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https://www.readbyqxmd.com/read/29139009/lfm-a13-a-potent-inhibitor-of-polo-like-kinase-inhibits-breast-carcinogenesis-by-suppressing-proliferation-activity-and-inducing-apoptosis-in-breast-tumors-of-mice
#1
Kazim Sahin, Mehmet Tuzcu, Mehmet Yabas, Cemal Orhan, Nurhan Sahin, Ibrahim H Ozercan
The goals of the present study were to define the anticancer activity of LFM-A13 (α-cyano-β-hydroxy-β-methyl-N-(2,5-dibromophenyl)-propenamide), a potent inhibitor of Polo-like kinase (PLK), in a mouse mammary cancer model induced by 7,12-dimethylbenz(a)anthracene (DMBA) in vivo and explore its anticancer mechanism(s). We also examined whether the inhibition of PLK by LFM-A13 would improve the efficiency of paclitaxel in breast cancer growth in vivo. To do this, female BALB/c mice received 1 mg of DMBA once a week for 6 weeks with oral gavage...
November 15, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/29115866/four-experimental-stimulants-found-in-sports-and-weight-loss-supplements-2-amino-6-methylheptane-octodrine-1-4-dimethylamylamine-1-4-dmaa-1-3-dimethylamylamine-1-3-dmaa-and-1-3-dimethylbutylamine-1-3-dmba
#2
Pieter A Cohen, John C Travis, Peter H J Keizers, Patricia Deuster, Bastiaan J Venhuis
BACKGROUND: The United States Food and Drug Administration banned the stimulant 1,3-dimethylamylamine (1,3-DMAA) from dietary supplements and warned consumers that the stimulant can pose cardiovascular risks ranging from high blood pressure to heart attacks. OBJECTIVES: We designed our study to determine if a new stimulant similar in structure to 1,3-DMAA has been introduced as an ingredient in supplements sold in the United States (US). METHODS: We analyzed six brands of supplements that listed an ingredient on the label (e...
November 8, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/29094744/oral-administration-of-lyophilized-dunaliella-salina-a-carotenoid-rich-marine-alga-reduces-tumor-progression-in-mammary-cancer-induced-rats
#3
Ramachandran Srinivasan, Amballa Chaitanyakumar, Anbazhagan Mageswari, Ajitha Gomathi, J G S Pavan Kumar, Mathiyazhagan Jayasindu, Gunasekaran Bharath, Jagannathan Sampathkumar Shravan, K M Gothandam
Dunaliella salina is a photosynthetic cell factory used for the commercial production of food additives, cattle stock feed and cosmetics as well as active ingredients for pharmaceutical industries. The investigation of the in vivo antitumor activity of D. salina lyophilized powder (DSLP) against 7,12-dimethylbenz(a)anthracene (DMBA) induced mammary carcinogenesis in female Wistar rats indicated a dose-dependent effect of DSLP. We studied the effect of DSLP at two different dosages of 500 and 1000 mg per kg bw on DMBA induced mammary cancer in rats by measuring the status of antioxidant enzymes, phase I and phase II detoxification enzymes, lipid peroxidation, and glycoconjugated proteins and by investigating the expression pattern of cell proliferation (Ki-67), hormonal receptor (ER, PR and HER2) status by immunohistochemical analysis, and apoptotic (caspase-3 and -9) and pro-inflammatory (COX-2) markers by colorimetric analysis...
November 2, 2017: Food & Function
https://www.readbyqxmd.com/read/29057661/the-effect-of-zinc-and-melatonin-supplementation-on-immunity-parameters-in-breast-cancer-induced-by-dmba-in-rats
#4
Saltuk Bugra Baltaci, Rasim Mogulkoc, Abdulkerim Kasim Baltaci, Ayca Emsen, Hasibe Artac
OBJECTIVE: The aim of the study was to determine the effects of zinc and melatonin supplements on the immunity parameters of female rats with breast cancer induced by DMBA. METHODS: Group 1; Control, Group 2; 7,12-dimethylbenz[a]anthracene (DMBA), Group 3; DMBA + zinc, Group 4; DMBA + melatonin, Group 5; DMBA + zinc + melatonin. The rats' breast cancer was induced by DMBA 80 mg/kg. Groups 3-5 received daily 5 mg/kg doses of zinc, melatonin, and zinc + melatonin, respectively...
October 23, 2017: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29043842/the-protective-and-immunomodulatory-effects-of-fucoidan-against-7-12-dimethyl-benz-a-anthracene-induced-experimental-mammary-carcinogenesis-through-the-pd1-pdl1-signaling-pathway-in-rats
#5
Meilan Xue, Hui Liang, Qingjuan Tang, Chuanxing Xue, Xinjia He, Li Zhang, Zheng Zhang, Zhengyan Liang, Kang Bian, Lichen Zhang, Zhuxin Li
Fucoidan is a sulfated polysaccharide that is extracted from brown algae seaweed. This study was designed to evaluate the protective and immunomodulatory effects of dietary fucoidan on 7,12-dimethyl benz[a]anthracene (DMBA)-induced experimental mammary carcinogenesis in rats. Sixty Sprague-Dawley rats were randomly assigned to four equal groups: the control group (control group), the cancer model group (model group), and the F1 and F2 groups, which were fed fucoidan at concentrations of 200 and 400 mg/kg·body weight, respectively...
October 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29042292/obesity-enhances-carcinogen-7-12-dimethylbenz-a-anthracene-induced-tumorigenesis-in-vitro-and-in-vivo
#6
Chia-Chien Hsieh, Shih-Han Peng, Mei-Jia Chou
Growing body of evidence shows that extra adiposity influences on the progression of multiple cancers, including breast cancer. The aim of this study is to investigate whether obesity correlates with mammary tumor development in vitro and in vivo. We found that obesity-related mediators, 3T3-L1 adipocyte conditioned medium, enhanced formation of cancerous foci induced by the carcinogen 7,12-Dimethylbenz[a]anthracene (DMBA) in NIH/3T3 fibroblasts, in vitro. Additionally, we tested the effect of obesity in mouse model of DMBA-induced breast cancer...
October 16, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29031386/impact-of-conjugated-linoleic-acid-administered-to-rats-prior-and-after-carcinogenic-agent-on-arachidonic-and-linoleic-acid-metabolites-in-serum-and-tumors
#7
Małgorzata Jelińska, Agnieszka Białek, Iwona Gielecińska, Hanna Mojska, Andrzej Tokarz
The objective of the study was to assess the influence of conjugated linoleic acid (CLA) daily supplementation prior and after carcinogenic agent on the concentrations of eicosanoids - metabolites of arachidonic acid (15-, 12- or 5-hydroxyeicosatetraenoic acids (15-, 12-, 5-HETE), prostaglandin E2 (PGE2)) and linoleic acid (13- or 9-hydroxyoctadecadienoic acids (13-, 9-HODE)) in rat serum and 7,12-dimethylbenz[a]anthracene (DMBA)-induced tumors. Female rats were randomised into six groups, receiving 1% or 2% Bio-C...
November 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29024822/pubertally-initiated-high-fat-diet-promotes-mammary-tumorigenesis-in-obesity-prone-fvb-mice-similarly-to-obesity-resistant-balb-c-mice
#8
Yirong Zhu, Mark D Aupperlee, Sandra Z Haslam, Richard C Schwartz
Premenopausal breast cancer is associated with increased animal fat consumption among normal-weight but not overweight women. Our previous findings in obesity-resistant BALB/c mice showed that a diet high in saturated animal fat (HFD) promotes mammary tumorigenesis in both DMBA carcinogenesis and Trp53-null transplant models. Having made these observations in BALB/c mice, which have very modest HFD weight gain, we determined the effects of HFD in FVB mice, which gain significant weight on HFD. Three-week-old FVB mice fed a low-fat diet or HFD were subjected to 7,12-dimethylbenz[a]anthracene-induced carcinogenesis...
December 2017: Translational Oncology
https://www.readbyqxmd.com/read/29021136/distinct-angiogenic-changes-during-carcinogenesis-defined-by-novel-label-free-dark-field-imaging-in-a-hamster-cheek-pouch-model
#9
Fangyao Hu, Hannah Martin, Amy Frees Martinez, Jeffrey Everitt, Alaattin Erkanli, Walter T Lee, Mark W Dewhirst, Nirmala Ramanujam
There remain gaps in knowledge concerning how vascular morphology evolves during carcinogenesis. In this study, we imaged neovascularization by label-free dark field microscopy of a DMBA-induced hamster cheek pouch model of oral squamous cell carcinoma (SCC). Wavelength-dependent imaging revealed distinct vascular features at different imaging depths and vessel sizes. Vascular tortuosity increased significantly in high-risk lesions, while diameter decreased significantly in hyperplastic and SCC lesions. Large vessels preserved the same trends seen in the original images, whereas small vessels displayed different trends, with length and diameter increasing during carcinogenesis...
October 11, 2017: Cancer Research
https://www.readbyqxmd.com/read/29016221/apoptotic-and-immunosuppressive-effects-of-turmeric-paste-on-7-12-di-methyl-benz-a-anthracene-induced-skin-tumor-model-of-wistar-rat
#10
R S Rajmani, Prafull Singh, Lakshya Veer Singh
Dietary components with potent anticancerous property are gaining attention as therapeutic agents due to low cost of therapy and minimal toxic effects. Turmeric is one such miracle spices of Indian and South Asian recipes with multiple medicinal properties. The anticarcinogenic properties of its active compound curcumin have been studied in detail. However, studies on the medicinal properties of crude turmeric used as dietary agents are lacking. Therefore, in this study we investigated the effects of dietary and topical crude turmeric paste on DMBA induced skin tumor of male Wistar rats...
October 10, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28992327/the-steady-state-level-of-cdk4-protein-is-regulated-by-antagonistic-actions-between-paqr4-and-skp2-and-involved-in-tumorigenesis
#11
Lin Wang, Rui Zhang, Xue You, Huanhuan Zhang, Siying Wei, Tingting Cheng, Qianqian Cao, Zhenzhen Wang, Yan Chen
CDK4 is crucial for G1-to-S transition of cell cycle. It is well established that ubiquitin-mediated degradations of CDK inhibitors and cyclins are pivotal for the timely and unidirectional progression of cell cycle. However, how CDK4 itself is modulated by ubiquitin-mediated degradation has been elusive. Here we report that the steady-state level of CDK4 is controlled by PAQR4, a member of the progestin and adipoQ receptor family, and SKP2, an E3 ubiquitin ligase. Knockdown of PAQR4 leads to reduction of cell proliferation, accompanied by reduced protein level of CDK4...
September 12, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28987722/the-effects-of-%C3%AF-6-and-%C3%AF-3-fatty-acids-on-early-stages-of-mice-dmba-submandibular-glands-tumorigenesis
#12
M E Scherma, G Madzzuduli, R A Silva, M I Garay, G Repossi, M Brunotto, M E Pasqualini
The aim of this work was: to assess the impact of diets enriched in polyunsaturated fatty acids ω-3 and ω-6 families on the lipid profile of cell membrane and their effect on cycle regulation and apoptosis, evaluated by TP53 and Ki-67 expression in 9,10-dimethyl-1,2-benzanthracene (DMBA) induced tumor development in submandibular glands (SMG) in murine models. To generate tumorigenic changes, SMG mice in the experimental group were injected with 50μl of 0.5% of DMBA. Both control (no DMBA) and experimental groups of BALB/c mice were fed with: chia oil (ChO), rich in ω-3 fatty acid; corn oil (CO), rich in ω-6/ω-3 fatty acid; and safflower (SO) oil, rich in ω-6fatty acid...
October 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28976135/poly-mva-attenuates-7-12-dimethylbenz-a-anthracene-initiated-and-croton-oil-promoted-skin-papilloma-formation-on-mice-skin
#13
Ravindran K Veena, Thekkuttuparambil A Ajith, Kainoor K Janardhanan, Francis Antonawich
Chemopreventive agents which exhibit activities such as anti-inflammation, inhibition of carcinogen induced mutagenesis and scavenging of free radical might play a decisive role in the inhibition of chemical carcinogenesis either at the initiation or promotion stage. Many synthesized palladium (Pd) complexes tested experimentally for antitumor activity are found effective. Poly-MVA is a liquid blend preparation containing B complex vitamins, ruthenium with Pd complexed with alpha lipoic acid as the major ingredients...
September 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/28955794/effects-of-aqueous-cinnamon-extract-on-chemically-induced-carcinoma-of-hamster-cheek-pouch-mucosa
#14
Samah K Ezzat, Mazen T AbuElkhair, Mohamed I Mourad, Mohamed E Helal, Mohammed E Grawish
This study aimed to investigate the effects of aqueous cinnamon extract (ACE) on 7, 12-Dimethylbenz[a]anthracene (DMBA)-induced oral carcinogenesis in hamster cheek pouch (HCP) mucosa. Sixty male Syrian hamsters were randomly divided into six equal groups. The hamsters of groups I, II and III received no treatment, DMBA and ACE respectively, for 16 weeks. Groups IV and V were handled as group II and concomitantly treated with ACE for the same period and additionally group V received ACE for other 16 weeks after the stoppage of DMBA application...
December 2017: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28950890/the-value-of-dce-mri-in-assessing-histopathological-and-molecular-biological-features-in-induced-rat-epithelial-ovarian-carcinomas
#15
Su Juan Yuan, Tian Kui Qiao, Jin Wei Qiang, Song Qi Cai, Ruo Kun Li
BACKGROUND: To investigate dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for assessing histopathological and molecular biological features in induced rat epithelial ovarian carcinomas (EOCs). METHODS: 7,12-dimethylbenz[A]anthracene (DMBA) was applied to induce EOCs in situ in 46 SD rats. Conventional MRI and DCE-MRI were performed to evaluate the morphology and perfusion features of the tumors, including the time-signal intensity curve (TIC), volume transfer constant (K(trans)), rate constant (Kep), extravascular extracellular space volume ratio (Ve) and initial area under the curve (IAUC)...
September 26, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28914439/dampness-heat-accelerates-dmba-induced-mammary-tumors-in-rats
#16
Wei Dong, Xi-Lan Tang, Guang-Bin Shang, Guo-Liang Xu, Wei-Feng Zhu, Hong-Ning Liu
OBJECTIVE: To investigate the impact of dampness-heat (DH) on the development of mammary tumors in 7,12-dimethylbenz(a)anthracene (DMBA)-induced rats. METHODS: Forty rats were randomly divided into 3 groups in a randomized block design, including the control group (n=13), DMBA group (n=14), and DMBA plus DH group (n=13). Rats in the DMBA group and DMBA plus DH group were intragastrically administrated with DMBA (100 mg/kg) for twice, once per week, while rats in the control group were treated with equivalent volumes of sesame oil...
September 15, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28904060/early-exposure-to-a-high-fat-high-sugar-diet-increases-the-mammary-stem-cell-compartment-and-mammary-tumor-risk-in-female-mice
#17
Isabel U Lambertz, Linjie Luo, Thomas R Berton, Scott L Schwartz, Stephen D Hursting, Claudio J Conti, Robin Fuchs-Young
Obesity and alterations in metabolic programming from early diet exposures can affect the propensity to disease in later life. Through dietary manipulation, developing mouse pups were exposed to a hyperinsulinemic, hyperglycemic milieu during three developmental phases: gestation, lactation, and postweaning. Analyses showed that a postweaning high fat/high sugar (HF/HS) diet had the main negative effect on adult body weight, glucose tolerance, and insulin resistance. However, dimethylbenz[a]anthracene (DMBA)-induced carcinogenesis revealed that animals born to a mother fed a HF/HS gestation diet, nursed by a mother on a mildly diet-restricted, low fat/low sugar diet (DR) and weaned onto a HF/HS diet (HF/DR/HF) had the highest mammary tumor incidence, while HF/HF/DR had the lowest tumor incidence...
October 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/28893047/an-intervention-airing-the-effect-of-iranian-propolis-on-epithelial-dysplasia-of-the-tongue-a-preliminary-study
#18
Maedeh Salehi, Mina Motallebnejad, Ali Akbar Moghadamnia, Maryam Seyemajidi, Simin Noori Khanghah, Alireza Ebrahimpour, Tahereh Molania
INTRODUCTION: Since oral cancer is one of the causes of mortality, the use of materials or methods that can reduce cancer or prevent its progression has particular importance. AIM: Aim of the study was to evaluate the antitumor effects of Iranian propolis on dysplastic changes of oral mucosa in rats. MATERIALS AND METHODS: This study was performed on 28 Wistar male rats (aged 7-11 weeks, 160±20 g). They were divided into four groups of seven rats...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28887922/gramine-inhibits-angiogenesis-and-induces-apoptosis-via-modulation-of-tgf-%C3%AE-signalling-in-7-12-dimethylbenz-a-anthracene-dmba-induced-hamster-buccal-pouch-carcinoma
#19
Arunkumar Ramu, Suresh Kathiresan, Bakrudeen Ali Ahmed
BACKGROUND: Transforming growth factor-β (TGF-β) and its receptors are considered as a novel target in cancer chemotherapy. Gramine, an indole alkaloid, possesses various pharmacological properties including antiproliferative and anticancer. However, the anti-angiogenic property remains unexplored. PURPOSE: The present study was designed to evaluate the anti-angiogenic and apoptosis induction properties of gramine through inhibiting TGF-β on DMBA induced oral squamous cell carcinoma (OSCC) in the hamster buccal pouch (HBP)...
September 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28872682/%C3%AE-2-himachalen-6-ol-protects-against-skin-cancer-development-in%C3%A2-vitro-and-in%C3%A2-vivo
#20
Hamid E Daaboul, Costantine F Daher, Robin I Taleb, Joelle Boulos, Kikki Bodman-Smith, Petra Boukamp, Wassim N Shebaby, Carol Dagher, Mirvat El-Sibai, Mohamad A Mroueh
BACKGROUND: Previous studies in our laboratory showed that Daucus carota oil extract (DCOE) possesses remarkable in-vitro anticancer activity and antitumour promoting effect against DMBA/TPA skin carcinogenesis in mice. Chemical analysis of DCOE led to the isolation of the β-2-himachalen-6-ol (HC), major sesquiterpene with a potent anticancer activity against various colon, breast, brain and skin cancer cells. This study investigated the anticancer activity of HC against invasive epidermal squamous cell carcinoma cells and evaluated its effect in a DMBA/TPA skin carcinogenesis Balb/c murine model...
September 5, 2017: Journal of Pharmacy and Pharmacology
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