keyword
MENU ▼
Read by QxMD icon Read
search

Triclosan

keyword
https://www.readbyqxmd.com/read/29156255/competitive-adsorption-of-ppcp-and-humic-substances-by-carbon-nanotube-membranes-effects-of-coagulation-and-ppcp-properties
#1
Yifei Wang, Qing Yang, Junqing Dong, Haiou Huang
Natural organic matter (NOM) and pharmaceuticals and personal care products (PPCP) are known to compete for adsorption sites on carbon nanotubes (CNT), resulting in decreasing PPCP adsorption onto CNT. In this study, four types of PPCP, as such acetaminophen (AAP), caffeine (CAF), triclosan (TCS), and carbendazim (CBD) were used to investigate the effects of PPCP properties and NOM coagulation on the competitive adsorption of PPCP and NOM. Coagulation preferentially removed HS from a natural surface water, thereby increasing adsorption of AAP, CAF, TCS and CBD by 19%, 13%, 17% and 11%, respectively...
November 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29154791/associations-of-early-life-urinary-triclosan-concentrations-with-maternal-neonatal-and-child-thyroid-hormone-levels
#2
Joseph M Braun, Aimin Chen, Andrew Hoofnagle, George D Papandonatos, Medina Jackson-Browne, Russ Hauser, Megan E Romano, Margaret R Karagas, Kimberly Yolton, R Thomas Zoeller, Bruce P Lanphear
BACKGROUND: Triclosan, an antimicrobial agent used in some consumer products, reduces endogenous thyroid hormone concentrations in rodents. Despite ubiquitous triclosan exposure and the importance of thyroid hormones for normal fetal development, few human studies have examined the impact of triclosan exposure on maternal, neonatal, or child thyroid hormones. METHODS: In the HOME Study, a prospective cohort from Cincinnati, OH, we measured urinary triclosan concentrations up to three times in pregnant women between 16weeks and delivery, and up to three times in children between age 1-3years...
November 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29154092/anoxic-biodegradation-of-triclosan-and-the-removal-of-its-antimicrobial-effect-in-microbial-fuel-cells
#3
Lu Wang, Yulei Liu, Chao Wang, Xiaodan Zhao, Gurumurthy Dummi Mahadeva, Yicheng Wu, Jun Ma, Feng Zhao
Triclosan (TCS) is an emerging organic contaminant in the environment. Here, the anoxic bio-degradation of TCS in microbial fuel cells (MFCs) was explored. It was found that anoxic biodegradation of TCS could be achieved in MFC, and the removal rate of TCS was accelerated after reactor acclimation. After 7 months of operation, 10mg/L TCS could be removed within 8days in MFCs. Fluorescence microscopy results revealed that the microbe cells in the reactors were intact, and the microbes were in active state. Flow cytometry test showed that the proliferation of inoculated microbe was higher in MFC effluent than that in TCS solution...
October 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29150338/impacts-of-prenatal-triclosan-exposure-on-fetal-reproductive-hormones-and-its-potential-mechanism
#4
Caifeng Wang, Limei Chen, Shasha Zhao, Yi Hu, Yijun Zhou, Yu Gao, Weiye Wang, Jun Zhang, Ying Tian
BACKGROUND: Triclosan (TCS) has been widely detected in pregnant women. The reproductive endocrine-disrupting effects of TCS have been observed in humans and animals. Little is known about the potential impact of prenatal TCS exposure on fetal reproductive development as well as its potential mechanism. OBJECTIVES: We investigated the potential effect of prenatal TCS exposure on fetal reproductive hormones in cord blood and its potential mechanism in relation to placental steroidogenic enzymes...
November 14, 2017: Environment International
https://www.readbyqxmd.com/read/29145094/a-mixture-of-five-endocrine-disrupting-chemicals-modulates-concentrations-of-bisphenol-a-and-estradiol-in-mice
#5
Tyler Pollock, Rachel E Weaver, Ramtin Ghasemi, Denys deCatanzaro
Most people in developed countries are exposed to multiple endocrine-disrupting synthetic chemicals. We previously showed that a single dose of triclosan, tetrabromobisphenol A (TBBPA), butyl paraben, propyl paraben, or di(2-ethylhexyl) phthalate elevated concentrations of bisphenol A (BPA) in mice. Here we investigated whether concurrent exposure to lower doses of these five chemicals could modulate concentrations of bisphenol A (BPA) or the natural estrogen, 17β-estradiol (E2). CF1 mice were injected subcutaneously with 0...
November 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29131715/microplastic-potentiates-triclosan-toxicity-to-the-marine-copepod-acartia-tonsa-dana
#6
Kristian Syberg, Anne Nielsen, Farhan R Khan, Gary T Banta, Annemette Palmqvist, Per M Jepsen
Microplastics (MP) are contaminants of environmental concern partly due to plastics ability to sorb and transport hydrophobic organic contaminants (HOC). The importance of this "vector effect" is currently being debated in the scientific community. This debate largely ignores that the co-exposures of MP and HOC are mixtures of hazardous agents, which can be addressed from a mixture toxicity perspective. In this study, mixture effects of polyethylene microbeads (MP) and triclosan (TCS) (a commonly used antibacterial agent in cosmetics) were assessed on the marine copepod Acartia tonsa...
November 13, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/29126948/polymerisation-antibacterial-and-bioactivity-properties-of-experimental-orthodontic-adhesives-containing-triclosan-loaded-halloysite-nanotubes
#7
Felipe Weidenbach Degrazia, Bruna Genari, Vicente Castelo Branco Leitune, Rodrigo Alex Arthur, Santiago Arias Luxan, Susana Maria Werner Samuel, Fabrício Mezzomo Collares, Salvatore Sauro
OBJECTIVE: To evaluate the immediate enamel bond strength, in situ degree of conversion and the polymerisation rate of three experimental orthodontic adhesives containing triclosan-loaded halloysite nanotubes. The antibacterial and bioactivity properties of such experimental materials were also assessed. MATERIALS AND METHODS: Three experimental orthodontic adhesives were formulated by incorporating triclosan-loaded halloysite nanotubes (TCN-HNT) at different concentrations (5wt%, 10wt% and 20wt%) into a resin blend (Control)...
November 7, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29123398/triclosan-resistance-reversion-by-encapsulation-in-chitosan-coated-nanocapsule-containing-%C3%AE-bisabolol-as-core-development-of-wound-dressing
#8
João Guilherme B De Marchi, Denise S Jornada, Fernanda K Silva, Ana L Freitas, Alexandre M Fuentefria, Adriana R Pohlmann, Silvia S Guterres
The use of nanoparticles may be particularly advantageous in treating bacterial infections due to their multiple simultaneous mechanisms of action. Nanoencapsulation is particularly useful for lipophilic drugs. In this scenario, triclosan is considered a good candidate due to its lipophilicity, broad-spectrum activity, and safety. In the present study, we have developed and characterized an antimicrobial suspension of triclosan and α-bisabolol against pathogenic strains that are resistant (Pseudomonas aeruginosa) and susceptible (Escherichia coli, Staphylococcus aureus, and Candida albicans) to triclosan...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29121543/up-stream-mechanisms-for-up-regulation-of-mir-125b-from-triclosan-exposure-to-zebrafish-danio-rerio
#9
Jiebo Lin, Caihong Wang, Jinfeng Liu, Randy A Dahlgren, Weiming Ai, Aibing Zeng, Xuedong Wang, Huili Wang
Triclosan (TCS) exposure has widely adverse biological effects such as influencing biological reproduction and endocrine disorders. While some studies have addressed TCS-induced expression changes of miRNAs and their related down-stream target genes, no data are available concerning how TCS impairs miRNA expression leading us to study up-stream regulating mechanisms. Four miRNAs (miR-125b, miR-205, miR-142a and miR-203a) showed differential expression between TCS-exposure treatments and the control group; their functions mainly involved fatty acid synthesis and metabolism...
November 6, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29112840/antibiotics-and-common-antibacterial-biocides-stimulate-horizontal-transfer-of-resistance-at-low-concentrations
#10
J Jutkina, N P Marathe, C-F Flach, D G J Larsson
There is a rising concern that antibiotics, and possibly other antimicrobial agents, can promote horizontal transfer of antibiotic resistance genes. For most types of antimicrobials their ability to induce conjugation below minimal inhibitory concentrations (MICs) is still unknown. Our aim was therefore to explore the potential of commonly used antibiotics and antibacterial biocides to induce horizontal transfer of antibiotic resistance. Effects of a wide range of sub-MIC concentrations of the antibiotics cefotaxime, ciprofloxacin, gentamicin, erythromycin, sulfamethoxazole, trimethoprim and the antibacterial biocides chlorhexidine digluconate, hexadecyltrimethylammoniumchloride and triclosan were investigated using a previously optimized culture-based assay with a complex bacterial community as a donor of mobile resistance elements and a traceable Escherichia coli strain as a recipient...
November 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29111444/toxicity-assessment-of-pesticide-triclosan-by-aquatic-organisms-and-degradation-studies
#11
Burcu Ertit Taştan, Turgay Tekinay, Hatice Sena Çelik, Caner Özdemir, Dilara Nur Cakir
Triclosan is considered as an important contaminant and is widely used in personal care products as an antimicrobial agent. This study demonstrates the biodegradation of triclosan by two freshwater microalgae and the acute toxicity of triclosan and 2,4-dichlorophenol. The effects of culture media and light on biodegradation of triclosan and the changing morphology of microalgae were systematically studied. Geitlerinema sp. and Chlorella sp. degraded 82.10% and 92.83% of 3.99 mg/L of triclosan at 10 days, respectively...
October 27, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29111213/prenatal-and-early-life-triclosan-and-parabens-exposure-and-allergic-outcomes
#12
Kathleen Lee-Sarwar, Russ Hauser, Antonia M Calafat, Xiaoyun Ye, George T O'Connor, Megan Sandel, Leonard B Bacharier, Robert S Zeiger, Nancy Laranjo, Diane R Gold, Scott T Weiss, Augusto A Litonjua, Jessica H Savage
BACKGROUND: In cross-sectional studies, triclosan and parabens, ubiquitous ingredients in personal care and other products, are associated with allergic disease. OBJECTIVES: We investigated the association between prenatal and early life triclosan and parabens exposure and childhood allergic disease in a prospective, longitudinal study. METHODS: Subjects were enrollees in VDAART, the Vitamin D Antenatal Asthma Reduction Trial. Triclosan, methyl paraben and propyl paraben concentrations were quantified in maternal plasma samples pooled from first and third trimesters and urine samples from children at age 3 or 4 years...
October 27, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29109308/triclosan-hazards-of-overuse-are-not-limited-to-antibiotics
#13
Nakul Uppal, Krishnamurthy Bonanthaya
Antibiotic abuse by patients and overprescription by some dentists are problems in modern healthcare practice. Less understood are the deleterious effects of antiseptics in oral care products marketed for routine home use. Ample literature exists to condemn the routine use of mouthrinses, but criticism focuses on alcohol content and its effects on oral mucosa.(1) We highlight the more insidious problem of triclosan, which is added as an antiseptic to toothpastes and mouthrinses.
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29100157/triclosan-induced-transcriptional-and-biochemical-alterations-in-the-freshwater-green-algae-chlamydomonas-reinhardtii
#14
Chang-Gui Pan, Feng-Jiao Peng, Wen-Jun Shi, Li-Xin Hu, Xiao-Dong Wei, Guang-Guo Ying
Triclosan (TCS) is an antibacterial and antifungal agent widely used in personal care products (PCPs). We investigated the effects of TCS (20μg/L, 100μg/L and 500μg/L) on Chlamydomonas reinhardtii by measuring the algal growth, chlorophyll content, lipid peroxidation, and transcription of the antioxidant-related genes (superoxide dismutase (SOD), glutathione peroxidase (GPX), catalase (CAT), glutathione S-transferase (GST), plastid terminal oxidase 2 (PTOX) and thioredoxin (TRX)) as well as biochemical alterations...
October 31, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29096316/degradation-of-triclosan-and-triclocarban-and-formation-of-transformation-products-in-activated-sludge-using-benchtop-bioreactors
#15
Dana L Armstrong, Nuria Lozano, Clifford P Rice, Mark Ramirez, Alba Torrents
Benchtop bioreactors were run aerobically with activated sludge samples collected from a large municipal wastewater treatment plant (WWTP) to understand how increased hydraulic retention time (HRT), sludge retention time (SRT), and varying treatment temperatures (21°C and 30°C) impact concentrations of the endocrine disrupting antimicrobials triclosan (TCS), triclocarban (TCC), and their transformation products. Samples from the reactors were collected periodically over a 122-196h period and the solid and liquid fraction were separately quantitated for TCS, TCC, and methyltriclosan (MeTCS) and scanned qualitatively for six other transformation products...
October 30, 2017: Environmental Research
https://www.readbyqxmd.com/read/29091182/quinolone-resistant-gyrase-mutants-demonstrate-decreased-susceptibility-to-triclosan
#16
Mark A Webber, Michelle M C Buckner, Liam S Redgrave, Gyles Ifill, Lesley A Mitchenall, Carly Webb, Robyn Iddles, Anthony Maxwell, Laura J V Piddock
Objectives: Cross-resistance between antibiotics and biocides is a potentially important driver of MDR. A relationship between susceptibility of Salmonella to quinolones and triclosan has been observed. This study aimed to: (i) investigate the mechanism underpinning this; (ii) determine whether the phenotype is conserved in Escherichia coli; and (iii) evaluate the potential for triclosan to select for quinolone resistance. Methods: WT E. coli, Salmonella enterica serovar Typhimurium and gyrA mutants were used...
October 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29079081/river-export-of-triclosan-from-land-to-sea-a-global-modelling-approach
#17
Jikke van Wijnen, Ad M J Ragas, Carolien Kroeze
Triclosan (TCS) is an antibacterial agent that is added to commonly used personal care products. Emitted to the aquatic environment in large quantities, it poses a potential threat to aquatic organisms. Triclosan enters the aquatic environment mainly through sewage effluent. We developed a global, spatially explicit model, the Global TCS model, to simulate triclosan transport by rivers to coastal areas. With this model we analysed annual, basin-wide triclosan export for the year 2000 and two future scenarios for the year 2050...
October 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29067803/nylon-bristles-and-elastomers-retain-centigram-levels-of-triclosan-and-other-chemicals-from-toothpastes-accumulation-and-uncontrolled-release
#18
Jie Han, Wei Qiu, Elizabeth C Campbell, Jason C White, Baoshan Xing
Triclosan (TCS), a broad-spectrum antimicrobial, is used in commercial toothpastes with reported dental benefits. Our studies on 22 popular manual toothbrushes in the U.S. showed that common toothbrush head components can accumulate substantial amounts of TCS after brushing with TCS-formulated toothpastes (TCS-TPs). After simulated 3-month brushing with a commercial best-selling TCS-TP, over one third of the adults' toothbrushes showed a cumulative TCS uptake of 21-37.5 mg, equivalent to 7-12.5 doses of the TCS used per brushing...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29067681/chitosan-triclosan-particles-modulate-inflammatory-signaling-in-gingival-fibroblasts
#19
L Pavez, N Tobar, C Chacón, R Arancibia, C Martínez, C Tapia, A Pastor, M González, J Martínez, P C Smith
BACKGROUND AND OBJECTIVES: An important goal of periodontal therapy is the modulation of the inflammatory response. To this end, several pharmacological agents have been evaluated. Triclosan corresponds to an antibacterial and anti-inflammatory agent currently used in periodontal therapy. Chitosan is a natural polymer that may act as a drug delivery agent and exerts antibacterial and anti-inflammatory activities. Therefore, an association between both molecules might be useful to prevent inflammation and tissue destruction in periodontal tissues...
October 24, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29054660/estimation-of-intake-and-uptake-of-bisphenols-and-triclosan-from-personal-care-products-by-dermal-contact
#20
Shaoyou Lu, Yuling Yu, Lu Ren, Xiaolan Zhang, Guihua Liu, Yingxin Yu
Increasing concern has been raised in respect of exposure to bisphenols and triclosan (TCS) due to their widespread use. However, little is known about their occurrence in personal care products (PCPs) or, particularly, their dermal uptake following daily application. It is therefore necessary to evaluate the human health risk of bisphenols and TCS via dermal absorption. In this study, 150 PCPs, covering 11 different categories, were collected in China. The concentrations of seven bisphenol analogues and TCS were measured, and the associated human health risks by dermal contact were estimated...
October 17, 2017: Science of the Total Environment
keyword
keyword
101275
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"