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paclitaxel cancer

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https://www.readbyqxmd.com/read/28231544/ginsenoside-rg3-promotes-cytotoxicity-of-paclitaxel-through-inhibiting-nf-%C3%AE%C2%BAb-signaling-and-regulating-bax-bcl-2-expression-on-triple-negative-breast-cancer
#1
Zuguo Yuan, Hao Jiang, Xinhai Zhu, Xinge Liu, Jinhui Li
Taxane-based chemotherapy regimen is the most effective therapeutic strategy for triple-negative breast cancer (TNBC) which is an aggressive subtype of breast cancer with high rate of recurrence and distant metastasis. Ginsenoside Rg3 is isolated from Panax ginseng with anti-cancer activity against carcinomas. We aim to evaluate the chemosensitizing effects of Ginsenoside Rg3 on TNBC cells and xenograft and explore the underlying mechanism. Human triple-negative breast cancer lines MDA-MB-231, MDA-MB-453 and BT-549 were used...
February 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28231414/mir-135a-3p-as-a-promising-biomarker-and-nucleic-acid-therapeutic-agent-for-ovarian-cancer
#2
Satoshi Fukagawa, Kohei Miyata, Fusanori Yotsumoto, Chihiro Kiyoshima, Sung Ouk Nam, Haruchika Anan, Takahiro Katsuda, Daisuke Miyahara, Masaharu Murata, Hiroshi Yagi, Kyoko Shirota, Shin'ichiro Yasunaga, Kiyoko Kato, Shingo Miyamoto
Ovarian cancer is the most lethal gynecologic malignancy. Recently, several molecularly targeted anticancer agents have been developed for ovarian cancer; however, its prognosis has remained extremely poor. The development of molecularly targeted therapy, as well as companion diagnostics, is required to improve outcomes for patients with ovarian cancer. In this study, to identify microRNAs involved in the progression of ovarian cancer we analyzed serum microRNAs in patients with ovarian cancer using microRNA array and qRT-PCR and examined the anticancer properties of microRNA expression in ovarian cancer cells...
February 23, 2017: Cancer Science
https://www.readbyqxmd.com/read/28230972/paclitaxel-biosynthesis-adenylation-and-thiolation-domains-of-an-nrps-tyca-pheat-module-produce-various-arylisoserine-coa-thioesters
#3
Ruth Muchiri, Kevin D Walker
Structure-activity relationship studies show that the phenylisoserinyl moiety of paclitaxel is largely necessary for the effective anticancer activity. Several paclitaxel analogs with a variant isoserinyl sides chain have improved pharmaceutical properties over the parent drug. To produce the isoserinyl CoAs as intermediates needed for enzyme catalysis on a semibiosynthetic pathway to paclitaxel analogs, we repurposed the adenylation and thiolation domains of a non-ribosomal peptide synthetase (Phe-AT) to function as a CoA ligase...
February 23, 2017: Biochemistry
https://www.readbyqxmd.com/read/28225784/a-novel-intraperitoneal-metastatic-xenograft-mouse-model-for-survival-outcome-assessment-of-esophageal-adenocarcinoma
#4
Md Sazzad Hassan, Niranjan Awasthi, Jun Li, Margaret A Schwarz, Roderich E Schwarz, Urs von Holzen
Esophageal adenocarcinoma (EAC) has become the dominant type of esophageal cancer in United States. The 5-year survival rate of EAC is below 20% and most patients present with locally advanced or widespread metastatic disease, where current treatment is largely ineffective. Therefore, new therapeutic approaches are urgently needed. Improvement of EAC patient outcome requires well-characterized animal models in which to evaluate novel therapeutics. In this study we aimed to establish a peritoneal dissemination xenograft mouse model of EAC that would support survival outcome analyses...
2017: PloS One
https://www.readbyqxmd.com/read/28224894/development-of-drug-delivery-systems-for-taxanes-using-ionic-gelation-of-carboxyacyl-derivatives-of-chitosan
#5
Yury A Skorik, Anton A Golyshev, Andreii S Kritchenkov, Ekaterina R Gasilova, Daria N Poshina, Amal J Sivaram, Rangasamy Jayakumar
Nanoparticles of two chitosan derivatives - N-succinyl-chitosan (SC) and N-glutaryl-chitosan (GC) - were developed as passive transport systems for taxanes (paclitaxel and docetaxel) using an ionic gelation technique with sodium tripolyphosphate. These nanoparticles had an apparent hydrodynamic diameter of 300-350nm, a ζ-potential of 25-31mV, an encapsulation efficiency of 21-26%, and a drug loading efficiency of 6-13%. DLS and SLS analysis shows that the nanoparticles have a unimodal size distribution and spherical form...
April 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28224562/solitary-choroidal-metastasis-from-gastric-adenocarcinoma-a-case-report
#6
Masanari Shimada, Susumu Amaya, Hiroaki Sugita, Yuichiro Furutani, Yoshinori Munemoto, Takeshi Mitsui, Toshiro Tanahashi, Yuzo Kikuchi
BACKGROUND: Metastatic choroidal carcinomas that originated from the gastrointestinal tract are extremely rare. We report a case of suspected solitary choroidal metastasis from gastric adenocarcinoma. CASE PRESENTATION: The patient was a 60-year-old man who had undergone laparoscopic distal gastrectomy with D1+ lymphadenecetomy for gastric cancer. The clinical stage was T1bN0M0 (TNM classification), but the pathological stage was T4aN0M0 beyond expectation. Adjuvant chemotherapy with oral Tegafur, Gimeracil, Oteracil potassium (TS-1(®)) was initiated...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28223821/asparaginyl-endopeptidase-improves-the-resistance-of-microtubule-targeting-drugs-in-gastric-cancer-through-iqgap1-modulating-the-egfr-jnk-erk-signaling-pathway
#7
Yuehong Cui, Qian Li, Hong Li, Yan Wang, Hongshan Wang, Weidong Chen, Shangmin Zhang, Jian Cao, Tianshu Liu
PURPOSE: In recent years, understanding of the role of asparaginyl endopeptidase (AEP) in tumorigenesis has steadily increased. In this study, we investigated whether AEP expression correlates with sensitivity to chemotherapeutic drugs in gastric cancer and explored the mechanism. PATIENTS AND METHODS: AEP expression in the serum of patients' peripheral blood was measured by enzyme-linked immunosorbent assay. Patient survival time was evaluated using univariate and multivariate analyses...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28223678/-conversion-surgery-for-initially-unresectable-locally-advanced-pancreatic-cancer-following-gemcitabine-plus-nab-paclitaxel-a-case-report
#8
Shuji Nakamoto, Ryo Nishiyama, Takayoshi Kaneda, Mitsuo Yokota, Hiroshi Kawamata, Hiroshi Tajima, Takashi Kaizu, Yusuke Kumamoto, Hiroshi Yamauchi, Kosuke Okuwaki, Tomohisa Iwai, Hiroshi Imaizumi, Erina Suzuki, Atsuko Hara, Masaaki Ichinoe, Mitsuhiro Kida, Masahiko Watanabe
We report a case of unresectable locally advanced pancreatic cancer successfully resected after gemcitabine(GEM)plus nab-paclitaxel(PTX)treatment. A 68-year-old man was referred to our institution with jaundice. We diagnosed pancreatic head cancer using computed tomography(CT)and endoscopic retrograde cholangiopancreatography. We initially diagnosed it as locally advanced unresectable pancreatic cancer because of extensive invasion to the portal vein. GEM plus nab- PTX was administered to the patient as systemic chemotherapy...
February 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28222395/technetium-99m-radiolabeled-paclitaxel-as-an-imaging-probe-for-breast-cancer-in-vivo
#9
Liziane O F Monteiro, Renata S Fernandes, Luciano C Castro, Valbert N Cardoso, Mônica C Oliveira, Danyelle M Townsend, Alice Ferretti, Domenico Rubello, Elaine A Leite, André L B de Barros
The high incidence and mortality of breast cancer supports efforts to develop innovative imaging probes to effectively diagnose, evaluate the extent of the tumor, and predict the efficacy of tumor treatments while concurrently and selectively delivering anticancer agents to the cancer tissue. In the present study we described the preparation of technetium-99m ((99m)Tc)-labeled paclitaxel (PTX) and evaluated its feasibility as a radiotracer for breast tumors (4T1) in BALB/c mice. Thin Layer Chromatography (TLC) was used to determine the radiochemical purity and in vitro stability of (99m)Tc-PTX...
February 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28222073/a-phase-i-study-of-intravenous-and-oral-rucaparib-in-combination-with-chemotherapy-in-patients-with-advanced-solid-tumours
#10
Richard H Wilson, Tr Jeffry Evans, Mark R Middleton, L Rhoda Molife, James Spicer, Veronique Dieras, Patricia Roxburgh, Heidi Giordano, Sarah Jaw-Tsai, Sandra Goble, Ruth Plummer
BACKGROUND: This study evaluated safety, pharmacokinetics, and clinical activity of intravenous and oral rucaparib, a poly(ADP-ribose) polymerase inhibitor, combined with chemotherapy in patients with advanced solid tumours. METHODS: Initially, patients received escalating doses of intravenous rucaparib combined with carboplatin, carboplatin/paclitaxel, cisplatin/pemetrexed, or epirubicin/cyclophosphamide. Subsequently, the study was amended to focus on oral rucaparib (once daily, days 1-14) combined with carboplatin (day 1) in 21-day cycles...
February 21, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28220831/the-distribution-of-the-apparent-diffusion-coefficient-as-an-indicator-of-the-response-to-chemotherapeutics-in-ovarian-tumour-xenografts
#11
Monique C Tourell, Ali Shokoohmand, Marietta Landgraf, Nina P Holzapfel, Patrina S P Poh, Daniela Loessner, Konstantin I Momot
Diffusion-weighted magnetic resonance imaging (DW-MRI) was used to evaluate the effects of single-agent and combination treatment regimens in a spheroid-based animal model of ovarian cancer. Ovarian tumour xenografts grown in non-obese diabetic/severe-combined-immunodeficiency (NOD/SCID) mice were treated with carboplatin or paclitaxel, or combination carboplatin/paclitaxel chemotherapy regimens. After 4 weeks of treatment, tumours were extracted and underwent DW-MRI, mechanical testing, immunohistochemical and gene expression analyses...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220199/-novel-pharmaceutical-treatment-approaches-for-gastric-cancer
#12
F Lordick
This review article delineates novel approaches for the pharmaceutical treatment of gastric cancer. A newly developed molecular classification of gastric cancer based on histology, genetic, epigenetic and proteomic characteristics has evolved. It provides a road map for development of new drugs and combinations as well as for patient stratification in clinical research and it is expected to be introduced into clinical practice in the near future. Anti-HER2 targeted treatment is a validated strategy for treatment of metastatic gastric cancer and is now also being studied in the perioperative setting to increase response rates and ultimately survival in patients undergoing curative surgery; however, the resistance mechanisms of HER2-targeted treatment are poorly understood and optimal patient selection remains challenging...
February 20, 2017: Der Pathologe
https://www.readbyqxmd.com/read/28217906/production-of-taxadiene-by-engineering-of-mevalonate-pathway-in-escherichia-coli-and-endophytic-fungus-alternaria-alternata-tpf6
#13
Guangkai Bian, Yujie Yuan, Hui Tao, Xiaofei Shi, Xiaofang Zhong, Yichao Han, Shuai Fu, Chengxiang Fang, Zixin Deng, Tiangang Liu
Taxol (paclitaxel) is a diterpenoid compound with significant and extensive applications in the treatment of cancer. The production of Taxol and relevant intermediates by engineered microbes is an attractive alternative to the semichemical synthesis of Taxol. In this study, based on a previously developed platform, we first established taxadiene production in mutant E. coli T2 and T4 by engineering of the mevalonate (MVA) pathway. We then developed an Agrobacterium tumefaciens-mediated transformation (ATMT) method and verified the strength of heterologous promoters in Alternaria alternata TPF6...
February 20, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28217682/syndrome-of-inappropriate-antidiuretic-hormone-secretion-following-irinotecan-cisplatin-administration-as-a-treatment-for-recurrent-ovarian-clear-cell-carcinoma
#14
Do Youn Kwon, Gwan Hee Han, Roshani Ulak, Kyung Do Ki, Jong Min Lee, Seon Kyung Lee
Syndrome of inappropriate antidiuretic hormone secretion (SIADH) has various causes including central nervous system disorders, pulmonary and endocrine diseases, paraneoplastic syndromes, and use of certain drugs. SIADH induced by chemotherapy with irinotecan-cisplatin is not a common complication. Here, we review a case of SIADH after treatment with irinotecan-cisplatin. A 45-year-old woman received adjuvant chemotherapy (paclitaxel-carboplatin) for ovarian clear cell carcinoma, but the cancer recurred within 9 months of chemotherapy...
January 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28214016/melk-expression-in-ovarian-cancer-correlates-with-poor-outcome-and-its-inhibition-by-otssp167-abrogates-proliferation-and-viability-of-ovarian-cancer-cells
#15
Reto S Kohler, Henriette Kettelhack, Alexandra M Knipprath-Mészaros, André Fedier, Andreas Schoetzau, Francis Jacob, Viola Heinzelmann-Schwarz
OBJECTIVE: Maternal embryonic leucine-zipper kinase (MELK) shows oncogenic properties in basal-like breast cancer, a cancer subtype sharing common molecular features with high-grade serous ovarian cancer. We examined the potential of MELK as a molecular and pharmacological target for treatment of epithelial ovarian cancer (EOC). METHODS/MATERIALS: Bioinformatic analysis was performed on nine OC transcriptomic data sets totaling 1241 patients. Effects of MELK depletion by shRNA or inhibition by OTSSP167 in cell lines were assessed by colony formation and MTT (proliferation) assays, Western blotting (apoptosis), and flow cytometry (cell cycle analysis)...
February 14, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28213783/high-pten-gene-expression-is-a-negative-prognostic-marker-in-human-primary-breast-cancers-with-preserved-p53-function
#16
Synnøve Yndestad, Eilin Austreid, Stian Knappskog, Ranjan Chrisanthar, Peer Kåre Lilleng, Per Eystein Lønning, Hans Petter Eikesdal
PURPOSE: PTEN is an important tumor suppressor in breast cancer. Here, we examined the prognostic and predictive value of PTEN and PTEN pseudogene (PTENP1) gene expression in patients with locally advanced breast cancer given neoadjuvant chemotherapy. METHODS: The association between pretreatment PTEN and PTENP1 gene expression, response to neoadjuvant chemotherapy, and recurrence-free and disease-specific survival was assessed in 364 patients with locally advanced breast cancer given doxorubicin, 5-fluorouracil/mitomycin, or epirubicin versus paclitaxel in three phase II prospective studies...
February 17, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28212993/efficacy-according-to-blind-independent-central-review-post-hoc-analyses-from-the-phase-iii-randomized-multicenter-ipass-study-of-first-line-gefitinib-versus-carboplatin-paclitaxel-in-asian-patients-with-egfr-mutation-positive-advanced-nsclc
#17
Yi-Long Wu, Nagahiro Saijo, Sumitra Thongprasert, J C-H Yang, Baohui Han, Benjamin Margono, Busayamas Chewaskulyong, Patrapim Sunpaweravong, Yuichiro Ohe, Yukito Ichinose, Jin-Ji Yang, Tony S K Mok, Helen Young, Vincent Haddad, Yuri Rukazenkov, Masahiro Fukuoka
OBJECTIVE: The Phase III, randomized, open-label IPASS study (NCT00322452) of first-line epidermal growth factor receptor tyrosine kinase inhibitor (EGFR TKI) gefitinib versus carboplatin/paclitaxel for Asian patients with advanced non-small-cell lung cancer (NSCLC) showed that investigator-assessed progression-free survival (PFS) and objective response rate (ORR) were significantly prolonged in patients with EGFR mutation-positive NSCLC who received gefitinib versus patients with EGFR mutation-negative NSCLC...
February 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28212584/hyaluronic-acid-serum-albumin-conjugate-based-nanoparticles-for-targeted-cancer-therapy
#18
Ravit Edelman, Yehuda G Assaraf, Inna Levitzky, Tal Shahar, Yoav D Livney
Multiple carcinomas including breast, ovarian, colon, lung and stomach cancer, overexpress the hyaluronic acid (HA) receptor, CD44. Overexpression of CD44 contributes to key cancer processes including tumor invasion, metastasis, recurrence, and chemoresistance. Herein, we devised novel targeted nanoparticles (NPs) for delivery of anticancer chemotherapeutics, comprised of self-assembling Maillard reaction-based conjugates of HA and bovine serum albumin (BSA). HA served as the hydrophilic block, and as the ligand for actively targeting cancer cells overexpressing CD44...
February 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28212576/galectin-1-knockdown-improves-drug-sensitivity-of-breast-cancer-by-reducing-p-glycoprotein-expression-through-inhibiting-the-raf-1-ap-1-signaling-pathway
#19
Fang Wang, Pengwei Lv, Yuanting Gu, Lin Li, Xin Ge, Guangcheng Guo
Galectin-1 (Gal-1), a member of the galectin family of carbohydrate binding proteins, plays a pivotal role in various cellular processes of tumorigenesis. The regulatory effect of Gal-1 on multidrug resistance (MDR) breast cancer cells is still unclear. qRT-PCR and western blot showed that Gal-1 and MDR gene 1 (MDR1) were both highly expressed in breast tumor tissues and cell lines. MTT assay and flow cytometry revealed that Gal-1 knockdown improved sensitivity to paclitaxel (PTX) and adriamycin (ADR) in MCF-7/PTX and MCF-7/ADR cells via inhibition of cell viability and promotion of cell apoptosis, while MDR1 overexpression weakened the sensitivity to PTX and ADR induced by Gal-1 knockdown...
February 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28212536/targeting-the-stress-oncoprotein-ledgf-p75-to-sensitize-chemoresistant-prostate-cancer-cells-to-taxanes
#20
Leslimar Ríos-Colón, Christina K Cajigas-Du Ross, Anamika Basu, Catherine Elix, Ivana Alicea-Polanco, Tino W Sanchez, Vinodh Radhakrishnan, Chien-Shing Chen, Carlos A Casiano
Prostate cancer (PCa) is associated with chronic prostate inflammation resulting in activation of stress and pro-survival pathways that contribute to disease progression and chemoresistance. The stress oncoprotein lens epithelium-derived growth factor p75 (LEDGF/p75), also known as DFS70 autoantigen, promotes cellular survival against environmental stressors, including oxidative stress, radiation, and cytotoxic drugs. Furthermore, LEDGF/p75 overexpression in PCa and other cancers has been associated with features of tumor aggressiveness, including resistance to cell death and chemotherapy...
February 14, 2017: Oncotarget
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