) known as an endogenous ligand released from dying cells. Our aim was to examine the role of Mincle-SAP130 in the pathogenesis of alcoholic liver disease. Alcohol-induced liver injury was induced in wild-type (WT) and Mincle knout-out (KO) mice using a chronic-binge ethanol-feeding model. Mincle KO mice showed significant lower hepatic steatosis, inflammation with neutrophil infiltration, and fibrosis compared to WT mice after alcohol feeding...
January 16, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29352737/bronchiolitis-obliterans-syndrome-is-associated-with-increased-p-glycoprotein-expression-and-loss-of-glucocorticoid-receptor-from-steroid-resistant-pro-inflammatory-cd8-t-cells
#17
Greg Hodge, Sandra Hodge, Phan Tien Nguyen, Aeneas Yeo, Parama Sarkar, Arash Badiei, C L Holmes-Liew, Paul N Reynolds, Mark Holmes
Immunosuppressive therapy fails to suppress the production of pro-inflammatory cytokines, particularly by CD8+T cells, in stable lung transplant recipients and those undergoing chronic rejection, suggesting that some patients may become relatively resistant to immunosuppressants such as glucocorticoids (GC). We have shown loss of GC receptor (GCR) from the CD8+ cells, and we hypothesized that the drug membrane efflux pump, p-glycoprotein-1 (Pgp), may also be involved in lymphocyte steroid resistance following lung transplant...
January 20, 2018: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29352371/innate-and-adaptive-t-cells-in-influenza-disease
#18
REVIEW
Simone Nüssing, Sneha Sant, Marios Koutsakos, Kanta Subbarao, Thi H O Nguyen, Katherine Kedzierska
Influenza is a major global health problem, causing infections of the respiratory tract, often leading to acute pneumonia, life-threatening complications and even deaths. Over the last seven decades, vaccination strategies have been utilized to protect people from complications of influenza, especially groups at high risk of severe disease. While current vaccination regimens elicit strain-specific antibody responses, they fail to generate cross-protection against seasonal, pandemic and avian viruses. Moreover, vaccines designed to generate influenza-specific T-cell responses are yet to be optimized...
January 20, 2018: Frontiers of Medicine
https://www.readbyqxmd.com/read/29351991/differing-roles-of-cd1d2-and-cd1d1-proteins-in-type-i-natural-killer-t-cell-development-and-function
#19
Srinivasan Sundararaj, Jingjing Zhang, S Harsha Krovi, Romain Bedel, Kathryn D Tuttle, Natacha Veerapen, Gurdyal S Besra, Yogesh Khandokar, T Praveena, Jérôme Le Nours, Jennifer L Matsuda, Jamie Rossjohn, Laurent Gapin
MHC class I-like CD1 molecules have evolved to present lipid-based antigens to T cells. Differences in the antigen-binding clefts of the CD1 family members determine the conformation and size of the lipids that are presented, although the factors that shape CD1 diversity remain unclear. In mice, two homologous genes, CD1D1 and CD1D2, encode the CD1d protein, which is essential to the development and function of natural killer T (NKT) cells. However, it remains unclear whether both CD1d isoforms are equivalent in their antigen presentation capacity and functions...
January 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29348503/nkt-cells-aid-antiviral-responses
#20
Laurie A Dempsey
No abstract text is available yet for this article.
January 18, 2018: Nature Immunology
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