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Cancer chemoprevention

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https://www.readbyqxmd.com/read/28521469/licochalcone-e-induces-caspase-dependent-death-of-human-pharyngeal-squamous-carcinoma-cells-through-the-extrinsic-and-intrinsic-apoptotic-signaling-pathways
#1
Sang-Joun Yu, In-A Cho, Kyeong-Rok Kang, Yi-Ra Jung, Seung Sik Cho, Goo Yoon, Ji-Su Oh, Jae-Seek You, Yo-Seob Seo, Gyeong-Je Lee, Sook-Young Lee, Do Kyung Kim, Chun Sung Kim, Su-Gwan Kim, Mi-Ae Jeong, Jae-Sung Kim
The aim of the present study was to investigate licochalcone-E (Lico-E)-induced apoptosis and the associated apoptotic signaling pathway in FaDu cells, a human pharyngeal squamous carcinoma cell line. Treatment with Lico-E exhibited significant cytotoxicity on FaDu cells in a concentration-dependent manner. The IC50 value of Lico-E in FaDu cells was ~50 µM. Treatment with Lico-E increased the number of dead FaDu cells. Furthermore, chromatin condensation, which is associated with apoptotic cell death, was observed in FaDu cells treated with Lico-E for 24 h...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521254/cs-peg-decorated-plga-nano-prototype-for-delivery-of-bioactive-compounds-a-novel-approach-for-induction-of-apoptosis-in-hepg2-cell-line
#2
Ahmed A Abd-Rabou, Hanaa H Ahmed
PURPOSE: Polymer-based nanoparticles are used as vectors for cancer drug delivery. The bioactive compounds (quercetin, ellagic acid and gallic acid) are well known to be not only antioxidants but also chemopreventive candidates against various types of cancers. To circumvent the low bioavailability and the short half-life time obstacles, we hypothesized a novel PLGA nano-platform functionalized with CS and PEG to encapsulate these phytochemicals. This encapsulation will protect the compounds from the phagocytic uptake and deliver PLGA-CS-PEG nano-prototype with high biodegradability and biosafety...
March 12, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28515021/sulforaphene-an-isothiocyanate-present-in-radish-plants-inhibits-proliferation-of-human-breast-cancer-cells
#3
Anna Pawlik, Marta Wała, Aleksandra Hać, Agnieszka Felczykowska, Anna Herman-Antosiewicz
BACKGROUND: Isothiocyanates derived from the Brassicaceae plants possess chemopreventive and anticancer activities. One of them is sulforaphene (SF), which is abundant in Rhapanus sativus seeds. The underlying mechanism of its anticancer activity is still underexplored. PURPOSE: SF properties make it an interesting candidate for cancer prevention and therapy. Thus, it is crucial to characterize the mechanism of its activity. STUDY DESIGN: We investigated the mechanism of antiproliferative activity of SF in breast cancer cells differing in growth factor receptors status and lacking functional p53...
June 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28511808/astaxanthin-from-shrimp-efficiently-modulates-oxidative-stress-and-allied-cell-death-progression-in-mcf-7-cells-treated-synergistically-with-%C3%AE-carotene-and-lutein-from-greens
#4
Poorigali Raghavendra-Rao Sowmya, Bangalore Prabhashankar Arathi, Kariyappa Vijay, Vallikannan Baskaran, Rangaswamy Lakshminarayana
This study investigated the synergistic efficacy of keto-carotenoid astaxanthin (AST, from shrimp) plus hydrocarbon (β-carotene, BC) and hydroxyl (lutein, L) carotenoids (from greens) on molecular events in MCF-7 cells. MCF-7 cells were treated with either of carotenoid (20 μM, AST or BC or L) separately or the mixture of them (an equimolar concentration of carotenoids mixture, CM) or saponified carotenoid extract from shrimp (SSCE) for 48 h and analyzed cellular uptake, cytotoxicity, and apoptosis. The IC50 and combination-index values of AST co-treatment with a lower concentration of BC and L (5 μM) exhibited enhanced cytotoxicity and oxidative stress as compared with individual carotenoids or SSCE...
May 13, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28501931/effect-of-allyl-isothiocyanate-on-nf-%C3%AE%C2%BAb-signaling-in-7-12-dimethylbenz-a-anthracene-and-n-methyl-n-nitrosourea-induced-mammary-carcinogenesis
#5
Thangarasu Rajakumar, Pachaiappan Pugalendhi, Rajendran Jayaganesh, Dhanabalan Ananthakrishnan, Krishnaswamy Gunasekaran
BACKGROUND: Inflammation plays a pivotal role in the process of carcinogenesis and phytochemicals have anti-inflammatory properties gaining more importance in cancer chemoprevention. The present study aimed to investigate the anti-inflammatory effect of allyl isothiocyanate (AITC) on 7,12-dimethylbenz(a)anthracene (DMBA)- and N-methyl-N-nitrosourea (MNU)-induced mammary carcinogenesis in female Sprague-Dawley rats. METHODS: RT-PCR and western blot analysis showed that inflammatory markers such as NF-κB p65, TNF-α, and IL-6 were overexpressed in mammary tumor tissues...
May 13, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28498401/luteolin-induced-apoptosis-through-activation-of-endoplasmic-reticulum-stress-sensors-in-pheochromocytoma-cells
#6
Kisang Kwon, Young-Sook Kwon, Seung-Whan Kim, Kweon Yu, Kyung-Ho Lee, O-Yu Kwon
Luteolin [2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-4-chromenone] is an active flavonoid compound from Lonicera japonica (Caprifoliaceae). Luteolin inhibits tumor cell proliferation, inflammatory and oxidative stress better, when compared with other flavonoids. In the present study, it was demonstrated that luteolin induces typical apoptosis in PC12 cells (derived from a pheochromocytoma of the rat adrenal medulla) accompanied by DNA fragmentation and formation of apoptotic bodies. In addition, luteolin regulates expression of the endoplasmic reticulum (ER) chaperone binding immunoglobulin protein, activating ER stress sensors (eukaryotic initiation factor 2α phosphorylation and X‑box binding protein 1 mRNA splicing) and induced autophagy...
May 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28498247/practice-patterns-of-hereditary-ovarian-cancer-management-in-korea
#7
Min Chul Choi, Myong Cheol Lim, Maria Lee, Min Kyu Kim, Dong Hoon Suh, Yong Jung Song, Tae-Joong Kim, Suk-Joon Chang, Jae-Weon Kim
OBJECTIVE: This study aims to evaluate practice patterns for managing hereditary ovarian cancer among Korean gynecologic oncologic physicians. METHODS: Members of the Korean Society of Gynecologic Oncology participated in the inaugural Hereditary Gynecologic Cancer Symposium or were invited to this survey by e-mail from January to February 2016. The survey was conducted using a self-administered questionnaire. RESULTS: Most physicians (66...
June 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28495234/oxidative-stress-induced-akt-downregulation-mediates-green-tea-toxicity-towards-prostate-cancer-cells
#8
Anna Maria Posadino, Hoa Thi Phu, Annalisa Cossu, Roberta Giordo, Marco Fois, Duong Thi Bich Thuan, Antonio Piga, Salvatore Sotgia, Angelo Zinellu, Ciriaco Carru, Gianfranco Pintus
Green tea consumption has been shown to possess cancer chemopreventive activity. Polyphenol E (PE) is a widely used standardized green tea extract formulation. This study was designed to investigate the impact of PE on prostate cancer cells (PC3), analyze the potential signals involved and elucidate whether anti- or pro-oxidant effects may be implicated. Treatment of PC3 cells with 30 and 100μg/ml PE significantly decreased cell viability and proliferation. At the tested concentrations, PE did not exert any antioxidant activity, eliciting instead a pro-oxidant effect at concentrations 30 and 100μg/ml, which was consistent with the observed PE cytotoxicity...
May 7, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28494451/anthocyanins-prevent-colorectal-cancer-development-in-a-mouse-model
#9
Elisabeth Lippert, Petra Ruemmele, Florian Obermeier, Stefan Goelder, Claudia Kunst, Gerhard Rogler, Nadja Dunger, Helmut Messmann, Arndt Hartmann, Esther Endlicher
BACKGROUND: Colorectal cancer is the main leading cause of cancer-related deaths worldwide. Present data suggest that plant-derived anthocyanins have anti-inflammatory and chemopreventive properties. This study was aimed at evaluating the effect of an anthocyanin-rich extract from bilberries on colorectal tumour development and growth in the administration of azoxymethan (AOM)/dextran sodium sulfate (DSS) mouse model. METHODS: Colonic carcinogenesis was induced by AOM and DSS 3 or 5%, respectively, in 50 female Balb/c mice...
May 12, 2017: Digestion
https://www.readbyqxmd.com/read/28494348/withaferin-a-inhibits-prostate-carcinogenesis-in-a-pten-deficient-mouse-model-of-prostate-cancer
#10
Jim Moselhy, Suman Suman, Mohammed Alghamdi, Balaji Chandarasekharan, Trinath P Das, Alatassi Houda, Murali Ankem, Chendil Damodaran
We recently demonstrated that AKT activation plays a role in prostate cancer progression and inhibits the pro-apoptotic function of FOXO3a and Par-4. AKT inhibition and Par-4 induction suppressed prostate cancer progression in preclinical models. Here, we investigate the chemopreventive effect of the phytonutrient Withaferin A (WA) on AKT-driven prostate tumorigenesis in a Pten conditional knockout (Pten-KO) mouse model of prostate cancer. Oral WA treatment was carried out at two different doses (3 and 5 mg/kg) and compared to vehicle over 45 weeks...
May 7, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28491112/medicinal-plants-and-natural-active-compounds-for-cancer-chemoprevention-chemotherapy
#11
EDITORIAL
Hilal Zaid, Michael Silbermann, Alaa Amash, Dan Gincel, Essam Abdel-Sattar, Nazli B Sarikahya
No abstract text is available yet for this article.
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28490739/honokiol-inhibits-ultraviolet-radiation-induced-immunosuppression-through-inhibition-of-ultraviolet-induced-inflammation-and-dna-hypermethylation-in-mouse-skin
#12
Ram Prasad, Tripti Singh, Santosh K Katiyar
Ultraviolet (UV) radiation exposure induces immunosuppression, which contributes to the development of cutaneous malignancies. We investigated the effects of honokiol, a phytochemical found in plants of the genus Magnolia, on UVB-induced immunosuppression using contact hypersensitivity (CHS) as a model in C3H/HeN mice. Topical application of honokiol (0.5 and 1.0 mg/cm(2) skin area) had a significant preventive effect on UVB-induced suppression of the CHS response. The inflammatory mediators, COX-2 and PGE2, played a key role in this effect, as indicated by honokiol inhibition of cyclooxygenase-2 (COX-2) expression and PGE2 production in the UVB-exposed skin...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28489395/identification-of-potent-and-selective-cyp1a1-inhibitors-via-combined-ligand-and-structure-based-virtual-screening-and-their-in-vitro-validation-in-sacchrosomes-and-live-human-cells
#13
Prashant Joshi, Glen J P McCann, Vinay Sonawane, Ram A Vishwakarma, Bhabatosh Chaudhuri, Sandip B Bharate
Target structure-guided virtual screening (VS) is a versatile, powerful and inexpensive alternative to experimental high-throughput screening (HTS). In order to discover potent CYP1A1 enzyme inhibitors for cancer chemoprevention, a commercially library of 50,000 small molecules was utilized for VS guided by both ligand and structure-based strategies. For experimental validation, 300 ligands were proposed based on combined analysis of fitness scores from ligand based e-pharmacophore screening and docking score, prime MMGB/SA binding affinity and interaction pattern analysis from structure-based VS...
May 10, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28487767/inducement-of-apoptosis-by-cucurbitacin-e-a-tetracyclic-triterpenes-through-death-receptor-5-in-human-cervical-cancer-cell-lines
#14
Ya-Min Cheng, Ching-Ju Shen, Chi-Chang Chang, Cheng-Yang Chou, Ching-Chou Tsai, Yi-Chiang Hsu
Cervical cancer is the most common malignancy in women, for which conization or hysterectomy are the main therapy. Curcubitacin E (Cu E) is a natural compound-based drug which from the Guadi (climbing stem of Cucumic melo L). Previously shown to be an anti-tumor as well as a potent chemopreventive agent against several types of tumors. The present study, investigated anti-proliferation and apoptosis induced by Cu E in cervical cancer cell lines (HeLa and Ca Ski). The results indicate that the cytotoxicity is associated with accumulation in apoptosis but not necrosis...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/28487731/the-value-of-caspase-3-after-the-application-of-annona-muricata-leaf-extract-in-colo-205-colorectal-cancer-cell-line
#15
Murdani Abdullah, Ari Fahrial Syam, Sofy Meilany, Bayu Laksono, Oryza Gryagus Prabu, Heri Setiyo Bekti, Lili Indrawati, Dadang Makmun
Annona muricata, commonly known as soursop, contains annonacin, acetogenin, and polyphenol which are known to have chemopreventive effects on cancer. In this study, we tend to evaluate the apoptosis-inducing effect of soursop (Annona muricata) leaf extract on the colorectal cancer cell line COLO-205 through the activities of caspase-3 which is a marker of cell apoptosis. Cell cultures were incubated with soursop leaf with a concentration of 10 μg/ml and then compared with those of the incubated positive control leucovorin 10 μg/ml and placebo as a negative control...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28476162/castanea-sativa-mill-bark-extract-exhibits-chemopreventive-properties-triggering-extrinsic-apoptotic-pathway-in-jurkat-cells
#16
Monia Lenzi, Marco Malaguti, Veronica Cocchi, Silvana Hrelia, Patrizia Hrelia
BACKGROUND: Chemoprevention represents the possibility to prevent, stop or reverse the cancerogenetic process. In this context the interest towards natural extracts and botanical drugs has constantly grown due to their phytochemical content. Castanea sativa Mill. (CSM) extracts showed to exert positive effect in the prevention/counteraction of chronic/degenerative diseases, therefore, we evaluated the potential chemopreventive effect of CSM bark extract. METHODS: Flow cytometry (FCM) analyses of Jurkat cells treated with CSM bark extract (0-500 μg·mL(-1)) for 24-72 h allowed evaluating its cytotoxicity and ability to induce apoptosis through the intrinsic or extrinsic pathways...
May 5, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28475382/dysplasia-and-colorectal-cancer-surveillance-in-inflammatory-bowel-disease
#17
Samba Siva Reddy Pulusu, Ian C Lawrance
Inflammatory bowel disease (IBD) patients are at an increased risk of developing colorectal cancer (CRC), a devastating complication of which intestinal dysplasia is the precursor. Considerable progress has been made to determine CRC risk in IBD, identification & management of dysplasia and preventative methods. Traditionally, surveillance colonoscopies with random colonic biopsies was used. However recent data suggests that chromoendoscopy is a better method of surveillance. Using 5-aminosalicylic acid agents primarily for chemoprevention is an ongoing debate however, when prescribed along with other strategies to control inflammation, their use is considered of benefit...
May 5, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28473630/epidermal-growth-factor-receptor-inhibition-downregulates-helicobacter-pylori-induced-epithelial-inflammatory-responses-dna-damage-and-gastric-carcinogenesis
#18
Johanna C Sierra, Mohammad Asim, Thomas G Verriere, M Blanca Piazuelo, Giovanni Suarez, Judith Romero-Gallo, Alberto G Delgado, Lydia E Wroblewski, Daniel P Barry, Richard M Peek, Alain P Gobert, Keith T Wilson
OBJECTIVE: Gastric cancer is the third leading cause of cancer death worldwide and infection by Helicobacter pylori is the strongest risk factor. We have reported increased epidermal growth factor receptor (EGFR) phosphorylation in the H. pylori-induced human carcinogenesis cascade, and association with DNA damage. Our goal was to determine the role of EGFR activation in gastric carcinogenesis. DESIGN: We evaluated gefitinib, a specific EGFR inhibitor, in chemoprevention of H...
May 4, 2017: Gut
https://www.readbyqxmd.com/read/28471809/antitumor-activities-of-the-synthetic-retinoid-st1926-in-two-dimensional-and-three-dimensional-human-breast-cancer-models
#19
Patrick Aouad, Melody Saikali, Rana Abdel-Samad, Sabreen Fostok, Leeanna El-Houjeiri, Claudio Pisano, Rabih Talhouk, Nadine Darwiche
Despite recent advances in chemotherapy, aggressive and metastatic breast cancers remain refractory to targeted therapy and the development of novel drugs is urgently needed. Retinoids are crucial regulators of cellular proliferation, differentiation, and cell death, and have shown potent chemotherapeutic and chemopreventive properties. The major drawback of the use of all-trans retinoic acid (ATRA) in cancer therapy is disease relapse. Therefore, synthetic retinoids, specifically ST1926, have emerged as potent anticancer agents...
May 3, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28468276/oleuropein-and-cancer-chemoprevention-the-link-is-hot
#20
REVIEW
Ammad Ahmad Farooqi, Sundas Fayyaz, Ana Sanches Silva, Antoni Sureda, Seyed Fazel Nabavi, Andrei Mocan, Seyed Mohammad Nabavi, Anupam Bishayee
Cancer comprises a collection of related diseases characterized by the existence of altered cellular pathways resulting in an abnormal tendency for uncontrolled growth. A broad spectrum, coordinated, and personalized approach focused on targeting diverse oncogenic pathways with low toxicity and economic natural compounds can provide a real benefit as a chemopreventive and/or treatment of this complex disease. Oleuropein, a bioactive phenolic compound mainly present in olive oil and other natural sources, has been reported to modulate several oncogenic signalling pathways...
April 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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