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https://www.readbyqxmd.com/read/28437784/the-physiology-of-childhood-growth-hormonal-regulation
#1
Emelie Benyi, Lars Sävendahl
The growth patterns of a child changes from uterine life until the end of puberty. Height velocity is highest in utero and declines after birth until puberty when it rises again. Important hormonal regulators of childhood growth are growth hormone, insulin-like growth factor 1, sex steroids, and thyroid hormone. This review gives an overview of these hormonal regulators of growth and their interplay with nutrition and other key players such as inflammatory cytokines.
April 24, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28437776/large-scale-seaweed-cultivation-diverges-water-and-sediment-microbial-communities-in-the-coast-of-nan-ao-island-south-china-sea
#2
Xinfei Xie, Zhili He, Xiaojuan Hu, Huaqun Yin, Xueduan Liu, Yufeng Yang
Seaweed cultivation not only provides economy benefits, but also remediates the environment contaminated by mariculture of animals (e.g., fish, shrimps). However, the response of microbial communities to seaweed cultivation is poorly understood. In this study, we analyzed the diversity, composition, and structure of water and sediment microbial communities at a seaweed, Gracilaria lemaneiformis, cultivation zone and a control zone near Nan'ao Island, South China Sea by MiSeq sequencing of 16S rRNA gene amplicons...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28437753/p-gp-modulatory-acetyl-11-keto-%C3%AE-boswellic-acid-based-nanoemulsified-carrier-system-for-augmented-oral-chemotherapy-of-docetaxel
#3
Gitu Pandey, Naresh Mittapelly, Guru Raghavendra Valicherla, Ravi Prakash Shukla, Shweta Sharma, Venkatesh Teja Banala, Sandeep Urandur, Arun Kumar Jajoriya, Kalyan Mitra, D P Mishra, J R Gayen, P R Mishra
In spite of being a very potent and promising drug against many types of cancer, docetaxel suffers the disadvantage of low solubility and poor bioavailability rendering it unsuitable for oral administration. Also, the available marketed formulation for intravenous administration has its inherent drawbacks owing to the presence of polysorbate 80. Here, we exploited the anticancer and P-gp inhibitory potential of naturally occurring frankincense oil to fabricate a stable docetaxel loaded nanoemulsified carrier system for oral delivery...
April 15, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28437722/effective-active-vaccination-against-methamphetamine-in-female-rats
#4
J D Nguyen, P T Bremer, C S Hwang, S A Vandewater, K C Collins, K M Creehan, K D Janda, M A Taffe
BACKGROUND: Immunotherapies directed against methamphetamine (MA) abuse have shown success in rodent models, however only a limited number of studies have investigated active vaccination in female mice and none in female rats. It is critical to determine if potential immunotherapeutic strategies generalize across sex, particularly for drugs that may produce significant sex-differences on behavioral or physiological endpoints. METHODS: Female Wistar rats were initially vaccinated with keyhole-limpet hemocyanin (KLH) or an anti-methamphetamine-KLH conjugate (MH6-KLH) three times over five weeks and implanted with radiotelemetry devices to assess locomotor activity and body temperature responses to MA...
April 14, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28437716/development-of-a-derivatization-method-for-the-quantification-of-hydrogen-sulfide-and-its-application-in-vascular-calcification-rats
#5
Xiao-Xin Tan, Kao-Qi Lian, Xiang Li, Nan Li, Wei Wang, Wei-Jun Kang, Hong-Mei Shi
Hydrogen sulfide (H2S) plays major functional and structural roles in diverse physiological functions and the pathogenesis of a variety of disorders in biological matrices. The significance of H2S has prompted the development of sensitive and selective methods to determine its concentration in biological samples. The fluorescent reagent monobromobimane (MBB) has been widely used to measure various thiol-containing species through alkylation. MBB may prevent the oxidation of sulfide and the reaction of sulfide with several different species (such as superoxide radicals, hydrogen peroxide and peroxynitrite)...
April 13, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28437641/human-neuronal-cell-based-assay-a-new-in-vitro-model-for-toxicity-evaluation-of-ciguatoxin
#6
Teresa Coccini, Francesca Caloni, Uliana De Simone
Ciguatoxins (CTXs) are emerging marine neurotoxins representing the main cause of ciguatera fish poisoning, an intoxication syndrome which configures a health emergency and constitutes an evolving issue constantly changing due to new vectors and derivatives of CTXs, as well as their presence in new non-endemic areas. The study applied the neuroblastoma cell model of human origin (SH-SY5Y) to evaluate species-specific mechanistic information on CTX toxicity. Metabolic functionality, cell morphology, cytosolic Ca(2+)i responses, neuronal cell growth and proliferation were assessed after short- (4-24h) and long-term exposure (10days) to P-CTX-3C...
April 14, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28437639/a-novel-biosensor-based-on-boronic-acid-functionalized-metal-organic-frameworks-for-the-determination-of-hydrogen-peroxide-released-from-living-cells
#7
Hongxia Dai, Wenjuan Lü, Xianwei Zuo, Qian Zhu, Congjie Pan, Xiaoying Niu, Juanjuan Liu, HongLi Chen, Xingguo Chen
In this work, we report a durable and sensitive H2O2 biosensor based on boronic acid functionalized metal-organic frameworks (denoted as MIL-100(Cr)-B) as an efficient immobilization matrix of horseradish peroxidase (HRP). MIL-100(Cr)-B features a hierarchical porous structure, extremely high surface area, and sufficient recognition sites, which can significantly increase HRP loading and prevent them from leakage and deactivation. The H2O2 biosensor can be easily achieved without any complex processing. Meanwhile, the immobilized HRP exhibited enhanced stability and remarkable catalytic activity towards H2O2 reduction...
April 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28437628/advanced-biomaterials-and-microengineering-technologies-to-recapitulate-the-stepwise-process-of-cancer-metastasis
#8
REVIEW
Nitish Peela, Danh Truong, Harpinder Saini, Hunghao Chu, Samaneh Mashaghi, Stephanie L Ham, Sunil Singh, Hossein Tavana, Bobak Mosadegh, Mehdi Nikkhah
Cancer is one of the leading causes of death globally according to the World Health Organization. Although improved treatments and early diagnoses have reduced cancer related mortalities, metastatic disease remains a major clinical challenge. The local tumor microenvironment plays a significant role in cancer metastasis, where tumor cells respond and adapt to a plethora of biochemical and biophysical signals from stromal cells and extracellular matrix (ECM) proteins. Due to these complexities, there is a critical need to understand molecular mechanisms underlying cancer metastasis to facilitate the discovery of more effective therapies...
April 21, 2017: Biomaterials
https://www.readbyqxmd.com/read/28437610/long-acting-release-formulation-of-exendin-4-based-on-biomimetic-mineralization-for-type-2-diabetes-therapy
#9
Wei Chen, Guohao Wang, Bryant C Yung, Gang Liu, Zhiyong Qian, Xiaoyuan Chen
Exendin-4 has been clinically exploited for treating type 2 diabetes, but the short circulation half-life and multiple daily injections limit its widespread application with respect to poor patient compliance, low efficacy, and high treatment cost. In this study, a potent long-acting release system based on biomimetic mineralization was constructed for biocompatible and sustained exendin-4 delivery. Similar to natural biomineralization, exendin-4 can be mineralized to form nano-sized mineral solids by means of the reaction between acidic amino acid residues and calcium ions in a supersaturated environment with negligible influence on peptide bioactivity...
April 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28437568/insights-into-deep-sea-adaptations-and-host-symbiont-interactions-a-comparative-transcriptome-study-on-bathymodiolus-mussels-and-their-coastal-relatives
#10
Ping Zheng, Minxiao Wang, Chaolun Li, Xiaoqing Sun, Xiaocheng Wang, Yan Sun, Song Sun
Mussels (Bivalve: Mytilidae) have adapted to various habitats, from freshwater to the deep sea. To understand their adaptive characteristics in different habitats, particularly in the bathymodiolin mussels in deep-sea chemosynthetic ecosystems, we conducted a comparative transcriptomic analysis between deep-sea bathymodiolin mussels and their shallow-water relatives. A number of gene families related to stress responses were shared across all mussels, without specific or significantly expanded families in deep-sea species, indicating that all mussels are capable of adapting to diverse harsh environments, but that different members of the same gene family may be preferentially utilized by different species...
April 24, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28437539/safety-and-efficacy-of-antiviral-therapy-for-prevention-of-cytomegalovirus-reactivation-in-immunocompetent-critically-ill-patients-a-randomized-clinical-trial
#11
Nicholas J Cowley, Andrew Owen, Sarah C Shiels, Joanne Millar, Rebecca Woolley, Natalie Ives, Husam Osman, Paul Moss, Julian F Bion
Importance: Latent cytomegalovirus (CMV) infection is present in more than half the adult population, and a viral reactivation (ie, when the virus becomes measurable in body fluids such as blood) can occur in up to one-third of these individuals during episodes of critical illness. Objective: To determine whether antiviral therapy is safe and effective for preventing CMV reactivation in a general population of critically ill patients. Design, Setting, and Participants: A single-center, open-label, randomized, controlled clinical trial recruited 124 CMV-seropositive patients undergoing mechanical ventilation for at least 24 hours in the intensive care unit between January 1, 2012, and January 31, 2014...
April 24, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28437526/prominin-1-is-a-novel-regulator-of-autophagy-in-the-human-retinal-pigment-epithelium
#12
Sujoy Bhattacharya, Jinggang Yin, Christina S Winborn, Qiuhua Zhang, Junming Yue, Edward Chaum
Purpose: Prominin-1 (Prom1) is a transmembrane glycoprotein, which is expressed in stem cell lineages, and has recently been implicated in cancer stem cell survival. Mutations in the Prom1 gene have been shown to disrupt photoreceptor disk morphogenesis and cause an autosomal dominant form of Stargardt-like macular dystrophy (STGD4). Despite the apparent structural role of Prom1 in photoreceptors, its role in other cells of the retina is unknown. The purpose of this study is to investigate the role of Prom1 in the highly metabolically active cells of the retinal pigment epithelium (RPE)...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28437479/conformational-dynamics-of-bacterial-trigger-factor-in-apo-and-ribosome-bound-states
#13
Mehmet Tarik Can, Zeynep Kurkcuoglu, Gokce Ezeroglu, Arzu Uyar, Ozge Kurkcuoglu, Pemra Doruker
The chaperone trigger factor (TF) binds to the ribosome exit tunnel and helps cotranslational folding of nascent chains (NC) in bacterial cells and chloroplasts. In this study, we aim to investigate the functional dynamics of fully-atomistic apo TF and its complex with 50S. As TF accomodates a high percentage of charged residues on its surface, the effect of ionic strength on TF dynamics is assessed here by performing five independent molecular dynamics (MD) simulations (total of 1.3 micro-second duration) at 29 mM and 150 mM ionic strengths...
2017: PloS One
https://www.readbyqxmd.com/read/28437467/mutant-uromodulin-expression-leads-to-altered-homeostasis-of-the-endoplasmic-reticulum-and-activates-the-unfolded-protein-response
#14
Céline Schaeffer, Stefania Merella, Elena Pasqualetto, Dejan Lazarevic, Luca Rampoldi
Uromodulin is the most abundant urinary protein in physiological conditions. It is exclusively produced by renal epithelial cells lining the thick ascending limb of Henle's loop (TAL) and it plays key roles in kidney function and disease. Mutations in UMOD, the gene encoding uromodulin, cause autosomal dominant tubulointerstitial kidney disease uromodulin-related (ADTKD-UMOD), characterised by hyperuricemia, gout and progressive loss of renal function. While the primary effect of UMOD mutations, retention in the endoplasmic reticulum (ER), is well established, its downstream effects are still largely unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28437427/bacterial-diversity-of-bacteriomes-and-organs-of-reproductive-digestive-and-excretory-systems-in-two-cicada-species-hemiptera-cicadidae
#15
Zhou Zheng, Dandan Wang, Hong He, Cong Wei
Cicadas form intimate symbioses with bacteria to obtain nutrients that are scarce in the xylem fluid they feed on. The obligate symbionts in cicadas are purportedly confined to specialized bacteriomes, but knowledge of bacterial communities associated with cicadas is limited. Bacterial communities in the bacteriomes and organs of reproductive, digestive and excretory systems of two cicada species (Platypleura kaempferi and Meimuna mongolica) were investigated using different methods, and the bacterial diversity and distribution patterns of dominant bacteria in different tissues were compared...
2017: PloS One
https://www.readbyqxmd.com/read/28437395/global-survey-of-the-immunomodulatory-potential-of-common-drugs
#16
Gregory I Vladimer, Berend Snijder, Nikolaus Krall, Johannes W Bigenzahn, Kilian V M Huber, Charles-Hugues Lardeau, Kumar Sanjiv, Anna Ringler, Ulrika Warpman Berglund, Monika Sabler, Oscar Lopez de la Fuente, Paul Knöbl, Stefan Kubicek, Thomas Helleday, Ulrich Jäger, Giulio Superti-Furga
Small-molecule drugs may complement antibody-based therapies in an immune-oncology setting, yet systematic methods for the identification and characterization of the immunomodulatory properties of these entities are lacking. We surveyed the immumomodulatory potential of 1,402 small chemical molecules, as defined by their ability to alter the cell-cell interactions among peripheral mononuclear leukocytes ex vivo, using automated microscopy and population-wide single-cell image analysis. Unexpectedly, ∼10% of the agents tested affected these cell-cell interactions differentially...
April 24, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28437389/normothermic-perfusion-in-the-assessment-and-preservation-of-declined-livers-before-transplantation-hyperoxia-and-vasoplegia-important-lessons-from-the-first-12-cases
#17
Christopher J E Watson, Vasilis Kosmoliaptsis, Lucy V Randle, Alexander E Gimson, Rebecca Brais, John R Klinck, Mazin Hamed, Anastasia Tsyben, Andrew J Butler
BACKGROUND: A program of normothermic ex situ liver perfusion (NESLiP) was developed to facilitate better assessment and use of marginal livers, while minimizing cold ischemia. METHODS: Declined marginal livers and those offered for research were evaluated. Normothermic ex situ liver perfusion was performed using an erythrocyte-based perfusate. Viability was assessed with reference to biochemical changes in the perfusate. RESULTS: Twelve livers (9 donation after circulatory death [DCD] and 3 from brain-dead donors), median Donor Risk Index 2...
May 2017: Transplantation
https://www.readbyqxmd.com/read/28437314/outcome-for-patients-with-pathological-esophageal-acid-exposure-after-laparoscopic-fundoplication
#18
Jelmer E Oor, Vincent B Nieuwenhuijs, Peter G Devitt, Eric J Hazebroek, David I Watson
OBJECTIVE: The aim of the current study was to assess symptomatic outcome and need for surgical reintervention for patients identified with pathological esophageal acid exposure by routine postoperative 24-hour pH-monitoring. BACKGROUND: Although laparoscopic fundoplication is associated with excellent short- and midterm results, recurrent symptoms pose an important challenge. Postoperative pH-monitoring is considered the "gold standard" for diagnosing recurrent GERD and frequently used for routine postoperative follow up...
April 21, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28437308/effectiveness-of-shotblocker-for-immunization-pain-in-full-term-neonates-a-randomized-controlled-trial
#19
Seda Caglar, Funda Büyükyılmaz, Gülhan Coşansu, Sabiha Çağlayan
Nonpharmacologic strategies exist to manage procedural pain in healthy newborn infants. The aim of this prospective randomized controlled trial (RCT) was to examine the efficacy of ShotBlocker for managing injection pain associated with the first intramuscular hepatitis B vaccine given to healthy full-term neonates. This randomized controlled trial study was conducted in a private university hospital in Istanbul, Turkey, in which 100 healthy term neonates were randomly assigned to either a ShotBlocker (n = 50) or control group (n = 50)...
April 2017: Journal of Perinatal & Neonatal Nursing
https://www.readbyqxmd.com/read/28437281/cardioprotection-by-low-dose-of-estrogen-and-testosterone-at-the-physiological-ratio-on-ovx-rats-during-ischemia-reperfusion-injury
#20
Lu Fu, Yuyu Liu, Jiaxing Wang, Yu Sun, Lei Zhang, Ting Wu, Yiqian Li, Bin Wang, Shuting Huang, Huimin Bu, Hong Sun
Although estrogen and testosterone deficiency have often been associated with the development of cardiac diseases in postmenopausal women, the benefits of estrogen or testosterone therapy are controversial. Supplementation high dose of estrogen or testosterone alone has been associated with many side-effects, especially estrogen. This study was aimed to investigate whether supplementation of testosterone in combination with low-dose estrogen conferred stronger cardioprotective effects on ovariectomized rats subjected to ischemia/reperfusion (I/R) injury...
April 18, 2017: Journal of Cardiovascular Pharmacology
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