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Akashi N, Murahata Y, Tsuno S, Kanazawa A, Hikasa Y, Imagawa T. Nicardipine constant rate infusion alleviates the cardiovascular effects of dexmedetomidine infusions without affecting the minimal alveolar concentration in sevoflurane-anesthetized dogs. Res Vet Sci 2024; 172:105254. [PMID: 38582048 DOI: 10.1016/j.rvsc.2024.105254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 03/27/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
Two randomized crossover trials evaluated the effects of nicardipine constant rate infusion (CRI) on 1) the anesthetic potency of sevoflurane and 2) the ability to attenuate dexmedetomidine-induced cardiovascular depression in anesthetized dogs. First, six healthy Beagle dogs weighing 11.7 ± 0.9 kg were allocated to one of three treatments that administered a CRI of carrier (saline) or dexmedetomidine 0.5 or 3.0 μg/kg/h following a loading dose. The minimum alveolar concentration (MAC) of sevoflurane was determined utilizing electric stimuli before and after the loading dose of nicardipine (20 μg/kg intravenously for 10 min), followed by CRI at 40 μg/kg/h with 60 min of equilibration. Subsequently, cardiovascular and blood gas variables were evaluated in another trial under sevoflurane anesthesia at the individual 1.5 MAC. After baseline measurements, the dogs were assigned to two treatments (dexmedetomidine CRI at 0.5 or 3.0 μg/kg/h following a loading dose) with sevoflurane doses adjusted to 1.5 times of MAC equivalent, and the measurements were repeated every 15 min for 120 min. After 60 min, nicardipine CRI at 40 μg/kg/h with a loading dose was added to the dexmedetomidine CRI. Dexmedetomidine infusions significantly decreased the sevoflurane MAC but nicardipine did not significantly alter the MAC either with or without dexmedetomidine CRI in dogs. Dexmedetomidine dose-dependently decreased the cardiac index and increased the systemic vascular resistance index; these effects were fully counteracted by concomitant nicardipine CRI. Nicardipine CRI can be useful for controlling the cardiovascular depression elicited by dexmedetomidine in anesthetized dogs without affecting the anesthetic potency of sevoflurane.
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Affiliation(s)
- Natsuki Akashi
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan.
| | - Sayaka Tsuno
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan
| | - Aomi Kanazawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan
| | - Yoshiaki Hikasa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan
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Osaki T, Hibino S, Murahata Y, Amaha T, Yokoe I, Yamashita M, Nomoto A, Yano S, Tanaka M, Kataoka H, Okamoto Y. Vascular-targeted photodynamic therapy with glucose-conjugated chlorin e6 for dogs with spontaneously occurring tumours. Vet Med Sci 2023; 9:2534-2541. [PMID: 37715623 PMCID: PMC10650375 DOI: 10.1002/vms3.1263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 08/04/2023] [Accepted: 09/05/2023] [Indexed: 09/17/2023] Open
Abstract
BACKGROUND Photodynamic therapy (PDT) using photosensitisers is a minimally invasive treatment for malignant tumours. However, ideal photosensitisers are not yet established. Recently, we developed a new photosensitiser, glucose-conjugated chlorin e6 (G-Ce6). OBJECTIVES To evaluate the clinical efficacy of vascular-targeted PDT (VTP), a type of PDT utilising a short drug-light interval, using G-Ce6 to treat spontaneously occurring tumours in dogs. METHODS Five dogs with spontaneously occurring tumours (malignant melanoma: three; haemangiopericytoma: two; and squamous cell carcinoma: one) were subjected to VTP. These dogs were intravenously injected with G-Ce6 at doses of 1-3 mg/kg 5 min before laser irradiation. Tumours were superficially or interstitially irradiated using a 677-nm diode laser. RESULTS Repeated VTP decreased tumour size, yielding complete remission in three dogs. Complications such as oedema surrounding normal tissues and fistulae were observed, and the oedema was self-limiting. The fistula was cured by debriding the necrotic tissues formed after VTP. CONCLUSIONS Our findings demonstrate that VTP using G-Ce6 had antitumour effects in dogs with spontaneously occurring tumours.
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Affiliation(s)
- Tomohiro Osaki
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
| | - Shota Hibino
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
| | - Yusuke Murahata
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
| | - Takao Amaha
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
| | - Inoru Yokoe
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
| | - Masamichi Yamashita
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
| | - Akihiro Nomoto
- Department of Applied Chemistry, Graduate School of EngineeringOsaka Metropolitan UniversityOsakaJapan
| | - Shigenobu Yano
- KYOUSEI Science Center for Life and NatureInstitute of Yamato Area and Kii PeninsulaNara Women's UniversityNaraJapan
| | - Mamoru Tanaka
- Department of Gastroenterology and MetabolismNagoya City University Graduate School of Medical SciencesNagoyaJapan
| | - Hiromi Kataoka
- Department of Gastroenterology and MetabolismNagoya City University Graduate School of Medical SciencesNagoyaJapan
| | - Yoshiharu Okamoto
- Faculty of AgricultureJoint Department of Veterinary Clinical Medicine, Tottori UniversityTottoriJapan
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Osaki T, Murahata Y, Iguchi A, Amaha T, Okamoto Y. Gastrotomy approach for removal of an oesophageal foreign body in a dog. Vet Med Sci 2023; 9:1074-1077. [PMID: 36867640 DOI: 10.1002/vms3.1098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 12/12/2022] [Accepted: 02/06/2023] [Indexed: 03/04/2023] Open
Abstract
A 9-year-old castrated male Kaninchen dachshund dog weighing 4.18 kg was referred to our institution and presented with occasional vomiting and dysphagia. The radiographic examination revealed a long radiopaque foreign body located throughout the thoracic oesophagus. Endoscopic removal was attempted using laparoscopic forceps but was unsuccessful as the foreign body was too large to be grasped. A gastrotomy was therefore performed, and long paean forceps were gently and blindly inserted into the cardia of the stomach. The bone foreign body was grasped with the long paean forceps under fluoroscopy and withdrawn from the oesophagus while checking with an endoscope. A gastrotomy approach using long forceps, endoscopy and fluoroscopy should be considered for removal of oesophageal foreign bodies from patients in which an endoscopic approach has been unsuccessful.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Aiko Iguchi
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Takao Amaha
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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Osaki T, Amaha T, Murahata Y, Sunden Y, Iguchi A, Harada K, Tsujino K, Murakami K, Ishii T, Takahashi K, Ishizuka M, Tanaka T, Okamoto Y. Utility of 5-aminolaevulinic acid fluorescence-guided endoscopic biopsy for malignant mesothelioma in a cat and dog. Aust Vet J 2023; 101:99-105. [PMID: 36482150 DOI: 10.1111/avj.13224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/02/2022] [Accepted: 11/24/2022] [Indexed: 12/13/2022]
Abstract
Malignant mesothelioma (MM) is uncommon in cats and dogs and can be challenging to diagnose. Adequate tissue sampling is required for superior diagnostic accuracy. Protoporphyrin IX, a metabolite of 5-aminolaevulinic acid (5-ALA), is a photosensitiser for photodynamic diagnosis (PDD). To the best of our knowledge, no study has reported the use of 5-ALA-PDD to detect MM in veterinary medicine. The present study describes the use of 5-ALA-PDD for MM diagnosis in a cat and dog, as well as the effectiveness of intracavitary chemotherapy. We evaluated the use of PDD with 5-ALA hydrochloride (5-ALA-PDD) in two cases of MM. A 12-year-old cat presented with a 1-month history of respiratory distress, and a 9-year-old dog presented with a 3-month history of mild abdominal distention. We endoscopically biopsied lesions in both the cases using 5-ALA-PDD. Histopathological examination revealed mesothelioma, and immunohistochemical staining was positive for calretinin. Both patients were treated with carboplatin. The cat died of respiratory failure. Although, the dog's condition improved 21 days after the first chemotherapeutic drug administration, the dog died on day 684 owing to cardiac-related issues. 5-ALA-PDD is thus, safe and feasible for the diagnosis of MM in veterinary medicine.
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Affiliation(s)
- T Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - T Amaha
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Y Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Y Sunden
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - A Iguchi
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - K Harada
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - K Tsujino
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - K Murakami
- SBI Pharmaceuticals Co., Ltd., Tokyo, Japan
| | - T Ishii
- SBI Pharmaceuticals Co., Ltd., Tokyo, Japan
| | | | - M Ishizuka
- SBI Pharmaceuticals Co., Ltd., Tokyo, Japan
| | - T Tanaka
- Neopharma Japan Co., Ltd., Tokyo, Japan
| | - Y Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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Ide W, Murahata Y, Amaha T, Ohara K, Osaki T. Penetrating needle injury in the orbit of a Shiba Inu. J Small Anim Pract 2022; 63:848. [PMID: 36039515 DOI: 10.1111/jsap.13547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/17/2022] [Accepted: 07/24/2022] [Indexed: 11/28/2022]
Affiliation(s)
- W Ide
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101Koyama-Minami, Tottori, Tottori, 680-8553, Japan
| | - Y Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101Koyama-Minami, Tottori, Tottori, 680-8553, Japan
| | - T Amaha
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101Koyama-Minami, Tottori, Tottori, 680-8553, Japan
| | - K Ohara
- Haluna Animal Hospital, 124-1Ota, Tsuyama, Okayama, 708-0806, Japan
| | - T Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101Koyama-Minami, Tottori, Tottori, 680-8553, Japan
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Tsuka T, Okamoto Y, Sunden Y, Morita T, Amaha T, Ito N, Murahata Y, Yamashita M, Osaki T, Imagawa T. Case Report: Ultrasonography and Magnetic Resonance Imaging of Anterior Segment Dysgenesis in a Calf. Front Vet Sci 2022; 9:794255. [PMID: 35464371 PMCID: PMC9024105 DOI: 10.3389/fvets.2022.794255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 03/04/2022] [Indexed: 11/13/2022] Open
Abstract
This study includes diagnostic efficacy of the antemortem, combined use of ultrasonography and magnetic resonance imaging (MRI) for the diagnosis of anterior segment dysgenesis. A 7-day-old male Holstein calf presented with progressive unilateral exophthalmos associated with enlargement of the right eyeball soon after birth. Ultrasonography of the enlarged right eyeball showed (1) a 2-cm-thick echogenic parenchymal lesion filling the anterior region of the right eyeball, (2) excess accumulation of the anechoic vitreous humor, and (3) absence of the lens structure. Antemortem examination using T2-weighted and fluid-attenuated inversion recovery MRI revealed a thickened, hyperintense anterior lesion and absence of the lens structure. These imaging findings were suggestive of anterior segment dysgenesis. Antemortem imaging showed no abnormalities other than the abnormal structure and size of the right eyeball; therefore, enucleation of the right eye was performed, which allowed intact healing without suppuration. Ocular ultrasonography enhanced the diagnostic accuracy due to the characteristic ultrasonographic findings of a thickened anterior lesion and absence of the lens structure in the eyeball, suggestive of anterior segment dysgenesis.
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Yamashita M, Murahata Y, Yokoe I, Okamoto Y, Imagawa T. Imaging findings and outcomes after traumatic cerebellar injury: a canine case report. BMC Vet Res 2022; 18:123. [PMID: 35361210 PMCID: PMC8969374 DOI: 10.1186/s12917-022-03220-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 03/21/2022] [Indexed: 11/25/2022] Open
Abstract
Background Traumatic brain injury (TBI) is a structural injury or physiological disruption of the brain induced by an external force. The cerebellum facilitates movement coordination and provides a sense of equilibrium; damage to this structure can cause a wide variety of symptoms, including ataxia or dystaxia, ocular motor dysfunction, and disequilibrium. TBIs localised to the cerebellum are rare in dogs, and the prognosis following this type of injury remains unclear. Case presentation A 10-year-old female Chihuahua/Dachshund-cross dog weighing 2.8 kg presented after a fall of approximately 1 m the preceding night. The dog exhibited paresis of all limbs and was recumbent with constant extensor rigidity with opisthotonos. The bilateral thoracic limb and right pelvic limb spinal reflexes were exaggerated, while the left pelvic limb spinal reflexes were normal. The menace response was decreased, and vertical nystagmus was observed. Magnetic resonance imaging (MRI) revealed a hyperintense lesion on T2weighted (W) images, fluid-attenuated inversion recovery, and diffusion-weighted imaging (DWI). Mannitol and prednisolone were administered, and the dog recovered. The bilateral pelvic limb postural reactions improved by Day 16. On Day 22, MRI revealed a decrease in the hyperintense area of the T2W images, and this lesion appeared isointense on DWI. Conclusions In this case report, a dog with localised injury to the cerebellum that comprised a post-tentorial lesion recovered with a favourable outcome. Moreover, similar to reports in humans, DWI can help diagnose and evaluate TBI in dogs.
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Affiliation(s)
- Masamichi Yamashita
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori, Tottori, 680-8553, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori, Tottori, 680-8553, Japan.
| | - Inoru Yokoe
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori, Tottori, 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori, Tottori, 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori, Tottori, 680-8553, Japan
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Tsuka T, Kozu T, Sunden Y, Morita T, Okamoto Y, Yamashita M, Osaki T, Amaha T, Ito N, Murahata Y, Imagawa T. Detection of squamous cell carcinoma of presumed pancreatic origin and its metastasis in a spotted seal (Phoca largha) using ultrasonography and computed tomography. J Vet Med Sci 2022; 84:373-377. [PMID: 35046212 PMCID: PMC8983291 DOI: 10.1292/jvms.21-0156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 21-year-old female spotted seal (Phoca largha), with a swollen abdomen, had a five-month history of anorexia and vomiting. Ultrasonography revealed an extended mass with
central necrotic foci in the right cranial abdomen. Computed tomography revealed an abdominal mass with a low-density central lumen and a pulmonary nodular lesion. Cytology of an abdominal
specimen collected through fine-needle aspiration indicated a malignant tumor with round, atypical cells with large nuclei. Three days after diagnosis, necropsy revealed a 10-cm large,
solid, whitish mass in the pancreatic parenchyma and multiple small nodules in the liver, spleen, mesentery, lungs, and mediastinal lymph nodes. Histopathological analysis showed prolific
neoplastic cells with marked atypia and occasional keratinization. Immunohistochemistry revealed that the neoplastic cells were positive for cytokeratin AE1/AE3 antibody. Thus, the seal was
diagnosed with squamous cell carcinoma, of presumed pancreatic origin, which had metastasized to multiple organs.
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Affiliation(s)
- Takeshi Tsuka
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | | | - Yuji Sunden
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Takehito Morita
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Masamichi Yamashita
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Tomohiro Osaki
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Takao Amaha
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Norihiko Ito
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
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Tsuka T, Ozaki H, Saito D, Murase T, Okamoto Y, Azuma K, Osaki T, Ito N, Murahata Y, Imagawa T. Genetic Characterization of CTX-M-2-Producing Klebsiella pneumoniae and Klebsiella oxytoca Associated With Bovine Mastitis in Japan. Front Vet Sci 2021; 8:659222. [PMID: 34026894 PMCID: PMC8137899 DOI: 10.3389/fvets.2021.659222] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/06/2021] [Indexed: 12/30/2022] Open
Abstract
CTX-M-2-producing Klebsiella oxytoca (K. oxytoca) has not received much attention in animal husbandry compared with Klebsiella pneumoniae (K. pneumoniae), a major reservoir of extended-spectrum β-lactamase (ESBL) genes. Bacteriological examinations of 1,466 mastitic milk samples between October 2012 and December 2014 were conducted. Ninety-five K. pneumoniae isolates (total prevalence: 6.5%) and 81 K. oxytoca isolates (total prevalence: 5.5%) were obtained. Seventeen K. pneumoniae isolates obtained from 15 animals reared on 11 farms and 9 K. oxytoca isolates obtained from 9 animals reared on the same farm were phenotypically confirmed to be ESBL producers. All nine ESBL-producing K. oxytoca isolates were obtained from one farm between June and November 2013 and related to a significantly (p < 0.05) higher monthly prevalence of mild mastitis (in June, August, September, October, and November 2013). Pulsed-field gel electrophoresis (PFGE) patterns of ESBL-producing K. pneumoniae isolates were distinguished from each other by more than 6-band differences except for two isolates from two animals, whereas all nine K. oxytoca isolates showed an identical PFGE pattern. Transferability of the bla CTX-M-2 gene was found in 14 K. pneumoniae and 9 K. oxytoca isolates by conjugation analysis. Of these isolates, the bla CTX-M-2 gene was detected on plasmids belonging to the incompatibility (Inc) groups P and N derived from five K. pneumoniae and nine K. oxytoca isolates, respectively, although the plasmids from the remaining nine K. pneumoniae were untypeable. All the transconjugants exhibited elevated minimum inhibitory concentrations of ampicillin, cefotaxime, and ceftiofur compared with those in the wild-type, recipient strain. Restriction fragment length polymorphism analysis demonstrated that the IncN plasmids extracted from eight of nine transconjugants, which received resistance against β-lactams from K. oxytoca, showed an identical DraI digestion pattern. These results suggest that the CTX-M-2-producing K. oxytoca strain with the above-mentioned characteristics may have clonally spread within a farm, whereas the bla CTX-M-2 gene in K. pneumoniae possibly disseminated among the farms through different plasmids. Thus, monitoring of ESBL genes, including the bla CTX-M-2 gene, among causative agents of bacterial mastitis in cows can help to develop relevant treatments and control practices.
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Affiliation(s)
- Takeshi Tsuka
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Hiroichi Ozaki
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Daisuke Saito
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Toshiyuki Murase
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Osaki
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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Akashi N, Murahata Y, Hosokawa M, Hikasa Y, Okamoto Y, Imagawa T. Cardiovascular and renal effects of constant rate infusions of remifentanil, dexmedetomidine and their combination in dogs anesthetized with sevoflurane. J Vet Med Sci 2020; 83:285-296. [PMID: 33310997 PMCID: PMC7972892 DOI: 10.1292/jvms.20-0457] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
We evaluated changes in cardiovascular and renal functions as well as arginine vasopressin (AVP) secretion, with remifentanil and dexmedetomidine administration alone or in combination in sevoflurane-anesthetized dogs. Six healthy adult Beagle dogs received one of the following four treatments in a randomized crossover study: saline (C), remifentanil alone at successively increasing doses (R; 0.15, 0.60, and 2.40 µg/kg/min), dexmedetomidine alone (D; 0.5 µg/kg intravenously for initial 10 min followed by a constant rate infusion at 0.5 µg/kg/hr), and a combination of remifentanil and dexmedetomidine at the above-mentioned doses (RD). Sevoflurane doses were adjusted to 1.5 times of minimum alveolar concentration (MAC) equivalent according to MAC-sparing effects with remifentanil and dexmedetomidine as previously reported. Cardiovascular measurements, renal function data, and plasma AVP concentrations were determined before and every 60 min until 180 min after drug administration as per each treatment. In the R, D and RD, heart rate significantly decreased and mean arterial pressure significantly increased from baseline or with C. Cardiac index significantly decreased and systemic vascular resistance index increased with D and RD. Oxygen extraction ratio, renal blood flow, and glomerular filtration rate were not affected. The plasma AVP concentrations significantly decreased in D and RD, but increased in R. Only in D, the natriuresis was elicited. The combination of remifentanil and dexmedetomidine in sevoflurane-anesthetized dogs was acceptable in terms of the hemodynamics, oxygenation, and renal function. Remifentanil may interfere with dexmedetomidine-induced diuresis and inhibition of AVP secretion.
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Affiliation(s)
- Natsuki Akashi
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Masahumi Hosokawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Yoshiaki Hikasa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
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Tsuka T, Saito A, Okamoto Y, Sunden Y, Morita T, Nishimura R, Murahata Y, Azuma K, Yamashita M, Osaki T, Ito N, Imagawa T. Triple nostrils in a calf. Ir Vet J 2020; 73:19. [PMID: 32864097 PMCID: PMC7453521 DOI: 10.1186/s13620-020-00173-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 08/23/2020] [Indexed: 11/25/2022] Open
Abstract
Background Nasal abnormalities are rare in bovines. In humans, nasal deformities are mainly classified as proboscis lateralis or supernumerary nostrils. This report discusses the etiology of triple nostrils in a calf, based on computed tomography, magnetic resonance imaging, and endoscopy. Case presentation A female Holstein calf presented with triple nostrils. The following abnormalities were observed: (1) formation of a small and flat blind-ended middle nostril between the right and left nostrils; (2) presence of a hair-bearing surface on the muzzle; (3) abnormal curvature of the nasal septum, resulting in a narrower right nasal cavity due to transformation of the nasal bones; and (4) formation of a bone-like structure within the nasal septum. These findings were similar to those of supernumerary nostrils in humans. Conclusions To the best of our knowledge, this represents the first description of a calf with triple nostrils. The use of imaging modalities is necessary for investigating the etiology of triple nostrils.
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Affiliation(s)
- Takeshi Tsuka
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Ai Saito
- Okayama Prefectural Federation Agricultural Mutual Aid Association, 1-30, Kuwata, Okayama-city, Okayama, Japan
| | - Yoshiharu Okamoto
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Yuji Sunden
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Takehito Morita
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Ryo Nishimura
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Yusuke Murahata
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Kazuo Azuma
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Masamichi Yamashita
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Tomohiro Osaki
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Norihiko Ito
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Tomohiro Imagawa
- Clinical Veterinary Sciences, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
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12
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Tsuka T, Okamoto Y, Sunden Y, Morita T, Yamashita M, Osaki T, Azuma K, Amaha T, Ito N, Murahata Y, Imagawa T. Ultrasonography of sudden swollen tongue in a calf. BMC Vet Res 2020; 16:200. [PMID: 32546145 PMCID: PMC7298850 DOI: 10.1186/s12917-020-02398-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/01/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In cattle, the lingual diseases are primarily diagnosed postmortem by histopathological examination of the affected tongues obtained after the death or during necropsy. In humans, ultrasonography has been used to provide differential diagnoses, and for preoperative or intraoperative planning of glossectomy in various lingual diseases. This is a bovine clinical case report, in which ultrasonography for sudden swelling of the tongue, which was possibly caused by snake bite, was utilized as a preoperative indication to perform a glossectomy. CASE PRESENTATION An eight-month-old female Japanese black calf presented with sudden swelling of the tongue with well-defined discoloration in the cranial region. A 10-MHz linear probe on a portable-type ultrasound machine (MyLabOne VET, Esaote Co., Genova, Italy) was applied to the ventral surface of the tongues in the affected case, and also in five healthy calves under sedation to observe normal tongues. Ultrasonography of the swollen tongue in this case revealed that the ventral lingual muscular layers were severely thickened compared with those of normal tongues. However, the muscle layers were regularly aligned with the echogenic muscular fibers. This resembled the lingual muscular architectures of normal tongues. Color-flow Doppler ultrasonography revealed that blood flow was weakened in the small peripheral vessels in the spaces between the lingual muscular structures, and was lacking in the deep lingual artery between the apex and base of the tongue. This finding was very different than that of normal tongues, which exhibited weakened or rich blood flows. Based on ultrasonographic findings, this case was treated with glossectomy. After recovery, the calf grew up normally with a normal appetite and rumination, and did not exhibit mouth pain behavior. Histopathologically, hemorrhagic necrotic changes, together with focal formation of fibrin thrombus in the lingual blood vessels in the affected tongue, were noted. CONCLUSIONS To the best of our knowledge, the present report is the first description of lingual ultrasonography performed in cattle. In this case, ultrasonography enabled visualization of decreased vascularity, which might be associated with hemorrhage or formation of fibrin thrombus in the suddenly swollen tongue presented.
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Affiliation(s)
- Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan.
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Yuji Sunden
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Takehito Morita
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Masamichi Yamashita
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Takao Amaha
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Japan
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13
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Akashi N, Murahata Y, Kishida H, Hikasa Y, Azuma K, Imagawa T. Effects of constant rate infusions of dexmedetomidine, remifentanil and their combination on minimum alveolar concentration of sevoflurane in dogs. Vet Anaesth Analg 2020; 47:490-498. [PMID: 32471632 DOI: 10.1016/j.vaa.2020.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 04/02/2020] [Accepted: 04/03/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To evaluate the effects of constant rate infusions (CRIs) of dexmedetomidine and remifentanil alone and their combination on minimum alveolar concentration (MAC) of sevoflurane in dogs. STUDY DESIGN Randomized crossover experimental study. ANIMALS A total of six (three males, three females) healthy, adult neutered Beagle dogs weighing 12.6 ± 1.4 kg. METHODS Anesthesia was induced with sevoflurane in oxygen until endotracheal intubation was possible and anesthesia maintained with sevoflurane using positive-pressure ventilation. Each dog was anesthetized five times and was administered each of the following treatments: saline (1 mL kg-1 hour-1) or dexmedetomidine at 0.1, 0.5, 1.0 or 5.0 μg kg-1 loading dose intravenously over 10 minutes followed by CRI at 0.1, 0.5, 1.0 or 5.0 μg kg-1 hour-1, respectively. Following 60 minutes of CRI, sevoflurane MAC was determined in duplicate using an electrical stimulus (50 V, 50 Hz, 10 ms). Then, CRI of successively increasing doses of remifentanil (0.15, 0.60 and 2.40 μg kg-1 minute-1) was added to each treatment. MAC was also determined after 30 minutes equilibration at each remifentanil dose. Isobolographic analysis determined interaction from the predicted doses required for a 50% MAC reduction (ED50) with remifentanil, dexmedetomidine and remifentanil combined with dexmedetomidine, with the exception of dexmedetomidine 5.0 μg kg-1 hour-1, obtained using log-linear regression analysis. RESULTS The sevoflurane MAC decreased dose-dependently with increasing infusion rates of dexmedetomidine and remifentanil. Remifentanil ED50 values were lower when combined with dexmedetomidine than those obtained during saline-remifentanil. Synergistic interactions between dexmedetomidine and remifentanil for MAC reduction occurred with dexmedetomidine at 0.5 and 1.0 μg kg-1 hour-1. CONCLUSIONS AND CLINICAL RELEVANCE Combined CRIs of dexmedetomidine and remifentanil synergistically resulted in sevoflurane MAC reduction. The combination of dexmedetomidine and remifentanil effectively reduced the requirement of sevoflurane during anesthesia in dogs.
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Affiliation(s)
- Natsuki Akashi
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan.
| | - Hikaru Kishida
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshiaki Hikasa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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14
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Osaki T, Gonda K, Murahata Y, Sunden Y, Amaha T, Kunisue N, Takahashi K, Ishizuka M, Tanaka T, Li L, Yokoe I, Yamashita M, Azuma K, Tsuka T, Ito N, Imagawa T, Okamoto Y. Photodynamic detection of a feline meningioma using 5-aminolaevulinic acid hydrochloride. JFMS Open Rep 2020; 6:2055116920907429. [PMID: 32206327 PMCID: PMC7074522 DOI: 10.1177/2055116920907429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Case summary The present study describes the case of a feline meningioma that was detected using 5-aminolaevulinic acid hydrochloride (5-ALA)-induced protoporphyrin IX (PpIX) fluorescence at surgery. An extra-axial mass in the temporoparietal region was observed by MRI. Following craniectomy and durotomy, photodynamic detection (PDD) was performed for detection of the tumour. Intratumour PpIX was detected using fluorescence spectrum evaluation and high-performance liquid chromatography. PDD revealed bright fluorescence of PpIX induced by 5-ALA, facilitating fluorescence-guided resection of the tumour tissue. Postoperative examination demonstrated an intratumour PpIX protein concentration of 16.8 nmol/g, and based on histopathological findings we diagnosed the mass as meningioma. Relevance and novel information PDD using 5-ALA has been used to identify the surgical margins during resection of primary human brain tumours. Recently, we have reported post-mortem PDD using 5-ALA for a canine glioblastoma. To our knowledge, this technique has not been previously used for the detection and resection of feline brain tumours. Our findings suggest that PDD using 5-ALA is useful for intraoperative fluorescence-guided resection of malignant meningioma in cats.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Kengo Gonda
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yuji Sunden
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Takao Amaha
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | | | | | | | | | - Liming Li
- Department of Bio- and Material Photonics, Chitose Institute of Science and Technology, Chitose, Hokkaido, Japan
| | - Inoru Yokoe
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Masamichi Yamashita
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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15
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Tsuka T, Nishimura R, Hishinuma M, Murahata Y, Yamashita M, Azuma K, Osaki T, Ito N, Okamoto Y, Imagawa T. Reliability of ultrasonographic measurements of bovine sole structures in relation to sole horn thickness, measured by computed tomography, and sole horn hardness. J Dairy Sci 2019; 102:10105-10118. [PMID: 31521343 DOI: 10.3168/jds.2018-15175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 06/03/2019] [Indexed: 11/19/2022]
Abstract
The goal of the present study was to determine the effect of sole horn thickness (SHT) and sole horn hardness (SHD) on ultrasonographic visualization of sole structures in the inner and outer claws of 150 Holstein-Friesian cows, and to evaluate different ultrasound frequencies for this purpose. Ultrasonographic views of the sole structure were considered complete when 3 echogenic lines, representing the ventral surface of the sole horn, the borders of the sole horn and soft-tissue layer, and the ventral surface of the distal phalanx, were seen. The proportion of complete ultrasonographic views of the sole structures, designated as the ultrasonographic visualization proportion (UVP), and the measurement errors of SHT were evaluated by comparing images from computed tomography (CT) and ultrasonography. The latter images were generated using 3 different probes, frequencies of 6.5 and 5.0 MHz, and 2 different ultrasound machines (#1 and #2) to assess the apex, middle, and heel regions of the claws. The UVP were 60.8 to 77.9% for the 6.5-MHz probe in ultrasound machine #1 (probe A), which were lower than those (>90%) for both the 5.0-MHz probe in ultrasound machine #1 (probe B) and the 5.0-MHz probe in ultrasound machine #2 (probe C). The UVP was significantly lower in claws with an SHD ≥50 units than in claws with an SHD <40 or 40 to <50 units (UVP: 77.1% compared with 93.7 and 91.4%, respectively) when measured with probe B. In claws with an SHT <10 mm, the UVP was significantly lower when SHD was ≥50 units compared with <40 or 40 to >50 units; the values were 69.0% versus 91.3 and 85.9%, respectively, for probe A, and 89.7% versus 100 and 100%, respectively, for probe B. When SHT were measured by either probes A or B in ultrasound machine #1, the proportions of claws in which ultrasonographic values were within a ±1 mm range compared with the values obtained by CT were 84.9 to 91.3% for CT-determined SHT <5 mm, 66.7 to 71.9% for CT-determined SHT 5 to <7 mm, 28.9 to 51.2% for CT-determined SHT 7 to <10 mm, and 6.2 to 19.7% for CT-determined SHT ≥10 mm. The data indicated that increased SHT was associated with a decrease in ultrasonographic measurement accuracy. In claws with an SHT <5 mm, the high proportion of ultrasonographic values that were accurate within a ±1 mm range suggests that this imaging modality would be useful in cows with thin soles.
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Affiliation(s)
- T Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550.
| | - R Nishimura
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - M Hishinuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - Y Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - M Yamashita
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - K Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - T Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - N Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - Y Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
| | - T Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Japan, 680-8550
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16
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Tsuka T, Okamoto Y, Yamamoto N, Hayashi K, Morita T, Sunden Y, Murahata Y, Azuma K, Osaki T, Ito N, Imagawa T. Unilateral rostral mandibulectomy for gingival vascular hamartoma in two calves. J Vet Sci 2018; 19:582-584. [PMID: 29510473 PMCID: PMC6070597 DOI: 10.4142/jvs.2018.19.4.582] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 02/27/2018] [Accepted: 03/03/2018] [Indexed: 11/20/2022] Open
Abstract
A 2-month-old female Holstein calf and a 5-month-old female Japanese black calf presented with gingival vascular hamartoma located in the interdental space between the second and third mandibular incisors in the right and left mandibles, respectively. On radiographic or computed tomographic images, osteolytic changes appeared within the mandibular bones adjacent to the masses. The masses were removed along with affected mandibular bone by using unilateral rostral mandibulectomy. After surgery, both cases exhibited a normal appetite and grew normally, with no cosmetic changes or recurrences. Unilateral rostral mandibulectomy can be applied for invasive gingival vascular hamartomas associated with osteolytic changes.
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Affiliation(s)
- Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Naoki Yamamoto
- Shimane Prefectural Federation Agricultural Mutual Aid Association, Shimane 690-0887, Japan
| | - Keiji Hayashi
- Tottori Prefectural Federation Agricultural Mutual Aid Association, Tottori 689-2202, Japan
| | - Takehito Morita
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Yuji Sunden
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori 680-8553, Japan
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Osaki T, Murahata Y, Yamashita M, Isao S, Okamoto Y. Palliative limb‐sparing photodynamic therapy with chemotherapy in a dog with osteosarcoma of the proximal tibia. Vet rec case rep 2018. [DOI: 10.1136/vetreccr-2018-000688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary MedicineTottori UniversityTottoriJapan
| | - Yusuke Murahata
- Joint Department of Veterinary MedicineTottori UniversityTottoriJapan
| | | | | | - Yoshiharu Okamoto
- Joint Department of Veterinary MedicineTottori UniversityTottoriJapan
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18
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Osaki T, Sakata I, Uto Y, Yamashita M, Murahata Y, Azuma K, Tsuka T, Ito N, Imagawa T, Okamoto Y. Effects of TONS504-photodynamic therapy on mouse mammary tumor cells. Oncol Lett 2018; 16:2078-2084. [PMID: 30008903 PMCID: PMC6036337 DOI: 10.3892/ol.2018.8887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 04/30/2018] [Indexed: 11/06/2022] Open
Abstract
In the present study, TONS504 (C51H58N8O5I2; molecular weight, 1,116.9), a novel cationic hydrophilic photosensitizer, was synthesized from protoporphyrin IX dimethyl ester through a five-step process according to a patented method for use in photodynamic therapy (PDT). The subcellular localization of TONS504 and the cytotoxic effects of TONS504-mediated PDT in the mouse mammary tumor EMT6 cell line were investigated. TONS504 was localized primarily in the lysosomes and partially in the mitochondria. The cytotoxic effects of TONS504-mediated PDT in the mouse mammary tumor EMT6 cell line were investigated using a WST8 assay and an Oxidative Stress kit. The cell viability values following treatment with 10 µg/ml TONS504 at light energies of 0, 1, 5 and 10 J/cm2 were 92.5, 101.8, 27.7 and 1.8%, respectively. The percentages of reactive oxygen species (ROS)(+) cells following the same treatment were 8.6, 8.5, 29.2 and 70.1%, respectively, whereas the percentages of apoptotic cells were 7.1, 5.6, 24.8 and 48.7%, respectively. The percentages of ROS(+) and apoptotic cells in the group subjected to TONS504-mediated PDT increased in a manner dependent on the TONS504 concentration and light energy. Further studies are required to evaluate the in vivo pharmacokinetics, tissue distribution and photodynamic effects of TONS504.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Isao Sakata
- Porphyrin Laboratory, Okayama 700-0086, Japan
| | - Yoshihiro Uto
- Department of Bioengineering, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima 770-8506, Japan
| | - Masamichi Yamashita
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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19
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Kuroda K, Yamashita M, Murahata Y, Azuma K, Osaki T, Tsuka T, Ito N, Imagawa T, Okamoto Y. Use of ozonated water as a new therapeutic approach to solve current concerns around antitumor treatment. Exp Ther Med 2018; 16:1597-1602. [PMID: 30186377 PMCID: PMC6122405 DOI: 10.3892/etm.2018.6415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 01/09/2018] [Indexed: 01/15/2023] Open
Abstract
Tumor hypoxia is a severe problem affecting tumor therapy because it reduces the sensitivity of chemotherapy and radiation therapy. Ozone has been known to improve peripheral blood perfusion and oxygen partial pressure. The effect of ozonated water on tumor hypoxia, alone and in combination with an antitumor drug was studied in the present study. Following intraperitoneal administration of ozonated water to colon-26-bearing mice, the Hoechst 33342-positive area and the intratumoral oxygen partial pressure was significantly increased. The tumor growth rate was more suppressed when ozonated water was combined with cisplatin (CDDP) compared with CDDP treatment alone. The number of Ki-67-positive cells significantly decreased, whereas the number of TUNEL-positive cells significantly increased. The present study showed that ozonated water increased intratumoral blood perfusion and improved tumor hypoxia. In addition, ozonated water increased the therapeutic effect of CDDP. These findings, as well as previous reports, suggest that tumor growth is suppressed after treatment with ozonated water as the amount of CDDP reaching the tumor is increased when the intratumoral blood perfusion is increased due to the ozonated water. Thus, the administration of ozonated water may be a new therapeutic approach to solve current concerns regarding antitumor treatment.
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Affiliation(s)
- Kohei Kuroda
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Masamiti Yamashita
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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Murahata Y, Hikasa Y, Hayashi S, Shigematsu K, Akashi N, Osaki T, Tsuka T, Okamoto Y, Imagawa T. The effect of remifentanil on the minimum alveolar concentration (MAC) and MAC derivatives of sevoflurane in dogs. J Vet Med Sci 2018; 80:1086-1093. [PMID: 29780077 PMCID: PMC6068302 DOI: 10.1292/jvms.18-0122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Remifentanil is an ultra-short-acting µ-opioid receptor agonist. The purpose of this study was to determine the relationship of the minimum alveolar concentration (MAC) of
sevoflurane and other MAC derivatives, including the MAC for blocking adrenergic responses (MAC-BAR) and the MAC at which tracheal extubation is occurred (MAC-extubation), with or without
remifentanil infusion. Six healthy adult beagle dogs were randomly anesthetized three times for determining the MAC-BAR (SEVMAC-BAR), MAC (SEVMAC), and MAC- extubation
(SEVMAC-extubation) of sevoflurane under infusion of saline and remifentanil at rates of 0.15, 0.30, 0.60, 1.20, and 2.40 µg/kg/min. The ratio of the
SEVMAC-BAR and SEVMAC and that of the SEVMAC-extubation and SEVMAC were not significantly different at baseline and during treatment. The
MAC-BAR95 and MAC95 decreased in a dose-dependent manner until reaching 1.20 µg/kg/min, and the MAC-extubation5 decreased in a
dose-dependent manner until reaching 0.60 µg/kg/min. The percentage reduction of SEVMAC-BAR, SEVMAC, and SEVMAC-extubation increased in a
dose-dependent manner during remifentanil infusion. The heart rate significantly decreased in the MAC-BAR and MAC groups, and the systolic and mean arterial pressures increased after
remifentanil infusion compared with the baseline values. Remifentanil infusion caused reduction of the SEVMAC-BAR, SEVMAC, and SEVMAC-extubation in a
dose-dependent manner, and ceiling effects were observed in the dogs. Higher doses of remifentanil and sevoflurane were necessary for blocking the sympathetic response to the supramaximal
stimulus to prevent movement and extubation in dogs.
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Affiliation(s)
- Yusuke Murahata
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Yoshiaki Hikasa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Sho Hayashi
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Koki Shigematsu
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Natsuki Akashi
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
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Osaki T, Yokoe I, Uto Y, Ishizuka M, Tanaka T, Yamanaka N, Kurahashi T, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Corrigendum to "Bleomycin enhances the efficacy of sonodynamic therapy using aluminum phthalocyanine disulfonate" [Ultrason. Sonochem. 28 (2016) 161-168]. Ultrason Sonochem 2017; 38:751. [PMID: 27291696 DOI: 10.1016/j.ultsonch.2016.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan.
| | - Inoru Yokoe
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yoshihiro Uto
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima, Japan
| | | | | | | | | | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
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Kuroda K, Osaki T, Harada K, Yamashita M, Murahata Y, Azuma K, Tsuka T, Ito N, Imagawa T, Okamoto Y. Uterine torsion in a full-term pregnant cat. JFMS Open Rep 2017; 3:2055116917726228. [PMID: 28839948 PMCID: PMC5564926 DOI: 10.1177/2055116917726228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Case summary A 5-year-old intact female Maine Coon cat presented with a 2 day history of lethargy, anorexia and anaemia. The cat had bred 60 days previously and jumped from a height 3 days earlier, which was followed by a worsening of its condition. Ultrasonography revealed that two fetuses had died and one remained alive. Urgent surgical intervention was deemed necessary, and the cat underwent a blood transfusion and laparotomy. The right uterine horn was dark red in appearance and had rotated 360° in the clockwise direction at its base. Subsequently, an ovariohysterectomy and caesarean section were performed, and the fetus in the left uterine horn initially survived. Although the cat appeared to recover from anaemia and physical injury, the kitten died on postoperative day 1. Relevance and novel information In cases involving only one twisted uterine horn, the fetuses located in the contralateral horn could potentially survive; however, many such fetuses do not survive, and only a few reports have described fetal survival in a pregnant cat with uterine torsion. In the present case, early surgical intervention and blood transfusion allowed us to save the cat. Our findings demonstrate the life-saving abilities of initial support treatment and early surgical intervention for both the pregnant cat and fetuses in cases of acute abdomen caused by uterine torsion.
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Affiliation(s)
- Kohei Kuroda
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Kazuki Harada
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Masamichi Yamashita
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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Osaki T, Kawase Y, Iseki H, Kishimoto S, Ikuta S, Muragaki Y, Yamashita M, Azuma K, Murahata Y, Tsuka T, Itoh N, Imagawa T, Okamoto Y. Effects of photodynamic therapy with talaporfin sodium on squamous cell carcinoma and sarcoma cells. Photodiagnosis Photodyn Ther 2017; 18:213-220. [DOI: 10.1016/j.pdpdt.2017.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 02/05/2017] [Accepted: 02/10/2017] [Indexed: 12/27/2022]
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Osaki T, Yokoe I, Takahashi K, Inoue K, Ishizuka M, Tanaka T, Azuma K, Murahata Y, Tsuka T, Itoh N, Imagawa T, Okamoto Y. Metformin enhances the cytotoxicity of 5-aminolevulinic acid-mediated photodynamic therapy in vitro. Oncol Lett 2017; 14:1049-1053. [PMID: 28693272 DOI: 10.3892/ol.2017.6237] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 01/13/2017] [Indexed: 12/12/2022] Open
Abstract
The biguanide metformin is a drug widely used for the treatment of type 2 diabetes. Metformin enhances the cytotoxicity of chemotherapy by promoting the adenosine monophosphate-activated protein kinase (AMPK) autophagy signaling pathway. Photodynamic therapy (PDT) with 5-aminolevulinic acid (5-ALA), a precursor of protoporphyrin IX (PpIX), leads to apoptosis when PpIX accumulates in the mitochondria, and also leads to autophagy through activation of AMPK. In the present study, the effect of metformin in combination with 5-ALA-PDT was evaluated in vitro in KLN205 lung cancer cells. At a fluence of 5 J/cm2, 5-ALA-PDT in combination with 5 mM metformin exhibited significantly increased cytotoxicity compared with that observed with 0 and 0.1 mM metformin (P=0.0197 and P=0.0423, respectively). The cells treated with 5-ALA-PDT and metformin exhibited condensation of nuclear chromatin and the presence of autophagosomes. These results indicate that apoptosis and autophagy occur in KLN205 cells following combined treatment with 5-ALA-PDT and metformin. The results from the present study are the first to indicate, to the best of our knowledge, that metformin potentiates the efficacy of 5-ALA-PDT.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Inoru Yokoe
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | | | | | | | - Tohru Tanaka
- SBI Pharmaceuticals Co., Ltd., Tokyo 106-6020, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Itoh
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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Osaki T, Sunden Y, Sugiyama A, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Establishment of a canine mammary gland tumor cell line and characterization of its miRNA expression. J Vet Sci 2017; 17:385-90. [PMID: 26726024 PMCID: PMC5037307 DOI: 10.4142/jvs.2016.17.3.385] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/19/2015] [Accepted: 11/09/2015] [Indexed: 12/26/2022] Open
Abstract
Canine mammary gland tumors (CMGTs), which are the most common neoplasms in sexually intact female dogs, have been suggested as a model for studying human breast cancer because of several similarities, including relative age of onset, risk factors, incidence, histological and molecular features, biological behavior, metastatic pattern, and responses to therapy. In the present study, we established a new cell line, the SNP cell line, from a CMGT. A tumor formed in each NOD.CB17-Prkdcscid/J mouse at the site of subcutaneous SNP cell injection. SNP cells are characterized by proliferation in a tubulopapillary pattern and are vimentin positive. Moreover, we examined miRNA expression in the cultured cells and found that the expression values of miRNA-143 and miRNA-138a showed the greatest increase and decrease, respectively, of all miRNAs observed, indicating that these miRNAs might play a significant role in the malignancy of SNP cells. Overall, the results of this study indicate that SNP cells might serve as a model for future genetic analysis and clinical treatments of human breast tumors.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yuji Sunden
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Akihiko Sugiyama
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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Osaki T, Sakata I, Uto Y, Azuma K, Murahata Y, Tsuka T, Itoh N, Imagawa T, Okamoto Y. Photodynamic Therapy Mediated by a Novel Chlorin Derivative, TONS 501-Na, in EMT6 cells. Anticancer Res 2017; 37:1723-1728. [PMID: 28373434 DOI: 10.21873/anticanres.11504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 03/13/2017] [Accepted: 03/14/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND The lipophilic photosensitizer, TONS 501, is a novel porphyrin-derived methyl ester that was developed for photodynamic antimicrobial chemotherapy. This study developed a hydrophilic and anionic porphyrin salt of this compound (TONS 501-Na) for use in photodynamic therapy (PDT). This chlorin derivative is synthesized from the protoporphyrin IX dimethyl ester. MATERIALS AND METHODS We investigated the in vitro cytotoxic effects of TONS 501-Na-mediated PDT on EMT6 mouse breast cancer cells. EMT6 cells were incubated with 0-100 μg/ml TONS 501-Na for 24 h prior to replacing the culture medium and exposing the cells to 6 mW/cm2 diode laser irradiation at 0-13 J/cm2 to induce PDT. Morphological changes and cell viability were evaluated 24 h after PDT. The percentages of apoptotic cells were evaluated 4 h and 24 h after PDT. RESULTS The concentrations of TONS 501-Na that killed 50% of EMT6 cells after exposure to light doses of 0, 0.4, 3, 6, or 13 J/cm2 were 84.6, 33.2, 18, 8.2, and 2.2 μg/ml, respectively. Tumor cells exposed to PDT showed chromatin condensation and fragmentation. The percentages of apoptotic cells increased in a TONS 501-Na concentration-dependent manner in the PDT group, and were significantly higher than those in the control group or in cells treated with TONS 501-Na or laser irradiation alone. CONCLUSION TONS 501-Na-mediated PDT induced mouse breast cancer cell death in a concentration-dependent manner. Future studies should evaluate the in vivo pharmacokinetics, tissue distribution, and photodynamic effects of TONS 501-Na.
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Affiliation(s)
- Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | | | - Yoshihiro Uto
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Norihiko Itoh
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
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Osaki T, Uto Y, Ishizuka M, Tanaka T, Yamanaka N, Kurahashi T, Azuma K, Murahata Y, Tsuka T, Itoh N, Imagawa T, Okamoto Y. Artesunate Enhances the Cytotoxicity of 5-Aminolevulinic Acid-Based Sonodynamic Therapy against Mouse Mammary Tumor Cells In Vitro. Molecules 2017; 22:molecules22040533. [PMID: 28346389 PMCID: PMC6154000 DOI: 10.3390/molecules22040533] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/18/2017] [Accepted: 03/25/2017] [Indexed: 01/01/2023] Open
Abstract
Sonodynamic therapy (SDT) kills tumor cells through the synergistic effects of ultrasound (US) and a sonosensitizer agent. 5-Aminolevulinic acid (5-ALA) has been used as a sonodynamic sensitizer for cancer treatment. However, studies have shown that 5-ALA-based SDT has limited efficacy against malignant tumors. In this study, we examined whether artesunate (ART) could enhance the cytotoxicity of 5-ALA-based SDT against mouse mammary tumor (EMT-6) cells in vitro. In the ART, ART + US, ART + 5-ALA, and ART + 5-ALA + US groups, the cell survival rate correlated with ART concentration, and decreased with increasing concentrations of ART. Morphologically, many apoptotic and necrotic cells were observed in the ART + 5-ALA + US group. The percentage of reactive oxygen species-positive cells in the ART + 5-ALA + US group was also significantly higher than that in the 5-ALA group (p = 0.0228), and the cell death induced by ART + 5-ALA + US could be inhibited by the antioxidant N-acetylcysteine. These results show that ART offers great potential in enhancing the efficacy of 5-ALA-based SDT for the treatment of cancer. However, these results are only based on in vitro studies, and further in vivo studies are required.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Yoshihiro Uto
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima 770-8506, Japan.
| | | | - Tohru Tanaka
- SBI Pharmaceuticals Co., Ltd., Tokyo 106-6020, Japan.
| | | | | | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Norihiko Itoh
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
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Abstract
A 10-month-old female Japanese black heifer presenting with sudden loss of appetite was diagnosed with extreme extension of the gallbladder. Laparotomy
reaching from the right part of the 10th rib to the right flank showed an extended gallbladder greater than 50 cm in diameter. Cholecystectomy was performed as
follows: 1) complete removal of the gallbladder distally from the base; 2) flushing via a catheter inserted into the common bile duct; and 3) covering of the
hole opened in the common bile duct with a double-suturing method using the mucous membrane and muscular layers of the remaining gallbladder structures. Serum
levels of total bilirubin gradually decreased from 7.5 mg/dl preoperatively to 4.7 mg/dl, 1.6 mg/dl and 0.6
mg/dl at 3, 8 and 34 days postoperatively, respectively. The heifer showed 1 month of clinical improvements, grew normally and finally became
pregnant. To the best of our knowledge, this represents the first clinical report to describe cholecystectomy in cattle.
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Affiliation(s)
- Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-Minami, Tottori 680-8550, Japan
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Osaki T, Sakata I, Uto Y, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Effect of TONS 501 sodium-mediated photodynamic therapy on EMT6 cells. Photodiagnosis Photodyn Ther 2017. [DOI: 10.1016/j.pdpdt.2017.01.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Utsugi S, Azuma K, Osaki T, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Analysis of plasma free amino acid profiles in canine brain tumors. Biomed Rep 2016; 6:195-200. [PMID: 28357072 DOI: 10.3892/br.2016.825] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/05/2016] [Indexed: 11/05/2022] Open
Abstract
Canine brain tumors are best diagnosed using magnetic resonance imaging (MRI). However, opportunities of MRI examination are restricted due to its limited availability in veterinary facilities; thus, numerous canine brain tumors are diagnosed at an advanced stage. Therefore, development of a noninvasive diagnostic biomarker is required for the early detection of brain tumors. In the present study, plasma free amino acid (PFAA) profiles between dogs with and without brain tumors were compared. A total of 12 dogs with brain tumors, diagnosed based on clinical signs, and on the results of intracranial MRI and/or pathological examination were evaluated. In addition, eight dogs diagnosed with idiopathic epilepsy and 16 healthy dogs were also included. A liquid chromatography system with automated pre-column derivatization functionality was used to measure the levels of 20 amino acids. As a result, the levels of three amino acids (alanine, proline and isoleucine) were increased significantly (1.6-, 1.5- and 1.6-fold, respectively) in the plasma of dogs with brain tumors as compared with the levels in control dogs (all P<0.05). Thus, the PFAA levels of dogs with brain tumors differed from those of healthy dogs. The present study demonstrated that analysis of PFAA levels of dogs with brain tumors may serve as a useful biomarker for the early detection of canine brain tumors.
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Affiliation(s)
- Shinichi Utsugi
- Department of Clinical Veterinary Medicine, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan; Department of Neurology, Japan Animal Referral Medical Center, Kawasaki, Kanagawa 213-0032, Japan
| | - Kazuo Azuma
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Ito
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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Kuroda K, Osaki T, Yamashita M, Murahata Y, Azuma K, Tsuka T, Ito N, Imagawa T, Okamoto Y. Migration of a shotgun pellet into the L7-S1 intervertebral foramen of a hunting dog. J Small Anim Pract 2016; 57:575. [PMID: 27485416 DOI: 10.1111/jsap.12542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 05/14/2016] [Accepted: 05/23/2016] [Indexed: 11/29/2022]
Affiliation(s)
- K Kuroda
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - T Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - M Yamashita
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - Y Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - K Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - T Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - N Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - T Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - Y Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
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Osaki T, Ono M, Uto Y, Ishizuka M, Tanaka T, Yamanaka N, Kurahashi T, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Sonodynamic therapy using 5-aminolevulinic acid enhances the efficacy of bleomycin. Ultrasonics 2016; 67:76-84. [PMID: 26799128 DOI: 10.1016/j.ultras.2016.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 12/18/2015] [Accepted: 01/06/2016] [Indexed: 05/25/2023]
Abstract
Sonodynamic therapy (SDT) kills tumor cells through the synergistic effects of ultrasound and a sonosensitizer agent. We examined whether 5-aminolevulinic acid (5-ALA)-based SDT at 1 or 3 MHz could enhance the cytotoxicity of bleomycin (BLM) toward mouse mammary tumor cells both in vitro and in vivo. At 1 MHz, cell viability in the 5-ALA-based SDT group at 1, 2, and 3 W/cm(2) was 34.30%, 50.90%, and 60.16%, respectively. Cell viability in the 5-ALA-based SDT+BLM group at 1, 2, and 3 W/cm(2) was 0.09%, 0.32%, and 0.17%, respectively. In contrast, at 3 MHz, 5-ALA-based SDT+BLM did not show pronounced cytotoxicity. In the in vivo study, 5-ALA-based SDT+BLM was significantly more cytotoxic than 5-ALA-based SDT at 1 MHz and 3 MHz. These findings suggest that the mechanism of tumor shrinkage induced by 5-ALA-based SDT+BLM might involve not only direct cell killing, but also vascular shutdown. Thus, we show here that 5-ALA-based SDT enhances the efficacy of BLM both in vitro and in vivo.
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Affiliation(s)
- Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan.
| | - Misato Ono
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshihiro Uto
- Department of Life System, Institute of Technology and Science, Graduate School, Tokushima University, Tokushima, Japan
| | | | | | | | | | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Norihiko Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, Tottori, Japan
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Tsuka T, Morita T, Tanaka H, Kono S, Murahata Y, Azuma K, Osaki T, Ito N, Okamoto Y, Imagawa T. Nasal tissue-derived hamartoma in the maxillary gingiva of a calf. BMC Vet Res 2016; 12:19. [PMID: 26801628 PMCID: PMC4722635 DOI: 10.1186/s12917-016-0637-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 01/14/2016] [Indexed: 11/10/2022] Open
Abstract
Background All of oral hamartomas has been previously found in mandibular gingiva in younger calves, and were histologically diagnosed as a vascular hamartoma. This is the first case report describing a calf with a mass in the maxillary gingiva that was histologically diagnosed as a nasal tissue-derived hamartoma. Case presentation A 13-day-old male Holstein calf presented with a horn-like mass in the left rostral maxillary gingiva. Surgical removal revealed that the mass had a dual structure composed of cartilaginous and soft tissues and extended deeply toward the nasal cavity. Excised tissues mainly consisted of two types of mature cells without mitotic figures and atypia: 1) the cartilage-like structures consisted of an island and a meandering massive focus of mature cartilaginous tissues, and 2) tubular structures consisting of stratified ciliated mucosal columnar cells with gland-like structures and aggregated goblet cells. The mass was diagnosed as a nasal tissue-derived hamartoma because these two types of structures were histologically identical to nasal structures. The present case had no recurrence at 1 year after surgery. Conclusions To our knowledge, this is the first description of the calf with nasal tissue-derived hamartoma in the maxillary gingiva.
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Affiliation(s)
- Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan.
| | - Takehito Morita
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
| | - Hinako Tanaka
- Tobu Veterinary Clinic, Tottori Prefectural Federation Agricultural Mutual Aid Association, 210-19, Takadote, Kuniyasu, Tottori, Tottori, Japan
| | - Shinji Kono
- Tobu Veterinary Clinic, Tottori Prefectural Federation Agricultural Mutual Aid Association, 210-19, Takadote, Kuniyasu, Tottori, Tottori, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
| | - Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101, Koyama-Minami, Tottori, Tottori, Japan
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Osaki T, Yokoe I, Ogura S, Takahashi K, Murakami K, Inoue K, Ishizuka M, Tanaka T, Li L, Sugiyama A, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Photodynamic detection of canine mammary gland tumours after oral administration of 5-aminolevulinic acid. Vet Comp Oncol 2016; 15:731-739. [DOI: 10.1111/vco.12213] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/17/2015] [Accepted: 12/20/2015] [Indexed: 01/08/2023]
Affiliation(s)
- T. Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - I. Yokoe
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - S. Ogura
- Department of Bioengineering; Tokyo Institute of Technology; Yokohama Japan
| | | | | | - K Inoue
- SBI Pharmaceuticals Co., Ltd.; Tokyo Japan
| | | | - T. Tanaka
- SBI Pharmaceuticals Co., Ltd.; Tokyo Japan
| | - L. Li
- Department of Bio- and Material Photonics; Chitose Institute of Science and Technology; Chitose Japan
| | - A. Sugiyama
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - K. Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - Y. Murahata
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - T. Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - N. Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - T. Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
| | - Y. Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture; Tottori University; Tottori Japan
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Osaki T, Yokoe I, Uto Y, Ishizuka M, Tanaka T, Yamanaka N, Kurahashi T, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Bleomycin enhances the efficacy of sonodynamic therapy using aluminum phthalocyanine disulfonate. Ultrason Sonochem 2016; 28:161-168. [PMID: 26384895 DOI: 10.1016/j.ultsonch.2015.07.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 07/12/2015] [Accepted: 07/14/2015] [Indexed: 05/11/2023]
Abstract
Sonodynamic therapy (SDT), or ultrasound combined with sonosensitization, is a promising approach because it is noninvasive and penetrates deeper than light does in photodynamic therapy. We examined whether bleomycin (BLM) could improve the efficacy of SDT. We performed an in vitro study using Colon-26 cells, which are derived from mouse colon cancer. SDT with BLM was significantly more cytotoxic than SDT alone both in vitro and in vivo. We also observed an ultrasound intensity-dependent cytotoxic effect of SDT with BLM. These findings suggest that SDT with BLM might provide a novel noninvasive treatment for deep-seated tumors.
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Affiliation(s)
- Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan.
| | - Inoru Yokoe
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yoshihiro Uto
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima, Japan
| | | | | | | | | | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, Tottori, Japan
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36
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Kuroda K, Azuma K, Mori T, Kawamoto K, Murahata Y, Tsuka T, Osaki T, Ito N, Imagawa T, Itoh F, Okamoto Y. The Safety and Anti-Tumor Effects of Ozonated Water in Vivo. Int J Mol Sci 2015; 16:25108-20. [PMID: 26506343 PMCID: PMC4632793 DOI: 10.3390/ijms161025108] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/05/2015] [Accepted: 10/12/2015] [Indexed: 01/05/2023] Open
Abstract
Ozonated water is easier to handle than ozone gas. However, there have been no previous reports on the biological effects of ozonated water. We conducted a study on the safety of ozonated water and its anti-tumor effects using a tumor-bearing mouse model and normal controls. Local administration of ozonated water (208 mM) was not associated with any detrimental effects in normal tissues. On the other hand, local administration of ozonated water (20.8, 41.6, 104, or 208 mM) directly into the tumor tissue induced necrosis and inhibited proliferation of tumor cells. There was no significant difference in the number of terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick-end labeling (TUNEL)-positive cells following administration of ozonated water. The size of the necrotic areas was dependent on the concentration of ozonated water. These results indicate that ozonated water does not affect normal tissue and damages only the tumor tissue by selectively inducing necrosis. There is a possibility that it exerts through the production of reaction oxygen species (ROS). In addition, the induction of necrosis rather than apoptosis is very useful in tumor immunity. Based on these results, we believe that administration of ozonated water is a safe and potentially simple adjunct or alternative to existing antineoplastic treatments.
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Affiliation(s)
- Kohei Kuroda
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Kazuo Azuma
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Takuro Mori
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Kinya Kawamoto
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Yusuke Murahata
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Takeshi Tsuka
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Tomohiro Osaki
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Norihiko Ito
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Tomohiro Imagawa
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
| | - Fumio Itoh
- Department of Technical Development, Sakuragawa Pump Co., Ltd., Osaka 567-0005, Japan.
| | - Yoshiharu Okamoto
- Department of Clinical Medicine, Joint School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
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Azuma K, Izumi R, Kawata M, Nagae T, Osaki T, Murahata Y, Tsuka T, Imagawa T, Ito N, Okamoto Y, Morimoto M, Izawa H, Saimoto H, Ifuku S. Effects of Oral Administration of Chitin Nanofiber on Plasma Metabolites and Gut Microorganisms. Int J Mol Sci 2015; 16:21931-49. [PMID: 26378523 PMCID: PMC4613289 DOI: 10.3390/ijms160921931] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 09/05/2015] [Accepted: 09/07/2015] [Indexed: 12/29/2022] Open
Abstract
The aim of this study was to examine the effects of oral administration of chitin nanofibers (CNFs) and surface-deacetylated (SDA) CNFs on plasma metabolites using metabolome analysis. Furthermore, we determined the changes in gut microbiota and fecal organic acid concentrations following oral administrations of CNFs and SDACNFs. Healthy female mice (six-week-old) were fed a normal diet and administered tap water with 0.1% (v/v) CNFs or SDACNFs for 28 days. Oral administration of CNFs increased plasma levels of adenosine triphosphate (ATP), adenosine diphosphate (ADP), and serotonin (5-hydroxytryptamine, 5-HT). Oral administration of SDACNFs affected the metabolisms of acyl-carnitines and fatty acids. The fecal organic level analysis indicated that oral administration of CNFs stimulated and activated the functions of microbiota. These results indicate that oral administration of CNFs increases plasma levels of ATP and 5-HT via activation of gut microbiota.
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Affiliation(s)
- Kazuo Azuma
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Ryotaro Izumi
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Mari Kawata
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Tomone Nagae
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Tomohiro Osaki
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Yusuke Murahata
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Takeshi Tsuka
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Imagawa
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Norihiko Ito
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Yoshiharu Okamoto
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Minoru Morimoto
- Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University, Tottori 680-8550, Japan.
| | - Hironori Izawa
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Hiroyuki Saimoto
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
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Osaki T, Uto Y, Ishizuka M, Tanaka T, Yamanaka N, Kurahashi T, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Sonochemical internalization using 5-aminolevulinic acid enhances the cytotoxic effect of bleomycin. Photodiagnosis Photodyn Ther 2015. [DOI: 10.1016/j.pdpdt.2015.07.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tsuka T, Yamamoto N, Saneshige M, Morita T, Sunden Y, Murahata Y, Azuma K, Osaki T, Ito N, Okamoto Y, Imagawa T. Computed tomographic images of discospondylitis in a calf. J Vet Med Sci 2015; 77:1689-91. [PMID: 26256229 PMCID: PMC4710732 DOI: 10.1292/jvms.15-0194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
A 2-month-old male Japanese Black calf was presented with a 30-day history of progressive
ataxia. Antemortem examination using computed tomography (CT) revealed narrowing of the
disc spaces due to destruction of intervertebral structures between the first and second
thoracic vertebrae and between the second and third thoracic vertebrae. Osteolysis was
evident as irregular hypoattenuating lesions within the opposing end plates of the first,
second and third thoracic vertebrae. Pseudomonas aeruginosa was detected as the causative
bacteria, and discospondylitis was diagnosed. To the best of our knowledge, this is the
first bovine case report describing the application of CT for the diagnosis of
discospondylitis.
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Affiliation(s)
- Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
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Osaki T, Kurozumi S, Sato K, Terashi T, Azuma K, Murahata Y, Tsuka T, Ito N, Imagawa T, Minami S, Okamoto Y. Metabolomic Analysis of Blood Plasma after Oral Administration of N-acetyl-d-Glucosamine in Dogs. Mar Drugs 2015; 13:5007-15. [PMID: 26262626 PMCID: PMC4557012 DOI: 10.3390/md13085007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 07/24/2015] [Indexed: 01/25/2023] Open
Abstract
N-acetyl-d-glucosamine (GlcNAc) is a monosaccharide that polymerizes linearly through (1,4)-β-linkages. GlcNAc is the monomeric unit of the polymer chitin. GlcNAc is a basic component of hyaluronic acid and keratin sulfate found on the cell surface. The aim of this study was to examine amino acid metabolism after oral GlcNAc administration in dogs. Results showed that plasma levels of ectoine were significantly higher after oral administration of GlcNAc than prior to administration (p < 0.001). To our knowledge, there have been no reports of increased ectoine concentrations in the plasma. The mechanism by which GlcNAc administration leads to increased ectoine plasma concentration remains unclear; future studies are required to clarify this mechanism.
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Affiliation(s)
- Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Seiji Kurozumi
- Koyo Chemical Co. Ltd., 1-17 Taiyuji-cho, Kita-ku, Osaka 530-0051, Japan.
| | - Kimihiko Sato
- Koyo Chemical Co. Ltd., 1-17 Taiyuji-cho, Kita-ku, Osaka 530-0051, Japan.
| | - Taro Terashi
- Koyo Chemical Co. Ltd., 1-17 Taiyuji-cho, Kita-ku, Osaka 530-0051, Japan.
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Saburo Minami
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.
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Azuma K, Nagae T, Nagai T, Izawa H, Morimoto M, Murahata Y, Osaki T, Tsuka T, Imagawa T, Ito N, Okamoto Y, Saimoto H, Ifuku S. Effects of Surface-Deacetylated Chitin Nanofibers in an Experimental Model of Hypercholesterolemia. Int J Mol Sci 2015; 16:17445-55. [PMID: 26263969 PMCID: PMC4581201 DOI: 10.3390/ijms160817445] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 07/23/2015] [Accepted: 07/23/2015] [Indexed: 01/05/2023] Open
Abstract
This study evaluated the effects of oral administration of surface-deacetylated chitin nanofibers (SDACNFs) on hypercholesterolemia using an experimental model. All rats were fed a high cholesterol diet with 1% w/w cholesterol and 0.5% w/w cholic acid for 28 days. Rats were divided equally into four groups: the control group was administered 0.05% acetic acid dissolved in tap water, and the SDACNF, chitosan (CS), and cellulose nanofiber (CLNF) groups were administered 0.1% CNF, CS, or CLNF dissolved in the tap water, respectively, during the experimental period. Changes in body weight, intake of food and water, and organ weight were measured. Serum blood chemistry and histopathological examination of the liver were performed. Administration of SDACNF did not affect body weight change, food and water intake, or organ weights. Administration of SDACNF and CS decreased the diet-induced increase in serum total cholesterol, chylomicron, very-low-density lipoprotein, and phospholipid levels on day 14. Moreover, oral administration of SDACNFs suppressed the increase of alanine transaminase levels on day 29 and suppressed vacuolar degeneration and accumulation of lipid droplets in liver tissue. These data indicate that SDACNF has potential as a functional food for patients with hypercholesterolemia.
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Affiliation(s)
- Kazuo Azuma
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomone Nagae
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Takeshi Nagai
- Japan Food Research Laboratories, Tama 206-0025, Japan.
| | - Hironori Izawa
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Minoru Morimoto
- Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University, Tottori 680-8550, Japan.
| | - Yusuke Murahata
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Osaki
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Takeshi Tsuka
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Imagawa
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Norihiko Ito
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Yoshiharu Okamoto
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Hiroyuki Saimoto
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
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Izumi R, Komada S, Ochi K, Karasawa L, Osaki T, Murahata Y, Tsuka T, Imagawa T, Itoh N, Okamoto Y, Izawa H, Morimoto M, Saimoto H, Azuma K, Ifuku S. Favorable effects of superficially deacetylated chitin nanofibrils on the wound healing process. Carbohydr Polym 2015; 123:461-7. [DOI: 10.1016/j.carbpol.2015.02.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 10/24/2022]
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Azuma K, Nishihara M, Shimizu H, Itoh Y, Takashima O, Osaki T, Itoh N, Imagawa T, Murahata Y, Tsuka T, Izawa H, Ifuku S, Minami S, Saimoto H, Okamoto Y, Morimoto M. Biological adhesive based on carboxymethyl chitin derivatives and chitin nanofibers. Biomaterials 2015; 42:20-9. [DOI: 10.1016/j.biomaterials.2014.11.043] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 11/14/2014] [Accepted: 11/24/2014] [Indexed: 10/24/2022]
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44
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Yokoe I, Azuma K, Hata K, Mukaiyama T, Goto T, Tsuka T, Imagawa T, Itoh N, Murahata Y, Osaki T, Minami S, Okamoto Y. Clinical systemic lupeol administration for canine oral malignant melanoma. Mol Clin Oncol 2014; 3:89-92. [PMID: 25469276 DOI: 10.3892/mco.2014.450] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 07/15/2014] [Indexed: 12/23/2022] Open
Abstract
Canine oral malignant melanoma (COMM) is the most aggressive malignant tumor in dogs. Lupeol is a triterpene extracted from various fruits and vegetables that reportedly inhibits melanoma cell proliferation in vitro and in vivo. In this study, the efficacy of subcutaneous lupeol for spontaneous COMM was evaluated. A total of 11 dogs (3, 5 and 3 dogs diagnosed with clinical stage I, II and III melanoma, respectively) were evaluated. Subcutaneous lupeol (10 mg/kg) was administered postoperatively at various time points to treat these 11 COMM cases. Of the 11 subjects, 7 exhibited no local recurrence 180 days postoperatively and no severe adverse effects were observed in any of the cases. Furthermore, no distant metastasis was observed during the experimental period. Therefore, systemic lupeol may prevent local tumor progression and distant metastasis and may be a novel adjuvant treatment for the treatment of COMM.
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Affiliation(s)
- Inoru Yokoe
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Kazuo Azuma
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Keishi Hata
- Institute for Food and Brewing, Akita Prefectural Agricultural, Forestry and Fisheries Research Center, Akita 010-1623, Japan
| | | | - Takahiro Goto
- Sakamoto Bio Co., Ltd., Yuuwa-Memeki, Akita 010-1233, Japan
| | - Takeshi Tsuka
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Itoh
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Saburo Minami
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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45
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Tsuka T, Murahata Y, Azuma K, Osaki T, Ito N, Okamoto Y, Imagawa T. Quantitative evaluation of the relationship between dorsal wall length, sole thickness, and rotation of the distal phalanx in the bovine claw using computed tomography. J Dairy Sci 2014; 97:6271-85. [DOI: 10.3168/jds.2014-8131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 06/23/2014] [Indexed: 11/19/2022]
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46
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Murahata Y, Miki Y, Hikasa Y. Antagonistic effects of atipamezole, yohimbine, and prazosin on xylazine-induced diuresis in clinically normal cats. Can J Vet Res 2014; 78:304-315. [PMID: 25356000 PMCID: PMC4170770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 09/09/2013] [Indexed: 06/04/2023]
Abstract
This study aimed to investigate and compare the antagonistic effects of atipamezole, yohimbine, and prazosin on xylazine-induced diuresis in clinically normal cats. Five cats were repeatedly used in each of the 9 groups. One group was not medicated. Cats in the other groups received 2 mg/kg BW xylazine intramuscularly, and saline (as the control); 160 μg/kg BW prazosin; or 40, 160, or 480 μg/kg BW atipamezole or yohimbine intravenously 0.5 h later. Urine and blood samples were collected 10 times over 8 h. Urine volume, pH, and specific gravity; plasma arginine vasopressin (AVP) concentration; and creatinine, osmolality, and electrolyte values in both urine and plasma were measured. Both atipamezole and yohimbine antagonized xylazine-induced diuresis, but prazosin did not. The antidiuretic effect of atipamezole was more potent than that of yohimbine but not dose-dependent, in contrast to the effect of yohimbine at the tested doses. Both atipamezole and yohimbine reversed xylazine-induced decreases in both urine specific gravity and osmolality, and the increase in free water clearance. Glomerular filtration rate, osmolar clearance, and plasma electrolyte concentrations were not significantly altered. Antidiuresis of either atipamezole or yohimbine was not related to the area under the curve for AVP concentration, although the highest dose of both atipamezole and yohimbine increased plasma AVP concentration initially and temporarily, suggesting that this may in part influence antidiuretic effects of both agents. The diuretic effect of xylazine in cats may be mediated by α2-adrenoceptors but not α1-adrenoceptors. Atipamezole and yohimbine can be used as antagonistic agents against xylazine-induced diuresis in clinically normal cats.
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Affiliation(s)
| | | | - Yoshiaki Hikasa
- Address all correspondence to Dr. Yoshiaki Hikasa; telephone: (81) 857-31-5431; fax: (81) 857-31-5431; e-mail:
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Nishii N, Takashima S, Iguchi A, Murahata Y, Matsuu A, Hikasa Y, Kitagawa H. Effects of sitagliptin on plasma incretin concentrations after glucose administration through an esophagostomy tube or feeding in healthy cats. Domest Anim Endocrinol 2014; 49:14-9. [PMID: 25010023 DOI: 10.1016/j.domaniend.2014.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 04/10/2014] [Accepted: 04/29/2014] [Indexed: 02/07/2023]
Abstract
We investigated the effect of sitagliptin, a dipeptidyl peptidase 4 inhibitor, on plasma incretin concentrations after glucose administration through an esophagostomy tube or feeding in healthy cats. Six cats were used for the glucose administration experiment and 5 cats were used for the feeding experiment. Glucose administration through an esophagostomy tube increased plasma glucagon-like peptide 1 (GLP-1) concentrations by 6-fold, whereas plasma glucose-dependent insulinotropic polypeptide (GIP) concentrations did not change. Feeding increased both plasma GLP-1 concentrations by 1.5-fold and GIP concentrations by 4.6-fold. Sitagliptin was administered through an esophagostomy tube (25 and 50 mg per cat) in the glucose administration experiment and orally (25 mg per cat) in the feeding experiment. Sitagliptin treatment potentiated the GLP-1 response to glucose by 1.5-fold (P < 0.05). In addition, postprandial plasma GLP-1 concentration was higher by 2-fold when sitagliptin was administered (P < 0.05). In contrast, administration of sitagliptin did not affect plasma GIP concentrations after glucose administration or feeding. Sitagliptin enhanced insulin secretion following glucose administration by 1.5-fold (P < 0.05); however, it did not influence the plasma glucose concentration. Furthermore, sitagliptin had no effect on the postprandial plasma glucose and insulin concentrations. In conclusion, this study provides no evidence that sitagliptin is beneficial for management of feline diabetes mellitus.
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Affiliation(s)
- N Nishii
- Laboratory of Veterinary Internal Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan.
| | - S Takashima
- Laboratory of Veterinary Internal Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - A Iguchi
- Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Y Murahata
- Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - A Matsuu
- Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Y Hikasa
- Laboratory of Veterinary Internal Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - H Kitagawa
- Laboratory of Veterinary Internal Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
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Azuma K, Osaki T, Kurozumi S, Kiyose M, Tsuka T, Murahata Y, Imagawa T, Itoh N, Minami S, Sato K, Okamoto Y. Anti-inflammatory effects of orally administered glucosamine oligomer in an experimental model of inflammatory bowel disease. Carbohydr Polym 2014; 115:448-56. [PMID: 25439918 DOI: 10.1016/j.carbpol.2014.09.012] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/08/2014] [Accepted: 09/11/2014] [Indexed: 01/12/2023]
Abstract
Anti-inflammatory effects of oral administration of the glucosamine oligomers (chito-oligosaccharides: COS) were evaluated in an experimental model of inflammatory bowel disease (IBD). Oral administration of COS improved shortening of colon length and tissue injury (as assessed by histology) in mice. Oral administration of COS inhibited inflammation in the colonic mucosa by suppression of myeloperoxidase activation in inflammatory cells, as well as activation of nuclear factor-kappa B, cyclooxygenase-2, and inducible nitric oxide synthase. Oral administration of COS also reduced serum levels of pro-inflammatory cytokines (tumor necrosis factor-α and interleukin-6). Moreover, it prolonged survival time in mice. These data suggest that COS have anti-inflammatory effects in an experimental model of IBD, and could be new functional foods for IBD patients.
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Affiliation(s)
- Kazuo Azuma
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan.
| | - Tomohiro Osaki
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan
| | - Seiji Kurozumi
- Koyo Chemical Co. Ltd., 3-11-15 Iidabashi, Chiyodaku, Tokyo 102-0072, Japan
| | - Masatoshi Kiyose
- Koyo Chemical Co. Ltd., 3-11-15 Iidabashi, Chiyodaku, Tokyo 102-0072, Japan
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan
| | - Norihiko Itoh
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan
| | - Saburo Minami
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan
| | - Kimihiko Sato
- Koyo Chemical Co. Ltd., 3-11-15 Iidabashi, Chiyodaku, Tokyo 102-0072, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, School of Veterinary Medicine, Tottori University, 4-101 Koyama-minami, Tottori 680-8553, Japan.
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Murahata Y, Yamamoto A, Miki Y, Hikasa Y. Antagonistic effects of atipamezole, yohimbine and prazosin on medetomidine-induced diuresis in healthy cats. J Vet Med Sci 2013; 76:173-82. [PMID: 24107430 PMCID: PMC3982822 DOI: 10.1292/jvms.13-0398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
This study aimed to investigate and compare the antagonistic effects of atipamezole, yohimbine and prazosin on medetomidine-induced diuresis in healthy cats. Five cats were repeatedly used in each of the 9 groups. One group was not medicated. Cats in the other groups received 40 µg/kg medetomidine intramuscularly and saline (as the control), 160 µg/kg prazosin, or 40, 160 or 480 µg/kg atipamezole or yohimbine intravenously 0.5 hr later. Volume, pH and specific gravity of urine; plasma arginine vasopressin (AVP) level; and creatinine, osmolality and electrolyte levels in both urine and plasma were measured. Both atipamezole and yohimbine, but not prazosin, antagonized medetomidine-induced diuresis. The antidiuretic effect of atipamezole was more potent than that of yohimbine, but was not dose dependent, in contrast to the effect of yohimbine at the tested doses. Both atipamezole and yohimbine reversed medetomidine-induced decreases in both urine specific gravity and osmolality and increases in plasma osmolality and free-water clearance. Antidiuresis of either atipamezole or yohimbine was not related to the area under the curve for AVP level, although the highest dose of both atipamezole and yohimbine initially and temporarily increased plasma AVP levels, suggesting that this may partly influence the antidiuretic effects of both agents. The diuretic effect of medetomidine in cats may be mediated by α2-adrenoceptors, but not α1-adrenoceptors. Atipamezole and yohimbine can be used as antagonistic agents against medetomidine-induced diuresis in healthy cats.
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Affiliation(s)
- Yusuke Murahata
- Laboratory of Veterinary Internal Medicine, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
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50
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Abstract
OBJECTIVE To investigate dose-related diuretic effects of medetomidine hydrochloride and xylazine hydrochloride in healthy cats. ANIMALS 5 sexually intact cats (4 males and 1 female). PROCEDURES The 5 cats received each of 11 treatments. Cats were treated by IM administration of saline (0.9% NaCl) solution (control treatment), medetomidine hydrochloride (20, 40, 80, 160, and 320 μg/kg), and xylazine hydrochloride (0.5, 1, 2, 4, and 8 mg/kg). Urine and blood samples were collected 9 times during a 24-hour period. Variables measured were urine volume, pH, and specific gravity; plasma arginine vasopressin (AVP) concentration; and creatinine and electrolyte concentrations as well as osmolality in both urine and plasma. RESULTS Both medetomidine and xylazine increased urine production for up to 5 hours after injection. Xylazine had a dose-dependent diuretic effect, but medetomidine did not. Urine specific gravity and osmolality decreased in a dose-dependent manner for both drugs. Free-water clearance increased for up to 5 hours after injection, whereas glomerular filtration rate, osmolar clearance, plasma osmolality, and electrolyte concentrations did not change significantly. Area under the curve for AVP concentrations decreased in a dose-dependent manner for medetomidine but not for xylazine; however, this was not related to diuresis. CONCLUSIONS AND CLINICAL RELEVANCE Both medetomidine and xylazine induced profound diuresis in cats by decreasing reabsorption of water in the kidneys. The diuretic effect of medetomidine, including the change in AVP concentration, differed from that of xylazine. Care must be used when administering these drugs to cats with urinary tract obstruction, hypovolemia, or dehydration.
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Affiliation(s)
- Yusuke Murahata
- Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Koyama-Minami 4-101, Tottori 680-8553, Japan
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