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Experimental Animals

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https://www.readbyqxmd.com/read/29187700/sevoflurane-preconditioning-ameliorates-lipopolysaccharide-induced-cognitive-impairment-in-mice
#1
Maiko Satomoto, Zhongliang Sun, Yushi U Adachi, Hiroyuki Kinoshita, Koshi Makita
Systemic inflammation induces brain neuronal inflammation, in turn causing acute cognitive disorders. Furthermore, neuronal inflammation is one cause of postoperative cognitive disorder (POCD) and delirium. However, no sufficiently established pharmacological treatment is available for neurocognitive inflammation. This study evaluated the possible neuroprotective effects of preconditioning with sevoflurane anesthesia on cognition and neuroinflammatory changes in an animal model of lipopolysaccharide (LPS)-induced systemic inflammation...
November 29, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29187699/establishment-of-an-alzheimer-s-disease-model-with-latent-herpesvirus-infection-using-ps2-and-tg2576-double-transgenic-mice
#2
Seiichi Tanaka, Hiroshi Nagashima
A relationship between Alzheimer's disease and herpes simplex virus infection has been pointed out. We established a model of Alzheimer's disease with a latent herpesvirus infection using a mouse model of Alzheimer's disease (PS2Tg2576) and examined the changes in amyloid β (Aβ) in the brain. We crossbred female PS2 mice with male Tg2576 hemi mice and chose PS2Tg2576 mice. After priming 5-week-old male mice with anti-pseudorabies virus swine serum, we challenged the mouse with 100 LD50 of YS-81, a wild-type strain of pseudorabies virus...
November 29, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29176298/smaller-effect-of-propofol-than-sevoflurane-anesthesia-on-dopamine-turnover-induced-by-methamphetamine-and-nomifensine-in-the-rat-striatum-an-in-vivo-microdialysis-study
#3
Saori Taharabaru, Maiko Satomoto, Takahiro Tamura, Yushi U Adachi
Volatile anesthetics accelerate dopamine turnover in the brain, especially when used in conjunction with psychotropic agents such as methamphetamine and nomifensine. The effect of intravenous propofol anesthesia on the extracellular dopamine concentrations is unclear. The aim of this study was to compare the effect of two anesthetics on the extracellular concentrations of dopamine and metabolites using an in vivo microdialysis model. Male Sprague Dawley rats were implanted with a microdialysis probe into the right striatum...
November 23, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29162767/an-increasing-electromechanical-window-is-a-predictive-marker-of-ventricular-fibrillation-in-anesthetized-rabbit-with-ischemic-heart
#4
Vudhiporn Limprasutr, Prapawadee Pirintr, Anusak Kijtawornrat, Robert L Hamlin
The QTc interval is widely used in Safety Pharmacological studies to predict arrhythmia risk, and the electromechanical window (EMW) and short-term variability of QT intervals (STVQT) have been studied as new biomarkers for drug-induced Torsades de Pointes (TdP). However, the use of EMW and STVQT to predict ventricular fibrillation (VF) has not been elucidated. This study aimed to evaluate EMW and STVQT to predict VF in anesthetized rabbit model of VF. VF was induced by ligation of the left anterior descending and a descending branch of the left circumflex coronary arteries in a sample population of rabbits (n=18)...
November 21, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29162766/production-and-rearing-of-germ-free-x-scid-pigs
#5
Hiromasa Hara, Hiroaki Shibata, Kazuaki Nakano, Tomoyuki Abe, Hideki Uosaki, Takahiro Ohnuki, Shuji Hishikawa, Satoshi Kunita, Masahito Watanabe, Osamu Nureki, Hiroshi Nagashima, Yutaka Hanazono
Pigs with X-linked severe combined immunodeficiency (X-SCID) caused by a mutation of the interleukin-2 receptor gamma chain gene (IL2RG) are of value for a wide range of studies. However, they do not survive longer than 8 weeks because of their susceptibility to infections. To allow longer survival of X-SCID pigs, the animals must be born and reared under germ-free conditions. Here, we established an efficient system for piglet derivation by hysterectomy and used it to obtain and maintain a germ-free X-SCID pig...
November 21, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29151452/development-of-a-new-diet-induced-obesity-dio-model-using-wistar-lean-rats
#6
Yoriko Kimura, Atsushi Yamada, Yoko Takabayashi, Tsunehiko Tsubota, Hisao Kasuga
Obesity is an increasingly severe socioeconomic health issue worldwide. Rodents with diet-induced obesity (DIO) are widely used as models of obesity. The main aim of this study was to establish a DIO model using Wistar lean (+/+ or +/-) rats by feeding a high-fat diet (45 kcal% fat) to dams during the latter term of gestation and the lactation period. A second aim was to examine the effect of post-weaning nutrition independently of maternal nutrition. Some pups (group D) were fed the same high-fat diet after weaning, while others (group C) were fed a chow diet after weaning...
November 17, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29129847/effects-of-ketoconazole-on-cyclophosphamide-metabolism-evaluation-of-cyp3a4-inhibition-effect-using-the-in-vitro-and-in-vivo-models
#7
Le Yang, Chenyang Yan, Feng Zhang, Bo Jiang, Shouhong Gao, Youtian Liang, Lifeng Huang, Wansheng Chen
Cyclophosphamide (CP) is widely used in anticancer therapy regimens and 2-dechloroethylcyclophosphamide (DECP) is its side-chain dechloroethylated metabolite. N-dechloroethylation of CP mediated by the enzyme CYP3A4 yields nephrotoxic and neurotoxic chloroacetaldehyde (CAA) in equimolar amount to DECP. This study aimed to evaluate the inhibitory effect of ketoconazole (KTZ) on CP metabolism through in vitro and in vivo drug-drug interaction (DDI) research. Long-term treatment of KTZ induces hepatic injury; thus single doses of KTZ at low, middle, and high levels (10, 20, and 40 mg/kg) were investigated for pharmacokinetic DDI with CP...
November 13, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29093428/danshen-attenuates-cartilage-injuries-in-osteoarthritis-in-vivo-and-in-vitro-by-activating-jak2-stat3-and-akt-pathways
#8
Xilin Xu, Hang Lv, Xiaodong Li, Hui Su, Xiaofeng Zhang, Jun Yang
Articular cartilage degradation is a main feature of osteoarthritis (OA). The effects of Danshen, a traditional Chinese herb, in mitigating cartilage damage have been reported before. This study was conducted to investigate the effects of Danshen on cartilage injuries in OA. Rabbit OA models were established by surgical destabilization of the medial meniscus and the anterior and posterior cruciate ligaments in the left knee joint. Injection of Danshen into the articular cavity attenuated OA cartilage destruction in vivo...
October 31, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29081441/amyloidosis-inducing-activity-of-blood-cells-in-mouse-aapoaii-amyloidosis
#9
Xin Ding, Yingye Liu, Mu Yang, Lin Li, Hiroki Miyahara, Jian Dai, Zhe Xu, Kiyoshi Matsumoto, Masayuki Mori, Keiichi Higuchi, Jinko Sawashita
Mouse senile amyloidosis is a disorder in which apolipoprotein A-II (APOA2) deposits as amyloid fibrils (AApoAII) in many organs. We previously reported that AApoAII amyloidosis can be transmitted by feces, milk, saliva and muscle originating from mice with amyloid deposition. In this study, the ability of blood components to transmit amyloidosis was evaluated in our model system. Blood samples were collected from SAMR1.SAMP1-Apoa2(c) amyloid-laden or amyloidosis-negative mice. The samples were fractionated into plasma, white blood cell (WBC) and red blood cell (RBC) fractions...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29081454/assessment-of-liver-fibrosis-by-ultrasound-elastography-and-contrast-enhanced-ultrasound-a-randomized-prospective-animal-study
#10
Tingting Qiu, Hong Wang, Jinzhen Song, Wenwu Ling, Yujun Shi, Gang Guo, Yan Luo
This study aimed to assess liver fibrosis by contrast-enhanced ultrasound (CEUS) and point shear-wave elastography (pSWE) in rabbits and compare the performance of the two techniques. Eighty rabbits were divided into experimental (n=60) and control group (n=20). In the experimental group, liver fibrosis (F1-F4) was induced by subcutaneous injection of carbon tetrachloride. CEUS and pSWE of the liver was performed for the two groups at a 4-week interval for 40 weeks. The portal vein rise time (PV-RT), time to peak (PV-TTP), mean transit time (PV-MTT) and the maximum signal intensity (PV-Imax) were analyzed with time-intensity curves (TICs)...
October 27, 2017: Experimental Animals
https://www.readbyqxmd.com/read/29046492/newly-breeding-an-inbred-strain-of-ischemia-prone-mongolian-gerbils-and-its-reproduction-and-genetic-characteristics
#11
Xiaoyan DU, Dongping Wang, Ying Li, Xueyun Huo, Changlong Li, Jing Lu, Ying Wang, Meng Guo, Zhenwen Chen
The Mongolian gerbil has been a useful laboratory animal in many research fields, especially in ischemia studies. However, due to the variation of the circle of Willis (COW), the ischemic model is unstable and various. To solve this problem, we newly established an inbred strain of gerbils, restricting breeding and keeping to F23. The data on the breeding and growth of the animals are described in the present study. The genetic characteristics of F4 to F20 detected by microsatellite DNA and biochemical markers are also shown here...
October 17, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28993564/swine-used-in-the-medical-university-overview-of-20-years-of-experience
#12
Eiji Kobayashi, Yutaka Hanazono, Satoshi Kunita
Center for Development of Advanced Medical Technology (CDAMTec) in Jichi Medical University was established in FY 2009. It is the first educational research facility specialized for medical research and training using swine in Japan. Preclinical studies on large animals are essential prior to clinical trials to develop regenerative medical products and medical equipment. We have continued comprehensively considering using miniature swine for experiments to develop advanced medical technologies and train physicians with advanced clinical abilities, while paying attention to animal welfare...
October 7, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28717054/simple-generation-of-hairless-mice-for-in-vivo-imaging
#13
Yoshikazu Hoshino, Seiya Mizuno, Kanako Kato, Saori Mizuno-Iijima, Yoko Tanimoto, Miyuki Ishida, Noriko Kajiwara, Tomoki Sakasai, Yoshihiro Miwa, Satoru Takahashi, Ken-Ichi Yagami, Fumihiro Sugiyama
The in vivo imaging of mice makes it possible to analyze disease progress non-invasively through reporter gene expression. As the removal of hair improves the accuracy of in vivo imaging, gene-modified mice with a reporter gene are often crossed with Hos:HR-1 mutant mice homozygous for the spontaneous Hr(hr) mutation that exhibit a hair loss phenotype. However, it is time consuming to produce mice carrying both the reporter gene and mutant Hr(hr) gene by mating. In addition, there is a risk that genetic background of the gene-modified mice would be altered by mating...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28701621/antipsychotic-like-activity-of-scopoletin-and-rutin-against-the-positive-symptoms-of-schizophrenia-in-mouse-models
#14
Vijayapandi Pandy, Kamini Vijeepallam
In an earlier report, we demonstrated an antipsychotic-like activity of a methanolic extract of Morinda citrifolia Linn fruit in mouse models and postulated the contribution of its bioactive principles, scopoletin and rutin. Moreover, the antidopaminergic activities of scopoletin and rutin were reported in isolated vas deferens preparations. In the present study, scopoletin and rutin were assessed for antipsychotic-like activity using apomorphine-induced climbing behavior and methamphetamine-induced stereotypy in mice...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28701620/comparative-analysis-of-the-intestinal-flora-in-type-2-diabetes-and-nondiabetic-mice
#15
Masanori Horie, Takamasa Miura, Satomi Hirakata, Akira Hosoyama, Sakiko Sugino, Aya Umeno, Kazutoshi Murotomi, Yasukazu Yoshida, Taisuke Koike
A relationship between type 2 diabetes mellitus (T2DM) and intestinal flora has been suggested since development of analysis technology for intestinal flora. An animal model of T2DM is important for investigation of T2DM. Although there are some animal models of T2DM, a comparison of the intestinal flora of healthy animals with that of T2DM animals has not yet been reported. The intestinal flora of Tsumura Suzuki Obese Diabetes (TSOD) mice was compared with that of Tsumura, Suzuki, Non Obesity (TSNO) mice in the present study...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28679969/incidence-of-spontaneous-lymphomas-in-non-experimental-nod-shi-scid-il-2r%C3%AE-null-nog-mice
#16
Masahiko Yasuda, Tomoyuki Ogura, Takayuki Goto, Mika Yagoto, Yoko Kamai, Chie Shimomura, Nobuhito Hayashimoto, Yukito Kiyokawa, Hideki Shinohara, Riichi Takahashi, Kenji Kawai
Severely immunodeficient NOD/Shi-scid, IL-2Rγ(null) (NOG) mice provide an in vivo model for human cell/tissue transplantation studies. NOG mice were established by combining interleukin-2 receptor-γ chain knockout mice and NOD/Shi-scid mice. They exhibit a high incidence of thymic lymphomas and immunoglobulin (Ig) leakiness. In this study, we assessed the incidence of malignant lymphomas and the occurrence of leakiness in 2,184 non-experimental NOG retired breeder mice aged 16-40 weeks. We established that the total incidence of lymphomas was only 0...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28679963/transgenic-mice-display-hair-loss-and-regrowth-overexpressing-mutant-hr-gene
#17
Kuicheng Zhu, Cunshuan Xu, Jintao Zhang, Yingying Chen, Mengduan Liu
Mutations in the hairless (Hr) gene in both mice and humans have been implicated in the development of congenital atrichia, but the role of Hr in skin and hair follicle (HF) biology remains unknown. Here, we established transgenic mice (TG) overexpressing mutant Hr to investigate its specific role in the development of HF. Three transgenic lines were successfully constructed, and two of them (TG3 and TG8) displayed a pattern of hair loss and regrowth with alternation in the expression of HR protein. The mutant Hr gene inhibited the expression of the endogenous gene in transgenic individuals, which led to the development of alopecia...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28674286/evaluation-of-a-tptx-model-induced-by-ischemia
#18
Haoran Yuan, Yongzhao Shi, Yinghua Li, Lin Yang, Yan Tang, Zhiqing Hu, Ran Du, Xueqing Li, Lingbin Gu, Hui Wang, Chenhui Xi, Chenghui Tang
Parathyroidectomy (PTX), especially total parathyroidectomy (TPTX), is often recommended for severe secondary hyperparathyroidism (SHPT) if other medical treatments fail. Accurate identification and resection of parathyroid gland (PTG) tissue is the cornerstone of PTX. The establishment of a rat TPTX model would be beneficial for several applications but faces the same problems. In this experiment, we studied the mechanisms of ischemia for the accurate identification and excision of PTG tissue to establish TPTX rat models and to analyze the effects of surgical removal of PTG tissue as well as the effects of different types of water intake in rats on clinical indices...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28674285/a-high-sucrose-and-high-fat-diet-induced-the-development-of-insulin-resistance-in-the-skeletal-muscle-of-bama-miniature-pigs-through-the-akt-glut4-pathway
#19
Yaqian Liu, Jifang Yuan, Lei Xiang, Yuqiong Zhao, Miaomiao Niu, Xin Dai, Hua Chen
A high sucrose and high fat (HSHF) diet induces insulin resistance (IR) and increased susceptibility to type 2 diabetes mellitus (T2DM), but the underlying mechanisms are poorly characterized. This study aimed to investigate the molecular mechanisms by which the HSHF diet impairs insulin sensitivity in Bama miniature pigs (sus scrofa domesticus). Twelve Bama miniature pigs were randomly assigned to the control diet (CD) group (n=6) or the HSHF group (n=6) for 6 months. Biochemical parameters were measured. Western blot, RT-qPCR and immunohistochemistry were used to profile the changes of protein expression, mRNA expression and glucose transporter 4 (GLUT4) expression in skeletal muscle tissues, respectively...
October 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28674271/pharmacological-properties-of-various-anesthetic-protocols-in-10-day-old-neonatal-rats
#20
Atsushi Tsukamoto, Yui Konishi, Takako Kawakami, Chiharu Koibuchi, Reiichiro Sato, Eiichi Kanai, Tomo Inomata
In general, the anesthesia in neonates involves high risk. Although hypothermic anesthesia is recommended in rats up to the age of 7 days, neonatal anesthesia for later periods has not been standardized. The present study investigated the pharmacological properties of conventional anesthetic protocols in 10-day-old SD rats. The rats were anesthetized with four anesthetics: a combination of ketamine and xylazine (K/X); a combination of medetomidine, midazolam, and butorphanol (M/M/B); isoflurane; and sevoflurane...
October 30, 2017: Experimental Animals
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