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https://www.readbyqxmd.com/read/29145707/relationship-between-testosterone-in-serum-saliva-and-urine-during-treatment-with-intramuscular-testosterone-undecanoate-in-gender-dysphoria-and-male-hypogonadism
#1
Y Lood, E Aardal-Eriksson, C Webe, J Ahlner, B Ekman, J Wahlberg
Long-term testosterone replacement therapy is mainly monitored by trough levels of serum testosterone (S-T), while urinary testosterone (U-T) is used by forensic toxicology to evaluate testosterone doping. Testosterone in saliva (Sal-T) may provide additional information and simplify the sample collection. We aimed to investigate the relationships between testosterone measured in saliva, serum and urine during standard treatment with 1,000 mg testosterone undecanoate (TU) every 12th week during 1 year. This was an observational study...
November 16, 2017: Andrology
https://www.readbyqxmd.com/read/29145636/localization-and-functional-characterization-of-the-p-asn965ser-n965s-abca4-variant-in-mice-reveal-pathogenic-mechanisms-underlying-stargardt-macular-degeneration
#2
Laurie L Molday, Daniel Wahl, Marinko Sarunic, Robert S Molday
ABCA4 is a member of the superfamily of ATP-binding cassette (ABC) proteins that transports N-retinylidene-phosphatidylethanolamine (N-Ret-PE) across outer segment disc membranes thereby facilitating the removal of potentially toxic retinoid compounds from photoreceptor cells. Mutations in the gene encoding ABCA4 are responsible for Stargardt disease (STGD1), an autosomal recessive retinal degenerative disease that causes severe vision loss. To define the molecular basis for STGD1 associated with the p.Asn965Ser (N965S) mutation in the Walker A motif of nucleotide binding domain 1 (NBD1), we generated a p...
November 14, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29145616/variation-in-methylmercury-metabolism-and-elimination-status-mermes-in-humans-following-fish-consumption
#3
Samuel W Caito, Brian P Jackson, Tracy Punshon, Thomas Scrimale, Alex Grier, Steven R Gill, Tanzy M Love, Gene E Watson, Edwin van Wijngaarden, Matthew D Rand
Evaluating the potential for methylmercury (MeHg) toxicity relies on accurately predicting the mercury (Hg) body burden that results from eating fish. Hg body burden is directly determined by the slow elimination kinetics of MeHg in the human body (kel ∼0.014days-1 or t1/2∼ 50days). Existing studies on MeHg half-life in humans demonstrate a wide range values (t1/2 = 30 to > 150days) and has lead to uncertainty in the derivation of a regulatory standard for acceptable daily oral intake. The causes of variation in MeHg toxicokinetics in humans remain little explored...
November 14, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29145614/methionine-and-choline-deficient-mcd-model-in-predicting-adverse-drug-reactions-in-human-nash
#4
Hui Li, Erica Toth, Nathan J Cherrington
In the past few decades, great conceptual and technological advances have been made in the field of toxicology, but animal model-based research still remains one of the most widely-used and readily available tools for furthering our current knowledge. However, animal models are not perfect in predicting all systemic toxicity in humans. Extrapolating animal data to accurately predict human toxicities remains a challenge, and researchers are obligated to question the appropriateness of their chosen animal model...
November 14, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29145602/genotype-based-selection-of-treatment-for-patients-with-advanced-colorectal-cancer-seticc-a-pharmacogenetic-based-randomized-phase-ii-trial
#5
A Abad, E Martínez-Balibrea, J M Viéitez, V A Orduña, P García Alfonso, J L Manzano, B Massutí, M Benavides, A Carrato, M Zanui, J Gallego, C Grávalos, V Conde, M Provencio, M Valladares, R Salazar, J Sastre, C Montagut, F Rivera, E Aranda
Background: There has been little progress toward personalized therapy for patients with metastatic colorectal cancer (mCRC). TYMS-3' untranslated region (UTR) 6 bp ins/del and ERCC1-118C/T polymorphisms were previously reported to facilitate selecting patients for fluoropyrimidine-based treatment in combination with oxaliplatin as first-line therapy. We assessed the utility of these markers in selecting therapy for patients with mCRC. Patients and methods: This randomized, open-label phase II trial compared bevacizumab plus XELOX (control) versus treatment tailored according to TYMS-3'UTR 6 bp ins/del and ERCC1-118C/T polymorphisms...
November 14, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29145543/association-of-ipilimumab-with-safety-and-antitumor-activity-in-women-with-metastatic-or-recurrent-human-papillomavirus-related-cervical-carcinoma
#6
Stephanie Lheureux, Marcus O Butler, Blaise Clarke, Mihaela C Cristea, Lainie P Martin, Katia Tonkin, Gini F Fleming, Anna V Tinker, Hal W Hirte, Daliah Tsoref, Helen Mackay, Neesha C Dhani, Prafull Ghatage, Johanne Weberpals, Stephen Welch, Nhu-An Pham, Vinicius Motta, Valentin Sotov, Lisa Wang, Katherine Karakasis, Smitha Udagani, Suzanne Kamel-Reid, Howard Z Streicher, Patricia Shaw, Amit M Oza
Importance: Based on evidence of human papillomavirus (HPV)-induced immune evasion, immunotherapy may be an attractive strategy in cervical cancer. Ipilimumab is a fully humanized monoclonal antibody that blocks cytotoxic T-lymphocyte antigen-4 (CTLA-4), which acts to downregulate the T-cell immune response. Objective: To assess the safety and antitumor activity of ipilimumab in recurrent cervical cancer. Design, Setting, and Participants: A multicenter trial was designed for patients with metastatic cervical cancer (squamous cell carcinoma or adenocarcinoma) with measurable disease and progression after at least 1 line of platinum chemotherapy...
November 16, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/29145481/amiloride-enhanced-gene-transfection-of-octa-arginine-functionalized-calcium-phosphate-nanoparticles
#7
Juan Ramón Vanegas Sáenz, Taichi Tenkumo, Yuya Kamano, Hiroshi Egusa, Keiichi Sasaki
Nanoparticles represent promising gene delivery systems in biomedicine to facilitate prolonged gene expression with low toxicity compared to viral vectors. Specifically, nanoparticles of calcium phosphate (nCaP), the main inorganic component of human bone, exhibit high biocompatibility and good biodegradability and have been reported to have high affinity for protein or DNA, having thus been used as gene transfer vectors. On the other hand, Octa-arginine (R8), which has a high permeability to cell membrane, has been reported to improve intracellular delivery systems...
2017: PloS One
https://www.readbyqxmd.com/read/29145473/suppression-and-resolution-of-autoimmune-arthritis-by-rhesus-%C3%AE-defensin-1-an-immunomodulatory-macrocyclic-peptide
#8
Justin B Schaal, Dat Q Tran, Akshay Subramanian, Reshma Patel, Teresina Laragione, Kevin D Roberts, Katie Trinh, Prasad Tongaonkar, Patti A Tran, Dmitriy Minond, Gregg B Fields, Paul Beringer, André J Ouellette, Percio S Gulko, Michael E Selsted
θ-defensins constitute a family of macrocyclic peptides expressed exclusively in Old World monkeys. The peptides are pleiotropic effectors of innate immunity, possessing broad spectrum antimicrobial activities and immunoregulatory properties. Here we report that rhesus θ-defensin 1 (RTD-1) is highly effective in arresting and reversing joint disease in a rodent model of rheumatoid arthritis (RA). Parenteral RTD-1 treatment of DA/OlaHsd rats with established pristane-induced arthritis (PIA) rapidly suppressed joint disease progression, restored limb mobility, and preserved normal joint architecture...
2017: PloS One
https://www.readbyqxmd.com/read/29145289/mercury-poisoning-through-intravenous-administration-two-case-reports-with-literature-review
#9
Qiuying Lu, Zilong Liu, Xiaorui Chen
RATIONALE: Metallic mercury poisoning through intravenous injection is rare, especially for a homicide attempt. Diagnosis and treatment of the disease are challenging. PATIENT CONCERNS: A 34-year-old male presented with pyrexia, chill, fatigue, body aches, and pain of the dorsal aspect of right foot. Another case is that of a 29-year-old male who committed suicide by injecting himself metallic mercury 15 g intravenously and presented with dizzy, dyspnea, fatigue, sweatiness, and waist soreness...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145270/study-on-the-adverse-effects-following-chemotherapy-for-breast-cancer-diagnosis-during-pregnancy-the-first-case-report-in-china
#10
Xin Ye, Qi He, Xiaoyun Zhou
RATIONALE: Treatment of breast cancer during pregnancy (BCP) remains a challenge to physicians. Surgery and chemotherapy during pregnancy are widely used for the treatment of BCP. Herein, we reported 3 Chinese patients with BCP who underwent chemotherapy during pregnancy and were followed up for adverse effects. PATIENT CONCERNS: Three female patients (case 1, case 2, and case 3) of 37-, 32-, and 28-year-old with breast masses were enrolled. Case 1 had been pregnant for over 4 months, case 2 over 7 months, and case 3 for 7 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145238/apatinib-in-refractory-radiation-induced-brain-edema-a-case-report
#11
Wei Guo Hu, Yi Ming Weng, Yi Dong, Xiang Pan Li, Qi-Bin Song
RATIONALE: Apatinib is a novel tyrosine kinase inhibitor targeting vascular endothelial growth factor receptor-2, which has observed to be effective and safe in refractory radiation-induced brain edema, like Avastin did. Till now, there is no case report after apatinib came in the market. PATIENT CONCERNS: Two patients who received brain radiotherapy developed clinical manifestations of brain edema, including dizziness, headache, limb activity disorder, and so on...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145191/antioxidants-maintain-cellular-redox-homeostasis-by-elimination-of-reactive-oxygen-species
#12
Long He, Ting He, Shabnam Farrar, Linbao Ji, Tianyi Liu, Xi Ma
Reactive oxygen species (ROS) are produced by living cells as normal cellular metabolic byproduct. Under excessive stress conditions, cells will produce numerous ROS, and the living organisms eventually evolve series of response mechanisms to adapt to the ROS exposure as well as utilize it as the signaling molecules. ROS molecules would trigger oxidative stress in a feedback mechanism involving many biological processes, such as apoptosis, necrosis and autophagy. Growing evidences have suggested that ROS play a critical role as the signaling molecules throughout the entire cell death pathway...
November 17, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29145171/host-target-based-approaches-against-arboviral-diseases
#13
Rebeca Froes Rocha, Juliana Lemos Del Sarto, Rafael Elias Marques, Vivian Vasconcelos Costa, Mauro Martins Teixeira
In the 20th century, socioeconomic and environmental changes facilitated the reintroduction of mosquitoes in developing cities, resulting in the reintroduction of mosquito-borne viral diseases and the dispersal of their causative agents in a worldwide scale. Recurrent outbreaks of arboviral diseases are being reported, even in regions without a previous history of arboviral disease transmission. Of note, arboviral infections represented approximately 30% of all emerging vector-borne diseases of the last decade...
November 27, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/29145169/a-zinc-schiff-base-complex-inhibits-cancer-progression-both-in-vivo-and-in-vitro-by-inducing-apoptosis
#14
Arpita Banerjee, Kaushik Banerjee, Abhinaba Sinha, Satyajit Das, Saikat Majumder, Subrata Majumdar, Soumitra Kumar Choudhuri
Cancer chemotherapy suffers from selectivity and undesired toxicity of the drugs. Since zinc is a biocompatible tracer element and cysteine derivatives are used in cancer chemoprevention, we intend to develop a complex of zinc and cysteine-derivatives as potent, non-toxic anticancer agents. Herein, we synthesized and characterized cysteine based ligand, 2-[(2-Hydroxy-3-methoxy-benzylidene)-amino]-3-mercapto-propionic acid and its Zn-complex, which are found to be non-toxic towards normal human PBMC. Data also revealed that only Zn-complex exhibited remarkable apoptosis in drug-sensitive CCRF-CEM and multidrug-resistant CEM/ADR5000 cancer cells as assessed by MTT, Cell cycle and AnnexinV binding assay...
November 6, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29145160/larval-development-ratio-test-with-the-calanoid-copepod-acartia-tonsa-as-a-new-bioassay-to-assess-marine-sediment-quality
#15
Isabella Buttino, Valentina Vitiello, Simona Macchia, Alice Scuderi, David Pellegrini
The copepod Acartia tonsa was used as a model species to assess marine sediment quality. Acute and chronic bioassays, such as larval development ratio (LDR) and different end-points were evaluated. As a pelagic species, A. tonsa is mainly exposed to water-soluble toxicants and bioassays are commonly performed in seawater. However, an interaction among A. tonsa eggs and the first larval stages with marine sediments might occur in shallow water environments. Here we tested two different LDR protocols by incubating A...
November 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29145145/alleviation-of-ginsenoside-rg1-on-hematopoietic-homeostasis-defects-caused-by-lead-acetate
#16
Shi-Zhong Cai, Yue Zhou, Jun Liu, Cheng-Peng Li, Dao-Yong Jia, Meng-Si Zhang, Ya-Ping Wang
The hematopoietic system is one of the potential targets of lead intoxication. Recognition of the lead-related deleterious outcomes promotes us to explore the potential therapeutic intervention. Here, we show that ginsenoside Rg1 (Rg1), extracted from the Chinese herb Panax ginseng, remarkably ameliorates the lead acetate-caused hematological index distortion as well as advanced hematopoietic stem cells (HSCs) aging and aging associated inflammation response. Specifically, Rg1 administration alleviated the increment of aging associated p53-p21-Rb signaling in aged HSCs induced by lead acetate...
November 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29145144/pyrethroid-pesticide-residues-in-the-global-environment-an-overview
#17
REVIEW
Wangxin Tang, Di Wang, Jiaqi Wang, Zhengwen Wu, Lingyu Li, Mingli Huang, Shaohui Xu, Dongyun Yan
Pyrethroids are synthetic organic insecticides with low mammalian toxicity that are widely used in both rural and urban areas worldwide. After entering the natural environment, pyrethroids circulate among the three phases of solid, liquid, and gas and enter organisms through food chains, resulting in substantial health risks. This review summarized the available studies on pyrethroid residues since 1986 in different media at the global scale and indicated that pyrethroids have been widely detected in a range of environments (including soils, water, sediments, and indoors) and in organisms...
October 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145142/is-ozonation-environmentally-benign-for-reverse-osmosis-concentrate-treatment-four-level-analysis-on-toxicity-reduction-based-on-organic-matter-fractionation
#18
Jingxia Weng, Huichao Jia, Bing Wu, Bingcai Pan
Ozonation is a promising option to treat reverse osmosis concentrate (ROC). However, a systematic understanding and assessment of ozonation on toxicity reduction is insufficient. In this study, ROC sampled from a typical industrial park wastewater treatment plant of China was fractionated into hydrophobic acid (HOA), hydrophobic base (HOB), hydrophobic neutral (HON), and hydrophilic fraction (HI). Systematic bioassays covering bacteria, algae, fish, and human cell lines were conducted to reveal the role of ozonation in toxicity variation of the four ROC fractions...
October 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145136/lead-cadmium-and-arsenic-in-human-milk-and-their-socio-demographic-and-lifestyle-determinants-in-lebanon
#19
Maya Bassil, Farah Daou, Hussein Hassan, Osama Yamani, Joelle Abi Kharma, Zouheir Attieh, Jomana Elaridi
INTRODUCTION: Exposure of newborns to toxic metals is of special interest due to their reported contamination in breast milk and potential harm. The aim of this study was to assess the occurrence and factors associated with lead, cadmium and arsenic contamination in breast milk collected from lactating mothers in Lebanon. METHODS: A total of 74 breast milk samples were collected from primaparas according to guidelines set by the World Health Organization. A survey was administered to determine the demographic and anthropometric characteristics of participating lactating mothers...
October 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145134/comparative-analyses-of-catalytic-degradation-of-pcdd-fs-in-the-laboratory-vs-industrial-conditions
#20
Ming-Xiu Zhan, Jian-Ying Fu, Long-Jie Ji, Ivan Deviatkin, Sheng-Yong Lu
This study investigates the efficiencies and mechanisms of the catalytic degradation of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) first, in simulated laboratory conditions and then, in a commercial municipal solid waste incineration (MSWI) plant. Five commercially available V2O5-WO3/TiO2 (VWTi) catalysts were tested. The degradation efficiency of PCDD/Fs in the simulated flue gas ranged 22.8-91.7% and was generally higher than that in the MSWI flue gas of 8.0-85.4%. The degradation efficiency of PCDD/Fs in the real flue gas of the MSWI plant was largely hindered by the complex composition of the flue gas, which could not be completely reproduced in the simulated laboratory conditions...
October 24, 2017: Chemosphere
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