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https://www.readbyqxmd.com/read/28869219/andrographolide-sensitizes-prostate-cancer-cells-to-trail-induced-apoptosis
#1
Ruo-Jing Wei, Xin-Shi Zhang, Da-Lin He
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a promising agent for anticancer therapy. The identification of small molecules that can establish the sensitivity of prostate cancer (PCa) cells to TRAIL-induced apoptosis is crucial for the targeted treatment of PCa. PC3, DU145, JAC-1, TsuPr1, and LNCaP cells were treated with Andrographolide (Andro) and TRAIL, and the apoptosis was measured using the Annexin V/PI double staining method. Real time-polymerase chain reaction (PCR) and Western blot analysis were performed to measure the expression levels of target molecules...
September 1, 2017: Asian Journal of Andrology
https://www.readbyqxmd.com/read/28846663/chemopreventive-potential-of-ethanolic-extracts-of-luobuma-leaves-apocynum-venetum-l-in-androgen-insensitive-prostate-cancer
#2
Szu-Ping Huang, Tzu-Ming Ho, Chih-Wen Yang, Ya-Ju Chang, Jie-Fu Chen, Ning-Sing Shaw, Jia-Cherng Horng, Shih-Lan Hsu, Ming-Yuan Liao, Li-Chen Wu, Ja-An Annie Ho
Luobuma (Apocynum venetum L. (AVL)) is a popular beverage in Asia and has been reportedly to be associated with the bioactivities such as cardiotonic, diuretic, antioxidative, and antihypertensive. However, its biofunction as chemoprevention activity is seldom addressed. Herein, we aimed to characterize the anti-androgen-insensitive-prostate-cancer (anti-AIPC) bioactive compounds of Luobuma, and to investigate the associated molecular mechanisms. Activity-guided-fractionation (antioxidative activity and cell survivability) of Luobuma ethanolic extracts was performed to isolate and characterize the major bioactive compounds using Ultra Performance Liquid Chromatography (UPLC), Liquid Chromatography-Mass Spectrometry (LC-MS), and Nuclear Magnetic Resonance (NMR)...
August 28, 2017: Nutrients
https://www.readbyqxmd.com/read/28765552/antitumoral-effects-of-%C3%AE-cdcpli-a-pla2-inhibitor-from-crotalus-durissus-collilineatus-via-pi3k-akt-pathway-on-mda-mb-231-breast-cancer-cell
#3
Sarah N C Gimenes, Daiana S Lopes, Patrícia T Alves, Fernanda V P V Azevedo, Lara Vecchi, Luiz R Goulart, Thais C S Rodrigues, André L Q Santos, Vera L de C Brites, Thaise L Teixeira, Cláudio V da Silva, Matheus H Dias, Samuel C Teixeira, Renata S Rodrigues, Kelly A G Yoneyama, Ricardo A Oliveira, Veridiana de M Rodrigues
Phospholipases A2 (PLA2s) overexpression is closely associated with the malignant potential of breast cancers. Here, we showed for the first the antitumoral effects of γCdcPLI, a PLA2 inhibitor from Crotalus durissus collilineatus via PI3K/Akt pathway on MDA-MB-231 cell. Firstly, γCdcPLI was more cytotoxic to MDA-MB-231 breast cancer cells than other cell lines (MCF-7, HeLa, PC3 and A549) and did not affect the viability of non-tumorigenic breast cell (MCF 10A). In addition, γCdcPLI induced modulation of important mediators of apoptosis pathways such as p53, MAPK-ERK, BIRC5 and MDM2...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28624236/regulation-of-the-proprotein-convertases-expression-and-activity-during-regenerative-angiogenesis-role-of-hypoxia-inducible-factor-hif
#4
Jia Ma, Serge Evrard, Iker Badiola, Geraldine Siegfried, Abdel-Majid Khatib
Proprotein convertases (PCs) are involved in various physiological and pathological processes ranging from embryogenesis to carcinogenesis. Here, using the zebrafish fin regeneration model, we report induced expression of furin and PC5 but not PACE4 and PC7 during fin regeneration that is associated with increased PC activity. Stabilization of HIF by cobalt chloride (CoCl2) further increases these processes. The use of the general PC-inhibitor decanoyl-RVKR-cholromethyl ketone (CMK) inhibited control and CoCl2-induced PC activity...
August 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28551639/a-novel-near-infrared-fluorescent-protein-irfp720-facilitates-transcriptional-profiling-of-prostate-cancer-bone-metastasis-in-mice
#5
Mariko Honda, Satomi Yogosawa, Minori Kamada, Yuko Kamata, Takahiro Kimura, Yusuke Koike, Toru Harada, Hiroyuki Takahashi, Shin Egawa, Kiyotsugu Yoshida
BACKGROUND: Bone represents a frequent site of prostate cancer metastasis. As the molecular mechanism remains unclear, an accessible animal model is required. MATERIALS AND METHODS: We established a novel murine metastasis model using near-infrared fluorescent protein iRFP720-labelled prostate cancer (PC3) cells. To clarify transcriptional alterations during metastasis, iRFP720-PC3 cells were intracardially injected into male mice. mRNA expression profiles of metastasis in bone using marrow cancer cells extracted by centrifugal separation and cell sorting were compared with those of parental cells by microarray...
June 2017: Anticancer Research
https://www.readbyqxmd.com/read/28525372/overexpression-of-a-novel-candidate-oncogene-kif14-correlates-with-tumor-progression-and-poor-prognosis-in-prostate-cancer
#6
Yixiang Zhang, Yeqing Yuan, Pei Liang, Zhaoxia Zhang, Xiaojing Guo, Ligang Xia, Yingying Zhao, Xing-Sheng Shu, Shengkun Sun, Ying Ying, Yingduan Cheng
Prostate cancer (PCa) is the second leading cause of death from cancer in men. The mechanism underlying tumorigenesis and development of PCa is largely unknown. Here, we identified Kinesin family member 14 (KIF14) as a novel candidate oncogene in PCa. We found that KIF14 was overexpressed in multiple PCa cell lines and primary PCa tissues. Knockdown of KIF14 in DU145 and PC3 prostate cancer cells suppressed cell proliferation, induced cell cycle arrest and apoptosis. Transcriptome analysis by RNA-sequencing demonstrated that KIF4 suppression led to transcriptional changes of genes involved in p53 and TGF-beta signaling pathway...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28485104/microrna-181a-promotes-docetaxel-resistance-in-prostate-cancer-cells
#7
Cameron M Armstrong, Chengfei Liu, Wei Lou, Alan P Lombard, Christopher P Evans, Allen C Gao
BACKGROUND: Docetaxel is one of the primary drugs used for treating castration resistant prostate cancer (CRPC). Unfortunately, over time patients invariably develop resistance to docetaxel therapy and their disease will continue to progress. The mechanisms by which resistance develops are still incompletely understood. This study seeks to determine the involvement of miRNAs, specifically miR-181a, in docetaxel resistance in CRPC. METHODS: Real-time PCR was used to measure miR-181a expression in parental and docetaxel resistant C4-2B and DU145 cells (TaxR and DU145-DTXR)...
June 2017: Prostate
https://www.readbyqxmd.com/read/28454475/oridonin-induces-g2-m-cell-cycle-arrest-and-apoptosis-via-the-pi3k-akt-signaling-pathway-in-hormone-independent-prostate-cancer-cells
#8
Jianlei Lu, Xiang Chen, Shuang Qu, Bing Yao, Yuexin Xu, Jiahui Wu, Yucui Jin, Changyan Ma
Oridonin is an active constituent isolated from the traditional Chinese herb Rabdosia rubescens, which exerts antitumor effects in experimental and clinical settings. However, its antitumor effects and underlying mechanisms on prostate cancer cells have not yet been clearly identified. In the present study, the androgen-independent prostate cancer PC3 and DU145 cell lines were used as models to investigate the effects and possible mechanisms of oridonin on cellular proliferation and apoptosis. Results demonstrated that oridonin inhibited cellular proliferation, and was able to significantly induce G2/M cell cycle arrest and apoptosis...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28259690/the-herbal-medicine-melissa-officinalis-extract-effects-on-gene-expression-of-p53-bcl-2-her2-vegf-a-and-htert-in-human-lung-breast-and-prostate-cancer-cell-lines
#9
Rana Jahanban-Esfahlan, Khaled Seidi, Amir Monfaredan, Vahid Shafie-Irannejad, Mehran Mesgari Abbasi, Ansar Karimian, Bahman Yousefi
INTRODUCTION: Earlier, we verified that Melissa officinalis extract (MOE) elicits potent antiproliferative effects on different human cancer cells. To gain insights into the molecular mechanisms accounting for the cytotoxic effects of MOE, we assessed the expression patterns of several prominent molecules with therapeutic potential in cancer by Quantitative PCR (Q-PCR). METHODS: A549, MCF-7 and PC3 cancer cells were grown in complete RPMI 1640 and seeded in 24 well micro plates...
May 20, 2017: Gene
https://www.readbyqxmd.com/read/28242062/synthesis-and-topoisomerase-i-inhibitory-properties-of-klavuzon-derivatives
#10
İsmail Akçok, Derya Mete, Ayhan Şen, Pınar Kasaplar, Kemal S Korkmaz, Ali Çağır
Klavuzon is a naphthalen-1-yl substituted α,β-unsaturated δ-lactone derivative, and is one of the anti-proliferative members of this class of compounds. Asymmetric and racemic syntheses of novel α,β-unsaturated δ-lactone derivatives are important to investigate their potential for the treatment of cancer. In this study, asymmetric and racemic syntheses of heteroatom-substituted klavuzon derivatives are reported. The syntheses were completed by a well-known three-step procedure. Anti-proliferative activity of seven novel racemic klavuzon derivatives were reported against MCF-7, PC3, HCT116 p53+/+ and HCT116 p53-/- cancer cell lines...
April 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28199187/combinatorial-effect-of-curcumin-with-docetaxel-modulates-apoptotic-and-cell-survival-molecules-in-prostate-cancer
#11
Saswati Banerjee, Santosh K Singh, Indrajit Chowdhury, James W Lillard, Rajesh Singh
Docetaxel is the most commonly used chemotherapeutic agent to target androgen signaling in metastatic prostate cancer (PCa); however, prolonged treatment with docetaxel results in drug-resistant cancer cells. Combination therapies have the potential of increasing the effectiveness of drug treatment as well as decreasing the side effects. Curcumin is a nontoxic organic compound with multifaceted chemopreventive potential. In this study, we evaluated whether curcumin can reinforce the effect of docetaxel on PCa cells...
March 1, 2017: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28193499/growth-hormone-releasing-hormone-ghrh-promotes-metastatic-phenotypes-through-egfr-her2-transactivation-in-prostate-cancer-cells
#12
Laura Muñoz-Moreno, Ana M Bajo, Juan C Prieto, María J Carmena
The involvement of growth hormone-releasing hormone (GHRH) in several relevant processes that contribute to prostate cancer progression was analyzed. Firstly, we evaluated GHRH effects on cell proliferation and adhesion in human cancer prostate cell lines, LNCaP and PC3, by using specific assays (BrdU incorporation and collagen adhesion). The expression levels of the main marker molecules of these processes were measured by RT-PCR, Western blotting and zymography assays. GHRH increased both cell proliferation and proliferating cell nuclear antigen (PCNA) levels in LNCaP cells and in PC3 cells; however, such a rise was faster in the PC3 cells that represent the most aggressive stage of prostate cancer...
May 5, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28181816/induction-of-oxidants-distinguishes-susceptibility-of-prostate-carcinoma-cell-lines-to-p53-gene-transfer-mediated-by-an-improved-adenoviral-vector
#13
Rodrigo Esaki Tamura, Aline Hunger, Denise C Fernandes, Francisco R Laurindo, Eugenia Costanzi-Strauss, Bryan E Strauss
Previously, the authors developed an adenoviral vector, Ad-PG, where transgene expression is regulated by a p53-responsive promoter. When used to transfer the p53 cDNA, a positive feedback mechanism is established. In the present study, a critical comparison is performed between Ad-PGp53 and AdRGD-PGp53, where the RGD motif was incorporated in the adenoviral fiber protein. AdRGD-PGp53 provided superior transgene expression levels and resulted in the killing of prostate carcinoma cell lines DU145 and PC3. In vitro, this effect was associated with increased production of cytoplasmic and mitochondrial oxidants, DNA damage as revealed by detection of phosphorylated H2AX, as well as cell death consistent with apoptosis...
August 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28152543/asporin-is-a-stromally-expressed-marker-associated-with-prostate-cancer-progression
#14
Annie Rochette, Nadia Boufaied, Eleonora Scarlata, Lucie Hamel, Fadi Brimo, Hayley C Whitaker, Antonio Ramos-Montoya, David E Neal, Alice Dragomir, Armen Aprikian, Simone Chevalier, Axel A Thomson
BACKGROUND: Prostate cancer shows considerable heterogeneity in disease progression and we propose that markers expressed in tumour stroma may be reliable predictors of aggressive tumour subtypes. METHODS: We have used Kaplan-Meier, univariate and multivariate analysis to correlate the expression of Asporin (ASPN) mRNA and protein with prostate cancer progression in independent cohorts. We used immunohistochemistry and H scoring to document stromal localisation of ASPN in a tissue microarray and mouse prostate cancer model, and correlated expression with reactive stroma, defined using Masson Trichrome staining...
March 14, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28119023/a-novel-monoterpenoid-indole-alkaloid-with-anticancer-activity-from-melodinus-khasianus
#15
Jie Zhou, Jin-Hong Feng, Lei Fang
A novel monoterpenoid indole alkaloid with unprecedented 6/5/6/4/6 fused rings, khasuanine A (1), was isolated from the roots of Melodinus khasianus. The structure was determined by extensive analysis of its HR-MS, 1D-, and 2D-NMR spectra. Khasuanine A markedly inhibited the proliferation of PC3 cell with IC50 value of 0.45μM. Further study showed that khasuanine A was able to induce the apoptosis of PC3 cells by activation of caspase 3 and p53, and by inhibition of Bcl-2.
February 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28107698/the-natural-flavonoid-apigenin-sensitizes-human-cd44-prostate-cancer-stem-cells-to-cisplatin-therapy
#16
Suat Erdogan, Kader Turkekul, Rıza Serttas, Zeynep Erdogan
Prostate cancer (PCa) is the second most common type of cancer and the fifth leading cause of cancer-related death among men. Development of chemoresistance, tumor relapse and metastasis remain major barriers to effective treatment and all been identified to be associated with cancer stem cells (CSCs). Natural flavonoids such as apigenin have been shown to have the ability to improve the therapeutic efficacy of common chemotherapy agents through CSCs sensitization. Thus, the aim of this study was to evaluate the combination of apigenin with cisplatin on CD44(+) PCa stem cell growth and migration...
April 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28092770/magnolin-inhibits-prostate-cancer-cell-growth-in-vitro-and-in-vivo
#17
Yeqing Huang, Xiangyu Zou, Xiaowen Zhang, Feng Wang, Weidong Zhu, Guangyuan Zhang, Jun Xiao, Ming Chen
BACKGROUND: Magnolin is the most active ingredient in the herb Magnolia fargesii, which has been traditionally used in oriental medicine to treat headaches and nasal congestion. Recent researches demonstrate that Magnolin inhibits cancer cell migration and invasion. MATERIALS AND METHODS: This study used cell culture and the BALB/c nu/nu mouse xenograft model to investigate whether or not magnolin can inhibit the growth of PC3 and Du145 prostate cancer cells. MTT assay and flow cytometry were performed to estimate the proliferation, cycle, and apoptosis of the cells in vitro...
March 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27713179/the-hedgehog-inhibitor-gant61-sensitizes-prostate-cancer-cells-to-ionizing-radiation-both-in-vitro-and-in-vivo
#18
Annelies Gonnissen, Sofie Isebaert, Chad M McKee, Rüveyda Dok, Karin Haustermans, Ruth J Muschel
Limited data exists regarding the combination of Hedgehog signaling (Hh) inhibition and radiotherapy, even though there are several indications that this might be a promising treatment strategy. In this study, we evaluated the combination of two Hh inhibitors, the SMO inhibitor GDC-0449 and the GLI inhibitor GANT61 with radiotherapy in different prostate cancer (PCa) models. In vitro, GANT61 was able to sensitize 22Rv1 PCa cells but not PC3 and DU145 PCa cells. The lack of radiosensitization in the latter cell lines was shown to be dependent on the presence of mutated p53...
December 20, 2016: Oncotarget
https://www.readbyqxmd.com/read/27711766/cyclometallated-iridium-complexes-inducing-paraptotic-cell-death-like-natural-products-synthesis-structure-and-mechanistic-aspects
#19
Suman Kumar Tripathy, Umasankar De, Niranjan Dehury, Paltan Laha, Manas Kumar Panda, Hyung Sik Kim, Srikanta Patra
Six mononuclear Ir complexes (1-6) using polypyridyl-pyrazine based ligands (L1 and L2) and {[cp*IrCl(μ-Cl)]2 and [(ppy)2Ir(μ-Cl)]2} precursors have been synthesised and characterised. Complexes 1-5 have shown potent anticancer activity against various human cancer cell lines (MCF-7, LNCap, Ishikawa, DU145, PC3 and SKOV3) while complex 6 is found to be inactive. Flow cytometry studies have established that cellular accumulation of the complexes lies in the order 2 > 1 > 5 > 4 > 3 > 6 which is in accordance with their observed cytotoxicity...
September 27, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27646031/autoregulated-expression-of-p53-from-an-adenoviral-vector-confers-superior-tumor-inhibition-in-a-model-of-prostate-carcinoma-gene-therapy
#20
COMPARATIVE STUDY
Rodrigo Esaki Tamura, Rafael Bento da Silva Soares, Eugenia Costanzi-Strauss, Bryan E Strauss
Alternative treatments for cancer using gene therapy approaches have shown promising results and some have even reached the marketplace. Even so, additional improvements are needed, such as employing a strategically chosen promoter to drive expression of the transgene in the target cell. Previously, we described viral vectors where high-level transgene expression was achieved using a p53-responsive promoter. Here we present an adenoviral vector (AdPGp53) where p53 is employed to regulate its own expression and which outperforms a traditional vector when tested in a model of gene therapy for prostate cancer...
December 2016: Cancer Biology & Therapy
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