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https://www.readbyqxmd.com/read/28088698/metformin-enhancing-the-antitumor-efficacy-of-carboplatin-against-ehrlich-solid-carcinoma-grown-in-diabetic-mice-effect-on-igf-1-and-tumoral-expression-of-igf-1-receptors
#1
Dina M Abo-Elmatty, Eman A Ahmed, Mona K Tawfik, Seham A Helmy
Diabetes has been listed as a risk factor for various types of cancer. Cancer cell development can be promoted by increased levels of IGF-1 and hyperinsulinemia that are associated with diabetes type II. Metformin is an anti-diabetic agent and its potential antitumor impact has become the objective of numerous studies. In this vein, we hypothesize that using metformin in diabetes type II mice may synergistic with carboplatin for reducing the risk of cancer. Therefore, the study aimed to evaluate the in vivo antitumor activity of metformin against solid EAC tumor growth in female diabetic mice and its potential pro-apoptotic and anti-proliferative effects with clarification of its inconclusive biological mechanisms...
January 12, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28088622/reactive-oxygen-species-and-cancer-paradox-to-promote-or-to-suppress
#2
REVIEW
Sehamuddin Galadari, Anees Rahman, Siraj Pallichankandy, Faisal Thayyullathil
Reactive oxygen species (ROS), a group of highly reactive ions and molecules, are increasingly being appreciated as powerful signaling molecules involved in the regulation of a variety of biological processes. Indeed, their role is continuously being delineated in a variety of pathophysiological conditions. For instance, cancer cells are shown to have increased ROS levels in comparison to their normal counterparts. This is partly due to an enhanced metabolism and mitochondrial dysfunction in cancer cells. The escalated ROS generation in cancer cells contributes to the biochemical and molecular changes necessary for the tumor initiation, promotion and progression, as well as, tumor resistance to chemotherapy...
January 11, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28088445/synthesis-and-exploration-of-novel-radiolabeled-bombesin-peptides-for-targeting-receptor-positive-tumor
#3
Kakali De, Indranil Banerjee, Samarendu Sinha, Shantanu Ganguly
Increasing evidence of peptide receptor overexpression in various cancer cells, warrant the development of receptor specific radiolabeled peptides for molecular imaging and therapy in nuclear medicine. Gastrin-releasing-peptide (GRP) receptor, are overexpressed in a variety of human cancer cells. The present study report the synthesis and biological evaluation of new bombesin (BBN) analogs, HYNIC-Asp-[Phe(13)]BBN(7-13)-NH-CH2-CH2-CH3:BA1, HYNIC-Pro-[Tyr(13)Met(14)]BBN(7-14)NH2:BA2 as prospective tumor imaging agent with compare to BBN(7-14)NH2:BS as standard...
January 11, 2017: Peptides
https://www.readbyqxmd.com/read/28087917/-reasearch-progress-on-the-role-of-neutrophils-in-asthma
#4
Tingting Li, Yuehai Ke, Hongqiang Cheng
Asthma is a phenotypically heterogeneous chronic disease of the airways. Studies have found that neutrophils are crucial to airway inflammation in acute asthma, persistent asthma, particularly in asthma of poor response to glucocorticoid treatment. The role of neutrophils in development of bronchial asthma is complex, as they can release a potent source of cytokines and inflammatory mediators participating in asthma. Differing from eosinophilic inflammatory asthma, neutrophilic inflammatory asthma is not depend on helper T (Th)2 cells, but may be related to Th1 and Th17 cells...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28087534/mechanisms-of-horizontal-cell-to-cell-transfer-of-wolbachia-spp-in-drosophila-melanogaster
#5
Pamela M White, Jose E Pietri, Alain Debec, Shelbi Russell, Bhavin Patel, William Sullivan
: Wolbachia is an intracellular endosymbiont present in most arthropod and filarial nematode species. Transmission between hosts is primarily vertical, taking place exclusively through the female germline, though horizontal transmission has also been documented. Several studies indicate that Wolbachia is capable of transfer between somatic and germline cells during nematode development and in adult flies. However, the mechanisms underlying horizontal cell-to-cell transfer remain largely unexplored...
January 13, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28087256/manganese-superoxide-dismutase-and-glutathione-peroxidase-1-contribute-to-the-rise-and-fall-of-mitochondrial-reactive-oxygen-species-which-drive-oncogenesis
#6
REVIEW
Dede N Ekoue, Chenxia He, Alan M Diamond, Marcelo G Bonini
Reactive oxygen species (ROS) largely originating in the mitochondria play essential roles in the metabolic and (epi)genetic reprogramming of cancer cell evolution towards more aggressive phenotypes. Recent studies have indicated that the activity of superoxide dismutase (SOD2) may promote tumor progression by serving as a source of hydrogen peroxide (H2O2). H2O2 is a form of ROS that is particularly active as a redox agent affecting cell signaling due to its ability to freely diffuse out of the mitochondria and alter redox active amino acid residues on regulatory proteins...
January 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28079919/copper-oxide-nanoparticles-and-copper-sulphate-act-as-antigenotoxic-agents-in-drosophila-melanogaster
#7
Mohamed Alaraby, Alba Hernández, Ricard Marcos
The biological reactivity of metal and metal oxide nanomaterials is attributed to their redox properties, which would explain their pro- or anti-cancer properties depending on exposure circumstances. In this sense, copper oxide nanoparticles (CuONP) have been proposed as a potential anti-tumoral agent. The aim of this study was to assess if CuONP can exert antigenotoxic effects using Drosophila melanogaster as an in vivo model. Genotoxicity was induced by two well-known genotoxic compounds, namely potassium dichromate (PD) and ethyl methanesulfonate (EMS)...
January 12, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28079286/design-synthesis-biological-evaluation-and-3d-qsar-analysis-of-podophyllotoxin-dioxazole-combination-as-tubulin-targeting-anticancer-agents
#8
Zi-Zhen Wang, Wen-Xue Sun, Xue Wang, Ya-Han Zhang, Han-Yue Qiu, Jin-Liang Qi, Yan-Jun Pang, Gui-Hua Lu, Xiao-Ming Wang, Fu-Gen Yu, Yong-Hua Yang
The advancement of cancer fighting drugs has never been a simple linear process. Those drugs design professionals begin to find inspiration from the nature after failing to find the ideal products by creative drugs design and high-throughput screening. To obtain new molecules for inhibiting tubulin, podophyllotoxin was adopted as the leading compound and 1,3,4-oxadiazole was brought in to the C-4 site of podophyllotoxin in this research. A series of seventeen podophyllotoxin derived esters have been achieved and then evaluated their antitumor activities against four different cancer cell lines: A549, MCF-7, HepG2 and HeLa...
January 12, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28078994/modulation-of-tumour-related-signaling-pathways-by-natural-pentacyclic-triterpenoids-and-their-semisynthetic-derivatives
#9
Andrey V Markov, Evgeniya B Logashenko, Marina A Zenkova
Pentacyclic triterpenoids are a large class of natural isoprenoids that are widely biosynthesized in higher plants. These compounds are potent anticancer agents that exhibit antiproliferative, antiangiogenic, antiinflammatory and proapoptotic activities. Although their effects on multiple pathways have been reported, unifying mechanisms of action have not yet been established. To date, a huge number of semisynthetic derivatives have been synthesized in different laboratories on the basis of triterpenoid scaffolds, and many have been assayed for their biological activities...
January 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28078985/designing-isoform-selective-inhibitors-against-classical-hdacs-for-effective-anticancer-therapy-insight-and-perspectives-from-in-silico
#10
Shabir Ahmad Ganai
Histone deacetylase inhibitors, the small molecules modulating the biological activity of histone deacetylases are emerging as potent chemotherapeutic agents. Despite their considerable therapeutic benefits in disease models, the lack of isoform specificity culminates in debilitating off target effects, raising serious concerns regarding their applicability. This emphasizes the pressing and unmet medical need of designing isoform selective inhibitors for safe and effective anticancer therapy. Keeping these grim facts in view, the current article sheds light on structural basis of off-targeting...
12, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28078889/quantification-of-free-polyelectrolytes-present-in-colloidal-suspension-revealing-a-source-of-toxic-responses-for-polyelectrolyte-wrapped-gold-nanoparticles
#11
Tian A Qiu, Marco D Torelli, Ariane M Vartanian, Nathan B Rackstraw, Joseph T Buchman, Lisa M Jacob, Catherine J Murphy, Robert J Hamers, Christy L Haynes
Polyelectrolyte (PE) wrapping of colloidal nanoparticles (NPs) is a standard method to control NP surface chemistry and charge. Because excess polyelectrolytes are usually employed in the surface modification process, it is critical to evaluate different purification strategies to obtain a clean final product and thus avoid ambiguities in the source of effects on biological systems. In this work, 4 nm diameter gold nanoparticles (AuNPs) were wrapped with 15 kDa poly(allylamine hydrochloride) (PAH), and three purification strategies were applied: (a) diafiltration or either (b) one round or (c) two rounds of centrifugation...
January 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28078733/therapeutic-apheresis-in-immunologic-renal-and-neurological-diseases
#12
REVIEW
Rolf Bambauer, Reinhard Latza, Daniel Burgard, Ralf Schiel
Since the mid 1970s, when membrane modules became available, plasma separation techniques have gained in importance especially in the past few years. The advantages of this method are a complete separation of the corpuscular components from the plasma and due to increased blood flow rate and higher efficacy. Systemic autoimmune diseases based on an immune pathogenesis produce autoantibodies and circulating immune complexes, which cause inflammation in the tissues of various organs. In most cases, these diseases have a poor prognosis without treatment...
January 12, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28078656/biosimilars-for-the-treatment-of-cancer-a-systematic-review-of-published-evidence
#13
REVIEW
Ira Jacobs, Reginald Ewesuedo, Sadiq Lula, Charles Zacharchuk
BACKGROUND: Biologic treatments for cancer continue to place a significant economic burden on healthcare stakeholders. Biosimilar therapies may help reduce this burden through cost savings, thereby increasing patient access. OBJECTIVES: The purpose of this study was to collate all published data to assess the weight of available evidence (quantity and quality) for proposed monoclonal antibody biosimilars and intended copies, for the treatment of cancer. METHODS: MEDLINE(®), Embase(®), and ISI Web of Science(®) databases were searched to September 2015...
January 11, 2017: BioDrugs: Clinical Immunotherapeutics, Biopharmaceuticals and Gene Therapy
https://www.readbyqxmd.com/read/28078190/loss-of-quiescence-and-self-renewal-capacity-of-hematopoietic-stem-cell-in-an-in-vitro-leukemic-niche
#14
Natalia-Del Pilar Vanegas, Jean-Paul Vernot
BACKGROUND: Leukemic and mesenchymal stem cells interact in the leukemic microenvironment and affect each other differently. This interplay has also important implications for the hematopoietic stem cell (HSC) biology and function. This study evaluated human HSC self-renewal potential and quiescence in an in vitro leukemic niche without leukemic cells. METHODS: A leukemic niche was established by co-culturing mesenchymal stem cells with a fresh conditioned medium obtained from a leukemic (REH) cell line...
2017: Experimental Hematology & Oncology
https://www.readbyqxmd.com/read/28078051/complete-genome-sequence-of-pseudomonas-brassicacearum-strain-l13-6-12-a-biological-control-agent-from-the-rhizosphere-of-potato
#15
Christin Zachow, Henry Müller, Jana Monk, Gabriele Berg
Pseudomonas brassicacearum strain L13-6-12 is a rhizosphere colonizer of potato, lettuce and sugar beet. Previous studies have shown that this motile, Gram-negative, non-sporulating bacterium is an effective biocontrol agent against different phytopathogens. Here, we announce and describe the complete genome sequence of P. brassicacearum L13-6-12 consisting of a single 6.7 Mb circular chromosome that consists of 5773 protein coding genes and 85 RNA-only encoding genes. Genome analysis revealed genes encoding specialized functions for pathogen suppression, thriving in the rhizosphere and interacting with eukaryotic organisms...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28077462/bromodomains-in-protozoan-parasites-evolution-function-and-opportunities-for-drug-development
#16
REVIEW
Victoria Jeffers, Chunlin Yang, Sherri Huang, William J Sullivan
Parasitic infections remain one of the most pressing global health concerns of our day, affecting billions of people and producing unsustainable economic burdens. The rise of drug-resistant parasites has created an urgent need to study their biology in hopes of uncovering new potential drug targets. It has been established that disrupting gene expression by interfering with lysine acetylation is detrimental to survival of apicomplexan (Toxoplasma gondii and Plasmodium spp.) and kinetoplastid (Leishmania spp...
March 2017: Microbiology and Molecular Biology Reviews: MMBR
https://www.readbyqxmd.com/read/28077309/physical-and-biological-characteristics-of-multi-drug-resistance-mdr-an-integral-approach-considering-ph-and-drug-resistance-in-cancer
#17
REVIEW
Ziad Omran, Paula Scaife, Simon Stewart, Cyril Rauch
The role of the Warburg effect in cancer remains to be elucidated with a resurgence in research efforts over the past decade. Why a cancer cell would prefer to use energy inefficient glycolysis, leading to an alteration of pH both inside and outside of the cell, remains to be uncovered. The development of MDR represents a major challenge in the treatment of cancer and it is explained, so far, by the over expression of drug transporters such as the well-known and archetypal P-glycoprotein (Pgp). However, controversies exist regarding the function of Pgp in multi-drug resistance...
January 8, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28076860/efficacy-and-survival-of-systemic-psoriasis-treatments-an-analysis-of-the-swiss-registry-sdntt
#18
Julia-Tatjana Maul, Vahid Djamei, Antonios G A Kolios, Barbara Meier, Justine Czernielewski, Pascal Jungo, Nikhil Yawalkar, Carlo Mainetti, Emmanuel Laffitte, Christina Spehr, Mark Anliker, Markus Streit, Matthias Augustin, Stephan Rustenbach, Curdin Conrad, Jürg Hafner, Wolf-Henning Boehncke, Luca Borradori, Michel Gilliet, Peter Itin, Lars E French, Peter Häusermann, Alexander A Navarini
BACKGROUND: The Swiss psoriasis registry SDNTT (Swiss Dermatology Network for Targeted Therapies) records the long-term safety and effectiveness of systemic treatment regimens for psoriasis. PATIENTS AND METHODS: Patients with moderate to severe psoriasis are included in the SDNTT when treatment with a conventional systemic agent or biologic is initiated that was not previously used by the respective patient. Patients are followed over a 5-year period. Clinical data are obtained every 3-6 months using standardized case report forms...
January 12, 2017: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/28076683/modulation-of-cytotoxicity-by-transcription-coupled-nucleotide-excision-repair-is-independent-of-the-requirement-for-bioactivation-of-acylfulvene
#19
Claudia Otto, Graciela Spivak, Claudia Marie Nathalie Aloisi, Mirco Menigatti, Hanspeter Nägeli, Philip C Hanawalt, Marina Tanasova, Shana J Sturla
Bioactivation as well as DNA repair affect the susceptibility of cancer cells to the action of DNA-alkylating chemotherapeutic drugs. However, information is limited with regard to the relative contributions of these processes to the biological outcome of metabolically activated DNA alkylating agents. We evaluated the influence of cellular bioactivation capacity and DNA repair on cytotoxicity of the DNA alkylating agent, acylfulvene (AF). We compared cytotoxicity and RNA synthesis inhibition by AF and its synthetic activated analog iso-M0 in a panel of fibroblast cell lines with deficiencies in transcription-coupled (TC-NER) or global genome nucleotide excision repair (GG-NER)...
January 11, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28075592/total-syntheses-and-biological-activities-of-vinylamycin-analogs
#20
Jinghan Wang, Beijia Kuang, Xiaoqian Guo, Jianwei Liu, Yahui Ding, Jiangnan Li, Shende Jiang, Ying Liu, Fang Bai, Luyuan Li, Quan Zhang, Xiao-Yu Zhu, Bo Xia, Chun-Qi Li, Liang Wang, Guang Yang, Yue Chen
Natural depsipeptide vinylamycin was reported to be an antibiotic previously. Herein, we report vinylamycin to be active against K562 leukemia cells (IC50 = 4.86 μM), and be unstable in plasma (t1/2 = 0.54 h). A total of 24 vinylamycin analogs with modification of the OH group and chiral centers were generated via a combinatorial approach. The lead compound 1a was subsequently characterized as having: no anti-microbial activity, significantly higher plasma stability (t1/2 = 14.3 h), improved activity against K562 leukemia cells (IC50 = 0...
January 11, 2017: Journal of Medicinal Chemistry
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