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https://www.readbyqxmd.com/read/29678458/immunization-of-balb-c-mice-with-a-combination-of-four-recombinant-brucella-abortus-proteins-aspc-dps-inpb-and-ndk-confers-a-marked-protection-against-a-virulent-strain-of-brucella-abortus
#1
Huynh Tan Hop, Lauren Togonon Arayan, Tran Xuan Ngoc Huy, Alisha Wehdnesday Bernardo Reyes, WonGi Min, Hu Jang Lee, Soo Jong Park, Hong Hee Chang, Suk Kim
In this study, we assessed the protective efficacy of single subunit vaccines, encoded by the B. abortus 544 genes aspC, dps, yaeC and inpB, against B. abortus infection in mice. First, immunization with these antigens, with the exception of the YaeC protein, was found to elicit both humoral and cellular immune responses with IgG2a being dominant over IgG1. In addition, a massive production of IFN-γ but lower degree of IL-10 was observed, suggesting that all three antigens were able to induce predominantly cell-mediated immunity in response to B...
April 17, 2018: Vaccine
https://www.readbyqxmd.com/read/29656202/syntheses-and-anti-pancreatic-cancer-activities-of-rakicidin-a-analogues
#2
Jian Chen, Jingpei Li, Lingling Wu, Yan Geng, Jianming Yu, Chuanke Chong, Mengmeng Wang, Yuan Gao, Cuigai Bai, Yahui Ding, Yue Chen, Quan Zhang
Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive malignant tumor and resistant to most therapies. Pancreatic cancer stem cells (PCSCs) had critical role in regulating PDAC progression, metastasis, and drug resistance. Therefore, targeting PCSCs is considered to be a promising strategy for treatment of PDAC. However, there is no effective drug that can selectively ablate PCSCs. A series of twenty rakicidin A analogues were synthesized via a combinatorial strategy and evaluated for their anti-PDAC activities, and the structure-activity relationship was also discussed...
March 29, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29619850/salinomycin-nanoparticles-interfere-with-tumor-cell-growth-and-the-tumor-microenvironment-in-an-orthotopic-model-of-pancreatic-cancer
#3
Zahra Daman, Homa Faghihi, Hamed Montazeri
Recently, Salinomycin (SAL) has been reported to inhibit proliferation and induce apoptosis in various tumors. The aim of this study was to deliver SAL to orthotopic model of pancreatic cancer by the aid of poly (lactic-co-glycolic acid) (PLGA) nanoparticles. The nanoparticles were physico-chemically characterized and evaluated for cytotoxicity on Luciferase-transduced AsPC-1 cells in vitro as well as implanted orthotopically into the pancreas of nude mice. SAL (3.5 mg/kg every other day) blocked tumor growth by 52% compared to the control group after 3 weeks of therapy...
April 5, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29599308/differential-organ-targeting-and-cellular-characteristics-of-metastatic-human-pancreatic-cancer-cell-lines-in-mouse-models
#4
Tomoyuki Satake, Atsushi Suetsugu, Miki Nakamura, Kosuke Hasegawa, Takahiro Kunisada, Masahito Shimizu, Shigetoyo Saji, Hisataka Moriwaki, Robert M Hoffman
BACKGROUND/AIM: The lethal characteristic of pancreatic cancer is metastasis which is recalcitrant to currently-used chemotherapy. Our aim was to understand metastasis at the cellular level. We previously reported that multi-nucleate cells or spindle cells were more prominent in pancreatic cancer metastasis than in the primary tumor. In the present report, we investigated four representative human pancreatic cell lines for differences in cell morphology between the primary tumor and various metastatic organ targets for each cell line...
April 2018: Anticancer Research
https://www.readbyqxmd.com/read/29566409/botryane-sesquiterpenoids-cyclopentadepsipeptides-xanthones-and-trichothecenes-from-trichoderma-oligosporum
#5
Baosong Chen, Erwei Li, Li Liu, Mingfang Liao, Zhaoxiang Zhu, Wenying Zhuang, Li Bao, Hongwei Liu
Five new botryane sesquiterpenes (1: -5: ), one new cyclopentadepsipeptide (9: ), and two new xanthones (11:  - 12: ), together with 11 known compounds, were isolated from Trichoderma oligosporum . The structures of the new compounds were identified by comprehensive spectroscopic methods including nuclear magnetic resonance and mass spectrometry. The cytotoxicity of 1: -19: was evaluated against K562, A549, and ASPC cell lines. Compounds 5, 8, 11, 17: , and 18: showed cytotoxicity against the K562 cell line with more than 50% inhibition at 12...
March 22, 2018: Planta Medica
https://www.readbyqxmd.com/read/29532883/lncrna-bc032020-suppresses-the-survival-of-human-pancreatic-ductal-adenocarcinoma-cells-by-targeting-znf451
#6
Zhipeng Zhang, Hongxi Chen, Yebin Lu, Tiecheng Feng, Weijia Sun
This study examined the effects of long non‑coding RNA (lncRNA) BC032020 on the development of human pancreatic ductal adenocarcinoma (PDAC), and the potential molecular mechanisms responsible for these effects. The expression of BC032020 was assessed in 20 pairs of PDAC tumor tissues and adjacent normal tissues. The overexpression of BC032020 was enforced in the AsPC‑1 and PANC‑1 cells, and the effects on cell proliferation, cell cycle distribution, cell migration and apoptosis were determined. We also analyzed the functions of zinc finger protein 451 (ZNF451), which shares a gene sequence with two exons of BC032020 and a non‑coding region with another two exons, in PDAC cells...
April 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29486633/loss-of-arid1a-expression-correlates-with-tumor-differentiation-and-tumor-progression-stage-in-pancreatic-ductal-adenocarcinoma
#7
Li Zhang, Cuiping Wang, Shuangni Yu, Congwei Jia, Jie Yan, Zhaohui Lu, Jie Chen
Mutations in the AT-rich interactive domain 1A gene, which encodes a subunit of the Switch/Sucrose nonfermentable chromatin remodeling complex, can result in loss of protein expression and are associated with different cancers. Here, we used immunohistochemistry to investigate the significance of AT-rich interactive domain 1A loss in 73 pancreatic ductal adenocarcinoma cases with paired paracancerous normal pancreatic tissues. The relationship between levels of the AT-rich interactive domain 1A protein product, BAF250a, and clinicopathological parameters in the 73 pancreatic cancer specimens was also analyzed...
January 1, 2018: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29467942/-in-vitro-in-vivo-and-ex-vivo-demonstration-of-the-antitumoral-role-of-hypocretin-1-orexin-a-and-almorexant-in-pancreatic-ductal-adenocarcinoma
#8
Stéphanie Dayot, Daniela Speisky, Anne Couvelard, Pierre Bourgoin, Valérie Gratio, Jérôme Cros, Vinciane Rebours, Alain Sauvanet, Pierre Bedossa, Valérie Paradis, Philippe Ruszniewski, Alain Couvineau, Thierry Voisin
Pancreatic ductal adenocarcinoma (PDAC) is still the poorest prognostic tumor of the digestive system. We investigated the antitumoral role of orexin-A and almorexant in PDAC. We analyzed the orexin receptor type 1 (OX1R) expression by immunohistochemistry in human normal pancreas, PDAC and its precursor dysplastic intraepithelial lesions. We used PDAC-derived cell lines and fresh tissue slices to study the apoptotic role of hypocretin-1/orexin-A and almorexant in vitro and ex vivo . We analyzed in vivo the hypocretin-1/orexin-A and almorexant effect on tumor growth in mice xenografted with PDAC cell lines expressing, or not, OX1R...
January 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29435178/inhibition-of-the-mek-erk-pathway-augments-nab-paclitaxel-based-chemotherapy-effects-in-preclinical-models-of-pancreatic-cancer
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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...
March 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29277891/fluorescence-and-multispectral-optoacoustic-imaging-for-an-optimized-detection-of-deeply-located-tumors-in-an-orthotopic-mouse-model-of-pancreatic-carcinoma
#20
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 tumor 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; 27 days after orthotopic transplantation of human AsPC-1 cells into the head of the pancreas, mice were injected with cRGD-800CW-TCO and imaged with fluorescence- and optoacoustic devices before and 2, 6 and 24 hr after injection, before they were sacrificed and dissected with a guidance of FGS imaging system...
May 15, 2018: International Journal of Cancer. Journal International du Cancer
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