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vitamin c cancer

Hwi Young Kim, Dong Hyeon Lee, Jeong-Hoon Lee, Young Youn Cho, Eun Ju Cho, Su Jong Yu, Yoon Jun Kim, Jung-Hwan Yoon
BACKGROUND: Prediction of the outcome of sorafenib therapy using biomarkers is an unmet clinical need in patients with advanced hepatocellular carcinoma (HCC). The aim was to develop and validate a biomarker-based model for predicting sorafenib response and overall survival (OS). METHODS: This prospective cohort study included 124 consecutive HCC patients (44 with disease control, 80 with progression) with Child-Pugh class A liver function, who received sorafenib...
March 20, 2018: BMC Cancer
Gary R Zirpoli, Susan E McCann, Lara E Sucheston-Campbell, Dawn L Hershman, Gregory Ciupak, Warren Davis, Joseph M Unger, Halle C F Moore, James A Stewart, Claudine Isaacs, Timothy J Hobday, Muhammad Salim, Gabriel N Hortobagyi, Julie R Gralow, G Thomas Budd, Kathy S Albain, Christine B Ambrosone
Background: Chemotherapy-induced peripheral neuropathy (CIPN) can interfere with daily function and quality of life, and there are no known preventive approaches. In a cohort of breast cancer patients receiving paclitaxel as part of a clinical trial (SWOG 0221), we examined the use of dietary supplements both before diagnosis and during treatment in relation to CIPN. Methods: At registration to S0221, 1225 breast cancer patients completed questionnaires regarding the use of multivitamins and supplements before and at diagnosis...
December 1, 2017: Journal of the National Cancer Institute
Karen E Assmann, Moufidath Adjibade, Nitin Shivappa, James R Hébert, Michael D Wirth, Mathilde Touvier, Tasnime Akbaraly, Serge Hercberg, Pilar Galan, Chantal Julia, Emmanuelle Kesse-Guyot
Background: While low-grade chronic inflammation has been suggested as a major modulator of healthy aging (HA), no study has yet investigated the link between the inflammatory potential of the diet and multidimensional concepts of HA. Objective: We aimed to evaluate the association between the inflammatory potential of the diet at midlife, as measured by the Dietary Inflammatory Index (DII), and HA assessed 13 y later. Methods: We analyzed data from 2796 participants in the French Supplémentation en Vitamines et Minéraux Antioxydants (SU...
March 1, 2018: Journal of Nutrition
Suhong Xiao, Ying-Sheng Tang, Praveen Kusumanchi, Sally P Stabler, Ying Zhang, Asok C Antony
Background: Epidemiologic and in vitro studies suggest independent linkages between poor folate and/or vitamin B-12 nutrition, genomic human papillomavirus (HPV) type 16 viral integration, and cancer. However, there is no direct evidence in vivo to support the causative role of poor folate nutrition in HPV16 integration into the cellular genome. Objective: We tested the hypothesis that folate deficiency enables the integration of HPV16 into the genome of HPV16-harboring keratinocytes, and could thereby influence earlier transformation of these cells to cancer in an animal model...
March 1, 2018: Journal of Nutrition
Gwendolyn N Y van Gorkom, Roel G J Klein Wolterink, Catharina H M J Van Elssen, Lotte Wieten, Wilfred T V Germeraad, Gerard M J Bos
Vitamin C or ascorbic acid (AA) is implicated in many biological processes and has been proposed as a supplement for various conditions, including cancer. In this review, we discuss the effects of AA on the development and function of lymphocytes. This is important in the light of cancer treatment, as the immune system needs to regenerate following chemotherapy or stem cell transplantation, while cancer patients are often AA-deficient. We focus on lymphocytes, as these white blood cells are the slowest to restore, rendering patients susceptible to often lethal infections...
March 10, 2018: Antioxidants (Basel, Switzerland)
Sara Nejatinamini, Catherine Kubrak, Mirey Álvarez-Camacho, Vickie E Baracos, Sunita Ghosh, Wendy V Wismer, Vera C Mazurak
This study assessed dietary and micronutrient intakes of head and neck cancer (HNC) patients at key points in the disease trajectory and evaluated the contribution of oral nutritional supplements (ONS) to micronutrient intake. HNC patients (n = 114) completed a three-day dietary record and a tool to assess Nutrition Impact Scores (NIS) at baseline, post-treatment, and follow-up. Foods were classified into food categories. Micronutrient, protein, and energy intakes were compared to European Society for Parenteral and Enteral Nutrition guidelines for cancer patients...
March 13, 2018: Nutrition and Cancer
Harrison T Supnick, Rodica P Bunaciu, Andrew Yen
Differentiation therapy is used in cancer treatment. Epidemiologic studies showed that higher vitamin D levels are associated with reduced cancer risks. However, the therapeutic doses needed for differentiation are accompanied by hypercalcemia and intolerable pathological sequelae. In the present work we evaluated if RRD-251, a small-molecule, can enhance vitamin D3-induced differentiation of leukemic cells, in the hope of decreasing the needed vitamin D3-dose. We demonstrate that RRD-251 enhances vitamin D3-induced differentiation of leukemic cells, the enrichment of the c-Raf kinase in the nucleus, the binding of nuclear c-Raf to GSK-3, increased phosphorylation of GSK-3 ser 21/9 inhibitory sites, and the binding of GSK-3 to VDR, where GSK-3 inhibition is known to enhance transcriptional activation by VDR...
February 9, 2018: Oncotarget
Bridget Shafit-Zagardo, Ross C Gruber, Juwen C DuBois
Tyro3, Axl, and Mertk, referred to as the TAM family of receptor tyrosine kinases, are instrumental in maintaining cell survival and homeostasis in mammals. TAM receptors interact with multiple signaling molecules to regulate cell migration, survival, phagocytosis and clearance of metabolic products and cell debris called efferocytosis. The TAMs also function as rheostats to reduce the expression of proinflammatory molecules and prevent autoimmunity. All three TAM receptors are activated in a concentration-dependent manner by the vitamin K-dependent growth arrest-specific protein 6 (Gas6)...
March 4, 2018: Pharmacology & Therapeutics
Martin Torp Rahbek, Rudolf Scheller, Mads Nybo, Jesper Ryg
We report two cases of transient significantly elevated plasma cobalamin (B12) in geriatric patients acutely admitted with fever, increased C-reactive protein and X-ray verified pneumonia. Extensive diagnostic workup did not reveal kidney or liver disease, neither any signs of cancer. Furthermore, none of the patients had received therapeutic B12 supplementation prior to admission. In both cases, plasma B12 normalized at an out-patient control few months later. We were not able to identify the reason for the initial B12 elevation in any of the patients, since none of the usually recognized causes were evident...
March 7, 2018: Scandinavian Journal of Clinical and Laboratory Investigation
Seth D Crockett, Elizabeth L Barry, Leila A Mott, Dennis J Ahnen, Douglas J Robertson, Joseph C Anderson, Kristen Wallace, Carol A Burke, Robert S Bresalier, Jane C Figueiredo, Dale C Snover, John A Baron
OBJECTIVE: Serrated lesions such as sessile serrated adenomas or polyps (SSA/Ps) are important colorectal cancer precursors, but aetiological factors for these lesions are largely unknown. We aimed to determine the effects of calcium and vitamin D supplementation on the incidence of serrated polyps (SPs) in general and hyperplastic polyps and SSA/Ps specifically. DESIGN: Participants with one or more adenoma at baseline were randomised to receive 1200 mg/day of elemental calcium, 1000 IU/day of vitamin D3 , both or neither agent...
March 1, 2018: Gut
Kimberly L Santucci, John M Baust, Kristi K Snyder, Robert G Van Buskirk, John G Baust
Vitamin D3 (VD3 ) is an effective adjunctive agent, enhancing the destructive effects of freezing in prostate cancer cryoablation studies. We investigated whether dose escalation of VD3 over several weeks, to model the increase in physiological VD3 levels if an oral supplement were prescribed, would be as or more effective than a single treatment 1 to 2 days prior to freezing. PC-3 cells in log phase growth to model aggressive, highly metabolically active prostate cancer were exposed to a gradually increasing dose of VD3 to a final dose of 80 nM over a 4-week period, maintained for 2 weeks at 80 nM, and then exposed to mild sublethal freezing temperatures...
January 2018: Cancer Control: Journal of the Moffitt Cancer Center
Matthew Granger, Peter Eck
Vitamin C is essential to prevent scurvy in humans and is implicated in the primary prevention of common and complex diseases such as coronary heart disease, stroke, and cancer. This chapter reviews the latest knowledge about dietary vitamin C in human health with an emphasis on studies of the molecular mechanisms of vitamin C maintenance as well as gene-nutrient interactions modifying these relationships. Epidemiological evidence indicates 5% prevalence for vitamin C deficiency and 13% prevalence for suboptimal status even in industrialized countries...
2018: Advances in Food and Nutrition Research
I García-Escobar, C Beato-Zambrano, J Muñoz Langa, E Brozos Vázquez, B Obispo Portero, D Gutiérrez-Abad, A J Muñoz Martín
The association between venous thromboembolism (VTE) and cancer has been recognized for more than 100 years. Numerous studies have been performed to investigate strategies to decrease VTE incidence and to establish whether treating VTE impacts cancer progression and overall survival. Accordingly, it is important to understand the role of the hemostatic system in tumorigenesis and progression, as there is abundant evidence associating it with cell survival and proliferation, tumor angiogenesis, invasion, and dissemination, and metastasis formation...
February 22, 2018: Clinical & Translational Oncology
M-J Hu, Q Zhang, L Liang, S-Y Wang, X-C Zheng, M-M Zhou, Y-W Yang, Q Zhong, F Huang
PURPOSE: Although vitamin D is reportedly associated with various cancers, the association between vitamin D and thyroid cancer is indefinite. We aimed to investigate whether this association applies to thyroid cancer (TC). METHODS: A total of 276 Chinese Han people were recruited in a current matched case-control study. Multivariable conditional logistic regression was computed to estimate the association between plasma 25(OH)D and papillary thyroid cancer (PTC)...
February 20, 2018: Journal of Endocrinological Investigation
Yuanxin Xi, Jiejun Shi, Wenqian Li, Kaori Tanaka, Kendra L Allton, Dana Richardson, Jing Li, Hector L Franco, Anusha Nagari, Venkat S Malladi, Luis Della Coletta, Melissa S Simper, Khandan Keyomarsi, Jianjun Shen, Mark T Bedford, Xiaobing Shi, Michelle C Barton, W Lee Kraus, Wei Li, Sharon Y R Dent
BACKGROUND: Epigenetic regulators are frequently mutated or aberrantly expressed in a variety of cancers, leading to altered transcription states that result in changes in cell identity, behavior, and response to therapy. RESULTS: To define alterations in epigenetic landscapes in breast cancers, we profiled the distributions of 8 key histone modifications by ChIP-Seq, as well as primary (GRO-seq) and steady state (RNA-Seq) transcriptomes, across 13 distinct cell lines that represent 5 molecular subtypes of breast cancer and immortalized human mammary epithelial cells...
February 20, 2018: BMC Genomics
Eduarda Schultze, Tiago Collares, Caroline Lucas, Fabiana K Seixas
All-trans retinoic acid (ATRA), a derivative of vitamin A, has been shown to potentiate cancer chemotherapy due to its ability to induce signals for cell differentiation or death, and inhibit cell proliferation. The combination of ATRA with taxoids, kinase inhibitors, natural compounds, retinoids, ER or HER2 inhibitors, chemotherapeutic drugs, proteasome inhibitors and nanoformulations of tretinoin have demonstrated additive or synergistic effects in anti-cancer activities. The mechanisms by which the compounds exert their synergistic effects depend on the tumor and the cell type...
February 16, 2018: Chemico-biological Interactions
Amanda Nioi, Charlotte Wendelboe-Nelson, Sue Cowan, Hilary Cowie, Shahzad Rashid, Peter Ritchie, Mark Cherrie, Terry C Lansdown, John W Cherrie
BACKGROUND: Exposure to sunlight can have both positive and negative health impacts. Excessive exposure to ultra-violet (UV) radiation from the sun can cause skin cancer, however insufficient exposure to sunlight has a detrimental effect on production of Vitamin D. In the construction industry there are onsite proactive behaviours for safety, but sun-safety remains a low priority. There is limited research on understanding the barriers to adopting sun-safe behaviours and the association this may have with Vitamin D production...
February 15, 2018: BMC Public Health
P W Jupp
Cancer incidence continues to be a major health problem possibly because cancer is a complex system comprising many agents that interact in a non-linear manner resulting in many possible outcomes. The degree of complexity of a cancer system could be vast involving multiple endogenous and exogenous agents interacting with the over 10 trillion cells comprising the body. It is hypothesized that the practical management of this complexity may be a key to cancer prevention and possibly treatment. But the management and resolution of such an immensely complex system is difficult and may require a multidisciplinary approach including physics, biology, biochemistry and medical science...
March 2018: Medical Hypotheses
Boyoung Park, Jinhee Lee, Jeongseon Kim
This study was conducted to examine the nutrient intake status of cancer survivors. A total of 5224 cancer survivors, 19,926 non-cancer individuals without comorbidities (non-cancer I), and 20,622 non-cancer individuals with comorbidities, matched by age, gender, and recruitment center location were included in the analysis. Generally, the proportion of total energy from carbohydrates was higher and the proportion from fat was lower in cancer survivors. The odds ratios (ORs) for total energy (OR = 0.92, 95% confidence interval (CI) = 0...
February 14, 2018: Nutrients
Juliet M Pullar, Simone Bayer, Anitra C Carr
Vitamin C (ascorbate) is the major water-soluble antioxidant in plasma and its oxidation to dehydroascorbic acid (DHA) has been proposed as a marker of oxidative stress in vivo. However, controversy exists in the literature around the amount of DHA detected in blood samples collected from various patient cohorts. In this study, we report on DHA concentrations in a selection of different clinical cohorts (diabetes, pneumonia, cancer, and critically ill). All clinical samples were collected into EDTA anticoagulant tubes and processed at 4 °C prior to storage at -80 °C for subsequent analysis by HPLC with electrochemical detection...
February 11, 2018: Antioxidants (Basel, Switzerland)
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