Safety of vitamin C in sepsis: a neglected topic.

Although vitamin C is essentially a nontoxic vitamin; however, it is important to be aware regarding the safety of high doses before the wide clinical use. Minor side effects of vitamin C have been reported, many being reported in earlier studies. High doses of vitamin C (up to 1.5 g/kg three times a week as intravenously) were safe in cancer patients with normal renal function and perfect glucose-6-phosphate dehydrogenase activity. As the dose and duration of administration of vitamin C in sepsis are lower and shorter than those used in cancer patients, it seems that it is relatively safe for this population. In ongoing trials, safety of high doses of vitamin C is considered. Data regarding the safety of high doses of vitamin C are scant. Until more data become available, caution should be applied in the use of high doses of vitamin C in patients with hemochromatosis, glucose-6-phosphate dehydrogenase deficiency, renal dysfunction, kidney stone, oxaluria, and pediatrics.
Source: Current Awareness Service for Health (CASH) - Category: Consumer Health News Source Type: news

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Authors: Mao J, Wu H, Liu C, Zhu C, Lao J, Chen Y, Tao J, Zhang Y, Shen L Abstract Purpose: To observe the changes in metamorphopsia, visual acuity, and central macular thickness (CMT) in patients undergoing vitrectomy for idiopathic epiretinal membranes (iERM); all of which were preoperatively stratified into 4 stages according to the anatomical structure of the macula seen on the optical coherence tomography (OCT) b-scan images. Methods: A total of 108 eyes of 106 patients were included. We evaluated and classified the severity of each preoperative ERM based on OCT. Changes in the best-corrected visual acuity...
Source: Journal of Ophthalmology - Category: Opthalmology Tags: J Ophthalmol Source Type: research
Conclusion: The majority of children with RB in Uganda present clinically with leucokoria, and their parents or guardians seek medical intervention at a later stage. Moreover, there was a noticeably significant lag period for the patients to begin treatment after the diagnosis was done. PMID: 31316824 [PubMed]
Source: Journal of Ophthalmology - Category: Opthalmology Tags: J Ophthalmol Source Type: research
Authors: Lorenzo-González M, Torres-Durán M, Barbosa-Lorenzo R, Provencio-Pulla M, Barros-Dios JM, Ruano-Ravina A Abstract Introduction: Lung cancer is the most important cause of cancer mortality. It is a multifactorial disease with multiple risk factors, including residential radon exposure. Areas covered: The aim of this paper was to review the epidemiology of residential radon exposure and its impact on lung cancer risk. While tobacco is the main risk factor of lung cancer, residential radon is the first cause in never-smokers and the second in ever-smokers. Moreover, the synergistic effect betwee...
Source: Expert Review of Respiratory Medicine - Category: Respiratory Medicine Tags: Expert Rev Respir Med Source Type: research
Journal Name: Journal of Perinatal Medicine Issue: Ahead of print
Source: Journal of Perinatal Medicine - Category: Perinatology & Neonatology Source Type: research
Authors: Grossmann M, Ramchand SK, Milat F, Vincent A, Lim E, Kotowicz MA, Hicks J, Teede HJ Abstract INTRODUCTION: Representatives appointed by relevant Australian medical societies used a systematic approach for adaptation of guidelines (ADAPTE) to formulate clinical consensus recommendations on assessment and management of bone health in women with oestrogen receptor-positive early breast cancer receiving endocrine therapy. The current evidence suggests that women receiving adjuvant aromatase inhibitors and pre-menopausal woman treated with tamoxifen have accelerated bone loss and that women receiving adjuvant a...
Source: Medical Journal of Australia - Category: General Medicine Tags: Med J Aust Source Type: research
Publication date: Available online 18 July 2019Source: Biochimica et Biophysica Acta (BBA) - Molecular Cell ResearchAuthor(s): Karolina Rogala-Koziarska, Łukasz Samluk, Katarzyna A. NałęczAbstractPlasma membrane transporter SLC6A14 transports all neutral and basic amino acids in a Na/Cl – dependent way and it is up-regulated in many types of cancer. Mass spectrometry analysis of overexpressed SLC6A14–associated proteins identified, among others, the presence of cytosolic heat shock proteins (HSPs) and co-chaperones. We detected co-localization of overexpressed and native SLC6A14 with HSP90-beta and HSP70 (HS...
Source: Biochimica et Biophysica Acta (BBA) Molecular Cell Research - Category: Molecular Biology Source Type: research
In this study, we investigated the effects of stress on immunosurveillance against cancer cells using a previously established examination stress model. We showed that the cancer killing activity (CKA) of granulocytes (also known as polymorphic nuclear cells, PMNs) is sharply reduced during examination stress stimulation in some donors who are psychologically sensitive to examination stress, with the concentration of plasma stress hormones (cortisone, epinephrine, and norepinephrine) increasing accordingly. The effects of stress hormones on immune cell CKA were also investigated under two in vitro co-incubation conditions,...
Source: Stress - Category: Research Tags: Stress Source Type: research
Publication date: 1 September 2019Source: Life Sciences, Volume 232Author(s): Meng Wang, Haibin Wu, Mingyue Duan, Ying Yang, Guoxia Wang, Fengyu Che, Bailing Liu, Wei He, Qiao Li, Liyu ZhangAbstractAimsCD123 represents an important acute myeloid leukemia (AML) therapeutic target. CD123 aptamers may potentially serve as tumor-homing ligands with excellent affinity and specificity for AML targeted therapy, but their complexity, laborious preparation and nuclease digestion limited pharmacological application. The aim of this study was to develop the first CD123 thioaptamer to overcome these obstacles.Main methodsFlow cytometr...
Source: Life Sciences - Category: Biology Source Type: research
Publication date: Available online 19 July 2019Source: Microvascular ResearchAuthor(s): S. West, O. Smail, B. BondAbstractBackgroundSugar sweetened beverages (SSB) are a major source of dietary sugar and a public health concern. Glucose consumption acutely influences microvascular reactivity in healthy adults, possibly via oxidative stress. The purpose of this study was to observe the acute influence of a more relevant dose of sucrose on microvascular reactivity, and to identify whether this response is influenced by the amount of vitamin C typically contained in SSB.MethodsThirteen ostensibly healthy adults (8 male, 5 fem...
Source: Microvascular Research - Category: Biochemistry Source Type: research
Publication date: 1 October 2019Source: Colloids and Surfaces B: Biointerfaces, Volume 182Author(s): Zhimei Wei, Wei Zhao, Yimin Wang, Xiaojun Wang, Shengru Long, Jie YangAbstractStimuli-responsive smart polymers have been studied extensively. In this work, thermoresponsive poly (N-isopropylacrylamide-N-methylolacrylamide-acrylamide) (PNIPAm-NMA-Am) was successfully synthesised via radical polymerisation, as confirmed by proton nuclear magnetic resonance and fourier transform infrared spectroscopy. PNIPAm-NMA-Am was electrospun into nanofibres, allowing its use as a drug carrier after simple thermal treatment. Thermogravi...
Source: Colloids and Surfaces B: Biointerfaces - Category: Biochemistry Source Type: research
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