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https://www.readbyqxmd.com/read/27847197/synchrotron-radiation-micro-ct-as-a-novel-tool-to-evaluate-the-effect-of-agomir-210-in-a-rat-spinal-cord-injury-model
#1
Yong Cao, Tian-Ding Wu, Hao Wu, Ye Lang, Dong-Zhe Li, Shuang-Fei Ni, Hong-Bin Lu, Jian-Zhong Hu
MicroRNA-210 (miR-210) was initially reported to be associated with hypoxia and plays a vital role in modulating angiogenesis. However, the potential effect and underlying mechanisms of miR-210 activity in rat spinal cord injury (SCI) have not yet been fully illuminated. In the present study, differential microRNA expression after SCI was determined by Microarray analysis. To explore the effect of miR-210 after SCI, we intrathecally injected agomir-210 with Alzet Osmotic Pumps to up-regulated the endogenous miR-210 expression...
November 12, 2016: Brain Research
https://www.readbyqxmd.com/read/27513841/the-effect-of-peripheral-chronic-salsolinol-administration-on-fat-pad-adipocytes-morphological-parameters
#2
Veronika Aleksandrovych, Magdalena Kurnik, Magdalena Białas, Andrzej Bugajski, Piotr Thor, Krzysztof Gil
Salsolinol (1-methyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline) is thought to regulate dopaminergic neurons and to act as a mediator in the neuroendocrine system. We have previously reported that exogenous salsolinol evokes enteric neuronal cell death, leading to the impairment of myenteric neurons density and abnormal intestinal transit in rats. We also observed significant reduction of body weight, related to the disrupted gastrointestinal homeostasis. e aim of current study was to evaluate the influence of prolonged salsolinol administration body weight, food intake, adipose tissue accumulation and fad pad adipocyte morphological parameters assessed by image analysis...
2016: Folia Medica Cracoviensia
https://www.readbyqxmd.com/read/27508651/-op-3b-02-ageing-and-lack-of-estrogens-activates-cyclooxygenases-pathway-increasing-superoxide-anion-production-in-response-to-thromboxane-a2
#3
S Novella, X Vidal-Gómez, A Mompeón, D Pérez-Cremades, G Segarra, P Medina, C Hermenegildo
OBJECTIVE: The role of ageing in the development of vascular disease is currently associated with a rise in oxidative stress. Thromboxane A2 (TXA2) is an inflammatory and oxidant endogenous vasoconstrictor which action increases with ageing and lack of estrogens, both conditions found in menopause. Our aim was to determine superoxide anion (O2-) levels in response to TXA2 in aortic vascular tissue from senescent and ovariectomized mice and the role of cyclooxygenase as source of O2-. DESIGN AND METHOD: Senescence accelerated mice (SAM) were used in this study...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27379984/in-vivo-use-of-the-cyp-inhibitor-1-aminobenzotriazole-to-increase-long-term-exposure-in-mice
#4
Ayahisa Watanabe, Kei Mayumi, Kyohei Nishimura, Hiromi Osaki
1-Aminobenzotriazole (ABT) is a well-known in vivo nonspecific inhibitor of cytochrome P450 (CYP) enzymes. An effective dosing regimen of ABT for a multiple-administration study is needed to conduct pharmacological studies for proof-of-concept, although it has been established for single-administration study, to characterize the pharmacokinetics of drug candidates. This study demonstrated a suitable dosing vehicle of ABT for continuous administration and increased exposure to antipyrine, which is a nonspecific probe of CYP, using ABT for a long period in mice...
September 2016: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/26945602/surgery-accelerates-the-development-of-endometriosis-in%C3%A2-mice
#5
Qiqi Long, Xishi Liu, Sun-Wei Guo
BACKGROUND: Surgery is currently the mainstay treatment for solid tumors and many benign diseases, including endometriosis, and women tend to receive substantially more surgeries than men mainly because of gynecological and cosmetic surgeries. Despite its cosmetic, therapeutic, or even life-saving benefits, surgery is reported to increase the cancer risk and promotes cancer metastasis. Surgery activates adrenergic signaling, which in turn suppresses cell-mediated immunity and promotes angiogenesis and metastasis...
September 2016: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/26845248/role-of-%C3%AE-1d-adrenoceptors-in-vascular-wall-hypertrophy-during-angiotensin-ii-induced-hypertension
#6
I A Gallardo-Ortíz, S N Rodríguez-Hernández, J J López-Guerrero, L Del Valle-Mondragón, P López-Sánchez, R M Touyz, R Villalobos-Molina
The in vivo effect of continuous angiotensin II (Ang II) infusion on arterial blood pressure, vascular hypertrophy and α1 -adrenoceptors (α1 -ARs) expression was explored. Alzet(®) minipumps filled with Ang II (200 ng kg(-1)  min(-1) ) were subcutaneously implanted in male Wistar rats (3 months-old). Groups of rats were also treated with losartan, an AT1 R antagonist, or with BMY 7378, a selective α1D -AR antagonist. Blood pressure was measured by tail-cuff; after 2 or 4 weeks of treatment, vessels were isolated for functional and structural analyses...
September 2015: Autonomic & Autacoid Pharmacology
https://www.readbyqxmd.com/read/26780497/role-of-p-glycoprotein-in-mediating-rivastigmine-effect-on-amyloid-%C3%AE-brain-load-and-related-pathology-in-alzheimer-s-disease-mouse-model
#7
Loqman A Mohamed, Jeffrey N Keller, Amal Kaddoumi
Recently, we showed that rivastigmine decreased amyloid-β (Aβ) brain load in aged rats by enhancing its clearance across the blood-brain barrier (BBB) via upregulation of P-glycoprotein (P-gp) and low-density lipoprotein receptor-related protein 1 (LRP1). Here, we extend our previous work to clarify P-gp role in mediating rivastigmine effect on Aβ brain levels and neuroprotection in a mouse model of Alzheimer's disease (AD) that expresses different levels of P-gp. APPSWE mice were bred with mdr1a/b knockout mice to produce littermates that were divided into three groups; APP(+)/mdr1(+/+), APP(+)/mdr1(+/-) and APP(+)/mdr1(-/-)...
April 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/26646764/pyrroloquinoline-quinone-resists-denervation-induced-skeletal-muscle-atrophy-by-activating-pgc-1%C3%AE-and-integrating-mitochondrial-electron-transport-chain-complexes
#8
Yung-Ting Kuo, Ping-Hsiao Shih, Shu-Huei Kao, Geng-Chang Yeh, Horng-Mo Lee
Denervation-mediated skeletal muscle atrophy results from the loss of electric stimulation and leads to protein degradation, which is critically regulated by the well-confirmed transcriptional co-activator peroxisome proliferator co-activator 1 alpha (PGC-1α). No adequate treatments of muscle wasting are available. Pyrroloquinoline quinone (PQQ), a naturally occurring antioxidant component with multiple functions including mitochondrial modulation, demonstrates the ability to protect against muscle dysfunction...
2015: PloS One
https://www.readbyqxmd.com/read/26635633/methylprednisolone-protects-cardiac-pumping-mechanics-from-deteriorating-in-lipopolysaccharide-treated-rats
#9
Ya-Hui Ko, Ming-Shian Tsai, Ru-Wen Chang, Chun-Yi Chang, Chih-Hsien Wang, Ming-Shiou Wu, Jin-Tung Liang, Kuo-Chu Chang
It has been shown that a prolonged low-dose corticosteroid treatment attenuates the severity of inflammation and the intensity and duration of organ system failure. In the present study, we determined whether low-dose methylprednisolone (a synthetic glucocorticoid) can protect male Wistar rats against cardiac pumping defects caused by lipopolysaccharide-induced chronic inflammation. For the induction of chronic inflammation, a slow-release ALZET osmotic pump was subcutaneously implanted to infuse lipopolysaccharide (1 mg kg(-1) d(-1)) for 2 weeks...
2015: Frontiers in Physiology
https://www.readbyqxmd.com/read/26607251/bdnf-levels-are-increased-by-aminoindan-and-rasagiline-in-a-double-lesion-model-of-parkinson-s-disease
#10
Aurélie Ledreux, Heather A Boger, Vanessa K Hinson, Kelsey Cantwell, Ann-Charlotte Granholm
The anti-Parkinsonian drug rasagiline is a selective, irreversible inhibitor of monoamine oxidase and is used in the treatment of Parkinson׳s disease (PD). Its postulated neuroprotective effects may be attributed to MAO inhibition, or to its propargylamine moiety. The major metabolite of rasagiline, aminoindan, has shown promising neuroprotective properties in vitro but there is a paucity of studies investigating in vivo effects of this compound. Therefore, we examined neuroprotective effects of rasagiline and its metabolite aminoindan in a double lesion model of PD...
January 15, 2016: Brain Research
https://www.readbyqxmd.com/read/26584015/trenbolone-improves-cardiometabolic-risk-factors-and-myocardial-tolerance-to-ischemia-reperfusion-in-male-rats-with-testosterone-deficient-metabolic-syndrome
#11
Daniel G Donner, Grace E Elliott, Belinda R Beck, Andrew C Bulmer, Alfred K Lam, John P Headrick, Eugene F Du Toit
The increasing prevalence of obesity adds another dimension to the pathophysiology of testosterone (TEST) deficiency (TD) and potentially impairs the therapeutic efficacy of classical TEST replacement therapy. We investigated the therapeutic effects of selective androgen receptor modulation with trenbolone (TREN) in a model of TD with the metabolic syndrome (MetS). Male Wistar rats (n=50) were fed either a control standard rat chow (CTRL) or a high-fat/high-sucrose (HF/HS) diet. After 8 weeks of feeding, rats underwent sham surgery or an orchiectomy (ORX)...
January 2016: Endocrinology
https://www.readbyqxmd.com/read/26529542/interaction-between-methylphenidate-methadone-and-different-antidepressant-drugs-on-antinociception-in-mice-and-possible-clinical-implications
#12
Shaul Schreiber, Miaad Bader, Vardit Rubovitch, Chaim G Pick
OBJECTIVES: Methylphenidate (MPH), a psychostimulant used for treatment of attention deficit hyperactivity disorder (ADHD), is widely used by patients on antidepressants and methadone maintenance treatment (MMT). Preclinical studies showed MPH to exert analgesic effects when given alone or with morphine. METHODS: Using the hotplate assay on mice, we studied the interaction of acute doses of MPH with sub-threshold doses of methadone and different antidepressant medications and the interaction of increasing doses of MPH with chronic methadone...
November 3, 2015: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/26189092/inhibition-of-tnf-%C3%AE-r1-signaling-can-rescue-functional-cortical-plasticity-impaired-in-early-post-stroke-period
#13
Monika Liguz-Lecznar, Renata Zakrzewska, Malgorzata Kossut
Tumor necrosis factor-α (TNF-α) is one of the key players in stroke progression and can interfere with brain functioning. We previously documented an impairment of experience-dependent plasticity in the cortex neighboring the stroke-induced lesion, which was accompanied with an upregulation of Tnf-α level in the brain of ischemic mice 1 week after the stroke. Because TNF receptor 1 (TnfR1) signaling is believed to be a major mediator of the cytotoxicity of Tnf-α through activation of caspases, we used an anti-inflammatory intervention aimed at Tnf-α R1 pathway, in order to try to attenuate the detrimental effect of post-stroke inflammation, and investigated if this will be effective in protecting plasticity in the infarct proximity...
October 2015: Neurobiology of Aging
https://www.readbyqxmd.com/read/26149233/the-effects-of-intracerebroventricular-infusion-of-apelin-13-on-reproductive-function-in-male-rats
#14
Suleyman Sandal, Suat Tekin, Fatma Burcu Seker, Ali Beytur, Nigar Vardi, Cemil Colak, Tuba Tapan, Sedat Yildiz, Bayram Yilmaz
Apelin is a novel bioactive peptide as the endogenous ligand for APJ. Apelin and APJ have also been identified in the testis, hypothalamic nuclei such as arcuate, supraoptic and paraventricular nuclei, implicating roles in the control of reproduction. Therefore, the present study was designed to investigate the effects of chronic central infusion of apelin-13 on LH, FSH and testosterone levels and testis morphology. 21 Wistar-Albino male rats received continuous intracerebroventricular infusion via Alzet osmotic mini pumps filled artificial cerebrospinal fluid (vehicle) or apelin-13 at concentrations of 1 or 10 nmol (10 μl/h) for seven days...
August 18, 2015: Neuroscience Letters
https://www.readbyqxmd.com/read/26146041/-the-effect-of-gene-therapy-with-the-apoe3-gene-on-structural-and-functional-manifestations-of-secondary-hippocampal-damages-in-experimental-traumatic-brain-injury
#15
E G Pedachenko, V V Beloshytsky, S A Mikhal'sky, N Ya Gridina, T Yu Kvitnitskaya-Ryzhova
AIM OF THE STUDY: to study the efficiency of gene therapy following traumatic brain injury (TBI) by evaluating the influences of liposomal transfection of the brain tissue by APOE3-containing plasmid vector on the structural and functional manifestations of development of secondary brain injuries after acute experimental TBI in the rats of different age. MATERIAL AND METHODS: Severe diffuse TBI in rats was inflicted under overall anesthesia by free load weighing 450 g, falling from a 1...
2015: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/26044561/application-of-chemokine-receptor-antagonist-with-stents-reduces-local-inflammation-and-suppresses-cancer-growth
#16
Ai-Wu Mao, Ting-Hui Jiang, Xian-Jun Sun, Jian Peng
Severe pain and obstructive jaundice resulting from invasive cholangiocarcinoma or pancreatic carcinoma can be alleviated by implantation of biliary and duodenal stents. However, stents may cause local inflammation to have an adverse effect on the patients' condition and survival. So far, no efficient approaches have been applied to prevent the occurrence of stents-related inflammation. Here, we reported significantly higher levels of serum stromal cell-derived factor 1 (SDF-1) in the patients that developed stents-associated inflammation...
November 2015: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/25964109/role-of-lipocalin-type-prostaglandin-d2-synthase-l-pgds-and-its-metabolite-prostaglandin-d2-in-preterm-birth
#17
Sunil Kumar, Thomas Palaia, Christopher E Hall, Louis Ragolia
The objective of the study was to investigate the role of prostaglandin D2 during pregnancy and its mediator Lipocalin-type prostaglandin D2 synthase (L-PGDS) as a predictor of preterm birth (PTB). Transgenic L-PGDS (+/+), L-PGDS (-/-) and C57BL/6 control pregnant mice models were used to determine the effect of DP1 and DP2 receptor antagonists in lipopolysaccharide (LPS)-induced PTB mice. In addition, L-PGDS levels were measured in the cervicovaginal secretions (CVS) of 370 pregnant women using ELISA and further processed for isoform detection using 2-D gel electrophoresis...
April 2015: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/25800953/analgesia-in-mice-with-experimental-meningitis-reduces-pain-without-altering-immune-parameters
#18
Sarah Mundt, Marcus Groettrup, Michael Basler
Intracranial lymphocytic choriomeningitis virus (LCMV) infection is a widely used animal model to study virus-induced cytotoxic T cell (CTL) mediated meningitis and immunopathology. Nevertheless, this model causes severe pain and distress in mice, especially at later stages of the disease. Therefore, new treatment regimens to improve animal welfare have to be developed. In this study, we subcutaneously implanted ALZET® osmotic pumps continuously releasing buprenorphine to reduce pain in mice with LCMV-induced meningitis...
2015: ALTEX
https://www.readbyqxmd.com/read/25793992/oral-nasal-and-pharyngeal-exposure-to-lipopolysaccharide-causes-a-fetal-inflammatory-response-in-sheep
#19
Gunlawadee Maneenil, Matthew W Kemp, Paranthaman Senthamarai Kannan, Boris W Kramer, Masatoshi Saito, John P Newnham, Alan H Jobe, Suhas G Kallapur
BACKGROUND: A fetal inflammatory response (FIR) in sheep can be induced by intraamniotic or selective exposure of the fetal lung or gut to lipopolysaccharide (LPS). The oral, nasal, and pharyngeal cavities (ONP) contain lymphoid tissue and epithelium that are in contact with the amniotic fluid. The ability of the ONP epithelium and lymphoid tissue to initiate a FIR is unknown. OBJECTIVE: To determine if FIR occurs after selective ONP exposure to LPS in fetal sheep...
2015: PloS One
https://www.readbyqxmd.com/read/25727230/effects-of-convection-enhanced-delivery-of-bevacizumab-on-survival-of-glioma-bearing-animals
#20
Weijun Wang, Walavan Sivakumar, Shering Torres, Niyati Jhaveri, Vijaya Pooja Vaikari, Alex Gong, Adam Howard, Encouse B Golden, Stan G Louie, Axel H Schönthal, Florence M Hofman, Thomas C Chen
OBJECT Bevacizumab (Avastin), an antibody to vascular endothelial growth factor (VEGF), alone or in combination with irinotecan (Camptosar [CPT-11]), is a promising treatment for recurrent glioblastoma. However, the intravenous (IV) administration of bevacizumab produces a number of systemic side effects, and the increase in survival it provides for patients with recurrent glioblastoma is still only a few months. Because bevacizumab is an antibody against VEGF, which is secreted into the extracellular milieu by glioma cells, the authors hypothesized that direct chronic intratumoral delivery techniques (i...
March 2015: Neurosurgical Focus
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