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https://www.readbyqxmd.com/read/28439784/practical-calculation-method-to-estimate-the-absolute-boron-concentration-in-tissues-using-18-f-fbpa-pet
#1
Tadashi Watabe, Kohei Hanaoka, Sadahiro Naka, Yasukazu Kanai, Hayato Ikeda, Masanao Aoki, Eku Shimosegawa, Mitsunori Kirihata, Jun Hatazawa
PURPOSE: The purpose of this study was to establish a practical method to estimate the absolute boron concentrations in the tissues based on the standardized uptake values (SUVs) after administration of 4-borono-phenylalanine (BPA) using 4-borono-2-(18)F-fluoro-phenylalanine ((18)F-FBPA) PET. METHODS: Rat xenograft models of C6 glioma (n = 7, body weight 241 ± 28.0 g) were used for the study. PET was performed 60 min after intravenous injection of (18)F-FBPA (30...
April 24, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28390868/small-nucleolar-noncoding-rna-snora23-upregulated-in-human-pancreatic-ductal-adenocarcinoma-regulates-expression-of-syne2-to-promote-growth-and-metastasis-of-xenograft-tumors-in-mice
#2
Lin Cui, Kenji Nakano, Sumalee Obchoei, Kiyoko Setoguchi, Masaki Matsumoto, Tsuyoshi Yamamoto, Satoshi Obika, Kazuaki Shimada, Nobuyoshi Hiraoka
BACKGROUND & AIMS: Small nucleolar noncoding RNAs (snoRNAs) regulate function of ribosomes, and specific snoRNAs are dysregulated in some cancer cells. We investigated dysregulation of snoRNAs in pancreatic ductal adenocarcinoma (PDAC) cells. METHODS: We investigated snoRNA expression in PDAC cell lines by cDNA microarray and quantitative reverse transcription (qRT)-PCR. In PDAC (n=133), intraductal papillary mucinous neoplasm (IPMN, n=16), mucinous cystic neoplasm-associated PDAC (n=1), and non-tumor pancreas (n=8) and liver (n=3) tissues from subjects who underwent surgical resection, levels of snoRNA were measured by qRT-PCR and compared with clinicopathological parameters and survival times determined by Kaplan Meier analysis...
April 5, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28242812/crispr-knockout-of-the-hur-gene-causes-a-xenograft-lethal-phenotype
#3
Shruti Lal, Edwin C Cheung, Mahsa Zarei, Ranjan Preet, Saswati N Chand, Nicole C Mambelli-Lisboa, Carmella Romeo, Matthew C Stout, Eric Londin, Austin Goetz, Cinthya Y Lowder, Avinoam Nevler, Charles J Yeo, Paul M Campbell, Jordan M Winter, Dan A Dixon, Jonathan R Brody
Pancreatic ductal adenocarcinoma (PDA) is the third leading cause of cancer-related deaths in the United States, whereas colorectal cancer is the third most common cancer. The RNA-binding protein HuR (ELAVL1) supports a pro-oncogenic network in gastrointestinal (GI) cancer cells through enhanced HuR expression. Using a publically available database, HuR expression levels were determined to be increased in primary PDA and colorectal cancer tumor cohorts as compared with normal pancreas and colon tissues, respectively...
February 27, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28123722/systematic-analysis-of-the-achaete-scute-complex-like-gene-signature-in-clinical-cancer-patients
#4
Chih-Yang Wang, Payam Shahi, John Ting Wei Huang, Nam Nhut Phan, Zhengda Sun, Yen-Chang Lin, Ming-Derg Lai, Zena Werb
The achaete-scute complex-like (ASCL) family, also referred to as 'achaete-scute complex homolog' or 'achaete-scute family basic helix-loop-helix transcription factor', is critical for proper development of the nervous system and deregulation of ASCL plays a key role in psychiatric and neurological disorders. The ASCL family consists of five members, namely ASCL1, ASCL2, ASCL3, ASCL4 and ASCL5. The ASCL1 gene serves as a potential oncogene during lung cancer development. There is a correlation between increased ASCL2 expression and colon cancer development...
January 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28032597/elevation-of-%C3%AE-galactoside-%C3%AE-2-6-sialyltransferase-1-in-a-fructoseresponsive-manner-promotes-pancreatic-cancer-metastasis
#5
Chi-Che Hsieh, Yi-Ming Shyr, Wen-Ying Liao, Tien-Hua Chen, Shin-E Wang, Peir-Chuen Lu, Pei-Yu Lin, Yan-Bo Chen, Wan-Yu Mao, Hsin-Ying Han, Michael Hsiao, Wen-Bin Yang, Wen-Shan Li, Yuh-Pyng Sher, Chia-Ning Shen
Pancreatic ductal adenocarcinoma (PDAC) is an aggressive type of pancreatic cancer with clinical characteristics of local invasion and early metastasis. Recent cohort studies indicate high fructose intake is associated with an increase in pancreatic cancer risk. However, the mechanisms by which fructose promotes pancreatic tumorigenesis remain unclear. Herein, Kras+/LSLG12D mice were crossed with Elas-CreER transgenic mice to determine whether fructose intake directly contributes to tumor formation. Orthotopic tumor-xenograft experiments were performed to determine whether fructose substitution enhances the metastatic potential of PDAC cells...
January 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28028124/characterizing-gemcitabine-effects-administered-as-single-agent-or-combined-with-carboplatin-in-mice-pancreatic-and-ovarian-cancer-xenografts-a-semimechanistic-pharmacokinetic-pharmacodynamics-tumor-growth-response-model
#6
Maria Garcia-Cremades, Celine Pitou, Philip W Iversen, Iñaki F Troconiz
In this work, a semimechanistic tumor growth-response model for gemcitabine in pancreatic (administered as single agent) and ovarian (given as single agent and in combination with carboplatin) cancer in mice was developed. Tumor profiles were obtained from nude mice, previously inoculated with KP4, ASPC1, MIA PACA2, PANC1 (pancreas), A2780, or SKOV3×luc (ovarian) cell lines, and then treated with different dosing schedules of gemcitabine and/or carboplatin. Data were fitted using the population approach with Nonlinear Mixed Effect Models 7...
March 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/27980050/in-vivo-pet-imaging-of-the-cancer-integrin-%C3%AE-v%C3%AE-6-using-gallium-68-labelled-cyclic-rgd-nonapeptides
#7
Johannes Notni, Dominik Reich, Oleg V Maltsev, Tobias G Kapp, Katja Steiger, Frauke Hoffmann, Irene Esposito, Wilko Weichert, Horst Kessler, Hans-Jürgen Wester
Expression of the cellular transmembrane receptor αvβ6 integrin is essentially restricted to malignant epithelial cells in carcinomas of a broad variety of lineages, while it is virtually absent in normal adult tissues. Thus, it is a highly attractive target for tumor imaging and therapy. Furthermore, αvβ6 integrin plays an important role for the epithelial-mesenchymal interaction and the development of fibrosis. METHODS: On the basis of the Gallium-68 chelators TRAP (triazacyclononane-triphosphinate) and NODAGA, we synthesized mono- di- and trimeric conjugates of the αvβ6 integrinselective peptide cyclo(FRGDLAFp(NMe)K) via click chemistry (CuAAC)...
December 15, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27941872/er-stress-protein-agr2-precedes-and-is-involved-in-the-regulation-of-pancreatic-cancer-initiation
#8
L Dumartin, W Alrawashdeh, S M Trabulo, T P Radon, K Steiger, R M Feakins, M P di Magliano, C Heeschen, I Esposito, N R Lemoine, T Crnogorac-Jurcevic
The mechanisms of initiation of pancreatic ductal adenocarcinoma (PDAC) are still largely unknown. In the present study, we analysed the role of anterior gradient-2 (AGR2) in the earliest stages of pancreatic neoplasia. Immunohistochemical analysis of chronic pancreatitis (CP) and peritumoral areas in PDAC tissues showed that AGR2 was present in tubular complexes (TC) and early pancreatic intraepithelial neoplasia (PanINs). Moreover, AGR2 was also found in discrete subpopulations of non-transformed cells neighbouring these pre-neoplastic lesions...
December 12, 2016: Oncogene
https://www.readbyqxmd.com/read/27901481/human-pancreatic-cancer-xenografts-recapitulate-key-aspects-of-cancer-cachexia
#9
Daniel Delitto, Sarah M Judge, Andrea E Delitto, Rachel L Nosacka, Fernanda G Rocha, Bayli B DiVita, Michael H Gerber, Thomas J George, Kevin E Behrns, Steven J Hughes, Shannon M Wallet, Andrew R Judge, Jose G Trevino
Cancer cachexia represents a debilitating syndrome that diminishes quality of life and augments the toxicities of conventional treatments. Cancer cachexia is particularly debilitating in patients with pancreatic cancer (PC). Mechanisms responsible for cancer cachexia are under investigation and are largely derived from observations in syngeneic murine models of cancer which are limited in PC. We evaluate the effect of human PC cells on both muscle wasting and the systemic inflammatory milieu potentially contributing to PC-associated cachexia...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/27829362/castin-a-system-for-comprehensive-analysis-of-cancer-stromal-interactome
#10
Daisuke Komura, Takayuki Isagawa, Kazuki Kishi, Ryohei Suzuki, Reiko Sato, Mariko Tanaka, Hiroto Katoh, Shogo Yamamoto, Kenji Tatsuno, Masashi Fukayama, Hiroyuki Aburatani, Shumpei Ishikawa
BACKGROUND: Cancer microenvironment plays a vital role in cancer development and progression, and cancer-stromal interactions have been recognized as important targets for cancer therapy. However, identifying relevant and druggable cancer-stromal interactions is challenging due to the lack of quantitative methods to analyze whole cancer-stromal interactome. RESULTS: We present CASTIN (CAncer-STromal INteractome analysis), a novel framework for the evaluation of cancer-stromal interactome from RNA-Seq data using cancer xenograft models...
November 9, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27812005/biodistribution-of-cisplatin-revealed-by-imaging-mass-cytometry-identifies-extensive-collagen-binding-in-tumor-and-normal-tissues
#11
Qing Chang, Olga I Ornatsky, Iram Siddiqui, Rita Straus, Vladimir I Baranov, David W Hedley
Imaging mass cytometry was used for direct visualization of platinum localization in tissue sections from tumor and normal tissues of cisplatin-treated mice bearing pancreas cancer patient-derived xenografts. This recently-developed technology enabled simultaneous detection of multiple markers to define cell lineage, DNA damage response, cell proliferation and functional state, providing a highly detailed view of drug incorporation in tumor and normal tissues at the cellular level. A striking and unanticipated finding was the extensive binding of platinum to collagen fibers in both tumor and normal mouse tissues...
November 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27765857/assessment-of-tryptophan-uptake-and-kinetics-using-1-2-18f-fluoroethyl-l-tryptophan-and-%C3%AE-11c-methyl-l-tryptophan-pet-imaging-in-mice-implanted-with-patient-derived-brain-tumor-xenografts
#12
Sharon K Michelhaugh, Otto Muzik, Anthony R Guastella, Neil V Klinger, Lisa A Polin, Hancheng Cai, Yangchun Xin, Thomas J Mangner, Shaohui Zhang, Csaba Juhász, Sandeep Mittal
Abnormal tryptophan metabolism via the kynurenine pathway is involved in the pathophysiology of a variety of human diseases including cancers. α-(11)C-methyl-l-tryptophan ((11)C-AMT) PET imaging demonstrated increased tryptophan uptake and trapping in epileptic foci and brain tumors, but the short half-life of (11)C limits its widespread clinical application. Recent in vitro studies suggested that the novel radiotracer 1-(2-(18)F-fluoroethyl)-l-tryptophan ((18)F-FETrp) may be useful to assess tryptophan metabolism via the kynurenine pathway...
February 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27633923/human-pluripotent-stem-cell-derived-acinar-ductal-organoids-generate-human-pancreas-upon-orthotopic-transplantation-and-allow-disease-modelling
#13
Meike Hohwieler, Anett Illing, Patrick C Hermann, Tobias Mayer, Marianne Stockmann, Lukas Perkhofer, Tim Eiseler, Justin S Antony, Martin Müller, Susanne Renz, Chao-Chung Kuo, Qiong Lin, Matthias Sendler, Markus Breunig, Susanne M Kleiderman, André Lechel, Martin Zenker, Michael Leichsenring, Jonas Rosendahl, Martin Zenke, Bruno Sainz, Julia Mayerle, Ivan G Costa, Thomas Seufferlein, Michael Kormann, Martin Wagner, Stefan Liebau, Alexander Kleger
OBJECTIVE: The generation of acinar and ductal cells from human pluripotent stem cells (PSCs) is a poorly studied process, although various diseases arise from this compartment. DESIGN: We designed a straightforward approach to direct human PSCs towards pancreatic organoids resembling acinar and ductal progeny. RESULTS: Extensive phenotyping of the organoids not only shows the appropriate marker profile but also ultrastructural, global gene expression and functional hallmarks of the human pancreas in the dish...
September 15, 2016: Gut
https://www.readbyqxmd.com/read/27609789/68ga-177lu-neobomb1-a-novel-radiolabeled-grpr-antagonist-for-theranostic-use-in-oncology
#14
Simone U Dalm, Ingrid L Bakker, Erik de Blois, Gabriela N Doeswijk, Mark W Konijnenberg, Francesca Orlandi, Donato Barbato, Mattia Tedesco, Theodosia Maina, Berthold A Nock, Marion de Jong
Because overexpression of the gastrin-releasing peptide receptor (GRPR) has been reported on various cancer types, for example, prostate cancer and breast cancer, targeting this receptor with radioligands might have a significant impact on staging and treatment of GRPR-expressing tumors. NeoBOMB1 is a novel DOTA-coupled GRPR antagonist with high affinity for GRPR and excellent in vivo stability. The purpose of this preclinical study was to further explore the use of NeoBOMB1 for theranostic application by determining the biodistribution of (68)Ga-NeoBOMB1 and (177)Lu-NeoBOMB1...
February 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27553727/explorative-study-on-the-anticancer-activity-selectivity-and-metabolic-stability-of-related-analogs-of-aminosteroid-rm-133
#15
Martin Perreault, René Maltais, Raphaël Dutour, Donald Poirier
RM-133 is a key representative of a new family of aminosteroids reported as potent anticancer agents. Although RM-133 produced interesting results in 4 mouse xenograft cancer models when injected subcutaneously, it needs to be improved to increase its in vivo potency. Thus, to obtain an analog of RM-133 with a better drug potential, a structure-activity relationship study was conducted by synthesizing eleven RM-133-related compounds and addressing their antiproliferative activity on 3 human cancer cells (HL-60, OVCAR-3 and PANC-1) and 3 human normal cell lines (primary ovary, pancreas and renal proximal tubule) as well as their metabolic stability in human liver microsomes...
November 2016: Steroids
https://www.readbyqxmd.com/read/27552306/porphysome-nanoparticles-for-enhanced-photothermal-therapy-in-a-patient-derived-orthotopic-pancreas-xenograft-cancer-model-a-pilot-study
#16
Christina M MacLaughlin, Lili Ding, Cheng Jin, Pingjiang Cao, Iram Siddiqui, David M Hwang, Juan Chen, Brian C Wilson, Gang Zheng, David W Hedley
No abstract text is available yet for this article.
August 1, 2016: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/27529726/design-synthesis-and-evaluation-of-a-neurokinin-1-receptor-targeted-near-ir-dye-for-fluorescence-guided-surgery-of-neuroendocrine-cancers
#17
Ananda Kumar Kanduluru, Madduri Srinivasarao, Philip S Low
The neurokinin-1 receptor (NK1R) is implicated in the growth and metastasis of many tumors, including cancers of the brain (e.g., gliomas, glioblastomas, and astrocytomas), skin (e.g., melanomas), and neuroendocrine tissues (cancers of the breast, stomach, pancreas, larynx, and colon). Because overexpression of NK1R has been reported in most of these malignancies, we have undertaken designing an NK1R-targeted near-infrared (NIR) fluorescent dye for fluorescence-guided surgeries of these cancers. We demonstrate here that an NK1R-binding ligand linked to the NIR dye LS288 selectively accumulates in NK1R-expressing tumor xenografts with high affinity (Kd = 13 nM), allowing intraoperative imaging of these cancers in live mice...
September 21, 2016: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/27517501/genetic-strategies-to-bring-islet-xenotransplantation-to-the-clinic
#18
Wayne J Hawthorne, Andrew M Lew, Helen E Thomas
PURPOSE OF REVIEW: Despite the benefits of islet and pancreas allotransplantation, their widespread use in type 1 diabetes is limited because of the paucity of suitable donors. Porcine xenotransplantation offers an alternative, and advances in genetic modification of pigs have opened up new potential for its clinical use. This review outlines the barriers to successful islet xenotransplantation, and genetic modifications that have been tested to overcome these. RECENT FINDINGS: Islets from pigs lacking α1,3-galactosyltransferase, to prevent hyperacute rejection, are now used as a background strain for further genetic modifications...
October 2016: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/27386488/pdx1-associated-therapy-in-translational-medicine
#19
REVIEW
Juehua Yu, Shi-He Liu, Robbi Sanchez, John Nemunaitis, Enrique Rozengurt, F Charles Brunicardi
Pancreatic ductal adenocarcinoma (PDAC) is characterized by an extremely poor prognosis and a low median survival due to lack of the early and reliable detection and effective therapeutic options, despite improvements observed for many other cancers in last decade. Pancreatic and duodenal homeobox 1 (PDX1), which is a homeodomain-containing transcription factor and a key regulator for insulin gene expression, β cell maturation and proper β cell function maintenance in the pancreas. Our previous studies revealed that PDX1 promotes tumorigenesis and it is a promising therapeutic target for PDAC...
June 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27207778/lgr5-targeted-antibody-drug-conjugate-eradicates-gastrointestinal-tumors-and-prevents-recurrence
#20
Xing Gong, Ali Azhdarinia, Sukhen C Ghosh, Wei Xiong, Zhiqiang An, Qingyun Liu, Kendra S Carmon
Gastrointestinal cancer is one of the leading causes of cancer-related mortality in men and women worldwide. The adult stem cell marker LGR5 (leucine-rich repeat-containing, G protein-coupled receptor 5) is highly expressed in a significant fraction of gastrointestinal tumors of the colon, liver, pancreas, and stomach, relative to normal tissues. LGR5 is located on the cell surface and undergoes rapid, constitutive internalization independent of ligand. Furthermore, LGR5-high cancer cells have been shown to exhibit the properties of tumor-initiating cells or cancer stem cells (CSC)...
July 2016: Molecular Cancer Therapeutics
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