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https://www.readbyqxmd.com/read/28620137/biological-specificity-of-cdk4-6-inhibitors-dose-response-relationship-in-vivo-signaling-and-composite-response-signature
#1
Erik S Knudsen, Jack Hutcheson, Paris Vail, Agnieszka K Witkiewicz
Recently developed potent and selective CDK4/6 inhibitors fall into two classes based on structure and toxicity profiles in clinical studies. One class, exemplified by palbociclib and ribociclib, exhibits neutropenia as a dose-limiting toxicity and requires discontinuous dosing. In contrast, the structurally distinct CDK4/6 inhibitor abemaciclib is dosed continuously, and has diarrhea and fatigue as dose-limiting toxicities. In preclinical models, palbociclib has been extensively studied and induces cell cycle inhibition in an RB-dependent manner...
June 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28612231/epsilon-aminocaproic-acid-prevents-high-glucose-and-insulin-induced-invasiveness-in-mda-mb-231-breast-cancer-cells-modulating-the-plasminogen-activator-system
#2
Rubí Viedma-Rodríguez, María Guadalupe Martínez-Hernández, Luis Antonio Flores-López, Luis Arturo Baiza-Gutman
Obesity and type II diabetes mellitus have contributed to the increase of breast cancer incidence worldwide. High glucose concentration promotes the proliferation of metastatic cells, favoring the activation of the plasminogen/plasmin system, thus contributing to tumor progression. The efficient formation of plasmin is dependent on the binding of plasminogen to the cell surface. We studied the effect of ε-aminocaproic acid (EACA), an inhibitor of the binding of plasminogen to cell surface, on proliferation, migration, invasion, epithelial-mesenchymal transition (EMT), and plasminogen activation system, in metastatic MDA-MB-231 breast cancer cells grown in a high glucose microenvironment and treated with insulin...
June 13, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28542880/suicidal-death-of-erythrocytes-in-cancer-and-its-chemotherapy-a-potential-target-in-the-treatment-of-tumor-associated-anemia
#3
REVIEW
Elisabeth Lang, Rosi Bissinger, Syed M Qadri, Florian Lang
In analogy to apoptosis of nucleated cells, erythrocytes may enter eryptosis characterized by cell shrinkage and cell membrane scrambling. Eryptotic erythrocytes are rapidly cleared from circulating blood and may adhere to the vascular wall. Stimulation of eryptosis thus impairs microcirculation and leads to anemia as soon as the loss of erythrocytes cannot be fully compensated by enhanced erythropoiesis. Signaling stimulating eryptosis includes increase of cytosolic Ca(2+) -activity, ceramide, caspases, calpain, p38-kinase, protein-kinase C, Janus-activated kinase 3, casein-kinase 1α, and cyclin-dependent kinase 4...
May 23, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28535537/triggering-of-suicidal-erythrocyte-death-by-exemestane
#4
Abdulla Al Mamun Bhuyan, Rosi Bissinger, Hang Cao, Florian Lang
BACKGROUND/AIMS: The steroidal aromatase inactivator exemestane blocks estrogen biosynthesis and is thus employed for the prevention and treatment of breast cancer. Exemestane is in part effective by stimulation of suicidal cell death or apoptosis. Side effects of exemestane treatment include anemia. At least in theory, exemestane induced anemia could be secondary to stimulation of suicidal erythrocyte death or eryptosis, characterized by cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28533810/tc003132-is-essential-for-the-follicle-stem-cell-lineage-in-telotrophic-tribolium-oogenesis
#5
Matthias Teuscher, Nadi Ströhlein, Markus Birkenbach, Dorothea Schultheis, Michael Schoppmeier
BACKGROUND: Stem cells are undifferentiated cells with a potential for self-renewal, which are essential to support normal development and homeostasis. To gain insight into the molecular mechanisms underlying adult stem cell biology and organ evolution, we use the telotrophic ovary of the beetle Tribolium. To this end, we participated in a large-scale RNAi screen in the red flour beetle Tribolium, which identified functions in embryonic and postembryonic development for more than half of the Tribolium genes...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28487075/n-1h-pyrazol-3-yl-quinazolin-4-amines-as-a-novel-class-of-casein-kinase-1%C3%AE-%C3%AE%C2%B5-inhibitors-synthesis-biological-evaluation-and-molecular-modeling-studies
#6
Chandrabose Karthikeyan, Pramod Jharia, Digambar Kumar Waiker, Amy Catherine Nusbaum, Haneen Amawi, Erin Marie Kirwen, Ryann Christman, Sri Krishna Chaitanya Arudra, Laurent Meijer, Amit K Tiwari, Piyush Trivedi
Described herein is the design, synthesis and biological evaluation of a series of N-(1H-pyrazol-3-yl)quinazolin-4-amines against a panel of eight disease relevant protein kinases. The kinase inhibition results indicated that two compounds inhibited casein kinase 1δ/ε (CK1δ/ε) with some selectivity over related kinases, namely CDK5/p25, GSK-3α/β, and DYRK1A. Docking studies with 3c and 3d revealed the key interactions with desired amino acids in the ATP binding site of CK1δ. Furthermore, compound 3c also elicited selective cytotoxic activity against the pancreas ductal adenocarcinoma (PANC-1) cell line...
June 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28483348/buffalo-casein-derived-peptide-can-alleviates-h2o2-induced-cellular-damage-and-necrosis-in-fibroblast-cells
#7
Savita Devi, Naveen Kumar, Suman Kapila, Sanusi Bello Mada, Srinu Reddi, Rishika Vij, Rajeev Kapila
Oxidative stress is one of a critical pathogenic factor in the progression of aging and chronic diseases such as cancer, myocardial inflammation and diabetes. In the present scenario, peptides with short half life and more biological specificities are gaining much attention as prodrugs. Thus, the present investigation carried out to screen potential antioxidative peptide, VLPVPQK to cope with the cellular oxidative damage. Our results showed that treatment of rat fibroblast cells with 0.2mM H2O2 for 6h significantly declined different oxidative stress biomarkers such as SOD, CAT, GSH, and promoted LDH activity...
May 5, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/28436950/mre11-stability-is-regulated-by-ck2-dependent-interaction-with-r2tp-complex
#8
P von Morgen, K Burdova, T G Flower, N J O'Reilly, S J Boulton, S J Smerdon, L Macurek, Z Hořejší
The MRN (MRE11-RAD50-NBS1) complex is essential for repair of DNA double-strand breaks and stalled replication forks. Mutations of the MRN complex subunit MRE11 cause the hereditary cancer-susceptibility disease ataxia-telangiectasia-like disorder (ATLD). Here we show that MRE11 directly interacts with PIH1D1, a subunit of heat-shock protein 90 cochaperone R2TP complex, which is required for the assembly of large protein complexes, such as RNA polymerase II, small nucleolar ribonucleoproteins and mammalian target of rapamycin complex 1...
April 24, 2017: Oncogene
https://www.readbyqxmd.com/read/28288821/reversal-of-cisplatin-resistance-in-human-gastric-cancer-cells-by-a-wogonin-conjugated-pt-iv-prodrug-via-attenuating-casein-kinase-2-mediated-nuclear-factor-%C3%AE%C2%BAb-pathways
#9
Feihong Chen, Xiaodong Qin, Gang Xu, Shaohua Gou, Xiufeng Jin
Pt(IV) prodrugs, with two additional coordination sites in contrast to Pt(II) drugs, have been actively studied nowadays, for they can perform well in enhancing the accumulation and retention of the corresponding Pt(II) drugs in cancer cells. Our designed Pt(II) drug, DN604, was recently found to exhibit significant anticancer activity and low toxicity, while, wogonin, a naturally O-methylated flavones, has been widely investigated for its tumor therapeutic potential. Thus, two Pt(IV)-based prodrugs were derived by addition of a wogonin unit to the axial position of DN604 and its analogue DN603 via a linker group...
July 1, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28236970/ck1-in-developmental-signaling-hedgehog-and-wnt
#10
REVIEW
Jin Jiang
The casein kinase 1 (CK1) family of serine (Ser)/threonine (Thr) protein kinases participates in a myriad of cellular processes including developmental signaling. Hedgehog (Hh) and Wnt pathways are two major and evolutionarily conserved signaling pathways that control embryonic development and adult tissue homeostasis. Deregulation of these pathways leads to many human disorders including birth defects and cancer. Here, I review the role of CK1 in the regulation of Hh and Wnt signal transduction cascades from the membrane reception systems to the transcriptional effectors...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28230762/the-development-of-ck2-inhibitors-from-traditional-pharmacology-to-in-silico-rational-drug-design
#11
REVIEW
Giorgio Cozza
Casein kinase II (CK2) is an ubiquitous and pleiotropic serine/threonine protein kinase able to phosphorylate hundreds of substrates. Being implicated in several human diseases, from neurodegeneration to cancer, the biological roles of CK2 have been intensively studied. Upregulation of CK2 has been shown to be critical to tumor progression, making this kinase an attractive target for cancer therapy. Several CK2 inhibitors have been developed so far, the first being discovered by "trial and error testing". In the last decade, the development of in silico rational drug design has prompted the discovery, de novo design and optimization of several CK2 inhibitors, active in the low nanomolar range...
February 20, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28196025/autophagy-induced-by-cx-4945-a-casein-kinase-2-inhibitor-enhances-apoptosis-in-pancreatic-cancer-cell-lines
#12
Dae Wook Hwang, Kwang Sup So, Song Cheol Kim, Kwang-Min Park, Young-Joo Lee, Sun-Whe Kim, Chang-Min Choi, Jin Kyung Rho, Yun Jung Choi, Jae Cheol Lee
OBJECTIVES: Pancreatic cancer is the most lethal malignancy with only a few effective chemotherapeutic drugs. Because the inhibition of casein kinase 2 (CK2) has been reported as a novel therapeutic strategy for many cancers, we investigated the effects of CK2 inhibitors in pancreatic cancer cell lines. METHODS: The BxPC3, 8902, MIA PaCa-2 human pancreatic cancer cell lines, and CX-4945, a novel CK2 inhibitor, were used. Autophagy was analyzed by acridine orange staining, fluorescence microscope detection of punctuate patterns of GFP-tagged LC3 and immunoblotting for LC3...
April 2017: Pancreas
https://www.readbyqxmd.com/read/28178627/fundamentals-of-protein-and-cell-interactions-in-biomaterials
#13
REVIEW
Hammed Tanimowo Aiyelabegan, Esmaeil Sadroddiny
The extracellular matrix (ECM) is an active and complex microenvironment with outstanding biomechanical, biophysical, and biochemical characteristics, which can indirectly or directly controls cell adhesion, migration, proliferation, and differentiation, as well as partaking in regeneration and homeostasis of organs and tissues. The ECM has captivated a great deal of attention with the rapid progress of tissue engineering (TE) in the field of regenerative medicine (RM). Approaches to TE, RM and cancer therapy center on the necessity to deliver cell signals to direct cell proliferation and differentiation...
April 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28152014/apigenin-selective-ck2-inhibitor-increases-ikaros-expression-and-improves-t-cell-homeostasis-and-function-in-murine-pancreatic-cancer
#14
Nadine Nelson, Karoly Szekeres, Cristina Iclozan, Ivannie Ortiz Rivera, Andrew McGill, Gbemisola Johnson, Onyekachi Nwogu, Tomar Ghansah
Pancreatic cancer (PC) evades immune destruction by favoring the development of regulatory T cells (Tregs) that inhibit effector T cells. The transcription factor Ikaros is critical for lymphocyte development, especially T cells. We have previously shown that downregulation of Ikaros occurs as a result of its protein degradation by the ubiquitin-proteasome system in our Panc02 tumor-bearing (TB) mouse model. Mechanistically, we observed a deregulation in the balance between Casein Kinase II (CK2) and protein phosphatase 1 (PP1), which suggested that increased CK2 activity is responsible for regulating Ikaros' stability in our model...
2017: PloS One
https://www.readbyqxmd.com/read/28125685/lack-of-casein-kinase-1-delta-promotes-genomic-instability-the-accumulation-of-dna-damage-and-down-regulation-of-checkpoint-kinase-1
#15
Yoshimi Endo Greer, Bo Gao, Yingzi Yang, Andre Nussenzweig, Jeffrey S Rubin
Casein kinase 1 delta (CK1δ) is a conserved serine/threonine protein kinase that regulates diverse cellular processes. Mice lacking CK1δ have a perinatal lethal phenotype and typically weigh 30% less than their wild type littermates. However, the causes of death and small size are unknown. We observed cells with abnormally large nuclei in tissue from Csnk1d null embryos, and multiple centrosomes in mouse embryo fibroblasts (MEFs) deficient in CK1δ (MEFCsnk1d null). Results from γ-H2AX staining and the comet assay demonstrated significant DNA damage in MEFCsnk1d null cells...
2017: PloS One
https://www.readbyqxmd.com/read/28117670/exploring-the-ck2-paradox-restless-dangerous-dispensable
#16
REVIEW
Cinzia Franchin, Christian Borgo, Silvia Zaramella, Luca Cesaro, Giorgio Arrigoni, Mauro Salvi, Lorenzo A Pinna
The history of protein kinase CK2 is crowded with paradoxes and unanticipated findings. Named after a protein (casein) that is not among its physiological substrates, CK2 remained in search of its targets for more than two decades after its discovery in 1954, but it later came to be one of the most pleiotropic protein kinases. Being active in the absence of phosphorylation and/or specific stimuli, it looks unsuitable to participate in signaling cascades, but its "lateral" implication in a variety of signaling pathways is now soundly documented...
January 20, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28105499/cx4945-suppresses-the-growth-of-castration-resistant-prostate-cancer-cells-by-reducing-ar-v7-expression
#17
Chuangzhong Deng, Jieping Chen, Shengjie Guo, Yanjun Wang, Qianghua Zhou, Zaishang Li, Xingping Yang, Xingsu Yu, Zhenfeng Zhang, Fangjian Zhou, Hui Han, Kai Yao
PURPOSE: The aberrant expression of casein kinase 2 (CK2) has been reported to be involved in the tumorigenesis and progression of prostate cancer. The inhibition of CK2 activity represses androgen-dependent prostate cancer cells by attenuating the androgen receptor (AR) signaling pathway. In this study, we examined the effect of CK2 inhibition in castration-resistant prostate cancer (CRPC) cells, in which AR variants (ARVs) play a predominant role. METHODS: A newly synthetic CK2 selective inhibitor CX4945 was utilized to study the effect of CK2 inhibition in CRPC cells by CCK8 assay and colony formation assay...
January 19, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28105163/selection-of-antitumor-displayed-peptides-for-the-specific-delivery-of-the-anticancer-drug-lactaptin
#18
Anna Andreevna Nemudraya, Elena Vladimirovna Kuligina, Alexandr Alexeevich Ilyichev, Alexandr Sergeevich Fomin, Grigory Alexandrovich Stepanov, Anna Valentinovna Savelyeva, Olga Alexandrovna Koval, Vladimir Alexandrovich Richter
It has been previously demonstrated that lactaptin, the proteolytic fragment of human milk protein κ-casein, induces the death of various cultured cancer cells. The recombinant analog of lactaptin, RL2, effectively induces the apoptosis of mouse hepatocarcinoma-1 (HA-1) tumor cells in vitro and suppress the growth of HA-1 tumors and metastases in vivo. The antitumor drug Lactaptin developed on the basis of RL2 has been successful in preclinical trials. Lactaptin shows its efficiency in relation to mouse and human cancer cells and tumors...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28092746/supranutritional-selenium-intake-from-enriched-milk-casein-impairs-hepatic-insulin-sensitivity-via-attenuated-irs-pi3k-akt-signaling-and-decreased-pgc-1%C3%AE-expression-in-male-sprague-dawley-rats
#19
Priska Stahel, Julie J Kim, Scott R L Cieslar, Jenny M Warrington, Changting Xiao, John P Cant
Selenium (Se)-enriched milk provides antioxidant benefits and has therapeutic potential against cancer. However, both antidiabetic and prodiabetic effects have been attributed to Se. Our objective was to evaluate the effect of Se-enriched milk casein on insulin sensitivity in rats when given at the requirement of 0.25 ppm Se and supranutritionally on both low- and high-fat diets. Two hundred sixteen male Sprague-Dawley rats were fed low- or high-fat diets containing one, two or eight times the Se requirement in a randomized block design...
January 7, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28057520/molecular-basis-for-the-regulation-of-the-circadian-clock-kinases-ck1%C3%AE-and-ck1%C3%AE%C2%B5
#20
REVIEW
Yu Yang, Tingting Xu, Yunfei Zhang, Ximing Qin
CK1δ and CK1ε are unique in the casein kinase 1 family and play critical roles in a number of physiological intracellular pathways. In particular, these kinases are involved in composing the mammalian circadian clock by phosphorylating core clock proteins. Considering that CK1δ/ε phosphorylate other key biological molecules, such as β-catenin and p53, understanding how the kinase activity is regulated would be greatly significant, since they are potential targets to develop pharmacological agents against cancer, pain, and circadian disorders...
February 2017: Cellular Signalling
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