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Ca2＋-induced Ca2＋ Release from Internal Stores in INS-1 Rat Insulinoma Cells
KyungJinChoi, DongSuCho, JuYoungKim, ByungJoonKim, KyungMooLee, ShinHyeKim, DongKwanKim, SeHoonKim, HyungSeoPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.1 8 53-60 (8 pages)
de plete internal Ca 2＋ stores by repetitive stimulation. To determine the involvement of RyRs, we added ruthenium red, a RyRs blocker, to the perfusion medium. Ruthenium red marked ly reduced the caffeine-in- duced [Ca 2＋ ]i peak to 11.60±2.09% of control value in the absence of extracellular Ca 2＋ (Fig. 1C). These results sug- gest that caffeine can mobilize Ca 2＋ from internal stores... of Ca2＋ through voltage-dependent Ca2＋ channels. The resulting elevation of intracellular calcium ([Ca2＋]i) triggers additional Ca2＋ release from internal stores. Less well understood are the mechanisms involved in Ca2＋ mobilization from internal stores after activation of Ca2＋ influx. The mobilization process is known as calcium-induced calcium release (CICR). In this study, our goal was to investigate the existence of and the role of caffeine-sensitive ryanodine receptors (RyRs) in a rat... -
Quantitative evaluation of renal parenchymal perfusion using contrast-enhanced ultrasonography in renal ischemia-reperfusion injury in dogs
Gahyun Lee, Sunghoon Jeon, Sang-kwon Lee, Byunggyu Cheon, Sohyeon Moon, Jun-Gyu Park, Kyoung-Oh Cho, Jihye Choi 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2017, 제 18권 제 4호 16 507-514 (8 pages)
assay Persistent Mullerian duct syndrome (PMDS) is an inherited autosomal recessive disorder of male pseudohermaphroditism characterized by the presence of Mullerian duct derivatives [3]. Female internal genitalia, including uterus and vagina, are observed in PMDS males because Mullerian duct regression does not occur [1]. The major etiological cause of PMDS in Miniature Schnauzers is a C to... This study evaluated whether renal perfusion changes can be noninvasively estimated by using contrast-enhanced ultrasonography (CEUS) in renal ischemia-reperfusion injury and investigated the correlation between renal perfusion measured by CEUS and necrosis and apoptosis of renal tubular epithelial cells. In six dogs with experimentally induced renal ischemia-reperfusion injury, changes in time to peak intensity, peak intensity, and area under the curve were measured on CEUS. Peak intensity and... -
Changes in hoof kinetics and kinematics at walk in response to hoof trimming
Babak Faramarzi, An Nguyen, Fanglong Dong 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 4호 12 557-562 (6 pages)
it has been shown that proper contact with the surface may improve foot vascular perfusion [3]. It is possible that changes in hoof conformation after trimming improved the force and pressure distribution. Stride length was not measured in this study; however, since velocities were comparable, and gait-cycle duration decreased after trimming, it can be concluded that stride length might have... Appropriate hoof preparation and symmetry are linked to the well-being of the horse. Previous studies have shown the efficacy of pressure plates (PPs) in delivering objective biomechanical analysis. We aimed to assess the effect of hoof trimming on hoof biomechanics using a PP. Nine clinically sound Arabian horses were walked across a PP while foot strike was recorded by a digital camera. Kinetic and kinematic parameters were recorded before and after trimming. Changes were considered... -
Calcium-sensing receptor-mediated L-tryptophan-induced secretion of cholecystokinin and glucose-dependent insulinotropic peptide in swine duodenum
Xiuying Zhao, Yihan Xian, Chao Wang, Liren Ding, Xianglong Meng, Weiyun Zhu, Suqin Hang 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 2호 4 179-187 (9 pages)
perfusion. CaSR (A) mRNA expression was analyzed by quantitative polymerase chain reaction (qPCR) and glyceraldehyde phosphate dehydrogenase was used as the internal control. The concentrations of cholecystokinin (CCK, B) and glucose-dependent insulinotropic peptide (GIP, C) in the perfusate samples were detected every 20 min by using enzyme-linked immunosorbent assay kits. Values are expressed... This study aimed to elucidate the effect of tryptophan (Trp) on gut hormone secretion as well as the roles of the calcium-sensing receptor (CaSR) and its downstream signaling pathway in gut hormone secretion by assessing swine duodenal perfusion in vitro. Swine duodenum was perfused with Krebs-Henseleit buffer as a basal solution. Various concentrations (0, 10, and 20 mM) of Trp were applied to investigate its effect on gut hormone secretion. A CaSR antagonist was used to detect the involvement... -
Canine model of ischemic stroke with permanent middle cerebral artery occlusion: clinical features, magnetic resonance imaging, histopathology, and immunohistochemistry
Joon-Hyeok Jeon, Hae-Won Jung, Hyo-Mi Jang, Jong-Hyun Moon, Ki-Tae Park, Hee-Chun Lee, Ha-Young Lim, Jung-Hyang Sur, By 대한수의학회 Journal of Veterinary Science 11 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 1호 10 75-85 (11 pages)
Intra-arterial rtPA treatment of stroke assessed by diffusion- and perfusion-weighted MRI. Stroke 1999, 30, 678-680. 19. Le Bihan D, Breton E, Lallemand D, Grenier P, Cabanis E, Laval-Jeantet M. MR imaging of intravoxel incoherent motions: application to diffusion and perfusion in neurologic disorders. Radiology 1986, 161, 401-407. 20. Mena H, Cadavid D, Rushing EJ. Human cerebral infarct: a... The purpose of this study was to identify time-related changes in clinical, MRI, histopathologic, and immunohistochemical findings associated with ischemic stroke in dogs. Additionally, the association of cerebrospinal fluid (CSF) and tissue levels of interleukin (IL)-6 with clinical prognosis was assessed. Ischemic stroke was induced by permanent middle cerebral artery occlusion (MCAO) in nine healthy experimental dogs. The dogs were divided into three groups... -
Pre- and post-operative cardiac evaluation of dogs undergoing lobectomy and pneumonectomy
Meri? Kocat?rk, Hakan Salci, Zeki Yilmaz*, A. Sami Bayram, Jørgen Koch 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2010, 제 11권 제 3호 12 257-264 (8 pages)
likely to be closely related to the abnormalities of hemodynamic and nervous regulation of the cardiac rhythm [14,27,28]. Arrhythmias are also reported to be associated with hypoxia, ventilation/perfusion mismatching, decreased pulmonary vascular reserve, decreased lung tidal volume, vagal irritation, adrenergic hyperactivity, myocarditis, pulmonary hypertension, and right heart dysfunction... This study aimed to assess the influence of lobectomy and pneumonectomy on cardiac rhythm and on the dimensions and function of the right-side of the heart. Twelve dogs undergoing lobectomy and eight dogs undergoing pneumonectomy were evaluated preoperatively and one month postoperatively with electrocardiography and Doppler echocardiography at rest. Pulmonary artery systolic pressure (PASP) was estimated by the tricuspid regurgitation jet (TRJ) via the pulse wave Doppler velocity method.... -
Ethanol extract of Angelica gigas inhibits croton oil-induced inflammation by suppressing the cyclooxygenase-prostaglandin pathway
Sunhee Shin, Seong Soo Joo, Dongsun Park, Jeong Hee Jeon, Tae Kyun Kim, Jeong Seon Kim, Sung Kyeong Park, Bang Yeon Hwang, *, Yun 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2010, 제 11권 제 1호 7 43-50 (8 pages)
mL/kg of Evan’s blue (1% in saline) immediately before croton oil application, and the ear tissues were punched out after transcardial perfusion with cold saline (100 mL/kg). Under anesthesia with diethyl ether, the left ventricle of mice was exposed, injected with a 23G needle connected to a bottle containing saline, and perfused in a flow rate of 1 mL/min [8]. Evan’s blue was extracted... The anti-inflammatory effects of an ethanol extract of Angelica gigas (EAG) were investigated in vitro and in vivo using croton oil-induced inflammation models. Croton oil (20 μg/mL) up-regulated mRNA expression of cyclooxygenase (COX)-I and COX-II in the macrophage cell line, RAW 264.7, resulting in the release of high concentrations of prostaglandin E2 (PGE2). EAG (1∼10 μg/mL) markedly suppressed croton oil-induced COX-II mRNA expression and PGE2 production. Application of croton oil (5% in... -
In vitro and in vivo gene therapy with CMV vector-mediated presumed dog β-nerve growth factor in pyridoxine-induced neuropathy dogs
Jin-Young Chung, Jung-Hoon Choi, Il-Seob Shin, Eun-Wha Choi, Cheol-Yong Hwang, Sang-Koo Lee, Hwa-Young Youn* 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 4호 5 367-374 (8 pages)
PBS to induce euthanasia. After perfusion, tissues (lumbar spinal cord (L 4), left and right dorsal root ganglia of L4 and sciatic nerve) were quickly removed and post-fixed for 4∼6 h in the same fixative at 4 o C and embedded in paraffin. The tissues were sectioned serially with a thickness of 5 μm using a microtome (Reichert-Jung, Germany) and floated onto gelatine-coated slides. Next,... Due to the therapeutic potential of gene therapy for neuronal injury, many studies of neurotrophic factors, vectors, and animal models have been performed. The presumed dog β-nerve growth factor (pdβ-NGF) was generated and cloned and its expression was confirmed in CHO cells. The recombinant pdβ-NGF protein reacted with a human β-NGF antibody and showed bioactivity in PC12 cells. The pdβb-NGF was shown to have similar bioactivity to the dog β-NGF. The recombinant pdβ-NGF plasmid was... -
Pyridoxine induced neuropathy by subcutaneous administration in dogs
Jin-Young Chung, Jung-Hoon Choi, Cheol-Yong Hwang, Hwa-Young Youn* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 2호 2 127-132 (6 pages)
M phosphate-buffered sal- ine (PBS), followed by 4% paraformaldehyde in 0.1 M PBS. After perfusion, the lumbar spinal cord (L 4), left and right dorsal root ganglia of L4, sciatic nerve, and tibial nerve were quickly removed, post-fixed for 4-6 h in the same fixative at 4 o C, and embedded in paraffin. The tissues were sectioned serially to 5 μm thickness with a micro- tome (Reichert-Jung,... To construct a sensory neuropathy model, excess pyridoxine (150 mg/kg s.i.d.) was injected subcutaneously in dogs over a period of 7 days. During the administrations period, the dogs experienced body weight reduction and proprioceptive loss involving the hindquarters. After pyridoxine administration was completed, electrophysiological recordings showed that the M wave remained at a normal state, but the H-reflex of the treated dogs disappeared at 7 days. The dorsal funiculus of L4 was disrupted... -
Canine model of ischemic stroke with permanent middle cerebral artery occlusion: clinical and histopathological findings
Byeong-Teck Kang, Jong-Hwan Lee, Dong-In Jung, Chul Park, Su-Hyun Gu, Hyo-Won Jeon, Dong-Pyo Jang, Chae-Young Lim, Fu-Shi Quan, 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 9 369-376 (8 pages)
difficult; thus, other techniques (e.g., diffusion-weighted imaging, perfusion- weighted imaging, magnetic resonance angiography, mag- netic resonance spectroscopy, and fluid-attenuated in- version recovery imaging) can be applied [6,7,10]. Because the features of these techniques are not well known in dogs, the canine model can be useful for imaging as well as therapeutic study in veterinary... The aim of the present study was to assess the clinical and histopathological findings in a canine model of ischemic stroke. Cerebral ischemic stroke was induced by middle cerebral artery occlusion in four healthy beagle dogs using silicone plugs. They showed neurological signs of forebrain dysfunction such as reduced responsiveness, head turning, circling, postural reaction deficits, perceptual deficits, and hemianopsia. These signs gradually regressed within 4 weeks without therapy. On...