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Iqbal MA, Miyamoto K, Yumoto E, Oogai S, Mutanda I, Inafuku M, Oku H. Relationship between seasonal variation in isoprene emission and plant hormone profiles in the tropical plant Ficus septica. Plant Biol (Stuttg) 2023; 25:981-993. [PMID: 37565537 DOI: 10.1111/plb.13565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/19/2023] [Indexed: 08/12/2023]
Abstract
In Ficus septica, the short-term control of isoprene production and, therefore, isoprene emission has been linked to the hormone balance between auxin (IAA) and jasmonic acid (JA). However, the relationship between long-term changes in isoprene emission and that of plant hormones remains unknown. This study tracked isoprene emissions from F. septica leaves, plant hormone concentrations and signalling gene expression, MEP pathway metabolite concentrations, and related enzyme gene expression for 1 year in the field to better understand the role of plant hormones and their long-term control. Seasonality of isoprenes was mainly driven by temperature- and light-dependent variations in substrate availability through the MEP route, as well as transcriptional and post-transcriptional control of isoprene synthase (IspS). Isoprene emissions are seasonally correlated with plant hormone levels. This was especially evident in the cytokinin profiles, which decreased in summer and increased in winter. Only 4-hydroxy-3-methylbut-2-butenyl-4-diphosphate (HMBDP) exhibited a positive connection with cytokinins among the MEP metabolites examined, suggesting that HMBDP and its biosynthetic enzyme, HMBDP synthase (HDS), play a role in channelling of MEP pathway metabolites to cytokinin production. Thus, it is probable that cytokinins have potential feed-forward regulation of isoprene production. Under long-term natural conditions, the hormonal balance of IAA/JA-Ile was not associated with IspS transcripts or isoprene emissions. This study builds on prior work by revealing differences between short- and long-term hormonal modulation of isoprene emissions in the tropical tree F. septica.
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Affiliation(s)
- M A Iqbal
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - K Miyamoto
- Department of Biosciences, Teikyo University, Utsunomiya, Tochigi, Japan
| | - E Yumoto
- Advanced Instrumental Analysis Center, Teikyo University, Tochigi, Japan
| | - S Oogai
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
| | - I Mutanda
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - M Inafuku
- Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan
| | - H Oku
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
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2
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Susanti S, Kumoro A, Suzery M, Oku H. The effect of various sweeteners on the physical, chemical, and organoleptic
characteristics of ginger leaf extract syrup. Food Res 2023. [DOI: 10.26656/fr.2017.7(2).787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
The ginger leaf is an underutilized component of the ginger plant that contains antioxidant
chemicals in the form of terpenoids, phenols, and flavonoids, making it effective as a free
radical inhibitor. To improve the advantages of ginger leaves, it may be utilized as a food
supplement product in the form of syrup as an alternative in product development. The
purpose of this study was to determine the effect of sweeteners on the physical properties
(viscosity), chemical properties (pH, total phenol, and antioxidant activity), and
organoleptic properties of ginger leaf extract syrup (SEDJ), as well as the optimal type of
sweetener to generate the most favoured syrup. With five repeats, this study employed a
range of sweeteners, including T1 (sorbitol), T2 (sucrose), T3 (HFS), and T4 (honey). The
results revealed that sweetener usage in SEDJ had a significant influence (p<0.05) on the
pH, viscosity, and organoleptic properties of ginger leaf extract. Based on the highest level
of panellist preference, SEDJ with honey sweetener is the best treatment that is nutritious
as an antioxidant.
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3
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Iwamoto M, Aoki C, Ota M, Minami E, Yoshiyama A, Tanaka M, Sakane J, Ikari A, Tominaga T, Takai S, Oku H, Kimura K, Lee SW. P198 Identification of sentinel lymph nodes using the near infrared light camera system LIGHTVISION®. Breast 2023. [DOI: 10.1016/s0960-9776(23)00316-8] [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: 03/17/2023] Open
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4
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Murashita K, Takakuwa F, Matsunari H, Yoshinaga H, Yamamoto T, Oku H, Furuita H. Effect of oral administration of a single bolus of six different protein sources on digestive physiology of red seabream Pagrus major juveniles. Fish Physiol Biochem 2022; 48:939-954. [PMID: 35768739 DOI: 10.1007/s10695-022-01096-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
To reveal direct effects of various protein sources on digestive physiology of red seabream, Pagrus major (38.5 ± 0.4 g), six different protein sources of fishmeal (FM), soybean meal (SBM), corn gluten meal (CGM), soy protein concentrate (SPC), poultry by-product meal (PBM), and poultry-feather meal (PFM) were orally administered to fish (2 mg protein/g body weight) and sampled at 1.5 h and 3 h after administration. Gallbladder weight of fish administered FM, PBM, and PFM decreased after administration (p < 0.0001), while no difference was observed in the other ingredients compared to a non-protein sham control group, indicating that animal protein sources could more strongly stimulate bile secretion than plant protein sources in red seabream. Trypsin and chymotrypsin activity in the intestinal content markedly increased by the FM, SBM, and PFM administration (p < 0.0001). Lipase and amylase activity was also increased by FM and SBM but also by CGM for lipase and by PBM and PFM for amylase (p < 0.0001). These indicate that stimulation effect of the secretion of digestive enzymes is largely different among the protein sources. This might be due to the absorptive capacity of the protein source since intestinal absorption parameter genes (anpep, cpa, ggt1, and atp1a2) also increased by the FM, SBM, PBM or PFM (p < 0.05). In addition to the secretion levels of bile and digestive enzymes, gene expression levels of bile related genes (cyp7a1, cyp8b1, and shp) and digestion-regulating genes (casr and cck) were increased by the FM, SBM, PFM, and/or PBM administration, suggesting that animal proteins and SBM could be potent digestive stimulants compared to CGM and SPC. This study first revealed that single protein sources directly influence digestive enzyme secretion and bile secretion in fish. Information about the direct effect of each single source on digestive physiology could help to design feed formulation with less fishmeal.
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Affiliation(s)
- Koji Murashita
- Physiological Function Division, Aquaculture Research Department, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 224-1 Hiruda, Tamaki, Mie, 519-0423, Japan.
| | - Fumiaki Takakuwa
- Uragami Station, Aquaculture Research Institute, Kindai University, 468-3, Uragami, Nachi-Katsuura, Higashimuro, Wakayama, 649-5145, Japan
| | - Hiroyuki Matsunari
- Physiological Function Division, Aquaculture Research Department, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 224-1 Hiruda, Tamaki, Mie, 519-0423, Japan
| | - Hazuki Yoshinaga
- Physiological Function Division, Aquaculture Research Department, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 224-1 Hiruda, Tamaki, Mie, 519-0423, Japan
| | - Takeshi Yamamoto
- Physiological Function Division, Aquaculture Research Department, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 224-1 Hiruda, Tamaki, Mie, 519-0423, Japan
| | - Hiromi Oku
- Physiological Function Division, Aquaculture Research Department, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 224-1 Hiruda, Tamaki, Mie, 519-0423, Japan
| | - Hirofumi Furuita
- Physiological Function Division, Aquaculture Research Department, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 224-1 Hiruda, Tamaki, Mie, 519-0423, Japan
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Saitoh A, Shimoda K, Kawabata A, Oku H, Horiuchi S. Evaluation of the first Accelerated Bachelor of Science in Nursing program as a second career in Japan. Nurse Educ Today 2022; 111:105275. [PMID: 35144205 DOI: 10.1016/j.nedt.2022.105275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 01/09/2022] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND The first Accelerated Bachelor of Science in Nursing (ABSN) program with a two-year educational period in Japan was developed in a nursing university in Tokyo in 2017 (i.e., 2017-ABSN two-year program or designated as program 1) for individuals aiming to pursue nursing as a second career. It replaced program 2, the second-year bachelor's degree transfer program which is a three-year program implemented from 1997 to 2016. The original and currently on-going four-year undergraduate Bachelor of Science in Nursing (BSN) is designated as program 3. OBJECTIVE To evaluate the 2017-ABSN two-year program from learners' perspective. METHODS We used a case-control study design. As cases, the subjects were third-year bachelor's degree transfer students of program 1 at the nursing university in Tokyo. As controls, second-year bachelor's degree transfer students of program 2 and four-year undergraduate students of program 3 in the same university were given a questionnaire when they graduated. The survey items were grouped into five scales: (1) The education you are receiving, (2) Studying nursing, (3) Stress level, (4) The highest score on the national nursing examination practice test, and (5) The vocational commitment. The mean score of each item was calculated and comparisons were conducted using the Mann Whitney test. RESULTS Responses from 77 students (program 1), 23 students (program 2), and 133 students (program 3) were analyzed. The program 1 students had a significantly lower mean score on (1) The education you are receiving item "There is time for preparation and review" (p = 0.01). The program 1 students had a significantly lower score on (2) The studying nursing item "I can get the job (role) I want" (p = 0.01). The program 1 students had a significantly higher score on (4) The best score in the national nursing examination practice test (p = 0.01). CONCLUSION Shortening the academic period to two years in program 1 had no effect on the knowledge base of the students. However, the program 1 students had a significantly lower score in their identity as a nurse. It is often difficult to acquire a new nursing culture in a short period from a previous culture that has already been mastered. Educators need to fully understand the characteristics of learners and provide them with individualized and professional guidance to further improve their skills.
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Affiliation(s)
- Aya Saitoh
- Graduate School of Health Sciences, Faculty of Medicine, Niigata University, 2-746 Asahimachi-dori, Chuo-ku, Niigata 951-8518, Japan.
| | - Kana Shimoda
- Graduate School of Nursing Science, St. Luke's International University, 10-1 Akashi-cho, Chuo-ku, Tokyo 104-0044, Japan.
| | - Ai Kawabata
- Division of Nursing Science, Faculty of Medicine, Graduate School of Interdisciplinary Research, Yamanashi University, 1110 Shimokatou, Chuo-shi, Yamanashi, Japan.
| | - Hiromi Oku
- Graduate School of Nursing Science, St. Luke's International University, 10-1 Akashi-cho, Chuo-ku, Tokyo 104-0044, Japan.
| | - Shigeko Horiuchi
- Graduate School of Nursing Science, St. Luke's International University, 10-1 Akashi-cho, Chuo-ku, Tokyo 104-0044, Japan.
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Iqbal MA, Miyamoto K, Yumoto E, Parveen S, Mutanda I, Inafuku M, Oku H. Plant hormone profile and control over isoprene biosynthesis in a tropical tree Ficus septica. Plant Biol (Stuttg) 2022; 24:492-501. [PMID: 35050526 DOI: 10.1111/plb.13386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Plant hormone signalling and the circadian clock have been implicated in the transcriptional control of isoprene biosynthesis. To gain more insight into the hormonal control of isoprene biosynthesis, the present study measured plant hormone concentrations in jasmonic acid (JA)-treated leaves of our previous model study, examined their relationship with gene expression of isoprene synthase (IspS) and hormone signalling transcription factors. Of the plant hormones, IAA and JA-Ile and their related transcription factors (MYC2 and SAUR21) were significantly correlated with IspS gene expression. Concentrations of cytokinins, isopentenyladenine (iP), trans-zeatin riboside (tZR) and cis-zeatin riboside (cZR), were similarly significantly correlated with IspS expression. However, there was no significant correlation between their related transcription factor (ARR-B) and IspS expression. The circadian clock-related gene PRR7, but not the transcription factor LHY, was highly correlated with IspS expression. These results suggest that the hormonal balance between JA-Ile and IAA plays a central role in transcriptional regulation of IspS through the transcription factors MYC2 and SAUR21, the early auxin responsive genes. The putative cis-acting elements for SAUR on the IspS promoter (TGTCNN and CATATG), in addition to the G-box for MYC2, support the above proposal. These results provide insightful information on the core components of plant hormone-related regulation of IspS under coordination with the circadian clock genes.
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Affiliation(s)
- Md A Iqbal
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - K Miyamoto
- Department of Biosciences, Teikyo University, Utsunomiya, Tochigi, Japan
| | - E Yumoto
- Advanced Instrumental Analysis Center, Teikyo University, Tochigi, Japan
| | - S Parveen
- Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - I Mutanda
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, Jiangsu, China
| | - M Inafuku
- Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan
| | - H Oku
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan
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Yeo S, Kayama M, Toles M, Asahara K, D'Auria J, Havens D, Hayashi N, Horiuchi S, Kamei T, Kobayashi K, Kataoka Y, Miura Y, Montano NP, Oku H, Okubo N, Oyamada K, Sherwood G, Yoshida C, Yamada M. St. Luke's International University and University of North Carolina at Chapel Hill collaboration project to develop the first DNP program in Japan. J Prof Nurs 2021; 37:771-776. [PMID: 34187677 DOI: 10.1016/j.profnurs.2021.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Indexed: 11/20/2022]
Abstract
We report an international collaborative project to develop the first Doctor of Nursing Practice (DNP) program in Japan. We described the development and implementation of the first DNP program at the St. Luke's International University in Tokyo and the collaboration with the University of North Carolina at Chapel Hill in the United States. Faculty perceptions in both parties gradually evolved from the traditional perspective of international collaboration to the transitional and the beginning of the holistic partnership perspectives. The collaboration resulted in an innovative DNP program that directly addressed the gap between nursing education programs and Japan's clinical needs. The collaborative project cultivated a holistic international partnership. Rather than reporting a manual for international collaboration, we present our reflections and outcomes as narratives that others could use to achieve a holistic global partnership.
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Affiliation(s)
- SeonAe Yeo
- University of North Carolina at Chapel Hill School of Nursing, United States of America.
| | | | - Mark Toles
- University of North Carolina at Chapel Hill School of Nursing, United States of America
| | | | - Jennifer D'Auria
- University of North Carolina at Chapel Hill School of Nursing, United States of America
| | - Donna Havens
- Villanova University M. Louise Fitzpatrick College of Nursing, United States of America
| | | | | | | | | | | | | | | | - Hiromi Oku
- St. Luke's International University, Japan
| | | | | | - Gwen Sherwood
- University of North Carolina at Chapel Hill School of Nursing, United States of America
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Cotta Filho CK, Miranda FBG, Oku H, Machado GCC, Pereira Junior GA, Mazzo A. Cultura, ensino e aprendizagem da empatia na educação médica: scoping review. Interface (Botucatu) 2020. [DOI: 10.1590/interface.180567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Este estudo teve o objetivo de identificar, na literatura, como a empatia é influenciada pelos diferentes fatores culturais no contexto de ensino e aprendizagem em saúde. Realizado por meio de scoping review , conforme a proposta de Joanna Briggs Institute (JBI), a busca foi realizada nas bases de dados PubMed, Lilacs, Scopus e Web of Science e executada entre o período de dezembro de 2017 a janeiro de 2018. Observou-se, pelas pesquisas, que os estudantes ocidentais têm maior nível de empatia quando comparados aos estudantes orientais. Além disso, há diferença na empatia entre diferentes etnias, raças, sexo e religião. Sua avaliação dá-se por meio de diferentes instrumentos. Assim, entre os fatores que influenciam a empatia, identificou-se a cultura como sendo um deles. São necessários novos estudos a fim de compreender da melhor forma a empatia entre as diversas profissões da saúde.
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Affiliation(s)
| | | | - Hiromi Oku
- St. Luke’s International University, Japão
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Oku H, Kumamoto C, Miyagi T, Hiyane T, Nagata J, Chinen I. Serum-free culture of rat keratinocytes. In Vitro Cell Dev Biol Anim 2016; 30:496-503. [PMID: 27519864 DOI: 10.1007/bf02631322] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/1993] [Accepted: 12/16/1993] [Indexed: 11/30/2022]
Abstract
Procedures for the serum-free culture of rat keratinocytes have been established. Basal cells prepared from epidermis of newborn rat were stored in liquid nitrogen and used for primary culture. Among the available media, MCDB 153, developed originally for human keratinocyte (HK) culture, was the best for the development of serum-free formulation. To grow rat keratinocytes, bovine serum albumin was arbitrarily substituted for the macromolecule supplements needed for HK culture, i.e. fetal bovine serum protein or bovine pituitary extract. Qualitative and quantitative adjustment of supplements was thereafter made to support rapid cell growth. Satisfactory cell growth was achieved in the optimized medium of MCDB 153 supplemented with growth factors and amino acids: insulin (10 µg/ml), hydrocortisone (0.1 µg/ml), epidermal growth factor (25 ng/ml), calcium chloride (0.2 mM), histidine (0.23 mM), isoleucine (0.05 mM), tryptophane (0.015 mM), threonine (1.25 mM), tyrosine (0.031 mM), alanine (4.08 mM), and albumin (2 mg/ml). This optimized culture system was superior to the original HK culture condition for rapid growth of rat keratinocytes. Under our condition, cells grew as a monolayer, becoming confluent, but without stratification, and were passaged 2 to 3 times without any changes in morphology. The serum-free formulation allows us to control more accurately the concentrations of biomolecules in the medium including lipids and hormones, and therefore will be suitable for the study focusing on lipid metabolism or hormonal regulation of rat keratinocytes.
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Affiliation(s)
- H Oku
- Laboratory of Applied Biochemistry, Faculty of Agriculture, University of the Ryukyus, Nishihara-Cho, 903-01, Okinawa-Ken, Japan
| | - C Kumamoto
- Laboratory of Applied Biochemistry, Faculty of Agriculture, University of the Ryukyus, Nishihara-Cho, 903-01, Okinawa-Ken, Japan
| | - T Miyagi
- Laboratory of Applied Biochemistry, Faculty of Agriculture, University of the Ryukyus, Nishihara-Cho, 903-01, Okinawa-Ken, Japan
| | - T Hiyane
- Laboratory of Applied Biochemistry, Faculty of Agriculture, University of the Ryukyus, Nishihara-Cho, 903-01, Okinawa-Ken, Japan
| | - J Nagata
- Laboratory of Applied Biochemistry, Faculty of Agriculture, University of the Ryukyus, Nishihara-Cho, 903-01, Okinawa-Ken, Japan
| | - I Chinen
- Laboratory of Applied Biochemistry, Faculty of Agriculture, University of the Ryukyus, Nishihara-Cho, 903-01, Okinawa-Ken, Japan
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Murashita K, Matsunari H, Kumon K, Tanaka Y, Shiozawa S, Furuita H, Oku H, Yamamoto T. Characterization and ontogenetic development of digestive enzymes in Pacific bluefin tuna Thunnus orientalis larvae. Fish Physiol Biochem 2014; 40:1741-1755. [PMID: 25055726 DOI: 10.1007/s10695-014-9964-1] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 07/15/2014] [Indexed: 06/03/2023]
Abstract
The major digestive enzymes in Pacific bluefin tuna Thunnus orientalis larvae were characterized, and the physiological characteristics of the enzymes during early ontogeny were clarified using biochemical and molecular approaches. The maximum activity of trypsin (Try), chymotrypsin (Ct) and amylase (Amy) was observed at pH 6-11, 8-11 and 6-9, respectively. Maximum activity of Try, Ct and Amy occurred at 50 °C, that of lipase (Lip) was at 60 °C and that of pepsin (Pep) was at 40-50 °C. These pH and thermal profiles were similar to those for other fish species but differed from those previously reported for adult bluefin tuna. Enzyme activity for all enzymes assayed was found to decrease at high temperatures (Try, Ct, Amy and Pep: 50 °C; Lip: 40 °C), which is similar to findings for other fish species with one marked exception-increased Try activity was observed at 40 °C. Lip activity appeared to be dependent on bile salts under our assay conditions, resulting in a significant increase in activity in the presence of bile salts. Ontogenetic changes in pancreatic digestive enzymes showed similar gene expression patterns to those of other fish species, whereas marked temporal increases in enzyme activities were observed at 10-12 days post hatching (dph), coinciding with previously reported timing of the development of the pyloric caeca in bluefin tuna larvae. However, complete development of digestive function was indicated by the high pep gene expression from 19 dph, which contradicts the profile of Pep activity and previously reported development timing of the gastric gland. These findings contribute to the general knowledge of bluefin tuna larval digestive system development.
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Affiliation(s)
- Koji Murashita
- Aquaculture Systems Division, National Research Institute of Aquaculture, Fisheries Research Agency, 224-1, Hiruda, Tamaki, Mie, 519-0423, Japan,
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11
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Oku H, Tokuda M, Matsunari H, Furuita H, Murashita K, Yamamoto T. Characterization of differentially expressed genes in liver in response to the rearing temperature of rainbow trout Oncorhynchus mykiss and their heritable differences. Fish Physiol Biochem 2014; 40:1757-1769. [PMID: 25085589 DOI: 10.1007/s10695-014-9965-0] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 07/19/2014] [Indexed: 06/03/2023]
Abstract
To characterize thermal-responsive genes in fish, firstly, juvenile rainbow trout were reared in four different temperature conditions (average temperatures were 10, 14, 18, and 22 °C, respectively) and differentially expressed genes were identified. Gene expression in the liver was analyzed by the differential display method, followed by validation using real-time PCR. Subsequently, to examine whether the identified genes show heritable differences, the gene expression levels were compared among juveniles of three genetically distinct lines of rainbow trout (a strain and two closed colonies) by rearing at two different temperature conditions (average 14 and 22 °C). By rearing at 22 °C, growth retardation was observed compared with fish reared at 14 and 18 °C, and six genes were identified as differentially expressed genes in response to the rearing temperature in the gene expression analyses. With the increase in rearing temperature, gene expressions of a complement C1q and two ribosomal proteins were significantly up-regulated. On the other hand, three metabolic genes (betaine homocysteine methyltransferase, triosephosphate isomerase, and glucose-6-phosphatase) were down-regulated, indicating a metabolic depression due to high temperature. In the subsequent analyses, in response to the rearing temperature (14 and 22 °C), there was a trend that the complement C1q and glucose-6-phosphatase genes showed different expression patterns among the three rainbow trout lines, suggesting heritable differences in these genes. Our study provides information on thermal-responsive genes in fish, and we anticipate it will facilitate further investigation in the thermal biology of fish.
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Affiliation(s)
- Hiromi Oku
- National Research Institute of Aquaculture, Tamaki Station, Tamaki, Mie, 519-0423, Japan,
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12
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Suto T, Obata H, Tobe M, Oku H, Yokoo H, Nakazato Y, Saito S. Long-term effect of epidural injection with sustained-release lidocaine particles in a rat model of postoperative pain. Br J Anaesth 2012; 109:957-67. [DOI: 10.1093/bja/aes302] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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13
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Chien H, Matsumoto T, Saeki A, Oku H. Total Laparoscopi Retrograde Hysterectomy for Extensive Endomeriosis with Complete Obliteration of the Posterior Cul-de-Sac. J Minim Invasive Gynecol 2012. [DOI: 10.1016/j.jmig.2012.08.665] [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: 12/01/2022]
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14
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Oku H, Matsumoto T, Saeki A, Kawamata Y, Chien H, Onogi A, Ikuma K. Bottom-Up Suture in Laparoscopic Myomectomy. J Minim Invasive Gynecol 2011. [DOI: 10.1016/j.jmig.2011.08.318] [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: 10/17/2022]
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Oku H, Matsumoto T, Saeki A, Kawamata Y, Chien H, Oonogi A, Ikuma K. Fertility after Laparoscopically Assisted Segmental Bowel Resection for Rectal Endometoriosis. J Minim Invasive Gynecol 2011. [DOI: 10.1016/j.jmig.2011.08.611] [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: 11/29/2022]
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Hayouni EA, Miled K, Boubaker S, Bellasfar Z, Abedrabba M, Iwaski H, Oku H, Matsui T, Limam F, Hamdi M. Hydroalcoholic extract based-ointment from Punica granatum L. peels with enhanced in vivo healing potential on dermal wounds. Phytomedicine 2011; 18:976-984. [PMID: 21466954 DOI: 10.1016/j.phymed.2011.02.011] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 01/04/2011] [Accepted: 02/20/2011] [Indexed: 05/30/2023]
Abstract
The present study reports for the first time, the in vivo wound healing potential of Punica granatum L. peels. A 5% (w/w) methanolic extract based-ointment was formulated and evaluated for its wound healing in guinea pigs. The ointment was applied in vivo on the paravertebral area of twelve excised wounded models once a day for 10 consecutive days. The ointment significantly enhanced the wound contraction and the period of epithelialization as assessed by the mechanical (contraction rate, tensile strength), the biochemical (increasing of collagen, DNA and proteins synthesis) and the histopathological characteristics. Such investigation was encouraged by the efficiency of the methanolic extract as antimicrobial and antioxidant. Indeed, the extract showed antioxidant activity as strong as natural and synthetic compounds (Trolox, BHA, Quercetin). Furthermore, the extract exhibited significant antibacterial and antifungal activity against almost all tested bacteria: Pseudomonas aeruginosa ATCC 9027, Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Klebsiella pneumoniae, Salmonella anatum, Salmonella typhimurium, Streptococcus pneumoniae, and fungi Candida albicans, Candida glabrata, Trichopyton rubrum and Aspergillus niger. The formulated ointment might well find use as skin repair agent without hazard to human health based on these results and on the fact that it has been well established that the extracts of pomegranate used in conditions similar to those applied by traditional medicine, showed no toxic effects.
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Affiliation(s)
- E A Hayouni
- Laboratory of Bioactive Compounds at Biotechnology Center, Ecopark of Borj Cedria, BP-901, Hammam Lif 2050, Tunisia.
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Maruichi M, Oku H, Takai S, Muramatsu M, Sugiyama T, Imamura Y, Minami M, Ueki M, Satoh B, Sakaguchi M, Miyazaki M, Ikeda T. Measurement of activities in two different angiotensin II generating systems, chymase and angiotensin-converting enzyme, in the vitreous fluid of vitreoretinal diseases: A possible involvement of chymase in the pathogenesis of macular hole patients. Curr Eye Res 2009; 29:321-5. [PMID: 15590479 DOI: 10.1080/02713680490516161] [Citation(s) in RCA: 21] [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: 10/26/2022]
Abstract
PURPOSE To investigate possible involvement of chymase and angiotensin-converting enzyme (ACE) in the pathogenesis of vitreoretinal diseases, both of which are related to the production of angiotensin II. METHODS We measured chymase and ACE activities in the vitreous in the 54 affected eyes of 54 patients who had undergone vitreous surgery for idiopathic macular holes (MH, n = 14), proliferative diabetic retinopathy (PDR, n = 14), idiopathic epiretinal membranes (ERM, n = 13), and rhegmatogenous retinal detachment (RRD, n = 13). RESULTS Chymase activities in the vitreous from patients with MH, PDR, ERM, and RRD were 1.87 +/- 0.53, 0.06 +/- 0.04, 0.40 +/- 0.12, and 0.08 +/- 0.03 (mean +/- SE) mU/mg protein, respectively, and ACE activities in the vitreous humor were 0.18 +/- 0.09, 0.30 +/- 0.07, 0.01 +/- 0.01, and 0.03 +/- 0.02 (mean +/- SE) mU/mg protein, respectively. Chymase activity was significantly elevated in MH among these diseases (p < 0.01, Scheffe), and ACE was significantly activated in PDR compared to ERM and RRD (p < 0.05, Scheffe). CONCLUSIONS Our results suggest that two different angiotensin II generating systems are activated in human vitreous humor; an increased activity of chymase may play a possible role in the formation of macular holes.
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Affiliation(s)
- M Maruichi
- Department of Ophthalmology, Osaka Medical College, Osaka 569-8686, Japan
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Deguchi T, Hashiguchi T, Horinouchi S, Uto T, Oku H, Kimura K, Makisumi K, Arimura K. Serum VEGF increases in diabetic polyneuropathy, particularly in the neurologically active symptomatic stage. Diabet Med 2009; 26:247-52. [PMID: 19317819 DOI: 10.1111/j.1464-5491.2009.02680.x] [Citation(s) in RCA: 25] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AIM To identify the relationship between vascular endothelial growth factor (VEGF) and diabetic polyneuropathy (DPN). METHODS Two hundred and twenty diabetic patients participated, 113 with DPN and 107 without DPN. All patients were also classified according to the four stages of DPN (no neuropathy: stage 0; asymptomatic neuropathy: stage 1; symptomatic neuropathy: stage 2; disabling neuropathy: stage 3). Serum VEGF concentration was measured using an enzyme-linked immunosorbent assay (ELISA) and levels between the patients with and without DPN and also between the different stages of DPN, were compared. RESULTS The mean serum VEGF level in all patients was 264.6 +/- 218.8 pg/ml. The mean serum VEGF level was higher in patients with DPN (310.1 +/- 224.3 pg/ml) than in the patients without DPN (216.5 +/- 204.0 pg/ml, P = 0.0014). Serum VEGF was higher in the 'symptomatic' stage (stage 2, 364.8 +/- 225.9 pg/ml) in comparison with the 'asymptomatic' (stage 1, 256.7 +/- 224.4 pg/ml, P = 0.015) and 'disabling' (stage 3, 180.3 +/- 109.4 pg/ml, P = 0.042) stages. The mean serum VEGF level in patients with diabetic retinopathy (261.1 +/- 210.6 pg/ml) and in patients with diabetic nephropathy (241.5 +/- 185.7 pg/ml) was not increased. CONCLUSIONS The serum VEGF level is increased in patients with DPN, particularly in patients in the neurologically active 'symptomatic' stage.
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Affiliation(s)
- T Deguchi
- Department of Diabetes and Endocrine Medicine, Hematology, Endocrinology and Diabetology Center, Kagoshima University Medical and Dental Hospital, Kagoshima, Japan.
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Masuda Y, Oku H, Okumura T, Nomura K, Kurokawa T. Feeding restriction alters expression of some ATP related genes more sensitively than the RNA/DNA ratio in zebrafish, Danio rerio. Comp Biochem Physiol B Biochem Mol Biol 2008; 152:287-91. [PMID: 19135165 DOI: 10.1016/j.cbpb.2008.12.008] [Citation(s) in RCA: 15] [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] [Received: 10/08/2008] [Revised: 12/09/2008] [Accepted: 12/10/2008] [Indexed: 11/18/2022]
Abstract
The growth rate of fish shows extensive plasticity in response to various environments. Metabolic responses of fish to excessive nutritional shortages such as starvation have been reported, but the effects of moderate nutrient shortage remain unclear. We examined expression levels of some genes related to ATP metabolism and to myogenesis, the RNA/DNA ratio, and the protein/DNA ratio of fish under different feeding conditions: a diet of 212-432% (frequent feeding, FR) or 32-82% (restricted feeding, RE) of initial body weight per week was supplied. The expression levels of nucleoside diphosphate kinase (NDK)-Z2, glyceraldehyde 3-phosphate dehydrogenase (GAPDH), and myogenin genes of RE fish were higher than those of FR fish, although the RNA/DNA ratio and the protein/DNA ratio were unaffected by the feeding amount. Moreover, expression levels of NDK-Z2 and GAPDH were upregulated to a greater extent than those for myogenin and myostatin 1 under restricted feeding. Together, our results show that gene expression is more sensitive to nutrient conditions of fish than traditional indicators such as the RNA/DNA ratio. The ATP metabolic system is more sensitive to moderate nutrient shortages than the myogenic system.
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Yamada K, Oku H, Shinoda SS, Katakai R. Synthesis, crystal structure and molecular conformation of Nα-Boc-l-leucyl-(Z)-β-(3-pyridyl)-α,β- dehydroalanyl-l-leucine methyl ester*. ACTA ACUST UNITED AC 2008; 65:167-74. [PMID: 15705161 DOI: 10.1111/j.1399-3011.2005.00232.x] [Citation(s) in RCA: 3] [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
A protected tridehydropeptide containing (Z)-beta-(3-pyridyl)-alpha,beta-dehydroalanine (Delta(Z)3Pal) residue, Boc-Leu-Delta(Z)3Pal-Leu-OMe (1), was synthesized via Erlenmeyer azlactone method. X-ray crystallographic analysis revealed that the peptide 1 adopts an extended conformation, which is similar to that of a Delta(Z)Phe analog, Boc-Leu-Delta(Z)Phe-Leu-OMe (2).
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Affiliation(s)
- K Yamada
- Department of Chemistry, Gunma University, Tenjin-cho, Kiryu, Gunma, Japan
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Oku H, Saeki A, Kuno A, Tanase Y, Matsumoto T, Ikuma K. A Case of Successful Laparoscopic Treatment of Bladder Endometriosis. J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.061] [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: 11/28/2022]
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Ohsumi K, Hashimoto S, Hiura Y, Oku H, Fukuda A, Morimoto Y. Motile testicular sperm retrieved from nonobstructive azoospermic patients have the same competence to achieve fertilization and pregnancy as sperm retrieved from obstructive azoospermic patients. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.318] [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: 11/29/2022]
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Koseki M, Tsubakio-Yamamoto K, Yuasa-Kawase M, Oku H, Sandoval J, Masuda D, Matsuura F, Nishida M, Ishigami M, Hirano K, Hattori H, Shimomura I, Hori M, Yamashita S. EZETIMIBE MARKEDLY REDUCED SERUM PLANT STEROLS IN JAPANESE PATIENTS WITH SITOSTEROLEMIA. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70744-x] [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: 10/22/2022]
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Yamamoto K, Koseki M, Matsuura F, Oku H, Sandoval J, Kawase M, Masuda D, Nishida M, Ishigami M, Hirano K, Kihara S, Hori M, Shimomura I, Yamashita S. ADIPONECTIN ENHANCES APOA-1- AND HDL- MEDIATED CHOLESTEROL EFFLUX FROM HUMAN MONOCYTE-DERIVED MACROPHAGES. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70202-2] [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: 11/30/2022]
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Matsumoto T, Oku H, Ikuma K. 425: “Full Course” Endometriosis Surgery for Focal Adenomyosis with Severe Endometriosis. J Minim Invasive Gynecol 2007. [DOI: 10.1016/j.jmig.2007.08.474] [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: 10/22/2022]
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Tsuji Y, Hashimoto S, Murata Y, Oku H, Fukuda A, Morimoto Y. Retrospective analysis of sex-ratio of offspring derived from embryos cultured for 5 days. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.915] [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: 11/28/2022]
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Kawase M, Masuda D, Hirano K, Ikegami C, Oku H, Sandoval J, Yamamoto K, Takada M, Ishikawa Y, Kirino M, Koseki M, Matsuura F, Yamane M, Nishida M, Ishigami M, Shimomura I, Yamashita S. PO18-513 CD36 DEFICIENCY IS ASSOCIATED WITH PHENOTYPES OF THE METABOLIC SYNDROME AND ENHANCED ATHEROSCLEROTIC CARDIOVASCULAR DISEASES. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71523-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Masuda D, Hirano K, Tochino Y, Ikegami C, Oku H, Sandoval J, Kawase M, Yamamoto K, Koseki M, Matsuura F, Nishida M, Ishigami M, Shimomura I, Yamashita S. PO2-36 POSTPRANDIAL HYPERTRIGLYCERIDEMIA IN CD36 DEFICIENCY IS CAUSED BY AN ACCELERATED LIPOPROTEIN SYNTHESIS IN THE SMALL INTESTINES. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71046-2] [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: 11/29/2022]
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Inafuku M, Toda T, Okabe T, Shinjo A, Iwasaki H, Oku H. Expression of Cell-Cycle-Regulating Genes in the Development of Atherosclerosis in Japanese Quail (Coturnix japonica). Poult Sci 2007; 86:1166-73. [PMID: 17495088 DOI: 10.1093/ps/86.6.1166] [Citation(s) in RCA: 3] [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: 11/14/2022] Open
Abstract
The levels of mRNA expression in regulatory genes that are involved in the pathological changes of aortic atherosclerotic and fibroblastic intimal thickening was investigated in Japanese quail. The quail were divided into a control diet group and an atherogenic diet group. The quail were euthanized at 2, 4, 8, and 12 wk after consuming either a control diet or an atherogenic diet. Thereafter, both histological and immunohistochemical studies and mRNA expression analysis of the cell-cycle-regulating genes in aortic atherosclerotic lesions were performed on selected ascending aortas and their large branches. In the atherogenic diet group, aortic lipid-containing intimal and atheromatous lesions were seen mainly at 8 and 12 wk, respectively. Semiquantitative reverse-transcription PCR was used to analyze the alterations of mRNA expression on the development of atherosclerotic lesions. Messenger RNA expression of the c-fos and c-src genes showed peak levels at 8 wk in the atherogenic diet group. However, no significant alteration of c-jun mRNA expression was noted during the entire experimental period. According to the progression of aortic atherosclerotic lesions, c-myc mRNA expression in the atherogenic diet group increased chronologically, and the highest level was observed at 12 wk. Alterations in mRNA expression of proliferating cell nuclear antigen and the p27 gene were similar to that of c-myc. The levels of c-myc, proliferating cell nuclear antigen, and p27 mRNA expression was significantly correlated with the degree of aortic atherosclerotic lesion development at 12 wk in our experiment.
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Affiliation(s)
- M Inafuku
- United Graduate School of Agricultural Sciences, Kagoshima University, Korimoto, 890-0065, Japan
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Oku H, Koizumi N, Okumura T, Kobayashi T, Umino T. Molecular characterization of lipoprotein lipase, hepatic lipase and pancreatic lipase genes: Effects of fasting and refeeding on their gene expression in red sea bream Pagrus major. Comp Biochem Physiol B Biochem Mol Biol 2006; 145:168-78. [PMID: 16904358 DOI: 10.1016/j.cbpb.2006.06.008] [Citation(s) in RCA: 55] [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] [Received: 03/13/2006] [Revised: 06/22/2006] [Accepted: 06/22/2006] [Indexed: 10/24/2022]
Abstract
To investigate the nutritional regulation of lipid metabolism in fish, molecular characterization of lipases was conducted in red sea bream Pagrus major, and the effects of fasting and refeeding on their gene expression was examined. Together with data from a previous study, a total of four lipase genes were identified and characterized as lipoprotein lipase (LPL), hepatic lipase (HL) and pancreatic lipase (PL). These four lipase genes, termed LPL1, LPL2, HL and PL, share a high degree of similarity. LPL1 and LPL2 genes were expressed in various tissues including adipose tissue, gill, heart and hepatopancreas. HL gene was exclusively expressed in hepatopancreas. PL gene expression was detected in hepatopancreas and adipose tissue. Red sea bream LPL1 and LPL2 gene expression levels in hepatopancreas were increased during 48 h of fasting and decreased after refeeding, whereas no significant change in the expression levels of LPL1 and LPL2 was observed in adipose tissue, indicating that LPL1 and LPL2 gene expression is regulated in a tissue-specific manner in response to the nutritional state of fish. HL and PL gene expression was not affected by fasting and refeeding. The results of this study suggested that LPL, HL and PL gene expression is under different regulatory mechanisms in red sea bream with respect to the tissue-specificities and their nutritional regulation.
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Affiliation(s)
- Hiromi Oku
- National Research Institute of Aquaculture, Minami-ise, Mie, 516-0193, Japan.
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Hashimoto S, Murata Y, Kikkawa M, Sonoda M, Oku H, Murata T, Sugihara K, Nagata F, Nakaoka Y, Fukuda A, Morimoto Y. Successful delivery after the transfer of twice-vitrified embryos derived from in vitro matured oocytes: a case report. Hum Reprod 2006; 22:221-3. [PMID: 16966349 DOI: 10.1093/humrep/del354] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [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: 11/13/2022] Open
Abstract
We report here the first case of successful pregnancy and delivery after the blastocyst transfer of twice-vitrified embryos produced following in vitro maturation (IVM) and ICSI. The patient received 5000 IU hCG on day 12 of the treatment cycle, and oocyte retrieval was carried out 36 h after hCG injection. A total of 22 immature oocytes were obtained. Following incubation for 26 h in IVM medium, 15 oocytes (68.2%) reached metaphase II stage. In total, 13 oocytes (86.7%) were fertilized after ICSI with the husband's sperm, and 11 embryos at the pronuclear stage and two cleaved embryos on day 2 were vitrified because of thin endometrial thickness. Eight cryopreserved embryos at the pronuclear stage were warmed and cultured until the day 3 stage. Three embryos were transferred, and three embryos were twice vitrified. Unfortunately, these transferred embryos did not implant. Three twice-vitrified embryos were rewarmed and cultured until the day 5 stage, and two embryos were transferred. The second transfer attempt of twice-vitrified embryos resulted in the full-term delivery of a healthy infant. This case report demonstrates that twice-vitrified embryos, developed using an IVM protocol, retain the developmental competence for full-term, healthy infants.
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Affiliation(s)
- S Hashimoto
- IVF Namba Clinic, The Centre for Reproductive Medicine and Infertility, Osaka, Japan.
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Hama S, Hashimoto S, Murata Y, Oku H, Fukuda A, Morimoto Y. P-764. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.1150] [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: 11/17/2022]
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Yoshioka T, Hikita I, Asakawa M, Hirasawa T, Deguchi M, Matsutani T, Oku H, Horikawa T, Arimura A. Spontaneous scratching behaviour in DS-Nh mice as a possible model for pruritus in atopic dermatitis. Immunology 2006; 118:293-301. [PMID: 16827890 PMCID: PMC1782295 DOI: 10.1111/j.1365-2567.2006.02365.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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: 12/30/2022] Open
Abstract
Itching is one of the major clinical symptoms in atopic dermatitis (AD) and complicates the management of this pathological condition. An animal model of AD-like pruritus would contribute to a better understanding of AD and could lead to the development of safe and effective antipruritic agents. DS non-hair (DS-Nh) mice raised under conventional conditions spontaneously develop pruritus, which is associated with a dermatitis similar to human AD. There is a significant positive correlation between disease severity and the period of scratching behaviour in DS-Nh mice. In the present study, we found that levels of histamine and nerve growth factor (NGF) in serum and/or skin tissue were higher in DS-Nh mice with AD-like dermatitis than in age-matched mice without dermatitis. The histopathological data indicated that nerve fibres extend into and mast cells infiltrate the surrounding area of the skin lesion. NGF production by XB-2 cells, which was derived from mouse keratinocytes, was enhanced by histamine via the H1 receptor. We also found that prolonged treatment with an H1-antagonist was effective against pruritus through depression of the production of NGF, which is thought to be generated by keratinocytes. We conclude that DS-Nh mice can serve as a suitable model for gaining a better understanding of pruritus in AD, and that prolonged treatment with an H1-antagonist may be beneficial in patients with AD-associated pruritus.
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Affiliation(s)
- T Yoshioka
- Shionogi Discovery Research Laboratories, Shionogi & Co., Ltd, Osaka, Japan.
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Oku H, Tokuda M, Okumura T, Umino T. Effects of insulin, triiodothyronine and fat soluble vitamins on adipocyte differentiation and LPL gene expression in the stromal-vascular cells of red sea bream, Pagrus major. Comp Biochem Physiol B Biochem Mol Biol 2006; 144:326-33. [PMID: 16716627 DOI: 10.1016/j.cbpb.2006.03.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2005] [Revised: 03/22/2006] [Accepted: 03/23/2006] [Indexed: 11/20/2022]
Abstract
Various kinds of hormones including insulin, triiodothyronine (T(3)) and fat-soluble vitamins have been proposed as mediators of adipocyte differentiation in mammals. To investigate the factors which are responsible for fish adipocyte differentiation, we developed a serum-free culture system of stromal-vascular cells of red sea bream adipose tissue and examined the effects of bovine insulin, T(3), and fat-soluble vitamins (all-trans retinoic acid, retinyl acetate and 1,25-dihydroxyvitamin D(3)) on the differentiation-linked expression of the lipoprotein lipase (LPL) gene. As assessed by the increase in LPL gene expression after 3 day cultivation, like in mammalian adipocytes, insulin enhanced the adipocyte differentiation in a concentration-dependent manner. During 2 week cultivation, bovine insulin promoted lipid accumulation in differentiating adipocytes concentration-dependently until the terminal differentiation. These results indicate that the differentiation of fish adipocytes is inducible by insulin alone. T(3) alone had no effect but enhanced the differentiation-linked LPL gene expression in the presence of insulin. Fat-soluble vitamins, unlike in mammalian adipocytes, did not show any significant effects. The method developed in this study should be of interest for the characterization of factors involved in fish adipocyte differentiation.
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Affiliation(s)
- Hiromi Oku
- National Research Institute of Aquaculture, Minami-ise, Mie, 516-0193, Japan.
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Murata Y, Oku H, Nakaoka Y, Fukuda A, Morimoto Y. AC-019 Early follicle development in flare-up stimulation protocol yields poor clinical results that may be attributable to insufficient uterine receptivity. Reprod Biomed Online 2006. [DOI: 10.1016/s1472-6483(11)60467-7] [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: 11/28/2022]
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Murata Y, Oku H, Hashimoto S, Tokuda M, Fukuda A, Morimoto Y. The Frozen-Thawed Programs Rescue the Implantation of Day 6 Blastocysts. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.087] [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: 10/25/2022]
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Yamada K, Urakawa H, Oku H, Katakai R. Facile synthesis of Nalpha-protected-L-alpha,gamma-diaminobutyric acids mediated by polymer-supported hypervalent iodine reagent in water. ACTA ACUST UNITED AC 2005; 64:43-50. [PMID: 15251030 DOI: 10.1111/j.1399-3011.2004.00165.x] [Citation(s) in RCA: 12] [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: 11/30/2022]
Abstract
Hofmann rearrangement of Nalpha-Boc-L-Gln-OH mediated by a polymer-supported hypervalent iodine reagent poly[(4-diacetoxyiodo)styrene] (PSDIB) in water afforded Nalpha-Boc-L-alpha,gamma-diaminobutyric acid (Boc-Dab-OH, 1) in 87% yield. Nalpha-Z-derivative (Z-Dab-OH, 2) was prepared with PSDIB in 83% yield. Since the reaction of Nalpha-Fmoc-Gln-OH by this procedure did not proceed because of the insolubility of Fmoc-Gln-OH in aqueous media, we synthesized Fmoc-Dab(Boc)-OH (5) from 2 in 54% yield. Polymyxin B heptapeptide (PMBH) which contains four Dab residues was successfully synthesized in a solution-phase synthesis.
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Affiliation(s)
- K Yamada
- Department of Chemistry, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan
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Abstract
PURPOSE To investigate control mechanisms for ocular blood flow changes after dynamic exercise using two different methods. METHODS Changes over time in the tissue blood flow in the retina and choroid-retina of healthy volunteers were determined after dynamic exercise (Master's double two-step test), using scanning laser Doppler flowmetry (SLDF) and laser speckle flowgraphy (LSFG). Changes in intraocular pressure (IOP), blood pressure, plasma CO(2) gas concentration (pCO(2)), and levels of nitric oxide (NO) metabolites were examined. RESULTS Retinal blood flow measured by SLDF increased significantly only at 15 min after exercise. In contrast, normalized blur (NB) values in the choroid-retina, obtained by LSFG, increased significantly up to 60 min after exercise. Ocular perfusion pressure (OPP), calculated from IOP and blood pressure, increased significantly immediately and 15 min after exercise. The plasma NO metabolite levels increased significantly, although pCO(2) levels were unchanged. CONCLUSIONS Dynamic exercise changes OPP and produces increased tissue blood flow in the retina in the immediate postexercise period, while blood flow increases more persistently in the choroid-retina. Difference in control of blood flow in these two regions may be related to stronger autoregulatory mechanism of blood flow in the retina. Nitric oxide may play a role in the regulation of blood flow.
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Affiliation(s)
- T Okuno
- Department of Ophthalmology, Osaka Medical College, Takatsuki, Osaka, Japan
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40
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Kakugawa T, Mukae H, Hayashi T, Ishii H, Abe K, Fujii T, Oku H, Miyazaki M, Kadota J, Kohno S. Pirfenidone attenuates expression of HSP47 in murine bleomycin-induced pulmonary fibrosis. Eur Respir J 2005; 24:57-65. [PMID: 15293605 DOI: 10.1183/09031936.04.00120803] [Citation(s) in RCA: 127] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Heat shock protein (HSP) 47, a collagen-specific molecular chaperone, is involved in the processing and/or secretion of procollagen. The present study was undertaken to investigate whether treatment with the antifibrotic drug pirfenidone attenuates the bleomycin (BL)-induced overexpression of HSP47 in the lungs. Male ICR mice were intravenously injected with BL or saline (SA). Pirfenidone or control drug (CD) was administered 14 days after commencement of BL or SA, and continued throughout the course of the experiment. The mice were randomly divided into three experimental groups: 1) SA-treated with CD (SA group); 2) BL-treated with CD (BL group); and 3) BL-treated with pirfenidone (pirfenidone group). Lungs of the pirfenidone group showed a marked reduction of fibrotic lesions compared with the corresponding BL group. Immunohistochemical studies showed that BL treatment significantly increased the number of macrophages, myofibroblasts, HSP47-positive type II pneumocytes and HSP47-positive interstitial spindle-shaped cells. Treatment with pirfenidone significantly reduced the number of these cells compared with the corresponding BL group. Furthermore, treatment with pirfenidone significantly suppressed the BL-induced increase of the positive ratio of HSP47 and alpha-smooth muscle actin to interstitial spindle-shaped cells. The present study results showed that pirfenidone inhibited heat shock protein 47-positive cells and myofibroblasts, the principal cells responsible for the accumulation and deposition of extracellular matrix seen in pulmonary fibrosis.
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Affiliation(s)
- T Kakugawa
- Second Dept of Internal Medicine, Nagasaki University School of Medicine, Japan
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41
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Kanaya H, Fukuda A, Oku H, Nagata F, Nakaoka Y, Morimoto Y. In vitro maturation of immature oocytes in the culture media supplemented with patient’s serum compared to the media with follicular fluid. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.880] [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: 10/26/2022]
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Liang XF, Ogata HY, Oku H, Chen J, Hwang F. Abundant and constant expression of uncoupling protein 2 in the liver of red sea bream Pagrus major. Comp Biochem Physiol A Mol Integr Physiol 2004; 136:655-61. [PMID: 14613793 DOI: 10.1016/s1095-6433(03)00218-6] [Citation(s) in RCA: 24] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four overlapping cDNA fragments encoding a partial sequence for uncoupling protein 2 (UCP2) were amplified by PCR using degenerate primers from the liver of a marine teleost fish, red sea bream (Pagrus major). The partial sequence was 674 bp long, encoding 224 amino acids. The deduced amino acid sequence from the cDNA partial sequence contained the signature motifs for mitochondrial transporter protein and revealed positional identity higher than 72.8% with UCP2 from mammals. The fish UCP2 gene was highly expressed in the liver but almost undetectable in the visceral mesenteric adipose tissue. Using beta-actin as control, the UCP2 mRNA level was determined to be at least 20-fold higher in the liver than in the visceral mesenteric adipose tissues. Neither 48 h starvation nor high lipid diet had any significant effect on liver UCP2 gene expression, indicating that the abundant UCP2 gene expression was stable and might have some basic function in a fish liver that always contains high lipid content. The striking contrast of UCP2 gene expression in the two fish fat-depot organs is consistent with their large differences in oxidative capacity. We suggest that the fish liver may adapt to a constantly high fat deposit by maintaining high UCP2 expression to constrain reactive oxygen species (ROS) production and protect hepatocytes from apoptosis.
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Affiliation(s)
- Xu-Fang Liang
- Department of Biology, Jinan University, Shipai, Guangzhou, 510632, PR China.
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43
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Abstract
BACKGROUND Endometriosis is a complex disease associated with a wide range of immune responses, including pain, adhesion, exudation of peritoneal fluid, elevation of cytokine levels and generation of autoantibodies. Interleukin (IL)-18 is a strong pleiotropic cytokine known to be involved in various immune diseases. The aim of this study is to elucidate the role of IL-18 in the pathogenesis of endometriosis. METHODS IL-18 and IL-1beta concentrations were measured in the peritoneal fluid and sera of 39 endometriosis patients and 15 control women. Expression of IL-18 and IL-18 receptor alpha-chain (IL-18Ralpha) was analysed in endometriotic tissues immunohistochemically. The effects of IL-18 on cyclooxygenase (COX)-II gene expression were analysed in peritoneal fluid monocytes and endometriotic cells of endometriosis patients. RESULTS IL-18 concentrations in the peritoneal fluid of endometriosis patients averaged 592.57 +/- 108.27 pg/ml, significantly higher than 260.50 +/- 55.88 pg/ml in non-endometriotic samples. IL-18 concentrations in the serum did not differ significantly between endometriosis and control patients. Similarly, no significant differences were observed in IL-1beta concentrations in either the peritoneal fluid or the serum. IL-18 and IL-18Ralpha were expressed in endometriotic tissues. IL-18Ralpha expression was also observed in cells infiltrating into the inflammatory area of the endometriosis patients. COX-II was induced in peritoneal fluid monocytes and in endometriotic cells in response to IL-18 stimulation. CONCLUSIONS The elevation of IL-18 in the peritoneal fluid of endometriosis patients and the induction of COX-II in peritoneal monocytes by IL-18 suggest that IL-18 plays a pathogenic role in endometriosis.
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Affiliation(s)
- H Oku
- Department of Obstetrics and Gynecology, Institute for Advanced Medical Sciences, Japan
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Yamane J, Ogawa N, Oku H, Hashimoto K, Ishikawa M. A Current Controlled Electrostimulatoin Device for the Motion Control of Paramecia. ACTA ACUST UNITED AC 2004. [DOI: 10.1299/jsmermd.2004.15_3] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yamada K, Sato J, Oku H, Katakai R. Conformation of the transmembrane domains in peripheral myelin protein 22. Part 1. Solution-phase synthesis and circular dichroism study of protected 17-residue partial peptides in the first putative transmembrane domain. J Pept Res 2003; 62:78-87. [PMID: 12823620 DOI: 10.1034/j.1399-3011.2003.00073.x] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Charcot-Marie-Tooth disease (CMT) is the most commonly inherited peripheral neuropathy. DNA duplication and point mutation of the gene encoding peripheral myelin protein 22 (PMP22) have been found in CMT type 1A dominants. To investigate the influence of the point mutation of PMP22 on the secondary structure, protected partial peptides in the putative first transmembrane domain, wild type Boc-IVLH(Bom)VAVLVLLFVSTIV-OMe (1) and its Pro16 mutant Boc-IVLH(Bom)VAVPVLLFVSTIV-OMe (2) were synthesized. Circular dichorism (CD)-spectral analysis suggested that peptide 1 adopts a stable alpha-helical conformation in membrane-mimetic solvent,1-BuOH/1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) system. On the contrary, the mutant 2 favors beta-sheet conformation in the same solvent system. Interestingly, alpha-helix to beta-sheet transition of 2 was observed at higher contents of 1-BuOH than 70%.
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Affiliation(s)
- K Yamada
- Department of Chemistry, Gunma University, Gunma 376-8515, Japan
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46
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Ishida O, Oku H, Ikeda T, Nishimura M, Kawagoe K, Nakamura K. Is Chlamydia pneumoniae infection a risk factor for age related macular degeneration? Br J Ophthalmol 2003; 87:523-4. [PMID: 12714382 PMCID: PMC1771658 DOI: 10.1136/bjo.87.5.523] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- O Ishida
- Osaka Medical College, Osaka, Japan
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47
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Liang XF, Ogata HY, Oku H. Effect of dietary fatty acids on lipoprotein lipase gene expression in the liver and visceral adipose tissue of fed and starved red sea bream Pagrus major. Comp Biochem Physiol A Mol Integr Physiol 2002; 132:913-9. [PMID: 12095871 DOI: 10.1016/s1095-6433(02)00118-6] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [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: 11/29/2022]
Abstract
Juvenile red sea bream Pagrus major were fed either a commercial diet (diet 1) or diets supplemented with 10% oleate (diet 2), 5% oleate+5% linoleate (diet 3) or 5% oleate+5% n-3 polyunsaturated fatty acid mixture (diet 4) for 4 weeks. Following the conditioning period, the effects of dietary fatty acids on lipoprotein lipase (LPL) gene expression in the liver and visceral adipose tissue of fed (5 h post-feeding) and starved (48 h post-feeding) fish were investigated by competitive polymerase chain reaction. Fish liver showed substantial LPL mRNA expression that is not found in adult rat liver. When compared with diet 1, diets 2-4 tended to increase the LPL mRNA level in the liver, but tended to decrease it in the visceral adipose tissue under the fed condition. The reciprocal regulation of the liver and visceral adipose LPL mRNA abundance by dietary fatty acids was comparable to that of rat brown and white adipose tissue, respectively. The change in the LPL mRNA level by fatty acids was not completely consistent with the degree of fatty acid unsaturation. Our results indicate that the regulatory effect of dietary fatty acids on LPL gene expression was tissue-specific and related to feeding conditions, but was not solely dependent on the degree of unsaturation of fatty acids.
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Affiliation(s)
- Xu-Fang Liang
- National Research Institute of Aquaculture, Nansei, Mie 516-0193, Japan
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48
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Adachi S, Ogasawara T, Tsubamoto H, Oku H, Hori Y, Tsuji Y, Takemura T, Koyama K. Intravenous nedaplatin and intraarterial cisplatin with transcatheter arterial embolization for patients with locally advanced uterine cervical cancer. Int J Clin Pharmacol Res 2002; 21:105-10. [PMID: 12067139] [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: 02/25/2023]
Abstract
Nedaplatin is a platinum analog that has less renal toxicity and higher efficacy for uterine cervical cancer than cisplatin. Intraarterial cisplatin has been shown to be more effective than intravenous cisplatin in the treatment of cervical cancer. To improve the prognosis of cervical cancer, we studied combination chemotherapy of intravenous nedaplatin and intraarticular cisplatin with transcatheter arterial embolization (TAE). The criteria for selecting patients for this study were as follows: age 16-75 years, stage Ib2-IV according to the classification of the International Federation of Gynecology and Obstetrics (FIGO), performance status between 0 and 2, a creatinine clearance of >40 ml/min, adequate bone marrow and adequate renal and hepatic function. Thirty-two patients, aged 29-72 years (median: 55) were treated. FIGO stage was Ib2 in seven patients, IIa in seven patients, IIb in four, IIIa in one, IIIb in seven and IVa in six. Twenty-four patients had squamous cell carcinoma, three had adenocarcinoma and five had adenosquamous carcinoma. Written informed consent was obtained from all patients. Nedaplatin (30-70 mg/m2) was administered intravenously on day 1 and cisplatin (70 mg/m2) was administered intraarticularly via both uterine arteries on day 3 using the Seldinger method. TAE was then performed. This course of treatment was repeated every 3 weeks for 2-3 cycles. Response to the therapy was defined by magnetic resonance imaging. Partial response was found in 59% patients (19/32) and complete response in 34% (11/32), with an overall response rate of 94% (30/32). Myelosuppression was manageable. No grade 2 neurotoxicity was observed. The median follow-up was 32 months (6-53 months), with 84% of patients showing an overall survival of 1 year and 77% showing an overall survival of 2 years. These results show that this combination chemotherapy effected a high response rate. However, its influence on long-term survival remains to be determined.
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Affiliation(s)
- S Adachi
- Department of Obstetrics and Gynecology, Hyogo College of Medicine, Japan.
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Onoe M, Kitayama H, Matsumoto K, Oku H, Saga T. [Pitfall of modified ultrafiltration in pediatric cardiac surgery]. Kyobu Geka 2002; 55:556-60. [PMID: 12136584] [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: 02/25/2023]
Abstract
Since June, 1998, modified ultrafiltration (MUF) was performed for 92 consecutive children who underwent cardiac surgery using cardiopulmonary bypass, except those with atrial septal defect. Among 92 cases, MUF could not be completed in two cases because of the accident that many air bubbles were found in the arterial line of the CPB circuit. The causes of such trouble were discussed.
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Affiliation(s)
- M Onoe
- Department of Cardiovascular Surgery, Kinki University School of Medicine, Osaka-sayama, Japan
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50
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Otaki M, Ogawa T, Inoue T, Oku H. Off-pump coronary bypass grafting to double vessel disease with the pharmacological assist of esmolol. An experimental study. J Cardiovasc Surg (Torino) 2002; 43:307-11. [PMID: 12055561] [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: 02/25/2023]
Abstract
BACKGROUND To demonstrate the surgical efficacy and safety of off-pump coronary bypass grafting to double- or triple-vessel disease, we performed off-pump double bypass grafting using a brief local coronary occlusion with the pharmacological assist of esmolol. METHODS These experiments were conducted in 30 canine hearts with the left internal thoracic artery (ITA) grafted to the circumflex coronary artery (CFX) and the right ITA grafted to the left anterior descending coronary artery (LAD), off pump, using a brief local coronary occlusion through the left minithoracotomy. The coronary anastomosis was performed using a brief local occlusion of the coronary artery. An anastomosis between the left ITA and the CFX was done first, and then the right ITA and the LAD were anastomosed. Thirty animals were divided into 2 groups, group A (n=15) receiving esmolol just before (10 mg/kg on a bolus) and during the coronary artery occlusion (500 microg/kg/min continuously), and group B (n=15) without administrating esmolol as a control. RESULTS Operative deaths were 4 in group B and all of group A animals survived (p<0.05). All deaths were attributable to ventricular arrhythmias during/after coronary occlusion. Group B animals necessitating longer coronary occlusion time (more than 15 min) were more likely to fibrillate and more difficult to resuscitate than group A animals requiring coronary occlusion time more than 15 min. Segmental shortening on the echocardiogram demonstrated no significant difference between group A and B in both anterior and posterior wall segment. However, echocardiogram in animals necessitating coronary occlusion time more than 15 min demonstrated that segmental shortening in group A were better than in group B (18 vs 11%, p<0.05), and comparatively greater but not significant in the posterior wall (19 vs 14%). CONCLUSIONS The use of esmolol may be recommended to off-pump coronary bypass even to the double-vessel bypass, in order to make off-pump approach safer.
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Affiliation(s)
- M Otaki
- Department of Cardiac Surgery, Kinki University Hospital, Osaka, Japan
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