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https://www.readbyqxmd.com/read/29684917/co2-permeability-of-rat-hepatocytes-and-relation-of-co2-permeability-to-co2-production
#1
Mariela Arias-Hidalgo, Qinggong Yuan, Fabrizio Carta, Claudiu T Supuran, Gerolf Gros, Volker Endeward
BACKGROUND/AIMS: It has been described that cells in culture with very low oxidative metabolism possess a low CO2 membrane permeability, PCO2, of ∼ 0.01 cm/s. On the other hand, cardiomyocytes and mitochondria with extremely high rates of O2 consumption exhibit very high CO2 membrane permeabilities of 0.1 and 0.3 cm/s, repectively. To ascertain that this represents a systematic relationship, we determine here PCO2 of hepatocytes, which exhibit an intermediate rate of O2 consumption...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29684860/polyphenol-rich-extract-of-ocimum-gratissimum-leaves-ameliorates-colitis-via-attenuating-colonic-mucosa-injury-and-regulating-pro-inflammatory-cytokines-production-and-oxidative-stress
#2
Quadri K Alabi, Rufus O Akomolafe, Joseph G Omole, Modinat A Adefisayo, Olaofe L Ogundipe, Ayodeji Aturamu, Joseph O Sanya
Colitis is a chronic inflammation and ulcer on the inner lining of the large intestine. For many centuries Ocimum gratissimum (OG) leaves have been used in folk medicine in Nigeria to treat inflammatory bowel diseases, however, to date, the anti-colitis effects of OG have not been scientifically proven. In this study we investigated the effects of polyphenol rich extract of Ocimum gratissimum (PREOG) leaf on colonic mucosa injury in colitis, its mechanisms, initial administration time and dosage. Dextran sodium sulfate (DSS)-induced rat colitis models was used...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684858/a-novel-triazine-ring-compound-md568-exerts-in-vivo-and-in-vitro-effects-on-lipid-metabolism
#3
Dan Jia, Ziwen Li, Ying Gao, Yifan Feng, Weimin Li
In this study, we investigated the toxicity and biological activity of a novel triazine ring compound named magnolol derivative 568 (MD568). The LD50 of MD568 was determined in Sprague-Dawley (SD) rats by intraperitoneal injection. Treatment of high fat diet-induced obese rats with MD568 demonstrated that MD568 displayed significant anti-obesity effects. MD568 markedly reduced body weight, blood lipid contents, white adipose tissue (WAT) and liver mass in obese rats. In addition, MD568 modulated lesions in WAT through regulating PPAR-Ɣ, C/EBP-a, SREBP-1c and FABP-4 proteins in the liver through regulating PPAR-α, SREBP-1c and FABP-4...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684856/cerium-oxide-nanoparticles-in-pursuit-of-liver-protection-against-doxorubicin-induced-injury-in-rats
#4
Heba G Ibrahim, Noha Attia, Fatma El Zahraa A Hashem, Moushira A R El Heneidy
Doxorubicin (DOX) is considered as a backbone in several chemotherapeutic regimens. Nevertheless, the reported systemic toxicity usually hampers its broad application. Interestingly, Cerium oxide nanoparticles (CeONPs) depicted promising regenerative antioxidant and hepatoprotective potentials against multiple oxidative stress-induced pathologies. Thus, the aim of the present study was to determine either CeONPs would display hepatoprotective properties once concomitantly administered with DOX or not. Male Sprague Dawley rats were divided into four groups (n = 10) in a two weeks study: Control (received saline, IP injection thrice a week), CeO (0...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684813/metabolite-characterization-of-ambrisentan-in-in-vitro-and-in-vivo-matrices-by-uhplc-qtof-ms-ms-detection-of-glutathione-conjugate-of-epoxide-metabolite-evidenced-by-in-vitro-gsh-trapping-assay
#5
P Johnsi Rani, Chiguru Vishnuvardhan, Rakesh D Nimbalkar, Prabha Garg, N Satheeshkumar
The focus of the present study is on in vitro and in vivo metabolite identification of ambrisentan (AMBR) a selective endothelin type - A (ETA) receptor antagonist using quadruple time-of-flight mass spectrometry (QTOF/MS). in vitro metabolism study was conducted by incubating AMBR in rat liver microsomes (RLM), rat and human liver S9 fractions. In vivo study was carried out through the collection of urine, faeces and plasma samples at various time points after oral administration of AMBR in suspension form at a dose of 25 mg/kg to six male Sprague - Dawley (SD) rats...
April 12, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29684807/development-of-urogenital-system-in-the-spix-cavy-a-model-for-studies-on-sexual-differentiation
#6
Amilton Cesar Dos Santos, Alan James Conley, Moacir Franco de Oliveira, Antônio Chaves de Assis Neto
This study documented, for the first time, the morphological patterns of differentiation of male and female genital organs of Spix cavy (Galea spixii) using histological and ultrastructural analyses, with immuno-localization of steroidogenic enzymes, cytochromes P450 aromatase (P450arom) and 17α-hydroxylase/17, 20-lyase (P450c17), involved in the synthesis of estrogens and androgens respectively throughout fetal sexual development. Undifferentiated gonads of Spix cavy develop into ovaries in females after 25 days of gestation (DG), exhibiting P450arom immunoreactivity...
April 13, 2018: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29684720/cicer-arietinum-extract-ameliorate-%C3%AE-irradiation-disorders-via-modulation-of-oxidative-antioxidative-pathway
#7
Amany A Sayed, Osama A Abbas, Mona A Saad, Mohamed-Assem S Marie
Ionized radiations trigger thoughtful adverse hazards through multiple organ dysfunctions. Recently, antioxidant-based biodrugs are used to prevent and treat ionizing radiation hazards. The present study aimed to investigate the prospective ameliorative effect of Cicer arietinum extract (CAE) against γ-irradiation and the pathway of this amelioration in male albino rats. Twenty four rats were allocated into four groups; (i) control group, (ii) CAE group in which rats treated with a dosage of 500 mg CAE/kg b...
April 14, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29684717/photobiomodulation-mechanisms-in-the-kinetics-of-the-wound-healing-process-in-rats
#8
A N Otterço, A L Andrade, P Brassolatti, K N Z Pinto, H S S Araújo, N A Parizotto
OBJECTIVES: The healing process of cutaneous lesions is considered a complex event divided into distinct and overlapping phases, which responds satisfactorily to photobiomodulation (PBM). PBM is indicated as a therapeutic resource capable of assisting tissue repair. The present study aimed to analyze the kinetics of cutaneous wounds healing process after application of the GaAlAs laser for treating wounds on the dorsum of rats. MATERIALS AND METHODS: This study was approved by the Animal Ethics Committee of UFSCar...
April 8, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29684635/sulfatase-1-mediates-the-attenuation-of-ang-ii-induced-hypertensive-effects-by-ccl5-in-vascular-smooth-muscle-cells-from-spontaneously-hypertensive-rats
#9
Hye Ju Cha, Hye Young Kim, Hee Sun Kim
Extracellular sulfatases, sulfatase 1 (Sulf1) and sulfatase 2 (Sulf2), play a pivotal role in cell signaling and carcinogenesis. Chemokine CCL5 inhibits Ang II-induced hypertensive mediators via angiotensin II (Ang II) type 2 receptor (AT2 R) pathway in vascular smooth muscle cells (VSMCs) from spontaneously hypertensive rats (SHR). In this study, we investigated the effect of Sulfs on anti-hypertensive effects of CCL5 in SHR VSMCs. CCL5 attenuated Ang II-induced inhibition of sulfatase activity in SHR VSMCs...
April 20, 2018: Cytokine
https://www.readbyqxmd.com/read/29684621/setd7-and-its-contribution-to-boron-induced-bone-regeneration-in-b-mbg-scaffolds
#10
Chengcheng Yin, Xiaoshi Jia, Richard J Miron, Qiaoyun Long, Hudi Xu, Yan Wei, Min Wu, Yufeng Zhang, Zubing Li
Boron (B), a trace element found in the human body, plays an important role for health of bone by promoting the proliferation and differentiation of osteoblasts. Our research group previously fabricated B-mesoporous bioactive glass (MBG) scaffolds, which successfully promoted osteogenic differentiation of osteoblasts when compared to pure MBG scaffolds without boron. However, the mechanisms of the positive effect of B-MBG scaffolds on osteogenesis remains unknown. Therefore, we performed in-vivo experiments in an OVX rat models with pure MBG scaffolds and compared them to B-MBG scaffold...
April 20, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29684589/hydrogen-sulfide-donor-nahs-stimulates-anp-secretion-via-the-k-atp-channel-and-the-nos-sgc-pathway-in-rat-atria
#11
Lamei Yu, Byung Mun Park, Yong Jin Ahn, Gi-Ja Lee, Suhn Hee Kim
Hydrogen sulfide (H2 S) is normally produced from L-cysteine in mammalian tissues and related to the pathogenesis of cardiovascular diseases. The aim of this study is to investigate the effects of H2 S donor on atrial natriuretic peptide (ANP) secretion and define its mechanism using normal and isoproterenol (ISP)-treated rats. Several H2 S donors were perfused into isolated beating rat atria, and atrial pressure (AP) and ANP secretion were measured. NaHS augmented high stretch-induced ANP secretion and decreased AP in a dose-dependent manner...
April 20, 2018: Peptides
https://www.readbyqxmd.com/read/29684554/short-term-oral-gavage-administration-of-adenine-induces-a-model-of-fibrotic-kidney-disease-in-rats
#12
Chang Z Zhu, Kelly J Doyle, Arthur L Nikkel, Lauren Olsen, Marian T Namovic, Katherine Salte, Deborah Widomski, Zhi Su, Diana L Donnelly-Roberts, Murali M Gopalakrishnan, Steve McGaraughty
INTRODUCTION: The adenine model of kidney disease typically involves dietary delivery of adenine over several weeks. This model can be variable in its disease progression and can result in significant mortality. In the current study, the amount of adenine delivered to rats was controlled by utilizing oral gavage administration over a short period in an attempt to induce robust renal pathology while addressing variability and viability of the animals. METHODS: Adenine (150 or 200 mg/kg) was administered via oral gavage for 10 consecutive days, and assessed over a total of 20 days...
April 20, 2018: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/29684552/neonatal-whisker-trimming-in-wag-rij-rat-pups-causes-developmental-delay-encourages-maternal-care-and-affects-exploratory-activity-in-adulthood
#13
Kirill Smirnov, Daria Tsvetaeva, Evgenia Sitnikova
WAG/Rij rats are genetically predisposed to absence epilepsy. Maternal behavior in WAG/Rij female rats is known to differ from that in non-epileptic females. We hypothesize that (1) mother's behavior may be changed as response to changes in pup's conditions; (2) sensory deprivation at the neonatal age affect learning and behavior in adulthood. All whiskers in WAG/Rij rat pups were trimmed daily during PN1-PN8. Maternal behavior was examined during the same period. It was found that in the control group, WAG/Rij females often demonstrated abnormally long (>1 min) repetitive purposeless stereotypical actions that were roughly classified as compulsive-like behavior...
April 20, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29684535/sodium-caprate-enables-the-blood-pressure-lowering-effect-of-ile-pro-pro-and-leu-lys-pro-in-spontaneously-hypertensive-rats-by-indirectly-overcoming-pept1-inhibition
#14
John P Gleeson, Jesús M Frías, Sinéad M Ryan, David J Brayden
The tripeptides, Ile-Pro-Pro (IPP) and Leu-Lys-Pro (LKP), inhibit angiotensin-converting enzyme (ACE) resulting in lowered blood pressure. Our hypothesis was that the medium chain fatty acid permeation enhancer, sodium caprate (C10 ), may prevent the decrease in permeability of the tripeptides when PepT1 is inhibited by glycyl-sarcosine (Gly-Sar), a situation that may occur in the presence of food hydrolysates. Using Caco-2 monolayers and isolated rat jejunal tissue, the apparent permeability coefficients (Papp ) of [3 H]-IPP and [3 H]-LKP were assessed in the presence of Gly-Sar with and without C10 ...
April 20, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29684534/towards-a-maraviroc-long-acting-injectable-nanoformulation
#15
Lee M Tatham, Alison C Savage, Andrew Dwyer, Marco Siccardi, Trevor Scott, Manoli Vourvahis, Andrew Clark, Steven P Rannard, Andrew Owen
Suboptimal adherence to antiretroviral (ARV) therapy can lead to insufficient drug exposure leading to viral rebound and increased likelihood of resistance. This has driven the development of long-acting injectable (LAI) formulations which may mitigate some of these problems. Maraviroc (MVC) is an orally dosed CCR5 antagonist approved for use in patients infected with CCR5-trophic HIV-1. MVC prevents viral entry into host cells, is readily distributed to biologically relevant tissues and has an alternative resistance profile compared to more commonly used therapies...
April 20, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29684507/angiotensin-ii-type-1a-receptors-in-the-subfornical-organ-modulate-neuroinflammation-in-the-hypothalamic-paraventricular-nucleus-in-heart-failure-rats
#16
Yang Yu, Shun-Guang Wei, Robert M Weiss, Robert B Felder
Inflammation in the hypothalamic paraventricular nucleus (PVN) contributes to neurohumoral excitation and its adverse consequences in systolic heart failure (HF). The stimuli that trigger inflammation in the PVN in HF are not well understood. Angiotensin II (AngII) has pro-inflammatory effects, and circulating levels of AngII increase in HF. The subfornical organ (SFO), a circumventricular structure that lacks an effective blood-brain barrier and senses circulating AngII, contains PVN-projecting neurons. We hypothesized that activation of AngII type 1a receptors (AT1a R) in the SFO induces neuroinflammation downstream in the PVN...
April 20, 2018: Neuroscience
https://www.readbyqxmd.com/read/29684472/reserpine-induced-depression-is-associated-in-female-but-not-in-male-adolescent-rats-with-heightened-fluoxetine-sensitive-ethanol-consumption
#17
Paul Ruiz, Aldo Calliari, Ricardo Marcos Pautassi
Depression usually emerges during adolescence, is significantly more frequent in women, and exhibits comorbidity with alcohol (ethanol) use disorders. Most of the pre-clinical studies assessing the link between depression and ethanol intake, however, have employed only males or relied on stress-induced depression, or induced the experimentally-induced, depressive-like phenotype, during adolescence yet measured ethanol intake at adulthood. This study assessed, in Wistar male and female adolescent rats, the effects of inducing experimental depression (via administration of 1...
April 20, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29684471/glucocorticoid-receptors-in-the-basolateral-amygdala-mediated-the-restraint-stress-induced-reinstatement-of-methamphetamine-seeking-behaviors-in-rats
#18
Zahra Taslimi, Abdolrahman Sarihi, Abbas Haghparast
Methamphetamine (METH) addiction is a growing epidemic worldwide. It is a common psychiatric disease and stress has an important role in the drug seeking and relapse behaviors. The involvement of the basolateral amygdala (BLA) in effects of stress on the reward pathway has been discussed in several studies. In this study, we tried to find out the involvement of glucocorticoid receptors (GRs) in the BLA in stress-induced reinstatement of the extinguished METH-induced conditioned place preference (CPP) in rats...
April 20, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29684470/acute-stress-but-not-corticosterone-facilitates-acquisition-of-paired-associates-learning-in-rats-using-touchscreen-equipped-operant-conditioning-chambers
#19
Andrew J Roebuck, Max C Liu, Brittney R Lins, Gavin A Scott, John G Howland
Acute stress influences learning and memory in humans and rodents, enhancing performance in some tasks while impairing it in others. Typically, subjects preferentially employ striatal-mediated stimulus-response strategies in spatial memory tasks following stress, making use of fewer hippocampal-based strategies which may be more cognitively demanding. Previous research demonstrated that the acquisition of rodent paired associates learning (PAL) relies primarily on the striatum, while task performance after extensive training is impaired by hippocampal disruption...
April 20, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29684446/angiotensin-receptor-blocker-losartan-ameliorates-neuroinflammation-and-behavioral-consequences-of-lipopolysaccharide-injection
#20
Hossein Salmani, Mahmoud Hosseini, Farimah Beheshti, Yousef Baghcheghi, Hamid Reza Sadeghnia, Mohammad Soukhtanloo, Mohammad Naser Shafei, Majid Khazaei
AIMS: Neuroinflammation has a critical role in brain diseases. Angiotensin II (Ang II) is an important player in inflammation via stimulating of Ang II type 1 receptor (AT1R). In this study, the effects of losartan, an Ang II receptor blocker, on the brain inflammation, oxidative stress and behavioral consequences of lipopolysaccharide (LPS) injection were investigated. MAIN METHODS: Rats were intraperitoneally (i.p.) injected with 1 or 3 mg/kg losartan or saline for 24 continuous days...
April 20, 2018: Life Sciences
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