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https://www.readbyqxmd.com/read/29143981/high-plasma-25-hydroxyvitamin-d-and-high-risk-of-non-melanoma-skin-cancer-a-mendelian-randomisation-study-of-97849-individuals
#1
U C Winsløw, B G Nordestgaard, S Afzal
BACKGROUND: High plasma 25-hydroxyvitamin D (25 (OH)D) concentration has been associated observationally with high risk of non-melanoma skin cancer, while many studies suggest that vitamin D could have a protective effect on cancer. The true association between vitamin D and risk of skin cancer remains unclear. OBJECTIVES: In this Mendelian randomisation study we tested the hypothesis that genetically high plasma 25(OH)D protects against non-melanoma skin cancer...
November 16, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/29142606/hesperidin-inhibits-ovarian-cancer-cell-viability-through-endoplasmic-reticulum-stress-signaling-pathways
#2
Jun Zhao, Yali Li, Jinfang Gao, Yinshan De
Hesperidin is a vitamin P flavonoid compound primarily present in citrus fruits. The aim of the present study was to investigate whether hesperidin inhibits ovarian cancer cell viability via endoplasmic reticulum stress signaling pathways. A2780 cells were treated with various doses of hesperidin for 6, 12 or 24 h, and the viability of A2780 cells was assessed using the MTT assay. Hesperidin decreased the viability of A2780 cells and increased cytotoxicity in a dose- and time-dependent manner. In addition, hesperidin induced apoptosis and increased cleaved caspase-3 protein expression levels in A2780 cells...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29139074/excessive-use-of-nitrogenous-fertilizers-an-unawareness-causing-serious-threats-to-environment-and-human-health
#3
Moddassir Ahmed, Muhammad Rauf, Zahid Mukhtar, Nasir Ahmad Saeed
Farmers occasionally need to add nitrogen fertilizer to their farms and gardens to make available just the precise nutrients for their plants' growth. The applications of inorganic nitrogen fertilizers to various crops have been continuously increasing since last many decades globally. Although nitrogen fertilizer contributes substantially to yield enhancement, but excessive use of this manure has posed serious threats to environment and human health. Rate of nitrogen fertilizers application has a close relationship with nitrate accumulation in surrounding environment, groundwater, as well as leafy and root vegetables...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29132138/acute-effects-of-vitamin-c-exposure-on-colonic-crypts-direct-modulation-of-ph-regulation
#4
Mohammed M Aldajani, Clemens N Vanicek, Norah Alhazzaa, Taras Lysyy, Raghav Agarwal, John P Geibel
BACKGROUND/AIM: Colorectal cancer is still considered a leading cause of death in the United States and worldwide. One potential way to improve survival besides detection is to look to new therapeutic agents that can be taken prophylactically to reduce the risk of tumor formation. For cancer cells to grow and invade, a higher (more alkaline) intracellular pH must occur. We chose to examine a specific nutraceutical agent, which is Vitamin C. The acute effect of Vitamin C exposure on normal colonic crypts has been studied, providing some insight into how Vitamin C achieve its effect...
November 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29129231/the-association-between-the-index-of-nutritional-quality-inq-and-breast-cancer-and-the-evaluation-of-nutrient-intake-of-breast-cancer-patients-a-case-control-study
#5
Farhad Vahid, Mahshid Hatami, Mahya Sadeghi, Fatemeh Ameri, Zeinab Faghfoori, Sayed Hossein Davoodi
OBJECTIVE: Breast cancer (BrCa) is the most frequently diagnosed cancer among females and second cancer after lung cancer in many societies. In Iran, the risk for BrCa is 1 in 35 and each year, 8000 new patients have been diagnosed with BrCa. Studies have shown that dietary components are implicated in the etiology of BrCa. The Index of Nutritional Quality (INQ) is a method of quantitative and qualitative analysis of single foods, meals, and diets. The aim of this study was to determine the usefulness of INQs in predicting BrCa risk...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29124692/ultraviolet-radiations-skin-defense-damage-mechanism
#6
Dheeraj Mohania, Shikha Chandel, Parveen Kumar, Vivek Verma, Kumar Digvijay, Deepika Tripathi, Khushboo Choudhury, Sandeep Kumar Mitten, Dilip Shah
UV-radiations are the invisible part of light spectra having a wavelength between visible rays and X-rays. Based on wavelength, UV rays are subdivided into UV-A (320-400 nm), UV-B (280-320 nm) and UV-C (200-280 nm). Ultraviolet rays can have both harmful and beneficial effects. UV-C has the property of ionization thus acting as a strong mutagen, which can cause immune-mediated disease and cancer in adverse cases. Numbers of genetic factors have been identified in human involved in inducing skin cancer from UV-radiations...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29116467/vitamin-d-supplementation-decreases-serum-27-hydroxycholesterol-in-a-pilot-breast-cancer-trial
#7
Catherine C Going, Ludmila Alexandrova, Kenneth Lau, Christine Y Yeh, David Feldman, Sharon J Pitteri
PURPOSE: 27-hydroxycholesterol (27HC), an endogenous selective estrogen receptor modulator (SERM), drives the growth of estrogen receptor-positive (ER+) breast cancer. 1,25-dihydroxyvitamin D (1,25(OH)2D), the active metabolite of vitamin D, is known to inhibit expression of CYP27B1, which is very similar in structure and function to CYP27A1, the synthesizing enzyme of 27HC. Therefore, we hypothesized that 1,25(OH)2D may also inhibit expression of CYP27A1, thereby reducing 27HC concentrations in the blood and tissues that express CYP27A1, including breast cancer tissue...
November 7, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29106699/immunohistochemical-expression-of-vitamin-d-receptor-in-melanocytic-nevi-and-cutaneous-melanoma-a-case-control-study
#8
C Del Puerto, C Navarrete-Dechent, M Molgó, C A Camargo, A Borzutzky, S González
BACKGROUND: Vitamin D (VD) deficiency is associated with higher risk of cancer, possibly due to anti-proliferative, anti-angiogenic, pro-apoptotic, cell-differentiating and anti-invasive effects. The anti-carcinogenic role of VD in melanoma is still a matter of debate. Loss of nuclear and cytoplasmic vitamin D Receptor (VDR) expression in melanoma cells has been reported. OBJECTIVE: To analyze VDR immunohistochemical expression in benign dermal nevi (DN) and MM...
November 6, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/29104950/-89-zr-cobalamin-pet-tracer-synthesis-cellular-uptake-and-use-for-tumor-imaging
#9
Akhila N W Kuda-Wedagedara, Jayme L Workinger, Ebba Nexo, Robert P Doyle, Nerissa Viola-Villegas
Vitamin B12, or cobalamin (Cbl), is an essential nutrient. Acquisition, transport, and cellular internalization of Cbl are dependent on specific binding proteins and associated receptors. The circulating transport protein transcobalamin (TC) promotes cellular uptake via binding to specific receptors such as CD320, a receptor upregulated in several cancer cell lines. In this study, we report the successful synthesis of (89)Zirconium-labeled Cbl that was derivatized with desferrioxamine ((89)Zr-Cbl). We document the purity of the tracer and its binding to TC compared with that of unmodified cyano-Cbl (CN-Cbl)...
October 31, 2017: ACS Omega
https://www.readbyqxmd.com/read/29103966/an-update-of-research-evidence-on-nutrition-and-prostate-cancer
#10
REVIEW
Pao-Hwa Lin, William Aronson, Stephen J Freedland
BACKGROUND: Prostate cancer (PCa) remains a leading cause of mortality in US and other countries. Preclinical and clinical studies have examined the role of nutrition and dietary intake on the incidence and progression of PCa with mixed results. OBJECTIVE: The objective of this chapter is to provide an update of recent published literature and highlight progress in the field. MAIN FINDINGS: Low carbohydrate intake, soy protein, ω3 fat, green teas, tomatoes and tomato products and the herbal mixture-zyflamend showed promise in reducing PCa risk or progression...
November 2, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/29102482/vitamin-c-a-new-player-in-regulation-of-the-cancer-epigenome
#11
REVIEW
Linn Gillberg, Andreas D Ørskov, Minmin Liu, Laurine B S Harsløf, Peter A Jones, Kirsten Grønbæk
Over the past few years it has become clear that vitamin C, as a provider of reduced iron, is an essential factor for the function of epigenetic regulators that initiate the demethylation of DNA and histones. Vitamin C deficiency is rare in the general population, but is frequently observed in patients with cancer. Genes encoding epigenetic regulators are often mutated in cancer, underscoring their central roles in carcinogenesis. In hematological cancers, such as acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS), drugs that reverse epigenetic aberrations are now the standard of care...
November 1, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/29089348/circulating-vitamin-d-concentration-and-risk-of-seven-cancers-mendelian-randomisation-study
#12
Vasiliki I Dimitrakopoulou, Konstantinos K Tsilidis, Philip C Haycock, Niki L Dimou, Kawthar Al-Dabhani, Richard M Martin, Sarah J Lewis, Marc J Gunter, Alison Mondul, Irene M Shui, Evropi Theodoratou, Katharina Nimptsch, Sara Lindström, Demetrius Albanes, Tilman Kühn, Timothy J Key, Ruth C Travis, Karani Santhanakrishnan Vimaleswaran, Peter Kraft, Brandon L Pierce, Joellen M Schildkraut
Objective To determine if circulating concentrations of vitamin D are causally associated with risk of cancer.Design Mendelian randomisation study.Setting Large genetic epidemiology networks (the Genetic Associations and Mechanisms in Oncology (GAME-ON), the Genetic and Epidemiology of Colorectal Cancer Consortium (GECCO), and the Prostate Cancer Association Group to Investigate Cancer Associated Alterations in the Genome (PRACTICAL) consortiums, and the MR-Base platform).Participants 70 563 cases of cancer (22 898 prostate cancer, 15 748 breast cancer, 12 537 lung cancer, 11 488 colorectal cancer, 4369 ovarian cancer, 1896 pancreatic cancer, and 1627 neuroblastoma) and 84 418 controls...
October 31, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/29080461/l-ascorbic-acid-2-glucoside-inhibits-helicobacter-pylori-induced-apoptosis-through-mitochondrial-pathway-in-gastric-epithelial-cells
#13
Xiong Chen, Rui Liu, Xiaoming Liu, Canxia Xu, Xiaoyan Wang
Helicobacter pylori (H. pylori) infection is the major cause for gastritis, peptic ulcer, and gastric cancer. Elevated oxidative stress, mitochondrial dysfunction and apoptotic death of gastric epithelial cells are typical hallmarks of H. pylori infection. Ascorbic Acid 2-Glucoside (AA2G) is a stable version of Vitamin C, that binds glucose to conventional vitamin C. AA2G has free radical scavenging activities and anti-apoptotic abilities. However, the protective effect of AA2G against H. pylori-infection in gastric epithelial cells is yet unknown...
October 25, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29073636/global-metabolomic-profiling-of-uterine-leiomyomas
#14
Hanna-Riikka Heinonen, Miika Mehine, Netta Mäkinen, Annukka Pasanen, Esa Pitkänen, Auli Karhu, Nanna S Sarvilinna, Jari Sjöberg, Oskari Heikinheimo, Ralf Bützow, Lauri A Aaltonen, Eevi Kaasinen
BACKGROUND: Uterine leiomyomas can be classified into molecularly distinct subtypes according to their genetic triggers: MED12 mutations, HMGA2 upregulation, or inactivation of FH. The aim of this study was to identify metabolites and metabolic pathways that are dysregulated in different subtypes of leiomyomas. METHODS: We performed global metabolomic profiling of 25 uterine leiomyomas and 17 corresponding myometrium specimens using liquid chromatography-tandem mass spectroscopy...
October 26, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29070616/results-from-the-european-prospective-investigation-into-cancer-and-nutrition-epic-link-vitamin-b6-catabolism-and-lung-cancer-risk
#15
Hui Zuo, Per Magne Ueland, Øivind Midttun, Stein E Vollset, Grethe S Tell, Despoina Theofylaktopoulou, Ruth C Travis, Marie-Christine Boutron-Ruault, Agnes Fournier, Gianluca Severi, Marina Kvaskoff, Heiner Boeing, Manuela Bergmann, Renée Turzanski Fortner, Rudolf Kaaks, Antonia Trichopoulou, Anastasia Kotanidou, Pagona Lagiou, Domenico Palli, Sabina Sieri, Salvatore Panico, H B As Bueno-de-Mesquita, Petra H Peeters, Kjell Grankvist, Mikael Johansson, Antonio Agudo, Jose Ramón Quirós Garcia, Nerea Larrañaga, Maria-Jose Sanchez, Maria-Dolores Chirlaque, Eva Ardanaz, Shu-Chun Chuang, Valentina Gallo, Paul Brennan, Mattias Johansson, Arve Ulvik
Circulating pyridoxal-5'-phosphate (PLP) has been linked to lung cancer risk. The PAr index, defined as the ratio 4-pyridoxic acid / (pyridoxal + PLP), reflects increased vitamin B6 catabolism during inflammation. PAr has been defined as a marker of lung cancer risk in a prospective cohort study, but analysis of a larger numbers of cases are needed to deepen the significance of this study. Here we conducted a nested case-control study within the European Prospective Investigation into Cancer and Nutrition (EPIC, n = 521,330), which included 892 incident lung cancer cases and 1748 controls matched by center, gender, date of blood collection and date of birth...
October 25, 2017: Cancer Research
https://www.readbyqxmd.com/read/29069637/redox-active-metals-and-h2o2-mediate-the-increased-efficacy-of-pharmacological-ascorbate-in-combination-with-gemcitabine-or-radiation-in-pre-clinical-sarcoma-models
#16
Joshua D Schoenfeld, Zita A Sibenaller, Kranti A Mapuskar, Megan D Bradley, Brett A Wagner, Garry R Buettner, Varun Monga, Mohammed Milhem, Douglas R Spitz, Bryan G Allen
Soft tissue sarcomas are a histologically heterogeneous group of rare mesenchymal cancers for which treatment options leading to increased overall survival have not improved in over two decades. The current study shows that pharmacological ascorbate (systemic high dose vitamin C achieving ≥ 20mM plasma levels) is a potentially efficacious and easily integrable addition to current standard of care treatment strategies in preclinical models of fibrosarcoma and liposarcoma both in vitro and in vivo. Furthermore, enhanced ascorbate-mediated toxicity and DNA damage in these sarcoma models were found to be dependent upon H2O2 and intracellular labile iron...
September 28, 2017: Redox Biology
https://www.readbyqxmd.com/read/29060367/personalized-cumulative-uv-tracking-on-mobiles-wearables
#17
S Dey, S Sahoo, H Agrawal, A Mondal, T Bhowmik, V N Tiwari
Maintaining a balanced Ultra Violet (UV) exposure level is vital for a healthy living as the excess of UV dose can lead to critical diseases such as skin cancer while the absence can cause vitamin D deficiency which has recently been linked to onset of cardiac abnormalities. Here, we propose a personalized cumulative UV dose (CUVD) estimation system for smartwatch and smartphone devices having the following novelty factors; (a) sensor orientation invariant measurement of UV exposure using a bootstrap resampling technique, (b) estimation of UV exposure using only light intensity (lux) sensor (c) optimal UV exposure dose estimation...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29049045/nutrition-physical-activity-and-lifestyle-factors-in-prostate-cancer-prevention
#18
Eric Ballon-Landa, John Kellogg Parsons
PURPOSE OF REVIEW: To review current evidence for prostate cancer prevention with nutrition, physical activity, and lifestyle interventions and identify future research directions. RECENT FINDINGS: Multiple preclinical and observational studies have observed that diet, exercise, and lifestyle interventions may play a role in mitigating disease progression, mortality, and overall disease burden for high-grade and fatal prostate cancer. Increased vegetable and fruit intakes, decreased red meat and saturated fat intakes, and increased exercise are potentially associated with decreased risk of incident disease and increased progression-free, prostate cancer-specific, and overall survival...
October 18, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/29043851/antioxidants-in-the-treatment-of-cancer
#19
Kanthi Athreya, Marin F Xavier
Several clinical trials have produced conflicting results regarding the benefit of antioxidants in cancer therapy thus questioning the incorporation of these substances in standard treatment regimens. Vitamins E and C, selenium, carotenoids, lycopene, soy products, and green tea extract are a few substances with antioxidant properties that have been studied in detail. This article reviews the results generated over the last 20 years through in vitro and in vivo studies in various types of cancers and stages of cancer treatment...
October 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29040674/evaluation-of-apoptotic-and-autophagic-related-protein-expressions-before-and-after-ivm-of-fresh-slow-frozen-and-vitrified-pre-pubertal-mouse-testicular-tissue
#20
L Dumont, F Chalmel, A Oblette, B Berby, A Rives, V Duchesne, C Rondanino, N Rives
STUDY QUESTION: Do freezing and in vitro culture procedures enhance the expression of proteins involved in apoptotic or autophagic pathways in murine pre-pubertal testicular tissue? SUMMARY ANSWER: IVM strongly modified apoptosis- and autophagy-related relative protein levels in mice testicular tissue whereas the impact of cryopreservation procedures was minimal at the end of the culture. WHAT IS KNOWN ALREADY: In vitro spermatogenesis remains a challenging technical issue as it imposes to find a very close balance between survival and death of germ cell natural precursors (i...
November 1, 2017: Molecular Human Reproduction
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