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T cell regulation

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https://www.readbyqxmd.com/read/28535649/-cancer-associated-fibroblasts-regulate-the-chemoresistance-of-lung-cancer-cell-line-a549-via-sdf-1-secretion
#1
F Zou, Z H Zhang, Y T Zhang, J Q Zhao, X L Zhang, C L Wen, X Y Song, W M Zhou
Objective: To investigate whether cancer-associated- fibroblasts (CAF), the key component of tumor microenvironment, regulate the chemoresistant capacity of lung cancer cell line A549 through SDF-1 secretion. Methods: Primary cell isolation techniques was used to isolate cancer-associated-fibroblasts from lung cancer patients. MTT assay was applied to determine the proliferation and chemoresistance of A549 cells. Quantative PCR was used to detect the mRNA changes of Bcl-xL. Western blotting was used to detect the protein expression of Bcl-xL...
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28535628/-expression-and-clinical-significance-of-long-non-coding-rna-ccat1-in-gastric-cancer
#2
T Shan, Y G Chen, B Hong, H Zhou, J Z Xia
Objective: To investigate the expression and clinical significance of long non-coding RNA colon cancer associated transcript-1 (CCAT1) in gastric cancer (GC), and to further explore the effect of CCAT1 on cell proliferation of GC. Methods: The mRNA expressions of CCAT1 in GC tissues and matched adjacent normal tissues from 62 patients who received resection for gastric carcinoma between January 2013 and May 2015 in Nanjing Medical University Affiliated Wuxi Second Hospital and expressions in GC cell lines were assessed by quantitative real-time PCR (qRT-PCR)...
May 16, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28535458/mtor-signaling-in-the-differentiation-and-function-of-regulatory-and-effector-t-cells
#3
REVIEW
Hu Zeng, Hongbo Chi
The mechanistic target of rapamycin (mTOR) signaling pathway integrates environmental signals and cellular metabolism to regulate T cell development, activation and differentiation. Recent studies reveal the importance of exquisite control of mTOR activity for proper T cell function, and detailed molecular mechanisms that regulate mTOR signaling in different T cell subsets. Here, we review the latest advances in our understanding of the mTOR pathway and its regulation in the differentiation and function of regulatory T cells and effector T cells...
May 20, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28535372/a-brain-region-specific-neural-pathway-regulating-germinal-matrix-angiogenesis
#4
Shang Ma, Devi Santhosh, Peeyush Kumar T, Zhen Huang
Intimate communication between neural and vascular cells is critical for normal brain development and function. Germinal matrix (GM), a key primordium for the brain reward circuitry, is unique among brain regions for its distinct pace of angiogenesis and selective vulnerability to hemorrhage during development. A major neonatal condition, GM hemorrhage can lead to cerebral palsy, hydrocephalus, and mental retardation. Here we identify a brain-region-specific neural progenitor-based signaling pathway dedicated to regulating GM vessel development...
May 22, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28535369/packing-on-the-pounds-in-response-to-bacterial-growth-conditions
#5
Sabih Rashid, Lesley T MacNeil
Reporting in Nature Cell Biology, Lin and Wang (2017) show that bacterial methyl metabolism impacts host mitochondrial dynamics and lipid storage in C. elegans. The authors propose a model whereby bacterial metabolic products regulate a nuclear hormone receptor that promotes lipid accumulation through expression of a secreted Hedgehog-like protein.
May 22, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28534937/the-inhibitory-effect-of-meg3-mir-214-aifm2-axis-on-the-growth-of-t-cell-lymphoblastic-lymphoma
#6
Fang-Yi Fan, Rui Deng, Hai Yi, Hao-Ping Sun, Yan Zeng, Guang-Cui He, Yi Su
T-cell lymphoblastic lymphoma (T-LBL) is an aggressive malignancy with poor prognosis and high recurrence rate. Long non-coding RNA (lncRNA)-MEG3 is an important tumor suppressor in various cancers. The present study investigated the potential role of maternally expressed gene 3 (MEG3) in the progression of T-LBL. Suppressed expression of MEG3 was detected in T-LBL tissues compared with adjacent histologically normal tissues. Down-regulated level of MEG3 was also found in three T-LBL cell lines (CCRF-CEM, Jurkat and SUP-T1) compared with human T-cell line H9...
May 17, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28534814/autophagy-regulates-proteasome-inhibitor-induced-pigmentation-in-human-embryonic-stem-cell-derived-retinal-pigment-epithelial-cells
#7
Kati Juuti-Uusitalo, Ali Koskela, Niko Kivinen, Johanna Viiri, Juha M T Hyttinen, Mika Reinisalo, Arto Koistinen, Hannu Uusitalo, Debasish Sinha, Heli Skottman, Kai Kaarniranta
The impairment of autophagic and proteasomal cleansing together with changes in pigmentation has been documented in retinal pigment epithelial (RPE) cell degeneration. However, the function and co-operation of these mechanisms in melanosome-containing RPE cells is still unclear. We show that inhibition of proteasomal degradation with MG-132 or autophagy with bafilomycin A1 increased the accumulation of premelanosomes and autophagic structures in human embryonic stem cell (hESC)-derived RPE cells. Consequently, upregulation of the autophagy marker p62 (also known as sequestosome-1, SQSTM1) was confirmed in Western blot and perinuclear staining...
May 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28534531/unravelling-the-biology-of-sclc-implications-for-therapy
#8
REVIEW
Joshua K Sabari, Benjamin H Lok, James H Laird, John T Poirier, Charles M Rudin
Small-cell lung cancer (SCLC) is an aggressive malignancy associated with a poor prognosis. First-line treatment has remained unchanged for decades, and a paucity of effective treatment options exists for recurrent disease. Nonetheless, advances in our understanding of SCLC biology have led to the development of novel experimental therapies. Poly [ADP-ribose] polymerase (PARP) inhibitors have shown promise in preclinical models, and are under clinical investigation in combination with cytotoxic therapies and inhibitors of cell-cycle checkpoints...
May 23, 2017: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/28534513/protein-disulfide-isomerase-a4-acts-as-a-novel-regulator-of-cancer-growth-through-the-procaspase-pathway
#9
T-F Kuo, T-Y Chen, S-T Jiang, K-W Chen, Y-M Chiang, Y-J Hsu, Y-J Liu, H-M Chen, K K Yokoyama, K-C Tsai, H-H Yeh, Y-R Chen, M-T Yang, C-Y Yang, W-C Yang
Protein disulfide isomerase a4 (PDIA4) is implicated in the growth and death of tumor cells; however, its molecular mechanism and therapeutic potential in cancer are unclear. Here, we found that PDIA4 expression was upregulated in a variety of tumor cell lines and human lung adenocarcinoma tissues. Knockdown and overexpression of PDIA4 in tumor cells showed that PDIA4 facilitated cell growth via the reduction of caspases 3 and 7 activity. Consistently, Lewis lung carcinoma cells overexpressing PDIA4 grew faster than did parental cells in tumor-bearing mice, as shown by a reduced survival rate, increased tumor size and metastasis, and decreased cell death and caspases 3 and 7 activity...
May 22, 2017: Oncogene
https://www.readbyqxmd.com/read/28534509/a-novel-interaction-of-pak4-with-ppar%C3%AE-to-regulate-nox1-and-radiation-induced-epithelial-to-mesenchymal-transition-in-glioma
#10
D Kesanakurti, D Maddirela, Y K Banasavadi-Siddegowda, T-H Lai, Z Qamri, N K Jacob, D Sampath, S Mohanam, B Kaur, V K Puduvalli
Tumor recurrence in glioblastoma (GBM) is, in part, attributed to increased epithelial-to-mesenchymal transition (EMT) and enhanced tumor cell dissemination in adjacent brain parenchyma after ionizing radiation (IR). EMT is associated with aggressive behavior, increased stem-like characteristics and treatment resistance in malignancies; however, the underlying signaling mechanisms that regulate EMT are poorly understood. We identified grade-dependent p21-activated kinases 4 (PAK4) upregulation in gliomas and further determined its role in mesenchymal transition and radioresistance...
May 22, 2017: Oncogene
https://www.readbyqxmd.com/read/28534508/utx-promotes-hormonally-responsive-breast-carcinogenesis-through-feed-forward-transcription-regulation-with-estrogen-receptor
#11
G Xie, X Liu, Y Zhang, W Li, S Liu, Z Chen, B Xu, J Yang, L He, Z Zhang, T Jin, X Yi, L Sun, Y Shang, J Liang
UTX is implicated in embryonic development and lineage specification. However, how this X-linked histone demethylase contributes to the occurrence and progression of breast cancer remains to be clarified. Here we report that UTX is physically associated with estrogen receptor (ER) and functions in ER-regulated transcription. We showed that UTX coordinates with JHDM1D and CBP to direct H3K27 methylation-acetylation transition and to create a permissive chromatin state on ER targets. Genome-wide analysis of the transcriptional targets of UTX by ChIP-seq identified a set of genes such as chemokine receptor CXCR4 that are intimately involved in breast cancer tumorigenesis and metastasis...
May 22, 2017: Oncogene
https://www.readbyqxmd.com/read/28534443/cd59-polymorphisms-are-associated-with-gene-expression-and-different-sexual-susceptibility-to-pemphigus-foliaceus
#12
Amanda Salviano-Silva, Maria Luiza Petzl-Erler, Angelica Beate Winter Boldt
Pemphigus foliaceus (PF) is an autoimmune disease, endemic in Brazilian rural areas, characterized by acantholysis and accompanied by complement activation, with generalized or localized distribution of painful epidermal blisters. CD59 is an essential complement regulator, inhibiting formation of the membrane attack complex, and mediating signal transduction and activation of T lymphocytes. CD59 has different transcripts by alternative splicing, of which only two are widely expressed, suggesting the presence of regulatory sites in their noncoding regions...
May 23, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28534426/the-immunological-personality-of-close-relatives-of-sle-patients
#13
M R Salaman, D A Isenberg
Immunological abnormalities seen in relatives of patients with autoimmune disorders can be useful in understanding the pathogenesis of the disease since, unlike in patients, they cannot result from the disease process or drug treatment. In this article we present a brief overview of our studies of the basic immunological status of close relatives of SLE patients. We looked at blood levels of IgG, IgM and antibodies to double-stranded DNA, as well as at NK cell numbers and cytotoxic activity and the levels of NKT, B and T cells...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28534337/-mir-145-inhibits-drug-resistance-to-oxaliplatin-in-colorectal-cancer-cells-through-regulating-g-protein-coupled-receptor-98
#14
Qiang Fu, Jing Cheng, Jindai Zhang, Yonglei Zhang, Xiaobing Chen, Jianguo Xie, Suxia Luo
OBJECTIVE: To predict and identify the target gene of miR-145, and to explore the underlying mechanism of the inhibition of miR-145 on drug resistance to Oxaliplatin (L-OHP) in human colorectal cancer cells. METHODS: L-OHP-resistant human colorectal cancer cell line (HCT116/L-OHP) was established in vitro by exposing to increased concentrations of L-OHP in cell culture medium. MiR-145-mimics and its negative control (NC-miRNA) were transfected into HCT116/L-OHP cells using liposome to establish HCT116/L-OHP(mimics) over-expressing miR-145 and HCT116/L-OHP(NC)...
May 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28534191/tgf-%C3%AE-in-inflammatory-bowel-disease-a-key-regulator-of-immune-cells-epithelium-and-the-intestinal-microbiota
#15
REVIEW
Sozaburo Ihara, Yoshihiro Hirata, Kazuhiko Koike
Inflammatory bowel disease (IBD) is defined as chronic intestinal inflammation, and includes ulcerative colitis and Crohn's disease. Multiple factors are involved in the pathogenesis of IBD, and the condition is characterized by aberrant mucosal immune reactions to intestinal microbes in genetically susceptible hosts. Transforming growth factor-β (TGF-β) is an immune-suppressive cytokine produced by many cell types and activated by integrins. Active TGF-β binds to its receptor and regulates mucosal immune reactions through the TGF-β signaling pathway...
May 22, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28534088/the-ppar-gamma-binding-sequence-pal3-is-necessary-for-basal-but-dispensable-for-high-fat-diet-regulated-human-renin-expression-in-the-kidney
#16
Peter Lachmann, Jenny Selbmann, Linda Hickmann, Bernd Hohenstein, Christian Hugo, Vladimir T Todorov
We reported earlier that PPAR-gamma regulates renin transcription through a human-specific atypical binding sequence termed hRen-Pal3. Here we developed a mouse model to investigate the functional relevance of the hRen-Pal3 sequence in vivo since it might be responsible for the increased renin production in obesity and thus for the development of accompanying arterial hypertension. We used bacterial artificial chromosome construct and co-placement strategy to generate two transgenic mouse lines expressing the human renin gene from identical genomic locus without affecting the intrinsic mouse renin expression...
May 22, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28533995/crohn-s-disease-and-ulcerative-colitis-show-unique-cytokine-profiles
#17
Zoltan H Nemeth, Dorian A Bogdanovski, Patricia Barratt-Stopper, Samantha R Paglinco, Luca Antonioli, Rolando H Rolandelli
INTRODUCTION: Networks of cytokines have been implicated in both forms of inflammatory bowel disease (IBD): Crohn's disease (CD) and ulcerative colitis (UC). While CD has associated with T-helper type 1 (Th1) immune responses, UC shows Th2 patterns. Recent studies reported that the inflamed intestinal regions in both CD and UC are significantly infiltrated with a newly described set of T helper, the Th17 cells. These cells have unique cytokine responses. These findings prompted us to further explore the cytokine profiles of CD and UC with a special focus on the Th2 and Th17 related mediators...
April 19, 2017: Curēus
https://www.readbyqxmd.com/read/28533977/serotonergic-activation-during-courtship-and-aggression-in-the-brown-anole-anolis-sagrei
#18
Jacob T Hartline, Alexandra N Smith, David Kabelik
The role of serotonin (5-hydroxytryptamine, 5-HT) in social behavior regulation is not fully understood. While 5-HT release in nuclei of the social behavior network has generally been associated with inhibition of aggressive behavior across multiple classes of vertebrates, less is known about its effects on sexual, especially non-copulatory courtship display behaviors. Furthermore, most research has examined effects at 5-HT release sites, while studies examining the behavioral relevance of source cell populations have generated contradictory findings...
2017: PeerJ
https://www.readbyqxmd.com/read/28533538/proteomic-analysis-of-jak2v617f-induced-changes-identifies-potential-new-combinatorial-therapeutic-approaches
#19
S Pearson, A J K Williamson, R Blance, T C P Somervaille, S Taylor, N Azadbakht, A D Whetton, A Pierce
In excess of 90% of patients with polycythemia vera express a mutated form of JAK2, JAK2V617F. Such aberrant proteins offer great potential for the treatment of these diseases however inhibitors to JAK2 have had limited success in the clinic in terms of curing the disease. To understand the effects of this oncogene in hematopoietic cells with the aim of improving treatment strategies we undertook a systematic evaluation of the effects of JAK2V617F expression using proteomics. The effects of JAK2V617F on over 5000 proteins and 2000 nuclear phosphopeptides sites were relatively quantified using either SILAC or eight channel iTRAQ mass spectrometry...
May 23, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28533483/high-il-1r8-expression-in-breast-tumors-promotes-tumor-growth-and-contributes-to-impaired-antitumor-immunity
#20
Luis Felipe Campesato, Ana Paula M Silva, Luna Cordeiro, Bruna R Correa, Fabio C P Navarro, Rafael F Zanin, Marina Marçola, Lilian T Inoue, Mariana L Duarte, Martina Molgora, Fabio Pasqualini, Matteo Massara, Pedro Galante, Romualdo Barroso-Sousa, Nadia Polentarutti, Federica Riva, Erico T Costa, Alberto Mantovani, Cecilia Garlanda, Anamaria A Camargo
Tumors develop numerous strategies to fine-tune inflammation and avoid detection and eradication by the immune system. The identification of mechanisms leading to local immune dysregulation is critical to improve cancer therapy. We here demonstrate that Interleukin-1 receptor 8 (IL-1R8 - previously known as SIGIRR/TIR8), a negative regulator of Toll-Like and Interleukin-1 Receptor family signaling, is up-regulated during breast epithelial cell transformation and in primary breast tumors. IL-1R8 expression in transformed breast epithelial cells reduced IL-1-dependent NF-κB activation and production of pro-inflammatory cytokines, inhibited NK cell activation and favored M2-like macrophage polarization...
May 9, 2017: Oncotarget
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