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https://www.readbyqxmd.com/read/28632185/the-effects-of-selected-sesquiterpenes-from-myrica-rubra-essential-oil-on-the-efficacy-of-doxorubicin-in-sensitive-and-resistant-cancer-cell-lines
#1
Martin Ambrož, Petra Matoušková, Adam Skarka, Martina Zajdlová, Kateřina Žáková, Lenka Skálová
β-caryophyllene oxide (CAO), α-humulene (HUM), trans-nerolidol (NER) and valencene (VAL) are constituents of the essential oil of Myrica rubra (MEO), which has significant antiproliferative effect in various cancer cell lines. In the present study, we compared the antiproliferative effect of these sesquiterpenes alone and in combination with the cytostatic drug doxorubicin (DOX) in cancer cell lines with different sensitivity to DOX. Two ovarian cancer cell lines (sensitive A2780 and partly resistant SKOV3) and two lymphoblast cancer cell lines (sensitive CCRF/CEM and completely resistant CEM/ADR) were used...
June 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28630940/fluconazole-induced-ploidy-change-in-cryptococcus-neoformans-results-from-the-uncoupling-of-cell-growth-and-nuclear-division
#2
Sophie Altamirano, Diana Fang, Charles Simmons, Shreyas Sridhar, Peipei Wu, Kaustuv Sanyal, Lukasz Kozubowski
Cryptococcus neoformans is a pathogenic yeast that causes lethal cryptococcal meningitis in immunocompromised patients. One of the challenges in treating cryptococcosis is the development of resistance to azole antifungals. Previous studies linked azole resistance to elevated numbers of copies of critical resistance genes in aneuploid cells. However, how aneuploidy is formed in the presence of azole drugs remains unclear. This study showed that treatment with inhibitory concentrations of an azole drug, fluconazole (FLC), resulted in a significant population of cells with increased DNA content, through the following defects: inhibition of budding, premature mitosis, and inhibition of cytokinesis followed by replication in the mother cell...
May 2017: MSphere
https://www.readbyqxmd.com/read/28629126/differentiated-thyroid-cancer-treatment-state-of-the-art
#3
REVIEW
Benedikt Schmidbauer, Karin Menhart, Dirk Hellwig, Jirka Grosse
Differentiated thyroid cancer (DTC) is a rare malignant disease, although its incidence has increased over the last few decades. It derives from follicular thyroid cells. Generally speaking, the prognosis is excellent. If treatment according to the current guidelines is given, cases of recurrence or persistence are rare. DTC requires special expertise by the treating physician. In recent years, new therapeutic options for these patients have become available. For this article we performed a systematic literature review with special focus on the guidelines of the American Thyroid Association, the European Association of Nuclear Medicine, and the German Society of Nuclear Medicine...
June 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28622171/reactions-to-cytostatic-agents-in-children
#4
Josefina R Cernadas
PURPOSE OF REVIEW: The current review will focus on drug hypersensitivity reactions to chemotherapy specifically to those drugs most used in children. We know that potentially all chemotherapeutic agents can cause infusion reactions, generally defined as adverse drug reactions. Of these, some are Type A, defined as expected and described in the characteristics of the drug and others, and Type B, defined as unexpected reactions which cannot be explained by the known toxicity profile of the drug...
June 14, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28621943/natural-products-discovered-in-a-high-throughput-screen-identified-as-inhibitors-of-rgs17-and-as-cytostatic-and-cytotoxic-agents-for-lung-and-prostate-cancer-cell-lines
#5
Christopher R Bodle, Duncan I Mackie, Michael P Hayes, Josephine H Schamp, Michael R Miller, Michael D Henry, Jonathan A Doorn, Jon C D Houtman, Michael A James, David L Roman
Regulator of G Protein Signaling (RGS) 17 is an overexpressed promoter of cancer survival in lung and prostate tumors, the knockdown of which results in decreased tumor cell proliferation in vitro. Identification of drug-like molecules inhibiting this protein could ameliorate the RGS17's pro-tumorigenic effect. Using high-throughput screening, a chemical library containing natural products was interrogated for inhibition of the RGS17-Gαo interaction. Initial hits were verified in control and counter screens...
June 16, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28612615/-new-drugs-in-the-treatment-of-acute-myeloid-leukemia-in-the-elderly
#6
Z Šustková, M Čulen, L Semerád, I Ježíšková, D Dvořáková, Z Ráčil, J Mayer
BACKGROUND: At the time of diagnosis, most patients with acute myeloid leukemia are older than 65 years of age. Treatment of this group of patients is challenging because they become less tolerant to aggressive chemotherapy with increasing age. Less than one-third of elderly patients are considered eligible for intensive treatment; nevertheless, the survival analysis for this population remains poor. Due to numerous comorbidities and an overall deteriorating condition, most elderly patients with acute myeloid leukemia receive only palliative or best supportive care, which are associated with a high mortality rate...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28612296/kinesin-5-blocker-monastrol-protects-against-bortezomib-induced-peripheral-neurotoxicity
#7
Ilja Bobylev, Dominik Peters, Maulik Vyas, Mohammed Barham, Ines Klein, Elke Pogge von Strandmann, Wolfram F Neiss, Helmar C Lehmann
Neurotoxicity is a relevant side effect of bortezomib treatment. Previous reports have shown that the development of peripheral neuropathy caused by anti-neoplastic agents may be a result of reduced axonal transport. Based on evidence from prior studies that the kinesin-5 inhibitor monastrol enhances axonal transport and improves neuronal regeneration, we focused on the neuroprotective role of monastrol during the chemotherapeutic treatment with bortezomib. Prolonged treatment of C57BL/6 mice with bortezomib induced a length-dependent small-fiber neuropathy with axonal atrophy and loss of sensory nerve fibers...
June 13, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28611294/microarray-based-detection-and-expression-analysis-of-new-genes-associated-with-drug-resistance-in-ovarian-cancer-cell-lines
#8
Radosław Januchowski, Karolina Sterzyńska, Piotr Zawierucha, Marcin Ruciński, Monika Świerczewska, Małgorzata Partyka, Katarzyna Bednarek-Rajewska, Maciej Brązert, Michał Nowicki, Maciej Zabel, Andrzej Klejewski
PURPOSE: The present study is to discover a new genes associated with drug resistance development in ovarian cancer. METHODS: We used microarray analysis to determine alterations in the level of expression of genes in cisplatin- (CisPt), doxorubicin- (Dox), topotecan- (Top), and paclitaxel- (Pac) resistant variants of W1 and A2780 ovarian cancer cell lines. Immunohistochemistry assay was used to determine protein expression in ovarian cancer patients. RESULTS: We observed alterations in the expression of 22 genes that were common to all three cell lines that were resistant to the same cytostatic drug...
May 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28611109/an-in-vivo-functional-screen-identifies-jnk-signaling-as-a-modulator-of-chemotherapeutic-response-in-breast-cancer
#9
Matthew Ashenden, Antoinette van Weverwijk, Nirupa Murugaesu, Antony Fearns, James Campbell, Qiong Gao, Marjan Iravani, Clare M Isacke
Chemotherapy remains the mainstay of treatment for advanced breast cancer, however, resistance is an inevitable event for the majority of patients with metastatic disease. Moreover, there is little information available to guide stratification of first line chemotherapy, crucial given the common development of multidrug resistance. Here we describe an in vivo screen to interrogate the response to anthracycline-based chemotherapy in a syngeneic metastatic breast cancer model, and identify JNK signaling as a key modulator of chemotherapy response...
June 13, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28608355/-neuronal-glycolipids-regulate-glial-cell-division-negatively-during-development-and-following-a-lesion
#10
REVIEW
M Nieto-Sampedro, V C Muneton-Gomez
Glial cells in the central nervous system of adult mammals outnumber neurons 10-fold. Their number remains stationary throughout adulthood, controlled by the concomitant presence of mitogens and mitogen inhibitors. The most abundant inhibitor, neurostatin, is ganglioside GD1b O-acetylated on hydroxyl 9 of its outermost sialic acid. Neurostatin inhibited the proliferation of primary microglia and astroblasts in culture (cytostatic) as well as both rodent and human glioma cells (cytotoxic) at nanomolar concentrations...
June 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28599872/hepatotoxicity-following-systemic-therapy-for-colorectal-liver-metastases-and-the-impact-of-chemotherapy-associated-liver-injury-on-outcomes-after-curative-liver-resection
#11
REVIEW
G Duwe, S Knitter, S Pesthy, A S Beierle, M Bahra, M Schmelzle, R B Schmuck, P Lohneis, N Raschzok, R Öllinger, M Sinn, B Struecker, I M Sauer, J Pratschke, A Andreou
Patients with colorectal liver metastases (CLM) have remarkably benefited from the advances in medical multimodal treatment and surgical techniques over the last two decades leading to significant improvements in long-term survival. More patients are currently undergoing liver resection following neoadjuvant chemotherapy, which has been increasingly established within the framework of curative-indented treatment strategies. However, the use of several cytotoxic agents has been linked to specific liver injuries that not only impair the ability of liver tissue to regenerate but also decrease long-term survival...
May 18, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28596914/cytotoxic-effects-of-docetaxel-as-a-candidate-drug-of-drug-eluting-stent-on-human-umbilical-vein-endothelial-cells-and-the-signaling-pathway-of-cell-migration-inhibition-adhesion-delay-and-shape-change
#12
Tingzhang Hu, Chun Yang, Meiling Fu, Jiali Yang, Rolin Du, Xiaolin Ran, Tieying Yin, Guixue Wang
Docetaxel (DTX), a paclitaxel analogue, can efficiently inhibit proliferation of vascular smooth muscle cells and has broadly been used as an antiangiogenesis drug. However, as a candidate drug of drug-eluting stent, the effects of DTX on human umbilical vein endothelial cells (HUVECs) are still not well understood. Herein, we investigated the effects of DTX on proliferation, apoptosis, adhesion, migration and morphology of HUVECs in vitro. We found that DTX had the cytostatic and cytotoxic effects at low and high concentrations, respectively...
June 2017: Regenerative Biomaterials
https://www.readbyqxmd.com/read/28581297/the-first-enantioselective-total-synthesis-of-trans-dihydronarciclasine
#13
Gábor Varró, László Hegedűs, András Simon, Attila Balogh, Alajos Grün, Ibolya Leveles, Beáta G Vértessy, István Kádas
A feasible and enantioselective total synthesis of (-)-trans-dihydronarciclasine [(-)-1], a highly biologically active alkaloid, was devised starting from vanillin (8). The key step of this new synthesis was an asymmetric, organocatalytic Michael addition, in which an optically active nitropentanone [(-)-13] was obtained from a butenone derivative (12). Excellent enantioselectivity (>99% ee) was achieved using the (8S,9S)-9-amino(9-deoxy)epiquinine (16) organocatalyst. The target molecule can be prepared in 13 steps from compound (-)-13...
June 5, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28580868/cell-cycle-therapeutics-come-of-age
#14
Matthew Ingham, Gary K Schwartz
The ability to sustain unscheduled proliferation is a hallmark of cancer. The normal process of cell division occurs via the cell cycle, a series of highly regulated steps that are orchestrated at the molecular level by specific cyclins that act in association with cyclin-dependent kinases (CDKs). Cyclin D and CDK4/6 play a key role in cell-cycle progression by phosphorylating and inactivating the retinoblastoma protein, a tumor suppressor that restrains G1- to S-phase progression. The first-generation CDK inhibitors demonstrated broad activity upon several CDKs, which likely explains their considerable toxicities and limited efficacy...
June 3, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28574608/role-of-mitogen-activated-protein-kinase-and-maturation-promoting-factor-during-the-achievement-of-meiotic-competency-in-mammalian-oocytes
#15
Meenakshi Tiwari, Anumegha Gupta, Alka Sharma, Shilpa Prasad, Ashutosh N Pandey, Pramod K Yadav, Ajai K Pandey, Tulsidas G Shrivastav, Shail K Chaube
The oocyte quality remains as one of the major problems associated with poor in vitro fertilization (IVF) rate and assisted reproductive technology (ART) failure worldwide. The oocyte quality is dependent on its meiotic maturation that begins inside the follicular microenvironment and gets completed at the time of ovulation in most of the mammalian species. Follicular oocytes are arrested at diplotene stage of first meiotic prophase. The resumption of meiosis from diplotene arrest, progression through metaphase-I (M-I) and further arrest at metaphase-II (M-II) are important physiological requirements for the achievement of meiotic competency in mammalian oocytes...
June 2, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28559939/comparison-of-quantitative-methods-on-fdg-pet-ct-for-treatment-response-evaluation-of-metastatic-colorectal-cancer
#16
Ji-In Bang, Yoojoo Lim, Jin Chul Paeng, Sae-Won Han, Sohyun Park, Jung Min Lee, Hyun Joo Kim, Gi Jeong Cheon, Dong Soo Lee, June-Key Chung, Tae-You Kim, Keon Wook Kang
PURPOSE: FDG PET is effective in treatment response evaluation of cancer. However, there is no standard method for quantitative evaluation of FDG PET, particularly regarding cytostatic drugs. We compared various FDG PET quantitative methods in terms of response determination. METHODS: A total of 39 refractory metastatic colorectal cancer patients who received a multikinase inhibitor treatment were included. Baseline and posttreatment FDG PET/CT scans were performed before and two cycles after treatment...
June 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28553156/isoflavones-their-glycosides-and-glycoconjugates-synthesis-and-biological-activity
#17
REVIEW
Wiesław Szeja, Grzegorz Grynkiewicz, Aleksandra Rusin
Glycosylation of small biologically active molecules, either of natural or synthetic origin, has a profound impact on their solubility, stability, and bioactivity, making glycoconjugates attractive compounds as therapeutic agents or nutraceuticals. A large proportion of secondary metabolites, including flavonoids, occur in plants as glycosides, which adds to the molecular diversity that is much valued in medicinal chemistry studies. The subsequent growing market demand for glycosidic natural products has fueled the development of various chemical and biotechnological methods of glycosides preparation...
January 2017: Current Organic Chemistry
https://www.readbyqxmd.com/read/28550622/genomic-instability-related-to-zinc-deficiency-and-excess-in-an-in-vitro-model-is-the-upper-estimate-of-the-physiological-requirements-recommended-for-children-safe
#18
Gisel Padula, María Virginia Ponzinibbio, Rocío Celeste Gambaro, Analía Isabel Seoane
Micronutrients are important for the prevention of degenerative diseases due to their role in maintaining genomic stability. Therefore, there is international concern about the need to redefine the optimal mineral and vitamin requirements to prevent DNA damage. We analyzed the cytostatic, cytotoxic, and genotoxic effect of in vitro zinc supplementation to determine the effects of zinc deficiency and excess and whether the upper estimate of the physiological requirement recommended for children is safe. To achieve zinc deficiency, DMEM/Ham's F12 medium (HF12) was chelated (HF12Q)...
May 26, 2017: In Vitro Cellular & Developmental Biology. Animal
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
#19
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/28532049/co-delivery-of-cisplatin-and-doxorubicin-from-calcium-phosphate-beads-matrix-scaffolds-for-osteosarcoma-therapy
#20
Ulrike Hess, Shakiba Shahabi, Laura Treccani, Philipp Streckbein, Christian Heiss, Kurosch Rezwan
Bone substitute materials with a controlled drug release ability can fill cavities caused by the resection of bone tumours and thereby combat any leftover bone cancer cells. The combined release of different cytostatics seems to enhance their toxicity. In this study, calcium phosphate beads and matrix scaffolds are combined for a long-term co-delivery of cis-diamminedichloroplatinum (cisplatin, CDDP) and doxorubicin hydrochloride (DOX) as clinical relevant model drugs. Tricalcium phosphate/alginate beads as additional drug carrier are produced by droplet extrusion with ionotropic gelation and incorporated in scaffold matrix by freeze gelation without sintering...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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