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https://www.readbyqxmd.com/read/29774081/g9a-stimulates-crc-growth-by-inducing-p53-lys373-dimethylation-dependent-activation-of-plk1
#1
Jie Zhang, Yafang Wang, Yanyan Shen, Pengxing He, Jian Ding, Yi Chen
Rationale: G9a is genetically deregulated in various tumor types and is important for cell proliferation; however, the mechanism underlying G9a-induced carcinogenesis, especially in colorectal cancer (CRC), is unclear. Here, we investigated if G9a exerts oncogenic effects in CRC by increasing polo-like kinase 1 (Plk1) expression. Thus, we further characterized the detailed molecular mechanisms. Methods: The role of Plk1 in G9a aberrant CRC was determined by performing different in vitro and in vivo assays, including assessment of cell growth by performing cell viability assay and assessment of signaling transduction profiles by performing immunoblotting, in the cases of pharmacological inhibition or short RNA interference-mediated suppression of G9a...
2018: Theranostics
https://www.readbyqxmd.com/read/29771424/knockdown-of-plk1-inhibits-invasion-and-promotes-apoptosis-in-glioma-cells-through-regulating-autophagy
#2
Z-Y Wu, N Wei
OBJECTIVE: Polo like kinase 1 (PLK1), an oncogene, is a ubiquitously expressed serine/threonine protein kinase. We aimed at investigating the role of PLK1 in glioma. PATIENTS AND METHODS: Clinical glioma specimens were obtained from Zhejiang Hospital (Hangzhou, Zhejiang, China). The mRNA and protein levels of PLK1 in glioma tissues and different glioma cells were analyzed by Real-time PCR and Western blot, respectively. The expression of PLK1 protein in glioma tissues was also determined by immunohistochemistry staining...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29768277/the-brief-sexual-symptom-checklist-as-a-screening-tool-for-sex-related-problems-in-the-primary-care-setting-focus-on-erectile-dysfunction
#3
Javier Romero Otero, Borja García Gómez, José Medina Polo, Esther García Rojo, Eduardo García Cruz, Francois Peinado, Raquel Sopeña Sutil, Giorgio Bozzini, Alfredo Rodríguez Antolín
PURPOSE: To assess the performance of the Brief Sexual Symptom Checklist for men (BSSC-M) questionnaire in General Practitioner's (GP) consults in Spain. METHODS: Multicenter, cross-sectional study conducted in Spain among men ≥50 years, visiting a GP for any reason, and being able to answer self-administered questionnaires. Patients receiving medicines for erectile dysfunction (ED) and those with poor functional status were excluded. Sexual satisfaction was assessed by the BSSC-M, ED by the Sexual Health Inventory for Men (SHIM), and quality of life (QoL) using a 5-point Likert scale...
May 16, 2018: Urologia Internationalis
https://www.readbyqxmd.com/read/29767505/tuned-density-of-anti-tissue-factor-antibody-fragment-onto-sirna-loaded-polyion-complex-micelle-for-optimizing-targetability-into-pancreatic-cancer-cells
#4
Hyun Su Min, Hyun Jin Kim, Jooyeon Ahn, Mitsuru Naito, Kotaro Hayashi, Kazuko Toh, Beob Soo Kim, Yasuhiro Matsumura, Ick Chan Kwon, Kanjiro Miyata, Kazunori Kataoka
Antibody fragment (Fab')-installed polyion complex (PIC) micelles were constructed to improve targetability of small interfering RNA (siRNA) delivery to pancreatic cancer cells. To this end, we synthesized a block copolymer of azide-functionalized poly(ethylene glycol) (PEG) and poly(L-lysine) (PLL), and prepared PIC micelles with siRNA. Then, a dibenzylcyclooctyne (DBCO)-modified anti-human tissue factor (TF) Fab' was conjugated to azido groups on the micellar surface. A fluorescence correlation spectroscopic (FCS) analysis revealed that 1, 2, or 3 molecule(s) of Fab'(s) were installed onto one micellar nanoparticle according to the feeding ratio of Fab' (or DBCO) to micelle (or azide)...
May 16, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29764989/global-assessment-of-its-network-dynamics-reveals-that-the-kinase-plk1-inhibits-the-phosphatase-pp6-to-promote-aurora-a-activity
#5
Arminja N Kettenbach, Kate A Schlosser, Scott P Lyons, Isha Nasa, Jiang Gui, Mark E Adamo, Scott A Gerber
Polo-like kinase 1 (Plk1) is an essential protein kinase that promotes faithful mitotic progression in eukaryotes. The subcellular localization and substrate interactions of Plk1 are tightly controlled and require its binding to phosphorylated residues. To identify phosphorylation-dependent interactions within the Plk1 network in human mitotic cells, we performed quantitative proteomics on HeLa cells cultured with kinase inhibitors or expressing a Plk1 mutant that was deficient in phosphorylation-dependent substrate binding...
May 15, 2018: Science Signaling
https://www.readbyqxmd.com/read/29764941/a-trypanosome-specific-protein-cooperates-with-the-cif1-protein-to-promote-cytokinesis-in-trypanosoma-brucei
#6
Yasuhiro Kurasawa, Huiqing Hu, Qing Zhou, Ziyin Li
Cytokinesis, the terminal step in cell division, in the protist human pathogen Trypanosoma brucei occurs along the longitudinal axis from the anterior tip of the new flagellum attachment zone (FAZ) towards the posterior cell tip. This process is regulated by a signaling cascade composed of the Polo-like kinase homolog TbPLK, the Aurora B kinase homolog TbAUK1, and the trypanosome-specific CIF1-CIF2 protein complex. However, the regulatory mechanism and the signaling pathway for this unusual mode of cytokinesis remain poorly understood...
May 15, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29764400/low-cost-hpv-testing-and-the-prevalence-of-cervical-infection-in-asymptomatic-populations-in-guatemala
#7
Hong Lou, Eduardo Gharzouzi, Sarita Polo Guerra, Joël Fokom Domgue, Julie Sawitzke, Guillermo Villagran, Lisa Garland, Joseph F Boland, Sarah Wagner, Héctor Rosas, Jami Troxler, Heidi McMillen, Bailey Kessing, Enrique Alvirez, Miriam Castillo, Hesler Morales, Victor Argueta, Andert Rosingh, Femke J H B van Aerde-van Nunen, Griselda Lopez, Herbert M Pinedo, Mark Schiffman, Michael Dean, Roberto Orozco
BACKGROUND: A low cost and accurate method for detecting high-risk (HR) human papillomavirus (HPV) is important to permit HPV testing for cervical cancer prevention. We used a commercially available HPV method (H13, Hybribio) which was documented to function accurately in a reduced volume of cervical specimen to determine the most prevalent HPV types and the distribution of HPV infections in over 1795 cancer-free women in Guatemala undergoing primary screening for cervical cancer by cytology...
May 15, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29756611/cochlear-obliteration-following-a-translabyrinthine-approach-and-its-implications-in-cochlear-implantation
#8
B Delgado-Vargas, M Medina, R Polo, A Lloris, M Vaca, C Pérez, A Cordero, I Cobeta
The most frequent sequelae following a translabyrinthine approach for vestibular schwannoma resection is complete hearing loss on the affected side. Such patients could benefit from a cochlear implant, provided that two essential requisites are met before surgery: a preserved cochlear nerve and a patent cochlea to accommodate the electrode array. The goal of our study is to determine the prevalence and extent of cochlear ossification following a translabyrinthine approach. Postoperative MRI of 41 patients were retrospectively reviewed...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29755309/targeted-delivery-of-crispr-cas9-mediated-cancer-gene-therapy-via-liposome-templated-hydrogel-nanoparticles
#9
Zeming Chen, Fuyao Liu, Yanke Chen, Jun Liu, Xiaoying Wang, Ann T Chen, Gang Deng, Hongyi Zhang, Jie Liu, Zhangyong Hong, Jiangbing Zhou
Due to its simplicity, versatility, and high efficiency, the clustered regularly interspaced short palindromic repeat (CRISPR)/Cas9 technology has emerged as one of the most promising approaches for treatment of a variety of genetic diseases, including human cancers. However, further translation of CRISPR/Cas9 for cancer gene therapy requires development of safe approaches for efficient, highly specific delivery of both Cas9 and single guide RNA to tumors. Here, novel core-shell nanostructure, liposome-templated hydrogel nanoparticles (LHNPs) that are optimized for efficient codelivery of Cas9 protein and nucleic acids is reported...
December 8, 2017: Advanced Functional Materials
https://www.readbyqxmd.com/read/29753186/combination-of-pi3k-akt-pathway-inhibition-and-plk1-depletion-can-enhance-chemosensitivity-to-gemcitabine-in-pancreatic-carcinoma
#10
Yonghuan Mao, Ling Xi, Quan Li, Sheng Wang, Zeling Cai, Xinhua Zhang, Chunzhao Yu
The prognosis of pancreatic cancer (PC) remains pessimistic because of the difficulty in early diagnosis as well as the little advance in chemotherapy. Although being the first-line chemotherapy drug for PC at present, gemcitabine still has some disadvantages, such as low drug sensitivity and significant side effects. Thus, how to further improve the sensitivity of PC cells to gemcitabine is still a difficult subject in the field of pancreatic cancer-treatment. Polo-like kinase 1 (Plk1) is closely related to poor outcome in many malignant tumors and its high expression is linked to chemoresistance in PC...
May 9, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29749476/mir%C3%A2-23a-suppresses-pancreatic-cancer-cell-progression-by-inhibiting-plk%C3%A2-1-expression
#11
Bin Chen, Akao Zhu, Lei Tian, Ying Xin, Xinchun Liu, Yunpeng Peng, Jingjing Zhang, Yi Miao, Jishu Wei
The present study aimed to explore the effects and underlying mechanisms of microRNA (miR)‑23a on pancreatic cancer (PC) cells progression. Reverse transcription‑quantitative polymerase chain reaction and western blot analysis were used to detect the mRNA and protein miR‑23a and PLK‑1 level. Cell viability, cell cycle, migration and invasion assasy, and in vivo tumorigenicity assay were used to investigate the effects of miR‑204. Further luciferase reporter assay was used to explore the mechanisms contributing to miR‑204 effects...
April 27, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29742257/a-serm-increasing-the-expression-of-the-osteoblastogenesis-and-mineralization-related-proteins-and-improving-quality-of-bone-tissue-in-an-experimental-model-of-osteoporosis
#12
Fernanda Costa Yogui, Gustavo Antonio Correa Momesso, Leonardo Perez Faverani, Tarik Ocon Braga Polo, Gabriel Ramalho-Ferreira, Jaqueline Suemi Hassumi, Ana Cláudia Rossi, Alexandre Rodrigues Freire, Felippe Bevilacqua Prado, Roberta Okamoto
Raloxifene is an antiresorptive drug, selective estrogen receptor modulator (SERM) used in the treatment of osteoporosis. Objective To evaluate proteins related to bone repair at the peri-implant bone in a rat model of osteoporosis treated with raloxifene. Material and Methods 72 rats were divided into three groups: SHAM (healthy animals), OVX (ovariectomized animals), and RLX (ovariectomized animals treated with raloxifene). Raloxifene was administered by gavage (1 mg/kg/day). Tibial implantation was performed 30 days after ovariectomy, and animals were euthanized at 14, 42, and 60 days postoperatively...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29741478/srsf3-promotes-pluripotency-through-nanog-mrna-export-and-coordination-of-the-pluripotency-gene-expression-program
#13
Madara Ratnadiwakara, Stuart K Archer, Craig I Dent, Igor Ruiz de Los Mozos, Traude H Beilharz, Anja S Knaupp, Christian M Nefzger, Jose M Polo, Minna-Liisa Anko
The establishment and maintenance of pluripotency depend on precise coordination of gene expression. We establish serine-arginine rich splicing factor 3 (SRSF3) as an essential regulator of RNAs encoding key components of the mouse pluripotency circuitry, SRSF3 ablation resulting in the loss of pluripotency and its overexpression enhancing reprogramming. Strikingly, SRSF3 binds to the core pluripotency transcription factor Nanog mRNA to facilitate its nucleo-cytoplasmic export independent of splicing. In the absence of SRSF3 binding, Nanog mRNA is sequestered in the nucleus and protein levels are severely downregulated...
May 9, 2018: ELife
https://www.readbyqxmd.com/read/29738867/pharmacoinformatics-approach-for-the-identification-of-polo-like-kinase-1-inhibitors-from-natural-sources-as-anti-cancer-agents
#14
Mohamed F AlAjmi, Md Tabish Rehman, Afzal Hussain, Gulam Mohmad Rather
Polo-like kinase-1 (PLK-1) plays a key role in cell cycle progression during mitosis. Overexpression/dysfunction of PLK-1 is directly associated with cancerous transformation and has been reported in different cancer types. Here, we employed high throughput virtual screening and molecular docking to screen Selleck's natural compound library against PLK-1 kinase domain. We have identified eight bioactive compounds (Apigenin, Dihydromyricetin, Diosmetin, Hesperidin, Hesperitin, Naringenin, Phlorizi, and Quercetin) as the potential inhibitors of PLK-1...
May 5, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29726052/enantioselective-non-covalent-substrate-directable-heck-matsuda-and-oxidative-heck-arylations-of-unactivated-five-membered-carbocyclic-olefins
#15
Carlos Duarte Correia, Juliana Oliveira, Ricardo Almir Angnes, Ismat Ullah Khan, Ellen Christine Polo, Gabriel Heerdt, Bruno Servilha, Vitor Silva, Ataualpa Braga
Highly diastereo and enantioselective non-covalent substrate directable Heck desymmetrizations of cyclopentenyl olefins bearing hydroxymethyl and carboxylate functional groups are presented. These conformationally unbiased cyclic olefins underwent effective arylations in yields of up to 97%, diastereoselectivity up to >20:1, and enantiomeric excesses of up to 99%. Non-covalent directing effects were shown to be present in Heck-Matsuda and oxidative Heck reactions allowing the preferential formation of cis-substituted aryl cyclopentenes containing two stereocenters, including quaternary stereocenters...
May 3, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29722913/the-tsc1-mtor-plk-axis-regulates-the-homeostatic-switch-from-schwann-cell-proliferation-to-myelination-in-a-stage-specific-manner
#16
Minqing Jiang, Rohit Rao, Jincheng Wang, Jiajia Wang, Lingli Xu, Lai Man Wu, Jonah R Chan, Huimin Wang, Q Richard Lu
Proper peripheral myelination depends upon the balance between Schwann cell proliferation and differentiation programs. The serine/threonine kinase mTOR integrates various environmental cues to serve as a central regulator of cell growth, metabolism, and function. We report here that tuberous sclerosis complex 1 (TSC1), a negative regulator of mTOR activity, establishes a stage-dependent program for Schwann cell lineage progression and myelination by controlling cell proliferation and myelin homeostasis. Tsc1 ablation in Schwann cell progenitors in mice resulted in activation of mTOR signaling, and caused over-proliferation of Schwann cells and blocked their differentiation, leading to hypomyelination...
May 3, 2018: Glia
https://www.readbyqxmd.com/read/29721607/hydrogen-sulphide-facilitates-exocytosis-by-regulating-the-handling-of-intracellular-calcium-by-chromaffin-cells
#17
Ricardo de Pascual, Andrés M Baraibar, Iago Méndez-López, Martín Pérez-Ciria, Ignacio Polo-Vaquero, Luis Gandía, Sunny E Ohia, Antonio G García, Antonio M G de Diego
Gasotransmitter hydrogen sulphide (H2 S) has emerged as a regulator of multiple physiological and pathophysiological processes throughout. Here, we have investigated the effects of NaHS (fast donor of H2 S) and GYY4137 (GYY, slow donor of H2 S) on the exocytotic release of catecholamines from fast-perifused bovine adrenal chromaffin cells (BCCs) challenged with sequential intermittent pulses of a K+ -depolarizing solution. Both donors caused a concentration-dependent facilitation of secretion. This was not due to an augmentation of Ca2+ entry through voltage-activated Ca2+ channels (VACCs) because, in fact, NaHS and GYY caused a mild inhibition of whole-cell Ca2+ currents...
May 2, 2018: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29719501/acetylome-in-human-fibroblasts-from-parkinson-s-disease-patients
#18
Sokhna M S Yakhine-Diop, Mario Rodríguez-Arribas, Guadalupe Martínez-Chacón, Elisabet Uribe-Carretero, Rubén Gómez-Sánchez, Ana Aiastui, Adolfo López de Munain, José M Bravo-San Pedro, Mireia Niso-Santano, Rosa A González-Polo, José M Fuentes
Parkinson's disease (PD) is a multifactorial neurodegenerative disorder. The pathogenesis of this disease is associated with gene and environmental factors. Mutations in leucine-rich repeat kinase 2 (LRRK2) are the most frequent genetic cause of familial and sporadic PD. Moreover, posttranslational modifications, including protein acetylation, are involved in the molecular mechanism of PD. Acetylation of lysine proteins is a dynamic process that is modulated in PD. In this descriptive study, we characterized the acetylated proteins and peptides in primary fibroblasts from idiopathic PD (IPD) and genetic PD harboring G2019S or R1441G LRRK2 mutations...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29716963/plk1-inhibition-enhances-the-efficacy-of-bet-epigenetic-reader-blockade-in-castration-resistant-prostate-cancer
#19
Fengyi Mao, Jie Li, Qian Luo, Ruixin Wang, Yifan Kong, Colin Carlock, Zian Liu, Bennett D Elzey, Xiaoqi Liu
Polo-like kinase 1 (Plk1), a crucial regulator of cell cycle progression, is overexpressed in multiple types of cancers, and has been proven to be a potent and promising target for cancer treatment. In case of prostate cancer, we once showed that anti-neoplastic activity of Plk1 inhibitor is largely due to inhibition of androgen receptor (AR) signaling. However, we also discovered that Plk1 inhibition causes activation of the β-catenin pathway and increased ex-pression of c-Myc, eventually resulting in resistance to Plk1 inhibition...
May 1, 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29713246/autophagy-inhibition-improves-the-cytotoxic-effects-of-receptor-tyrosine-kinase-inhibitors
#20
Sanja Aveic, Marcella Pantile, Pierfrancesco Polo, Viktoryia Sidarovich, Marilena De Mariano, Alessandro Quattrone, Luca Longo, Gian Paolo Tonini
Background: A growing field of evidence suggests the involvement of oncogenic receptor tyrosine kinases (RTKs) in cell transformation. Deregulated activity of RTKs in tumors can determine disease progression and therapeutic responses in several types of cancer, including neuroblastoma (NB). Therefore, RTKs targeting is a worthwhile challenge for the oncologists. Nevertheless, acquired resistance to RTK inhibitors (RTKi) remains a serious problem. Autophagy activation is among the possible obstacles for good efficacy of the therapy with RTKi...
2018: Cancer Cell International
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