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https://www.readbyqxmd.com/read/29054025/antibacterial-activity-against-cariogenic-bacteria-and-cytotoxic-and-genotoxic-potential-of-anacardium-occidentale-l-and-anadenanthera-macrocarpa-benth-brenan-extracts
#1
Josenildo Segundo Chaves de Araújo, Aline Rogéria Freire de Castilho, Andressa Brito Lira, Andréia Vieira Pereira, Tatiane Kelly Barbosa de Azevêdo, Edja Maria de Melo de Brito Costa, Maria do Socorro Vieira Pereira, Hilzeth Freire Luna Pessoa, Jozinete Vieira Pereira
OBJECTIVES: The present study aimed to assess the antibacterial activity against bacteria with cariogenic relevance, toxic and genotoxic potential of the plants Anacardium occidentale L. and Anadenanthera macrocarpa (Benth.) Bernam. DESIGN: Using a microdilution technique, the extracts were submitted to minimum inhibitory concentration (MIC) testing against Streptococcus mitis (ATCC 903), Streptococcus mutans (ATCC 25175), Streptococcus oralis (ATCC 10557), Streptococcus salivarius (ATCC 7073), Streptococcus sanguinis (ATCC 15300) and Streptococcus sobrinus (ATCC 27609)...
October 14, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29054014/sex-differences-in-behavioral-and-neurochemical-effects-of-gonadectomy-and-aromatase-inhibition-in-rats
#2
N Kokras, N Pastromas, D Papasava, C de Bournonville, C A Cornil, C Dalla
Aromatase inhibitors, which are widely used for the treatment of estrogen-dependent cancers, have been associated with psychiatric side effects ranging from mania to depression. In the present study, we investigated sex differences in the behavioral and neurochemical effects of aromatase inhibition on male and female, sham-operated or gonadectomized adult rats. Three weeks after surgery, rats received chronic treatment with the aromatase inhibitor letrozole or vehicle and were then subjected to the open field test, which assesses general activity...
October 10, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29053988/intermedin-reduces-neointima-formation-by-regulating-vascular-smooth-muscle-cell-phenotype-via-camp-pka-pathway
#3
Qing Zhu, Xian-Qiang Ni, Wei-Wei Lu, Jin-Sheng Zhang, Jin-Ling Ren, Di Wu, Yao Chen, Lin-Shuang Zhang, Yan-Rong Yu, Chao-Shu Tang, Yong-Fen Qi
BACKGROUND AND AIMS: Vascular smooth muscle cell (VSMC) dedifferentiation contributes to neointima formation, which results in various vascular disorders. Intermedin (IMD), a cardiovascular paracrine/autocrine polypeptide, is involved in maintaining circulatory homeostasis. However, whether IMD protects against neointima formation remains largely unknown. The purpose of this study is to investigate the role of IMD in neointima formation and the possible mechanism. METHODS: IMD1-53 (100ng/kg/h) or saline water was used on rat carotid-artery balloon-injury model...
October 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29053925/mesenchymal-stem-cell-secretome-improves-tendon-cell-viability-in-vitro-and-tendon-bone-healing-in-vivo-when-a-tissue-engineering-strategy-is-used-in-a-rat-model-of-chronic-massive-rotator-cuff-tear
#4
Nuno Sevivas, Fábio Gabriel Teixeira, Raquel Portugal, Bruno Direito-Santos, João Espregueira-Mendes, Filipe J Oliveira, Rui F Silva, Nuno Sousa, Wan Ting Sow, Nguyen Luong, Kee Woei Ng, António J Salgado
BACKGROUND: Massive rotator cuff tears (MRCTs) represent a major clinical concern, especially when degeneration and chronicity are involved, which highly compromise healing capacity. PURPOSE: To study the effect of the secretome of mesenchymal stem cells (MSCs) on tendon cells (TCs) followed by the combination of these activated TCs with an electrospun keratin-based scaffold to develop a tissue engineering strategy to improve tendon-bone interface (TBi) healing in a chronic MRCT rat model...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29053883/pharmacokinetics-of-inorganic-cobalt-and-a-vitamin-b12-supplement-in-the-thoroughbred-horse-differentiating-cobalt-abuse-from-supplementation
#5
L L Hillyer, Z Ridd, S Fenwick, P Hincks, S W Paine
BACKGROUND: Whilst cobalt is an essential micronutrient for vitamin B12 synthesis in the horse, at supra-physiological concentrations it has been shown to enhance performance in humans and rats and there is evidence that its administration in high doses to horses poses a welfare threat. Animal sport regulators currently control cobalt abuse via international race day thresholds, but since cobalt may be present in physiological concentrations this work was initiated to explore means of potentially adding to application of those thresholds...
October 20, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29053824/chemogenetic-locus-coeruleus-activation-restores-reversal-learning-in-a-rat-model-of-alzheimer-s-disease
#6
Jacki M Rorabaugh, Termpanit Chalermpalanupap, Christian A Botz-Zapp, Vanessa M Fu, Natalie A Lembeck, Robert M Cohen, David Weinshenker
Clinical evidence suggests that aberrant tau accumulation in the locus coeruleus and noradrenergic dysfunction may be a critical early step in Alzheimer's disease progression. Yet, an accurate preclinical model of these phenotypes that includes early pretangle tau accrual in the locus coeruleus, loss of locus coeruleus innervation and deficits locus coeruleus/norepinephrine modulated behaviours, does not exist, hampering the identification of underlying mechanisms and the development of locus coeruleus-based therapies...
September 25, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29053731/determination-of-%C3%AE-%C3%AE-and-%C3%AE%C2%BA-opioid-receptors-in-forebrain-cortex-of-rats-exposed-to-morphine-for-10-days-comparison-with-animals-after-20-days-of-morphine-withdrawal
#7
Hana Ujcikova, Martina Hlouskova, Kristina Cechova, Katerina Stolarova, Lenka Roubalova, Petr Svoboda
BACKGROUND: Chronic exposure of mammalian organism to morphine results in adaption to persistent high opioid tone through homeostatic adjustments. Our previous results indicated that in the frontal brain cortex (FBC) of rats exposed to morphine for 10 days, such a compensatory adjustment was detected as large up-regulation of adenylylcyclases I (8-fold) and II (2.5-fold). The other isoforms of AC (III-IX) were unchanged. Importantly, the increase of ACI and ACII was reversible as it disappeared after 20 days of morphine withdrawal...
2017: PloS One
https://www.readbyqxmd.com/read/29053717/gpr40-partial-agonists-and-agopams-differentiating-effects-on-glucose-and-hormonal-secretions-in-the-rodent
#8
Michele J Pachanski, Melissa E Kirkland, Daniel T Kosinski, Joel Mane, Boonlert Cheewatrakoolpong, Jiyan Xue, Daphne Szeto, Gail Forrest, Corin Miller, Michelle Bunzel, Christopher W Plummer, Harry R Chobanian, Michael W Miller, Sarah Souza, Brande S Thomas-Fowlkes, Aimie M Ogawa, Adam B Weinglass, Jerry Di Salvo, Xiaoyan Li, Yue Feng, Daniel A Tatosian, Andrew D Howard, Steven L Colletti, Maria E Trujillo
GPR40 agonists are effective antidiabetic agents believed to lower glucose through direct effects on the beta cell to increase glucose stimulated insulin secretion. However, not all GPR40 agonists are the same. Partial agonists lower glucose through direct effects on the pancreas, whereas GPR40 AgoPAMs may incorporate additional therapeutic effects through increases in insulinotrophic incretins secreted by the gut. Here we describe how GPR40 AgoPAMs stimulate both insulin and incretin secretion in vivo over time in diabetic GK rats...
2017: PloS One
https://www.readbyqxmd.com/read/29053707/high-glucose-augments-angiotensinogen-in-human-renal-proximal-tubular-cells-through-hepatocyte-nuclear-factor-5
#9
Juan Wang, Yuki Shibayama, Hiroyuki Kobori, Ya Liu, Hideki Kobara, Tsutomu Masaki, Zhiyu Wang, Akira Nishiyama
High glucose has been demonstrated to induce angiotensinogen (AGT) synthesis in the renal proximal tubular cells (RPTCs) of rats, which may further activate the intrarenal renin-angiotensin system (RAS) and contribute to diabetic nephropathy. This study aimed to investigate the effects of high glucose on AGT in the RPTCs of human origin and identify the glucose-responsive transcriptional factor(s) that bind(s) to the DNA sequences of AGT promoter in human RPTCs. Human kidney (HK)-2 cells were treated with normal glucose (5...
2017: PloS One
https://www.readbyqxmd.com/read/29053705/vagus-nerve-stimulation-in-pregnant-rats-and-effects-on-inflammatory-markers-in-the-brainstem-of-neonates
#10
Allison Judkins, Rhaya L Johnson, Samuel T Murray, Steven Yellon, Christopher G Wilson
BackgroundVagus Nerve Stimulation (VNS) is an FDA-approved method delivering electrical impulses for treatment of depression and epilepsy in adults. The vagus nerve innervates the majority of visceral organs and cervix, but potential impacts of VNS on the progress of pregnancy and the fetus are not well studied.MethodsWe tested the hypothesis that VNS in pregnant dams does not induce inflammatory changes in the cardiorespiratory control regions of the pups' brainstem, potentially impacting the morbidity and mortality of offspring...
October 20, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29053704/hypoxic-renal-injury-in-newborns-with-abdominal-compartment-syndrome-clinical-and-experimental-study
#11
Dmitry Morozov, Olga Morozova, Dmitri Pervouchine, Lubov Severgina, Alexei Tsyplakov, Natalya Zakharova, Nikita Sushentsev, Larisa Maltseva, Ivan Budnik
BackgroundSurgical treatment for gastroschisis and congenital diaphragmatic hernia (CDH) commonly leads to abdominal compartment syndrome (ACS) associated with hypoxic renal injury. We hypothesized that measurement of urinary and serum concentrations of VEGF, π-GST, and MCP-1 may serve for non-invasive detection of hypoxic renal injury in such patients.MethodsIntra-abdominal pressure (IAP), renal excretory function, and the biomarker levels were analyzed before, 4 and 10 day after surgery. Association between the biomarker levels and renal histology was investigated using an original model of ACS in newborn rats...
October 20, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29053702/the-effects-of-adding-prophylactic-phenobarbital-to-therapeutic-hypothermia-in-the-term-equivalent-hypoxic-ischemic-rat
#12
Sushma Krishna, Alexandra Hutton, Eric Aronowitz, Holly Moore, Susan J Vannucci
BackgroundHypoxic-ischemic encephalopathy (HIE) is a major cause of neonatal morbidity and mortality. Therapeutic hypothermia (TH) is the only available intervention, but neuroprotection is incomplete and variable. Seizures are common in infants with HIE undergoing TH and may worsen outcome. Phenobarbital is sometimes added, although use of prophylactic phenobarbital is controversial in the neonate. We hypothesize that prophylactic phenobarbital (PB) will not reduce, and may enhance, the neuroprotective effects of TH on brain injury and motor outcomes in the postnatal-day 10 (P10) hypoxic-ischemic (HI) rat...
October 20, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29053697/stereotactically-guided-ablation-of-the-rat-auditory-cortex-and-localization-of-the-lesion-in-the-brain
#13
Verónica Lamas, Sheila Estévez, Marianni Pernía, Ignacio Plaza, Miguel A Merchán
The rat auditory cortex (AC) is becoming popular among auditory neuroscience investigators who are interested in experience-dependence plasticity, auditory perceptual processes, and cortical control of sound processing in the subcortical auditory nuclei. To address new challenges, a procedure to accurately locate and surgically expose the auditory cortex would expedite this research effort. Stereotactic neurosurgery is routinely used in pre-clinical research in animal models to engraft a needle or electrode at a pre-defined location within the auditory cortex...
October 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29053693/in-vivo-tracking-of-human-adipose-derived-mesenchymal-stem-cells-in-a-rat-knee-osteoarthritis-model-with-fluorescent-lipophilic-membrane-dye
#14
Meng Li, Ming Hao, Dong Jiang, Yanxi Chen, Wen Wang
In order to support the clinical application of human adipose-derived mesenchymal stem cell (haMSC) therapy for knee osteoarthritis (KOA), we examined the efficacy of cell persistence and biodistribution of haMSCs in animal models. We demonstrated a method to label the cell membrane of haMSCs with lipophilic fluorescent dye. Subsequently, intra-articular injection of the labeled cells in rats with surgically induced KOA was monitored dynamically by an in vivo imaging system. We employed the lipophilic carbocyanines DiD (DilC18 (5)), a far-red fluorescent Dil (dialkylcarbocyanines) analog, which utilized a red laser to avoid excitation of the natural green autofluorescence from surrounding tissues...
October 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29053522/immediate-enhancement-of-nerve-function-using-a-novel-axonal-fusion-device-after-neurotmesis
#15
David Colton Riley, Richard B Boyer, Curt A Deister, Alonda C Pollins, Nancy L Cardwell, Nathaniel D Kelm, Mark D Does, Richard D Dortch, Ravinder Bamba, Robert Bruce Shack, Wesley P Thayer
BACKGROUND: The management of peripheral nerve injuries remains a large challenge for plastic surgeons. With the inability to fuse axonal endings, results after microsurgical nerve repair have been inconsistent. Our current nerve repair strategies rely upon the slow and lengthy process of axonal regeneration (~1 mm/d). Polyethylene glycol (PEG) has been investigated as a potential axonal fusion agent; however, the percentage of axonal fusion has been inconsistent. The purpose of this study was to identify a PEG delivery device to standardize outcomes after attempted axonal fusion with PEG...
October 19, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29053516/fat-graft-survival-after-recipient-site-pretreatment-with-fractional-carbon-dioxide-laser
#16
Sung-Eun Kim, Jun Ho Lee, Tae Gon Kim, Yong-Ha Kim, Kyu Jin Chung
BACKGROUND: Fat grafting is a commonly performed procedure not only for augmenting the soft tissue but also for regeneration in esthetic and reconstructive plastic surgery.However, unpredictable fat survival rate because of high resorption rate is remained as the main problem. The purpose of this study was to investigate the effect of pretreatment of the recipient site to the fat survival using fractional carbon dioxide (CO2) laser. METHODS: The rats were divided to 2 groups...
October 19, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29053271/discovery-of-7-18-f-fluorotryptophan-as-a-novel-pet-probe-for-the-visualization-of-tryptophan-metabolism-in-vivo
#17
Boris D Zlatopolskiy, Johannes Zischler, Dominique Schäfer, Elizaveta A Urusova, Mehrab Guliyev, Olesia Bannykh, Heike Endepols, Bernd Neumaier
Tryptophan and its metabolites are involved in different physiological and pathophysiological processes. Consequently, PET tracers addressing tryptophan metabolic pathways should allow the detection of different pathologies like neurological disorders and cancer. Herein we report an efficient method for the preparation of fluorotryptophans labeled in different positions with (18)F and their biological evaluation. 4-7-[(18)F]Fluorotryptophans ([(18)F]FTrps) were prepared according to a modified protocol of alcohol-enhanced Cu-mediated radiofluorination in 30-53% radiochemical yields...
October 20, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29053169/whole-body-physiologically-based-modelling-of-beta-blockers-in-the-rat-events-in-tissues-and-plasma-following-an-intravenous-bolus-dose
#18
S Y A Cheung, T Rodgers, L Aarons, I Gueorguieva, G L Dickinson, S Murby, C Brown, B Collins, M Rowland
BACKGROUND AND PURPOSE: Whole body physiologically based pharmacokinetic (PBPK) models have been increasingly applied in drug development to describe kinetic events of therapeutic agents in animals and human. The advantage of such modelling is the ability to incorporate vast amounts of physiological information, such as organ blood flow and volume, to ensure that the model is as close to reality as possible. EXPERIMENTAL APPROACH: Prior PBPK model development of enantiomers of a series of seven racemic betablockers, namely acebutolol, betaxolol, bisoprolol, metoprolol, oxprenolol, pindolol and propranolol, together with S-timolol in rat was based on tissue and blood concentration data at steady state...
October 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29053139/chronic-fluoxetine-upregulates-activity-protein-and-mrna-levels-of-cytosolic-phospholipase-a2-in-rat-frontal-cortex
#19
J S Rao, R N Ertley, H-J Lee, S I Rapoport, R P Bazinet
This corrects the article DOI: 10.1038/sj.tpj.6500391.
October 17, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/29053138/mir-31a-5p-promotes-postnatal-cardiomyocyte-proliferation-by-targeting-rhobtb1
#20
Junjie Xiao, Hui Liu, Dragos Cretoiu, Daniela Oana Toader, Nicolae Suciu, Jing Shi, Shutong Shen, Yihua Bei, Joost Pg Sluijter, Saumya Das, Xiangqing Kong, Xinli Li
A limited number of microRNAs (miRNAs, miRs) have been reported to control postnatal cardiomyocyte proliferation, but their strong regulatory effects suggest a possible therapeutic approach to stimulate regenerative capacity in the diseased myocardium. This study aimed to investigate the miRNAs responsible for postnatal cardiomyocyte proliferation and their downstream targets. Here, we compared miRNA profiles in cardiomyocytes between postnatal day 0 (P0) and day 10 (P10) using miRNA arrays, and found that 21 miRNAs were upregulated at P10, whereas 11 were downregulated...
October 20, 2017: Experimental & Molecular Medicine
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