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Stat3

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https://www.readbyqxmd.com/read/28445987/context-dependent-mir-204-and-mir-211-affect-the-biological-properties-of-amelanotic-and-melanotic-melanoma-cells
#1
Marianna Vitiello, Andrea Tuccoli, Romina D'Aurizio, Samanta Sarti, Laura Giannecchini, Simone Lubrano, Andrea Marranci, Monica Evangelista, Silvia Peppicelli, Chiara Ippolito, Ivana Barravecchia, Elena Guzzolino, Valentina Montagnani, Michael Gowen, Elisa Mercoledi, Alberto Mercatanti, Laura Comelli, Salvatore Gurrieri, Lawrence W Wu, Omotayo Ope, Keith Flaherty, Genevieve M Boland, Marc R Hammond, Lawrence Kwong, Mario Chiariello, Barbara Stecca, Gao Zhang, Alessandra Salvetti, Debora Angeloni, Letizia Pitto, Lido Calorini, Giovanna Chiorino, Marco Pellegrini, Meenhard Herlyn, Iman Osman, Laura Poliseno
Despite increasing amounts of experimental evidence depicting the involvement of non-coding RNAs in cancer, the study of BRAFV600E-regulated genes has thus far focused mainly on protein-coding ones. Here, we identify and study the microRNAs that BRAFV600E regulates through the ERK pathway.By performing small RNA sequencing on A375 melanoma cells and a vemurafenib-resistant clone that was taken as negative control, we discover miR-204 and miR-211 as the miRNAs most induced by vemurafenib. We also demonstrate that, although belonging to the same family, these two miRNAs have distinctive features...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445971/stat3-regulates-glycolysis-via-targeting-hexokinase-2-in-hepatocellular-carcinoma-cells
#2
Man Li, Rui Jin, Weihua Wang, Tieying Zhang, Jiao Sang, Na Li, Qunying Han, Wenxuan Zhao, Chunyan Li, Zhengwen Liu
Signal transducer and activator of transcription 3 (STAT3) and hexokinase 2 (HK2) are involved in hepatocellular carcinoma (HCC). Deregulation of cellular energetics involving an increase in glycolysis is a characteristic of HCC. This study examined whether STAT3 regulates HCC glycolysis through the HK2 pathway in HCC cells. Human HCC cell lines HepG2 and Hep3B cells were transfected with pcDNA3.1(+)-EGFP-STAT3, STAT3 siRNA and HK2 siRNA, respectively, or treated with rapamycin, an inhibitor of mammalian target of rapamycin (mTOR), and the effects on STAT3 and HK2 expression and cell glycolysis were determined...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445952/socs3-inhibits-the-pathological-effects-of-il-22-in-non-melanoma-skin-tumor-derived-keratinocytes
#3
Stefania Madonna, Claudia Scarponi, Martina Morelli, Rosanna Sestito, Pasqualina Liana Scognamiglio, Daniela Marasco, Cristina Albanesi
Basal cell carcinomas (BCC) and squamous-cell carcinomas (SCC) are common malignancies in humans, caused by neoplastic transformation of keratinocytes of the basal or suprabasal layers of epidermis, respectively. Tumor-infiltrating lymphocytes (TILs) are frequently found in BCC and SCC, and functionally promote epithelial carcinogenesis. TILs secreting IL-22, in particular, participate to BCC and SCC growth by inducing keratinocyte proliferation and migration, as well as the expression of inflammatory, anti-apoptotic and pro-angiogenic genes...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445949/lmp1-slamf1high-cells-are-associated-with-drug-resistance-in-epstein-barr-virus-positive-farage-cells
#4
Heejei Yoon, Young Hyeh Ko
How Epstein-Barr virus (EBV) affects the clinical outcome of EBV-positive diffuse large B-cell lymphoma (DLBCL) remains largely unknown. The viral oncogene LMP1 is at the crux of tumorigenesis and cell survival. Therefore, we examined the association between LMP1high cells drug resistance. We first assessed SLAMF1 as a surrogate marker for LMP1high cells. LMP1 and its target gene CCL22 were highly expressed in SLAMF1high Farage cells. These cells survived longer following treatment with a combination of cyclophosphamide, doxorubicin, vincristine and prednisone (CHOP)...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445726/sirtuin-1-activation-controls-tumor-growth-by-impeding-th17-differentiation-via-stat3-deacetylation
#5
Emeric Limagne, Marion Thibaudin, Romain Euvrard, Hélène Berger, Pauline Chalons, Frédérique Végan, Etienne Humblin, Romain Boidot, Cédric Rébé, Valentin Derangère, Sylvain Ladoire, Lionel Apetoh, Dominique Delmas, François Ghiringhelli
Sirtuin-1 deacetylates proteins and has emerged as a critical regulator of different cellular processes, particularly inflammation. Basal SIRT1 activity was previously found to limit Th9 and enhance Th17 differentiation in mice, but the effect of pharmacological SIRT1 activation on T cell differentiation and antitumor responses remains unclear. Here, we find that SIRT1 pharmacological agonists selectively impede mouse and human Th17 cell differentiation. SIRT1 activation induces STAT3 deacetylation, thus reducing its ability to translocate into the nucleus, bind to Rorc promoter, and induce its transcription...
April 25, 2017: Cell Reports
https://www.readbyqxmd.com/read/28445259/the-role-of-stat3-and-ahr-in-the-differentiation-of-cd4-t-cells-into-th17-and-treg-cells
#6
Xingxing Liu, Hui Hu, Heng Fan, Dongmei Zuo, Zhexing Shou, Yi Liao, Zhen Nan, Qing Tang
BACKGROUND: This study aimed to investigate the role of aryl hydrocarbon receptor (AhR) and STAT3 gene during the differentiation of cluster of differentiation (CD)4 T cells into T helper (Th)17 and T regulatory (Treg) cells. METHODS: First, CD4 T cells were isolated from the spleen of BALB/c mice. Then, stable CD4 T cells expressing STAT3 shRNA were constructed. CD4 T cells were assigned to one of the following treatments: Th17 group: antibodies against CD3 and CD28, 2...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28444938/low-concentration-arsenite-activated-jak2-stat3-signal-and-increased-proliferative-factor-expressions-in-sv-huc-1cells-after-short-and-long-time-treatment
#7
Li Mengdan, Wang Chen, Liu Jieyu, Jin Peiyu, Wang Fei, Liu Shengnan, Xi Shuhua
Epidemiological studies have indicated that ingestion of inorganic arsenic resulted in increased risks of bladder cancer and chronic hyperproliferation could play a direct role in the development of cancer. This study examined the effects of arsenite on JAK2/STAT3 pathway and expressions of proliferation and anti-apoptosis factors. The results showed that long term exposure to low doses arsenite enhanced human uroepithelial cells (SV-HUC-1 cells) proliferation and BrdU positive rate was significant increased...
April 26, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28443075/grim-19-restricts-hcv-replication-by-attenuating-intracellular-lipid-accumulation
#8
Jung-Hee Kim, Pil S Sung, Eun B Lee, Wonhee Hur, Dong J Park, Eui-Cheol Shin, Marc P Windisch, Seung K Yoon
Gene-associated with retinoid-interferon-induced mortality 19 (GRIM-19) targets multiple signaling pathways involved in cell death and growth. However, the role of GRIM-19 in the pathogenesis of hepatitis virus infections remains unexplored. Here, we investigated the restrictive effects of GRIM-19 on the replication of hepatitis C virus (HCV). We found that GRIM-19 protein levels were reduced in HCV-infected Huh7 cells and Huh7 cells harboring HCV replicons. Moreover, ectopically expressed GRIM-19 caused a reduction in both intracellular viral RNA levels and secreted viruses in HCVcc-infected cell cultures...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28442484/low-dose-leptin-infusion-in-the-fourth-ventricle-of-rats-enhances-the-response-to-third-ventricle-leptin-injection
#9
Ruth B S Harris
We previously reported that low dose leptin infusions into the 3(rd) or 4(th) ventricle that do not effect energy balance when given independently cause rapid weight loss when given simultaneously. Therefore, we tested whether hindbrain leptin enhances the response to forebrain leptin, or whether forebrain leptin enhances the response to hindbrain leptin. Rats received 4(th) ventricle infusions of saline, 0.01, 0.1, 0.3 or 0.6 μg leptin/day for 13 days. On days 9 and 13 0.1 μg leptin was injected into the 3(rd) ventricle...
April 25, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28442260/synthesis-of-benzoxazole-derivatives-as-interleukin-6-antagonists
#10
Darong Kim, Hee Yeon Won, Eun Sook Hwang, Young-Kook Kim, Hea-Young Park Choo
A growing number of studies have demonstrated that interleukin (IL)-6 plays pathological roles in the development of chronic inflammatory disease and autoimmune disease by activating innate immune cells and by stimulating adaptive inflammatory T cells. So, suppression of IL-6 function may be beneficial for prevention and treatment of chronic inflammatory disease. This study reports that a series of synthetic derivatives of benzoxazole have suppressive effects on IL-6-mediated signaling. Among 16 synthetic derivatives of benzoxazole, the compounds 4, 6, 11, 15, 17, and 19 showed a strong suppressive activity against IL-6-induced phosphorylation of signal transducer and activator of transcription (STAT) 3 by 80-90%...
April 7, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28441662/buffalo-leukemia-inhibitory-factor-induces-differentiation-and-dome-like-secondary-structures-in-cos-1-cells
#11
Gurjeet Kaur, Syed Azmal Ali, Shikha Pachauri, Dhruba Malakar, Jai K Kaushik, Ashok K Mohanty, Sudarshan Kumar
This study aimed to understand the molecular characteristics of buffalo leukemia inhibitory factor (BuLIF) and the generation of a stably transfected COS-1_BuLIF cell line for its functional characterization. Cumulus cells, isolated from oocytes, were separated, and total cDNA was prepared. The BuLIF gene was ligated into the cloning vector pJET1.2/blunt and expression vector pAcGFP-N1 which was transfected into COS-1 cells and confirmed by qRT-PCR and Western blot. BuLIF was immunoprecipitated and evaluated through a MTT assay...
April 26, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28440564/hypoxia-inhibited-dusp2-expression-promotes-il-6-stat3-signaling-in-endometriosis
#12
Kuei-Yang Hsiao, Ning Chang, Jia-Ling Tsai, Shih-Chieh Lin, Shaw-Jenq Tsai, Meng-Hsing Wu
PROBLEM: How does hypoxia-mediated downregulation of dual-specificity phosphatase-2 (DUSP2) promote the development of endometriotic lesions? METHOD OF STUDY: The levels of IL-6 and DUSP2 were assessed in eutopic stromal cells with DUSP2 knockdown or hypoxia treatment. Bromodeoxyuridine (BrdU) incorporation was applied for evaluating cell proliferation. The protein levels of DUSP2, cleaved caspase-3, phosphorylated STAT3, and STAT3 were analyzed using immunoblot...
April 25, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28440514/silibinin-downregulates-mmp2-expression-via-jak2-stat3-pathway-and-inhibits-the-migration-and-invasive-potential-in-mda-mb-231-cells
#13
Hyo Joo Byun, Pramod Darvin, Dong Young Kang, Nipin Sp, Youn Hee Joung, Jong Hwan Park, Sun Jin Kim, Young Mok Yang
Worldwide, breast cancer (BCa) is the most common cancer in women. Among its subtypes, triple-negative breast cancer (TNBC) is an aggressive form associated with diminished survival. TNBCs are characterized by their absence, or minimal expression, of the estrogen and progesterone receptors, as well as the human epidermal growth factor receptor 2 (i.e. ER-/-, PR-/-, Her2-/Low). Consequently, treatment for this subtype of BCa remains problematic. Silibinin, a derivative of the flavonoid silymarin, is reported to have anticancer activities against hepatic and non-small cell lung cancers...
April 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28440494/low-dose-paclitaxel-suppresses-the-induction-of-m2%C3%A2-macrophages-in-gastric-cancer
#14
Takahisa Yamaguchi, Sachio Fushida, Yasuhiko Yamamoto, Tomoya Tsukada, Jun Kinoshita, Katsunobu Oyama, Tomoharu Miyashita, Hidehiro Tajima, Itasu Ninomiya, Seiichi Munesue, Ai Harashima, Shinichi Harada, Hiroshi Yamamoto, Tetsuo Ohta
Tumor-associated macrophages of the M2 phenotype promote tumor proliferation and are associated with a poor prognosis in patients with various malignancies, including gastric cancer with peritoneal dissemination. The present study assessed whether paclitaxel (PTX) suppresses M2 macrophages, by acting as a Toll-like receptor 4 (TLR4) agonist. Macrophages derived from the THP-1 monocytic cell line and peripheral blood mononuclear cell (PBMC)-derived macrophages were cultured with gastric cancer cells in medium containing PTX, at a concentration that did not affect cell proliferation...
April 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28440206/role-of-foxm1-in-the-progression-and-epithelial-to-mesenchymal-transition-of-gastrointestinal-cancer
#15
Jing Zhang, Yangyang Niu, Chen Huang
Background and Objective:Gastrointestinal (GI) cancer, characterized by its leading mortality, is one of the most common cancers worldwide. The underlying mechanisms contributing to epithelial to mesenchymal transition (EMT) and metastasis of GI cancer is poorly understood. It is well known that a great number of transcription factors including FoxM1, KLF4, STAT3 and so forth, are associated with the process of EMT and have also been strongly implicated in the proliferation, migration, and invasion of GI cancer cells...
April 24, 2017: Recent Patents on Anti-cancer Drug Discovery
https://www.readbyqxmd.com/read/28438638/adenosine-a2a-receptor-modulates-neuroimmune-function-through-th17-retinoid-related-orphan-receptor-gamma-t-ror%C3%AE-t-signaling-in-a-btbr-t-itpr3-tf-j-mouse-model-of-autism
#16
Mushtaq A Ansari, Ahmed Nadeem, Sabry M Attia, Saleh A Bakheet, Raish Mohammad, Sheikh F Ahmad
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder characterized by abnormal social interactions, repetitive behaviors that impair social communication, and circumscribed interests. BTBR T+tf/J (BTBR) inbred mice are generally used as a model for ASD, as they show repetitive behaviors and social deficits that resemble signs of ADS in humans. Adenosine A2A receptors (A2ARs) are considered as potential targets in the treatment of immune, inflammatory, and neurodegenerative diseases. In this study, we investigated the potential effects of the A2A adenosine receptor (A2AR) antagonist SCH 5826 (SCH) and agonist CGS 21680 (CGS) on behavior (self-grooming), hot plate test results, and expression levels of IL-17A(+), RORγt(+), Foxp3(+), and IL-10(+) in CD4(+) T spleen cells in BTBR and C57BL/6 (B6) mice...
April 21, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28438385/small-molecules-inhibit-stat3-activation-autophagy-and-cancer-cell-anchorage-independent-growth
#17
Donghui Zhou, Maya Z Springer, David Xu, Degang Liu, Andy Hudmon, Kay F Macleod, Samy O Meroueh
Triple-negative breast cancers (TNBCs) lack the signature targets of other breast tumors, such as HER2, estrogen receptor, and progesterone receptor. These aggressive basal-like tumors are driven by a complex array of signaling pathways that are activated by multiple driver mutations. Here we report the discovery of 6 (KIN-281), a small molecule that inhibits multiple kinases including maternal leucine zipper kinase (MELK) and the non-receptor tyrosine kinase bone marrow X-linked (BMX) with single-digit micromolar IC50s...
March 23, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28438053/scorpion-venom-causes-upregulation-of-p53-and-downregulation-of-bcl-xl-and-bid-protein-expression-by-modulating-signaling-proteins-erk-1-2-and-stat3-and-dna-damage-in-breast-and-colorectal-cancer-cell-lines
#18
Abdulrahman Khazim Al-Asmari, Anvarbatcha Riyasdeen, Mozaffarul Islam
Scorpion venoms efficiently block the normal neurotransmitter signaling pathway by prejudicing the ion channel operating mechanism in the body system. Besides its negative effect, venoms also possess some beneficial qualities for humans. They have also been shown to exhibit anticancer properties in various cancer types. This unique property of the venom as an anticancer agent is mainly a result of its role in initiating apoptosis and inhibiting several signaling cascade mechanisms that promote cancer cell proliferation and growth...
April 1, 2017: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/28437360/dna-hydroxymethylation-by-ten-eleven-translocation-methylcytosine-dioxygenase-1-and-3-regulates-nociceptive-sensitization-in-a-chronic-inflammatory-pain-model
#19
Zhiqiang Pan, Zhou-Ya Xue, Guo-Fang Li, Meng-Lan Sun, Ming Zhang, Ling-Yun Hao, Qian-Qian Tang, Li-Jiao Zhu, Jun-Li Cao
BACKGROUND: Ten-eleven translocation methylcytosine dioxygenase converts 5-methylcytosine in DNA to 5-hydroxymethylcytosine, which plays an important role in gene transcription. Although 5-hydroxymethylcytosine is enriched in mammalian neurons, its regulatory function in nociceptive information processing is unknown. METHODS: The global levels of 5-hydroxymethylcytosine and ten-eleven translocation methylcytosine dioxygenase were measured in spinal cords in mice treated with complete Freund's adjuvant...
April 24, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28436114/all-trans-retinoic-acid-stimulates-overexpression-of-tumor-protein-d52-tpd52-isoform-3-and-neuronal-differentiation-of-imr-32-cells
#20
Sudha Sravanti Kotapalli, Chandrashekhar Dasari, Divya Duscharla, Karthik Reddy Kami Reddy, Manjula Kasula, Ramesh Ummanni
Tumor protein D52 (TPD52), a proto-oncogene is overexpressed in a variety of epithelial carcinomas and plays an important role in cell proliferation, migration and cell death. In the present study we found that the treatment of IMR-32 neuroblastoma (NB) cells with retinoic acid (RA) stimulates an increase in expression of TPD52. TPD52 expression is detectable after 72 h, can be maintained till differentiation of NB cells suggesting that TPD52 is involved in differentiation. Here, we demonstrate that TPD52 is essential for RA to promote differentiation of NB cells...
April 24, 2017: Journal of Cellular Biochemistry
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