journal
MENU ▼
Read by QxMD icon Read
search

Toxicological Research

journal
https://www.readbyqxmd.com/read/28133516/evaluation-of-estrogenic-activity-of-extract-from-the-herbal-mixture-cynanchum-wilfordii-hemsley-phlomis-umbrosa-turczaninow-and-angelica-gigas-nakai
#1
Se Jong Kim, Sun Woo Jin, Gi-Ho Lee, Yong An Kim, Hye Gwang Jeong
Hormone replacement therapy (HRT) consists of highly effective prescription medications for treating menopausal symptoms; however, these agents have exhibited side effects including the risk of estrogen-induced carcinogenesis. Therefore, interest in phytotherapy-based materials as a natural source of alternatives to estrogen therapy has increased. However, some of these herbal medicines have been reported to increase the risk of estrogen-induced cancer. Herbal formulations composed of a combination of Cynanchum wilfordii Hemsley (CW), Phlomis umbrosa Turczaninow (PU), and Angelica gigas Nakai (AG) extracts (CPAE) have been used for treating menopausal symptoms...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133515/recognition-of-transmembrane-protein-39a-as-a-tumor-specific-marker-in-brain-tumor
#2
Jisoo Park, Hyunji Lee, Quangdon Tran, Kisun Mun, Dohoon Kim, Youngeun Hong, So Hee Kwon, Derek Brazil, Jongsun Park, Seon-Hwan Kim
Transmembrane protein 39A (TMEM39A) belongs to the TMEM39 family. TMEM39A gene is a susceptibility locus for multiple sclerosis. In addition, TMEM39A seems to be implicated in systemic lupus erythematosus. However, any possible involvement of TMEM39A in cancer remains largely unknown. In the present report, we provide evidence that TMEM39A may play a role in brain tumors. Western blotting using an anti-TMEM39A antibody indicated that TMEM39A was overexpressed in glioblastoma cell lines, including U87-MG and U251-MG...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133514/anti-melanogenic-effect-of-oenothera-laciniata-methanol-extract-in-melan-a-cells
#3
Su Eun Kim, Chae Myoung Lee, Young Chul Kim
We evaluated the antioxidant activity and anti-melanogenic effects of Oenothera laciniata methanol extract (OLME) in vitro by using melan-a cells. The total polyphenol and flavonoid content of OLME was 66.3 and 19.0 mg/g, respectively. The electron-donating ability, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical-scavenging activity, and superoxide dismutase (SOD)-like activity of OLME (500 μg/mL) were 94.5%, 95.6%, and 63.6%, respectively. OLME and arbutin treatment at 50 μg/mL significantly decreased melanin content by 35...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133513/effect-of-vitamin-d3-on-biosynthesis-of-estrogen-in-porcine-granulosa-cells-via-modulation-of-steroidogenic-enzymes
#4
So-Hye Hong, Jae-Eon Lee, Sung-Min An, Ye Young Shin, Dae Youn Hwang, Seung Yun Yang, Seong-Keun Cho, Beum-Soo An
Vitamin D3 is a fat-soluble secosteroid responsible for enhancing intestinal absorption of calcium, iron, and other materials. Vitamin D3 deficiency, therefore, can cause health problems such as metabolic diseases, and bone disorder. Female sex hormones including estrogen and progesterone are biosynthesized mainly in the granulosa cells of ovary. In this study, we isolated granulosa cells from porcine ovary and cultured for the experiments. In order to examine the effect of vitamin D3 on the ovarian granulosa cells, the mRNA and protein levels of genes were analyzed by real-time PCR and Western blot assay...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133512/phototoxicity-evaluation-of-pharmaceutical-substances-with-a-reactive-oxygen-species-assay-using-ultraviolet-a
#5
Yong Sun Lee, Jung-Sun Yi, Hye Rim Lim, Tae Sung Kim, Il Young Ahn, Kyungyuk Ko, JooHwan Kim, Hye-Kyung Park, Soo Jung Sohn, Jong Kwon Lee
With ultraviolet and visible light exposure, some pharmaceutical substances applied systemically or topically may cause phototoxic skin irritation. The major factor in phototoxicity is the generation of reactive oxygen species (ROS) such as singlet oxygen and superoxide anion that cause oxidative damage to DNA, lipids and proteins. Thus, measuring the generation of ROS can predict the phototoxic potential of a given substance indirectly. For this reason, a standard ROS assay (ROS assay) was developed and validated and provides an alternative method for phototoxicity evaluation...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133511/evaluating-the-influence-of-side-stream-cigarette-smoke-at-an-early-stage-of-non-alcoholic-steatohepatitis-progression-in-mice
#6
Jong Won Kim, Hyejin Yun, Seong-Jin Choi, Sang-Hyub Lee, Surim Park, Chae Woong Lim, Kyuhong Lee, Bumseok Kim
Side stream cigarette smoke (SSCS) is known to be as harmful and hazardous to human health as is active smoking. In this study, we investigated the relationship between the exposure to SSCS and its stimulatory and subacute effects on the progression of non-alcoholic steatohepatitis (NASH). A methionine and choline-deficient plus high fat (MCDHF) diet was administered to C57BL/6 mice for 6 weeks. During the first three weeks of MCDHF diet feeding, each diet group was exposed to SSCS (0, 20, 40 μg/L) or fresh air for 2 hrs per day and 5 days per week...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133510/investigation-of-the-regulatory-effects-of-saccharin-on-cytochrome-p450s-in-male-icr-mice
#7
Jun Hyeon Jo, Sunjoo Kim, Tae Won Jeon, Tae Cheon Jeong, Sangkyu Lee
Saccharin, the first artificial sweetener, was discovered in 1879 that do not have any calories and is approximately 200~700 times sweeter than sugar. Saccharin was the most common domestically produced sweetener in Korea in 2010, and it has been used as an alternative to sugar in many products. The interaction between artificial sweeteners and drugs may affect the drug metabolism in patients with diabetes, cancer, and liver damage, this interaction has not been clarified thus far. Here, we examined the effects of the potential saccharin-drug interaction on the activities of 5 cytochrome P450 (CYPs) in male ICR mice; further, we examined the effects of saccharin (4,000 mg/kg) on the pharmacokinetics of bupropion after pretreatment of mice with saccharin for 7 days and after concomitant administration of bupropion and saccharin...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133509/subchronic-oral-toxicity-study-of-acanthopanax-divaricatus-var-albeofructus-in-rats
#8
Myoung Jun Kim, Mi Ju Lee, Yong-Hoon Lee, Sun Hee Park, Duyeol Kim, Cheol Beom Park, Jin Seok Kang, Jong-Koo Kang
Acanthopanax divaricatus (Siebold & Zucc.) Seem. var. albeofructus (ADA), a traditional medical herb, has been used to treat arthritis and muscular injury, to strengthen muscle and bone, and to get vital energy. However, information regarding its toxicity is limited. ADA was administered by oral gavage to groups of rats at doses of 0 (control), 1,000, 1,500, 2,000, 2,500, and 3,000 mg/kg five times per week for 13 weeks. Mortality, clinical signs, body weights, food consumption, hematology, serum chemistry, urinalysis, organ weights, necropsy, histopathological finding, vaginal cytology, and sperm morphology were compared between control and ADA-treated groups...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133508/effects-of-didecyldimethylammonium-chloride-ddac-on-sprague-dawley-rats-after-13-weeks-of-inhalation-exposure
#9
Yong-Soon Kim, Sung-Bae Lee, Cheol-Hong Lim
Didecyldimethylammonium chloride (DDAC) is used in many types of biocidal products including tableware, carpets, humidifiers, and swimming pools, etc. In spite of increased chances of DDAC exposure through inhalation, studies on the inhalation toxicity of DDAC are not common even though the toxicity of DDAC might be significantly higher if it were to be administered through routes other than the respiratory system. DDAC aerosols were exposed to Sprague-Dawley rats in whole body exposure chambers for a duration of 13 weeks...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/28133507/oxidative-stress-nrf2-and-epigenetic-modification-contribute-to-anticancer-drug-resistance
#10
REVIEW
Kyoung Ah Kang, Jin Won Hyun
Nuclear factor E2-related factor 2 (Nrf2), a transcription factor, controls the expression of genes encoding cytoprotective proteins, including antioxidant enzymes that combat oxidative and electrophilic stress to maintain redox homeostasis. However, recent studies demonstrated that, in cancer, aberrant activation of Nrf2 by epigenetic alterations promotes high expression of cytoprotective proteins, which can decrease the efficacy of anticancer drugs used for chemotherapy. In this review, we summarize recent findings regarding the relationship between oxidative stress, Nrf2, epigenetic modification, and anticancer drug resistance, which should aid in development of new strategies to improve chemotherapeutic efficacy...
January 2017: Toxicological Research
https://www.readbyqxmd.com/read/27818739/erratum-to-propolis-inhibits-neurite-outgrowth-in-differentiating-sh-sy5y-human-neuroblastoma-cells-toxicol-res-32-2016-239-243
#11
Han Bit Kim, Byung Sun Yoo
[This corrects the article on p. 239 in vol. 32, PMID: 27437091.].
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818738/differential-effects-between-cigarette-total-particulate-matter-and-cigarette-smoke-extract-on-blood-and-blood-vessel
#12
Jung-Min Park, Kyung-Hwa Chang, Kwang-Hoon Park, Seong-Jin Choi, Kyuhong Lee, Jin-Yong Lee, Masahiko Satoh, Seong-Yu Song, Moo-Yeol Lee
The generation and collection of cigarette smoke (CS) is a prerequisite for any toxicology study on smoking, especially an in vitro CS exposure study. In this study, the effects on blood and vascular function were tested with two widely used CS preparations to compare the biological effects of CS with respect to the CS preparation used. CS was prepared in the form of total particulate matter (TPM), which is CS trapped in a Cambridge filter pad, and cigarette smoke extract (CSE), which is CS trapped in phosphate-buffered saline...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818737/propolis-inhibits-uva-induced-apoptosis-of-human-keratinocyte-hacat-cells-by-scavenging-ros
#13
Han Bit Kim, Byung Sun Yoo
Propolis is a resinous material collected by honeybees from several plant sources. This research aimed at showing its protective effect against UVA-induced apoptosis of human keratinocyte HaCaT cells. Using Hoechst staining, it was demonstrated that propolis (5 and 10 μg/mL) significantly inhibited the apoptosis of HaCaT cells induced by UVA-irradiation. Propolis also showed the protective effect against loss of mitochondrial membrane potential induced by UVA-irradiaiton in HaCaT cells. Propolis also inhibited the expression of activated caspase-3 induced by UVA-irradiation...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818736/combined-toxic-effects-of-polar-and-nonpolar-chemicals-on-human-hepatocytes-hepg2-cells-by-quantitative-property-activity-relationship-modeling
#14
Ki-Woong Kim, Yong Lim Won, Dong Jin Park, Young Sun Kim, Eun Sil Jin, Sung Kwang Lee
We determined the toxicity of mixtures of ethyl acetate (EA), isopropyl alcohol (IPA), methyl ethyl ketone (MEK), toluene (TOL) and xylene (XYL) with half-maximal effective concentration (EC50) values obtained using human hepatocytes cells. According to these data, quantitative property-activity relationships (QPAR) models were successfully proposed to predict the toxicity of mixtures by multiple linear regressions (MLR). The leave-one-out cross validation method was used to find the best subsets of descriptors in the learning methods...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818735/reproductive-and-developmental-toxicity-screening-test-of-ethyl-hydrogen-adipate-in-rats
#15
Chunja Nam, Jae-Sik Hwang, Kyoung-Goo Han, Eunhye Jo, Sun-Kyoung Yoo, Ig-Chun Eom, Jong-Koo Kang
This study aimed to evaluate the potential toxicity and safety of ethyl hydrogen adipate (EHA) by determining its effect on the reproductive function and development of Sprague-Dawley (SD) rats at dose levels of 0 (control), 200, 400, and 800 mg/kg/day. One male and five females of the 800 mg/kg/day died. Body weight loss was observed in the males of the 800 mg/kg/day and in females of the 400 and 800 mg/kg/day. In addition, mating indices decreased and pre-implantation loss rates increased in parental animals of the 400 and 800 mg/kg/day...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818734/coconut-oil-extract-mitigates-testicular-injury-following-adjuvant-treatment-with-antiretroviral-drugs
#16
Oluwatosin O Ogedengbe, Ayoola I Jegede, Ismail O Onanuga, Ugochukwu Offor, Edwin Cs Naidu, Aniekan I Peter, Onyemaechi O Azu
Increased access to highly active antiretroviral therapy (HAART) has made the management of drug toxicities an increasingly crucial component of HIV. This study investigated the effects of adjuvant use of coconut oil and HAART on testicular morphology and seminal parameters in Sprague- Dawley rats. Twelve adult male Sprague-Dawley rats, weighing 153~169 g were distributed into four groups (A-D) and treated as follows: A served as control (distilled water); B (HAART cocktail- Zidovudine, Lamivudine and Nevirapine); C (HAART + Virgin coconut oil 10 mL/kg) and D (Virgin coconut oil 10 mL/kg)...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818733/skin-corrosion-and-irritation-test-of-nanoparticles-using-reconstructed-three-dimensional-human-skin-model-epiderm-tm
#17
Hyejin Kim, Jonghye Choi, Handule Lee, Juyoung Park, Byung-Il Yoon, Seon Mi Jin, Kwangsik Park
Effects of nanoparticles (NPs) on skin corrosion and irritation using three-dimensional human skin models were investigated based on the test guidelines of Organization for Economic Co-operation and Development (OECD TG431 and TG439). EpiDerm(TM) skin was incubated with NPs including those harboring iron (FeNPs), aluminum oxide (AlNPs), titanium oxide (TNPs), and silver (AgNPs) for a defined time according to the test guidelines. Cell viabilities of EpiDerm(TM) skins were measured by the 3-(4, 5-dimethylthi-azol-2-yl)-2...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818732/evaluation-of-some-biochemical-parameters-and-brain-oxidative-stress-in-experimental-rats-exposed-chronically-to-silver-nitrate-and-the-protective-role-of-vitamin-e-and-selenium
#18
Mouna Gueroui, Zine Kechrid
Due to undesirable hazardous interactions with biological systems, this investigation was undertaken to evaluate the effect of chronic exposure to silver on certain biochemical and some oxidative stress parameters with histopathological examination of brain, as well as the possible protective role of selenium and/or vitamin E as nutritional supplements. Thirty six male rats were divided into six groups of six each: the first group used as a control group. Group II given both vitamin E (400 mg/kg) of diet and selenium (Se) (1 mg/L) in their drinking water...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818731/prediction-of-non-genotoxic-carcinogenicity-based-on-genetic-profiles-of-short-term-exposure-assays
#19
Luis Orlando Pérez, Rolando González-José, Pilar Peral García
Non-genotoxic carcinogens are substances that induce tumorigenesis by non-mutagenic mechanisms and long term rodent bioassays are required to identify them. Recent studies have shown that transcription profiling can be applied to develop early identifiers for long term phenotypes. In this study, we used rat liver expression profiles from the NTP (National Toxicology Program, Research Triangle Park, USA) DrugMatrix Database to construct a gene classifier that can distinguish between non-genotoxic carcinogens and other chemicals...
October 2016: Toxicological Research
https://www.readbyqxmd.com/read/27818730/effect-of-lead-exposure-on-the-status-of-reticulocyte-count-indices-among-workers-from-lead-battery-manufacturing-plant
#20
Ravibabu Kalahasthi, Tapu Barman
Earlier studies conducted on lead-exposed workers have determined the reticulocyte count (RC) (%), but the parameters of Absolute Reticulocyte Count (ARC), Reticulocyte Index (RI), and Reticulocyte Production Index (RPI) were not reported. This study assessed the effect of lead (Pb) exposure on the status of reticulocyte count indices in workers occupied in lead battery plants. The present cross-sectional study was carried out on 391 male lead battery workers. The blood lead levels (BLL) were determined by using an Atomic Absorption Spectrophotometer...
October 2016: Toxicological Research
journal
journal
47800
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"