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Ogami K, Hagio M, Ueda T. Maxillary Obturator Prosthesis Made with Polyetherketoneketone Using Optical Impression and CAD/CAM System. Bull Tokyo Dent Coll 2023; 64:31-37. [PMID: 36792151 DOI: 10.2209/tdcpublication.2022-0020] [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] [Indexed: 02/16/2023]
Abstract
This report describes the case of a 68-year-old man who visited our department complaining of poor denture retention and difficulty masticating due to damage to the retainer of a maxillary obturator. The patient had never been satisfied with the fit of this prosthesis, which had been placed two years earlier. The obturator and the mucosal surface of the denture base were incompatible, which had caused the retainer to detach. The maxillary defect was categorized as H3S0D0T0 according to the HS classification. The diagnosis was a masticatory disorder due to a damaged retainer and an incompatible denture base. Optical impressions and occlusal records were taken and a maxillary obturator fabricated using a CAD/CAM system. Dental CAD software was used to design and complete the tooth arrangement. The CAM system was used to mill a polyetherketoneketone disc based on the obtained data and composite resin used to face the teeth and gingiva. The maxillary obturator was placed after only three visits, spanning from impression taking to denture completion. The use of digital data allowed the time to denture completion to be shortened in addition to the number of hospital visits to be reduced. Compared to conventional impression taking, optical impressions also prevent discomfort, decreasing stress for the patient.
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Affiliation(s)
- Koichiro Ogami
- Division of General Dentistry, Chiba Dental Center, Tokyo Dental College
| | - Miki Hagio
- Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College
| | - Takayuki Ueda
- Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College
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2
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Hagio M, Ishizaki K, Ryu M, Nomura T, Takano N, Sakurai K. Maxillofacial prosthetic treatment factors affecting oral health-related quality of life after surgery for patients with oral cancer. J Prosthet Dent 2017; 119:663-670. [PMID: 28888409 DOI: 10.1016/j.prosdent.2017.05.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 05/31/2017] [Accepted: 05/31/2017] [Indexed: 11/20/2022]
Abstract
STATEMENT OF PROBLEM After oral cancer surgery, tissue defects can cause deformity and limited mobility, complicating many essential functions. For patients with mandibular, tongue, and oral floor defects, evidence regarding the effects of maxillofacial prosthetics on their oral health-related quality of life (OHRQoL) is lacking. Therefore, maxillofacial prosthetic reconstruction has been implemented with no clear treatment goals. PURPOSE The purpose of this clinical study was to identify factors affecting the improvement of OHRQoL by using maxillofacial prosthetic treatment after surgery to repair maxillary, mandibular, tongue, and oral floor defects. MATERIAL AND METHODS All individuals who agreed to maxillofacial prosthetics after surgery for oral cancer were enrolled. Oral function and OHRQoL were evaluated before maxillofacial prosthesis placement and 1 month after final adjustments. The oral functions evaluated included masticatory function, swallowing function, and articulatory function. The Oral Health Impact Profile (OHIP-J54) was used to evaluate OHRQoL. Factors affecting changes in the OHIP-J54 score for participants' background and oral functions before and after treatment were analyzed through logistic regression analysis (stepwise method). RESULTS Participants included 34 men and 16 women with an average age of 72.4 ±8.7 years. "Psychological discomfort" was correlated with the patient's sex and masticatory function. "Physical disability" was related to articulatory function. "Handicap" was related to the swallowing function. "Additional Japanese questions" were related to the patient's sex. CONCLUSIONS Participants' sex and their oral functions, including masticatory, swallowing, and articulatory functions, were associated with improved OHRQoL because of maxillofacial prosthetics after surgery for oral cancer.
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Affiliation(s)
- Miki Hagio
- Graduate student, Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan
| | - Ken Ishizaki
- Associate Professor, Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan.
| | - Masahiro Ryu
- Senior Assistant professor, Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan
| | - Takeshi Nomura
- Professor, Department of Oral Medicine and Oral and maxillofacial surgery, Tokyo Dental College, Chiba Japan
| | - Nobuo Takano
- Professor, Oral Cancer Center, Tokyo Dental College, Chiba, Japan
| | - Kaoru Sakurai
- Professor, Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College, Tokyo, Japan
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Sakurai I, Hagio M, Gombos Z, Tyystjarvi T, Paakkarinen V, Aro EM, Wada H. Requirement of phosphatidylglycerol for maintenance of photosynthetic machinery. Plant Physiol 2003; 133:1376-84. [PMID: 14551333 PMCID: PMC281632 DOI: 10.1104/pp.103.026955] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2003] [Revised: 06/10/2003] [Accepted: 08/17/2003] [Indexed: 05/20/2023]
Abstract
Phosphatidylglycerol (PG) is a ubiquitous component of thylakoid membranes. Experiments with the pgsA mutant of the cyanobacterium Synechocystis sp. PCC6803 defective in biosynthesis of PG have demonstrated an indispensable role of PG in photosynthesis. In the present study, we have investigated the light susceptibility of the pgsA mutant with regard to the maintenance of the photosynthetic machinery. Growth of the mutant cells without PG increased the light susceptibility of the cells and resulted in severe photoinhibition of photosynthesis upon a high-light treatment, whereas the growth in the presence of PG was protected against photoinhibition. Photoinhibition induced by PG deprivation was mainly caused by an impairment of the restoration process. The primary target of the light-induced damage in thylakoid membranes, the D1 protein of photosystem (PS) II was, however, synthesized and degraded with similar rates irrespective of whether the mutant cells were incubated with PG or not. Intriguingly, it was found that instead of the synthesis of the D1 protein, the dimerization of the PSII core monomers was impaired in the PG-deprived mutant cells. Addition of PG to photoinhibited cells restored the dimerization capacity of PSII core monomers. These results suggest that PG plays an important role in the maintenance of the photosynthetic machinery through the dimerization and reactivation of the PSII core complex.
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Affiliation(s)
- Isamu Sakurai
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Tokyo 153-8902, Japan
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Abstract
A crossover study design was used to investigate the dose-related effects of sevoflurane at end-tidal concentrations of 2.2 to 4.4 per cent on the respiratory rate, blood gases, heart rate, arterial blood pressure and ocular signs of chickens during spontaneous and controlled ventilation. The mean (sd) carbon dioxide partial pressure (PaCO2) increased as the concentration of sevoflurane increased, and was 86 (29) mmHg at an end-tidal concentration of 4.4 per cent during spontaneous ventilation, but was maintained between 29 and 42 mmHg during controlled ventilation. The heart rate increased as the concentration of sevoflurane increased during spontaneous ventilation, but did not change during controlled ventilation. Sevoflurane decreased arterial blood pressure during both spontaneous and controlled ventilation, but a dose-dependent decrease in arterial blood pressure was observed only during controlled ventilation. The mean arterial blood pressure at an end-tidal concentration of 4.4 per cent was significantly higher during spontaneous ventilation than during controlled ventilation. Controlled ventilation prevented the increases in PaCO2 and heart rate that were observed during spontaneous ventilation. The decrease in arterial blood pressure during spontaneous ventilation was less than that during controlled ventilation, possibly owing to the effects of hypercapnia.
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Affiliation(s)
- K Naganobu
- Department of Veterinary Science, Faculty of Agriculture, Miyazaki University, Miyazaki 889-2192, Japan
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Hagio M, Sakurai I, Sato S, Kato T, Tabata S, Wada H. Phosphatidylglycerol is essential for the development of thylakoid membranes in Arabidopsis thaliana. Plant Cell Physiol 2002; 43:1456-64. [PMID: 12514242 DOI: 10.1093/pcp/pcf185] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Phosphatidylglycerol is a ubiquitous phospholipid in the biological membranes of many organisms. In plants, phosphatidylglycerol is mainly present in thylakoid membranes and has been suggested to play specific roles in photosynthesis. Here, we have isolated two T-DNA tagged lines of Arabidopsis thaliana that have a T-DNA insertion in the PGP1 gene encoding a phosphatidylglycerolphosphate synthase involved in the biosynthesis of phosphatidylglycerol. In homozygous plants of the T-DNA tagged lines, the PGP1 gene was completely disrupted. The growth of these knockout mutants was dependent on the presence of sucrose in the growth medium, and these plants had pale yellow-green leaves. The leaves of the mutants had remarkably large intercellular spaces due to the reduction in the number of mesophyll cells. The development of chloroplasts in the leaf cells was severely arrested in the mutants. Mesophyll cells with chloroplast particles are only found around vascular structures, whereas epidermal cells are enlarged but largely conserved. The content of phosphatidylglycerol in the mutants was reduced to 12% of that of the wild type. These results demonstrate that PGP1 plays a major role in the biosynthesis of phosphatidylglycerol in chloroplasts, and that phosphatidylglycerol is essential for the development of thylakoid membranes in A. thaliana.
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Affiliation(s)
- Miki Hagio
- Department of Biology, Faculty of Sciences, Kyushu University, Ropponmatsu, Fukuoka, 810-8560 Japan
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Xu C, Härtel H, Wada H, Hagio M, Yu B, Eakin C, Benning C. The pgp1 mutant locus of Arabidopsis encodes a phosphatidylglycerolphosphate synthase with impaired activity. Plant Physiol 2002; 129:594-604. [PMID: 12068104 PMCID: PMC161686 DOI: 10.1104/pp.002725] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2002] [Revised: 02/08/2002] [Accepted: 02/19/2002] [Indexed: 05/20/2023]
Abstract
Phosphatidylglycerol is a ubiquitous phospholipid that is also present in the photosynthetic membranes of plants. Multiple independent lines of evidence suggest that this lipid plays a critical role for the proper function of photosynthetic membranes and cold acclimation. In eukaryotes, different subcellular compartments are competent for the biosynthesis of phosphatidylglycerol. Details on the plant-specific pathways in different organelles are scarce. Here, we describe a phosphatidylglycerol biosynthesis-deficient mutant of Arabidopsis, pgp1. The overall content of phosphatidylglycerol is reduced by 30%. This mutant carries a point mutation in the CDP-alcohol phosphotransferase motif of the phosphatidylglycerolphosphate synthase (EC 2.7.8.5) isoform encoded by a gene on chromosome 2. The mutant shows an 80% reduction in plastidic phosphatidylglycerolphosphate synthase activity consistent with the plastidic location of this particular isoform. Mutant plants are pale green, and their photosynthesis is impaired. This mutant provides a promising new tool to elucidate the biosynthesis and function of plastidic phosphatidylglycerol in seed plants.
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Affiliation(s)
- Changcheng Xu
- Department of Biology, Faculty of Sciences, Kyushu University, Ropponmatsu, Fukuoka 810-8560, Japan
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Gombos Z, Várkonyi Z, Hagio M, Iwaki M, Kovács L, Masamoto K, Itoh S, Wada H. Phosphatidylglycerol requirement for the function of electron acceptor plastoquinone Q(B) in the photosystem II reaction center. Biochemistry 2002; 41:3796-802. [PMID: 11888298 DOI: 10.1021/bi011884h] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Phosphatidylglycerol (PG), a ubiquitous constituent of thylakoid membranes of chloroplasts and cyanobacteria, is demonstrated to be essential for the functionality of plastoquinone electron acceptor Q(B) in the photosystem II reaction center of oxygenic photosynthesis. Growth of the pgsA mutant cells of Synechocystis sp. PCC6803 that are defective in phosphatidylglycerolphosphate synthase and are incapable of synthesizing PG, in a medium without PG, resulted in a 90% decrease in PG content and a 50% loss of photosynthetic oxygen-evolving activity as reported [Hagio, M., Gombos, Z., Várkonyi, Z., Masamoto, K., Sato, N., Tsuzuki, M., and Wada, H. (2000) Plant Physiol. 124, 795-804]. We have studied each step of the electron transport in photosystem II of the pgsA mutant to clarify the functional site of PG. Accumulation of Q(A)(-) was indicated by the fast rise of chlorophyll fluorescence yield under continuous and flash illumination. Oxidation of Q(A)(-) by Q(B) plastoquinone was shown to become slow, and Q(A)(-) reoxidation required a few seconds when measured by double flash fluorescence measurements. Thermoluminescence measurements further indicated the accumulation of the S(2)Q(A)(-) state but not of the S(2)Q(B)(-) state following the PG deprivation. These results suggest that the function of Q(B) plastoquinone was inactivated by the PG deprivation. We assume that PG is an indispensable component of the photosystem II reaction center complex to maintain the structural integrity of the Q(B)-binding site. These findings provide the first clear identification of a specific functional site of PG in the photosynthetic reaction center.
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Affiliation(s)
- Zoltán Gombos
- Department of Biology, Faculty of Sciences, Kyushu University, Ropponmatsu, Fukuoka 810-8560, Japan
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Okano S, Yoshida M, Fukushima U, Higuchi S, Takase K, Hagio M. Usefulness of systemic inflammatory response syndrome criteria as an index for prognosis judgement. Vet Rec 2002; 150:245-6. [PMID: 11916026 DOI: 10.1136/vr.150.8.245] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- S Okano
- Department of Small Animal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan
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Abstract
OBJECTIVE To determine effects of hypercapnia on arrhythmias in ducks anesthetized with halothane. ANIMALS 12 ducks, 6 to 8 months old, weighing 1.1 to 1.6 kg. PROCEDURES Each duck was anesthetized with a 1.5% mixture of halothane in oxygen, and anesthetic depth was stabilized during a 20-minute period. We added CO2 to the inspired oxygen to produce CO2 partial pressures of 40, 60, and 80 mm Hg in the inspired gas mixture.The CO2 partial pressure was increased in a stepwise manner. When arrhythmias were not evident during inhalation of the gas mixture at a specific CO2 partial pressure, the CO2 partial pressure was maintained for 10 minutes before a sample was collected for blood gas analysis. When arrhythmias were detected, a sample for blood gas analysis was collected after the CO2 partial pressure was maintained for at least 2 minutes, and CO2 inhalation then was terminated. RESULTS During the stabilization period, PaCO2 (mean +/- SD) was 33 +/- 5 mm Hg,and arrhythmias were not detected. In 6 ducks, arrhythmias such as unifocal and multifocal premature ventricular contractions developed during inhalation of CO2. Mean PaCO2 at which arrhythmias developed was 67 +/- 12 mm Hg. In 5 of 6 ducks with arrhythmias, the arrhythmias disappeared after CO2 inhalation was terminated. CONCLUSION AND CLINICAL RELEVANCE Analysis of data from this study indicated that hypercapnia can lead to arrhythmias in ducks during halothane-induced anesthesia. Thus, ventilatory support to maintain normocapnia is important for managing ducks anesthetized with halothane.
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Affiliation(s)
- K Naganobu
- Department of Veterinary Science, Faculty of Agriculture, Miyazaki University, Japan
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Knight DH, Atkins CE, Atwell RB, Courtney CH, Dillon R, Genchi C, Hagio M, Holmes RA, Lukof DK, McCall JW, Venco L. 1999 guidelines for the diagnosis, treatment, and prevention of heartworm (Dirofilaria immitis) infection in cats. Vet Ther 2001; 2:78-87. [PMID: 19753701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- D H Knight
- North Carolina State University, North Carolina, USA
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11
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Sato N, Hagio M, Wada H, Tsuzuki M. Environmental effects on acidic lipids of thylakoid membranes. Biochem Soc Trans 2000; 28:912-4. [PMID: 11171255] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The contents of the chloroplast acidic lipids, SQDG (sulphoquinovosyldiacylglycerol) and PG (phosphatidylglycerol), were reduced in the cells of Chlamydomonas reinhartdtii with exposure to sulphur- or phosphorus-source limitation, respectively. The decrease in the content of one acidic lipid was accompanied by an increase in the content of the other acidic lipid, which resulted in the maintenance of a certain level of total acidic lipids of chloroplast membranes. On the other hand, the content of each acidic lipid was little affected by temperature stresses during cell growth.
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Affiliation(s)
- N Sato
- School of Life Science, Tokyo University of Pharmacy and Life Science, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
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12
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Hagio M, Gombos Z, Várkonyi Z, Masamoto K, Sato N, Tsuzuki M, Wada H. Direct evidence for requirement of phosphatidylglycerol in photosystem II of photosynthesis. Plant Physiol 2000; 124:795-804. [PMID: 11027727 PMCID: PMC59183 DOI: 10.1104/pp.124.2.795] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2000] [Accepted: 06/09/2000] [Indexed: 05/18/2023]
Abstract
Phosphatidylglycerol (PG) is considered to play an important role in the ordered assembly and structural maintenance of the photosynthetic apparatus in thylakoid membranes. However, its function in photosynthesis remains poorly understood. In this study we have identified a pgsA gene of Synechocystis sp. PCC6803 that encodes a PG phosphate synthase involved in the biosynthesis of PG. A disruption of the pgsA gene allowed us to manipulate the content of PG in thylakoid membranes and to investigate the function of PG in photosynthesis. The obtained pgsA mutant could grow only in the medium containing PG, and the photosynthetic activity of the pgsA mutant dramatically decreased with a concomitant decrease of PG content in thylakoid membranes when the cells grown in the presence of PG were transferred to the medium without PG. This decrease of photosynthetic activity was attributed to the decrease of photosystem (PS)II activity, but not to the decrease in PSI activity. These findings demonstrate that PG is essential for growth of Synechocystis sp. PCC6803 and provide the first direct evidence that PG plays an important role in PSII.
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Affiliation(s)
- M Hagio
- Department of Biology, Graduate School of Sciences, Kyushu University, Ropponmatsu, Fukuoka 810-8560, Japan
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Sato N, Hagio M, Wada H, Tsuzuki M. Requirement of phosphatidylglycerol for photosynthetic function in thylakoid membranes. Proc Natl Acad Sci U S A 2000; 97:10655-60. [PMID: 10984546 PMCID: PMC27080 DOI: 10.1073/pnas.97.19.10655] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2000] [Accepted: 06/30/2000] [Indexed: 11/18/2022] Open
Abstract
To investigate the role of phosphatidylglycerol (PG) in photosynthesis, we constructed a mutant defective in the CDP-diacylglycerol synthase gene from a cyanobacterium, Synechocystis sp. PCC6803. The mutant, designated as SNC1, required PG supplementation for growth. Growth was repressed in PG-free medium concomitantly with the decrease in cellular content of PG. These results indicate that PG is essential, and that SNC1 is defective in PG synthesis. Decrease in PG content was accompanied by a reduction in the cellular content of chlorophyll, but with little effect on the contents of phycobilisome pigments, which showed that levels of chlorophyll-protein complexes decreased without alteration of those of phycobilisomes. Regardless of the decrease in the PG content, CO(2)-dependent photosynthesis by SNC1 was similar to that by the wild type on a chlorophyll basis, but consequently became lower on a cell basis. Simultaneously, the ratio of oxygen evolution of photosystem II (PSII) measured with p-benzoquinone to that of CO(2)-dependent photosynthesis, which ranged between 1.3 and 1.7 in the wild type. However, it was decreased in SNC1 from 1.3 to 0.4 during the early growth phase where chlorophyll content and CO(2)-dependent photosynthesis were little affected, and then finally to 0.1, suggesting that PSII first lost its ability to reduce p-benzoquinone and then decreased in its level and actual activity. These results indicate that PG contributes to the accumulation of chlorophyll-protein complexes in thylakoid membranes, and also to normal functioning of PSII.
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Affiliation(s)
- N Sato
- School of Life Science, Tokyo University of Pharmacy and Life Science, Horinouchi, Hachioji, Tokyo 192-0392, Japan
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Naganobu K, Hasebe Y, Uchiyama Y, Hagio M, Ogawa H. A comparison of distilled water and normal saline as diluents for endobronchial administration of epinephrine in the dog. Anesth Analg 2000; 91:317-21. [PMID: 10910841 DOI: 10.1097/00000539-200008000-00016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
UNLABELLED We compared the effects of distilled water and normal saline as diluents for the endobronchial administration of epinephrine in anesthetized dogs by using a cross-over design. Six dogs received 2 mL of either normal saline or distilled water into the bronchus, and the other solution was administered 1 wk later. Eight dogs received 0.02 mg/kg epinephrine diluted in either distilled water (E + water) or normal saline (E + saline) to a total volume of 2 mL into the bronchus, and the other solution was administered 1 wk later. Normal saline or distilled water without epinephrine did not affect the plasma epinephrine concentration, mean arterial pressure (MAP), and PaO(2). The peak plasma epinephrine concentration was significantly larger after treatment with E + water (26.5 +/- 7.9 ng/mL) than after E + saline (2.1 +/- 0.7 ng/mL). E + water caused an increase in MAP of 91 +/- 24 mm Hg, whereas E + saline did not affect MAP. The maximal decrease in PaO(2) after the administration of E + water (14 +/- 5 mm Hg) was significantly greater than after E + saline (7 +/- 2 mm Hg). In conclusion, distilled water as the diluent for endobronchially administered epinephrine to a total volume of 2 mL allowed better absorption of epinephrine compared with normal saline without a serious detrimental effect on PaO(2). IMPLICATIONS Using a small volume of distilled water as the diluent for endobronchial epinephrine administration significantly increased epinephrine absorption and arterial pressure in comparison with normal saline, without having a serious detrimental effect on PaO(2), in an anesthetized, noncardiopulmonary, resuscitation dog model.
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Affiliation(s)
- K Naganobu
- Department of Veterinary Science, Faculty of Agriculture, Miyazaki University, Japan.
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Abstract
We studied cardiovascular effects of isoflurane in chickens during controlled ventilation. Following the determination of the minimal anesthetic concentration from the response to clamping of a digit, dose-related effect of isoflurane on heart rate and arterial pressure were studied. The minimal anesthetic concentration of isoflurane was 1.25 +/- 0.13% (mean +/- SD, n=9). There was a dose-dependent decrease in arterial pressure. The heart rate did not change significantly over a range of 1 to 2 times the minimal anesthetic concentration.
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Affiliation(s)
- K Naganobu
- Department of Veterinary Science, Faculty of Agriculture, Miyazaki University, Japan
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16
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Fukushima U, Miyashita K, Okano S, Higuchi S, Takase K, Hagio M. Evaluation of intracranial pressure by transcranial Doppler ultrasonography in dogs with intracranial hypertension. J Vet Med Sci 2000; 62:353-5. [PMID: 10770614 DOI: 10.1292/jvms.62.353] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Transcranial Doppler ultrasonography (TCD) has been used to confirm changes in cerebral hemodynamics. In this study, we investigated whether the parameters for the basilar artery measured by TCD were correlated with the intracranial and cerebral perfusion pressures in extreme intracranial hypertension. An intracranial hypertension model was produced in seven dogs by inflating a balloon inserted into the epidural space. The resistance index was compared with the corresponding intracranial pressure and cerebral perfusion pressure values during intracranial hypertension. A significant correlation was recognized between the resistance index and cerebral perfusion pressure. Therefore, measurement of the basilar artery by TCD in the dog with intracranial hypertension is useful in estimating the intracranial circulation in cases where the measurement of intracranial pressure is not available or not indicated.
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Affiliation(s)
- U Fukushima
- Department of Small Animal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasuro University, Towada, Aomori, Japan
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Fukushima U, Sasaki S, Okano S, Oyamada T, Yoshikawa T, Hagio M, Takase K. Non-invasive diagnosis of ischemic brain damage after cardiopulmonary resuscitation in dogs by using transcranial Doppler ultrasonography. Vet Radiol Ultrasound 2000; 41:172-7. [PMID: 10779079 DOI: 10.1111/j.1740-8261.2000.tb01473.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
We have attempted to identify whether it is possible to utilize transcranial Doppler ultrasonography to evaluate the brain damage that occurs after resuscitation from 3 min (control group) and 12 min (damage group) of cardiac arrest in dogs. In this study we used transcranial Doppler ultrasonography to follow the basilar arterial flow and middle cerebral arterial flow for 180 min following the induction of cardiac arrests. Two abnormal waveform patterns (the "to-and-fro" and "diastolic no-flow" patterns) were found in all dogs in the damage group whereas abnormal waveforms were not detected in the control group. Pathological diagnosis revealed that, compared with the control group, the damage group recognized ischemic alteration at the level of the hippocampus and caudate nucleus. In conclusion, this study shows that the basilar arterial flow of observed with transcranial Doppler ultrasonography may be use for the prediction of outcome and the diagnosis of brain damage in the dog.
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Affiliation(s)
- U Fukushima
- Department of Small Animal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan
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Fukushima U, Sasaki S, Okano S, Takase K, Hagio M. The comparison between the cerebral blood flow directly measures and cerebral blood flow velocity in the middle and basilar cerebral arteries measured by transcranial Doppler ultrasonography. J Vet Med Sci 1999; 61:1293-7. [PMID: 10651049 DOI: 10.1292/jvms.61.1293] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Transcranial Doppler ultrasonography (TCD) may be useful for determining alterations in cerebral blood flow (CBF) during excessive hemodynamic changes by non-invasive measurement of the CBF velocity. The purpose of this study was to measure the correlation between CBF and the middle cerebral artery (MCA) and basilar artery (BA) flow velocities, as measured by TCD during excessive hemodynamic changes produced by hypertension and hypotension in adult dogs. The peak, diastolic, and mean flow velocities were measured by TCD. Arterial hypertension was induced by administration of dopamine at 5 and 15 microg/kg/min, and hypotension was induced by hemorrhage. During the hemodynamic changes, the BA velocity correlated more closely with the alteration in the CBF than the MCA velocity. In terms of percentages of the values during anesthesia, there was good correlation between CBF and the MCA and BA velocities. In conclusion, our findings indicate that MCA and BA velocity measurements, as a percentage of the values during anesthesia, both give an equally accurate indication of alterations in CBF during excessive hemodynamic changes.
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Affiliation(s)
- U Fukushima
- Department of Small Animal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University, Aomori, Japan
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19
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Chiang CH, Hagio M, Okano S. Effects of respiratory cycle on pulmonary venous flow and cardiac cycle on pulmonary venous diameter of dogs: a transesophageal echocardiography study. J Vet Med Sci 1999; 61:155-8. [PMID: 10081754 DOI: 10.1292/jvms.61.155] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We investigated 12 anesthetized normal dogs using transesophageal echocardiography to understand the effects of respiration on the pulmonary venous flow. Additionally, we observed whether the diameter of the pulmonary vein changes with the heart beat. The pulsed Doppler wave form of pulmonary venous flow predominantly demonstrated two backward flows, with one peak occurring during ventricular systole and another during ventricular diastole. Sometimes a small forward flow occurred during left atrial contraction. In comparison with expiration, the peak velocity and velocity-time integral of the flow wave under inspiration occurred during both systole and diastole were significantly smaller. The diameter of the pulmonary vein decreased during left atrial contraction and increased during left ventricular systole and diastole.
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Affiliation(s)
- C H Chiang
- Department of Small Animal Medicine, Faculty of Veterinary Medicine and Animal Sciences, Kitasato University, Aomori, Japan
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20
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Chiang CH, Hagio M, Yoshida H, Okano S. Pulmonary venous flow in normal dogs recorded by transthoracic echocardiography: techniques, anatomic validations and flow characteristics. J Vet Med Sci 1998; 60:333-9. [PMID: 9560782 DOI: 10.1292/jvms.60.333] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
To observe pulmonary venous flow in dogs, the echocardiographic imaging planes and the techniques for examination, and the validations of anatomic location were investigated. Then, the velocity pattern of pulmonary venous flow was recorded in normal conscious dogs. Six imaging planes were available for observing the right or left caudal lobe pulmonary venous flow with two-dimensional or pulsed Doppler echocardiography. Of these, the left lateral apical 4-chamber view can be applied as standard view, because the pulmonary venous flow and transmitral flow could be recorded in this view simultaneously with small sampling angle. The velocity pattern of pulmonary venous flow demonstrated two forward waves in 19 of 20 dogs examined, with one peak occurring during ventricular systole and another during ventricular diastole. A reversed flow during atrial contraction was also seen in 11 dogs. In the two forward waves, the mean peak velocity and velocity-time integral of ventricular diastolic forward flow were significantly higher than those of systolic forward flow (46.49 +/- 6.79 vs. 31.13 +/- 4.92 cm/s, p < 0.0001 and 8.18 +/- 1.84 vs. 5.14 +/- 0.82 cm, p < 0.0001, respectively). The deceleration time of diastolic forward flow shortened with the increase of heart rate (r = -0.87, p < 0.0001). Pulmonary venous flow in dogs can be observed under transthoracic two-dimensional or pulsed Doppler echocardiography.
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Affiliation(s)
- C H Chiang
- Department of Small Animal Medicine, Faculty of Veterinary Medicine and Animal Sciences, Kitasato University, Aomori, Japan
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21
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Miyamoto T, Shirahama M, Kiryu C, Mwanza T, Okumura M, Hagio M, Fujinaga T. Comparison of systemic and renal hemodynamics measured by Doppler ultrasonography in canine experimental hypovolemia. J Vet Med Sci 1997; 59:347-52. [PMID: 9192355 DOI: 10.1292/jvms.59.347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The aim of this study was to examine renal hemodynamics at the hypovolemic and recovery phases in two different hypovolemic shock models using Doppler ultrasonography, and to compare this with systemic hemodynamics. In experiment 1, the hypovolemic phase was induced in 6 mongrel dogs by removing arterial blood at 30 ml/kg for 60 min. In the recovery phase, this blood was reinfused at 30 ml/kg over 60 min. In experiment 2, hypovolemia was induced in 12 beagle dogs by rapid blood removal until blood pressure decreased to 40 mmHg and was maintained at this pressure for 30 min. Six of the dogs were then infused with 20 ml/kg hydroxyethyl starch over 5 min, and the other 6 were infused with 60 ml/kg lactated Ringer's solution also over 5 min. Parameters for systemic and renal hemodynamics were measured by using a polygraph and the Doppler method, respectively. The decrease of diastolic blood flow, resulted in an increase of vessel resistance, and was detected in the hypovolemic kidney by the Doppler method. The rapid and large volume infusion of resuscitation fluids was effective for the recovery of both systemic circulation and renal blood flow, however this induced an increase of kidney vessel resistance, a result of the autoregulation mechanism of the kidney. The changes in these parameters at the main renal artery and interlobar artery were similar.
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Affiliation(s)
- T Miyamoto
- Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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22
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Mwanza T, Miyamoto T, Okumura M, Hagio M, Fujinaga T. Ultrasonography and angiographic examination of normal canine liver vessels. Jpn J Vet Res 1996; 44:179-88. [PMID: 8997879] [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] [Indexed: 02/03/2023]
Abstract
The aim of this study is to provide a description of the ultrasonographic and angiographic anatomy of the hepatic and portal veins in normal dogs. Knowledge of this anatomy is essential for the proper diagnosis and correction of hepatic vessel anomalies like portal systemic shunts. Cranial mesenteric portography was done in 10 adult mongrel dogs to visualize the portal vein and its branches while the hepatic veins were visualized using the transvenous retrograde angiography method. Longitudinal and transverse ultrasound scans of the liver were done in the same dogs in left and right lateral positions in order to determine the best positions for imaging the different liver vessels. The distribution pattern of the hepatic and portal veins could be demonstrated by both ultrasonography and contrast angiography. Hepatic arteries are not usually visualized ultrasonographically. Ultrasound provided dynamic information that could not be obtained by contrast radiography. Super imposition of all vessels in the angiographic studies made the description of the branches of the liver vessels difficult. The results of the present study suggest that both methods may provide important complementary information in the diagnosis and planning of surgical procedures for the correction of vessel anomalies in the canine liver.
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Affiliation(s)
- T Mwanza
- Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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23
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Miyamoto T, Fujinaga T, Yamashita K, Hagio M. Changes of serum cytokine activities and other parameters in dogs with experimentally induced endotoxic shock. Jpn J Vet Res 1996; 44:107-18. [PMID: 8870390] [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] [Indexed: 02/02/2023]
Abstract
To study the relationship of changes of cytokines in endotoxic shock, serum tumor necrosis factor (TNF), interleukin (IL)-1 and IL-6 like activities, together with physiologic and hemodynamic responses, were examined in dogs before and after intravenous administration of lipopolysaccharide (LPS) purified from Escherichia coli in a dose of 500 micrograms/kg of body weight. The blood endotoxin concentration increased significantly at 30 min after LPS administration, and maintained high levels for 24 hr. Red blood cell counts; hemoglobin concentration and hematocrit values increased at 30 min, and these high values persisted for 24 hr. The platelet count decreased significantly at 30 min, then showed a tendency to recover, but decreased again at 24 hr. Cardiac output, cardiac index and mean arterial pressure showed transient, significant decreases at 15 min, and then returned to the baseline levels by 24 hr. TNF-like activities increased at 30 min, while IL-1-like activities did so between 30 and 60 min. The former reached the maximal levels at 2 hr and the latter at 1.5 hr. Both activities were then hardly detectable from 6 to 24 hr. IL-6-like activities elevated at 1 hr with the peak at 1.5 hr, and remained high until 24 hr.
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Affiliation(s)
- T Miyamoto
- Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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24
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Miyamoto T, Hagio M, Mwanza T, Okumura M, Fujinaga T. Compression of spinal cord caused by spinal deformation in a cat. J Vet Med Sci 1995; 57:1101-3. [PMID: 8720057 DOI: 10.1292/jvms.57.1101] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
An 8-month-old cat with bilateral hindlimb paresis was admitted. Radiography revealed a curvature of the thoracic spine and a partial deformation of thoracolumbar vertebrae (dorsal extrusion of the cranial and caudal edges). Compression of the spinal cord (T9-L1 and L6-7) was found by myelography. Medicinal treatment did not yield the desired result. Hemilaminectomy and laminectomy were done to relieve pressure on the spinal cord leading to improved gait. It is, however, not clear whether this syndrome was primarily caused by metabolic or genetic factors.
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Affiliation(s)
- T Miyamoto
- Department of Veterinary Surgery, Hokkaido University, Sapporo, Japan
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25
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Satoh M, Fujinaga T, Okumura M, Hagio M. Sandwich enzyme-linked immunosorbent assay for quantitative measurement of serum amyloid A protein in horses. Am J Vet Res 1995; 56:1286-91. [PMID: 8928944] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
To measure the concentration of serum amyloid A (sAA) protein in horses, a sensitive and highly reproducible sandwich (ELISA) was established, using affinity purified SAA antibody. Results of the ELISA were found to have a high correlation (r = 0.95) with those of the single radial immunodiffusion test. Equine SAA concentration was measured by use of this ELISA. In clinically normal horses, the concentration of SAA was high immediately after birth to 2 weeks of age. After that, SAA concentration had periodic fluctuations in the range of approximately 1.0 to 30 micrograms/ml. Mean (+/- SD)) concentrations of SAA in foals (< or = 12 months old) and adult horses (> or = 18 months old) were 21.23 +/- 12.20 and 14.93 +/- 9.07 micrograms/ml, respectively. In mares during the perinatal period, SAA concentration remained stable within the reference range before parturition. It increased quickly after delivery, and reached a peak value of 101.29 +/- 98.82 micrograms/ml on postpartum day 3, then began to decrease, at postpartum week 2, to the reference range by the end of postpartum month 1. In horses with experimentally induced inflammation, SAA concentration increased quickly and reached approximately four- to 40-fold increase over the pretreatment value on day 1 and remained high on days 2 to 6 after treatment. It then returned to the baseline value by 2 to 4 weeks in association with disappearance of local signs of inflammation. The SAA concentration was high in most horses with clinical signs of inflammation. It was concluded from these data that this ELISA is sensitive and reliable for measuring SAA in horses.
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Affiliation(s)
- M Satoh
- Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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26
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Miyamoto T, Hagio M, Mwanza T, Kobayashi T, Okumura M, Fujinaga T. Quantitative measurement of canine renal arterial blood flow using Doppler ultrasonography. J Vet Med Sci 1995; 57:785-8. [PMID: 8519921 DOI: 10.1292/jvms.57.785] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The aim of this study was to estimate the accuracy of the quantitative measurement of renal blood flow using the non-invasive method, Doppler ultrasonography. First, we determined a method of approach to the renal artery in order to detect the rate and pattern of flow, using 8 adult beagles under general anesthesia. Secondly, we examined the renal arterial blood flow using the Doppler method and electromagnetic flowmeter using 7 mongrel dogs. A significant correlation (r = 0.879; p < 0.01) was found between two methods, though the Doppler system tended to indicate high values than the electromagnetic flowmeter. Our study suggests that the Doppler method is a useful non-invasive technique of measuring renal blood flow in the dog.
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Affiliation(s)
- T Miyamoto
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Hokkaido University, Japan
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27
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Abstract
A 9-month-old male Japanese Black calf with subcutaneous edema in mainly both limbs was investigated. Necropsy revealed about 20 l of ascites and severe edema in the large omentum, abomasal folds, conjunctiva and rectum. Only small internal iliac and hepatic lymph nodes were found. Histopathology revealed lymph node dysplasia showing excess trabecular formation, reticular cell proliferation, and obvious dilation of both afferent and efferent lymphatics. These findings suggest that disturbance of lymphatic flow with congenital lymph nodes dyspalsia or aplasia resulted in lymphedema in this calf.
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Affiliation(s)
- R Yamaguchi
- Department of Veterinary Pathology, Faculty of Agriculture, Miyazaki University, Japan
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28
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Takeda A, Okumura S, Miyamoto T, Hagio M, Fujinaga T. Comparison of extravascular lung water volume with radiographic findings in dogs with experimentally increased permeability pulmonary edema. J Vet Med Sci 1995; 57:481-5. [PMID: 7548401 DOI: 10.1292/jvms.57.481] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The relationship between extravascular lung water volume (ELWV) and chest radiographical findings was studied in general-anesthetized beagles. The dogs were experimentally injected with oleic acid to increase pulmonary vascular permeability. When the ELWV value in the dogs increased more than approximately 37% from the control value, their chest radiographs began to show signs of pulmonary edema. At this time, the chest X-ray density increased to 10% above the control level. PaO2 decreased, and PaCO2 increased after the administration of oleic acid. This clearly showed that the pulmonary gas exchange function was reduced following increasing ELWV. This comparison showed that probably the thermal-sodium double indicator dilution measurement of ELWV can detect slight hyperpermeability pulmonary edema that does not show on chest radiographs. The chest radiograph was therefore not suitable for the detection of slight pulmonary edema, because it did not show any changes in the early stages in hyperpermeability pulmonary edema.
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Affiliation(s)
- A Takeda
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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29
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Okumura S, Takeda A, Miyamoto T, Hagio M, Fujinaga T. Transmigration of fluid rapidly infused into dogs with renal blood vessels ligation and increased pulmonary capillary permeability. J Vet Med Sci 1995; 57:213-8. [PMID: 7492635 DOI: 10.1292/jvms.57.213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
To study the transmigration of fluid rapidly infused intravenously, lactated-Ringer's solution was infused at the rate of 90 ml/kg/hr for 30 min into generally anesthetized dogs. Four groups were made; group C with no fluid infusion as the control, group F with rapid fluid infusion only, group LF with renal blood vessels ligation and rapid fluid infusion, and group OF with increased pulmonary capillary permeability experimentally induced by oleic acid and rapid fluid infusion. The extravascular lung water volume (ELWV) was measured by the thermal-sodium double indicator dilution method, and the amounts of ascites and urine, and other clinical parameters were monitored before and after fluid infusion. The results show that in the dogs without increased pulmonary capillary permeability excessive fluid is mainly excreted as urine (group F) or transudates into the abdominal cavity (group LF). But in the dogs with increased pulmonary capillary permeability (group OF) excessive fluid easily and rapidly transudated into the pulmonary interstitium, resulting in pulmonary edema.
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Affiliation(s)
- S Okumura
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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30
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Yamashita K, Fujinaga T, Miyamoto T, Hagio M, Izumisawa Y, Kotani T. Canine acute phase response: relationship between serum cytokine activity and acute phase protein in dogs. J Vet Med Sci 1994; 56:487-92. [PMID: 7524694 DOI: 10.1292/jvms.56.487] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The changes in serum activity of interleukin (IL)-1, IL-6, and tumor necrosis factor (TNF) were studied in dogs with acute inflammation. Dogs with local inflammation induced by an intramuscular injection of turpentine oil showed clinically a typical progression in the inflammatory response, recovering on day 14 after the treatment. Serum concentrations of C-reactive protein (CRP) and alpha 1 acid glycoprotein (alpha 1AG) increased, and the albumin concentration decreased in all dogs during the acute phase response. These values each returned to the normal range from day 14 to 21. Serum IL-6-like activity was detected from 2 hr to day 6 after treatment. Serum TNF-like activity in the treatment group was detected at a low level from 3 to 24 hr after treatment, but there was no statistically significant difference compared with the control group. The temporal changes in serum IL-6 and TNF-like activities preceded those in serum concentrations of CRP, alpha 1 AG, and albumin. No dogs showed a detectable rise in serum IL-1-like activity after treatment.
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Affiliation(s)
- K Yamashita
- Department of Veterinary Surgery 1, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
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31
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Mizuno S, Fujinaga T, Hagio M. Role of lymphocytes in spontaneous regression of experimentally transplanted canine transmissible venereal sarcoma. J Vet Med Sci 1994; 56:15-20. [PMID: 8204742 DOI: 10.1292/jvms.56.15] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Sensitized peripheral blood lymphocytes (PBL) obtained from canine transmissible venereal sarcoma (CTVS)-regressed dogs were more cytotoxic against CTVS cells than non-sensitized PBL from untreated dogs. Cytotoxicity shown by sensitized PBL was inhibited significantly by the addition of anti-major histocompatibility complex (MHC) class II mouse monoclonal antibody as well as that of anti-dog thymocyte rabbit serum. The degree of cytotoxic activity shown by lymphokine activated killer (LAK) cells induced from non-sensitized or sensitized PBL was similar to that of the activity shown by sensitized PBL. These LAK activities were also prohibited by the addition of anti-dog thymocyte rabbit serum. Immunohistochemical examination demonstrated that MHC class II antigens were expressed on the surface membrane of CTVS cells and thymocyte antigens were detected on the surface of the tumor infiltrating lymphocytes. From the results mentioned above, lymphocytes which play a central role in tumor regression are considered to be T cells. These cells might recognize MHC class II antigens on the surface membrane of CTVS cells in tumor regression.
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Affiliation(s)
- S Mizuno
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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32
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Mizuno Y, Aida H, Hara H, Fujinaga T, Hagio M. Comparison of methods of cardiac output measurements determined by dye dilution, pulsed Doppler echocardiography and thermodilution in horses. J Vet Med Sci 1994; 56:1-5. [PMID: 8204732 DOI: 10.1292/jvms.56.1] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Cardiac output (CO) measurements by the three methods of dye dilution, pulsed Doppler echocardiography and thermodilution in horses under anesthetized conditions were compared. Although CO determined by the thermodilution method was slightly higher than those obtained by the other two methods, the measurements by all methods showed almost similar results. The coefficients of correlation between the dye dilution and thermodilution methods, the dye dilution and pulsed Doppler echocardiography methods, and the thermodilution and pulsed Doppler echocardiography methods were 0.87, 0.89, and 0.88, respectively (P < 0.01). These results indicate that pulsed Doppler echocardiography and thermodilution methods could be no less useful than the traditional dye dilution method for evaluating of CO in horses. The pulsed Doppler echocardiography method may offer some advantage over other two methods; it is non-invasive and enables continuous measurement of CO.
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Affiliation(s)
- Y Mizuno
- Equine Research Institute, Japan Racing Association, Tokyo
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33
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Yamashita K, Fujinaga T, Hagio M, Miyamoto T, Izumisawa Y, Kotani T. Bioassay for interleukin-1, interleukin-6, and tumor necrosis factor-like activities in canine sera. J Vet Med Sci 1994; 56:103-7. [PMID: 8204733 DOI: 10.1292/jvms.56.103] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
To measure interleukin (IL)-1, IL-6, and tumor necrosis factor (TNF)-like activities in canine serum, bioassays were conducted using human melanoma A375S1, IL-6 dependent murine hybridoma MH60.BSF2, and WEHI 164 murine sarcoma subclone 28-4. Clinically normal adult beagles were experimentally induced endotoxic shock by an intravenous injection of lipopolysaccharide or local inflammation by an intramuscular injection of turpentine oil. IL-1-like activity was detected in sera from dogs with endotoxic shock. IL-6 and TNF-like activities were detected in sera from both dogs with endotoxic shock and local inflammation. IL-1-like activity in sera from the dogs with endotoxic shock declined after dilution with either medium or serum obtained before treatment (pre-serum), but the IL-1-like activity was maintained to a greater extent in samples diluted with pre-serum compared to those diluted with medium. TNF-like activity declined equally after dilution with either medium or pre-serum. On the other hand, IL-6-like activity was inhibited at low dilution. It was, therefore, necessary to dilute the serum samples to 1:180 from dogs with endotoxic shock or 1:60 from dogs with local inflammation, in order to minimize the effect of inhibitory factors on IL-6-like activity. IL-6-like activity was neutralized by monoclonal antibody against murine IL-6 receptors. TNF-like activity was neutralized by anti-mouse TNF alpha rabbit serum. However IL-1-like activity was not neutralized by either anti-mouse or anti-human IL-1 rabbit serum.
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Affiliation(s)
- K Yamashita
- Department of Veterinary Surgery 1, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
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34
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Abstract
Proliferative activity of murine interleukin-2 (IL-2) dependent T cells (CTLL-2) was detected in the culture supernatant of canine peripheral blood lymphocytes (PBL) stimulated with phytohemagglutinin-P (PHA-P), and was defined as dog IL-2. The highest production of IL-2 was obtained under the conditions in which a PBL population of 2 x 10(6) cells/ml was stimulated with PHA-P at a concentration of 10 micrograms/ml at 38 degrees C for 48 hr. Dog IL-2 activity was significantly inhibited by heating at 65 degrees C, acidification under pH 4, alkalification over pH 10, and trypsin exposure. A peak of dog IL-2 activity was detected in the fraction with a molecular weight of approximately 31,000 by gel filtration. Long-term culture of canine lymphocytes was successful over 10 passages by using dog IL-2 with PHA-P-stimulation every 3 passages. The cultured cells mostly consisted of small- and medium-sized lymphocytes. These cells reacted to anti-dog thymocyte rabbit serum and anti-dog Thy-1 mouse monoclonal antibody. These cells were therefore considered to originate in T-lineage lymphocytes. Cytostasis of PBL from intact dogs reacting to canine transmissible venereal sarcoma cells was increased significantly when PBL was cultured for more than 30 days with homologous IL-2.
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Affiliation(s)
- S Mizuno
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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35
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Nunokawa Y, Fujinaga T, Taira T, Okumura M, Yamashita K, Tsunoda N, Hagio M. Evaluation of serum amyloid A protein as an acute-phase reactive protein in horses. J Vet Med Sci 1993; 55:1011-6. [PMID: 7509640 DOI: 10.1292/jvms.55.1011] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Serum amyloid A protein (SAA) was isolated from equine acute-phase serum by repeating Sephadex G-75 gel filtration 3 times. Quantitative measurement of equine SAA was performed by the single radial immunodiffusion technique with rabbit anti-equine SAA serum. In clinically normal horses, the SAA concentration remained relatively high from immediately after birth up to 1 week of age. After this the concentration showed periodic fluctiation in the range of approximately 13 to 30 micrograms/ml. The mean (+/- SD) concentration of SAA in foals (< or = 12 months old) and in adult horses (> or = 18 months old) was 19.37 +/- 9.41 and 21.53 +/- 9.81 micrograms/ml, respectively. In mares during the perinatal period, the SAA concentration remained stable and within the normal range for 4 months before parturition. After foaling, it increased quickly and reached a peak value of 136.78 +/- 56.74 micrograms/ml on day 3 postpartum, and then began to decrease at 2 weeks postpartum returning to within the normal range by 1 month postpartum. In horses with experimentally induced inflammation, the SAA concentration increased quickly, and reached the highest value, approximately 4 to 20 times higher than pre-treatment values, on day 2 after treatment. It then returned to the base line values within 10 days to 4 weeks, concurrent with the disappearance of local inflammatory signs. The SAA concentration was very high in most horses with clinical signs of inflammation. It was concluded from these data that equine SAA was a sensitive acute-phase reactive protein which increased in the early phase of various acute inflammations.
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Affiliation(s)
- Y Nunokawa
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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36
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Otonari S, Nakai M, Yamaguchi R, Hagio M, Nasu T. Five cases of cranial duplication in calf. J Vet Med Sci 1993; 55:493-5. [PMID: 8357930 DOI: 10.1292/jvms.55.493] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Five cases of cranial duplications in calves were morphologically reported. Each calf had a single body with duplicated heads that showed various degrees of fusion. The medial sides of individual heads were asymmetrically supplied by the branches of hemilateral common carotid or lingual artery. No marked differences in the development of the duplicated head in any of the calves were observed. Cleft palates were observed in all heads. The development and general structures of the organs in the head and neck regions appeared to depend on the degree of duplication of the cranial nerves.
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Affiliation(s)
- S Otonari
- Department of Veterinary Anatomy, Faculty of Agriculture, Miyazaki University, Japan
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Hagio M, Murakami T, Otsuka H. Double-inlet univentricular heart of left ventricular type in a calf: detection by two-dimensional and Doppler echocardiography. Nihon Juigaku Zasshi 1989; 51:1049-53. [PMID: 2607728 DOI: 10.1292/jvms1939.51.1049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Hagio M, Otsuka H. Pulsed Doppler echocardiography in normal dogs and calves and three cases of valvular regurgitation. Nihon Juigaku Zasshi 1987; 49:1113-25. [PMID: 3430920 DOI: 10.1292/jvms1939.49.1113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Hagio M, Murakami T, Otsuka H. Two-dimensional echocardiographic diagnosis of bovine congenital heart disease: echocardiographic and anatomic correlations. Nihon Juigaku Zasshi 1987; 49:883-94. [PMID: 3682526 DOI: 10.1292/jvms1939.49.883] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Hagio M, Koike T, Sakai T. Experimental studies in intestinal healing of the dog. III An end-to-end intestinal anastomosis using a decalcified bone tube. Jpn J Vet Res 1976; 24:25-30. [PMID: 787609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Koike T, Hagio M, Kudo T, Sakai T. Experimental studies in intestinal healing of the dog. II. Observation on end-to-end small intestinal anastomosis. Jpn J Vet Res 1976; 24:19-24. [PMID: 966405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Koike T, Hagio M, Yasui T, Morooka T, Sakai T. Experimental studies in intestinal healing of the dog. IV Observations on the various types of enterotomy. Jpn J Vet Res 1976; 24:31-6. [PMID: 787610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Hagio M. Studies of an end-to-end small intestinal anastomosis using a decalcified bone tube in dogs. Jpn J Vet Res 1975; 23:106. [PMID: 1104957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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