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Immunology Letters

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https://www.readbyqxmd.com/read/28322861/pharmacological-targeting-of-allergen-specific-t-lymphocytes
#1
REVIEW
Peter A Tauber, Winfried F Pickl
Allergic disorders are the result of a complex pathophysiology, involving major cellular lineages and a multitude of humoral factors of the innate and adaptive immune system, and has the tendency to involve multiple organs. Consequently, even standard pharmacological treatment of allergies is rarely specific but usually targets more than one pathway/cellular system at a time. Accordingly, many of the classic anti-allergic drugs have a critical impact also on T helper cells, which are pivotal not only during the sensitization but also the maintenance phase of allergic diseases...
March 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28322860/interleukin-37-in-endometriosis
#2
Wajih Kaabachi, Olfa Kacem, Rafik Belhaj, Agnes Hamzaoui, Kamel Hamzaoui
Interleukin-37 (IL-37) has been identified as a novel anti-inflammatory cytokine. The present study aimed to evaluate the expression of IL-37 in serum and in peritoneal fluid to determine its clinical significance in endometriosis. Enzyme-linked immunosorbent assay (ELISA) was performed to examine serum IL-37 levels in patients with endometriosis and healthy controls. Peritoneal fluid IL-37 mRNA and NFκB expression were quantified by real-time reverse transcription polymerase chain reaction assays. The association of IL-37 levels with clinical factors and prognosis of endometriosis was analysed...
March 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28300604/altered-activation-of-peripheral-cd8-t-cells-in-pediatric-crohn-s-disease
#3
Csaba Orbán, Dolóresz Szabó, Anna Bajnok, Barna Vásárhelyi, Tivadar Tulassay, András Arató, Gábor Veres, Gergely Toldi
AIM: Although Crohn's disease (CD) is an extensively investigated autoimmune condition, knowledge on early phase activation of lymphocytes, especially CD8+ Tc cells is scarce. Our aim was to investigate the calcium influx characteristics of CD8+ cells upon activation as well as the expression and function of Kv1.3 and IKCa1 lymphocyte potassium channels. METHODS: We took peripheral blood from 12 healthy controls, 23 CD children on conventional therapy and 6 severe CD children before and after infliximab therapy...
March 11, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28288805/humoral-immunity-and-autism-spectrum-disorders
#4
Keith Fluegge
Abnormal immune activation, particularly of a humoral nature, has consistently been described in the etiopathogenesis of autism spectrum disorders (ASD). In this journal, Mead and Ashwood (2015) reviewed immune abnormalities in autism and linked them to severity of classic autistic symptoms. However, there remains a lack of clarity as to how environmental risk factors in ASD may contribute to such immunophenotypes. The evidence presented herein highlights these immune deficits of a humoral nature in ASD. Moreover, aligned with prior research showing a link between chronic air pollution and suppression of humoral immunity, the author of this commentary has proposed that environmental exposure to pervasive air pollutants, particularly nitrous oxide (N2O), may target several anti-inflammatory biomarkers, including alpha 7 nicotinic acetylcholine receptor (α7nAChR) inhibition and stimulation of kappa opioid receptor (KOR) activity...
March 10, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28288804/mir-146a-potentially-promotes-ivig-mediated-inhibition-of-tlr4-signaling-in-lps-activated-human-monocytes
#5
Lionel Loubaki, Dominique Chabot, Isabelle Paré, Mathieu Drouin, Renée Bazin
IVIg is used as an immunomodulatory agent in inflammatory disorders such as sepsis. IVIg also affects monocyte differentiation and functions, two processes in which microRNAs play a crucial role. Monocytes detect microorganisms through pathogen recognition receptors (PRRs) such as TLR4. MiR-146a has been shown to supress NF-κB and IRF3 activity, two key components of TLR4 signaling. To evaluate whether miR-146a is involved in the anti-inflammatory effects of IVIg, monocytes were treated with LPS or IVIg alone or, alternately, first activated with LPS followed by washing and addition of IVIg...
March 10, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28286231/enhancing-immune-responses-to-a-dna-vaccine-encoding-toxoplasma-gondii-gra14-by-calcium-phosphate-nanoparticles-as-an-adjuvant
#6
Ehsan Ahmadpour, Shahabeddin Sarvi, Mohammad Bagher Hashemi Soteh, Mehdi Sharif, Mohammad Taghi Rahimi, Reza Valadan, Mohsen Tehrani, Alireza Khalilian, Mahbobeh Montazeri, Mahdi Fasihi-Ramandi, Ahmad Daryani
Several approaches have been used to improve the immunogenicity of DNA vaccines. In the current study, we constructed the plasmid encoding T. gondii dense granule 14 (GRA14) and investigated the immunological properties of calcium phosphate nanoparticles (CaPNs) as nano-adjuvant to enhance the protective efficacy of pcGRA14. BALB/c mice intramuscularly injected three times at two-week intervals and the immune responses were evaluated using lymphocyte proliferation assay, cytokine and antibody measurements, survival times, and parasite load of mice challenged with the virulent T...
March 9, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28286230/role-of-thymic-b-cells-in-the-development-of-thymus-derived-regulatory-t-cell-in-vitro
#7
Haider H Muhammed Ali, Adnan H Muhammed Ali, Nadzieja Drela
The thymus contains a low frequency of B cells, about 0.1-0.5% of total population of thymocytes that were shown to contribute in thymic negative selection. The fact that B cells in the periphery have been contributed in the generation of the T regulatory cell compartment emerged the idea that this process may indeed be initiated firstly within the thymus. The results of this study revealed that activated thymic B cells maintained the high percentage of nTreg generation or counteracted the decrease of this percentage observed in non-activated culture, and both activators (LPS and IMQ) have the same effect in the process of nTreg generation by B cells...
March 9, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28286229/is-initial-c-reactive-protein-level-associated-with-corticosteroid-use-in-lupus-erythematosus-patients-during-a-bacterial-infection-episode
#8
Kuo-Cheng Wang, Peng-Huei Liu, Kuang-Hui Yu, Yi-Ming Weng, Chip-Jin Ng, Te-Fa Chiu, Shou-Yen Chen
OBJECTIVE: C-reactive protein (CRP), a marker for inflammation, indicates bacterial infection in systemic lupus erythematosus (SLE) when markedly elevated. Our study investigated the association of regular corticosteroid or immunosuppressant use with initial CRP level in febrile SLE patients with bacterial infection. METHODS: This retrospective cohort study included adult SLE patients (18 years of age or older) who presented with fever at the emergency department from January 2008 to December 2012...
March 9, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28286228/the-smac-mimetic-birinapant-attenuates-lipopolysaccharide-induced-liver-injury-by-inhibiting-the-tumor-necrosis-factor-receptor-associated-factor-3-degradation-in-kupffer-cells
#9
Hongxiang Liu, Rui Liao, Kun He, Xiwen Zhu, Peizhi Li, Jianping Gong
It was demonstrated that second mitochondria-derived activator of caspases (SMAC) mimetic inhibites tumor necrosis factor receptor-associated factor 3 (TRAF3) degradation and the mitogen-activated protein kinase (MAPK) signaling pathway activation induced by lipopolysaccharide (LPS) in vitro. However, the effect of Smac mimetic in vivo is not clear. The present study was to investigate the role of Smac mimetic in LPS-induced liver injury in mice and its possible mechanism. An animal model of LPS-induced liver injury was established by intraperitoneally injecting mice with 10mg/kg LPS pretreatment with or without Smac mimetic birinapant (30mg/kg body weight)...
March 9, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28279700/molecular-and-immunohistochemical-expression-of-apoptotic-proteins-bax-bcl-2-and-caspase-3-in-infantile-hemangioma-tissues-as-an-effect-of-propranolol-treatment
#10
Aneta Wnęk, Ewa Andrzejewska, Józef Kobos, Katarzyna Taran, Przemysław Przewratil
BACKGROUND: Infantile hemangiomas (IHs) are the most common benign tumors of childhood. They are characterized by a unique clinical course with two phases, proliferation and involution, which are followed by regression. The therapy of infantile hemangiomas was revolutionized in 2008 by the introduction of propranolol, however, the mechanism of its influence on hemangiomas remains unclear. METHODS: The study included 71 patients with IHs, 27 of whom were treated with propranolol while the remaining 44 were used as a comparative group...
March 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28274795/anthropological-analysis-of-tunisian-populations-as-inferred-from-hla-class-i-and-class-ii-genetic-diversity-a-meta-analysis
#11
Abdelhafidh Hajjej, Wassim Y Almawi, Lasmar Hattab, Slama Hmida
Despite their importance, anthropological meta-analyses which allow for comprehensive evaluation of the relationships of a given population were rare. This meta-analysis evaluates the origin of Tunisians using polymorphic profile of HLA class I (A, B), and class II (DRB1, DQB1) genes, in historical, social and cultural context, and is the only analysis in the Middle East-North Africa (MENA) region. A total of 20 eligible populations were selected from several databases, and included representing 2553 Tunisian individuals, who were compared with Mediterranean and sub-Saharan populations...
March 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28274793/pkk-deficiency-in-b-cells-prevents-lupus-development-in-sle-lupus-mice
#12
D Oleksyn, J Zhao, A Vosoughi, J C Zhao, R Misra, A P Pentland, D Ryan, J Anolik, C Ritchlin, J Looney, A P Anandarajah, G Schwartz, L M Calvi, M Georger, C Mohan, I Sanz, L Chen
Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by the production of autoantibodies that can result in damage to multiple organs. It is well documented that B cells play a critical role in the development of the disease. We previously showed that protein kinase C associated kinase (PKK) is required for B1 cell development as well as for the survival of recirculating mature B cells and B-lymphoma cells. Here, we investigated the role of PKK in lupus development in a lupus mouse model...
March 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28274792/prospective-study-of-percutaneous-cryoablation-combined-with-allogenic-nk-cell-immunotherapy-for-advanced-renal-cell-cancer
#13
Mao Lin, Kecheng Xu, Shuzhen Liang, Xiaohua Wang, Yinqing Liang, Mingjie Zhang, Jibing Chen, LiZhi Niu
In this study, the clinical efficacy of cryosurgery combined with allogenic NK cell immunotherapy for advanced renal cell cancer was evaluated. From July to December 2016, we enrolled 60 patients who met the enrollment criteria and divided them into two groups: (1) the simple cryoablation group (n=30); and (2) the cryoablation combined with allogenic NK cells group (n=30). The clinical efficacy, quality of life, immune function, and other related indicators were evaluated. Combining allogeneic NK cells with cryoablation had a synergistic effect, not only enhancing the immune function and improving the quality of life of the patients, but also significantly exhibiting good clinical efficacy of the patients...
March 6, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28274794/understanding-memory-cd8-t-cells
#14
REVIEW
Tasleem Samji, Khanna Kamal M
Memory CD8(+) T cells were originally thought to exist as two populations (effector and central memory). In recent years, a third population called resident memory T cells has been discovered and further to this these populations are being divided into different subtypes. Understanding the function and developmental pathways of memory CD8(+) T cells is key to developing effective therapies against cancer and infectious diseases. Here we have reviewed what is currently known about all three subsets of memory CD8(+) T populations and as to how each population was originally discovered and the developmental pathways of each subpopulation...
March 5, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28237848/il-17-axis-accelerates-the-inflammatory-progression-of-obese-in-mice-via-tbk1-and-ikbke-pathway
#15
Seung Hoon Lee, JooYeon Jhun, Jae-Kyung Byun, Eun-Kyung Kim, KyoungAh Jung, Ji Eun Lee, Jong Young Choi, Sung-Hwan Park, Mi-La Cho
Obesity mediates immune inflammatory response and induces IL-17 expression. Adipgenesis can be regulated by IL-17 and it causes TBK1 activation. The inhibition of TBK1 and the inhibition of I IKBKE reduces inflammatory response and improves obesity. It is hypothesized that IL-17 deficiency inhibits obesity progression and inflammation. 3T3-L1 preadipocytes were differentiated in vitro and treated with IL-17. RAW264.7 cells and differentiated 3T3-L1 were pretreated with TBK1 inhibitor and then stimulated with IL-17...
February 22, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28235552/t-helper-cells-in-leprosy-an-update
#16
REVIEW
Chaman Saini, Mohd Tarique, Reeta Rai, Anisuddin Siddiqui, Neena Khanna, Alpana Sharma
Leprosy is an ancient disease caused by gram positive, rod shaped bacilli called Mycobacterium leprae. Patients present with varied clinico-pathological disease depending on the host immune response to Mycobacterium leprae. Thus tuberculoid (TT) and lepromatous (LL) patients represent two ends of a spectrum where the former shows limited disease, high T cell mediate immune (CMI) response and low antibody (HI) levels in serum. In contrast the latter has low T cell and high humoral immune response i.e antibody levels...
February 21, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28219676/a-master-role-for-neutrophils-in-kawasaki-syndrome
#17
LETTER
Laura Andreozzi, Benedetta Bracci, Francesca D'Errico, Donato Rigante
No abstract text is available yet for this article.
February 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28216261/modulating-the-function-of-the-immune-system-by-thyroid-hormones-and-thyrotropin
#18
REVIEW
Evelyn L Jara, Natalia Muñoz-Durango, Carolina Llanos, Carlos Fardella, Pablo A González, Susan M Bueno, Alexis M Kalergis, Claudia A Riedel
Accumulating evidence suggests a close bidirectional communication and regulation between the neuroendocrine and immune systems. Thyroid hormones (THs) can exert responses in various immune cells, e.g., monocytes, macrophages, natural killer cells, and lymphocytes, affecting several inflammation-related processes (such as, chemotaxis, phagocytosis, reactive oxygen species generation, and cytokines production). The interactions between the endocrine and immune systems have been shown to contribute to pathophysiological conditions, including sepsis, inflammation, autoimmune diseases and viral infections...
February 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28216262/efis-lecture-understanding-the-ctla-4-checkpoint-in-the-maintenance-of-immune-homeostasis
#19
REVIEW
Lucy S K Walker
The past 20 years have heralded fascinating developments in the field of CTLA-4 biology. The CTLA-4 protein is a critical negative regulator of T cell immunity and its absence provokes severe lymphoproliferative disease. In a surprising twist, the generation of mixed bone marrow chimeric mice revealed that CTLA-4 predominantly functions in a cell-extrinsic manner, suggesting that CTLA-4 expressed on one cell can modify the behaviour of another cell. This was followed by the demonstration that CTLA-4 is highly expressed in regulatory T cells and can contribute to their suppressive activity...
February 16, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28216260/optimal-expression-of-a-fab-effector-fusion-protein-in-escherichia-coli-by-removing-the-cysteine-residues-responsible-for-an-interchain-disulfide-bond-of-a-fab-molecule
#20
Hyeon-Ju Kang, Hye-Jin Kim, Mun-Sik Jung, Jae-Kyu Han, Sang-Hoon Cha
Development of novel bi-functional or even tri-functional Fab-effector fusion proteins would have a great potential in the biomedical sciences. However, the expression of Fab-effector fusion proteins in Escherichia coli is problematic especially when a eukaryotic effector moiety is genetically linked to a Fab due to the lack of proper chaperone proteins and an inappropriate physicochemical environment intrinsic to the microbial hosts. We previously reported that a human Fab molecule, referred to as SL335, reactive to human serum albumin has a prolonged in vivo serum half-life in rats...
February 16, 2017: Immunology Letters
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