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https://www.readbyqxmd.com/read/28351128/nanoparticles-of-titanium-and-zinc-oxides-as-novel-agents-in-tumor-treatment-a-review
#1
Janusz Bogdan, Joanna Pławińska-Czarnak, Joanna Zarzyńska
Cancer has become a global problem. On all continents, a great number of people are diagnosed with this disease. In spite of the progress in medical care, cancer still ends fatal for a great number of the ill, either as a result of a late diagnosis or due to inefficiency of therapies. The majority of the tumors are resistant to drugs. Thus, the search for new, more effective therapy methods continues. Recently, nanotechnology has been attributed with big expectations in respect of the cancer fight. That interdisciplinary field of science creates nanomaterials (NMs) and nanoparticles (NPs) that can be applied, e...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28350990/the-putative-drp1-inhibitor-mdivi-1-is-a-reversible-mitochondrial-complex-i-inhibitor-that-modulates-reactive-oxygen-species
#2
Evan A Bordt, Pascaline Clerc, Brian A Roelofs, Andrew J Saladino, László Tretter, Vera Adam-Vizi, Edward Cherok, Ahmed Khalil, Nagendra Yadava, Shealinna X Ge, T Chase Francis, Nolan W Kennedy, Lora K Picton, Tanya Kumar, Sruti Uppuluri, Alexandrea M Miller, Kie Itoh, Mariusz Karbowski, Hiromi Sesaki, R Blake Hill, Brian M Polster
Mitochondrial fission mediated by the GTPase dynamin-related protein 1 (Drp1) is an attractive drug target in numerous maladies that range from heart disease to neurodegenerative disorders. The compound mdivi-1 is widely reported to inhibit Drp1-dependent fission, elongate mitochondria, and mitigate brain injury. Here, we show that mdivi-1 reversibly inhibits mitochondrial complex I-dependent O2 consumption and reverse electron transfer-mediated reactive oxygen species (ROS) production at concentrations (e...
March 27, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28350947/traumatic-spinal-cord-injury-repair-and-regeneration
#3
Christopher S Ahuja, Satoshi Nori, Lindsay Tetreault, Jefferson Wilson, Brian Kwon, James Harrop, David Choi, Michael G Fehlings
BACKGROUND: Traumatic spinal cord injuries (SCI) have devastating consequences for the physical, financial, and psychosocial well-being of patients and their caregivers. Expediently delivering interventions during the early postinjury period can have a tremendous impact on long-term functional recovery. PATHOPHYSIOLOGY: This is largely due to the unique pathophysiology of SCI where the initial traumatic insult (primary injury) is followed by a progressive secondary injury cascade characterized by ischemia, proapoptotic signaling, and peripheral inflammatory cell infiltration...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28350842/combination-of-mesenchymal-stem-cell-injection-with-icariin-for-the-treatment-of-diabetes-associated-erectile-dysfunction
#4
Xiyou Wang, Chuanhai Liu, Yong Xu, Ping Chen, Yue Shen, Yansheng Xu, Yubo Zhao, Weihao Chen, Xinyu Zhang, Yun Ouyang, Yi Wang, Changliang Xie, Maojun Zhou, Cuilong Liu
The present study was aimed to examine whether icariin, a traditional Chinese medicine, could improve therapeutic effects of adipose derived mesenchymal stem cells (ADSCs) for diabetes-associated erectile dysfunction (DMED). DMED were induced in rats by intraperitoneal injection of streptozotocin and confirmed by erectile function measurement. Then, rats of diabetic ED were randomly divided to receive the treatment of saline, ADSCs, icariin or ADSCs combined with icariin respectively. Compared with the treatment by ADSCs or icariin alone, intracavernosum injection of ADSCs combined with the following daily gastric gavage of icariin significantly augmented the value of ICP and ICP/MAP (p<0...
2017: PloS One
https://www.readbyqxmd.com/read/28350451/ros-switchable-polymeric-nanoplatform-with-stimuli-responsive-release-for-active-targeted-drug-delivery-to-breast-cancer
#5
Yu Zhang, Qin Guo, Sai An, Yifei Lu, Jianfeng Li, Xi He, Lisha Liu, Yujie Zhang, Tao Sun, Chen Jiang
Tumor microenvironment plays a vital role in the process of tumor development, proliferation, invasion, and metastasis. It is well acknowledged that reduction in pH, reactive oxygen species (ROS), and increased level of glucose transporter 1 (GLUT1) have become featured intracellular and extracellular biochemical markers of cancer owing to oncogenic transformation and abnormal metabolism. To establish a distinctive drug delivery system directed against the tumor microenvironment features, we develop a newly engineered polymeric nanoplatform for efficient doxorubicin (DOX) delivery with reduced systemic toxicity and high antitumor efficiency...
March 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28346820/blastomyces-dermatitidis-serine-protease-dipeptidyl-peptidase-iva-dppiva-cleaves-elr-cxc-chemokines-altering-their-effects-on-neutrophils
#6
Jenna Lorenzini, J Scott Fites, Jeniel Nett, Bruce S Klein
Blastomycosis elicits a pyogranulomatous inflammatory response, which involves a prominent recruitment of neutrophils to the site of infection. While neutrophils are efficiently recruited to the site of infection, this event is paradoxically coupled with the host's inability to control infection by Blastomyces dermatitidis, the causative agent. The mechanisms underlying this characteristic pyogranulomatous response and inability of neutrophils to kill the yeast are poorly understood. We recently reported that the fungal protease DppIVA promotes B...
March 27, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28346709/synthetic-%C3%AE-nitrostyrene-derivative-cyt-rx20-as-inhibitor-of-oral-cancer-cell-proliferation-and-tumor-growth-through-glutathione-suppression-and-reactive-oxygen-species-induction
#7
Yen-Yun Wang, Yuk-Kwan Chen, Ya-Ling Hsu, Wen-Chin Chiu, Chun-Hao Tsai, Stephen Chu-Sung Hu, Pei-Wen Hsieh, Shyng-Shiou F Yuan
BACKGROUND: The β-nitrostyrene family possesses anticancer properties. In this study, β-nitrostyrene derivative CYT-Rx20 (3'-hydroxy-4'-methoxy-β-methyl-β-nitrostyrene) was synthesized and investigated its anticancer activity in oral cancer. METHODS: Anticancer activity of CYT-Rx20 and the underlying mechanisms were analyzed using cell viability assay, reactive oxygen species (ROS) generation assay, fluorescence-activated cell sorter analysis, annexin V staining, comet assay, glutathione (GSH)/glutathione disulfide (GSSG) ratio, immunoblotting, soft agar assay, nude mice xenograft study, and immunohistochemistry...
March 27, 2017: Head & Neck
https://www.readbyqxmd.com/read/28346428/autophagy-is-required-for-cell-survival-under-l-asparaginase-induced-metabolic-stress-in-acute-lymphoblastic-leukemia-cells
#8
H Takahashi, J Inoue, K Sakaguchi, M Takagi, S Mizutani, J Inazawa
L-asparaginase has been used for more than three decades in acute lymphoblastic leukemia (ALL) patients and remains an essential drug in the treatment of ALL. Poor response to L-asparaginase is associated with increased risk of therapeutic failure in ALL. However, both the metabolic perturbation and molecular context of L-asparaginase-treated ALL cells has not been fully elucidated. Here we identify that treatment with L-asparaginase results in metabolic shutdown via the reduction of both glycolysis and oxidative phosphorylation, accompanied by mitochondrial damage and activation of autophagy...
March 27, 2017: Oncogene
https://www.readbyqxmd.com/read/28346389/artesunate-enhances-the-cytotoxicity-of-5-aminolevulinic-acid-based-sonodynamic-therapy-against-mouse-mammary-tumor-cells-in-vitro
#9
Tomohiro Osaki, Yoshihiro Uto, Masahiro Ishizuka, Tohru Tanaka, Nobuyasu Yamanaka, Tsukasa Kurahashi, Kazuo Azuma, Yusuke Murahata, Takeshi Tsuka, Norihiko Itoh, Tomohiro Imagawa, Yoshiharu Okamoto
Sonodynamic therapy (SDT) kills tumor cells through the synergistic effects of ultrasound (US) and a sonosensitizer agent. 5-Aminolevulinic acid (5-ALA) has been used as a sonodynamic sensitizer for cancer treatment. However, studies have shown that 5-ALA-based SDT has limited efficacy against malignant tumors. In this study, we examined whether artesunate (ART) could enhance the cytotoxicity of 5-ALA-based SDT against mouse mammary tumor (EMT-6) cells in vitro. In the ART, ART + US, ART + 5-ALA, and ART + 5-ALA + US groups, the cell survival rate correlated with ART concentration, and decreased with increasing concentrations of ART...
March 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28345939/macrophilone-a-structure-elucidation-total-synthesis-and-functional-evaluation-of-a-biologically-active-iminoquinone-from-the-marine-hydroid-macrorhynchia-philippina
#10
Katherine Zlotkowski, William M Hewitt, Pengcheng Yan, Heidi R Bokesch, Megan L Peach, Marc C Nicklaus, Barry R O'Keefe, James B McMahon, Kirk R Gustafson, John S Schneekloth
A previously uncharacterized pyrroloiminoquinone natural product, macrophilone A, was isolated from the stinging hydroid Macrorhynchia philippina. The structure was assigned utilizing long-range NMR couplings and DFT calculations and proved by a concise, five-step total synthesis. Macrophilone A and a synthetic analogue displayed potent biological activity, including increased intracellular reactive oxygen species levels and submicromolar cytotoxicity toward lung adenocarcinoma cells.
March 27, 2017: Organic Letters
https://www.readbyqxmd.com/read/28345875/reactive-oxygen-species-synergize-to-potently-and-selectively-induce-cancer-cell-death
#11
Hyang Yeon Lee, Elizabeth I Parkinson, Carlotta Granchi, Ilaria Paterni, Dipak Panigrahy, Pankaj Seth, Filippo Minutolo, Paul J Hergenrother
A distinctive feature of cancer cells is their elevated levels of reactive oxygen species (ROS), a trait that can cause cancer cells to be more sensitive to ROS-inducing agents than normal cells. ROS takes several forms, each with different reactivity and downstream consequence. Here we show that simultaneous generation of superoxide and hydrogen peroxide within cancer cells results in significant synergy, causing potent and selective cancer cell death. In these experiments superoxide is generated using the NAD(P)H quinone oxidoreductase 1 (NQO1) substrate deoxynyboquinone (DNQ), and hydrogen peroxide is generated using the lactate dehydrogenase A (LDH-A) inhibitor NHI-Glc-2...
March 27, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28345852/layer-number-dependent-antibacterial-and-osteogenic-behaviors-of-graphene-oxide-electrophoretic-deposited-on-titanium
#12
Jiajun Qiu, Hao Geng, Donghui Wang, Shi Qian, Hongqin Zhu, Yuqin Qiao, Wenhao Qian, Xuanyong Liu
Graphene oxide has attracted widespread attentions in the biomedical fields due to its excellent biocompatibility. Herein we investigated the layer-number dependent antibacterial and osteogenic behaviors of graphene oxide in biointerfaces. Graphene oxide with different layer numbers was deposited on the titanium surfaces by cathodal electrophoretic deposition with varied deposition voltages. The initial cell adhesion and spreading, cell proliferation and osteogenic differentiation were observed from all the samples using rat bone mesenchymal stem cells...
March 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28344907/grape-seed-proanthocyanidin-extract-protects-lymphocytes-against-histone-induced-apoptosis
#13
Ping Chang, Bing Mo, David M Cauvi, Ying Yu, Zhenhui Guo, Jian Zhou, Qiong Huang, Qitao Yan, Guiming Chen, Zhanguo Liu
Apoptosis of lymphocytes is associated with immunosuppression and poor prognosis in sepsis. Our previous report showed that histones, nuclear proteins released from damaged or dying cells in sepsis, can mediate lymphocyte apoptosis via mitochondria damage. Grape seed proanthocyanidin extract (GSPE), a natural substance with protective properties against oxidative stress, plays a vital role in cell and mitochondria protection. We thus hypothesized that GSPE may play a protective role in histone-induced lymphocyte apoptosis through its anti-oxidative properties...
2017: PeerJ
https://www.readbyqxmd.com/read/28344645/mimicking-lichens-incorporation-of-yeast-strains-together-with-sucrose-secreting-cyanobacteria-improves-survival-growth-ros-removal-and-lipid-production-in-a-stable-mutualistic-co-culture-production-platform
#14
Tingting Li, Chien-Ting Li, Kirk Butler, Stephanie G Hays, Michael T Guarnieri, George A Oyler, Michael J Betenbaugh
BACKGROUND: The feasibility of heterotrophic-phototrophic symbioses was tested via pairing of yeast strains Cryptococcus curvatus, Rhodotorula glutinis, or Saccharomyces cerevisiae with a sucrose-secreting cyanobacterium Synechococcus elongatus. RESULTS: The phototroph S. elongatus showed no growth in standard BG-11 medium with yeast extract, but grew well in BG-11 medium alone or supplemented with yeast nitrogen base without amino acids (YNB w/o aa). Among three yeast species, C...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28344560/nitric-oxide-has-a-concentration-dependent-effect-on-the-cell-cycle-acting-via-ein2-in-arabidopsis-thaliana-cultured-cells
#15
Galina V Novikova, Luis A J Mur, Alexander V Nosov, Artem A Fomenkov, Kirill S Mironov, Anna S Mamaeva, Evgeny S Shilov, Victor Y Rakitin, Michael A Hall
Ethylene is known to influence the cell cycle (CC) via poorly characterized roles whilst nitric oxide (NO) has well-established roles in the animal CC but analogous role(s) have not been reported for plants. As NO and ethylene signaling events often interact we examined their role in CC in cultured cells derived from Arabidopsis thaliana wild-type (Col-0) plants and from ethylene-insensitive mutant ein2-1 plants. Both NO and ethylene were produced mainly during the first 5 days of the sub-cultivation period corresponding to the period of active cell division...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28344555/drug-repurposing-of-the-anthelmintic-niclosamide-to-treat-multidrug-resistant-leukemia
#16
Sami Hamdoun, Philipp Jung, Thomas Efferth
Multidrug resistance, a major problem that leads to failure of anticancer chemotherapy, requires the development of new drugs. Repurposing of established drugs is a promising approach for overcoming this problem. An example of such drugs is niclosamide, a known anthelmintic that is now known to be cytotoxic and cytostatic against cancer cells. In this study, niclosamide showed varying activity against different cancer cell lines. It revealed better activity against hematological cancer cell lines CCRF-CEM, CEM/ADR5000, and RPMI-8226 compared to the solid tumor cell lines MDA-MB-231, A549, and HT-29...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28344121/brevibacillus-laterosporus-pathogenesis-and-local-immune-response-regulation-in-the-house-fly-midgut
#17
Maria Elena Mura, Luca Ruiu
The insect midgut represents the primary site of action of the entompathogenic bacterium Brevibacillus laterosporus. Whilst most studies on this microorganism focus on the identification and characterization of possible virulence factors and toxins, little is known about the insect immune defense mechanisms that are activated against this pathogen. In this study we have investigated the local immune response of different house fly stages to B. laterosporus at the transcriptional level, and we tested the hypothesis that an improvement in entomopathogenicity can be achieved by impairing host innate immunity...
March 23, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28344061/compartmentation-of-mitochondrial-and-oxidative-metabolism-in-growing-hair-follicles-a-ring-of-fire
#18
John J Lemasters, Venkat K Ramshesh, Gregory L Lovelace, John Lim, Graham D Wright, Duane Harland, Thomas L Dawson
Little is known about the energetics of growing hair follicles, particularly in the mitochondrially abundant bulb. Here, mitochondrial and oxidative metabolism was visualized by multiphoton and light sheet microscopy in cultured bovine hair follicles and plucked human hairs. Mitochondrial membrane potential (ΔΨ), cell viability, reactive oxygen species (ROS) and secretory granules were assessed with parameter-indicating fluorophores. In growing follicles, lower bulb epithelial cells had high viability, and mitochondria were polarized...
March 23, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28343998/carnosic-acid-ca-attenuates-collagen-induced-arthritis-in-db-db-mice-via-inflammation-suppression-by-regulating-ros-dependent-p38-pathway
#19
Guangtao Xia, Xia Wang, Hongsheng Sun, Yuhong Qin, Min Fu
Rheumatoid arthritis (RA) is a multifactorial autoimmune disease, characterized by inflammation of synovial joints. Carnosic acid (CA) is a phenolic diterpene isolated from Rosmarinus officinails, playing a central role in cytoprotective responses to oxidative stress and inflammation response. Our study aimed to investigate the effects of CA on RA progression in diabetic animals. Carnosic acid (CA) was used to treat collagen-induced arthritis (CIA)-induced db/db mice. Blood glucose, oral glucose tolerance test (OGTT) and insulin tolerance test (ITT) were investigated to explore insulin resistance...
March 23, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28343997/dna-double-strand-breaks-and-aurora-b-mislocalization-induced-by-exposure-of-early-mitotic-cells-to-h2o2-appear-to-increase-chromatin-bridges-and-resultant-cytokinesis-failure
#20
Min-Guk Cho, Ju-Hyun Ahn, Hee-Song Choi, Jae-Ho Lee
Aneuploidy, an abnormal number of chromosomes that is a hallmark of cancer cells, can arise from tetraploid/binucleated cells through a failure of cytokinesis. Reactive oxygen species (ROS) have been implicated in various diseases, including cancer. However, the nature and role of ROS in cytokinesis progression and related mechanisms has not been clearly elucidated. Here, using time-lapse analysis of asynchronously growing cells and immunocytochemical analyses of synchronized cells, we found that hydrogen peroxide (H2O2) treatment at early mitosis (primarily prometaphase) significantly induced cytokinesis failure...
March 24, 2017: Free Radical Biology & Medicine
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