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https://www.readbyqxmd.com/read/28810530/caspase-dependent-and-caspase-independent-induction-of-apoptosis-in-breast-cancer-by-fucoidan-via-the-pi3k-akt-gsk3%C3%AE-pathway-in-vivo-and-in-vitro
#1
Meilan Xue, Xinqiang Ji, Chuanxing Xue, Hui Liang, Yinlin Ge, Xinjia He, Li Zhang, Kang Bian, Lichen Zhang
Purpose Fucoidan, a complex, sulfated polysaccharide obtained from brown seaweed, exerted anticancer activity through the down-regulation of β-catenin signaling in mouse breast cancer cells in our previous study. This study examines the anti-cancer effects of fucoidan as well as its underlying molecular mechanisms in the human triple negative breast cancer (TNBC) cell line and in 7,12-dimethylbenz[a]anthracene (DMBA)-induced experimental mammary carcinogenesis in rats. Methods in vitro studies, fluorescent staining, flow cytometry and Western blotting were performed to analyze apoptosis and protein expression in human breast cancer MDA-MB-231 cells...
August 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28807839/characterization-of-fm2382-from-fulvimarina-manganoxydans-sp-nov-8047-with-potential-enzymatic-decontamination-of-sulfur-mustard
#2
Yuan-Zhong Zhao, Xuan Guo, Jin-Yi Zhong, Nan Guo, Lin-Cai Chen, Zhi-Yang Dong
Sulfur mustard (SM) can be hydrolyzed by haloalkane dehalogenases such as DhaA, LinB and DmbA. However, the low resistance to the elevated temperatures limited the practical application of haloalkane dehalogenases. Here we reported a new thermotolerant dehalogenase FM2382 from Fulvimarina manganoxydans sp. nov. 8047. The specific activity of FM2382 to SM is 0.6 U/mg. FM2382 possessed high heat stability (45 °C) in slight alkali environment (pH 7.5) and retained approximately 50% activity after incubation at 70 °C for 40 min...
August 11, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28801714/parthenolide-attenuates-7-12-dimethylbenz-a-anthracene-induced-hamster-buccal-pouch-carcinogenesis
#3
Nagarethinam Baskaran, Govindan Sadasivam Selvam, Subramani Yuvaraj, Albert Abhishek
Over the decades, the survival rates for oral cancer have not improved despite development in novel diagnostic and therapeutic strategies. Therefore, the present study is aimed at investigating the chemopreventive potential of parthenolide in DMBA-induced hamster buccal pouch carcinogenesis. The hamsters were divided into 4 groups (n = 6/group). Group I was treated as control. Groups II and III were painted with a solution of 0.5% DMBA three times per week for 14 weeks on the left buccal pouches. In addition, group III were orally administrated with parthenolide 2 mg/kg b...
August 12, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28795467/cenp-r-acts-bilaterally-as-a-tumor-suppressor-and-an-oncogene-in-the-two-stage-skin-carcinogenesis-model
#4
Kazuhiro Okumura, Naoko Kagawa, Megumi Saito, Yasuhiro Yoshizawa, Haruka Munakata, Eriko Isogai, Tatsuo Fukagawa, Yuichi Wakabayashi
CENP-R is a component of the CENP-O complex, including CENP-O, CENP-P, CENP-Q, CENP-R, and CENP-U and is constitutively localized to kinetochores throughout the cell cycle in vertebrates. CENP-R deficient chicken DT40 cells are viable and show very minor effect on mitosis. To investigate the functional roles of CENP-R in vivo, we generated CENP-R deficient mice (Cenp-r(-/-) ). Mice heterozygous or homozygous for Cenp-r null mutation are viable and healthy, with no apparent defect in growth and morphology, indicating Cenp-r is not essential for normal development...
August 9, 2017: Cancer Science
https://www.readbyqxmd.com/read/28780867/electroanalysis-of-neutral-precursors-in-protic-ionic-liquids-and-synthesis-of-high-ionicity-ionic-liquids
#5
Sean E Goodwin, Daniel E Smith, Joshua S Gibson, Robert G Jones, Darren A Walsh
Protic ionic liquids (PILs) are ionic liquids that are formed by transferring protons from Brønsted acids to Brønsted bases. While they nominally consist entirely of ions, PILs can often behave as though they contain a significant amount of neutral species (either molecules or ion clusters), and there is currently a lot of interest in determining the degree of "ionicity" of PILs. In this contribution, we describe a simple electroanalytical method for detecting and quantifying residual excess acids in a series of ammonium-based PILs (diethylmethylammonium triflate [dema][TfO], dimethylethylammonium triflate [dmea][TfO], triethylammonium trifluoroacetate [tea][TfAc], and dimethylbutylammonium triflate [dmba][TfO])...
August 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28739686/chemoprevention-by-quercetin-of-oral-squamous-cell-carcinoma-by-suppression-of-the-nf-%C3%AE%C2%BAb-signaling-pathway-in-dmba-treated-hamsters
#6
Wen Zhang, Gang Yin, Jianguo Dai, Y U Sun, Robert M Hoffman, Zhijian Yang, Yuan Fan
BACKGROUND/AIM: The aim of this study was to investigate the effects of the flavonoid quercetin on chemoprevention of oral squamous cell carcinoma (OSCC). The study involved molecular signaling pathways in 7,12-dimethylbenz(a) anthracene (DMBA)-induced hamster buccal pouch (HBP) carcinogenesis. MATERIALS AND METHODS: DMBA (0.5%) was painted at the right buccal pouches of hamsters for 14 weeks to induce carcinoma. DMBA-treated hamsters received simultaneous doses of quercetin...
August 2017: Anticancer Research
https://www.readbyqxmd.com/read/28724908/design-and-discovery-of-novel-monastrol-1-3-5-triazines-as-potent-anti-breast-cancer-agent-via-attenuating-epidermal-growth-factor-receptor-tyrosine-kinase
#7
Jitendra Kumar Srivastava, Girinath G Pillai, Hans Raj Bhat, Amita Verma, Udaya Pratap Singh
A novel series of hybrid analogues of monastrol-1,3,5-triazine were designed and developed via one-pot synthesis using Bi(NO3)3 as a catalyst. Entire compounds were evaluated for their anticancer activity against HeLa (cervical cancer), MCF-7 (breast cancer), HL-60 (Human promyelocytic leukemia), HepG2 (Hepatocellular carcinoma) and MCF 12A (normal epithelial breast cell line) using MTT assay, where they showed highest inhibitory activity against MCF-7. The molecules were also found to be non-toxic to MCF 12A cells...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28709970/selective-effects-of-whey-protein-concentrate-on-glutathione-levels-and-apoptosis-in-rats-with-mammary-tumors
#8
Shih-Hsuan Cheng, Yang-Ming Tseng, Szu-Hsien Wu, Shih-Meng Tsai, Li-Yu Tsai
Glutathione (GSH) plays an important role in antioxidant defense and regulation of apoptosis. GSH deficiency is related to many diseases, including cancer, and increased GSH levels in cancer cells are associated with chemotherapy resistance because of resistance to apoptosis. In this study, we investigated the effects of whey protein concentrate (WPC), a precursor of GSH, in rats with mammary tumors induced by treatment with 7,12-dimethylbenz(a)anthracene (DMBA). DMBA treatment results in cellular changes that mimic the initiation and promotion of carcinogenesis of breast tissue...
September 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28704522/assessment-of-gut-microbiota-populations-in-lean-and-obese-zucker-rats
#9
Reza Hakkak, Soheila Korourian, Steven L Foley, Bruce D Erickson
Obesity has been on the rise in the US and worldwide for the last several decades. Obesity has been associated with chronic disease development, such as certain types of cancer, type 2 diabetes, cardiovascular disease, and liver diseases. Previously, we reported that obesity promotes DMBA-induced mammary tumor development using the obese Zucker rat model. The intestinal microbiota is composed of a diverse population of obligate and facultative anaerobic microorganisms, and these organisms carry out a broad range of metabolic activities...
2017: PloS One
https://www.readbyqxmd.com/read/28677822/spectroscopic-characterization-of-oral-epithelial-dysplasia-and-squamous-cell-carcinoma-using-multiphoton-autofluorescence-micro-spectroscopy
#10
Rahul Pal, Kert Edward, Liang Ma, Suimin Qiu, Gracie Vargas
OBJECTIVE: Multiphoton autofluorescence microscopy (MPAM) has shown potential in identifying features that are directly related to tissue microstructural and biochemical changes throughout epithelial neoplasia. In this study, we evaluate the autofluorescence spectral characteristics of neoplastic epithelium in dysplasia and oral squamous cell carcinoma (OSCC) using multiphoton autofluorescence spectroscopy (MPAS) in an in vivo hamster model of oral neoplasia in order to identify unique signatures that could be used to delineate normal oral mucosa from neoplasia...
July 5, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28671029/chemopreventive-effect-of-syringic-acid-on-7-12-dimethylbenz-a-anthracene-induced-hamster-buccal-pouch-carcinogenesis
#11
Velu Periyannan, Veerasamy Vinothkumar, Sukumar Babukumar, Ramachandhiran Duraisamy
Oral squamous cell carcinoma is most prevalent and refractory cancers worldwide. Recently chemoprevention could be a promising approach in developing countries. The present study investigates the mechanism of syringic acid (SA), a phenolic constituent of plant Alpiniacalcarata Roscoe the leaves used, traditional Indian Ayurveda medicines, mediated chemoprevention on 7,12-dimethylbenz(a)anthracene (DMBA) induced hamster buccal pouch carcinogenesis (HBPC). Lipid peroxidation and antioxidants were measured in the plasma and buccal tissues in experimental hamsters...
July 3, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28620301/chemopreventive-activity-of-honokiol-against-7-12-dimethylbenz-a-anthracene-induced-mammary-cancer-in-female-sprague-dawley-rats
#12
Zhenyu Wang, Xingyi Zhang
Breast cancer is a predominant cause of death in women across the globe. Chemoprevention by using natural, dietary or synthetic products has been appearing to be a fascinating approach to combat the growing burden of breast cancer. In the current study, we intended to explore the mechanisms of chemopreventive action of honokiol against 7, 12 - dimethylbenz[a]anthracene (DMBA)-induced mammary cancer in female Sprague Dawlely (SD) rats. We induced mammary cancer in SD rats by administering single dose of DMBA (80 mg/kg) through intra gastric route...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28612431/phlorotannin-composition-of-laminaria-digitata
#13
Anne M Vissers, Augusta Caligiani, Stefano Sforza, Jean-Paul Vincken, Harry Gruppen
INTRODUCTION: Phlorotannins are complex mixtures of phloroglucinol oligomers connected via C-C (fucols) or C-O-C (phlorethols) linkages. Their uniformity in subunits and large molecular weight hamper their structural analysis. Despite its commercial relevance for alginate extraction, phlorotannins in Laminaria digitata have not been studied. OBJECTIVE: To obtain quantitative and structural information on phlorotannins in a methanolic extract from L. digitata. METHODOLOGY: The combined use of (13) C and (1) H NMR spectroscopy allowed characterisation of linkage types and extract purity...
June 13, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28610421/electro-acupuncture-therapy-increases-serum-interferon-%C3%AE-levels-in-rats-with-7-12-dimethylbenz-%C3%AE-anthracene-dmba-induced-breast-tumors
#14
Laily Yuliatun, Sholihatul Amalia, Aliyah Adek Rahma, Laily Aflahal Yaumi
Objective: To determine the effect of electro-acupuncture (EA) treatment on serum levels of interferon-γ (IFN-γ) in rats with 7,12-dimethylbenz(α)anthracene (DMBA)-induced breast tumors. Methods: Twenty five female Wistar rats were divided randomly into 5 groups: normal group (N; neither DMBA-induced nor treated with EA); control group (C; DMBA-induced only); EA 3 days : (DMBA-induced + EA for 3 days); EA 5 days: (DMBA-induced + EA for 5 days); EA 10 days: (DMBA-induced + EA for 10 days) group. Animals were acclimatized from day 1 to day 7...
May 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28596382/a-new-long-noncoding-rna-lncrna-is-induced-in-cutaneous-squamous-cell-carcinoma-and-down-regulates-several-anticancer-and-cell-differentiation-genes-in-mouse
#15
Gilles Ponzio, Roger Rezzonico, Isabelle Bourget, Richard Allan, Nicolas Nottet, Alexandra Popa, Virginie Magnone, Géraldine Rios, Bernard Mari, Pascal Barbry
Keratinocyte-derived cutaneous squamous cell carcinoma (cSCC) is the most common metastatic skin cancer. Although some of the early events involved in this pathology have been identified, the subsequent steps leading to tumor development are poorly defined. We demonstrate here that the development of mouse tumors induced by the concomitant application of a carcinogen and a tumor promoter (7,12-dimethylbenz[a]anthracene (DMBA) and 12-O-tetradecanoylphorbol-13-acetate (TPA), respectively) is associated with the up-regulation of a previously uncharacterized long noncoding RNA (lncRNA), termed AK144841...
July 28, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28594380/effects-of-obesity-on-pro-oxidative-conditions-and-dna-damage-in-liver-of-dmba-induced-mammary-carcinogenesis-models
#16
Stepan Melnyk, Soheila Korourian, Joseph W Levy, Oleksandra Pavliv, Teresa Evans, Reza Hakkak
The prevalence of the overweight and obesity is on the rise worldwide. Obesity can increase the risk of certain cancers and liver steatosis development. Previously, we reported that obesity increased liver steatosis in a mammary tumor model, but little is known about the effects of obesity in the liver in regard to global DNA methylation, DNA damage, and oxidative/nitrosative stress. Using a mammary tumor model, we investigated the effects of obesity on oxidative stress and DNA reaction. Five-week-old lean and obese female rats were used...
June 8, 2017: Metabolites
https://www.readbyqxmd.com/read/28585088/allyl-isothiocyanate-a-potent-chemopreventive-agent-targets-ahr-nrf2-signaling-pathway-in-chemically-induced-mammary-carcinogenesis
#17
Thangarasu Rajakumar, Pachaiappan Pugalendhi, Subbaiyan Thilagavathi, Dhanabalan Ananthakrishnan, Krishnaswamy Gunasekaran
In the present study, we investigated the effect of allyl isothiocyanate (AITC) on liver detoxification signaling pathway in 7,12-dimethylbenz(a)anthracene (DMBA)-induced mammary carcinogenesis. Mammary tumor was induced by a single dose of DMBA (25 mg/rat) injected subcutaneously near the mammary gland in Sprague-Dawley rats. DMBA-alone-treated rats show an increased synthesis of phase I detoxification enzymes, lipid peroxidative markers, liver marker enzymes, and lipid profiles whereas, depletion of phase II detoxification enzymes and antioxidants in rat liver tissues...
June 5, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28582759/%C3%AE-mangostin-inhibits-dmba-tpa-induced-skin-cancer-through-inhibiting-inflammation-and-promoting-autophagy-and-apoptosis-by-regulating-pi3k-akt-mtor-signaling-pathway-in-mice
#18
Fei Wang, Hongxia Ma, Zhaoguo Liu, Wei Huang, Xiaojing Xu, Xuemei Zhang
Skin cancer is the most common form of cancer responsible for considerable morbidity and mortality, the treatment progress of which remains slow though. Therefore, studies identifying anti-skin cancer agents that are innocuous are urgently needed. α-Mangostin, a natural product isolated from the pericarp of mangosteen fruit, has potent anti-cancer activity. However, its role in skin cancer remains unclear. The aim of this study was to evaluate the treatment effect of α-mangostin on skin tumorigenesis induced by 9,10-dimethylbenz[a]anthracene (DMBA)/TPA in mice and the potential mechanism...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28575166/lta4h-regulates-cell-cycle-and-skin-carcinogenesis
#19
Naomi Oi, Hiroyuki Yamamoto, Alyssa Langfald, Ruihua Bai, Mee-Hyun Lee, Ann M Bode, Zigang Dong
Leukotriene A4 hydrolase (LTA4H), a bifunctional zinc metallo-enzyme, is reportedly overexpressed in several human cancers. Our group has focused on LTA4H as a potential target for cancer prevention and/or therapy. In the present study, we report that LTA4H is a key regulator of cell cycle at the G0/G1 phase acting by negatively regulating p27 expression in skin cancer. We found that LTA4H is overexpressed in human skin cancer tissue. Knocking out LTA4H significantly reduced skin cancer development in the 7,12-dimethylbenz(a)anthracene (DMBA)-initiated/12-O-tetradecanoylphorbol-13-acetate (TPA)-promoted two-stage skin cancer mouse model...
May 31, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28573225/emodin-downregulates-cell-proliferation-markers-during-dmba-induced-oral-carcinogenesis-in-golden-syrian-hamsters
#20
Asokan Manimaran, Rajamanickam Buddhan, Shanmugam Manoharan
BACKGROUND: Cell-cycle disruption is the major characteristic features of neoplastic transformation and the status of cell-cycle regulators can thus be utilized to assess the prognostic significance in patients with cancer. The PCNA, cyclin D1, CDK4, CDK6 and survivin expression in the buccal mucosa was utilized to evaluate the Emodin efficacy on abnormal cell proliferation during 7,12-dimethylbenz(a)anthracene (DMBA) induced oral carcinogenesis in golden Syrian hamsters. MATERIALS AND METHODS: Topical application of DMBA, three times a week for 14 weeks, on the hamsters' buccal pouches developed well differentiated squamous cell carcinoma...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
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