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https://www.readbyqxmd.com/read/29141217/th1-like-plasmodium-specific-memory-cd4-t-cells-support-humoral-immunity
#1
Ryan A Zander, Rahul Vijay, Angela D Pack, Jenna J Guthmiller, Amy C Graham, Scott E Lindner, Ashley M Vaughan, Stefan H I Kappe, Noah S Butler
Effector T cells exhibiting features of either T helper 1 (Th1) or T follicular helper (Tfh) populations are essential to control experimental Plasmodium infection and are believed to be critical for resistance to clinical malaria. To determine whether Plasmodium-specific Th1- and Tfh-like effector cells generate memory populations that contribute to protection, we developed transgenic parasites that enable high-resolution study of anti-malarial memory CD4 T cells in experimental models. We found that populations of both Th1- and Tfh-like Plasmodium-specific memory CD4 T cells persist...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29140829/guiding-regulatory-t-cells-to-the-allograft
#2
Caroline Lamarche, Megan K Levings
PURPOSE OF REVIEW: The application of regulatory T cell (Treg) therapy in organ transplantation is actively being pursued using unmodified, typically polyclonal cells. As the results of these ongoing clinical trials emerge, it is time to plan the next wave of clinical trials of Tregs. Here we will review a key strategy to improve Treg effectiveness and reduce side effects, namely increasing Treg specificity - both in terms of antigen recognition and localization to the allograft. RECENT FINDINGS: Study of chemokine signatures accompanying acute rejection has revealed several chemokines that could be targeted to increase Treg homing...
November 14, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/29140452/mechanical-ventilation-induces-il-4-secretion-in-lungs-and-reduces-the-phagocytic-capacity-of-lung-macrophages
#3
Kenny Bielen, Bart 's Jongers, Jan Boddaert, Christine Lammens, Philippe G Jorens, Surbhi Malhotra-Kumar, Herman Goossens, Samir Kumar-Singh
Patients receiving mechanical ventilation are at risk of developing ventilator-associated pneumonia. Here, we show that clinically utilized ventilation protocols in rat with 5 or 8 mL/kg tidal volumes cause increased IL-4 expression, lowered ratio of TH1:TH2 transcriptional factors (Tbet:Gata3) and increased arginase1-positive (Arg1+) macrophages and eosinophils in lungs. Macrophages from ventilated lungs had reduced ex vivo capacity towards phagocytosing bacteria. Ventilated animals, when further challenged with bacterial pneumonia, continued to show persistence of Arg1+ M2 macrophages as well as an increased bacterial burden compared to spontaneously breathing animals receiving the same bacterial dose...
November 13, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29139122/vaccination-with-human-amniotic-epithelial-cells-confer-effective-protection-in-a-murine-model-of-colon-adenocarcinoma
#4
M Tabatabaei, N Mosaffa, R Ghods, S Nikoo, S Kazemnejad, M Khanmohammadi, E Mirzadeghan, A Mahmoudi, M R Bolouri, R Falak, B Keshavarzi, M Ramezani, A H Zarnani
In spite of being the star of therapeutic strategies for cancer treatment, the results of immunotherapeutic approaches are still far from expectations. In this regard, primary prevention of cancer using prophylactic cancer vaccines has gained considerable attention. The immunologic similarities between cancer development and placentation have helped researchers to unravel molecular mechanisms responsible for carcinogenesis and to take advantage of stem cells from reproductive organs to elicit robust anti-cancer immune responses...
November 15, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29138867/effect-of-xanthohumol-on-th1-th2-balance-in-a-breast-cancer-mouse-model
#5
Wenchao Zhang, Yanlong Pan, Panhong Gou, Cheng Zhou, Lianqing Ma, Qiming Liu, Yuping Du, Jinbo Yang, Qin Wang
Xanthohumol (XN), a prenylflavonoid found in the hop plant, Humulus lupulus, exhibits a variety of biological activities. Numerous studies have reported that XN inhibits the growth of many types of cancer cells, but the effects of XN on tumor immunity have not yet been studied. We explored the effect of XN on Th1/Th2 balance and the underlying mechanism based on a BALB/c-4T1 breast cancer mouse model. The results showed that XN significantly slowed down tumor growth and inhibited expression of antitumor proliferation protein Ki-67 as well as breast cancer-specific marker cancer antigen 15-3 (CA15-3)...
November 13, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29137933/cd4-t-cell-differentiation-in-chronic-viral-infections-the-tfh-perspective
#6
REVIEW
Laura A Vella, Ramin S Herati, E John Wherry
CD4(+) T cells play a critical role in the response to chronic viral infections during the acute phase and in the partial containment of infections once chronic infection is established. As infection persists, the virus-specific CD4(+) T cell response begins to shift in phenotype. The predominant change described in both mouse and human studies of chronic viral infection is a decrease in detectable T helper type (Th)1 responses. Some Th1 loss is due to decreased proliferative potential and decreased cytokine production in the setting of chronic antigen exposure...
November 11, 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/29137646/the-potential-of-interleukin-37-as-an-effective-therapeutic-agent-in-asthma
#7
REVIEW
Lina Zhang, Jie Zhang, Peng Gao
Interleukin (IL)-37 belongs to the IL-1 cytokine family. It binds to IL-18Rα and recruits the orphan decoy IL-1R8. Emerging evidence shows that IL-37 is a key player in the regulation of inflammation, cellular differentiation, and proliferation. Altered IL-37 expression has been demonstrated in many inflammatory disease conditions, including asthma. In rheumatoid arthritis, IL-37 is involved in the regulation of proliferation, production of inflammatory mediators, and activation of inflammatory cells. Furthermore, this cytokine acts as a negative regulator of inflammation in inflammatory bowel disease...
November 14, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29137359/granulysin-expressed-in-a-humanized-mouse-model-induces-apoptotic-cell-death-and-suppresses-tumorigenicity
#8
Ya-Wen Hsiao, Tsung-Ching Lai, Yu-Hsiang Lin, Chia-Yi Su, Jih-Jong Lee, Albert Taiching Liao, Yuan-Feng Lin, Shu-Chen Hsieh, Alexander T H Wu, Michael Hsiao
Granulysin (GNLY) is a cytolytic and proinflammatory protein expressed in activated human cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells. Conventional mouse models cannot adequately address the triggering mechanism and immunopathological pathways in GNLY-associated diseases due to lack of the GNLY gene in the mouse genome. Therefore, we generated a humanized immune system (HIS) mouse model by transplanting human umbilical cord blood mononuclear cells into NOD.Cg-Prkdc(scid) Il2rg(tm1Wjl) /SzJ (NSG) mice after sublethally irradiation...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137294/immunoprevention-of-kras-driven-lung-adenocarcinoma-by-a-multipeptide-vaccine
#9
Jing Pan, Qi Zhang, Shizuko Sei, Robert H Shoemaker, Ronald A Lubet, Yian Wang, Ming You
Lung cancer remains the leading cause of cancer death worldwide. Mutations in KRAS are detected in up to 30% of lung cancer cases. No effective therapies specifically targeting mutant KRAS have been developed. Vaccination against KRAS mutants is one of the venues of active exploration. The present study evaluated both immunogenicity and antitumor efficacy of a newly formulated multipeptide vaccine targeting multiple epitopes of the KRAS molecule. The formulated vaccine contained top four peptides, which elicited the strongest immunologic response and showed 100% sequence homology between human and mouse...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137272/immunological-cytokine-profiling-identifies-tnf-%C3%AE-as-a-key-molecule-dysregulated-in-autistic-children
#10
Jiang Xie, Li Huang, Xiaohong Li, Hua Li, Yongmei Zhou, Hua Zhu, Tianying Pan, Keith M Kendrick, Wenming Xu
Recent studies have suggested that the etiology of autism spectrum disorder (ASD) may be caused by immunological factors, particularly abnormalities in the innate immune system. However, it is still unclear which specific cytokines may be of most importance. The current study therefore investigated which cytokines showed altered concentrations in blood in ASD compared with healthy control children and which were also correlated with symptom severity. Our study sample included 32 children diagnosed with ASD and 28 age and sex-matched typically developing children...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29133889/oral-exposure-to-dibutyl-phthalate-exacerbates-chronic-lymphocytic-thyroiditis-through-oxidative-stress-in-female-wistar-rats
#11
Yang Wu, Jinquan Li, Biao Yan, Yuqing Zhu, Xudong Liu, Mingqing Chen, Dai Li, Ching-Chang Lee, Xu Yang, Ping Ma
Chronic lymphocytic thyroiditis (CLT) is a common autoimmune disorder. The possible pathogenic role and mechanism of dibutyl phthalate (DBP) in CLT is still controversial. Experiments were conducted after 35-days of oral exposure to the three concentrations of DBP or saline, and three immunizations with thyroglobulin (TG). Healthy female Wistar rats were randomly divided into ten exposure groups (n = 8 each): (A) saline control, (B) 0.5 mg/kg/d DBP, (C) 5 mg/kg/d DBP, (D) 50 mg/kg/d DBP, (E) TG-immunized group, (F) TG- combined with 0...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133249/immunomodulation-of-dual-specificity-phosphatase-4-during-visceral-leishmaniasis
#12
Shabina Parveen, Atish Roy Chowdhury, Junaid Jibran Jawed, Suchandra Bhattacharyya Majumdar, Bhaskar Saha, Subrata Majumdar
DUSP4, an inducible protein has a substrate specificity toward ERK1/2, a component of MAP kinase which is enhanced during Leishmania infection. The DUSP4(-/-) mice show increased susceptibility towards the infection caused by Toxoplasma gondii and Leishmania mexicana. These observations emphatically established the fact that unlike DUSP1, DUSP4 has host protective role. In our study, it has been Leishmania donovani, the causative agent of visceral leishmaniasis (VL) significantly reduced the expression of DUSP4 during infection...
November 10, 2017: Microbes and Infection
https://www.readbyqxmd.com/read/29132870/mtor-inhibitor-rapamycin-induce-polymorphonuclear-myeloid-derived-suppressor-cells-mobilization-and-function-in-protecting-against-acute-graft-versus-host-disease-after-bone-marrow-transplantation
#13
Yu Lin, Binsheng Wang, Wei Shan, Yamin Tan, Jingjing Feng, Lin Xu, Limengmeng Wang, Biqing Han, Mingming Zhang, Jian Yu, Xiaohong Yu, He Huang
The mammalian target of rapamycin (mTOR) inhibitor rapamycin (RAPA) has been shown to be an effective immunosuppressor in the management of acute graft-versus-host disease (aGVHD) after bone marrow transplantation. Myeloid-derived suppressor cells (MDSCs) also have a protective effect in aGVHD regulation. However, the relationship between RAPA and MDSCs in aGVHD models is unclear. Meanwhile, the effect of RAPA on different subgroups of MDSCs is also less well described. In this study, we demonstrate that in vivo administration of RAPA results in the expansion and functional enhancement of polymorphonuclear MDSCs (PMN-MDSCs) in a murine model of aGVHD...
November 10, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29132838/therapeutic-effects-of-diosgenin-in-experimental-autoimmune-encephalomyelitis
#14
Weili Liu, Mei Zhu, Zhongwang Yu, Dou Yin, Fengfeng Lu, Yingyan Pu, Chao Zhao, Cheng He, Li Cao
Multiple sclerosis (MS) is a chronic autoimmune demyelinating disease of the central nervous system. Currently, there is no drug available to cure this kind of disease. Diosgenin is a plant-derived steroid saponin. A previous study in our lab revealed that diosgenin can promote oligodendrocyte progenitor cell differentiation and accelerate remyelination. In the present study, we found that diosgenin dose-dependently alleviated the progression of experimental autoimmune encephalomyelitis with reduced central nervous system inflammation and demyelination...
October 31, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29132406/sjcrt-a-recombinant-schistosoma-japonicum-calreticulin-induces-maturation-of-dendritic-cells-and-a-th1-polarized-immune-response-in-mice
#15
Lizhen Ma, Dandan Li, Chunxiu Yuan, Xiangqian Zhang, Na Ta, Xiaochao Zhao, Yumei Li, Xingang Feng
BACKGROUND: It is well known that immunization of radiation-attenuated (RA) schistosoma cercariae or schistosomula can induce high levels of protective immunity against schistosoma cercariae reinfection in many animals. Many studies have shown that the Th1 cellular immune response is crucial for the protective effect elicited by RA schistosomula. However, the molecular mechanism of this strong protective immunity remains unclear. METHODS: The expression profiles of Schistosoma japonicum calreticulin (SjCRT) in RA and normal schistosoma-derived cells were investigated by flow cytometry...
November 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29132135/increased-th1-th17-responses-contribute-to-low-grade-inflammation-in-age-related-macular-degeneration
#16
Jiajia Chen, Wenzhan Wang, Qiuming Li
BACKGROUND/AIMS: Age-related macular degeneration (AMD) is the primary cause of senior blindness in developed countries. Mechanisms underlying initiation and development of AMD remained known. METHODS: We examined the CD4+ T cell compartments and their functions in AMD patients. RESULTS: AMD patients presented significantly higher frequencies of interferon (IFN)-γ-expressing and interleukin (IL)-17-expressing CD4+ T cells than healthy controls...
November 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29131459/differential-contribution-of-interleukin-10-promoter-variants-in-malaria-and-schistosomiasis-mono-and-co-infections-among-nigerian-children
#17
Ayodele Adedoja, Nghiem Xuan Hoan, Hoang van Tong, Selorme Adukpo, Deborah B Tijani, Ajibola A Akanbi, Christian G Meyer, Olusola Ojurongbe, Thirumalaisamy P Velavan
OBJECTIVE: Interleukin-10 (IL-10) is an anti-inflammatory cytokine produced by Th1 cells and macrophages. The rationale of this study was to examine and validate possible contributions of IL-10 promoter polymorphisms in sub-Saharan Africa in children infected with either Plasmodium falciparum or Schistosoma haematobium and in children co-infected with both parasites. MATERIALS AND METHODS: 309 Nigerian children aged 4 to 15 years were recruited. The study group consisted of individuals infected either with P...
November 13, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29130994/enhancement-of-anti-leukemia-immunity-by-leukemia-derived-exosomes-via-downregulation-of-tgf-%C3%AE-1-expression
#18
Fang Huang, Jiangbo Wan, Weiwei Hu, Siguo Hao
BACKGROUND/AIMS: Minimal residual leukemia cells (MRLs) are difficult to eradicate through traditional treatment and therefore remain to be a major threat to the long-term survival of leukemia patients. Tumor-derived exosomes (TEXs), which carry tumor associated antigens (TAA), may be a potential cell-free tumor vaccine for the specific eradication of MRLs. However, TEXs are intended to be less immunogenic due to exosomal TGF-β1. To further optimize the efficacy of TEX-based vaccines, we investigated whether exosomes from TGF-β1 silenced leukemia cells (LEXTGF-β1si) had an increased potential to induce a specific antitumor effect compared with non-modified exosomes...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29130972/human-dendritic-cells-with-th2-polarizing-capacity-analysis-using-label-free-quantitative-proteomics
#19
Leonie Hussaarts, Maria Mardalena Martini Kaisar, Arzu Tugce Guler, Hans Dalebout, Bart Everts, André M Deelder, Magnus Palmblad, Maria Yazdanbakhsh
BACKGROUND: Dendritic cells (DCs) are the sentinels of the immune system. Upon recognition of a pathogen, they mature and migrate to draining lymph nodes to prime and polarize T cell responses. Although it is known that helminths and helminth-derived molecules condition DCs to polarize T helper (Th) cells towards Th2, the underlying mechanisms remain incompletely understood. OBJECTIVES: The aim of this study was to conduct a proteome analysis of helminth antigen-stimulated DCs in order to gain more insight into the cellular processes associated with their ability to polarize immune responses...
November 10, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29130606/oral-administration-of-lactobacillus-plantarum-cjlp133-and-cjlp243-alleviates-birch-pollen-induced-allergic-rhinitis-in-mice
#20
S-P Choi, H-N Oh, C-Y Choi, H Ahn, H S Yun, Y M Chung, B Kim, S J Lee, T Chun
AIMS: In this study, we evaluated the therapeutic efficacy of selected probiotics in a mouse model of birch pollen (BP)-induced allergic rhinitis. METHODS AND RESULTS: Oral administration of lactobacillus plantarum CJLP133 and CJLP243 ameliorated the symptoms of BP-induced allergic rhinitis by reducing airway hyperresponsiveness (AHR), and both the histological scores and the number of infiltrated cells in the nasal cavities and lungs. Compared with those from vehicle-treated mice, bronchoalveolar lavage (BAL) fluid and draining lymph node samples from CJLP133 and CJLP243-administrated mice showed diminished numbers of immune cells, increased secretion of a Th1-type cytokine (IFN-γ), and decreased production of Th2-type cytokines (IL-4, IL-5 and IL-13)...
November 12, 2017: Journal of Applied Microbiology
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