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Yamguchi T, Mori K, Kojima Y, Hasegawa T, Hirota J, Akashi M, Soutome S, Yoshimatsu M, Nobuhara H, Matsugu Y, Kato S, Shibuya Y, Kurita H, Yamada SI, Nakahara H. Efficacy of perioperative oral care management in the prevention of surgical complications in 503 patients after pancreaticoduodenectomy for resectable malignant tumor: A multicenter retrospective analysis using propensity score matching. Surgery 2024; 175:1128-1133. [PMID: 38061914 DOI: 10.1016/j.surg.2023.11.008] [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] [Received: 03/28/2023] [Revised: 11/02/2023] [Accepted: 11/07/2023] [Indexed: 03/17/2024]
Abstract
BACKGROUND Pancreaticoduodenectomy has been associated with a high mortality rate and significant postoperative morbidity. Recently, perioperative oral care management has been reported to be effective in preventing postoperative pneumonia and surgical site infection. In this study, we examined the effect of perioperative oral care management in reducing complications after pancreaticoduodenectomy, including surgical site infection. METHODS This retrospective multicenter study included 503 patients who underwent pancreaticoduodenectomy at 8 facilities between January 2014 and December 2016. Among these, 144 received perioperative oral management by dentists and dental hygienists (oral management group), whereas the remaining 359 did not (control group). The oral care management program included oral health instructions, removal of dental calculus, professional mechanical tooth cleaning, removal of tongue coating, denture cleaning, instructions for gargling, and tooth extraction. The participants were matched using propensity scores to reduce background bias. Various factors were examined for correlation with the development of complications. RESULTS The incidence of organ/space surgical site infection was significantly lower in the oral management group than in the control group (8.0% vs 19.6%, P = .005). Multivariable logistic regression analysis revealed that hypertension and lack of perioperative oral management were independent risk factors for organ/space surgical site infection. Lack of perioperative oral management had an odds ratio of 2.847 (95% confidence interval 1.335-6.071, P = .007). CONCLUSION Perioperative oral care management reduces the occurrence of surgical site infections after pancreaticoduodenectomy and should be recommended as a strategy to prevent infections in addition to antibiotic use.
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Affiliation(s)
- Taihei Yamguchi
- Department of Preventive Dentistry, Kagoshima University, Japan.
| | - Kazuyo Mori
- Division of Clinical Engineering, Kagoshima University Hospital, Japan
| | - Yuka Kojima
- Department of Dentistry and Oral Surgery, Kansai Medical University, Japan
| | - Takumi Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Japan
| | - Junya Hirota
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Japan
| | - Masaya Akashi
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Japan
| | - Sakiko Soutome
- Department of Oral Health, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | | | | | - Yasuhiro Matsugu
- Department of Gastroenterological, Breast and Transplant Surgery, Hiroshima Prefectural Hospital, Japan; Department of Clinical Nutrition, Hiroshima Prefectural Hospital, Japan
| | - Shinichiro Kato
- Department of Oral and Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Japan
| | - Yasuyuki Shibuya
- Department of Oral and Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Japan
| | - Hiroshi Kurita
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Japan
| | - Shin-Ichi Yamada
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Japan; Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Japan
| | - Hirokazu Nakahara
- Department Oral and Maxillofacial Surgery, Osaka Metrpolitan University Graduate School of Medicine, Japan
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Mineta K, Hirota J, Yamada K, Itoh T, Chen P, Iwakawa H, Takatsuka H, Nomoto Y, Ito M. MYB3R-mediated and cell cycle-dependent transcriptional regulation of a tobacco ortholog of SCARECROW-LIKE28 in synchronized cultures of BY-2 cells. Plant Biotechnol (Tokyo) 2023; 40:353-359. [PMID: 38434109 PMCID: PMC10905365 DOI: 10.5511/plantbiotechnology.23.0515a] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/15/2023] [Indexed: 03/05/2024]
Abstract
Although it is well known that hierarchical transcriptional networks are essential for various aspects of plant development and environmental response, little has been investigated about whether and how they also regulate the plant cell cycle. Recent studies on cell cycle regulation in Arabidopsis thaliana identified SCARECROW-LIKE28 (SCL28), a GRAS-type transcription factor, that constitutes a hierarchical transcriptional pathway comprised of MYB3R, SCL28 and SIAMESE-RELATED (SMR). In this pathway, MYB3R family proteins regulate the G2/M-specific transcription of the SCL28 gene, of which products, in turn, positively regulate the transcription of SMR genes encoding a group of plant-specific inhibitor proteins of cyclin-dependent kinases. However, this pathway with a role in cell cycle inhibition is solely demonstrated in A. thaliana, thus leaving open the question of whether and to what extent this pathway is evolutionarily conserved in plants. In this study, we conducted differential display RT-PCR on synchronized Nicotiana tabacum (tobacco) BY-2 cells and identified several M-phase-specific cDNA clones, one of which turned out to be a tobacco ortholog of SCL28 and was designated NtSCL28. We showed that NtSCL28 is expressed specifically during G2/M and early G1 in the synchronized cultures of BY-2 cells. NtSCL28 contains MYB3R-binding promoter elements, so-called mitosis-specific activator elements, and is upregulated by a hyperactive form of NtmybA2, one of the MYB3R proteins from tobacco. Our study indicated that a part of the hierarchical pathway identified in A. thaliana is equally operating in tobacco cells, suggesting the conservation of this pathway across different families in evolution of angiosperm.
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Affiliation(s)
- Keito Mineta
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Junya Hirota
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Kesuke Yamada
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Takashi Itoh
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Tokyo 113-0033, Japan
| | - Poyu Chen
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Hidekazu Iwakawa
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Hirotomo Takatsuka
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Yuji Nomoto
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Masaki Ito
- School of Biological Science and Technology, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
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Murakami A, Takeda D, Hirota J, Saito I, Amano-Iga R, Yatagai N, Arimoto S, Kakei Y, Akashi M, Hasegawa T. Relationship of Mitochondrial-Related Protein Expression with the Differentiation, Metastasis, and Poor Prognosis of Oral Squamous Cell Carcinoma. Cancers (Basel) 2023; 15:4071. [PMID: 37627097 PMCID: PMC10452162 DOI: 10.3390/cancers15164071] [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: 07/06/2023] [Revised: 08/09/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Mitochondrial dysfunction and respiratory function changes have been consistently associated with the initiation and progression of cancer. The purpose of this study was to retrospectively investigate the expression of mitochondrial tumor-suppressor and DNA-repair proteins in patients with oral squamous cell carcinoma (OSCC) and to evaluate the relationship between their expression and prognosis. We enrolled 197 patients with OSCC who underwent surgical resection between August 2013 and October 2018. Clinical, pathological, and epidemiological data were retrospectively collected from hospital records. The expression of peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α), mitochondrial transcription factor A, mitochondrial tumor suppressor gene 1, silent information regulator 3, and 8-hydroxyguanine DNA glycosylase was investigated using immunochemistry. The 3-year disease-specific survival (DSS) rates of patients showing positive expression of all selected proteins were significantly higher than those of patients showing a lack of expression. Multivariate analysis revealed that the expression of PGC-1α (hazard ratio, 4.684) and vascular invasion (hazard ratio, 5.690) can predict the DSS rate (p < 0.001). Low PGC-1α expression and vascular invasion are potential clinically effective predictors of the prognosis of OSCC.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Takumi Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan; (A.M.); (D.T.); (S.A.); (Y.K.); (M.A.)
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Hirota J, Hasegawa T, Inui A, Takeda D, Amano-Iga R, Yatagai N, Saito I, Arimoto S, Akashi M. Local application of a transcutaneous carbon dioxide paste prevents excessive scarring and promotes muscle regeneration in a bupivacaine-induced rat model of muscle injury. Int Wound J 2023; 20:1151-1159. [PMID: 36250918 PMCID: PMC10031219 DOI: 10.1111/iwj.13974] [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: 08/15/2022] [Revised: 09/20/2022] [Accepted: 09/27/2022] [Indexed: 11/29/2022] Open
Abstract
In postoperative patients with head and neck cancer, scar tissue formation may interfere with the healing process, resulting in incomplete functional recovery and a reduced quality of life. Percutaneous application of carbon dioxide (CO2 ) has been reported to improve hypoxia, stimulate angiogenesis, and promote fracture repair and muscle damage. However, gaseous CO2 cannot be applied to the head and neck regions. Previously, we developed a paste that holds non-gaseous CO2 in a carrier and can be administered transdermally. Here, we investigated whether this paste could prevent excessive scarring and promote muscle regeneration using a bupivacaine-induced rat model of muscle injury. Forty-eight Sprague Dawley rats were randomly assigned to either a control group or a CO2 group. Both groups underwent surgery to induce muscle injury, but the control group received no treatment, whereas the CO2 group received the CO2 paste daily after surgery. Then, samples of the experimental sites were taken on days 3, 7, 14, and 21 post-surgery to examine the following: (1) inflammatory (interleukin [IL]-1β, IL-6), and transforming growth factor (TGF)-β and myogenic (MyoD and myogenin) gene expression by polymerase chain reaction, (2) muscle regeneration with haematoxylin and eosin staining, and (3) MyoD and myogenin protein expression using immunohistochemical staining. Rats in the CO2 group showed higher MyoD and myogenin expression and lower IL-1β, IL-6, and TGF-β expression than the control rats. In addition, treated rats showed evidence of accelerated muscle regeneration. Our study demonstrated that the CO2 paste prevents excessive scarring and accelerates muscle regeneration. This action may be exerted through the induction of an artificial Bohr effect, which leads to the upregulation of MyoD and myogenin, and the downregulation of IL-1β, IL-6, and TGF-β. The paste is inexpensive and non-invasive. Thus, it may be the treatment of choice for patients with muscle damage.
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Affiliation(s)
- Junya Hirota
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takumi Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsuyuki Inui
- Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Daisuke Takeda
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Rika Amano-Iga
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Nanae Yatagai
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Izumi Saito
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Satomi Arimoto
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Masaya Akashi
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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5
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Koizumi H, Takeuchi K, Matsumoto K, Fukaya N, Sato K, Uchida M, Matsumoto S, Hamura S, Hirota J, Nakashige M, Choi JC. Direct Conversion of Low-Concentration CO 2 into N-Aryl and N-Alkyl Carbamic Acid Esters Using Tetramethyl Orthosilicate with Amidines as a CO 2 Capture Agent and a Catalyst. J Org Chem 2023; 88:5015-5024. [PMID: 36791400 DOI: 10.1021/acs.joc.2c02326] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Herein, we report the direct conversion of low-concentration CO2 (15 vol %), equivalent to the CO2 concentration in the exhaust gas from a thermal power station, into carbamic acid esters (CAEs), which are precursors for pharmaceuticals, agrochemicals, and isocyanates. The reaction was performed using Si(OMe)4 as a nonmetallic regenerable reagent and 1,8-diazabicyclo[5.4.0]undec-7-ene as a CO2 capture agent and catalyst. This reaction system does not require the addition of metal complex catalysts or metal salt additives and is therefore simpler than our previously reported reaction system involving Ti(OR)4 and a Zn(II) catalyst. A variety of N-aryl, N-alkyl, and bis CAEs (precursors of polyurethane raw materials) were obtained in moderate to high yields (45-77% for 6 examples, 84-89% for 7 examples). In addition, bis CAEs were successfully synthesized from simulated exhaust gas containing impurities such as SO2, NO2, and CO or on a gram scale. We believe that this method can eliminate the use of toxic phosgene as the raw material for isocyanate production and mitigate CO2 emissions.
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Affiliation(s)
- Hiroki Koizumi
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
| | - Katsuhiko Takeuchi
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
| | - Kazuhiro Matsumoto
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
| | - Norihisa Fukaya
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
| | - Kazuhiko Sato
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
| | - Masahito Uchida
- Tosoh Corporation, Advanced Materials Research Laboratory, 2743-1 Hayakawa, Ayase, Kanagawa 252-1123, Japan
| | - Seiji Matsumoto
- Tosoh Corporation, 3-8-2 Shiba, Minato-Ku, Tokyo 105-8623, Japan
| | - Satoshi Hamura
- Tosoh Corporation, 3-8-2 Shiba, Minato-Ku, Tokyo 105-8623, Japan
| | - Junya Hirota
- Tosoh Corporation, Technology Center, 4560 Kaiseicho, Shunan, Yamaguchi 746-8501, Japan
| | - Makoto Nakashige
- Tosoh Corporation, Technology Center, 4560 Kaiseicho, Shunan, Yamaguchi 746-8501, Japan
| | - Jun-Chul Choi
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Ibaraki, Japan
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6
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Sasaki Y, Hirota J, Konno J. The impact of the difference in total diameter of metastatic tumor as a prognostic factor for advanced gastric cancer treated with systemic chemotherapy. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.084] [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: 11/14/2022] Open
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7
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Varela JA, Montini N, Scully D, Van der Ploeg R, Oreb M, Boles E, Hirota J, Akada R, Hoshida H, Morrissey JP. Polymorphisms in the LAC12 gene explain lactose utilisation variability in Kluyveromyces marxianus strains. FEMS Yeast Res 2018; 17:3739724. [PMID: 28444380 DOI: 10.1093/femsyr/fox021] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 02/04/2017] [Accepted: 04/16/2017] [Indexed: 01/29/2023] Open
Abstract
Kluyveromyces marxianus is a safe yeast used in the food and biotechnology sectors. One of the important traits that sets it apart from the familiar yeasts, Saccharomyces cerevisiae, is its capacity to grow using lactose as a carbon source. Like in its close relative, Kluyveromyces lactis, this requires lactose transport via a permease and intracellular hydrolysis of the disaccharide. Given the importance of the trait, it was intriguing that most, but not all, strains of K. marxianus are reported to consume lactose efficiently. In this study, primarily through heterologous expression in S. cerevisiae and K. marxianus, it was established that a single gene, LAC12, is responsible for lactose uptake in K. marxianus. Strains that failed to transport lactose showed variation in 13 amino acids in the Lac12p protein, rendering the protein non-functional for lactose transport. Genome analysis showed that the LAC12 gene is present in four copies in the subtelomeric regions of three different chromosomes but only the ancestral LAC12 gene encodes a functional lactose transporter. Other copies of LAC12 may be non-functional or have alternative substrates. The analysis raises some interesting questions regarding the evolution of sugar transporters in K. marxianus.
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Affiliation(s)
- Javier A Varela
- School of Microbiology, University College Cork, Cork T12YN60, Ireland
| | - Noemi Montini
- School of Microbiology, University College Cork, Cork T12YN60, Ireland
| | - Damhan Scully
- School of Microbiology, University College Cork, Cork T12YN60, Ireland
| | | | - Mislav Oreb
- Institute of Molecular Biosciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Eckhard Boles
- Institute of Molecular Biosciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Junya Hirota
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube 755-8611, Japan
| | - Rinji Akada
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube 755-8611, Japan.,Biomedical Engineering Center, Yamaguchi University, Ube 755-8611, Japan.,Research Center for Thermotolerant Microbial Resources, Yamaguchi University, Yamaguchi 753-8315, Japan
| | - Hisashi Hoshida
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube 755-8611, Japan.,Biomedical Engineering Center, Yamaguchi University, Ube 755-8611, Japan.,Research Center for Thermotolerant Microbial Resources, Yamaguchi University, Yamaguchi 753-8315, Japan
| | - John P Morrissey
- School of Microbiology/Centre for Synthetic Biology and Biotechnology/Environmental Research Institute/APC Microbiome Institute, University College Cork, Cork T12 YN60, Ireland
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8
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Sasaki Y, Hirota J, Konno J. The impact of the difference in total diameter of metastatic tumor as a prognostic factor for advanced gastric cancer treated with systemic chemotherapy. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx660.019] [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: 11/14/2022] Open
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9
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Affiliation(s)
- M. Nakano
- Japan Atomic Energy Research Institute, Division of Reactor Engineering, Tokai-mura, Ibaraki-ken, Japan
| | - H. Tsunoda
- Tohoku University, Department of Nuclear Engineering, Aramaki, Sendai, Japan
| | - J. Hirota
- Japan Atomic Energy Research Institute, Division of Reactor Engineering, Tokai-mura, Ibaraki-ken, Japan
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10
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Asaoka T, Nakahara Y, Horikami K, Nishida T, Suzuki T, Taji Y, Miyasaka S, Hirota J. Application of Coarse-Mesh Rebalance Acceleration to Monte Carlo Eigenvalue Problems. NUCL SCI ENG 2017. [DOI: 10.13182/nse76-a26835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Asaoka
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - Y. Nakahara
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - K. Horikami
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - T. Nishida
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - T. Suzuki
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - Y. Taji
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - S. Miyasaka
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - J. Hirota
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
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11
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Varela JA, Montini N, Scully D, Van der Ploeg R, Oreb M, Boles E, Hirota J, Akada R, Hoshida H, Morrissey JP. Polymorphisms in the LAC12 gene explain lactose utilisation variability in Kluyveromyces marxianus strains. FEMS Yeast Res 2017. [DOI: 10.1093/femspd/fox021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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12
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Yoshida T, Shimizu Y, Hirota J, Ono Y, Nakagawa M, Ono S, Nakagawa S, Kato M, Asaka M. Complete disappearance of an esophagogastric polyp with concurrent early-stage adenocarcinoma after administration of a proton pump inhibitor. Endoscopy 2010; 42 Suppl 2:E176-7. [PMID: 20560121 DOI: 10.1055/s-0029-1243914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- T Yoshida
- Department of Gastroenterology, Hokkaido University Graduate School of Medicine, Hokkaido, Japan.
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13
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Yoshida T, Shimizu Y, Hirota J, Nakagawa M, Ono S, Oridate N, Kato M, Asaka M. Early-stage laryngeal squamous cell carcinoma of the epiglottis treated by endoscopic submucosal dissection. Endoscopy 2008; 40 Suppl 2:E204-5. [PMID: 18709620 DOI: 10.1055/s-2008-1077443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- T Yoshida
- Department of Gastroenterology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan.
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14
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Shinkuma S, Akiyama M, Torii-Saito N, Natsuga K, Tateishi Y, Ito K, Hirota J, Shimizu Y, Shichinohe T, Shimizu H. Pemphigus foliaceus associated with oesophageal cancer. J Eur Acad Dermatol Venereol 2008; 23:473-4. [PMID: 18721219 DOI: 10.1111/j.1468-3083.2008.02922.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Akiyama K, Hirota J, Tsuda Y, Ebishima H, Li C. Double primary cardiac tumors: possible association with a variety of cardiac diseases. J Cardiovasc Surg (Torino) 2006; 47:81-2. [PMID: 16434952] [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: 05/06/2023]
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16
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Kobayashi Y, Akiyama K, Hirota J, Taniyasu N, Yui M, Nakayama M. [Scimitar syndrome; report of a case]. Kyobu Geka 2004; 57:493-6. [PMID: 15202272] [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: 04/29/2023]
Abstract
A 17-year-old woman with scimitar syndrome without an atrial septal defect was operated by intra-cardiac conduit repair. Computed tomography (CT) and magnetic resonance imaging (MRI) showed resolution images of anatomical findings of scimitar vein. Surgical procedures for the scimitar syndrome have varied according to the anatomic features presented in each case. The detection of precise anatomy of scimitar syndrome is important for determining the appropriate surgical procedure. Images of 3-dimensional (3-D) CT and MRI of scimitar syndrome were demonstrated.
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Affiliation(s)
- Y Kobayashi
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki, Japan
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17
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Taniyasu N, Akiyama K, Hirota J, Iba Y. Newly developed left main coronary artery lesion after coronary stenting. J Cardiovasc Surg (Torino) 2002; 43:55-8. [PMID: 11803329] [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: 02/23/2023]
Abstract
Percutaneous transluminal coronary stenting is a proven nonoperative method of direct myocardial revascularization. We encountered a case of iatrogenic significant subacute left main coronary artery stenosis in a patient who had undergone prior percutaneous transluminal coronary artery stenting of the left anterior descending (LAD) artery. Coronary artery bypass grafting was performed. To our knowledge, this is the first report of a surgical case of left main coronary artery stenosis worsened by changes secondary to earlier coronary stenting in the mid portion of left descending coronary artery in Japan.
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Affiliation(s)
- N Taniyasu
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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Hirota J, Akiyama K, Taniyasu N, Iba Y. [A case of protruding atherosclerotic plaque with mobile projections in the sino-tubular junction]. Kyobu Geka 2001; 54:1059-61. [PMID: 11712379] [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: 02/22/2023]
Abstract
A 66-year-old woman who received maintenance hemodialysis for the last 14 years was referred to our hospital due to the sudden onset of ischemic stroke and systemic emboli. Transthoracic echocardiography before surgery showed large protruding masses measuring 2 cm which projected into the lumen of the aortic root. The plaque originated on a wide base of the posterior aspect of the ascending aorta at its junction with the sinus of Valsalva. The mobile plaque was surgically removed by endarterectomy from the posterior wall of sino-tubular junction under cardiopulmonary bypass. Pathologic examination of the masses removed at the time of surgery showed that they were atherosclerotic plaque with superimposed thrombi. During operation, transesophageal echocardiography appears to be useful for the rapid detection of a protruding aortic atheroma especially in the initial period of cardiopulmonary bypass until aortic cross clamp.
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Affiliation(s)
- J Hirota
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki, Japan
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19
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Akiyama K, Taniyasu N, Hirota J, Iba Y, Maisawa K. Recurrent aortic valve endocarditis caused by Gemella morbillorum--report of a case and review of the literature. Jpn Circ J 2001; 65:997-1000. [PMID: 11716255 DOI: 10.1253/jcj.65.997] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Gemella morbillorum (G. morbillorum) is part of the commensal flora of the oropharynx and intestinal tract, and on rare occasions causes infective endocarditis. A 55-year-old man with massive aortic regurgitation caused by recurrent infective endocarditis with G. morbillorum had a history of prior endocarditis caused by alpha-hemolytic streptococcus and multiple antibiotic allergies 5 years prior, and was successfully treated by aortic valve replacement. Almost all the reported cases of endocarditis caused by G. morbillorum have been bacteriologically cured with antibiotics and this is the first reported case of recurrent endocarditis caused by G. morbillorum in which the initial infection was bacteriologically cured by antibiotics and the secondary infection treated with valve replacement. This organism can be one of the causes of infective endocarditis and prompt surgical repair is mandatory if the infection is refractory or there is progression of congestive heart failure under antibiotic cover.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki City, Fukushima, Japan
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20
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Taniyasu N, Akiyama K, Iba Y, Hirota J. [Surgical treatment for aortic aneurysms associated with coronary artery disease-selection of bypass conduit]. Kyobu Geka 2001; 54:408-10. [PMID: 11357306] [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: 04/16/2023]
Abstract
Graft replacement for arch aneurysms and concomitant coronary artery bypass grafting (CABG) were performed in four consecutive patients over a three-year period between March 1995 and October 1998. The etiology of the aneurysms was atherosclerosis in all the patients. One early death as a result of a cerebellar infarction occurred on the 74th postoperative day. In all cases, respiratory failure frequently occurred after surgery. In a recent case, the internal mammary artery was used as a graft conduit to the left anterior descending artery (LAD). Both artery and vein grafts were anastomosed to coronary arteries during the initial core cooling. Selective cerebral perfusion was carried out during the reconstruction of the transverse aortic arch and its branches. The left subclavian artery was anastomosed first to secure perfusion to the LAD. To achieve sufficient myocardial protection and obtain good postoperative hemodynamics, CABG was simultaneously performed at the time of aortic aneurysm repair in cases complicated with coronary artery disease.
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Affiliation(s)
- N Taniyasu
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki, Japan
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21
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Akiyama K, Maeda T, Taniyasu N, Hirota J. An unusual popliteal entrapment in a patient with rheumatoid knee. J Cardiovasc Surg (Torino) 2001; 42:281-4. [PMID: 11292951] [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: 02/19/2023]
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22
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Taniyasu N, Akiyama K, Takazawa A, Hirota J. [Surgical treatment for chronic pulmonary thromboembolism in a patient with protein C deficiency]. Kyobu Geka 2001; 54:237-40. [PMID: 11244758] [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: 02/19/2023]
Abstract
Medical therapy for chronic pulmonary thromboembolism is limited, and surgical treatment has become more frequent recently. We have performed pulmonary thromboendarterectomy on a patient with chronic pulmonary thromboembolism accompanied by protein C deficiency. The patient was a woman aged 68 years who had protein C deficiency. The preoperative condition was New York Heart Association functional class IV. Hypoxemia, marked pulmonary hypertension, and low cardiac output were observed. After a median sternotomy, moderate hypothermia was induced using a cardiopulmonary bypass, and thromboendarterectomy in the pulmonary artery was performed. The arterial blood oxygen concentration improved, and the mean pulmonary pressure decreased. The cardiac output also increased, and New York Heart Association functional class improved to I. Pulmonary thromboendarterectomy under cardiopulmonary bypass was effective for chronic pulmonary thromboembolism accompanied by protein C deficiency.
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Affiliation(s)
- N Taniyasu
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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23
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Abstract
A patient with a thrombosed mechanical valve underwent valve re-replacement during which a tumor of the left ventricular outflow tract with the typical macroscopic and microscopic characteristics of a papillary fibroelastoma was successfully removed surgically. The 60-year-old woman had undergone isolated mitral valve replacement with a St Jude Medical 29-mm valve for mitral regurgitation 15 years ago. The present admission was for investigation of dyspnea on exertion. Two-dimensional transthoracic echocardiography demonstrated a posteroseptal, pedunculated mass, measuring 1.3x1.0 cm, in the outflow tract of the left ventricle, mild mitral regurgitation and slight aortic stenosis.
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Affiliation(s)
- N Taniyasu
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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24
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Abstract
This study was conducted to evaluate the release of nitroglycerin (NG) that has been absorbed into the central venous catheter. A 0.05% NG solution was infused through a central venous catheter and the flow rates were set at 1, 5, or 10 ml/h, given over 12, 24, or 48 h. The catheter was flushed with lactate Ringer solution after completion of the NG infusion. The elution of the lactate Ringer solution from the tip of the catheter was then collected and assayed for its NG concentration by high performance liquid chromatography (HPLC). A higher concentration of NG was released with a faster flow rate and a longer infusion. The high level of NG release continued during the first 20 min, and ranged from a minimum of 0.07 mg/ml to a maximum that exceeded 0.15 mg/ml. Subsequently, the NG concentration gradually declined, but low concentrations of 0.006-0.02 mg/ml were still maintained 360 min later. Thus, it is suggested that if a catheter such as the Swan-Ganz continues to be used after the completion of a NG infusion, certain pharmacological effects due to the absorption of NG into the catheter body should be expected for at least 60 min.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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25
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Akiyama K, Taniyasu N, Iba Y, Hirota J, Asano S. Sudden deterioration of aortic regurgitation due to rupture of a raphal cord on the conjoined cusp. Jpn Circ J 2000; 64:477-80. [PMID: 10875743 DOI: 10.1253/jcj.64.477] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A 57-year-old man was admitted to hospital for acute myocardial infarction associated with mild aortic regurgitation, which was successfully treated by intracoronary thrombolysis. Twenty-four days later, he suffered from another chest pain attack without any electrocardiographic ST-T changes. The coronary angiogram did not show any significant lesions, but the aortic root angiogram showed massive aortic regurgitation. Surgery revealed a bicuspid aortic valve with a conjoined cusp that had a fenestrated raphe torn away from the aortic wall and prolapsing into the left ventricle. The aortic valve was successfully replaced with a St Jude Medical mechanical valve prosthesis. The pathological significance of the intact raphal cord and the rupture remains an unsolved problem. This is the first reported case in which an increase of aortic regurgitation due to a ruptured raphal cord supporting the conjoined cusp was confirmed by a serial root angiogram.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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26
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Hirota J, Furuichi T, Mikoshiba K. Inositol 1,4,5-trisphosphate receptor type 1 is a substrate for caspase-3 and is cleaved during apoptosis in a caspase-3-dependent manner. J Biol Chem 1999; 274:34433-7. [PMID: 10567423 DOI: 10.1074/jbc.274.48.34433] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.2] [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: 11/06/2022] Open
Abstract
The inositol 1,4,5-trisphosphate (IP(3)) receptor (IP(3)R), an IP(3)-gated Ca(2+) channel located on intracellular Ca(2+) stores, modulates intracellular Ca(2+) signaling. During apoptosis of the human T-cell line, Jurkat cells, as induced by staurosporine or Fas ligation, IP(3)R type 1 (IP(3)R1) was found to be cleaved. IP(3)R1 degradation during apoptosis was inhibited by pretreatment of Jurkat cells with the caspase-3 (-like protease) inhibitor, Ac-DEVD-CHO, and the caspases inhibitor, z-VAD-CH(2)DCB but not by the caspase-1 (-like protease) inhibitor, Ac-YVAD-CHO, suggesting that IP(3)R1 was cleaved by a caspase-3 (-like) protease. The recombinant caspase-3 cleaved IP(3)R1 in vitro to produce a fragmentation pattern consistent with that seen in Jurkat cells undergoing apoptosis. N-terminal amino acid sequencing revealed that the major cleavage site is (1888)DEVD*(1892)R (mouse IP(3)R1), which involves consensus sequence for caspase-3 cleavage (DEVD). To determine whether IP(3)R1 is cleaved by caspase-3 or is proteolyzed in its absence by other caspases, we examined the cleavage of IP(3)R1 during apoptosis in the MCF-7 breast carcinoma cell line, which has genetically lost caspase-3. Tumor necrosis factor-alpha- or staurosporine-induced apoptosis in caspase-3-deficient MCF-7 cells failed to demonstrate cleavage of IP(3)R1. In contrast, MCF-7/Casp-3 cells stably expressing caspase-3 showed IP(3)R1 degradation upon apoptotic stimuli. Therefore IP(3)R1 is a newly identified caspase-3 substrate, and caspase-3 is essential for the cleavage of IP(3)R1 during apoptosis. This cleavage resulted in a decrease in the channel activity as IP(3)R1 was digested, indicating that caspase-3 inactivates IP(3)R1 channel functions.
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Affiliation(s)
- J Hirota
- Mikoshiba Calciosignal Net Project, Exploratory Research for Advanced Technology, Japan Science and Technology Corporation, 2-28-8 Honkomagome, Bunkyo-ku, Tokyo 113-0021, Japan.
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27
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Abstract
An unusual case of an inflammatory abdominal aortic aneurysm (IAAA) associated with coronary aneurysms and pathological fracture of the adjacent lumbar vertebrae. The associated coronary lesions in cases of IAAA are usually occlusions. In the present case, it was concluded that a possible cause of the coronary aneurysm was coronary arteritis and the etiology of the pathological fracture of the lumbar vertebrae was occlusion of the lumbar penetrating arteries due to vasculitis resulting in aseptic necrosis. Inflammatory AAA can be associated with aneurysms in addition to occlusive disease in systemic arteries. The preoperative evaluation of systemic arterial lesions and the function of systemic organs is essential.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki, Japan
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28
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Akiyama K, Takazawa A, Hirota J, Yamanishi H, Akazawa T, Maeda T. Bleeding through the fiber interstices of a knitted dacron graft 12 years after its implantation: report of a case. Surg Today 1999; 29:953-6. [PMID: 10489145 DOI: 10.1007/bf02482795] [Citation(s) in RCA: 3] [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: 11/25/2022]
Abstract
We present herein the case of a 65-year-old man who suddenly developed fresh perigraft bleeding into the space between a knitted Dacron bifurcated graft and the aneurysmal sac, 12 years after undergoing graft replacement. Intraoperative findings did not show Dacron fiber degeneration at the nonanastomotic sites or a pseudoaneurysm at the anastomotic site. Widened Dacron fiber interstices resulting from graft dilation without sufficient graft healing was thought to have caused delayed hemorrhage through the macroscopically intact graft material, followed by massive clot retention between the graft and the aneurysmal sac. This case report serves to demonstrate that careful long-term follow-up is essential for patients who have undergone vascular graft replacement.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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29
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Hirota J, Michikawa T, Natsume T, Furuichi T, Mikoshiba K. Calmodulin inhibits inositol 1,4,5-trisphosphate-induced calcium release through the purified and reconstituted inositol 1,4,5-trisphosphate receptor type 1. FEBS Lett 1999; 456:322-6. [PMID: 10456332 DOI: 10.1016/s0014-5793(99)00973-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [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: 11/24/2022]
Abstract
Our previous studies have demonstrated that calmodulin binds to IP3R type I (IP3R1) in a Ca2+ dependent manner, which suggests that calmodulin regulates the IP3R1 channel. In the present study, we investigated real-time kinetics of interactions between calmodulin and IP3R1 as well as effects of calmodulin on IP3-induced Ca2+ release by purified and reconstituted IP3R1. Kinetic analysis revealed that calmodulin binds to IP3R1 in a Ca2+ dependent manner and that both association and dissociation phase consist of two components with time constants of k(a) = 4.46 x 10(2) and > 10(4) M(-1) s(-1) k(d) = 1.44 x 10(-2) and 1.17 x 10(-1) s(-1). The apparent dissociation constant was calculated to be 27.3 microM. The IP3-induced Ca2+ release through the purified and reconstituted IP3R1 was inhibited by Ca2+/calmodulin, in a dose dependent manner. We interpret our findings to mean that calmodulin binds to IP3R1 in a Ca2+ dependent manner to exert inhibitory effect on IP3R channel activity. This event may be one of the mechanisms governing the negative feedback regulation of IP3-induced Ca2+ release by Ca2+.
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Affiliation(s)
- J Hirota
- Mikoshiba Calciosignal Net Project, Exploratory Research for Advanced Technology, Japan Science and Technology Corporation, Tokyo, Japan.
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30
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Michikawa T, Hirota J, Kawano S, Hiraoka M, Yamada M, Furuichi T, Mikoshiba K. Calmodulin mediates calcium-dependent inactivation of the cerebellar type 1 inositol 1,4,5-trisphosphate receptor. Neuron 1999; 23:799-808. [PMID: 10482245 DOI: 10.1016/s0896-6273(01)80037-4] [Citation(s) in RCA: 140] [Impact Index Per Article: 5.6] [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: 01/19/2023]
Abstract
The dependency of purified mouse cerebellar type 1 inositol 1,4,5-trisphosphate receptor (IP3R1)/Ca2+ channel function on cytoplasmic Ca2+ was examined. In contrast to the channels in crude systems, the purified IP3R1 reconstituted into planar lipid bilayers did not show the bell-shaped dependence on Ca2+. It was activated with increasing Ca2+ sublinearly without inhibition even up to 200 microM. The addition of calmodulin to the cytoplasmic side inhibited the channel at high Ca2+ concentrations. Calmodulin antagonists reversed the Ca2+-dependent inactivation of the native channels in cerebellar microsomes. These results indicate that the bell-shaped dependence on cytoplasmic Ca2+ is not an intrinsic property of the IP3R1, and the Ca2+-dependent inactivation is directly mediated by calmodulin.
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Affiliation(s)
- T Michikawa
- Department of Molecular Neurobiology, Institute of Medical Science, University of Tokyo, Japan.
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31
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Natsume T, Hirota J, Yoshikawa F, Furuichi T, Mikoshiba K. Real time analysis of interaction between inositol 1,4, 5-trisphosphate receptor type I and its ligand. Biochem Biophys Res Commun 1999; 260:527-33. [PMID: 10403801 DOI: 10.1006/bbrc.1999.0905] [Citation(s) in RCA: 14] [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: 11/22/2022]
Abstract
Inositol 1,4,5-trisphosphate (IP(3)) is an important second messenger that releases intracellular Ca(2+) by binding to its specific receptor, inositol 1,4,5-trisphosphate receptor (IP(3)R), in a wide range of cellular processes. We report here large-scale expression and purification of N-terminal 604 amino acids of IP(3)R type 1 (T604) expressed in E. coli, which contains the ligand binding domain. Surface plasmon resonance biosensor studies showed that purified T604 could bind to its ligands with binding specificity identical to that of full-length native IP(3)R type 1. Kinetic parameters of T604 for IP(3) consisted of a fast association rate constant (K(ass) = 1.2 x 10(6) M(-1) s(-1)) and a rapid dissociation rate constant (k(diss) = 1 s(-1)), and the equilibrium dissociation constant was determined to be 336 nM, at 150 mM NaCl and pH 7.4. However, association and dissociation patterns depended on the pH level and ionic strength. These results pave the way toward detail analysis of structure-function analysis of the ligand binding domain of IP(3)R type 1 for its ligands.
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Affiliation(s)
- T Natsume
- Calciosignal Net Project, Exploratory Research for Advanced Technology (ERATO) JST., c/o RIKEN Komagome Branch, 2-28-8, Honkomagome, Bunkyo-ku, 113-0021, Japan.
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32
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Akiyama K, Takazawa A, Hirota J, Yamanishi H, Akazawa T, Maeda T. A double bifurcated graft for abdominal aorta and bilateral iliac artery reconstruction. Surg Today 1999; 29:313-6. [PMID: 10211560 DOI: 10.1007/bf02483054] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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
Revascularization of the hypogastric artery often tends to be neglected in aortoiliac reconstructive surgery; however, its incomplete revascularization can result in unfavorable complications such as buttock claudication or necrosis, vascular impotence, and colonic ischemia. Multiple vascular lesions in the abdominal aorta and bilateral iliac arteries were reconstructed using a newly designed double bifurcated graft in five male patients. All five patients demonstrated excellent graft limb patency and postoperative improvement of the ankle-brachial pressure index without any clinical signs of ischemia in regions of the hypogastric artery. Thus, we conclude that an aggressive approach toward hypogastric circulation maintenance is essential in aortoiliac reconstructive surgery. By using this double bifurcated graft, rapid and safe revascularization of the bilateral hypogastric arteries concomitant with the external iliac or femoral arteries can be performed.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki City, Fukushima, Japan
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33
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Ohkado A, Shiina Y, Nakajima T, Ohsawa S, Hirota J, Kainuma Y, Akiyama K. Evaluation of effect and distribution of heparin administered in vascular reconstructive surgery. Panminerva Med 1999; 41:18-21. [PMID: 10230251] [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: 02/12/2023]
Abstract
BACKGROUND The aim of this study was to find out whether intravenously administered heparin is distributed equally not only proximal but also distal to the arterial occlusion level in vascular reconstructive surgery. METHODS Ten consecutive patients (7 men and 3 women) with an average age of 69.9 years (range, 51 to 76 years) who underwent graft replacement for aortic abdominal aneurysm from April to December 1994 were studied. Mean aortic clamp time was 76 minutes. Heparin sodium (100 U/kg) was administered intravenously to keep activated clotting time (ACT) over 250 secs and was neutralized by protamine sulfate (1 mg/kg) just after reperfusion. ACT, blood lactate and CPK-MM in the brachial and dorsal pedis artery were measured before heparin administration (control), just after arterial occlusion, just before reperfusion and 10 minutes after protamine administration. RESULTS ACT was significantly prolonged after arterial occlusion and recovered after protamine administration with no significant differences between proximal and distal values at each point. Lactate showed significant increase after arterial occlusion which was more remarkable distally. CPK-MM was all the way within the normal range. CONCLUSIONS In vascular reconstructive surgery which requires temporary arterial occlusion for as long as 80 minutes, the effect of heparin is excellent and equal throughout the body by collateral vessels, and the metabolic influence due to blockade of the blood flow is not so critical as to lead to cellular damage although anaerobic glycolysis is promoted distally due to hypoxia.
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Affiliation(s)
- A Ohkado
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Tokyo, Japan
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Akiyama K, Ohsawa S, Hirota J, Sasaki S, Takazawa A, Yamanishi H, Akazawa T. Cardiopulmonary bypass established via a sutured vascular graft in the presence of extraanatomic bypass. Surg Today 1999; 28:1329-32. [PMID: 9872563 DOI: 10.1007/bf02482829] [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: 11/29/2022]
Abstract
Cardiopulmonary bypass (CPB) was established via a sutured collagen sealed knitted Dacron graft in two patients who had undergone extraanatomic bypasses for lower limb ischemia, whose ascending aorta was not suitable for cannulation. One patient, with a history of femorofemoral bypass, underwent surgery for a ruptured aortic arch aneurysm (AAA) and the other patient, with a history of axillobifemoral bypass for chronic dissection involving the aortic arch and descending aorta, had unstable angina and underwent coronary artery bypass grafting. This technique of perfusion was found to be safe and effective for patients with an impaired ascending aorta who have undergone an extraanatomic bypass for the lower limb.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki City, Fukushima, Japan
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35
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Akiyama K, Takazawa A, Hirota J, Yamagishi H, Akazawa T. A case of ruptured descending thoracic aortic aneurysm into the right pleural cavity: importance of preoperative drainage of the right pleural cavity. J Cardiovasc Surg (Torino) 1998; 39:869-71. [PMID: 9972919] [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: 02/10/2023]
Abstract
We present an unusual case of a ruptured descending thoracic aortic aneurysm into the right pleural cavity of a patient with pectus carinatum. The presence of pectus carinatum played an important role in the development of the aneurysm at the atypical site and the rupture into the right pleural cavity. A small amount of right pleural bleeding on admission can increase and develop to massive hemothorax until emergency operation. Massive bleeding in the right pleural cavity where the dependent lung is located causes atelectasis and increased shunt fraction under one lung ventilation. Therefore, continuous drainage of the right pleural cavity is essential to prevent serious hypoxia during graft replacement in a case of ruptured descending thoracic aneurysm into the right hemithorax.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki City, Fukushima, Japan
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36
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Takazawa A, Akiyama K, Hirota J, Nagumo T, Sasaki S. [A successful repair of infective endocarditis accompanied by a pseudoaneurysm of the left ventricle]. Jpn J Thorac Cardiovasc Surg 1998; 46:939-42. [PMID: 9796302 DOI: 10.1007/bf03217850] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The present paper reports a successful surgical treatment of a 47-year-old male with a pseudoaneurysm of the left ventricle. The patient has also been administered Penicillin G for 5 months to treat endocarditis. Cardiac catheterization showed severe aortic stenosis and a pseudoaneurysm of the left ventricle which was dilating in systole. The patient underwent patch closure of the pseudoaneurysm whose ostium was situated at the miral-aortic inter valvular fibrosa followed by aortic valve replacement and direct closure of a right Valsalva sinus aneurysm. His postoperative course was uneventful. The patient had no recurrence of endocarditis nor malfunction of the prosthetic valve for one year postsurgery. This is the first report in Japan of successful surgical treatment of a pseudoaneurysm of the left ventricle due to perforation of the miral-aortic intervalvular fibrosa after endocarditis.
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Affiliation(s)
- A Takazawa
- Department of Cardiovascular Surgery, Iwaki Kyouritsu General Hospital, Fukushima, Japan
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37
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Akiyama K, Ohsawa S, Hirota J, Takiguchi M. Massive aortic regurgitation by spontaneous rupture of a fibrous strand in a fenestrated aortic valve. J Heart Valve Dis 1998; 7:521-3. [PMID: 9793850] [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: 02/09/2023]
Abstract
A very rare case of Marfan syndrome associated with acute aortic regurgitation due to rupture of a fibrous strand of a fenestrated aortic valve is presented. Although an aortic valve fenestration usually has no pathologic significance, its association with aortic annular dilatation plays an important role. Rupture of a myxomatously degenerated fibrous strand loaded with high tension from annular dilatation reducing the coaptation area of each cusp during diastole was the suspected cause of acute massive regurgitation by complete retroversion of the right coronary cusp. Rupture of a fibrous strand of a fenestrated aortic valve with a dilated annulus could result in acute massive aortic regurgitation, for which prompt surgical repair is mandatory.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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Kitamura M, Uwabe K, Hirota J, Kawai A, Endo M, Koyanagi H. Minimally invasive cardiac surgery in the adult: surgical instruments, equipment, and techniques. Artif Organs 1998; 22:765-8. [PMID: 9754462 DOI: 10.1046/j.1525-1594.1998.06227.x] [Citation(s) in RCA: 3] [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: 11/20/2022]
Abstract
To clarify the special instruments and equipment used for minimally invasive cardiac surgery (MICS), we examined the initial experiences with MICS operations with ministernotomy or minithoracotomy at our institution. Fifty adult patients with congenital, valvular, and/or ischemic heart diseases underwent MICS operations, and all surgical procedures were completed without conversion to full sternotomy. The length of the skin incision was about 10 cm or less in all patients. Postoperative recovery was favorable, and the majority of the patients were discharged from the hospital around the end of the second postoperative week. In this series of patients, an oscillating bone saw, lifting type retractor, 2 blade spreader, cannula with a balloon, and right-angled aortic clamp among other items, were very useful for successfully performing various operations with MICS approaches and techniques. The associated results suggest that MICS with ministernotomy or minithoracotomy was feasible using special instruments and equipment and could be encouraged for adult patients with various cardiovascular diseases.
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Affiliation(s)
- M Kitamura
- Department of Cardiovascular Surgery, The Heart Institute of Japan, Tokyo Women's Medical University
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Hirota J, Baba M, Matsumoto M, Furuichi T, Takatsu K, Mikoshiba K. T-cell-receptor signalling in inositol 1,4,5-trisphosphate receptor (IP3R) type-1-deficient mice: is IP3R type 1 essential for T-cell-receptor signalling? Biochem J 1998; 333 ( Pt 3):615-9. [PMID: 9677320 PMCID: PMC1219624 DOI: 10.1042/bj3330615] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [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: 11/17/2022]
Abstract
Stimulation of T-cells via the T-cell receptor (TCR) complex is accompanied by an increase in intracellular Ca2+ concentration ([Ca2+]i). Recently, it was reported that a stable transformant of the human T-cell line, Jurkat, expressing an antisense cDNA construct of inositol 1,4,5-trisphosphate receptor (IP3R) type 1 (IP3R1), failed to demonstrate increased [Ca2+]i or interleukin-2 production after TCR stimulation and was also resistant to apoptotic stimuli. This cell line lacked IP3R1 expression, but expressed the type-2 and -3 receptors, IP3R2 and IP3R3 respectively [Jayaraman, Ondriasova, Ondrias, Harnick and Marks (1995) Proc. Natl. Acad. Sci. U.S.A. 92, 6007-6011, and Jayaraman and Marks (1997) Mol. Cell. Biol. 17, 3005-3012]. The authors concluded that IP3R1 is essential for TCR signalling and suggested that Ca2+ release via IP3R1 is a critical mediator of apoptosis. To establish whether a loss of IP3R1 function in T-cells occurred in vivo and in vitro, we investigated Ca2+ signalling after TCR stimulation and the properties of T-cells using IP3R1-deficient (IP3R1-/-) mice. As IP3R1-/- mice die at weaning, we transplanted bone marrow cells of IP3R1-/- mice into irradiated wild-type mice. Western blot analysis showed that the recipient IP3R1-containing (IP3R1+/+) lymphocytes were replaced by the donor IP3R1-/- lymphocytes after transplantation and that expression of IP3R2 and IP3R3 was unaltered. In contrast with the previous reports, T-cells lacking IP3R1 were able to mobilize Ca2+ from intracellular Ca2+ stores after stimulation via the TCR. We observed no significant differences between IP3R1+/+ and IP3R1-/- T-cells in terms of the number of thymocytes and splenocytes, the proportion of the T-cell phenotype, proliferative response to anti-CD3 monoclonal antibody (mAb) stimulation and cell viability. Therefore IP3R1 is not essential for T-cell development and function.
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Affiliation(s)
- J Hirota
- Mikoshiba Calciosignal Net Project, Exploratory Research for Advanced Technology (ERATO), c/o Banyu Pharmaceutical Co., Ltd. 2-9-3 Shimomeguro, Meguro-ku, Tokyo 153, Japan.
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Akiyama K, Hirota J, Takiguchi M, Ohsawa S, Nagumo T, Sasaki S. Primary aortoenteric fistula with a chronic isolated abdominal aortic dissection: report of a case. Surg Today 1998; 28:441-5. [PMID: 9590717 DOI: 10.1007/s005950050161] [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: 02/07/2023]
Abstract
A 47-year-old woman on long-term hemodialysis due to a chronic isolated abdominal aortic dissection was admitted to our department with severe abdominal pain. She had not suffered any hematemesis or melena. An emergency laparotomy revealed an abdominal aortic aneurysm with a diameter of 60mm, densely adhered to the ileum. An aortoenteric fistula manifesting as intramural rupture into the ileum was found after infrarenal abdominal aortic and bilateral common iliac cross-clamping. The fistula on the ileac side was nontransmural, but that on the aortic side communicated with the pseudolumen of the abdominal aorta, and contained mural thrombus. The infrarenal abdominal aorta and bilateral common iliac arteries were replaced with a collagen-sealed woven Dacron bifurcated graft. Histological examination of the ileum in this portion showed intramural bleeding and xanthomatous granulation with foam cell infiltration in the thickened subserosa. While it is difficult to diagnose nonpenetrating aortoenteric fistula preoperatively, such a fistula must be considered in a patient with severe abdominal pain, for whom previous abdominal aortic surgery has been performed or when an abdominal aneurysm is observed. To our knowledge, no other case of an aortoenteric fistula presenting as an intramural rupture into the ileum in an isolated abdominal aortic dissection has ever been reported.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki City, Fukushima, Japan
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Akiyama K, Hirota J, Ohkado A, Shiina Y. Multivarious clinical manifestations of multiple pseudoaneurysms in Behçet's disease. J Cardiovasc Surg (Torino) 1998; 39:175-8. [PMID: 9639001] [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: 02/07/2023]
Abstract
In Behçet's disease, an aneurysm is prone to progress rapidly to a pseudoaneurysm. Acute limb ischemia due to acute thrombosis of a femoral pseudoaneurysm and subsequent Horner's syndrome due to another subclavian pseudoaneurysm are very rare but acceptable complications in Behçet's disease. We present a case of Behçet's disease with multiple pseudoaneurysms, which also showed these other clinical manifestations. Over a short time span, the patient rapidly developed left femoral and right subclavian pseudoaneurysms, which were successfully resected with graft replacements.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Iwaki City, Fukushima, Japan
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42
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Akiyama K, Hirota J, Ohkado A, Takazawa Y, Yamanishi H, Akazawa T. [Coronary artery bypass grafting to the left circumflex artery in the atrioventricular groove]. Kyobu Geka 1998; 51:365-9. [PMID: 9594493] [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: 02/07/2023]
Abstract
Coronary artery bypass graftings were performed to the left circumflex artery (LCX) system in the atrioventricular groove (#11 or #13) in addition to revascularization to the left anterior descending artery system using conventional technique in 10 patients with left main trunk lesion. Distal anastomosis was done at #11 of LCX in 6 patients using saphenous vein graft, and at #13 of LCX in 4 patients using 2 saphenous vein grafts and using 2 internal thoracic artery grafts. The mean flow rate of SVG operated by this technique showed larger values than that of SVGs by sequential bypass or individual bypass technique to #12 and/or #14 of LCX. Postoperative angiographies showed excellent graft patencies and symptomatic improvements were achieved. This technique of coronary artery revascularization is recommended and useful in patients whose #12 and #14 of LCX system is too small to make distal anastomosis.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Japan
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Furuichi T, Michikawa T, Yoshikawa F, Hirashima C, Mizuno H, Uchiyama T, Iwatsuki M, Inoue T, Hirota J, Hino M, Yamada M, Mikoshiba K. IP3 receptor — Structure, function and expression of the IP3-induced Ca2− release channel. Neurosci Res 1998. [DOI: 10.1016/s0168-0102(98)81593-9] [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: 10/27/2022]
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Hirota J, Akiyama K, Takazawa A, Hashimoto A, Sasaki S, Nagumo T. [A successful surgical treatment for huge left circumflex artery-right ventricle fistula using the fistula occlusion test]. Nihon Kyobu Geka Gakkai Zasshi 1997; 45:1782-6. [PMID: 9394597] [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: 02/05/2023]
Abstract
A surgical case of rare coronary artery fistula between the left circumflex artery and right ventricle was reported. A 46-year-old woman had suffered from exertional dyspnea and palpitation for three years. Pan systolic heart murmur was heard through the left 4th inter costal space. The chest X-ray film demonstrated cardiac enlargement and lung congestion, and the electrocardiograms showed atrial fibrillation and left ventricular hypertrophy when she was admitted to our hospital. Preoperative catheterization revealed a huge coronary artery fistula originating from the left circumflex artery and opening into the right ventricle through the posterior wall of the heart. The left-to-right shunt ratio was 60% and Qp/Qs was 2.47. At operation, the dilated circumflex artery fistula was carefully dissected and the tape was passed around the fistula as a tourniquet under extra corporeal circulation on the beating heart. To estimate myocardial ischemia, the fistula occlusion test was performed by tightening the previously placed tourniquet. Monitoring of electrocardiograms, transesophageal echocardiography, and hemodynamics were useful to detect myocardial ischemia. The occlusion test was performed under ECC for 5 minutes. No ischemic changes were observed. The fistula was interrupted under cardiac arrest at the point of the occlusion test.
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Affiliation(s)
- J Hirota
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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Hirota J, Akiyama K, Takiguchi M, Osawa S, Sasaki S, Nagumo T. [One stage operation for sternal turnover with preserved rectus muscle pedicles and aortic root replacement associated with Marfan's syndrome]. Nihon Kyobu Geka Gakkai Zasshi 1997; 45:1649-53. [PMID: 9341276] [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: 02/05/2023]
Abstract
A 40-year-old man with Marfan's syndrome had annulo aortic ectasia with Sellers grade 4 aortic valve regurgitation and Wada grade 3 pectus excavatum. Simultaneous operation was successfully performed by aortic valve composite graft insertion and sternal turnover with the rectus muscle pedicles. Following a midline skin incision, the cost-sterno complex (plastron) was dissected together with the bilateral rectus muscle pedicles, and the sternum was divided transversely through the second intercostal space. The plastron with muscle pedicles was retracted away from the anterior chest toward the abdomen and was covered by the moistened sternal bag made of polyethylene to prevent dryness and contamination during the composite graft insertion. The aortic root was replaced with a composite graft consisting of a 25 mm SJM valve and a 26 mm Hemashield graft. A short interposed 10 mm Hemashield graft was inserted between the ostia of the left coronary artery and the composite graft. The right coronary artery was reimplanted in the aortic conduit using the button technique with a doughnut pledget. This one stage method offered excellent operative exposure and enabled us to prevent possible necrosis of the sternum, infection of the mediastinal sinus, and postoperative cardiac failure resulting from chest wall compression. In this procedure, active usage of the rapid autologous transfusion system effectively reduced the total amount of blood transfusion.
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Affiliation(s)
- J Hirota
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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Akiyama K, Hirota J, Takiguchi M, Ohsawa S, Hashimoto A, Nagumo T, Sasaki S. [The leaflet fracture of a 19 mm SJM (HP) valve during valve insertion to the calcified small aortic annulus]. Kyobu Geka 1997; 50:562-4. [PMID: 9223862] [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: 02/04/2023]
Abstract
Aortic valve replacement was undergone in a 70-year-old woman with calcified aortic stenosis. Calcified and fused tricuspid aortic valve was excised and a 21 mm sizer passed with some difficulty through the annulus. A 19 mm SJM HP serious was selected and the horizontal mattress suturing technique was used. The valve was held at the cuff near the hinge guard and seated into the annulus by the usual amount of pressure, however, one leaflet fracture was retrieved and the valve was removed. A 19 mm standard SJM valve was then successfully implanted. The potential factors of leaflet fracture suggested that the leaflet thickness of smaller sized SJM valves showed smaller values than other bileaflet valves in the same sized-valves. In addition, the SJM valve does not have an orifice stiffening ring like other bileaflet valves. So, needless to say direct pressure to the leaflet, indirect pressure might cause valve destruction during insertion. The abnormal pressure applied to the direction from one hinge guard to the other can introduce deforming of the orifice ring resulting in leaflet fracture like this case. The pressure directed to the perpendicular direction may introduce leaflet escape due to the deforming of the valve orifice.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Japan
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Sameshima A, Ogawa K, Hirota J, Tokushige E, Ushikai M, Iwabuchi Y, Nishimoto K, Matsuzaki T, Hanamure Y, Fukuda K. [Reconstructive surgery for head and neck cancers under multiple facility cooperation system]. Nihon Jibiinkoka Gakkai Kaiho 1997; 100:444-8. [PMID: 9146017 DOI: 10.3950/jibiinkoka.100.444] [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] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The problems with the system for reconstructive surgery for head and neck cancers in our department where plastic surgeons are regularly invited from distant facilities were discussed. Especially, the importance of preoperative discussion between the plastic surgeons and ENT doctors was stressed. The computer system with Internet will play an important role in exchanging information such as CT scans and MRI scans between the plastic surgeons and ENT doctors. Moreover, the establishment of a system to prevent postoperative troubles such as closure of anastomosed vessels was stressed. Twenty-seven re-vascularized free flaps had been transferred with a 96.3% success rate (26 of 27 cases). We concluded that the system for reconstructive surgery under the multiple facility cooperation system worked well.
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Affiliation(s)
- A Sameshima
- Department of Otolaryngology, Prefectural Kanoya Hospital, Kagoshima
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Akiyama K, Hirota J, Shiina Y, Ohkado A, Ohsawa S, Kainuma Y. Thrombotic obstruction of a reinforced ringed expanded polytetrafluoroethylene graft caused by formation of a pseudoaneurysm at a nonanastomotic site: report of a case. Surg Today 1996; 26:936-9. [PMID: 8931230 DOI: 10.1007/bf00311801] [Citation(s) in RCA: 12] [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: 02/03/2023]
Abstract
We report herein the case of a 72-year-old man in whom a nonanastomotic pseudoaneurysm arose from a reinforced ringed expanded polytetrafluoroethylene (EPTFE) graft (Gore-Tex, Flagstaff, AZ, USA) following an axillobifemoral bypass. The pseudoaneurysm developed 2 years after graft insertion and induced graft thrombosis. The development of the pseudoaneurysm can be attributed to the fact that his axillobifemoral bypass graft was so short it deformed the proximal anastomosis, and the graft was subcutaneously tunneled onto the major pectoral muscle. These technical errors placed the graft under too much tension in the longitudinal direction, which resulted in graft disruption and pseudoaneurysmal formation, followed by thrombosis of the axillary artery. Moreover, the possibility of direct trauma at the time of insertion cannot be substantiated. Although the very poor compliance and design of the externally supported ring could not tolerate stretch deformity in the Gore-Tex graft, only one other case of a nonanastomotic pseudoaneurysm has ever been reported.
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Affiliation(s)
- K Akiyama
- Department of Cardiovascular Surgery, Iwaki Kyoritsu General Hospital, Fukushima, Japan
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Abstract
The telomere in the cat chromosome was detected by the fluorescence in situ hybridization method using all human telomere as a probe. In the metaphase chromosomes of cultured peripheral lymphocytes, telomere spots were observed in the terminal portions of the chromosomes. Although telomeres were confirmed in all chromosomes, the fluorescence intensity varied between the two homologues in some chromosomes.
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Affiliation(s)
- J Hirota
- Department of Legal Medicine and Human Genetics, Jichi Medical School, Tochigi, Japan
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Osaki T, Hirota J, Yoneda K, Yamamoto T, Ueta E. Clinical and histopathologic characteristics of tongue and gingiva carcinomas with occult and clinically evident cervical lymph-node metastasis. Int J Oral Maxillofac Surg 1996; 25:274-8. [PMID: 8910111 DOI: 10.1016/s0901-5027(06)80055-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Factors predisposing to occult metastasis were investigated in 66 tongue and 72 gingiva squamous cell carcinomas (SCCs). Occult metastasis was most frequently seen in tumors with grade 3 and occasionally in those with grade 4 invasion, no relation being shown with T-stage. When lymph-node metastases were analyzed with regard to tumor cell invasion mode and T-stage, T2 tumors with grade 3 invasion were mostly seen to give rise to occult metastasis, while grade 4 invasion was highly associated with N(+) metastasis in all T-stages. These results support the view that neck dissection should be recommended for tongue and gingiva SCCs exhibiting grade 3 invasion.
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Affiliation(s)
- T Osaki
- Department of Oral Surgery, Kochi Medical School, Japan
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