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https://www.readbyqxmd.com/read/29149702/an-hplc-tandem-mass-spectrometry-for-quantification-of-et-26-hcl-and-its-major-metabolite-in-plasma-and-application-to-a-pharmacokinetic-study-in-rats
#1
Xu Chen, Wensheng Zhang, Sandy Rios, Miriam B Morkos, Xiaoli Ye, Gen Li, Xuehua Jiang, Zhijun Wang, Ling Wang
ET-26-HCl is a new analog of etomidate, a short-acting anesthetic drug, with less adrenal cortex inhibition. The pharmacokinetics of ET-26-HCl in rats needs to be determined for future clinical trials in human subjects. In order to facilitate the pharmacokinetic study, a liquid chromatography based tandem mass spectrometric (HPLC-MS/MS) method was developed and validated for quantification of ET-26-HCl and its major metabolite, ET-26-acid. These two compounds and gabapentin (internal standard) were extracted using a protein precipitation method with methanol and detected by Multiple Reaction Monitoring of m/z transition of 275...
November 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29132028/dna-methylation-and-genetic-variation-of-the-angiotensin-converting-enzyme-ace-in-depression
#2
Dilys Lam, Marie-Laure Ancelin, Karen Ritchie, Richard Saffery, Joanne Ryan
BACKGROUND: Depression is one of the most prevalent psychiatric disorders, and in older persons is associated with high levels of comorbidity and under-treatment. Dysfunction of the hypothalamic-pituitary-adrenal (HPA) stress axis is consistently observed in the older population as well as depressed patients, with the angiotensin converting enzyme (ACE) a key regulator of the stress response. Epigenetic regulation of ACE may play an important role in HPA axis (dys)regulation. OBJECTIVE: To investigate ACE promoter methylation as a biomarker of late-life depression, and its association with genetic variation and cortisol secretion...
November 8, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29106702/hypothalamic-pituitary-adrenal-hpa-axis-suppression-after-treatment-with-glucocorticoid-therapy-for-childhood-acute-lymphoblastic-leukaemia
#3
REVIEW
Niki Rensen, Reinoud Jbj Gemke, Elvira C van Dalen, Joost Rotteveel, Gertjan Jl Kaspers
BACKGROUND: Glucocorticoids play a major role in the treatment of acute lymphoblastic leukaemia (ALL). However, supraphysiological doses can suppress the hypothalamic-pituitary-adrenal (HPA) axis. HPA axis suppression resulting in reduced cortisol response may cause an impaired stress response and an inadequate host defence against infection, which remain a cause of morbidity and death. Suppression commonly occurs in the first days after cessation of glucocorticoid therapy, but the exact duration is unclear...
November 6, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29075302/biatractylolide-modulates-pi3k-akt-gsk3%C3%AE-dependent-pathways-to-protect-against-glutamate-induced-cell-damage-in-pc12-and-sh-sy5y-cells
#4
Li Zhu, Ning Ning, Yu Li, Qiu-Fang Zhang, Yong-Chao Xie, Maida Irshad, Xing Feng, Xiao-Jun Tao
Biatractylolide, isolated from the ethyl acetate extract of Atractylodes macrocephala, has shown various pharmacological activities such as antitumor and antioxidant activities. In this work, we aim to study the protective effect of biatractylolide on glutamate-induced rat adrenal pheochromocytoma cell (PC12) and human bone marrow neuroblastoma cell line (SH-SY5Y) injury and preliminarily explore its mechanism. The results showed that glutamate was cytotoxic with an inhibitory concentration 50% (IC50) of 8...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29049934/molecular-changes-associated-with-escitalopram-response-in-a-stress-based-model-of-depression
#5
Cristina Benatti, Silvia Alboni, Joan M C Blom, Julien Mendlewicz, Fabio Tascedda, Nicoletta Brunello
Converging evidence points at hypothalamus-pituitary-adrenal (HPA) axis hyperactivity and neuroinflammation as important factors involved in the etiopathogenesis of major depressive disorder (MDD) and in therapeutic efficacy of antidepressants. In this study, we examined the molecular effects associated with a response to a week-long treatment with escitalopram in the chronic escape deficit (CED) model, a validated model of depression based on the induction of an escape deficit after exposure of rats to an unavoidable stress...
October 13, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29026518/castleman-s-disease-a-rare-presentation-in-a-retroperitoneal-accessory-spleen-treated-with-a-minimally-invasive-robotic-approach
#6
Fabio Sbrana, Dimin Zhou, Ina Zamfirova, Nathaniel Leonardi
Unicentric Castleman's disease (UCD) is a rare disorder of unknown etiology characterized by localized lymphoid tissue proliferation and interfollicular hypervascularity. A 33-year-old Caucasian female presented with vague abdominal discomfort and pain with pressure. Ultrasound and computed tomography detected a large peripancreatic mass. Robotic-assisted resection of the mass along with en bloc dissection of the encased left adrenal gland was done. Frozen section examination confirmed UCD hyaline vascular variant in a retroperitoneal accessory spleen...
October 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28982516/robotic-assisted-thoracoscopic-transdiaphragmatic-adrenalectomy-ratta-for-metastatic-renal-cell-carcinoma
#7
Christopher M Russell, Simpa S Salami, Amir H Lebastchi, Kiran H Lagisetty, Rohit Mehra, Khaled S Hafez, Rishindra M Reddy, Alon Z Weizer
OBJECTIVE: Robotic-assisted thoracoscopic transdiaphragmatic adrenalectomy (RATTA) represents a novel surgical approach for the management of adrenal pathology in patients with a history of extensive transperitoneal or retroperitoneal procedures. METHODS: Here we report the first described case of RATTA in a 56-year-old woman with metastatic renal cell carcinoma to the left adrenal gland and right lung. With the assistance of cardiothoracic surgery, this patient underwent robotic-assisted thoracoscopic pulmonary wedge resection and RATTA...
July 2017: Urology
https://www.readbyqxmd.com/read/28973656/incidence-of-endocrine-dysfunction-following-the-use-of-different-immune-checkpoint-inhibitor-regimens-a-systematic-review-and-meta-analysis
#8
Romualdo Barroso-Sousa, William T Barry, Ana C Garrido-Castro, F Stephen Hodi, Le Min, Ian E Krop, Sara M Tolaney
Importance: If not promptly recognized, endocrine dysfunction can be life threatening. The incidence and risk of developing such adverse events (AEs) following the use of immune checkpoint inhibitor (ICI) regimens are unknown. Objective: To compare the incidence and risk of endocrine AEs following treatment with US Food and Drug Administration-approved ICI regimens. Data Sources: A PubMed search through July 18, 2016, using the following keywords was performed: "ipilimumab," "MDX-010," "nivolumab," "BMS-963558," "pembrolizumab," "MK-3475," "atezolizumab," "MPDL3280A," and "phase...
September 28, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28965608/-67-ga-as-a-biosensor-of-iron-needs-in-different-organs-study-performed-on-male-and-female-rats-subjected-to-iron-deficiency-and-exercise
#9
Patricia Vieyra-Reyes, Rigoberto Oros-Pantoja, Eugenio Torres-García, Agustín Gutiérrez-Ruiz, Jonathan Pérez-Honorato
The aim of the present study was to determine the iron needs in different organs and tissues using (67)Ga as a biosensor in males and females rats subjected to iron deficiency (ID) and voluntary exercise (EX). (67)Ga citrate was injected i.p. to female and male Wistar rats (n=5/sex/group). Groups: Control (sedentary conditions), Control+EX, ID and ID+EX. To determine the (67)Ga uptake, samples from the following regions of interest (ROIs) were extracted 12h post-injection: blood, liver, gonads, bone marrow, heart, adrenal glands, skeletal muscle, stomach, kidney, eyeball, sciatic nerve, small intestine and peritoneum...
December 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28963986/a-systematic-review-of-allostatic-load-in-relation-to-socioeconomic-position-poor-fidelity-and-major-inconsistencies-in-biomarkers-employed
#10
REVIEW
Sarah C Johnson, Francesca L Cavallaro, David A Leon
BACKGROUND: The association between disease and socioeconomic position (SEP) is well established. Allostatic load (AL), or physiological 'wear and tear', is a concept that aims to elucidate the biological consequences of stress that may underlie these associations. The primary objective of this paper is to review the biomarkers and methods used to operationalise the concept of AL in studies analysing the association between AL and SEP. METHODS: Four databases (Embase, Global Health, MEDLINE, and PsychINFO) were searched using terms related to AL, biomarkers and SEP...
September 19, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28962180/preventive-effects-of-polygonum-multiflorum-on-glucocorticoid-induced-osteoporosis-in-rats
#11
Manru Zhou, Jin Li, Jingkai Wu, Yajun Yang, Xiaobing Zeng, Xiaohua Lv, Liao Cui, Weimin Yao, Yuyu Liu
In Traditional Chinese Medicine, Polygonum multiflorum (PM) is known for its anti-aging properties. A previous study by our group showed that extracts of PM were able to prevent and treat bone loss in vivo, and the active components emodin and 2,3,5,4,-tetrahydroxystilbene-2-O-β-glucoside (TSG) promoted the osteogenic differentiation of mesenchymal stem cells in vitro. The aim of the present study was to investigate the preventive effects of PM on glucocorticoid-induced osteoporosis (GIO) in rats. A crude extract of PM was prepared with 75% ethanol, purified and enriched using a D-101 macroresin column and elution with 30% ethanol, and the material obtained was assessed by high-performance liquid chromatography...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28918192/dielectric-properties-of-isolated-adrenal-chromaffin-cells-determined-by-microfluidic-impedance-spectroscopy
#12
A C Sabuncu, M Stacey, G L Craviso, N Semenova, P T Vernier, N Leblanc, I Chatterjee, J Zaklit
Knowledge of the dielectric properties of biological cells plays an important role in numerical models aimed at understanding how high intensity ultrashort nanosecond electric pulses affect the plasma membrane and the membranes of intracellular organelles. To this end, using electrical impedance spectroscopy, the dielectric properties of isolated, neuroendocrine adrenal chromaffin cells were obtained. Measured impedance data of the cell suspension, acquired between 1kHz and 20MHz, were fit into a combination of constant phase element and Cole-Cole models from which the effect of electrode polarization was extracted...
September 5, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28898882/hospitalisation-in-children-with-adrenal-insufficiency-and-hypopituitarism-is-there-a-differential-burden-between-boys-and-girls-and-between-age-groups
#13
R Louise Rushworth, Georgina L Chrisp, Benjamin Dean, Henrik Falhammar, David J Torpy
BACKGROUND/AIMS: To determine the burden of hospitalisation in children with adrenal insufficiency (AI)/hypopituitarism in Australia. METHODS: A retrospective study of Australian hospitalisation data. All admissions between 2001 and 2014 for patients aged 0-19 years with a principal diagnosis of AI/hypopituitarism were included. Denominator populations were extracted from national statistics datasets. RESULTS: There were 3,779 admissions for treatment of AI/hypopituitarism in patients aged 0-19 years, corresponding to an average admission rate of 48...
2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28892307/purification-of-polysaccharide-from-artificially-cultivated-anoectochilus-roxburghii-wall-lindl-by-high-speed-counter-current-chromatography-and-its-antitumor-activity
#14
Xiaoling Yu, Shouer Lin, Jinque Zhang, Liying Huang, Hong Yao, Shaoguang Li
To establish a systematic method for the extraction, purification, characterization and antitumor activity study of polysaccharide from artificially cultivated Anoectochilus roxburghii (wall.) Lindl. (AC-ARPS). High-speed counter current chromatography with two-phase aqueous systems was successfully applied to purify AC-ARPS after one-step separation. The purity of the AC-ARPS obtained by phenol/sulfuric acid method was 95.01%. The chemical structures of AC-ARPS were identified by a series of analytical methods including high-performance liquid chromatography and liquid chromatography with mass spectrometry...
September 11, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28890136/identification-of-lipidomic-markers-of-chronic-3-3-4-4-5-pentachlorobiphenyl-pcb-126-exposure-in-the-male-rat-liver
#15
Izabela Kania-Korwel, Xianai Wu, Kai Wang, Hans-Joachim Lehmler
Exposure to PCB 126, an environmentally relevant aryl hydrocarbon receptor agonist, is an environmental factor causing hepatic steatosis in rodent models; however, the lipidome of PCB 126-exposed rats has not been investigated in-depth. The objective of the present study was therefore to characterize dose-dependent changes in the lipid profile in the liver of male Sprague-Dawley rats exposed to PCB 126. Rats were exposed for three month to intraperitoneal injections of 0.01, 0.05 and 0.2μmol/kg bw PCB 126 in corn oil...
September 1, 2017: Toxicology
https://www.readbyqxmd.com/read/28844422/dietary-supplementation-with-essence-of-chicken-enhances-daily-oscillations-in-plasma-glucocorticoid-levels-and-behavioral-adaptation-to-the-phase-shifted-environmental-light-dark-cycle-in-mice
#16
Adila Dilixiati, Satoru Koyanagi, Naoki Kusunose, Naoya Matsunaga, Shigehiro Ohdo
Maintenance of circadian rhythms is essential to many aspects of human health, including metabolism and neurological and psychiatric well-being. Chronic disruption of circadian clock function is implicated in increasing the risk of metabolic syndrome, cardiovascular events and development of cancers. However, there are little approaches to reinforce the function of circadian clock for prevention of these diseases. Essence of Chicken (EC) is a nutritional supplement that is traditionally made by extracting water soluble substances derived from cooking the whole chicken...
August 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28800344/automatic-computer-aided-analysis-algorithms-and-system-for-adrenal-tumors-on-ct-images
#17
Hanchao Chai, Yi Guo, Yuanyuan Wang, Guohui Zhou
BACKGROUND: The adrenal tumor will disturb the secreting function of adrenocortical cells, leading to many diseases. Different kinds of adrenal tumors require different therapeutic schedules. OBJECTIVE: In the practical diagnosis, it highly relies on the doctor's experience to judge the tumor type by reading the hundreds of CT images. METHODS: This paper proposed an automatic computer aided analysis method for adrenal tumors detection and classification...
August 4, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28793336/a-systematic-review-of-adverse-drug-events-associated-with-administration-of-common-asthma-medications-in-children
#18
REVIEW
James S Leung, David W Johnson, Arissa J Sperou, Jennifer Crotts, Erik Saude, Lisa Hartling, Antonia Stang
OBJECTIVE: To systematically review the literature and determine frequencies of adverse drug events (ADE) associated with pediatric asthma medications. METHODS: Following PRISMA guidelines, we systematically searched six bibliographic databases between January 1991 and January 2017. Study eligibility, data extraction and quality assessment were independently completed and verified by two reviewers. We included randomized control trials (RCT), case-control, cohort, or quasi-experimental studies where the primary objective was identifying ADE in children 1 month- 18 years old exposed to commercial asthma medications...
2017: PloS One
https://www.readbyqxmd.com/read/28777968/incorporation-of-14-c-cholesterol-in-human-adrenal-corticocarcinoma-h295r-cell-line-and-online-radiodetection-of-produced-14-c-steroid-hormone-metabolites
#19
Jonas Abdel-Khalik, Erland Björklund, Frederik Knud Nielsen, Martin Hansen
This study demonstrates the addition of (14)C-cholesterol to the human cell line H295R will in-situ form radiolabeled steroid hormones allowing for new mechanistic and metabolic insights. The aim of the present study was to in-situ radiolabel steroid hormones from cell line-incorporated (14)C-cholesterol using the OECD guideline 456, H295R steroidogenesis in-vitro assay. Radiodetection of the steroid metabolites of the steroidogenic pathway allows for an improved understanding of the various enzymatic mechanisms involved without necessarily being dependent on quantification...
October 25, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28776368/selective-amperometric-recording-of-endogenous-ascorbate-secretion-from-a-single-rat-adrenal-chromaffin-cell-with-pretreated-carbon-fiber-microelectrodes
#20
Kai Wang, Tongfang Xiao, Qingwei Yue, Fei Wu, Ping Yu, Lanqun Mao
Quantitative description of ascorbate secretion at a single-cell level is of great importance in physiological studies; however, most studies on the ascorbate secretion have so far been performed through analyzing cell extracts with high performance liquid chromatography, which lacks time resolution and analytical performance on a single-cell level. This study demonstrates a single-cell amperometry with carbon fiber microelectrodes (CFEs) to selectively monitor amperometric vesicular secretion of endogenous ascorbate from a single rat adrenal chromaffin cell...
September 5, 2017: Analytical Chemistry
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