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Food and Chemical Toxicology

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https://www.readbyqxmd.com/read/28634114/peanut-digestome-identification-of-digestion-resistant-ige-binding-peptides
#1
Luigia Di Stasio, Gianluca Picariello, Mariantonietta Mongiello, Rita Nocerino, Roberto Berni Canani, Simona Bavaro, Linda Monaci, Pasquale Ferranti, Gianfranco Mamone
Stability to proteolytic degradation in the digestive tract is considered a general feature shared by most food allergens. Current digestibility models exclusively utilize purified allergen proteins, neglecting the relevant effects of matrix that occur for foodstuff systems. In the present study, we investigated digestion stability of the major peanut allergens directly in the natural matrix using an in vitro static model that simulates the gastrointestinal digestion including the oral, gastric, duodenal and intestinal (brush border membrane enzymes) phases...
June 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28634113/vitamin-d3-supplementation-attenuates-the-early-stage-of-mouse-hepatocarcinogenesis-promoted-by-hexachlorobenzene-fungicide
#2
Guilherme R Romualdo, Renata L Goto, Ana A H Fernandes, Bruno Cogliati, Luis F Barbisan
Hexachlorobezene (HCB), a fungicide widely distributed in the environment, promotes the development of hepatocellular preneoplastic lesions (PNL) and tumors in rodents. In contrast, vitamin D3 (VD3) supplementation presents a potential role for the prevention/treatment of chronic liver diseases. Thus, we investigated whether VD3 supplementation attenuates the early stage of HCB-promoted hepatocarcinogenesis. Female Balb/C mice were injected a single dose of diethylnitrosamine (DEN, 50 mg/kg) at postnatal day 15...
June 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28634112/concentrations-of-environmental-organic-contaminants-in-meat-and-meat-products-and-human-dietary-exposure-a-review
#3
REVIEW
José L Domingo
Meat and meat products is one of the most relevant food groups in an important number of human diets. Recently, the IARC, based on results of a number of epidemiological studies, classified the consumptions of red meat and processed meat as "probably carcinogenic to humans" and as "carcinogenic to humans", respectively. It was suggested that the substances responsible of the potential carcinogenicity would be mainly generated during meat processing, such as curing and smoking, or when meat is heated at high temperatures...
June 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28634111/levels-of-plasma-selenium-and-urinary-total-arsenic-interact-to-affect-the-risk-for-prostate-cancer
#4
Yu-Mei Hsueh, Chien-Tien Su, Horng-Sheng Shiue, Wei-Jen Chen, Yeong-Shiau Pu, Ying-Chin Lin, Cheng-Shiuan Tsai, Chao-Yuan Huang
This study investigated whether plasma selenium levels modified the risk for prostate cancer (PC) related to arsenic exposure. We conducted a case-control study that included 318 PC patients and 318 age-matched, healthy control subjects. Urinary arsenic profiles were examined using HPLC-HG-AAS and plasma selenium levels were measured by ICP-MS. We found that plasma selenium levels displayed a significant dose-dependent inverse association with PC. The odds ratio (OR) and 95% confidence interval (CI) for PC was 0...
June 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28625879/rifm-fragrance-ingredient-safety-assessment-benzenepropanenitrile-4-ethyl-%C3%AE-%C3%AE-dimethyl-cas-registry-number-134123-93-6
#5
A M Api, D Belsito, D Botelho, D Browne, M Bruze, G A Burton, J Buschmann, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, K Joshi, S La Cava, A Lapczynski, D C Liebler, D O'Brien, R Parakhia, A Patel, T M Penning, G Ritacco, J Romine, D Salvito, T W Schultz, I G Sipes, Y Thakkar, Y Tokura, S Tsang, J Wahler
No abstract text is available yet for this article.
June 15, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28625878/rifm-fragrance-ingredient-safety-assessment-methyl-hexyl-oxo-cyclopentanone-carboxylate-cas-registry-number-37172-53-5
#6
A M Api, D Belsito, S Bhatia, D Botelho, D Browne, M Bruze, G A Burton, J Buschmann, P Calow, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, K Joshi, L Kromidas, S La Cava, J F Lalko, A Lapczynski, D C Liebler, D O'Brien, R Parakhia, A Patel, T M Penning, V T Politano, G Ritacco, J Romine, D Salvito, T W Schultz, J Shen, I G Sipes, Y Thakkar, S Tsang, J Wahler, B Wall, D K Wilcox
No abstract text is available yet for this article.
June 15, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28625877/rifm-fragrance-ingredient-safety-assessment-isodecyl-alcohol-cas-registry-number-25339-17-7
#7
A M Api, D Belsito, D Botelho, D Browne, M Bruze, G A Burton, J Buschmann, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, K Joshi, S La Cava, A Lapczynski, D C Liebler, D O'brien, R Parakhia, A Patel, T M Penning, G Ritacco, J Romine, D Salvito, T W Schultz, I G Sipes, Y Thakkar, Y Tokura, S Tsang, J Wahler
No abstract text is available yet for this article.
June 15, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28595958/olive-phenolic-compounds-attenuate-deltamethrin-induced-liver-and-kidney-toxicity-through-regulating-oxidative-stress-inflammation-and-apoptosis
#8
Amina Maalej, Asma Mahmoudi, Zouhaier Bouallagui, Ines Fki, Rim Marrekchi, Sami Sayadi
The purpose of this study was to evaluate the protective effect of ethanolic olive fruit extract (OFE) and its phenolic compound, oleuropein (OLE), against hepato-renal toxicity induced by deltamethrin (DEM), a synthetic pyrethroid, in Wistar rats. The kidney and liver tissues were collected after 30 days of treatment for subsequent investigation. Rats that were given DEM had a highly significant elevation in the serum biomarkers as well as hepatic and renal levels of lipid peroxidation (MDA). Additionally, a significant reduction in the total antioxidant capacity (ABTS+), superoxide dismutase (SOD) and catalase (CAT) activities was noted...
June 15, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28624472/nonclinical-safety-of-astilbin-a-4-week-oral-toxicity-study-in-rats-with-genotoxicity-chromosomal-aberration-and-mammalian-micronucleus-tests
#9
Yonglin Gao, Chunmei Li, Yunzhi Wang, Yunguo Liu, Guisheng Li, Xiaochen Fan, Yanshen Li, Jingwei Tian, Albert W Lee
Astilbin is an active flavonoid compound isolated from Rhizoma Smilacis Glabrae. It has been widely used as an anti-hepatic, anti-arthritic, and anti-renal injury agent. However, its safety has not yet been established. The objective of this study was to evaluate 4-week repeated oral toxicity and genotoxicity of astilbin. We examined oral toxicity in Sprague-Dawley rats after daily oral administration of astilbin at 50, 150, and 500 mg/kg for 4 weeks. Negative control animals received the same volume of the solvent...
June 14, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28624471/vitamin-e-antagonizes-ozone-induced-asthma-exacerbation-in-balb-c-mice-through-the-nrf2-pathway
#10
Liju Duan, Jinquan Li, Ping Ma, Xu Yang, Shunqing Xu
Millions of people are regularly exposed to ozone, a gas known to contribute significantly to worsening the symptoms of patients with asthma. However, the mechanisms underlying these ozone exacerbation effects are not fully understood. In this study, we examined the exacerbation effect of ozone in OVA-induced asthma mice and tried to demonstrate the protective mechanism of vitamin E (VE). An asthma mouse model was established, and used to identify the exacerbating effects of ozone by assessing cytokine and serum immunoglobulin concentrations, airway leukocyte infiltration, histopathological changes in lung tissues, and airway hyper-responsiveness...
June 14, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28627373/development-and-application-of-a-population-physiologically-based-pharmacokinetic-model-for-penicillin-g-in-swine-and-cattle-for-food-safety-assessment
#11
Miao Li, Ronette Gehring, Jim E Riviere, Zhoumeng Lin
Penicillin G is a widely used antimicrobial in food-producing animals, and one of the most predominant drug residues in animal-derived food products. Due to reduced sensitivity of bacteria to penicillin, extralabel use of penicillin G is common, which may lead to violative residues in edible tissues and cause adverse reactions in consumers. This study aimed to develop a physiologically based pharmacokinetic (PBPK) model to predict drug residues in edible tissues and estimate extended withdrawal intervals for penicillin G in swine and cattle...
June 13, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28595959/cudratricusxanthone-a-attenuates-renal-injury-in-septic-mice
#12
Wonhwa Lee, Yuri Lee, Gil-Saeng Jeong, Sae-Kwang Ku, Jong-Sup Bae
As a natural compound extracted from the roots of Cudrania tricuspidata Bureau, Cudratricusxanthone A (CTXA) is known to possess hepatoprotective, anti-inflammatory, and anti-proliferative activities. This study was aimed to clarify the role of CTXA in modulating renal functional damage in a mouse model of sepsis and to elucidate its underlying mechanisms. We examined the renal protective effects of CTXA on cecal ligation and puncture (CLP)-induced renal damage by assessment of serum creatinine, blood urea nitrogen (BUN), lipid peroxidation, total glutathione, glutathione peroxidase activity, catalase activity, and superoxide dismutase activity...
June 12, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28610741/rifm-fragrance-ingredient-safety-assessment-2-methylbutanol-cas-registry-number-137-32-6
#13
A M Api, D Belsito, S Bhatia, D Botelho, D Browne, M Bruze, P Calow, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, K Joshi, L Kromidas, S L A Cava, J F Lalko, A Lapczynski, D C Liebler, D O'Brien, R Parakhia, A Patel, T M Penning, V T Politano, G Ritacco, J Romine, D Salvito, T W Schultz, J Shen, I G Sipes, Y Thakkar, S Tsang, J Wahler, B Wall, D K Wilcox
No abstract text is available yet for this article.
June 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28610740/toxicity-and-biodistribution-of-orally-administered-casein-nanoparticles
#14
Ana Gloria Gil, Juan Manuel Irache, Iván Peñuelas, Carlos Javier González Navarro, Adela López de Cerain
In the last years, casein nanoparticles have been proposed as carriers for the oral delivery of biologically active compounds. However, till now, no information about their possible specific hazards in vivo was available. The aim of this work was to assess the safety of casein nanoparticles when administered orally to animals through a 90 days dose-repeated toxicity study (OECD guideline 408), that was performed in Wistar rats under GLP conditions. After 90 days, no evidences of significant alterations in animals treated daily with 50, 150 or 500 mg/kg bw of nanoparticles were found...
June 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28606765/genotoxicity-assessment-of-piperitenone-oxide-an-in%C3%A2-vitro-and-in-silico-evaluation
#15
Antonella Di Sotto, Silvia Di Giacomo, Lorena Abete, Mijat Božović, Olga A Parisi, Fabio Barile, Annabella Vitalone, Angelo A Izzo, Rino Ragno, Gabriela Mazzanti
Piperitenone oxide, a natural flavouring agent also known as rotundifolone, has been studied for the genotoxicity assessment by an integrated in vitro and in silico experimental approach, including the bacterial reverse mutation assay, the micronucleus test, the comet assay and the computational prediction by Toxtree and VEGA tools. Under our experimental conditions, the monoterpene showed to induce both point mutations (i.e. frameshift, base-substitution and/or oxidative damage) and DNA damage (i.e. clastogenic or aneuploidic damage, or single-strand breaks)...
June 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28606766/medicinal-species-as-mtdls-turnera-diffusa-willd-ex-schult-inhibits-cns-enzymes-and-delays-glutamate-excitotoxicity-in-sh-sy5y-cells-via-oxidative-damage
#16
João Bernardo, Federico Ferreres, Ángel Gil-Izquierdo, Patrícia Valentão, Paula B Andrade
One of the most promising approaches to confront the complexity of central nervous system disorders are new multi-target directed ligands (MTDLs). Five medicinal species (Cereus grandiflorus (L.) Mill., Hyssopus officinalis L., Acorus calamus L., Silybum marianum L. Gaertn. and Turnera diffusa Willd. Ex Schult), selected for their ethnopharmacological relevance, were object for in vitro screening. The aqueous extract of T. diffusa revealed the strongest neuroactive potential, inhibiting monoamine oxidase-A (IC50 = 129...
June 9, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28606764/transcriptional-profiling-of-male-f344-rats-suggests-the-involvement-of-calcium-signaling-in-the-mode-of-action-of-acrylamide-induced-thyroid-cancer
#17
Nikolai L Chepelev, Rémi Gagné, Timothy Maynor, Byron Kuo, Cheryl A Hobbs, Leslie Recio, Carole L Yauk
Acrylamide (AA) exposure in 2-year cancer bioassays leads to thyroid, but not liver, adenomas and adenocarcinomas in rats. Hypothesized modes of action (MOAs) include genotoxicity/mutagenicity, or thyroid hormone dysregulation. To examine the plausibility of these two, or any alternative MOAs, RNA-sequencing was performed on the thyroids and livers of AA-exposed rats, in parallel with measurement of genotoxicity (blood micronucleus and Pig-a mutant frequency) and serum thyroid hormone levels, following the exposure of male Fischer 344/DuCrl rats to 0...
June 9, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28602857/current-health-risk-assessment-practice-for-dietary-cadmium-data-from-different-countries
#18
REVIEW
Soisungwan Satarug, David A Vesey, Glenda C Gobe
Cadmium (Cd) is an environmental toxicant with high rates of soil-to-plant transference. This makes exposure to Cd through the food-chain contamination a public health concern. Cd accumulates in kidneys, and the most frequently reported adverse effect of long-term Cd intake is injury to kidneys. The FAO/WHO Joint Expert Committee on Food Additives established a tolerable dietary intake level and a threshold to safeguard population health. The FAO/WHO tolerable intake was set at 25 μg per kg body weight per month (58 μg per day for a 70-kg person) with urinary Cd threshold at 5...
June 8, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28602600/influence-of-the-dual-combination-of-silymarin-and-epigallocatechin-gallate-natural-dietary-flavonoids-on-the-pharmacokinetics-of-oxcarbazepine-in-rats
#19
Ana Ferreira, Márcio Rodrigues, Alexandre Marques, Amílcar Falcão, Gilberto Alves
Considering the potential of flavonoids in reversing the P-glycoprotein (P-gp)-mediated multidrug resistance, this work aimed to assess the combined effects of silymarin and (-)-epigallocatechin gallate (EPG) on the pharmacokinetics of the P-gp substrates oxcarbazepine (OXC) and licarbazepine (LIC). Rats were pre-treated intraperitoneally with silymarin (25 mg/kg), EPG (25 mg/kg), silymarin/EPG (12.5/12.5 mg/kg; 6.25/18.75 mg/kg; 18.75/6.25 mg/kg) or verapamil (25 mg/kg, reference P-gp inhibitor) before the intraperitoneal administration of OXC (50 mg/kg)...
June 8, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28602599/silibinin-inhibits-the-fibrotic-responses-induced-by-cigarette-smoke-via-suppression-of-tgf-%C3%AE-1-smad-2-3-signaling
#20
Je-Won Ko, Na-Rae Shin, Sung-Hyeuk Park, In-Chul Lee, Jung-Min Ryu, Ha-Jung Kim, Young-Kwon Cho, Jong-Choon Kim, In-Sik Shin
Cigarette smoke (CS) is generally accepted as a major contributor to chronic obstructive pulmonary disease (COPD) which is characterized by chronic inflammation, fibrotic response, and airway obstruction. In this study, we investigated the preventive effects of silibinin, an active constitute of silymarin on CS and lipopolysaccharide (LPS) exposure-induced fibrotic response. Mice were exposed to CS for 1 h per day (8 cigarettes per day) for 4 weeks. On day 12 and 26, mice were treated with LPS intranasally...
June 8, 2017: Food and Chemical Toxicology
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