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https://www.readbyqxmd.com/read/28107702/c1qbp-regulates-ybx1-to-suppress-the-androgen-receptor-ar-enhanced-rcc-cell-invasion
#1
Dan Yue, Yong Wang, Yin Sun, Yuanjie Niu, Chawnshang Chang
Early studies suggested that the androgen receptor (AR) might play important roles to promote the renal cell carcinoma (RCC) progression; however, the detailed mechanisms remain unclear. Here we demonstrated the higher YBX1 expression with lower C1QBP expression in human RCC clinical tissues, and the intensity of C1QBP was negatively correlated with the YBX1 nuclear expression. Mechanism dissection found C1QBP could interact with YBX1 to suppress the YBX1 activation via altering the YBX1 phosphorylation and nuclear translocation in RCC cells...
January 17, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28107698/the-natural-flavonoid-apigenin-sensitizes-human-cd44-prostate-cancer-stem-cells-to-cisplatin-therapy
#2
Suat Erdogan, Kader Turkekul, Rıza Serttas, Zeynep Erdogan
Prostate cancer (PCa) is the second most common type of cancer and the fifth leading cause of cancer-related death among men. Development of chemoresistance, tumor relapse and metastasis remain major barriers to effective treatment and all been identified to be associated with cancer stem cells (CSCs). Natural flavonoids such as apigenin have been shown to have the ability to improve the therapeutic efficacy of common chemotherapy agents through CSCs sensitization. Thus, the aim of this study was to evaluate the combination of apigenin with cisplatin on CD44(+) PCa stem cell growth and migration...
January 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28107697/egcg-a-tea-polyphenol-as-a-potential-mitigator-of-hematopoietic-radiation-injury-in-mice
#3
Mrinalini Tiwari, Bhakti Dixit, Suhel Parvez, Paban K Agrawala
Agents capable of providing protection, mitigation or therapy against radiation injuries have long been of interest of radiation biologists owing to the ever expanding application of radiation in our day to day life despite the well reported ill effects of exposure. The current study investigates radiomitigating potential of EGCG (epigallocatechin gallate), a tea polyphenol with known DNMT inhibitory property, in C57 Bl/6 mice model. Treatment with 0.1833mg/kg body weight EGCG, 1.5h post-irradiation to lethally whole body irradiated mice rendered 45% survival for 30days and also helped restoring the body weight of the animals...
January 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28107692/rna-binding-protein-msi2-positively-regulates-flt3-expression-in-myeloid-leukemia
#4
Ayuna Hattori, Daniel McSkimming, Natarajan Kannan, Takahiro Ito
FLT3 is frequently mutated and overexpressed in acute myelogenous leukemia (AML) and other hematologic malignancies. Although signaling events downstream of FLT3 receptor tyrosine kinase has been studied in depth, molecular mechanisms of how FLT3 expression is regulated at the post-transcriptional level in particular remain elusive. In this study, we investigated the roles of an RNA binding protein MSI2 as a regulator of FLT3 expression. MSI2 and FLT3 are significantly co-regulated in human AML and chronic myelogenous leukemia in blast crisis (BC-CML)...
January 11, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28107665/a-%C3%AF-%C3%AF-conjugation-containing-soft-and-conductive-injectable-polymer-hydrogel-highly-efficiently-rebuilds-cardiac-function-after-myocardial-infarction
#5
Rui Bao, Baoyu Tan, Shuang Liang, Ning Zhang, Wei Wang, Wenguang Liu
Previous studies suggested that a stiffer hydrogel system exhibited a better performance to promote heart function after myocardial infarction (MI). However, the nature of myocardium, a tissue that alternately contracts and relaxes with electrical impulses, leads us to hypothesize that a soft and conductive hydrogel may be in favor of mechanical and electrical signals transmission to enhance heart function after MI. In this work, π-π conjugation interaction was first employed to produce a soft injectable hydrogel with conductive property...
January 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28107664/safety-and-efficacy-of-cardiopoietic-stem-cells-in-the-treatment-of-post-infarction-left-ventricular-dysfunction-from-cardioprotection-to-functional-repair-in-a-translational-pig-infarction-model
#6
Maximilian Y Emmert, Petra Wolint, Andras Jakab, Sean P Sheehy, Francesco S Pasqualini, Thi Dan Linh Nguyen, Monika Hilbe, Burkhardt Seifert, Benedikt Weber, Chad E Brokopp, Dominika Macejovska, Etem Caliskan, Arnold von Eckardstein, Ruth Schwartlander, Viola Vogel, Volkmar Falk, Kevin Kit Parker, Mariann Gyöngyösi, Simon P Hoerstrup
To date, clinical success of cardiac cell-therapies remains limited. To enhance the cardioreparative properties of stem cells, the concept of lineage-specification through cardiopoietic-guidance has been recently suggested. However, so far, only results from murine studies and from a clinical pilot-trial in chronic heart-failure (CHF) are available, while systematic evidence of its therapeutic-efficacy is still lacking. Importantly, also no data from large animals or for other indications are available. Therefore, we here investigate the therapeutic-efficacy of human cardiopoietic stem cells in the treatment of post-infarction LV-dysfunction using a translational pig-model...
November 23, 2016: Biomaterials
https://www.readbyqxmd.com/read/28107651/one-ring-to-fight-them-all-the-sulfazecin-story
#7
Daniel Braga, Gerald Lackner
In this issue of Cell Chemical Biology, Li et al. (2017) report on the biosynthesis of the monobactam sulfazecin by Pseudomonas acidophila and hypothesize a novel mechanism of β-lactam ring formation. As monobactam antibiotics are unaffected by some emerging resistance mechanisms (particularly metallo-β-lactamases), this discovery opens prospects to engineer β-lactam antibiotics against multi-drug resistant pathogens.
January 19, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28107636/visceral-white-adipose-tissue-following-chronic-intermittent-and-sustained-hypoxia-in-mice
#8
David Gozal, Alex Gileles-Hillel, Rene Cortese, Yan Li, Isaac Almendros, Zhuanhong Qiao, Ahamed A Khalyfa, Jorge Andrade, Abdelnaby Khalyfa
BACKGROUND: Angiogenesis, a process induced by hypoxia in visceral white adipose tissue (vWAT) in the context of obesity, mediates obesity-induced metabolic dysfunction and insulin resistance. Chronic intermittent hypoxia (IH) and sustained hypoxia (SH) induce body weight reductions and insulin resistance of differing magnitude, suggesting different HIF-1α-related activity. METHODS: 8-week old male C57BL/6J mice (n=10-12/group) were exposed to either IH, SH,or room air (RA)...
January 20, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28107625/gold-nanoshell-mediated-remote-myotube-activation
#9
Attilio Marino, Satoshi Arai, Yanyan Hou, Andrea Degl'Innocenti, Valentina Cappello, Barbara Mazzolai, Young-Tae Chang, Virgilio Mattoli, Madoka Suzuki, Gianni Ciofani
Mild heat stimulation of muscle cells within the physiological range represents an intriguing approach for the modulation of their functions. In this work, photothermal conversion was exploited to remotely stimulate striated muscle cells by using gold nanoshells (NS) in combination with near-infrared (NIR) radiation. Temperature increments of approximately 5°C were recorded by using an intracellular fluorescent molecular thermometer and were demonstrated to efficiently induce myotube contraction. The mechanism at the base of this phenomenon was thoroughly investigated and was observed to be a Ca2+-independent event directly involving actin-myosin interactions...
January 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28107614/sirt1-dependent-anti-senescence-effects-of-cell-deposited-matrix-on-human-umbilical-cord-mesenchymal-stem-cells
#10
Long Zhou, Xi Chen, Tao Liu, Caihong Zhu, Michelle Si, Joseph Jargstorf, Mao Li, Guoqing Pan, Yihong Gong, Zong-Ping Luo, Huilin Yang, Ming Pei, Fan He
Human umbilical cord-derived mesenchymal stem cells (UC-MSCs) are considered an attractive cell source for tissue regeneration. However, environmental oxidative stress can trigger premature senescence in MSCs and thus compromises their regenerative potential. Extracellular matrix (ECM) derived from MSCs has been shown to facilitate cell proliferation and multilineage differentiation. This investigation evaluated the effect of cell-deposited decellularized ECM (DECM) on oxidative stress-induced premature senescence in UC-MSCs...
January 20, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28107610/tonsil-derived-mesenchymal-stem-cells-t-mscs-prevent-th17-mediated-autoimmune-response-via-regulation-of-the-programmed-death-1-programmed-death-ligand-1-pd-1-pd-l1-pathway
#11
Ji-Yon Kim, Minhwa Park, Yu-Hee Kim, Kyung-Ha Ryu, Kyung Ho Lee, Kyung-Ah Cho, So-Youn Woo
Our knowledge of the immunomodulatory role of mesenchymal stem cells (MSCs) in both the innate and adaptive immune systems has dramatically expanded, providing great promise for treating various autoimmune diseases. However, the contribution of MSCs to Th17 dominant immune disease, such as psoriasis and its underlying mechanism remains elusive. In this study, we demonstrated that human palatine tonsil-derived MSCs (T-MSCs) constitutively express both the membrane-bound and soluble forms of programmed death-ligand 1 (PD-L1), which enables T-MSCs to be distinguished from MSCs originating from other organs (i...
January 20, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28107584/targeting-of-tumor-growth-and-angiogenesis-underlies-the-enhanced-antitumor-activity-of-lenvatinib-in-combination-with-everolimus
#12
Masahiro Matsuki, Yusuke Adachi, Yoichi Ozawa, Takayuki Kimura, Taisuke Hoshi, Kiyoshi Okamoto, Osamu Tohyama, Kaoru Mitsuhashi, Atsumi Yamaguchi, Junji Matsui, Yasuhiro Funahashi
The combination of lenvatinib-a multiple receptor tyrosine kinase (RTK) inhibitor-plus everolimus-a mammalian target of rapamycin (mTOR) inhibitor-significantly improved clinical outcomes versus everolimus monotherapy in a phase 2 clinical study of metastatic renal cell carcinoma (RCC). Here, we investigated potential mechanisms underlying the antitumor activity of the combination treatment in preclinical RCC models. Lenvatinib plus everolimus showed greater antitumor activity than either monotherapy in 3 human RCC xenograft mouse models (A-498, Caki-1, and Caki-2)...
January 20, 2017: Cancer Science
https://www.readbyqxmd.com/read/28107550/enhanced-trpc-channel-mediated-ca-2-influx-in-the-cells-with-phospholipase-c-%C3%AE-1-overexpression-its-possible-role-in-coronary-artery-spasm
#13
Kazuo Murakami, Tomohiro Osanai, Makoto Tanaka, Kimitaka Nishizaki, Takahiko Kinjo, Tomohiro Tanno, Yuji Ishida, Akiko Suzuki, Tomohide Endo, Hirofumi Tomita, Ken Okumura
We reported that coronary spasm was induced in the transgenic mice with the increased phospholipase C (PLC)-δ1 activity. We investigated the effect of enhanced PLC-δ1 on Ca(2+) influx and its underlying mechanisms. We used human embryonic kidney (HEK)-293 and coronary arteries-smooth-muscle cells (CASMC). Intracellular free Ca(2+) concentration ([Ca(2+) ]i ) (nM) was measured by fura-2, and Ca(2+) influx was evaluated by the increase in [Ca(2+) ]i after addition of extracellular Ca(2+) . Acetylcholine (ACh) was used to induce Ca(2+) influx...
January 20, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28107546/bone-marrow-stroma-protects-myeloma-cells-from-cytotoxic-damage-via-induction-of-the-oncoprotein-muc1
#14
Michal Bar-Natan, Dina Stroopinsky, Katarina Luptakova, Maxwell D Coll, Arie Apel, Hasan Rajabi, Athalia R Pyzer, Kristen Palmer, Michaela R Reagan, Myrna R Nahas, Rebecca Karp Leaf, Salvia Jain, Jon Arnason, Irene M Ghobrial, Kenneth C Anderson, Donald Kufe, Jacalyn Rosenblatt, David Avigan
Multiple myeloma (MM) is a lethal haematological malignancy that arises in the context of a tumour microenvironment that promotes resistance to apoptosis and immune escape. In the present study, we demonstrate that co-culture of MM cells with stromal cells results in increased resistance to cytotoxic and biological agents as manifested by decreased rates of cell death following exposure to alkylating agents and the proteosome inhibitor, bortezomib. To identify the mechanism of increased resistance, we examined the effect of the co-culture of MM cells with stroma cells, on expression of the MUC1 oncogene, known to confer tumour cells with resistance to apoptosis and necrosis...
January 20, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28107529/complement-activation-and-stat4-expression-are-associated-with-early-inflammation-in-diabetic-wounds
#15
Kenji M Cunnion, Neel K Krishna, Haree K Pallera, Angela Pineros-Fernandez, Magdielis Gregory Rivera, Pamela S Hair, Brittany P Lassiter, Ryan Huyck, Mary A Clements, Antoinette F Hood, George T Rodeheaver, Patrick S Cottler, Jerry L Nadler, Anca D Dobrian
: Diabetic non-healing wounds are a major clinical problem. The mechanisms leading to poor wound healing in diabetes are multifactorial but unresolved inflammation may be a major contributing factor. The complement system (CS) is the most potent inflammatory cascade in humans and contributes to poor wound healing in animal models. Signal transducer and activator of transcription 4 (STAT4) is a transcription factor expressed in immune and adipose cells and contributes to upregulation of some inflammatory chemokines and cytokines...
2017: PloS One
https://www.readbyqxmd.com/read/28107526/rab14-act-as-oncogene-and-induce-proliferation-of-gastric-cancer-cells-via-akt-signaling-pathway
#16
Bo Guo, Wenjing Wang, Zhenghao Zhao, Qian Li, Kaiyue Zhou, Lingyu Zhao, Lumin Wang, Juan Yang, Chen Huang
Rab14 is a member of RAS oncogene family, and its dysfunction has been reported to be involved in various types of human cancer. However, its expression and function were still unclear in gastric cancer. The aim of this study was to investigate the function and mechanism of Rab14 in gastric cancer cell lines. Quantitative real-time PCR (qRT-PCR) was performed in 17 gastric adenocarcinoma tissues and 4 cell lines to detect the expression of Rab14. 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyl-tetrazolium bromide (MTT), colony formation and flow cytometry assays were employed to determine the proliferative ability, cell cycle transition and apoptosis in vitro in BGC-823 or SGC-7901 cells...
2017: PloS One
https://www.readbyqxmd.com/read/28107519/cudraflavone-c-induces-tumor-specific-apoptosis-in-colorectal-cancer-cells-through-inhibition-of-the-phosphoinositide-3-kinase-pi3k-akt-pathway
#17
Hsien-Chuen Soo, Felicia Fei-Lei Chung, Kuan-Hon Lim, Veronica Alicia Yap, Tracey D Bradshaw, Ling-Wei Hii, Si-Hoey Tan, Sze-Jia See, Yuen-Fen Tan, Chee-Onn Leong, Chun-Wai Mai
Cudraflavone C (Cud C) is a naturally-occurring flavonol with reported anti-proliferative activities. However, the mechanisms by which Cud C induced cytotoxicity have yet to be fully elucidated. Here, we investigated the effects of Cud C on cell proliferation, caspase activation andapoptosis induction in colorectal cancer cells (CRC). We show that Cud C inhibits cell proliferation in KM12, Caco-2, HT29, HCC2998, HCT116 and SW48 CRC but not in the non-transformed colorectal epithelial cells, CCD CoN 841. Cud C induces tumor-selective apoptosis via mitochondrial depolarization and activation of the intrinsic caspase pathway...
2017: PloS One
https://www.readbyqxmd.com/read/28107515/regulatory-mechanisms-underlying-the-expression-of-prolactin-receptor-in-chicken-granulosa-cells
#18
Shenqiang Hu, Raj Duggavathi, David Zadworny
Prolactin (PRL) has both pro- and anti-gonadal roles in the regulation of avian ovarian functions through its interaction with the receptor (PRLR). However, neither the pattern of expression of PRLR nor its regulatory mechanisms during follicle development have been clearly defined. The objective of the present study was to investigate mechanisms of PRLR expression in chicken granulosa cells. Levels of PRLR transcript were highest in the stroma and walls of follicles < 2 mm in diameter and progressively declined with the maturation of follicles...
2017: PloS One
https://www.readbyqxmd.com/read/28107427/serine-phosphorylation-of-slp76-is-dispensable-for-t-cell-development-but-modulates-helper-t-cell-function
#19
Victor H Navas, Céline Cuche, Andres Alcover, Vincenzo Di Bartolo
The adapter protein SLP76 is a key orchestrator of T cell receptor (TCR) signal transduction. We previously identified a negative feedback loop that modulates T cell activation, involving phosphorylation of Ser376 of SLP76 by the hematopoietic progenitor kinase 1 (HPK1). However, the physiological relevance of this regulatory mechanism was still unknown. To address this question, we generated a SLP76-S376A-expressing knock-in mouse strain and investigated the effects of Ser376 mutation on T cell development and function...
2017: PloS One
https://www.readbyqxmd.com/read/28107393/t-cell-subset-and-stimulation-strength-dependent-modulation-of-t-cell-activation-by-kv1-3-blockers
#20
Wai-Ping Fung-Leung, Wilson Edwards, Yi Liu, Karen Ngo, Julianty Angsana, Glenda Castro, Nancy Wu, Xuejun Liu, Ronald V Swanson, Alan D Wickenden
Kv1.3 is a voltage-gated potassium channel expressed on T cells that plays an important role in T cell activation. Previous studies have shown that blocking Kv1.3 channels in human T cells during activation results in reduced calcium entry, cytokine production, and proliferation. The aim of the present study was to further explore the effects of Kv1.3 blockers on the response of different human T cell subsets under various stimulation conditions. Our studies show that, unlike the immune suppressor cyclosporine A, the inhibitory effect of Kv1...
2017: PloS One
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