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https://www.readbyqxmd.com/read/28108674/effects-of-microrna-338-on-morphine-tolerance-by-targeting-cxcr4-in-a-rat-model-of-bone-cancer-pain
#1
Hong-Xia Mei, Min-Hong Zhou, Xing-Wang Zhang, Xi-Xi Huang, Yong-Le Wang, Pei-Fang Wang, Gong-Hao Zhan
This study aimed to investigate the effects of microRNA-338 (miR-338) on morphine tolerance through the targeting of CXCR4 in a rat model of bone cancer pain (BCP). Sprague Dawley rats were obtained and divided into model saline (n = 10), model morphine (n = 50), normal saline (n = 10) and normal morphine (healthy rats, n = 10) groups. After BCP rat model establishment, the remaining SD rats (n = 40) in the model saline group were assigned into pLV-THM-miR-338, pLV-THM-anti-miR-338, CXCR4 shRNA, blank and phosphate buffer saline (PBS) groups...
January 20, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28104461/cxcr4-antagonist-amd3100-reverses-the-neurogenesis-promoted-by-enriched-environment-and-suppresses-long-term-seizure-activity-in-adult-rats-of-temporal-lobe-epilepsy
#2
Zhike Zhou, Tingting Liu, Xiaoyu Sun, Xiaopeng Mu, Gang Zhu, Ting Xiao, Mei Zhao, Chuansheng Zhao
It has been showed that enriched environment (EE) enhances the hippocampal neurogenesis and improves the cognitive impairments, accompanied by the increased expressions of stromal cell-derived factor-1 (SDF-1) in adult rats of temporal lobe epilepsy (TLE). We examined whether the enhanced neurogenesis and improved cognitive functions induced by EE following seizures were mediated by SDF-1/CXCR4 pathway. Therefore, we investigated the effects of the EE combined with CXCR4 antagonist AMD3100 on neurogenesis, cognitive functions and the long-term seizure activity in the TLE model...
January 16, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28103766/long-term-exposure-to-imatinib-mesylate-downregulates-hippo-pathway-and-activates-yap-in-a-model-of-chronic-myelogenous-leukemia
#3
Anna Chorzalska, Javier Flores Kim, Karim Roder, Alexander Tepper, Nagib Ahsan, R Shyama Prasad Rao, Adam J Olszewski, Xiaoqing Yu, Dmitry Terentyev, John Morgan, Diana O Treaba, Ting Zhao, Olin Liang, Philip Gruppuso, Patrycja Dubielecka
Despite the success of tyrosine kinase inhibitor (TKI) therapy in chronic myelogenous leukemia (CML), leukemic stem/progenitor cells remain detectable even in the state of deep molecular remission. Mechanisms that allow them to persist despite continued kinase inhibition remain unclear. We have previously shown that prolonged exposure to imatinib mesylate results in dysregulation of Akt/Erk 1/2 signaling, upregulation of miR-181a, enhanced adhesiveness, and resistance to high imatinib mesylate. In order to characterize the molecular basis and reversibility of those effects, we applied gene and protein expression analysis, quantitative phosphoproteomic, and direct miR-181a inhibition to our cellular model of CML cells subjected to prolonged exposure to imatinib mesylate...
January 19, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28103504/l-arginine-alters-the-effect-of-5-fluorouracil-on-breast-cancer-cells-in-favor-of-apoptosis
#4
Mozhgan Jahani, Mehri Azadbakht, Fatemeh Norooznezhad, Kamran Mansouri
Chemoresistance in breast cancer is a major obstacle, especially in p53 mutation types. The aim of this study was to evaluate if a combination therapy of l-arginine with 5-fluorouracil (5-FU) can alter the effect of this chemotherapy drug on breast cancer cells. The study was performed on BT-20 and MCF-7 cell lines. The effects of l-arginine alone and in combination with 5-FU were investigated on cell viability, apoptosis and nitric oxide (NO) production. Drugs effects on the cellular energetic metabolism were investigated through the lactate production and glucose-6-phosphate dehydrogenase (G6PD) activity assay...
January 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28102846/hepatitis-b-virus-x-protein-promotes-the-stem-like-properties-of-ov6-cancer-cells-in-hepatocellular-carcinoma
#5
Chao Wang, Ming-da Wang, Peng Cheng, Hai Huang, Wei Dong, Wei-Wei Zhang, Peng-Peng Li, Chuan Lin, Ze-Ya Pan, Meng-Chao Wu, Wei-Ping Zhou
Hepatitis B virus X protein (HBx) and cancer stem-like cells (CSCs) have both been implicated in the occurrence and development of HBV-related hepatocellular carcinoma (HCC). However, whether HBx contributes to the stem-like properties of OV6(+) CSCs in HCC remains elusive. In this study, we showed that the concomitant expression of HBx and OV6 was closely associated with the clinical outcomes and prognosis of patients with HBV-related HCC. HBx was required for the stem-like properties of OV6(+) liver CSCs, including self-renewal, stem cell-associated gene expression, tumorigenicity and chemoresistance...
January 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28101584/myeloprotective-effects-of-c-type-natriuretic-peptide-on-cisplatin-induced-bone-marrow-granulocytopenia-in-mice
#6
Masahiro Zenitani, Takashi Nojiri, Toru Kimura, Hiroshi Hosoda, Koichi Miura, Jun Hino, Kengo Nakahata, Shuichiro Uehara, Mikiya Miyazato, Takaharu Oue, Hiroomi Okuyama, Kenji Kangawa
PURPOSE: Cisplatin is an effective chemotherapeutic agent used to treat a variety of malignant tumors. The major toxicity associated with cisplatin treatment is granulocytopenia. C-type natriuretic peptide (CNP), a member of the natriuretic peptide family, protects against toxicity in many organs, including the heart, blood vessels, lung, and kidney. The objective of this study was to investigate the myeloprotective effects of CNP in a mouse model of cisplatin-induced granulocytopenia...
January 18, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28100513/loss-of-ranbp2-in-motor-neurons-causes-the-disruption-of-nucleocytoplasmic-and-chemokine-signaling-and-proteostasis-of-hnrnph3-and-mmp28-and-the-development-of-amyotrophic-lateral-sclerosis-als-like-syndromes
#7
Kyoung-In Cho, Dosuk Yoon, Sunny Qiu, Zachary Danziger, Warren M Grill, William C Wetsel, Paulo A Ferreira
The pathogenic drivers of sporadic and familial motor neuron disease (MND), such ALS, are unknown. MND impair the Ran GTPase cycle, which controls nucleocytoplasmic transport, ribostasis and proteostasis; however, cause-effect mechanisms of Ran GTPase modulators in motoneuron pathobiology are heretofore elusive. The cytosolic and peripheral nucleoporin, Ranbp2, is a critical regulator of the Ran GTPase cycle and proteostasis of neurological disease-prone substrates, but the roles of Ranbp2 in motoneuron biology and disease remain unknown...
January 18, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28099928/the-sdf-1-cxcr4-axis-promotes-recovery-after-spinal-cord-injury-by-mediating-bone-marrow-derived-from-mesenchymal-stem-cells
#8
Guo-Dong Wang, Yi-Xun Liu, Xiao Wang, Yong-Le Zhang, Ya-Dong Zhang, Feng Xue
This study aims to explore the role of the SDF-1/CXCR4 axis in mediating BMSCs and SCI recovery. BMSCs were collected and SCI rat models were established. Wistar rats were assigned into the blank control, sham, SCI, SCI + BMSCs, SCI + BMSCs + SDF-1, SCI + BMSCs + AMD3100 (an inhibitor of SDF-1/CXCR4 axis) and SCI + BMSCs + SDF-1 + AMD3100 groups. Hind limb motor function was measured 7, 14, 21 and 28 days after operation. qRT-PCR, western blotting and ELISA was performed to determine the expressions of SDF-1, CXCR4, NGF, BDNF, GFAP and GAP-43, TNF-α, IL-1β, L-6 and IFN-γ...
January 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28092866/transmembrane-tumor-necrosis-factor-%C3%AE-promotes-the-recruitment-of-mdscs-to-tumor-tissue-by-upregulating-cxcr4-expression-via-tnfr2
#9
Hongping Ba, Baihua Li, Xiaoyan Li, Cheng Li, Anlin Feng, Yazhen Zhu, Jing Wang, Zhuoya Li, Bingjiao Yin
Myeloid-derived suppressor cells (MDSCs) accumulated in tumor sites promote immune evasion. We found that TNFR deficiency-induced rejection of transplanted tumor was accompanied with markedly decreased accumulation of MDSCs. However, the mechanism(s) behind this phenomenon is not completely understood. Here, we demonstrated that TNFR deficiency did not affect the amount of MDSCs in bone marrow (BM), but decreased accumulation of Gr-1(+)CD11b(+) MDSCs in the spleen and tumor tissues. The chemotaxis of Tnfr(-/-) MDSCs was prominently decreased in response to both tumor cell culture supernatants and tumor tissue homogenates from Tnfr(-/-) and wild-type mice, indicating an effect of TNFR signaling on chemokine receptor expression in MDSCs...
January 13, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28092843/therapeutic-effects-of-bach1-sirna-on-human-breast-adenocarcinoma-cell-line
#10
Mansoor Aletaha, Behzad Mansoori, Ali Mohammadi, Mehdi Fazeli, Behzad Baradaran
BACKGROUND: Despite the great improvements in clinical and therapeutic techniques in recent years, many advanced breast cancer patients still died of the postoperative recurrence and metastasis of disease. Bach1 plays a role in the development of the invasive phenotypes of cancer, cell division and apoptosis in tumor cells. The aim of this study was to investigate the effect of specific bach1 siRNAs, on the proliferation, migration, invasive, induction of apoptosis, cell cycle arrest and alter EMT related miRNA of MDA-MB-468 cells (breast cancer)...
January 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28078743/bivalent-14-mer-peptide-ligands-of-cxcr4-with-polyproline-linkers-with-anti-chemotactic-activity-against-jurkat-cells
#11
Tomohiro Tanaka, Toru Aoki, Wataru Nomura, Hirokazu Tamamura
Interaction of CXCR4 with its endogenous ligand, stromal-cell derived factor-1 (SDF-1)/CXCL12, induces various physiological functions involving chemotaxis. Bivalent ligands with a polyproline helix bearing a cyclic pentapeptide, FC131, were previously shown to have higher binding affinities for CXCR4 than the corresponding monovalent ligands. Bivalent ligands based on a 14-mer peptide T140 derivative with polyproline linkers have been designed and synthesized. The activity of these peptides as well as the effect of bivalency of the ligand on CXCR4 binding has been assessed...
January 12, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28076327/mir-410-induces-stemness-by-inhibiting-gsk3%C3%AE-but-upregulating-%C3%AE-catenin-in-non-small-cells-lung-cancer
#12
Xixian Ke, Yue Yuan, Chenglin Guo, Yan Yang, Qiang Pu, Xueting Hu, Kui Tang, Xinmei Luo, Qianqian Jiang, Xiaolan Su, Lunxu Liu, Wen Zhu, Yuquan Wei
Our previous research indicated miR-410 played a critical role in promoting the tumorigenesis and development of NSCLC (non-small cells lung cancer). MiR-410 has been recently reported to be crucial for development and differentiation of embryonic stem cells. But it remains elusive whether miR-410 stimulates the stemness of cancer until now. Herein, we identify miR-410 induces the stemness and is associated with the progression of NSCLC. We demonstrate miR-410 increases the levels of stem cells marker Sox2, Oct4, Nanog, CXCR4 as well as lung cancer stem cells surface marker CD44 and CD166...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28075616/role-of-cxc-chemokine-receptor-type-4-as-a-lactoferrin-receptor
#13
Yoshiharu Takayama, Reiji Aoki, Ryo Uchida, Atsushi Tajima, Ayako Aoki-Yoshida
Lactoferrin exerts its biological activities by interacting with receptors on target cells, including LDL receptor-related protein-1 (LRP-1/CD91), intelectin-1 (omentin-1), and Toll-like receptor 4 (TLR4). However, the effects mediated by these receptors are not sufficient to fully explain the many functions of lactoferrin. C-X-C-motif cytokine receptor 4 (CXCR4) is a ubiquitously expressed G-protein coupled receptor for stromal cell-derived factor-1 (SDF-1/CXCL12). Lactoferrin was found to be as capable as SDF-1 in blocking infection by an HIV variant that uses CXCR4 as a co-receptor (X4-tropic HIV), suggesting that lactoferrin interacts with CXCR4...
October 31, 2016: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28074063/direct-in-vivo-evidence-for-increased-proliferation-of-cll-cells-in-lymph-nodes-compared-to-bone-marrow-and-peripheral-blood
#14
T M Herndon, S-S Chen, N S Saba, J Valdez, C Emson, M Gatmaitan, X Tian, T E Hughes, C Sun, D C Arthur, M Stetler-Stevenson, C M Yuan, C U Niemann, G E Marti, G Aue, S Soto, M Z H Farooqui, S E M Herman, N Chiorazzi, A Wiestner
Chronic Lymphocytic Leukemia (CLL) is a progressive malignancy of mature B-cells that involves the peripheral blood (PB), lymph nodes (LNs) and bone marrow (BM). While the majority of CLL cells are in a resting state, small populations of proliferating cells exist; however, the anatomical site of active cell proliferation remains to be definitively determined. Based on findings that CLL cells in LNs have increased expression of B-cell activation genes, we tested the hypothesis that the fraction of 'newly born' cells would be highest in the LNs...
January 11, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28073681/association-of-cytoplasmic-cxcr4-with-loss-of-epithelial-marker-and-activation-of-erk1-2-and-akt-signaling-pathways-in-non-small-cell-lung%C3%A2-cancer
#15
Nabil F Saba, Yuxiang Wang, Hongpeng Fu, Lydia Koenig, Fadlo R Khuri, Dong M Shin, Zhuo Georgia Chen
OBJECTIVES: Compelling evidence demonstrates that CXC-chemokine receptor 4 (CXCR4) is involved in tumor invasion, angiogenesis, metastasis, and resistance to chemotherapy in addition to being one of the coreceptors for T-tropic human immunodeficiency virus entry into T cells. However, it remains controversial as to how to identify functionally activated CXCR4 in tumor biopsies, which would assist in determining which patients may benefit from potential CXCR4-targeted therapy. MATERIALS AND METHODS: Immunohistochemistry (IHC) staining on archival tissues of patients with non-small-cell lung cancer (NSCLC) was used to detect a panel of biomarkers, including phospho-ERK1/2, phospho-AKT, and E-cadherin, which are relevant to downstream signaling of CXCR4 and epithelial to mesenchymal transition (EMT)...
December 22, 2016: Clinical Lung Cancer
https://www.readbyqxmd.com/read/28072855/sdf-1%C3%AE-cxcr4-signaling-in-lipid-rafts-induces-platelet-aggregation-via-pi3-kinase-dependent-akt-phosphorylation
#16
Hiroko Ohtsuka, Tomohiro Iguchi, Moyuru Hayashi, Mizuho Kaneda, Kazuko Iida, Motoyuki Shimonaka, Takahiko Hara, Morio Arai, Yuichi Koike, Naomasa Yamamoto, Kohji Kasahara
Stromal cell-derived factor-1α (SDF-1α)-induced platelet aggregation is mediated through its G protein-coupled receptor CXCR4 and phosphatidylinositol 3 kinase (PI3K). Here, we demonstrate that SDF-1α induces phosphorylation of Akt at Thr308 and Ser473 in human platelets. SDF-1α-induced platelet aggregation and Akt phosphorylation are inhibited by pretreatment with the CXCR4 antagonist AMD3100 or the PI3K inhibitor LY294002. SDF-1α also induces the phosphorylation of PDK1 at Ser241 (an upstream activator of Akt), GSK3β at Ser9 (a downstream substrate of Akt), and myosin light chain at Ser19 (a downstream element of the Akt signaling pathway)...
2017: PloS One
https://www.readbyqxmd.com/read/28072604/epigenetic-upregulation-of-cxcl12-expression-mediates-anti-tubulin-chemotherapeutics-induced-neuropathic-pain
#17
Ting Xu, Xiao-Long Zhang, Han-Dong Ou-Yang, Zhen-Yu Li, Cui-Cui Liu, Zhen-Zhen Huang, Jing Xu, Jia-You Wei, Bi-Lin Nie, Chao Ma, Shao-Ling Wu, Wen-Jun Xin
Clinically, Microtubule-targeted agents-induced neuropathic pain hampers chemotherapeutics for cancer patients. Here, we found that application of paclitaxel or vincristine increased the protein and mRNA expression of CXCL12, and frequency and amplitude of miniature excitatory post synaptic currents (mEPSCs) in spinal dorsal horn neurons. Spinal local application of CXCL12 induced the long-term potentiation (LTP) of nociceptive synaptic transmission and increased the amplitude of mEPSCs. Inhibition of CXCL12 by using the transgenic mice (CXCL12) or neutralizing antibody or siRNA ameliorated the mEPSCs enhancement and mechanical allodynia...
January 7, 2017: Pain
https://www.readbyqxmd.com/read/28067275/sdf-1-cxcr4-axis-induces-human-dental-pulp-stem-cell-migration-through-fak-pi3k-akt-and-gsk3%C3%AE-%C3%AE-catenin-pathways
#18
Mingwei Li, Xuefei Sun, Liang Ma, Lu Jin, Wenfei Zhang, Min Xiao, Qing Yu
SDF-1 (stromal cell derived factor-1) has been found to be widely expressed during dental pulp inflammation, while hDPSCs (human dental pulp stem cells) contribute to the repair of dental pulp. We showed that the migration of hDPSCs was induced by SDF-1 in a concentration-dependent manner and could be inhibited with siCXCR4 (C-X-C chemokine receptor type 4) and siCDC42 (cell division control protein 42), as well as drug inhibitors such as AMD3100 (antagonist of CXCR4), LY294002 (inhibitor of PI3K) and PF573228 (inhibitor of FAK)...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28064239/recurrent-somatic-mutations-affecting-b-cell-receptor-signaling-pathway-genes-in-follicular-lymphoma
#19
Kilannin Krysiak, Felicia Gomez, Brian S White, Matthew Matlock, Christopher A Miller, Lee Trani, Catrina C Fronick, Robert S Fulton, Friederike Kreisel, Amanda F Cashen, Kenneth R Carson, Melissa M Berrien-Elliott, Nancy L Bartlett, Malachi Griffith, Obi L Griffith, Todd A Fehniger
Follicular lymphoma (FL) is the most common form of indolent non-Hodgkin lymphoma, yet it remains only partially characterized at the genomic level. In order to improve our understanding of the genetic underpinnings of this incurable and clinically heterogeneous disease, whole exome sequencing was performed on tumor/normal pairs from a discovery cohort of 24 patients with FL. Using these data, and mutations identified in other B-cell malignancies, 1716 genes were sequenced in 113 FL tumor samples, from 105 primarily treatment-naïve individuals...
November 14, 2016: Blood
https://www.readbyqxmd.com/read/28061765/mir-663a-regulates-growth-of-colon-cancer-cells-after-administration-of-antimicrobial-peptides-by-targeting-cxcr4-p21-pathway
#20
Kengo Kuroda, Tomokazu Fukuda, Marija Krstic-Demonacos, Constantinos Demonacos, Kazuhiko Okumura, Hiroshi Isogai, Miwa Hayashi, Kazuki Saito, Emiko Isogai
BACKGROUND: Antimicrobial peptides (AMPs) play important roles in the innate immune system of all life forms and recently have been characterized as multifunctional peptides that have a variety of biological roles such as anticancer agents. However, detailed mechanism of antimicrobial peptides on cancer cells is still largely unknown. METHODS: miRNA array and real-time qPCR were performed to reveal the behavior of miRNA in colon cancer HCT116 cells during the growth suppression induced by the AMPs...
January 7, 2017: BMC Cancer
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