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Articles 1 - 25 of 25
Full-Text Articles in Medicine and Health Sciences
Neuroanatomical Substrates Of The Disruptive Effect Of Olanzapine On Rat Maternal Behavior As Revealed By C-Fos Immunoreactivity, Changjiu Zhao, Ming Li
Neuroanatomical Substrates Of The Disruptive Effect Of Olanzapine On Rat Maternal Behavior As Revealed By C-Fos Immunoreactivity, Changjiu Zhao, Ming Li
Department of Psychology: Faculty Publications
Olanzapine is one of the most widely prescribed atypical antipsychotic drugs in the treatment of schizophrenia. Besides its well-known side effect on weight gain, it may also impair human parental behavior. In this study, we took a preclinical approach to examine the behavioral effects of olanzapine on rat maternal behavior and investigated the associated neural basis using the c-Fos immunohistochemistry. On postpartum Days 6–8, Sprague-Dawley mother rats were given a single injection of sterile water or olanzapine (1.0, 3.0 or 5.0 mg/kg, sc). Maternal behavior was tested 2 h later, after which rats were sacrificed and brain tissues were collected. …
Drug–Drug Conditioning Between Citalopram And Haloperidol Or Olanzapine In A Conditioned Avoidance Response Model: Implications For Polypharmacy In Schizophrenia, Nathan L. Sparkman, Ming Li
Drug–Drug Conditioning Between Citalopram And Haloperidol Or Olanzapine In A Conditioned Avoidance Response Model: Implications For Polypharmacy In Schizophrenia, Nathan L. Sparkman, Ming Li
Department of Psychology: Faculty Publications
Patients with schizophrenia often have anxiety and depression, and thus are treated with multiple psychotherapeutic medications. This practice of polypharmacy increases the possibility for drug–drug interactions. However, the pharmacological and behavioral mechanisms underlying drug–drug interactions in schizophrenia remain poorly understood. In the present study, we adopted a preclinical approach and examined a less known behavioral mechanism, drug–drug conditioning (DDC) between haloperidol (a typical antipsychotic) or olanzapine (atypical antipsychotic) and citalopram (a selective serotonin reuptake inhibitor). A rat two-way conditioned avoidance response paradigm was used to measure antipsychotic activity and determine how DDC may alter the antipsychotic efficacy in this model. …
Rat Brain Pro-Oxidant Effects Of Peripherally Administered 5 Nm Ceria 30 Days After Exposure, Sarita S. Hardas, Rukhsana Sultana, Govind Warrier, Mo Dan, Rebecca L. Florence, Peng Wu, Eric A. Grulke, Michael T. Tseng, Jason M. Unrine, Uschi M. Graham, Robert A. Yokel, D. Allan Butterfield
Rat Brain Pro-Oxidant Effects Of Peripherally Administered 5 Nm Ceria 30 Days After Exposure, Sarita S. Hardas, Rukhsana Sultana, Govind Warrier, Mo Dan, Rebecca L. Florence, Peng Wu, Eric A. Grulke, Michael T. Tseng, Jason M. Unrine, Uschi M. Graham, Robert A. Yokel, D. Allan Butterfield
Chemistry Faculty Publications
The objective of this study was to determine the residual pro-or anti-oxidant effects in rat brain 30 days after systemic administration of a 5 nm citrate-stabilized ceria dispersion. A ∼4% aqueous ceria dispersion was iv-infused (0 or 85 mg/kg) into rats which were terminated 30 days later. Ceria concentration, localization, and chemical speciation in the brain was assessed by inductively coupled plasma mass spectrometry (ICP-MS), light and electron microscopy (EM), and electron energy loss spectroscopy (EELS), respectively. Pro- or anti-oxidant effects were evaluated by measuring levels of protein carbonyls (PC), 3-nitrotyrosine (3NT), and protein-bound-4-hydroxy-2-trans-nonenal (HNE) in the hippocampus, cortex, and …
Effects Of Simvastatin And 6-Hydroxydopamine Lesion On Histaminergic H1 Receptor Binding In Rat Brains, C H. Hu, C Deng, Xu-Feng Huang, J Chen, Q Wang
Effects Of Simvastatin And 6-Hydroxydopamine Lesion On Histaminergic H1 Receptor Binding In Rat Brains, C H. Hu, C Deng, Xu-Feng Huang, J Chen, Q Wang
Xu-Feng Huang
No abstract provided.
Anxiolytic-Like Effects Of Noni Juice (Morinda Citrifolia L.) On The Respective Changes Of Neurotransmitters In Rat Brain In The Elevated Plus-Maze Test, Sarinee Kalandakanond-Thongsong, Jantarima Charoenphandhu
Anxiolytic-Like Effects Of Noni Juice (Morinda Citrifolia L.) On The Respective Changes Of Neurotransmitters In Rat Brain In The Elevated Plus-Maze Test, Sarinee Kalandakanond-Thongsong, Jantarima Charoenphandhu
The Thai Journal of Veterinary Medicine
Noni (Morinda citrifolia L.) has long been used to treat various conditions in folklore medicine. Presently,most studies focus on antioxidant and anti-cancer activities while it is also claimed by noni juice-consumers toproduce happiness. Mood disorders, e.g. anxiety, are symptoms that reflected the disorder of neurotransmitters, oneof the most prominent is the monoaminergic system. Anxiety affects people throughout the world; people have beenseeking medicine for treatment while natural products may also alleviate this unfavorable symptom. The presentstudy examined whether noni contained anxiolytic-like effect when tested with elevated plus-maze (EPM), a standardtest for anxiety, and whether this effect was related to change …
Safety Evaluations Of Ethanolic Extract Of Moringa Oleifera Lam. Seed In Experimental Animals, Songpol Chivapat, Pornchai Sincharoenpokai, Praw Suppajariyawat, Anudep Rungsipipat, Suphan Phattarapornchaiwat, Vanida Chantarateptawan
Safety Evaluations Of Ethanolic Extract Of Moringa Oleifera Lam. Seed In Experimental Animals, Songpol Chivapat, Pornchai Sincharoenpokai, Praw Suppajariyawat, Anudep Rungsipipat, Suphan Phattarapornchaiwat, Vanida Chantarateptawan
The Thai Journal of Veterinary Medicine
The safety of ethanolic extract from the seeds of Moringa oleifera was evaluated for its oral toxicity by acute toxicity test and subchronic toxicity study in experimental animals. The acute toxicity test in mice showed that the extract at doses ranging from 5.1 to 10.0 g/kg caused toxic signs and dose dependent mortality. Oral administration of the extract in rats at doses of 100, 500 and 1000 mg/kg/day for 90 consecutive days revealed that male rats treated with the extract at 1000 mg/kg had a significant decrease in RBC but this alteration was within rats reference range. A significant decrease …
Parametric Studies Of Antipsychotic-Induced Sensitization In The Conditioned Avoidance Response Model: Roles Of Number Of Drug Exposure, Drug Dose, And Test–Retest Interval, Natashia Swalve, Ming Li
Parametric Studies Of Antipsychotic-Induced Sensitization In The Conditioned Avoidance Response Model: Roles Of Number Of Drug Exposure, Drug Dose, And Test–Retest Interval, Natashia Swalve, Ming Li
Department of Psychology: Faculty Publications
Repeated haloperidol and olanzapine treatment produces an enhanced disruption of avoidance responding, a validated measure of antipsychotic activity. Experimental parameters affecting this sensitization-like effect have not been thoroughly examined. The present study investigated the role of three parameters (number of injections, dose, and interval between initial exposure and challenge) in antipsychotic sensitization in the conditioned avoidance response paradigm. Well-trained Sprague–Dawley rats received different numbers of drug treatment (1–5 days) or different doses of haloperidol (0.025–0.10 mg/kg, subcutaneously) or olanzapine (0.5–2.0 mg/kg, subcutaneously). After certain time intervals (4, 10 or 17 days), they were tested for the expression of haloperidol or …
Acute And Subchronic Toxicity Study Of Ardisia Ellipica Thunb. Fruit Extract, Nalinphat Saktiyasunthorn, Songpol Chivapat, Pornchai Sincharoenpokai, Anudep Rungsipipat, Nongnuth Maneechai, Boonyanee Suphaphon, Aussavashai Shuayprom
Acute And Subchronic Toxicity Study Of Ardisia Ellipica Thunb. Fruit Extract, Nalinphat Saktiyasunthorn, Songpol Chivapat, Pornchai Sincharoenpokai, Anudep Rungsipipat, Nongnuth Maneechai, Boonyanee Suphaphon, Aussavashai Shuayprom
The Thai Journal of Veterinary Medicine
Several plants species in the genus Ardisia contained various biologically active compounds. Ram Yai orPilangkasa (Ardisia elliptica Thunb.) has been used in traditional medicines. The objective of this study was to evaluatethe safety of ethanolic extract of A. elliptica fruit in animal models by oral administration. Acute toxicity test in miceby gavage the extract at each dose of 2.5 g/kg twice revealed no abnormal signs, mortality and gross lesion of vitalorgans. Subchronic toxicity study was investigated in one hundred Wistar rats separated into five groups, each oftwenty (ten males and ten females). Two control groups received distilled water and 0.5% …
Olanzapine And Risperidone Disrupt Conditioned Avoidance Responding In Phencyclidine-Pretreated Or Amphetamine-Pretreated Rats By Selectively Weakening Motivational Salience Of Conditioned Stimulus, Ming Li, Wei He, Alexa Mead
Olanzapine And Risperidone Disrupt Conditioned Avoidance Responding In Phencyclidine-Pretreated Or Amphetamine-Pretreated Rats By Selectively Weakening Motivational Salience Of Conditioned Stimulus, Ming Li, Wei He, Alexa Mead
Ming Li
The rat conditioned avoidance response model is a well-established preclinical behavioral model predictive of antipsychotic efficacy. All clinically approved antipsychotic drugs disrupt conditioned avoidance responding – a feature that distinguishes them from other psychotherapeutics. We previously showed that the typical antipsychotic drug haloperidol disrupts avoidance responding by progressively attenuating the motivational salience of the conditioned stimulus (CS) in normal rats. In this study, using two pharmacological rat models of schizophrenia [e.g. phencyclidine (PCP) or amphetamine sensitization], we examined whether atypicals such as olanzapine or risperidone disrupt avoidance responding through the same behavioral mechanism. Rats were first pretreated with PCP, amphetamine, …
Amphetamine Selectively Enhances Avoidance Responding To A Less Salient Stimulus In Rats, Ming Li, Wei He, Rebecca Munro
Amphetamine Selectively Enhances Avoidance Responding To A Less Salient Stimulus In Rats, Ming Li, Wei He, Rebecca Munro
Ming Li
This preclinical study examined the psychological processes affected by amphetamine that contribute to human psychosis. Using a novel avoidance conditioning paradigm involving two conditioned stimuli (CS) with varied salience, we found that acute amphetamine (1.5 mg/ kg, i.p.) selectively enhanced avoidance responding to a less salient stimulus, but not to a salient one. These findings suggest that elevated dopaminergic activity selectively enhances the attributions of motivational salience to a less salient stimulus, a process that may bear relevance to the development of human delusional thoughts.
An Investigation Of The Behavioral Mechanisms Of Antipsychotic Action Using A Drug-Drug Conditioning Paradigm, Ming Li, Wei He, Alexa Mead
An Investigation Of The Behavioral Mechanisms Of Antipsychotic Action Using A Drug-Drug Conditioning Paradigm, Ming Li, Wei He, Alexa Mead
Ming Li
Antipsychotic drugs at noncataleptic doses selectively suppress conditioned avoidance response in rats. In our previous study, we had used a two-way active avoidance response paradigm to show that the antipsychotic-induced interoceptive state is one of the mechanisms underlying the avoidance-disruptive effect of antipsychotics. In this study, we sought to further examine this mechanism using a novel drug-drug conditioning procedure. We made use of the fact that both the typical neuroleptic haloperidol and the atypical neuroleptic olanzapine disrupt conditioned avoidance responding, whereas chlordiazepoxide (an anxiolytic) does not. We reasoned that if the antipsychotic interoceptive state is important in causing a disruption …
Nicotine Serves As A Feature-Positive Modulator Of Pavlovian Appetitive Conditioning In Rats, M. I. Palmatier, J. L. Peterson, J. L. Wilkinson, Rick A. Bevins
Nicotine Serves As A Feature-Positive Modulator Of Pavlovian Appetitive Conditioning In Rats, M. I. Palmatier, J. L. Peterson, J. L. Wilkinson, Rick A. Bevins
Rick A. Bevins
The present experiments examined whether a nicotine state could set the occasion for a pairing between visual cues and a rewarding outcome in rats. Following nicotine administration, presentation of a conditional stimulus (CS; light-on) was followed by brief access to a sucrose solution. When saline was administered, the same CS was presented but was not followed by any consequence. In Experiment 1, two groups assessed whether rats could acquire this Pavlovian feature-positive discrimination via different training procedures. An anticipatory food-seeking conditioned response (CR) developed during the CS on nicotine sessions but not on saline sessions in both groups. In Experiment …
Individual Differences In Behavioral Responses To Novelty And Amphetamine Self-Administration In Male And Female Rats, J. E. Klebaur, Rick A. Bevins, T. M. Segar, M. T. Bardo
Individual Differences In Behavioral Responses To Novelty And Amphetamine Self-Administration In Male And Female Rats, J. E. Klebaur, Rick A. Bevins, T. M. Segar, M. T. Bardo
Rick A. Bevins
Previous work has shown that individual differences in locomotor activity in an inescapable novel environment can predict acquisition of amphetamine self-administration. The current study examined whether individual differences in approach to novelty in a free choice test could also predict amphetamine self-administration. Further, the current study examined whether individual differences in either free choice or inescapable novelty tests could predict responding for a nondrug reinforcer (sucrose) in the presence and absence of amphetamine. Male and female rats were first tested for their response to free choice novelty (playground maze and novelty-induced place preference tests) and inescapable novelty. They were then …
Individual Differences In Response To Novelty, Amphetamine-Induced Activity And Drug Discrimination In Rats, Rick A. Bevins, J. E. Klebaur, M. T. Bardo
Individual Differences In Response To Novelty, Amphetamine-Induced Activity And Drug Discrimination In Rats, Rick A. Bevins, J. E. Klebaur, M. T. Bardo
Rick A. Bevins
Rats mere pre-tested in several individual difference screens - novelty-induced activity, novelty-induced place preference, novel-object interaction, and amphetamine-induced activity. Rats that were more sensitive to the locomotor effects of amphetamine were more active in an inescapable novel environment and displayed a greater preference for a novel environment. All animals were then trained to discriminate amphetamine (1 mg/kg) from saline in a two-bar discrimination procedure using food-maintained responding. After acquisition of the discrimination (mean =37 trials), two amphetamine generalization tests (0.0625,0.125,0.25,0.5, 1.0 and 2.0 mg/kg) were conducted. In the second generalization test, rats that were more sensitive to the activating effect …
Nicotine Enhances Acquisition Of A T-Maze Visual Discrimination: Assessment Of Individual Differences, J. Besheer, Rick A. Bevins
Nicotine Enhances Acquisition Of A T-Maze Visual Discrimination: Assessment Of Individual Differences, J. Besheer, Rick A. Bevins
Rick A. Bevins
In the present report, rats' performance was assessed in five tasks designed to measure behavioral response to different novel stimuli under different experimental situations. Daily nicotine treatment (0, 0.3 or l.0 mg/kg) began after the conclusion of the behavioral tasks and continued throughout the experiment. Training of a T-maze visual discrimination task commenced after 11 days of nicotine pretreatment. As a group, rats treated with the higher dose of nicotine (l.0 mg/kg) made fewer errors to acquire the initial T-maze discrimination than saline-treated controls. Activity induced by an inescapable novel environment (i.e. first behavioral screen) was positively correlated with the …
Distribution, Elimination, And Biopersistence To 90 Days Of A Systemically Introduced 30 Nm Ceria-Engineered Nanomaterial In Rats, Robert A. Yokel, Tu C. Au, Robert Macphail, Sarita S. Hardas, D. Allan Butterfield, Rukhsana Sultana, Michael Goodman, Michael T. Tseng, Mo Dan, Hamed Haghnazar, Jason M. Unrine, Uschi M. Graham, Peng Wu, Eric A. Grulke
Distribution, Elimination, And Biopersistence To 90 Days Of A Systemically Introduced 30 Nm Ceria-Engineered Nanomaterial In Rats, Robert A. Yokel, Tu C. Au, Robert Macphail, Sarita S. Hardas, D. Allan Butterfield, Rukhsana Sultana, Michael Goodman, Michael T. Tseng, Mo Dan, Hamed Haghnazar, Jason M. Unrine, Uschi M. Graham, Peng Wu, Eric A. Grulke
Pharmaceutical Sciences Faculty Publications
Nanoceria is used as a catalyst in diesel fuel, as an abrasive in printed circuit manufacture, and is being pursued as an antioxidant therapeutic. Our objective is to extend previous findings showing that there were no reductions of cerium in organs of the mononuclear phagocyte (reticuloendothelial) system up to 30 days after a single nanoscale ceria administration. An ~5% aqueous dispersion of citrate-stabilized 30 nm ceria, synthesized and characterized in-house, or vehicle, was iv infused into rats terminated 1, 7, 30, or 90 days later. Cageside observations were obtained daily, body weight weekly. Daily urinary and fecal cerium outputs were …
Predicting Vision Loss In Healthy Aging With Manganese-Enhanced Mri Of The Rat Eye, David Bissig
Predicting Vision Loss In Healthy Aging With Manganese-Enhanced Mri Of The Rat Eye, David Bissig
Wayne State University Dissertations
In healthy aging, visual function declines throughout adulthood. Age-related changes in neuronal ion homeostasis -- specifically, increased Ca2+ influx through L-type voltage gated calcium channels (L-VGCCs) -- are believed to contribute to certain functional declines, but this possibility has not yet been tested in the neural retina. In young, mid- and old adult Long-Evans rats, we compared visual function (optokinetic tracking), as well as retinal physiology and eye morphology (Mn2+-enhanced MRI (MEMRI), which uses neuronal Mn2+ uptake as a marker of Ca2+ influx). We documented significant age-related decreases in visual performance and increases in retinal ion influx. We confirmed that …
Reducing Olanzapine-Induced Weight Gain Side-Effect By Using Betahistine: A Study In The Rat Model, Chao Deng, Jiamei Lian, Nagesh Brahmavar Pai, Xu-Feng Huang
Reducing Olanzapine-Induced Weight Gain Side-Effect By Using Betahistine: A Study In The Rat Model, Chao Deng, Jiamei Lian, Nagesh Brahmavar Pai, Xu-Feng Huang
Graduate School of Medicine - Papers (Archive)
Olanzapine is effective at treating multiple domains of schizophrenia symptoms. However, it induces serious metabolic side effects. Antipsychotic drug’s antagonistic affinity to histamine H1 receptors has been identified as a main contributor for weight gain/obesity side effects. This study therefore investigated whether a combined treatment of betahistine (a H1 receptor agonist and H3 receptor antagonist) could reduce the body weight/obesity induced by olanzapine. Female Sprague Dawley rats were treated orally with olanzapine (1 mg/kg, t.i.d.) and/or betahistine (2.67 mg/kg, t.i.d.), or vehicle for two weeks. Rats treated with olanzapine exhibited significant body weight gain and increased food intake. Co-treatment of …
Quantification Of Collagen Organization Using Fractal Dimensions And Fourier Transforms, Kayt E. Frisch, Sarah E. Duenwald-Kuehl, Hirohito Kobayashi, Connie S. Chamberlain, Roderic S. Lakes, Ray Vanderby Jr.
Quantification Of Collagen Organization Using Fractal Dimensions And Fourier Transforms, Kayt E. Frisch, Sarah E. Duenwald-Kuehl, Hirohito Kobayashi, Connie S. Chamberlain, Roderic S. Lakes, Ray Vanderby Jr.
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
Collagen fibers and fibrils that comprise tendons and ligaments are disrupted or damaged during injury. Fibrillogenesis during healing produces a matrix that is initially quite disorganized, but remodels over time to resemble, but not replicate, the original roughly parallel microstructure. Quantification of these changes is traditionally a laborious and subjective task. In this work we applied two automated techniques, fast Fourier transformation (FFT) and fractal dimension analysis (FA) to quantify the organization of collagen fibers or fibrils. Using multi-photon images of collagen fibers obtained from rat ligament we showed that for healing ligaments, FA differentiates more clearly between the different …
Differential Effects Of Acute Amphetamine And Phencyclidine Treatment And Withdrawal From Repeated Amphetamine Or Phencyclidine Treatment On Social Interaction And Social Memory In Rats, Ming Li, Wei He, Rebecca Munro
Differential Effects Of Acute Amphetamine And Phencyclidine Treatment And Withdrawal From Repeated Amphetamine Or Phencyclidine Treatment On Social Interaction And Social Memory In Rats, Ming Li, Wei He, Rebecca Munro
Department of Psychology: Faculty Publications
Although animal models based on amphetamine (AMPH) or phencyclidine (PCP) treatment have been used extensively to study the neurobiological and behavioral characteristics of schizophrenia, there are conflicting reports regarding their validity in modeling the negative symptoms and cognitive deficits of schizophrenia. The present study examined how acute AMPH or PCP treatment (Experiment 1) and withdrawal from repeated AMPH treatment (Experiment 2) or PCP treatment (Experiment 3) affects social behavior and social recognition memory in male Sprague-Dawley rats. Each subject was tested on two consecutive days. On the first day, the rats were tested four times (5 min/each) at 10-min intervals …
Contextual And Behavioral Control Of Antipsychotic Sensitization Induced By Haloperidol And Olanzapine, Chen Zhang, Ming Li
Contextual And Behavioral Control Of Antipsychotic Sensitization Induced By Haloperidol And Olanzapine, Chen Zhang, Ming Li
Department of Psychology: Faculty Publications
Repeated administration of haloperidol (HAL) and olanzapine (OLZ) causes a progressively enhanced disruption of the conditioned avoidance response (CAR) and a progressively enhanced inhibition of phencyclidine (PCP)-induced hyperlocomotion in rats (termed antipsychotic sensitization). Both actions are thought to reflect intrinsic antipsychotic activity. The present study examined the extent to which antipsychotic- induced sensitization in one model (e.g. CAR) can be transferred or maintained in another (e.g. PCP hyperlocomotion) as a means of investigating the contextual and behavioral controls of antipsychotic sensitization. Well-trained male Sprague-Dawley rats were first repeatedly tested in the CAR or the PCP (3.2 mg/kg, subcutaneously) hyperlocomotion model …
Dietary Fish Oil Preserves Cardiac Function In The Hypertrophied Rat Heart, Peter L. Mclennan, Mahainda Y. Abeywardena, Julie A. Dallimore, Daniel Raederstorff
Dietary Fish Oil Preserves Cardiac Function In The Hypertrophied Rat Heart, Peter L. Mclennan, Mahainda Y. Abeywardena, Julie A. Dallimore, Daniel Raederstorff
Graduate School of Medicine - Papers (Archive)
Regular fish or fish oil intake is associated with a low incidence of heart failure clinically, and fish oil-induced reduction in cardiac remodelling seen in hypertrophy models may contribute. We investigated whether improved cardiac energy efficiency in non-hypertrophied hearts translates into attenuation of cardiac dysfunction in hypertrophied hearts. Male Wistar rats (n 33) at 8 weeks of age were sham- operated or subjected to abdominal aortic stenosis to produce pressure-overload cardiac hypertrophy. Starting 3 weeks post-operatively to follow initiation of hypertrophy, rats were fed a diet containing 10% olive oil (control) or 5% fish oil (ROPUFA30 (17% EPA, 10% DHA)) …
Transplantation Of Undifferentiated Bone Marrow Stromal Cells Improves Sciatic Nerve Regeneration And Functional Recovery Through Inside-Out Vein Graft In Rats, Rahim Mohammadi, Saeed Azizi, Nowruz Delirezh, Rahim Hobbenaghi, Keyvan Amini
Transplantation Of Undifferentiated Bone Marrow Stromal Cells Improves Sciatic Nerve Regeneration And Functional Recovery Through Inside-Out Vein Graft In Rats, Rahim Mohammadi, Saeed Azizi, Nowruz Delirezh, Rahim Hobbenaghi, Keyvan Amini
Turkish Journal of Medical Sciences
To study the effect of undifferentiated bone marrow stromal cells (BMSCs) on peripheral nerve regeneration using a rat sciatic nerve regeneration model. In recent years, cell transplantation has become the focus of attention, and reliable outcomes have been achieved in regeneration of the sciatic nerve. Materials and methods: A 10-mm sciatic nerve defect was bridged using an inside-out vein graft (IOVG) filled with undifferentiated BMSCs (2 × 107 cells/mL). In the control group, the vein was filled with phosphate buffered saline alone. The regenerated fibers were studied 4, 8, and 12 weeks after surgery. Assessment of nerve regeneration was based …
Limb Remote Ischemic Postconditioning Is Effective But Also Time-Course-Limited In Protecting The Brain From I/R Injury, Ce Xu, Chengju Yi, Haidong Guo, Qiangqiang Liu, Li Wang, Hongxia Li
Limb Remote Ischemic Postconditioning Is Effective But Also Time-Course-Limited In Protecting The Brain From I/R Injury, Ce Xu, Chengju Yi, Haidong Guo, Qiangqiang Liu, Li Wang, Hongxia Li
Turkish Journal of Medical Sciences
To determine the effect of limb remote ischemic postconditioning (LIPoC) against cerebral ischemia reperfusion in rats and the relationship between cycle number or remote postconditioning episode duration and the protective function of LIPoC. Materials and methods: Transient focal ischemia/reperfusion was induced by 90 min of middle cerebral artery occlusion (MCAO) with nylon monofilament and 22 h of reperfusion in male Sprague-Dawley rats. The animals underwent LIPoC consisting of 1, 2, or 3 cycles, with each occlusion or release lasting for 5 min (5/5), 10 min (10/10), or 15 min (15/15) of bilateral femoral artery occlusion/release. Neurological score, infarct volume, water …
Is Grayanotoxin Directly Responsible For Mad Honey Poisoning-Associated Seizures, Abdülkadi̇r Gündüz, Murat Aydin, Metehan Akça, Süha Türkmen, Süleyman Türedi̇, Umut Eryi̇ği̇t, Ali̇ Cansu, Mehmet Yildirim
Is Grayanotoxin Directly Responsible For Mad Honey Poisoning-Associated Seizures, Abdülkadi̇r Gündüz, Murat Aydin, Metehan Akça, Süha Türkmen, Süleyman Türedi̇, Umut Eryi̇ği̇t, Ali̇ Cansu, Mehmet Yildirim
Turkish Journal of Medical Sciences
The aim of this study was to investigate the effects of grayanotoxin on epileptiform activity in rats. Materials and methods: Forty-two male Sprague Dawley rats were equally divided into 1 of 7 groups. Thirty minutes after induction of epileptiform activity induced by penicillin injection, 0.5, 1, 2, 4, or 8 µg of grayanotoxin-III was intracerebroventricularly administered. Epileptiform activity spike frequency and amplitude were converted into numerical data using software following the experiment. Results: Our results show that grayanotoxin reduces epileptiform spike frequency and amplitude in a dose-dependent manner. Five minutes postinjection, grayanotoxin significantly reduced epileptiform activity, especially at higher doses. …