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https://www.readbyqxmd.com/read/29435178/inhibition-of-the-mek-erk-pathway-augments-nab-paclitaxel-based-chemotherapy-effects-in-preclinical-models-of-pancreatic-cancer
#1
Niranjan Awasthi, Sheena Monahan, Alexis Stefaniak, Margaret A Schwarz, Roderich E Schwarz
Nab-paclitaxel (NPT) combination with gemcitabine (Gem) represents the standard chemotherapy for pancreatic ductal adenocarcinoma (PDAC). Genetic alterations of the RAS/RAF/MEK/ERK (MAPK) signaling pathway yielding constitutive activation of the ERK cascade have been implicated as drivers of PDAC. Inhibition of downstream targets in the RAS-MAPK cascade such as MEK remains a promising therapeutic strategy. The efficacy of trametinib (Tra), a small molecule inhibitor of MEK1/2 kinase activity, in combination with nab-paclitaxel-based chemotherapy was evaluated in preclinical models of PDAC...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29421571/synthesis-of-novel-chlorin-e6-curcumin-conjugates-as-photosensitizers-for-photodynamic-therapy-against-pancreatic-carcinoma
#2
Shivakumar S Jalde, Anil Kumar Chauhan, Ji Hoon Lee, Pankaj Kumar Chaturvedi, Joon-Suk Park, Yong-Wan Kim
Curcumin (cur) has been comprehensively studied for its various biological properties, more precisely for its antitumor potential and it has shown the promising results as well. On the other hand, Chlorin e6 (Ce6) has mostly been used as a photosensitizer in photodynamic therapy (PDT) against a variety of carcinomas. In the present study, we have synthesized a series of Chlorin e6-curcumin (Ce6-cur) conjugates and investigated their photosensitizing potential against pancreatic cancer cell lines. All the synthesized compounds were characterized by UV, 1H NMR, 13C NMR and LC-MS...
February 2, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29416122/new-phenolic-bisabolane-sesquiterpenoid-derivatives-with-cytotoxicity-from-aspergillus-tennesseensis
#3
Li Liu, Ruixing Liu, Buddha Bahadur Basnet, Li Bao, Junjie Han, Long Wang, Hongwei Liu
Three new bisabolane sesquiterpenoid esters, aspertenols A-B (1-3), and six known compounds (4-9) were isolated from the fungus Aspergillus tennesseensis. The structures of new compounds were elucidated by extensive spectroscopic analysis. The cytotoxicities of 1-9 against A549, K562, and ASPC cell lines were tested by using the CCK8 method. Compounds 1, 3, 4, 6, 7, and 9 showed inhibition on K562 cell line with IC50 values in the range from 16.6 to 72.7 μM. Compounds 1, 4, and 9 showed moderate inhibitory activity against A549 with IC50 of 43...
February 7, 2018: Journal of Antibiotics
https://www.readbyqxmd.com/read/29386088/phosphoglycerate-mutase-1-pgam1-promotes-pancreatic-ductal-adenocarcinoma-pdac-metastasis-by-acting-as-a-novel-downstream-target-of-pi3k-akt-mtor-pathway
#4
Xinlu Liu, Xiaodong Tan, Peng Liu, Yunhao Wu, Songying Qian, Xiaobo Zhang
Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive tumors known, with an overall 5-year survival rate of less than 6% due to early local invasion and distant metastasis. Exploring suitable therapeutic targets associated with invasion and metastasis is required for improving the prognosis of PDAC. In this study, we investigated the role of the glycolytic enzyme phosphoglycerate mutase 1 (PGAM1) in PDAC. PGAM1 expression was examined in tissue samples of 54 PDAC patients using immunohistochemistry, and the correlation between clinicopathological expression and PGAM1 expression was determined...
January 31, 2018: Oncology Research
https://www.readbyqxmd.com/read/29380233/p38-differentially-regulates-erk-p21-and-mitogenic-signalling-in-two-pancreatic-carcinoma-cell-lines
#5
Monica Aasrum, G Hege Thoresen, Thoralf Christoffersen, Ingvild J Brusevold
Whereas the p38 MAP kinase has largely been associated with anti-proliferative functions, several observations have indicated that it may also have positive effects on proliferation. In hepatocytes, we have found that p38 has opposing effects on DNA synthesis when activated by EGF and HGF. Here we have studied the function of p38 in EGF- and HGF-induced DNA synthesis in the two pancreatic carcinoma cell lines AsPC-1 and Panc-1. In Panc-1 cells, the MEK inhibitor PD98059 reduced EGF- and HGF-induced DNA synthesis, while the p38 inhibitor SB203580 strongly increased the basal DNA synthesis and reduced expression of the cyclin-dependent kinase inhibitor (CDKI) p21...
January 29, 2018: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29374569/diketopiperazines-and-2h-pyran-2-ones-with-antioxidant-activity-from-the-rice-fermented-with-aspergillus-luchuensis
#6
Shanshan Sun, Ke Ma, Qiaoqiao Tao, Junjie Han, Li Bao, Li Liu, Hongwei Liu
Aspergillus luchuensis is widely used as a starter of saccharification in the koji industry, but no secondary metabolites have been reported from this fungus. Herein, we report the isolation and identification of four new diketopiperazine derivatives (1-4), one new methyl 4-(3-acetyl-2, 6-dihydroxyphenyl)-2-methoxybutanoate (5), and six known compounds (6-11) from the rice koji of A. luchuensis. The structures of 1-5 were determined by extensive spectral analysis including 1D and 2D NMR, HRESIMS, and CD, and ECD calculation...
January 25, 2018: Fitoterapia
https://www.readbyqxmd.com/read/29358632/ccr5-ccl5-axis-interaction-promotes-migratory-and-invasiveness-of-pancreatic-cancer-cells
#7
Santosh Kumar Singh, Manoj K Mishra, Isam-Eldin A Eltoum, Sejong Bae, James W Lillard, Rajesh Singh
Pancreatic cancer (PC) is one of the deadliest cancers and remains a major challenge due to its invasive and metastatic nature. Increased levels of CCR5 and CCL5 have established indicators for disease status in various cancers, including PC. However, their role in invasion and metastasis of PC is not known. Here we conducted immunohistochemistry of PC tissues and found elevated epithelial staining for CCR5 and CCL5 in metastatic PC tissues compared to non-neoplastic. In vitro experiments, such as flow cytometry, immunofluorescence and western blotting with human PC cell lines (AsPc-1, BxPc-3 and MIA PaCa-2), showed higher expression levels of CCR5...
January 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29344285/long-noncoding-rna-h19-derived-mir-675-regulates-cell-proliferation-by-down-regulating-e2f-1-in-human-pancreatic-ductal-adenocarcinoma
#8
Ling Ma, Xiaodong Tian, Huahu Guo, Zhengkui Zhang, Chong Du, Feng Wang, Xuehai Xie, Hongqiao Gao, Yan Zhuang, Marko Kornmann, Hong Gao, Yinmo Yang
The long noncoding RNA (lncRNA) H19 has been proven to be overexpressed in human pancreatic ductal adenocarcinoma (PDAC). H19-induced PDAC cell proliferation is cell cycle-dependent by modulating E2F-1. However, the mechanism of how H19 regulates E2F-1 remains unclear. In this study, we investigated the expression of miR-675 in PDAC tumours and cells, the biological function of miR-675 in PDAC cell proliferation and the possible relationship among H19, miR-675 and E2F-1. As a transcript of the first exon of H19, the level of miR-675 was negatively correlated with H19 expression in microdissected PDAC tissues (r=-0...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29333119/phytotherapeutics-oridonin-and-ponicidin-show-additive-effects-combined-with-irradiation-in-pancreatic-cancer-in-vitro
#9
Jakob Liermann, Patrick Naumann, Franco Fortunato, Thomas E Schmid, Klaus-Josef Weber, Jürgen Debus, Stephanie E Combs
Background: Chemoradiation of locally advanced non-metastatic pancreatic cancer can lead to secondary operability by tumor mass reduction. Here, we analyzed radiomodulating effects of oridonin and ponicidin in pancreatic cancer in vitro. Both agents are ent-kaurane diterpenoids, extracted from Isodon rubescens, a plant that is well known in Traditional Chinese Medicine. Cytotoxic effects have recently been shown in different tumor entities for both agents. Materials and methods: Pancreatic cancer cell lines AsPC-1, BxPC-3, Panc-1 and MIA PaCa-2 were pretreated with oridonin or ponicidin and irradiated with 2 Gy to 6 Gy...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29286387/establishment-of-an-extracellular-acidic-ph-culture-system
#10
Ayano Kondo, Tsuyoshi Osawa
Conditions of the tumor microenvironment, such as hypoxia or nutrient starvation, play critical roles in cancer progression and malignancy. However, the role of acidic extracellular pH in tumor aggressiveness and its underlying mechanism has not been extensively studied compared to hypoxic or nutrient starvation conditions. In addition, a well-defined culture method to mimic the acidic extracellular tumor microenvironment has not been fully reported. Here we present a simple in vitro culture method to maintain acidic extracellular pH using reduced bicarbonate and increased lactate or HCl concentrations in the culture medium...
November 19, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29286105/tsoong-induces-apoptosis-and-inhibits-proliferation-migration-and-invasion-of-pancreatic-ductal-adenocarcinoma-cells
#11
Yun-Peng Luan, Qi-Feng Li, Shi-Guo Wu, De-Chang Mao, Yan-Yun Deng, Rong-Wang Chen
The roots of Codonopsis cordifolioidea (classified as campanulaceae cordifolioidea), locally known as Tsoong, have been used as a tonic food. The major components isolated from Tsoong have been demonstrated to present anti‑human immunodeficiency virus‑1 activities and cytotoxicity against various tumor cell lines. However, the possible effects of the novel compound isolated from Tsoong, cordifoliketones A, on pancreatic ductal adenocarcinoma (PDAC) cells, are still unknown. In the present study, cordifoliketones A extractions were prepared from Tsoong, and the possible effects on PDAC cell growth, apoptosis, migration and invasion in vitro and in vivo were exlored...
December 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29277891/fluorescence-and-multispectral-optoacoustic-imaging-for-an-optimised-detection-of-deeply-located-tumours-in-an-orthotopic-mouse-model-of-pancreatic-carcinoma
#12
Joanna Napp, Marieke A Stammes, Jing Claussen, Hendrica A J M Prevoo, Cornelis F M Sier, Freek J M Hoeben, Marc S Robillard, Alexander L Vahrmeijer, Tim Devling, Alan B Chan, Lioe-Fee de Geus-Oei, Frauke Alves
A crucial point for the management of pancreatic ductal adenocarcinoma (PDAC) is the decrease of R1 resections. Our aim was to evaluate the combination of multispectral optoacoustic tomography (MSOT) with fluorescence guided surgery (FGS) for diagnosis and perioperative detection of tumour nodules and resection margins in a xenotransplant mouse model of human pancreatic cancer. The peptide cRGD, conjugated with the near infrared fluorescent (NIRF) dye IRDye800CW and with a trans-cyclooctene (TCO) tag for future click chemistry (cRGD-800CW-TCO), was applied to PDAC bearing immunodeficient nude mice...
December 26, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29246888/impact-of-breast-cancer-resistance-protein-expression-on-the-in-vitro-efficacy-of-anticancer-drugs-in-pancreatic-cancer-cell-lines
#13
Ikumi Washio, Takeo Nakanishi, Naoki Ishiguro, Norio Yamamura, Ikumi Tamai
Breast cancer resistance protein (BCRP) overexpression confers multidrug resistance to cancer cells, and the efficacy of anticancer drugs has been reported to be significantly affected by BCRP in cell lines transfected with BCRP or selected with drugs. It is unclear whether the in vitro efficacy of anticancer drugs is affected by endogenous BCRP, although cancer cell line panels consisting of defined tumor cell lines with endogenous BCRP have been used to screen for anticancer drugs in the pharmaceutical industry...
December 15, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/29221165/angiogenesis-in-adenosquamous-cancer-of-pancreas
#14
Nicola Silvestris, Katia Danza, Vito Longo, Oronzo Brunetti, Livia Fucci, Antonella Argentiero, Angela Calabrese, Ivana Cataldo, Roberto Tamma, Domenico Ribatti, Stefania Tommasi
Adenosquamous carcinoma of the pancreas (ASCP) is an uncommon variant of exocrine pancreatic malignancies, characterized by a histological admixture of adenomatous and squamous cell elements. This cancer is characterized by a poorly differentiated histology and a poorer clinical outcome compared to pancreatic ductal adenocarcinoma (PDAC). Unlike PDAC, that is characterized by a low microvascular density (MVD) and collapsed vasculature, no data are available about angiogenesis in ASPC. Immunohistochemical evaluation of MVD and trypatse-positive mast cells (MCs) were performed on a single case of ASCP compared to PDAC...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29215734/study-on-mechanism-about-long-noncoding-rna-malat1-affecting-pancreatic-cancer-by-regulating-hippo-yap-signaling
#15
Yongping Zhou, Ting Shan, Wenzhou Ding, Zhiyuan Hua, Yijun Shen, Zhihua Lu, Bo Chen, Tu Dai
OBJECTIVE: By investigating the migration and invasion ability in pancreatic cancer, this study probed into the lncRNA MALAT1 molecular mechanism on Hippo-YAP signaling. METHODS: The expression of lncRNA MALAT1 in PC tissues and cells was detected by qRT-PCR and western blot. The effect of si-MALAT1 on proliferation was determined by CCK-8 assay. Cell apoptosis, migration and invasion were respectively detected by flow cytometry assay, wound healing assay and transwell assay...
December 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29146535/2017-acc-aha-aapa-abc-acpm-ags-apha-ash-aspc-nma-pcna-guideline-for-the-prevention-detection-evaluation-and-management-of-high-blood-pressure-in-adults-a-report-of-the-american-college-of-cardiology-american-heart-association-task-force-on-clinical-practice
#16
Paul K Whelton, Robert M Carey, Wilbert S Aronow, Donald E Casey, Karen J Collins, Cheryl Dennison Himmelfarb, Sondra M DePalma, Samuel Gidding, Kenneth A Jamerson, Daniel W Jones, Eric J MacLaughlin, Paul Muntner, Bruce Ovbiagele, Sidney C Smith, Crystal C Spencer, Randall S Stafford, Sandra J Taler, Randal J Thomas, Kim A Williams, Jeff D Williamson, Jackson T Wright
No abstract text is available yet for this article.
November 7, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29146534/systematic-review-for-the-2017-acc-aha-aapa-abc-acpm-ags-apha-ash-aspc-nma-pcna-guideline-for-the-prevention-detection-evaluation-and-management-of-high-blood-pressure-in-adults-a-report-of-the-american-college-of-cardiology-american-heart-association-task
#17
David M Reboussin, Norrina B Allen, Michael E Griswold, Eliseo Guallar, Yuling Hong, Daniel T Lackland, Edgar Pete R Miller, Tamar Polonsky, Angela M Thompson-Paul, Suma Vupputuri
OBJECTIVE: To review the literature systematically and perform meta-analyses to address these questions: 1) Is there evidence that self-measured blood pressure (BP) without other augmentation is superior to office-based measurement of BP for achieving better BP control or for preventing adverse clinical outcomes that are related to elevated BP? 2) What is the optimal target for BP lowering during antihypertensive therapy in adults? 3) In adults with hypertension, how do various antihypertensive drug classes differ in their benefits and harms compared with each other as first-line therapy? METHODS: Electronic literature searches were performed by Doctor Evidence, a global medical evidence software and services company, across PubMed and EMBASE from 1966 to 2015 using key words and relevant subject headings for randomized controlled trials that met eligibility criteria defined for each question...
November 7, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29146533/2017-acc-aha-aapa-abc-acpm-ags-apha-ash-aspc-nma-pcna-guideline-for-the-prevention-detection-evaluation-and-management-of-high-blood-pressure-in-adults-executive-summary-a-report-of-the-american-college-of-cardiology-american-heart-association-task-force-on
#18
Paul K Whelton, Robert M Carey, Wilbert S Aronow, Donald E Casey, Karen J Collins, Cheryl Dennison Himmelfarb, Sondra M DePalma, Samuel Gidding, Kenneth A Jamerson, Daniel W Jones, Eric J MacLaughlin, Paul Muntner, Bruce Ovbiagele, Sidney C Smith, Crystal C Spencer, Randall S Stafford, Sandra J Taler, Randal J Thomas, Kim A Williams, Jeff D Williamson, Jackson T Wright
No abstract text is available yet for this article.
November 7, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29141872/mir-23a-acts-as-an-oncogene-in-pancreatic-carcinoma-by-targeting-foxp2
#19
Hongliang Diao, Zhou Ye, Renyi Qin
MicroRNAs have been reported to play an important role in tumor development and progression by targeting oncogenes and tumor suppressors. miR-23a has been described as significantly upregulated in multiple cancers and involved in tumorigenesis. The aim of this study was to evaluate the potential roles of miR-23a in pancreatic ductal adenocarcinoma (PDAC). We found that miR-23a level was significantly increased in tissues of PDAC compared with that in the control by real-time PCR. FOXP2 expression was downregulated and inversely correlated with miR-23a...
November 14, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29139022/effect-of-plasma-activated-lactated-ringer-s-solution-on-pancreatic-cancer-cells-in-vitro-and-in-vivo
#20
Yusuke Sato, Suguru Yamada, Shigeomi Takeda, Norifumi Hattori, Kae Nakamura, Hiromasa Tanaka, Masaaki Mizuno, Masaru Hori, Yasuhiro Kodera
BACKGROUND: The medical applications of nonequilibrium atmospheric pressure plasma in cancer therapy have attracted attention. We previously reported on the antitumor effect of plasma-activated medium. However, this approach requires plasma-activated liquids that are administrable to the human body. In this study, we produced plasma-activated lactated Ringer's solution (PAL) and evaluated its antitumor effect and mechanism. Furthermore, we evaluated the effect of the intraperitoneal administration of PAL using a peritoneal dissemination mouse tumor model...
November 14, 2017: Annals of Surgical Oncology
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