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https://www.readbyqxmd.com/read/29374135/sulfenylation-of-human-liver-and-kidney-microsomal-cytochromes-p450-and-other-drug-metabolizing-enzymes-as-a-response-to-redox-alteration
#1
Matt Albertolle, Thanh T N Phan, Ambra Pozzi, F Peter Guengerich
The lumen of the endoplasmic reticulum (ER) provides an oxidizing environment to aid in the formation of disulfide bonds, which is tightly regulated by both antioxidant proteins and small molecules. On the cytoplasmic side of the ER, cytochrome P450 (P450) proteins have been identified as a superfamily of enzymes that are important in the formation of endogenous chemicals as well as in the detoxication of xenobiotics. Our previous report described oxidative inhibition of P450 Family 4 enzymes via oxidation of the heme-thiolate cysteine to a sulfenic acid (-SOH) (Albertolle, M...
January 26, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29366871/cytochrome-p450-1a1-cyp1a1-protects-against-nonalcoholic-fatty-liver-disease-caused-by-western-diet-containing-benzo-a-pyrene-in-mice
#2
Shigeyuki Uno, Daniel W Nebert, Makoto Makishima
The Western diet contributes to nonalcoholic fatty liver disease (NAFLD) pathogenesis. Benzo[a]pyrene (BaP), a prototypical environmental pollutant produced by combustion processes, is present in charcoal-grilled meat. Cytochrome P450 1A1 (CYP1A1) metabolizes BaP, resulting in either detoxication or metabolic activation in a context-dependent manner. To elucidate a role of CYP1A1-BaP in NAFLD pathogenesis, we compared the effects of a Western diet, with or without oral BaP treatment, on the development of NAFLD in Cyp1a1(-/-) mice versus wild-type mice...
January 20, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29362220/integration-of-oncogenes-via-sleeping-beauty-as-a-mouse-model-of-hpv16-oral-tumor-and-immunologic-control
#3
Yi-Hsin Lin, Ming-Chieh Yang, Ssu-Hsueh Tseng, Rosie Jiang, Andrew Yang, Emily Farmer, Shiwen Peng, Talia Henkle, Yung-Nien Chang, Chien-Fu Hung, T-C Wu
Human papillomavirus type 16 (HPV16) is the etiologic factor for cervical cancer and a subset of oropharyngeal cancers. Although several prophylactic HPV vaccines are available, no effective therapeutic strategies to control active HPV diseases exist. Tumor implantation models are traditionally used to study HPV-associated buccal tumors. However, they fail to address precancerous phases of disease progression and display tumor microenvironments distinct from those observed in patients. Previously, K14-E6/E7 transgenic mouse models have been used to generate spontaneous tumors...
January 23, 2018: Cancer Immunology Research
https://www.readbyqxmd.com/read/29325416/igy-reduces-afb1-induced-cytotoxicity-cellular-dysfunction-and-genotoxicity-in-human-l-02-hepatocytes-and-swan-71-trophoblasts
#4
Taotao Qiu, Xing Shen, Zhen Tian, Riming Huang, Xiangmei Li, Juan Wang, Rong Wang, Yuanming Sun, Yiguo Jiang, Huidong Zhang, Hongtao Lei
Aflatoxin B1 (AFB1) causes hepatotoxic, genotoxic, and immuno¬toxic effects in a variety of species. Although various neutralizing agents of AFB1 toxicity have been studied, the egg yolk immunoglobulins (IgY) detoxification of small molecular toxins and the mechanisms underlying such effects have not yet been reported. In this investigation, anti-AFB1 IgY against AFB1 was successfully raised, and a competitive indirect enzyme-linked immunosorbent assay was established with a sensitive half-maximal inhibitory concentration (IC50, 2...
January 11, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29309501/ectopic-expression-of-bdcipk31-confers-enhanced-low-temperature-tolerance-in-transgenic-tobacco-plants
#5
Qingchen Luo, Qiuhui Wei, Ruibin Wang, Yang Zhang, Fan Zhang, Yuan He, Guangxiao Yang, Guangyuan He
Calcineurin B-like protein (CBL), the Ca2+ sensor, and its interacting protein kinases (CIPKs) play essential roles in plants' response to stress. However, few studies have focused on the functions of CIPKs in low-temperature response. In the present study, BdCIPK31, a cold-responsive CIPK in Brachypodium distachyon, was found to participate in low-temperature response. Ectopic expression of BdCIPK31 conferred cold tolerance in transgenic tobaccos. Further analyses indicated that expression of BdCIPK31 improved ROS detoxication and omsoprotectant biosynthesis in transgenic plants under low-temperature treatment, suggesting that the BdCIPK31 functions positively in plant adaption to the cold-induced oxidative and osmotic stresses...
December 22, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29306936/remote-healing-of-bipolar-disorder-eating-disorder-not-otherwise-specified-posttraumatic-stress-disorder-fibromyalgia-and-irritable-bowel-syndrome-through-lifestyle-change
#6
Kelly Brogan
This case report illustrates the relationship between gut, hormonal, and brain function in that dietary change, mindfulness interventions, and detoxification led to resolution of disabling psychiatric symptoms. In this case, a single Caucasian female resolved her symptoms of bipolar disorder (BD) including psychotic features and suicidality, posttraumatic stress disorder symptoms from childhood torture, disordered eating, fibromyalgia, and irritable bowel syndrome through lifestyle interventions. This patient survived a severe trauma history only to develop alcohol dependence, disordered eating, and depressive symptoms, which were treated with a polypharmaceutical psychiatric approach...
October 2017: Advances in Mind-body Medicine
https://www.readbyqxmd.com/read/29302560/benzodiazepine-maintenance-for-alcohol-dependence-a-case-series
#7
Shivanand Kattimani, Balaji Bharadwaj, Anand Babu Arun
Alcohol addiction is a chronic relapsing syndrome. Benzodiazepines remain as the mainstay for detoxification, taking care of the acute withdrawal syndrome. There is fear of dependence and abuse of benzodiazepines on prolonged use. Here, we selectively interviewed ten cases who were on longer duration of benzodiazepines to elicit their potential perceived benefits, attitudes, and any adverse effect. Three patients experienced adverse effects. None of them had features of benzodiazepine dependence. We opine that in select cases, benzodiazepine use should persist beyond detox period, and its benefits continue beyond the acute withdrawal phase while monitoring their safety/adverse effects...
April 2017: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/29290059/does-heavy-metal-exposure-affect-the-condition-of-whitethroat-sylvia-communis-nestlings
#8
Katarzyna Turzańska-Pietras, Justyna Chachulska, Ludmiła Polechońska, Marta Borowiec
Anthropogenic pollution results in high concentrations of heavy metals in the environment. Due to their persistence and a high potential for bioaccumulation, metals are a real threat for birds breeding in industrial areas. The aim of the present study has been to explore the contents of heavy metals (arsenic As, cadmium Cd, chromium Cr, copper Cu, iron Fe, nickel Ni, lead Pb and zinc Zn) in the excreta of Whitethroat (Sylvia communis) nestlings living in polluted environment and to investigate the relationship between these contents and the nestlings' condition...
December 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29290030/use-of-zeolite-to-neutralise-nickel-in-a-soil-environment
#9
Edyta Boros-Lajszner, Jadwiga Wyszkowska, Jan Kucharski
Nickel is a heavy metal which is a stable soil pollutant which is difficult to remediate. An attempt to reduce its impact on the environment can be made by changing its solubility. The right level of hydrogen ions and the content of mineral and organic colloids are crucial in this regard. Therefore, methods to neutralise heavy metals in soil are sought. There are no reports in the literature on the possibility of using minerals in the detoxication of a soil environment contaminated with metals. It is important to fill the gap in research on the effect of zeolites on the microbiological, biochemical and physicochemical properties of soils under pressure from heavy metals...
December 30, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29281794/reduction-and-scavenging-of-chemically-reactive-drug-metabolites-by-nad-p-h-quinone-oxidoreductase-1-and-nrh-quinone-oxidoreductase-2-and-variability-in-hepatic-concentrations
#10
Shalenie P den Braver-Sewradj, Michiel W den Braver, Robin M Toorneman, Stephanie van Leeuwen, Yongjie Zhang, Stefan J Dekker, Nico P E Vermeulen, Jan N M Commandeur, J Chris Vos
Detoxicating enzymes NAD(P)H:quinone oxidoreductase 1 (NQO1) and NRH:quinone oxidoreductase 2 (NQO2) catalyze the two-electron reduction of quinone-like compounds. The protective role of the polymorphic NQO1 and NQO2 enzymes is especially of interest in the liver as the major site of drug bioactivation to chemically reactive drug metabolites. In the current study, we quantified the concentrations of NQO1 and NQO2 in 20 human liver donors and NQO1 and NQO2 activities with quinone-like drug metabolites. Hepatic NQO1 concentrations ranged from 8 to 213 nM...
December 27, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29258441/comparative-transcriptome-analysis-of-glyphodes-pyloalis-walker-lepidoptera-pyralidae-reveals-novel-insights-into-heat-stress-tolerance-in-insects
#11
Yuncai Liu, Hang Su, Rongqiao Li, Xiaotong Li, Yusong Xu, Xiangping Dai, Yanyan Zhou, Huabing Wang
BACKGROUND: Heat tolerance is a key parameter that affects insect distribution and abundance. Glyphodes pyloalis Walker (Lepidoptera: Pyralidae) is a devastating pest of mulberry in the main mulberry-growing regions and can cause tremendous losses to sericulture by directly feeding on mulberry leaves and transmitting viruses to Bombyx mori. Moreover, G. pyloalis shows a prominent capacity for adaptation to daily and seasonal temperature fluctuations and can survive several hours under high temperature...
December 19, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29235299/-prescription-regularity-of-famous-veteran-traditional-chinese-medicine-doctor-yu-guoyou-for-treating-gastrointestinal-failure-based-ondata-mining
#12
Qing Wang, Yi-Lian Chen, Guo-Lin Wu, Fu-Lin Xiong, Guo-You Yu
Gastrointestinal failure is a kind of severe systemic inflammatory response, and often complicated with multiple organ dysfunction syndrome. Integrated traditional Chinese and Western medicine have a better curative effect in treating it. This study collected the famous veteran TCM physician Yu Guoyou's 175 prescriptions for treating 89 cases of gastrointestinal failure, calculated the frequency of traditional Chinese medicines and their categories, and analyzed the medication regularity with system clustering method, so as to summarize Yu's frequently used drugs and prescriptions...
October 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29215843/-influence-of-partial-hepatectomie-on-ammoniumdetoxications-function-of-liver-at-chronic-tetrachlorcarbon-hepatitis
#13
P N Savilov
The purpose. To study the effect of partial hepatectomy (PH) on the main ways of ammonia detoxication in the liver (synthesis of urea and glutamine) in chronic tetrachlorcarbon (CCl4) hepatitis. Methods. The experiments were performed on 165 white outbred rats (females) weighing 180-220 g Chronic CCl4-hepatitis was reproduced by subcutaneous injection of 50% CCl4 solution in olive oil (0.1 ml/100g of body weight,65 days, through the day with two two-week breaks between 6-7 and 13-14 injections). PH conducted electrocautery, removing part of the left lobe of the liver (15-20% by weight of the body) to 65th (and last) day of the introduction of the CCl4...
April 2017: Patologicheskaia Fiziologiia i èksperimental'naia Terapiia
https://www.readbyqxmd.com/read/29204300/yogi-detox-tea-a-potential-cause-of-acute-liver-failure
#14
Keerthana Kesavarapu, Mitchell Kang, Jaewook James Shin, Kenneth Rothstein
We present a case of acute fulminant liver failure from a liver detoxification tea. We present a 60-year-old female with weakness, lethargy, scleral icterus, jaundice, and worsening mental status. She drank herbal tea three times a day for 14 days prior to symptom development. Liver tests were elevated. Remaining laboratory tests and imaging were negative for other etiologies. An ultrasound-guided liver biopsy showed submassive necrosis. A literature search on the ingredients shows six ingredients as having hepatotoxic effects and remaining ingredients as having very sparse hepatoprotective data...
2017: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/29199901/an-evaluation-of-practitioner-s-experience-of-service-users-seeking-community-detoxification-from-benzodiazepines
#15
Marianne Wall, Sharon Lambert, Aidan Horan
A recent report in Ireland identified that two-thirds of poisoning deaths involved poly drug use with an average of four different drugs involved. Of these, benzodiazepines were the most common drug group involved. Concern has been expressed regarding high levels of benzodiazepine prescriptions globally. Community-based detoxification programs are required, but detoxification is complex with associated high risks, such as overdose. This study utilized a survey to gather the experiences of a range of drug workers in addiction settings in the southern region of Ireland who are tasked with the management of supporting service users who wish to detoxify from benzodiazepines...
December 4, 2017: Journal of Psychoactive Drugs
https://www.readbyqxmd.com/read/29191801/inspectors-voice-concern-over-independent-residential-detox-units
#16
Anne Gulland
No abstract text is available yet for this article.
November 30, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/29180167/characterization-of-equine-gst-a3-3-as-a-steroid-isomerase
#17
Helena Lindström, Shawna M Peer, Nancy H Ing, Bengt Mannervik
Glutathione transferases (GSTs) comprise a superfamily of enzymes prominently involved in detoxication by making toxic electrophiles more polar and therefore more easily excretable. However some GSTs have developed alternative functions. Thus, a member of the Alpha class GSTs in pig and human tissues is involved in steroid hormone biosynthesis, catalyzing the obligatory double-bond isomerization of Δ5-androstene-3,17-dione to Δ4-androstene-3,17-dione and of Δ5-pregnene-3,20-dione to Δ4-pregnene-3,20-dione on the biosynthetic pathways to testosterone and progesterone...
November 24, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29135117/what-is-the-connection-between-serum-phosphorus-cancer-and-heroin-a-medical-hypothesis-based-on-observational-studies
#18
Vassilis Kouloulias, Christos-David Papaloucas, Aristofanis Papaloucas
Considering the results of a previous study in which 2321 regular heroin addicts who died without having stopped taking the drug since they had started - from various causes but none from cancer, may mean something. Our first thought was: Can't we hypothesize, reinforcing our previous view that heroin is a "barrier" against cancer and as the user gets in the methadone program he/she lacks the "barrier" and therefore is liable to develop cancer? We have already reported that the amount of blood phosphorus in heroin addicted is significantly lower than in healthy ones...
September 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29132086/strengthening-detoxication-impacts-of-coprinus-comatus-on-nickel-and-fluoranthene-co-contaminated-soil-by-bacterial-inoculation
#19
Xia Tang, Bingxin Liu, Qiusui Deng, Ruitao Zhang, Xue Li, Heng Xu
To develop an efficient and environmental-friendly approach to detoxicate nickel (Ni) and fluoranthene co-contaminated soil, the combined application of Coprinus comatus (C. comatus) with Serratia sp. FFC5 and/or Enterobacter sp. E2 was investigated. The pot experiment tested the influences of bacterial inoculation on the growth of C. comatus, content of Ni in C. comatus, Ni speciation in soil, fluoranthene dissipation, soil enzymatic activities, bacterial population and community structure. With the inoculation of bacteria, the fresh weights of C...
November 10, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29102194/biological-responses-of-neotropical-freshwater-fish-lophiosilurus-alexandri-exposed-to-ammonia-and-nitrite
#20
Márcio José Dos Santos Silva, Franklin Fernando Batista da Costa, Fabiola Paes Leme, Rodrigo Takata, Deliane Cristina Costa, Cristiano Campos Mattioli, Ronald Kennedy Luz, Kleber Campos Miranda-Filho
This study aimed to elucidate the responses of the Neotropical fish Lophiosilurus alexandri exposed to ammonia and nitrite, following a period of recovering. Acute toxicity tests lasted 96h, subchronic toxicity tests lasted eight days and the detoxification trial lasted four days. Groups of 12 juveniles were maintained in 90-L tanks and treated with increasing concentrations of ammonia and nitrite, except during the recovery test. All treatments were performed with two replicates. The median lethal concentrations (LC50) of 24, 48, 72 and 96h were estimated at 30...
October 25, 2017: Science of the Total Environment
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