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Yanagihara Y, Tanaka A, Nagayoshi M, Yamaguchi T, Tanaka I, Ohno M, Itakura A. P–611 Innovative controlled ovarian stimulation (COS) for polycystic ovary syndrome (PCOS) produces high-quality oocytes and no ovarian hyper stimulation syndrome (OHSS). Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
How can we find an ovarian stimulation method that does not cause hyper stimulation syndrome but can produce a high pregnancy rate at one cycle?
Summary answer
This newly developed method for PCOS has a higher accumulative clinical outcome for one trial and no OHSS.
What is known already
Almost all conventional treatments for PCOS have managed to avoid OHSS by reducing the number of growing follicles, which are associated with high Estradiol levels and stimulate the production of vessel endothelial growth hormone (VEGF), leading to increased vessel permeability. Low dose FSH administration, In vitro maturation (IVM), Ovarian Drilling and Coasting have been performed to achieve this. However, their actual clinical outcome is still unsatisfactory.
Study design, size, duration
Evaluation of the efficiency of this method was conducted retrospectively at St. Mother Clinic. The embryonic development and the clinical outcome were studied for 34 PCOS patients during the period between November 2018 and December 2019.
Participants/materials, setting, methods
We started injections of FSH (150iu/ml), then we did ultrasound follicle monitoring. GnRH antagonist shots were started when the leading follicle reached 18mm and continued until the largest follicle was 22–24mm and the E2 value was over 4000pg/ml. Letrozole (2.5mg) and leuprorelin acetate (1.88mg) was injected as trigger. Two tablets each of Letrozole, Cabergoline and GnRH antagonist were given for 5 consecutive days after the oocyte retrieval. All embryos were cryopreserved.
Main results and the role of chance
Number of patients and cycles were 34 and 59. Average number of cryopreserved blastocysts was 6.12 (1–16). The frequencies of OHSS (mild, moderate, severe) were 29.4% (10/34), 0% (0/34), 0% (0/34). Average days between oocyte collection and withdrawal hemorrhage was 5.44(5–7). Cryopreservation rate was 100.0% (34/34). Clinical pregnancy rate and miscarriage rate was 42.3% (25/59) and 16.0% (4/25). The cumulative pregnancy rate was 73.7% (25/34). The four remaining unsuccessful cases still have 10,6,3 and 7 frozen embryos. So, there is a high possibility that they become successful, that would bring the cumulative pregnancy rate up to 82.3% (28/34).
Limitations, reasons for caution
This COS for PCOS seems promising, however it is premature to conclude that this method is established. This method requires caution monitoring for hormone level, follicle size and number and coagulant function. It also accompanied with the risk of ovarian hemorrhage on aspiration of a great number of oocytes.
Wider implications of the findings: This COS seems viable for PCOS cases. It could control the cohort of antral follicles with different doses of Letrozole to find the optimal COH method and it could become the first option for COS of PCOS.
Trial registration number
N/A
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Affiliation(s)
- Y Yanagihara
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - A Tanaka
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - M Nagayoshi
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - T Yamaguchi
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - I Tanaka
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - M Ohno
- Juntendo University School of Medicine, Department of Obstetrics and Gynecology, Bunkyo-ku, Japan
| | - A Itakura
- Juntendo University School of Medicine, Department of Obstetrics and Gynecology, Bunkyo-ku, Japan
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Tanaka A, Yanagihara Y, Nagayoshi M, Yamaguchi T, Tanaka I, Itakura A. P–023 Innovative ultra-rapid vitrification method for five or fewer testicular spermatozoa from non-obstructive azoospermic men after microsurgical testicular sperm extraction (Micro-TESE). Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
What technique can be used to successfully cryopreserve five or fewer testicular spermatozoa from non-obstructive azoospermic men?
Summary answer
This method for cryopreserving five or fewer spermatozoa from non-obstructive azoospermic men showed a recovery rate above 90% and a survival rate of about 70%.
What is known already
Clinical outcomes of ICSI when using only five or fewer testicular spermatozoa after cryopreservation have been unsuccessful and are considered to be inferior to those using testicular fresh spermatozoa from Micro-TESE. A possible cause of these poor results has been the lack of a successful freezing technique. In these cases, repeated Micro-TESE and simultaneous oocyte pick up has been the only available treatment.
Study design, size, duration
Evaluation of the efficiency of cryopreservation by modified permeable cryoprotectant-free vitrification method (HTF supplemented with 0.1M sucrose and 10% SPS) for five or fewer testicular spermatozoa from 113 non-obstructive azoospermic men using Micro-TESE was conducted retrospectively at St. Mother Clinic between 2011 and 2018.
Participants/materials, setting, methods
This study included 113 non-obstructive azoospermic men. Each motile spermatozoon was carefully aspirated tail first into the pipette, put into a 2-μl microdroplet media of the vitrification medium near the tip of the Cryotop (Kitazato Corporation, Tokyo, Japan) submerged in liquid nitrogen vapor for 2 min and then immediately plunged in liquid nitrogen. The vitrified spermatozoa were warmed by dipping them into a droplet media. Successfully recovered motile sperm were selected and used for ICSI.
Main results and the role of chance
Number of patients, transfer cycles and collected sperms were 113, 192 and 560. Mean age of patients and their wives were 32.0±3.7y and 28.4±5.8y. Clinical pregnancy rate, miscarriage rate, live birth rate and number of live offspring were 24.0% (46/192), 19.6% (9/46), 19.3% (37/192) and 37 (Male: Female = 17: 20). Sperm recovery rate and survival rate were 90.3% (506/560) and 70.4% (356/506). Fertilization rate and mean number of transferred embryos were 51.6% (99/192) and 1.73 (1–2). Mean gestational weeks and mean body weight at birth were 39.23±5.27w and 2852.31±314.28g. No congenital anomalies were observed in any of the babies.
Limitations, reasons for caution
The maximum number of spermatozoa to which this method can be applied successfully is about 10. When the number of aspirated spermatozoa is over 10, some of them change direction and reach the mineral oil, and once this happens, they cannot be expelled out of the pipette.
Wider implications of the findings: This technique is very useful for the cryopreservation of very small numbers of testicular spermatozoa (fewer than 10) in order to avoid or reduce Micro-TESE interventions.
Trial registration number
N/A
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Affiliation(s)
- A Tanaka
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - Y Yanagihara
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - M Nagayoshi
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - T Yamaguchi
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - I Tanaka
- Saint Mother Hospital, Department of Obstetrics and Gynecology, Kitakyushu, Japan
| | - A Itakura
- Juntendo University School of Medicine, Department of Obstetrics and Gynecology, Bunkyo-ku, Japan
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Kumagai A, Takeda S, Sohara E, Uchida S, Iijima H, Itakura A, Koya D, Kanasaki K. Dietary Magnesium Insufficiency Induces Salt-Sensitive Hypertension in Mice Associated With Reduced Kidney Catechol-O-Methyl Transferase Activity. Hypertension 2021; 78:138-150. [PMID: 33840199 DOI: 10.1161/hypertensionaha.120.16377] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Asako Kumagai
- Faculty of Medicine, Internal Medicine I, Shimane University, Izumo, Japan (A.K., K.K.)
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Juntendo University, Bunkyo, Tokyo, Japan (A.K., S.T., A.I.)
- Department of Diabetology and Endocrinology (A.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
| | - Satoru Takeda
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Juntendo University, Bunkyo, Tokyo, Japan (A.K., S.T., A.I.)
| | - Eisei Sohara
- Department of Nephrology, Tokyo Medical and Dental University, Yushima, Bunkyo, Japan (E.S., S.U.)
| | - Shinichi Uchida
- Department of Nephrology, Tokyo Medical and Dental University, Yushima, Bunkyo, Japan (E.S., S.U.)
| | - Hiroshi Iijima
- School of Pharmacy, Nihon University, Chiba, Japan (H.I.)
| | - Astuo Itakura
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Juntendo University, Bunkyo, Tokyo, Japan (A.K., S.T., A.I.)
| | - Daisuke Koya
- Department of Diabetology and Endocrinology (A.K., D.K.), Kanazawa Medical University, Ishikawa, Japan
- Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (D.K., K.K.), Kanazawa Medical University, Ishikawa, Japan
| | - Keizo Kanasaki
- Faculty of Medicine, Internal Medicine I, Shimane University, Izumo, Japan (A.K., K.K.)
- Division of Anticipatory Molecular Food Science and Technology, Medical Research Institute (D.K., K.K.), Kanazawa Medical University, Ishikawa, Japan
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Ikemoto Y, Kuroda K, Ochiai A, Yamashita S, Ikuma S, Nojiri S, Itakura A, Takeda S. Prevalence and risk factors of zygotic splitting after 937 848 single embryo transfer cycles. Hum Reprod 2018; 33:1984-1991. [DOI: 10.1093/humrep/dey294] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/16/2018] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Ikemoto
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
| | - K Kuroda
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
- Center for Reproductive Medicine and Implantation Research, Sugiyama Clinic Shinjuku, Nishi-shinjuku 1-19-6, Shinjuku-ku, Tokyo, Japan
| | - A Ochiai
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
| | - S Yamashita
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
- Department of Obstetrics and Gynecology, Oita University, Faculty of Medicine, Idaigaoka 1-1, Hasama-machi, Yufu-shi, Oita, Japan
| | - S Ikuma
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
| | - S Nojiri
- Medical Technology Innovation Center, Juntendo University, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
- Clinical Research and Trial Center, Juntendo University Hospital, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
| | - A Itakura
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
| | - S Takeda
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyoku, Tokyo, Japan
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Cho T, Higaki H, Hirata M, Hojo H, Ichimura M, Ishii K, Itakura A, Katanuma I, Kohagura J, Nakashima Y, Saito T, Tatematsu Y, Yoshikawa M, Itoh H, Minami R, Nagashima S, Numakura T, Watanabe H, Yoshida M, Yatsu K, Miyoshi S. Summarized Scaling Laws of Plasma Confining Potential Formation and Effects in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2018. [DOI: 10.13182/fst03-a11963560] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Cho
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Higaki
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Hojo
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - I. Katanuma
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Saito
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Tatematsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Itoh
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - R. Minami
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Nagashima
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Numakura
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H. Watanabe
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshida
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
| | - S. Miyoshi
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577, Japan
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Seto S, Itakura A, Okagaki R, Suzuki M, Ishihara O. An algorithm for the management of coagulopathy from postpartum hemorrhage, using fibrinogen concentrate as first-line therapy. Int J Obstet Anesth 2017; 32:11-16. [DOI: 10.1016/j.ijoa.2017.03.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 02/28/2017] [Accepted: 03/10/2017] [Indexed: 11/29/2022]
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Kato T, Kanemaru A, Sugawara Y, Kawaji Y, Hiraoka T, Honda T, Nakajima R, Makita A, Itakura A, Yamazaki R, Ohta T. A combination intervention (cognitive training and physical exercise) could improve or maintain cognitive functioning in MCI subjects. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1881] [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: 10/18/2022]
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Kanemaru A, Kato T, Sugawara Y, Kawaji Y, Hiraoka T, Honda T, Nagajima R, Makita A, Itakura A, Yamazaki R, Ota T. The effects of the intervention using physical exercise and cognitive training on the mental status of the elderly with mild cognitive impairment or mild dementia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1876] [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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9
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Cho T, Higaki H, Hirata M, Hojo H, Ichimura M, Ishii K, Islam K, Itakura A, Katanuma I, Kohagura J, Nakashima Y, Numakura T, Saito T, Tatematsu Y, Yoshikawa M, Tokioka S, Yokoyama N, Miyake Y, Tomii Y, Kojima Y, Takemura Y, Imai T, Yoshida M, Sakamoto K, Pastukhov VP, Miyoshi S. Recent Progress in the GAMMA 10 Tandem Mirror. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a601] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Cho
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Higaki
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - H. Hojo
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Islam
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - I. Katanuma
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Numakura
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Saito
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Tatematsu
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - S. Tokioka
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - N. Yokoyama
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Miyake
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Tomii
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Kojima
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Takemura
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Imai
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshida
- JAERI, Naka Fusion Research Establishment, Ibaraki, Japan
| | - K. Sakamoto
- JAERI, Naka Fusion Research Establishment, Ibaraki, Japan
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Cho T, Higaki H, Hirata M, Hojo H, Ichimura M, Ishii K, Islam K, Itakura A, Katanuma I, Kohagura J, Minami R, Nakashima Y, Numakura T, Saito T, Tatematsu Y, Yoshikawa M, Watanabe O, Kubota Y, Kobayashi T, Yamaguchi Y, Saimaru H, Higashizono Y, Miyata Y, Kiminami S, Shimizu K, Itou M, Ikuno T, Mase A, Yasaka Y, Sakamoto K, Yoshida M, Kojima A, Ogura K, Nishino N, Horton W, Kariya T, Imai T, Pastukhov V, Miyoshi S. Overview of Recent Progress in the GAMMA 10 Tandem Mirror. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Cho
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - H. Higaki
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - M. Hirata
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - K. Islam
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - R. Minami
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - T. Numakura
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - T. Saito
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - Y. Tatematsu
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - O. Watanabe
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - Y. Kubota
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - T. Kobayashi
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - Y. Yamaguchi
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - H. Saimaru
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - Y. Higashizono
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - Y. Miyata
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - S. Kiminami
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - K. Shimizu
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - M. Itou
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - T. Ikuno
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - A. Mase
- Art, Science and Technology Center for Cooperative Research, Kyushu University, Japan
| | - Y. Yasaka
- Department of Electrical and Electronics Engineering, Kobe University, Japan
| | - K. Sakamoto
- Naka Fusion Research Establishment, Japan Atomic Energy Agency, Japan
| | - M. Yoshida
- Naka Fusion Research Establishment, Japan Atomic Energy Agency, Japan
| | - A. Kojima
- Naka Fusion Research Establishment, Japan Atomic Energy Agency, Japan
| | - K. Ogura
- Graduate School of Science and Technology, Niigata University, Japan
| | - N. Nishino
- Graduated School of Engineering, Hiroshima University, Japan
| | - W. Horton
- Institute for Fusion Studies, The University of Texas at Austin, USA
| | - T. Kariya
- Toshiba Electron Tubes and Devices Co. Ltd., Tochigi, Japan
| | - T. Imai
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
| | - V.P. Pastukhov
- Russian Research Center “Kurchatov Institute”, Moscow, Russia Kurchatov Institute, Russia
| | - S. Miyoshi
- Plasma Research Center, University of Tsukuba, Ibaraki, Japan
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Aoki Y, Kumakiri J, Itakura A, Kikuchi I, Takahashi N, Satoru T. Should sexual intercourse be avoided during the embryo transfer cycle? Life-threatening ruptured heterotopic pregnancy after single thawed embryo transfer: case report and review of the literature. CLIN EXP OBSTET GYN 2017. [DOI: 10.12891/ceog3647.2017] [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: 11/01/2022]
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Aoki Y, Kumakiri J, Itakura A, Kikuchi I, Takahashi N, Satoru T. Should sexual intercourse be avoided during the embryo transfer cycle? Life-threatening ruptured heterotopic pregnancy after single thawed embryo transfer: case report and review of the literature. CLIN EXP OBSTET GYN 2017; 44:489-491. [PMID: 29949304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND To report the life-threatening complication of a raptured heterotopic pregnancy occurring from thawed single embryo transfer. CASE REPORT A 33-year-old woman underwent in vitro fertilization (IVF) under a step-up regimen. After oocyte collection, blastocysts were frozen, and a single frozen-thawed blastocyst was then transferred according to the natural cycle. On day 17 after embryo transfer, an intrauterine pregnancy was confirmed. On day 28, she complained of sudden abdominal pain and ultrasonography revealed marked fluid retention in the peritoneal cavity. Emergency laparoscopy was performed, revealing hemoperitoneum and a ruptured interstitial heterotopic pregnancy (HP), which was then resected laparoscopically. Because sexual intercourse had occurred shortly before the transfer, a HP comprising a spontaneous pregnancy and a pregnancy achieved by assisted reproductive technology was assumed. The fetus in the uterus survived and was delivered. CONCLUSION In this case, however, despite the single embryo transfer during the natural-cycle frozen-thawed embryo transfer process, the risk of life-threatening complication as a HP as a consequence of spontaneous pregnancy after sexual intercourse remained.
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Ohmaru T, Miki A, Ohkuchi A, Takahashi K, Itakura A, Matsubara S, Suzuki M. PP111. The preceding features before onset of gestational hypertension and preeclampsia in home blood pressure monitoring: The existence of the inflection point and the rapid increased speed of blood pressure. Pregnancy Hypertens 2012; 2:299-300. [PMID: 26105433 DOI: 10.1016/j.preghy.2012.04.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION It has not been clarified whether home blood pressure monitoring (HBPM) during pregnancy is useful to detect high risk pregnant women with later onset of gestational hypertension (GH) and preeclampsia (PE). OBJECTIVES We thought to determine the preceding features of blood pressure (BP) in HBPM before the onset of GH and PE. We especially focused on the existence of the inflection point, its level, when it occurs, and the increased speed of BP after the inflection point. We compared these features in normal pregnant women (NP), women with GH, and women with PE. METHODS In this prospective cohort study, 361 singleton pregnant women, among them 100 women recruited due to high risk for GH/PH in the second trimester, participated in a couple of tertiary perinatal centers between 2008 and 2010. HBPM were measured with the validated OMRON HEM-5001(R) automated digital oscillometric sphygmomanometer (OMRON Healthcare Japan). The device was programmed to take three consecutive readings at 15-second interval. HBPM was measured twice a day, at the time of awakening and sleep, through the first to third trimester, and the average systolic blood pressure (SBP) and diastolic blood pressure (DBP) of each gestational week (almost 42 times a week) were calculated. We defined the data of HBPM which started before 28 gestational weeks and continued until 2 weeks before the onset of GH/PE or delivery are eligible. The increased speed of systolic or diastolic BP after the inflection point was defined as ("BP at the onset in GH/PE or at delivery in NP" - "BP at the inflection point") / ("Gestational weeks at the onset in GH/PE or at delivery in NP" - "Gestational weeks at the inflection point"). If there was no inflection point in HBPM, the increased speed of BP was defined as zero. The comparisons were performed using one-way analysis of variance (ANOVA) followed by multiple comparison. Data were shown as mean±SE. RESULTS A total of 17 (4.7%) women developed PE, and 12 (3.3%) GH.The systolic blood pressure (SBP) levels at the inflection point in NP, GH and PE was 102.4±1.3, 118.7±2.9 and 117.4±2.2mmHg, respectively (Significant pairs: NP < GH, PE); the diastolic blood pressure (DBP) levels at the inflection point was 59.2±1.0, 74.5±2.0 and 73.1±2.0mmHg, respectively (NP < GH, PE). The inflection point in NP, GH and PE occurred at 31.3±0.9, 28.4±1.5 and 22.3±1.4weeks, respectively (PE < GH, NP). The increased speed of SBP in NP, GH and PE was 1.2±0.1, 3.0±0.4 and 4.7±0.7mmHg/wk, respectively (NP < GH, PE); the increased speed of DBP was1.1±0.1, 2.1±0.3 and 2.8±0.4mmHg/wk, respectively (NP < GH, PE). CONCLUSION In women with later onset of GH/PE, the BP level at the inflection points was higher than in NP. The average inflection point in PE was earlier gestational weeks than in GH and NP. The average increased speed of blood pressure after the inflection point in GH/PE was faster than in NP. The preceding features of BP in HBPM may be clinically useful to detect high risk women with later onset of GH/PE.
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Affiliation(s)
- T Ohmaru
- Obstetrics and Gynecology, Jichi Medical University School of Medicine, Tochigi, Japan
| | - A Miki
- Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - A Ohkuchi
- Obstetrics and Gynecology, Jichi Medical University School of Medicine, Tochigi, Japan
| | - K Takahashi
- Obstetrics and Gynecology, Jichi Medical University School of Medicine, Tochigi, Japan
| | - A Itakura
- Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - S Matsubara
- Obstetrics and Gynecology, Jichi Medical University School of Medicine, Tochigi, Japan
| | - M Suzuki
- Obstetrics and Gynecology, Jichi Medical University School of Medicine, Tochigi, Japan
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Kajihara T, Tochigi H, Uchino S, Itakura A, Brosens JJ, Ishihara O. Differential effects of urinary and recombinant chorionic gonadotropin on oxidative stress responses in decidualizing human endometrial stromal cells. Placenta 2011; 32:592-7. [PMID: 21641641 DOI: 10.1016/j.placenta.2011.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Revised: 04/14/2011] [Accepted: 05/06/2011] [Indexed: 11/28/2022]
Abstract
Human chorionic gonadotropin (hCG) is one of the earliest signals secreted by the implanting embryo. In addition to its well-known luteotropic function in early pregnancy, hCG also acts directly on decidualizing endometrium. Recently, we demonstrated that recombinant hCG (rhCG) prevented apoptosis in decidualizing human endometrial stromal cells (HESCs) exposed to oxidative stress. Two hCG preparations are widely used clinically: rhCG, produced by recombinant DNA technology, and urinay hCG (uhCG), extracted from urine of post-menopausal women. However, an analysis of the direct effects of rhCG and uhCG on the decidual phenotype of HESCs has not yet been done. In this study, we investigated the effects of uhCG and rhCG on the morphological and functional profiles of decidualizing HESCs. We demonstrate that neither rhCG nor uhCG alter the morphological appearance of the decidual HESC cultures, although rhCG but not uhCG attenuated prolactin expression, a major decidual marker protein. Moreover, rhCG, but not uhCG, protected decidualizing HESCs from oxidative cell death, mediated at least in part by two major mechanisms. First, rhCG, but not uhCG, enhances the expression of manganese superoxide dismutase, a cardinal enzyme in the cellular defense against oxidative damage. Second, rhCG signaling selectively limits activation of the apoptotic machinery in decidualizing HESCs by enhancing Bcl-2 expression whereas uhCG induces the expression of Fas ligand. Our results suggest that rhCG might be a preferable agent to protect the maternal decidua against oxidative damage in pregnancy, especially at the time of implantation and beyond.
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Affiliation(s)
- T Kajihara
- Department of Obstetrics and Gynecology, Saitama Medical University, Iruma-gun, Saitama, Japan.
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15
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Yoshikawa M, Matsumoto T, Shima Y, Negishi S, Miyata Y, Mizuguchi M, Imai N, Yoneda Y, Hojo H, Itakura A, Imai T. Radial density profile measurement by using the multichannel microwave interferometer in GAMMA 10. Rev Sci Instrum 2008; 79:10E706. [PMID: 19044524 DOI: 10.1063/1.2956832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Plasma density radial profile measurements are an important study for fusion plasma researches. We reconstructed a multichannel microwave interferometer for radial plasma electron density and density fluctuation measurements with both changing the transmission horn position and using the Teflon lens by only using this system in a single plasma shot. By using this system, we can successfully measure the radial density and density fluctuation spectra in a single plasma shot.
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Affiliation(s)
- M Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
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16
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Maeda R, Isowa N, Kawasaki Y, Tokuyasu H, Itakura A, Miura H, Onuma H. [Pseudomesotheliomatous carcinoma of the lung]. Kyobu Geka 2007; 60:555-8. [PMID: 17642217] [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: 05/16/2023]
Abstract
Pseudomesotheliomatous carcinoma is the lung cancer with marked pleural extension resembling malignant pleural mesothelioma on diagnostic imaging. We report a rare case of pseudomesotheliomatous carcinoma of the lung in a 72-year-old man. The patient had complained of dyspnea and a chest roentgenogram showed right pleural effusion. Computed tomography (CT) of the chest revealed diffuse irregular pleural thickening, which mimicked pleural malignant mesothelioma. Pleural tissue sampling was performed to obtain definitive diagnosis by video-assisted thoracoscopic surgery. At the operation. the tumor was found to have a spread along the pleural surface and primary lesion was not detected in the right lung parenchyma. Immunohistochemically, the tumor was positive for carcinoembryonic antigen (CEA), but negative for calretinin, thrombomodulin, and pulmonary surfactant apoprotein. Final diagnosis was adenocarcinoma of the lung.
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Affiliation(s)
- Ryo Maeda
- Division of Thoracic Surgery, Matsue Red Cross Hospital, Matsue, Japan
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17
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Nakahara A, Yoshikawa M, Shima Y, Matsumoto T, Nakahara A, Yanagi N, Itakura A, Cho T, Mase A, Kogi Y. Measurements of 2-Dimensional Plasma Density Distributions by the Phase-Imaging Method in GAMMA 10. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1374] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Nakahara
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - Y. Shima
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - T. Matsumoto
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - A. Nakahara
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - N. Yanagi
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - A. Itakura
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - T. Cho
- Plasma Research Center, University of Tsukuba: 1-1-1 Tennoudai, Tsukuba, Ibaraki, Japan, 305-8577
| | - A. Mase
- Art, Science and Technology Center for Cooperative Research, University of Kyusyu, Kasuga: 6-1 Kasuga-Koen, Kasuga, Fukuoka, Japan, 816-8580
| | - Y. Kogi
- Art, Science and Technology Center for Cooperative Research, University of Kyusyu, Kasuga: 6-1 Kasuga-Koen, Kasuga, Fukuoka, Japan, 816-8580
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Mase A, Kogi Y, Hojo H, Yoshikawa M, Itakura A, Cho T, Tokuzawa T, Kawahata K, Nagayama Y, Oyama N, Luhmann NC, Park HK, Mazzucato E. Progress in Microwave Diagnostics and Physics Issues in Magnetically Confined Plasmas. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Mase
- Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Y. Kogi
- Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - N. Oyama
- Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan
| | - N. C. Luhmann
- Department of Applied Science, University of California at Davis, Davis, California 95616, U.S.A
| | - H. K. Park
- Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, U.S.A
| | - E. Mazzucato
- Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, U.S.A
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Kubota Y, Yoshikawa M, Nakashima Y, Kobayashi T, Higashizono Y, Matama K, Itakura A, Cho T. Behavior of Fueled Particles and Its Effects on Plasma Parameters in the GAMMA 10 Tandem Mirror. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Kubota
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Kobayashi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Higashizono
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K. Matama
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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20
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Kojima A, Ishii K, Miyata Y, Kakiuchi H, Kaidou N, Yoshikawa M, Itakura A, Ichimura M, Cho T. Observation of Radial Particle Transport Induced by the Fluctuation Measured with a Gold Neutral Beam Probe. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Kojima
- Japan Atomic Energy Agency, 801-1, Mukoyama, Naka, Ibaraki, Japan, 311-0193,
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - Y. Miyata
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - H. Kakiuchi
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - N. Kaidou
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, 1-1-1, Tennodai, 305-8577, Tsukuba, Ibaraki, Japan
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21
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Kaneko T, Takahashi K, Hatakeyama R, Saito T, Tatematsu Y, Nozaki K, Machida N, Kaitsuka T, Itakura A, Yoshikawa M, Cho T. Nonlinear Effects of High Power Plug/Barrier Electron Cyclotron Resonance Heating on Propagation and Radiation of Cyclotron Waves. Fusion Science and Technology 2007. [DOI: 10.13182/fst07-a1338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Kaneko
- Department of Electronic Engineering, Tohoku University, Sendai 980-8579, Japan
| | - K. Takahashi
- Department of Electronic Engineering, Tohoku University, Sendai 980-8579, Japan
| | - R. Hatakeyama
- Department of Electronic Engineering, Tohoku University, Sendai 980-8579, Japan
| | - T. Saito
- Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan
| | - Y. Tatematsu
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - K. Nozaki
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - N. Machida
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T. Kaitsuka
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
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22
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Cho T, Kohagura J, Numakura T, Hirata M, Higaki H, Hojo H, Ichimura M, Ishii K, Islam KM, Itakura A, Katanuma I, Minami R, Nakashima Y, Saito T, Tatematsu Y, Watanabe O, Yoshikawa M, Kojima A, Miyake Y, Miyata Y, Shimizu K, Tomii Y, Yoshida M, Sakamoto K, Imai T, Pastukhov VP, Miyoshi S. Observation and control of transverse energy-transport barrier due to the formation of an energetic-electron layer with sheared ExB flow. Phys Rev Lett 2006; 97:055001. [PMID: 17026107 DOI: 10.1103/physrevlett.97.055001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2005] [Indexed: 05/12/2023]
Abstract
Off-axis electron-cyclotron heating in an axisymmetric barrier mirror produces a cylindrical layer with energetic electrons, which flow through the central cell and into the end region. The layer, producing a localized bumped ambipolar potential Phi(C), forms a strong shear of radial electric fields E(r) and peaked vorticity with the direction reversal of E(r)xB sheared flow near the Phi(C) peak. Intermittent vortexlike turbulent structures near the layer are suppressed in the central cell by this actively produced transverse energy-transport barrier; this results in T(e) and T(i) rises surrounded by the layer.
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Affiliation(s)
- T Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Ishimatsu S, Itakura A, Okada M, Kotani T, Iwase A, Kajiyama H, Ino K, Kikkawa F. Angiotensin II Augmented Migration and Invasion of Choriocarcinoma Cells Involves PI3K Activation Through the AT1 Receptor. Placenta 2006; 27:587-91. [PMID: 16122787 DOI: 10.1016/j.placenta.2005.07.001] [Citation(s) in RCA: 18] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2005] [Revised: 06/27/2005] [Accepted: 07/05/2005] [Indexed: 11/20/2022]
Abstract
While angiotensin II (Ang II) has been shown to inhibit migration of extravillous trophoblasts via plasminogen activator inhibitor-1 (PAI-1) activation, it has remained unclear whether it stimulates or inhibits malignant behavior of choriocarcinoma cells. Since we previously found an involvement of the renin-angiotensin system (RAS) in the proliferative potential in choriocarcinoma cells (BeWo), mediated via the Ang II type 1 receptor (AT1R), in the present study we investigated the effects of Ang II on choriocarcinoma cell migration/invasion in vitro using Transwell cell culture chambers. Ang II (10(-8)M) promoted migration and invasion by a choriocarcinoma cell line and augmented random cell mobility on checkerboard analysis. Immunoblotting showed Ang II to activate the phosphorylation of FAK and Akt in BeWo cells. Furthermore Ang II effects on cell migration were abolished by a selective AT1R antagonist and a phosphatidylinositol 3-kinase (PI3K) inhibitor. The present results suggest that Ang II-induced migration and invasion of choriocarcinoma cells probably involves PI3K following binding to the AT1R.
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Affiliation(s)
- S Ishimatsu
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
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Yamamoto E, Ito T, Abe A, Sido F, Ino K, Itakura A, Mizutani S, Dovat S, Nomura S, Kikkawa F. Ikaros is expressed in human extravillous trophoblasts and involved in their migration and invasion. Mol Hum Reprod 2005; 11:825-31. [PMID: 16364975 DOI: 10.1093/molehr/gah239] [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
The transcriptional factor Ikaros was originally found to function as a key regulator of lymphocyte differentiation. In addition, we have reported that Ikaros regulates the human placental leucine aminopeptidase (P-LAP)/insulin-regulated aminopeptidase (IRAP) gene in choriocarcinoma trophoblastic cells, suggesting that Ikaros might be involved in placental development, while even its presence in human placenta remains undetermined. We therefore sought to clarify the location and roles of Ikaros in human placenta. Immunohistochemical analysis showed modest Ikaris expression in syncytium, and intense expression in extravillous trophoblasts (EVTs) in first trimester placenta. Western blot analysis showed that villous trophoblasts principally expressed Ikaros-2/3, while Ikaros-x (Ikx) was predominantly expressed in cultured EVTs. Furthermore, to investigate the functional role of Ikx in EVTs, the EVT cell line HTR-8/SVneo was infected with a retrovirus vector expressing the hemagglutinin (HA)-tagged dominant negative isoform Ikaros-6 (Ik6), which prevents the DNA-binding activity of Ikx. Antibody against HA showed successful transduction of Ik6 in HTR-8/SVneo cells on immunocytochemistry and Western blotting. Transduction of Ik6 significantly reduced the migratory and invasive abilities of HTR-8/SVneo cells. These results suggest that Ikx is involved in migration and invasion of EVTs in early placentation.
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Affiliation(s)
- E Yamamoto
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Nishikawa M, Itakura A, Ito M, Takeuchi M, Sato Y, Kajiyama H, Mizutani S, Kikkawa F. Changes in placental dipeptidyl peptidase IV in preeclampsia with intrauterine growth restriction. Horm Metab Res 2005; 37:408-13. [PMID: 16034711 DOI: 10.1055/s-2005-870229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The purpose of this study was to examine alterations in placental expression of dipeptidyl peptidase IV (DPPIV). The localization of DPPIV was compared in control and preeclamptic placentas. Enzyme activity, mRNA, and protein expression were also measured. In term placentas, DPPIV was expressed preferentially in the fetal vascular endothelial cells within stem villi and only weakly in the villous stromal cells. DPPIV activity in control placentas showed no remarkable changes throughout gestation. Levels of activity in samples from normotensive control cases and women having preeclampsia with or without intrauterine growth restriction were 11.8 +/- 2.1, 13.4 +/- 1.1, and 15.3 +/- 0.62 pmol pNA/min/mg protein, respectively. The preeclamptic placentas with intrauterine growth restriction thus showed significantly higher levels of activity than the controls (p < 0.05). We propose that placental DPPIV influences fetal metabolism via the degradation of fetoplacental circulating bioactive peptides, including incretins, resulting in the regulation of fetal growth.
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Affiliation(s)
- M Nishikawa
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Japan
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26
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Cho T, Yoshida M, Kohagura J, Hirata M, Numakura T, Higaki H, Hojo H, Ichimura M, Ishii K, Islam KM, Itakura A, Katanuma I, Nakashima Y, Saito T, Tatematsu Y, Yoshikawa M, Kojima Y, Tokioka S, Yokoyama N, Tomii Y, Imai T, Pastukhov VP, Miyoshi S. Observation of the effects of radially sheared electric fields on the suppression of turbulent vortex structures and the associated transverse loss in GAMMA 10. Phys Rev Lett 2005; 94:085002. [PMID: 15783899 DOI: 10.1103/physrevlett.94.085002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2004] [Indexed: 05/24/2023]
Abstract
Vortexlike turbulent structures in hot-ion mode plasmas with several keV are observed in the case with a radially produced weak shear of electric fields E(r). However, a strong E(r) shear formation due to a high ion-confining potential phi(c) production clears up these vortices together with plasma-confinement improvement and disappearance of both drift-wave and turbulencelike Fourier spectral signals. These findings are based on three-time progress in phi(c) in comparison to phi(c) attained 1992-2002. The significant advance of phi(c) is well extended in line with proposed potential-formation physics scalings.
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Affiliation(s)
- T Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Kojima A, Ishii K, Takemura Y, Hagisawa K, Miyata Y, Yamaguchi T, Masuda Y, Itakura A, Yoshikawa M, Ichimura M, Cho T. Measurement of the Radial Flux Induced by the Fluctuations Using the Gold Neutral Beam Probe in the Tandem Mirror GAMMA 10. Fusion Science and Technology 2005. [DOI: 10.13182/fst05-a672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Kojima
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Miyata
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Yamaguchi
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Masuda
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
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Itakura A, Takagi S, Tsunoda S, Hirai T, Hojo H, Shima Y, Yoshikawa M, Cho T. Fluctuation Measurement Using an Ultrashort-Pulse Reflectometry on the GAMMA 10. Fusion Science and Technology 2005. [DOI: 10.13182/fst05-a670] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - S. Takagi
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - S. Tsunoda
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T. Hirai
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Y. Shima
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
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Yoshikawa M, Saito M, Kubota Y, Kobayashi T, Nakashima Y, Higashizono Y, Itakura A, Hirata M, Miyake Y, Kohagura J, Cho T. Hα Measurements in the Plug/Barrier Cells of the Tandem Mirror GAMMA 10. Fusion Science and Technology 2005. [DOI: 10.13182/fst05-a683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Saito
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Kubota
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Kobayashi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Higashizono
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Hirata
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Miyake
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Abstract
To shed light on the role of bradykinin in preeclampsia in addition to acute hypoxia, we measured the activity of kininase I, the enzyme responsible for its degradation, in umbilical plasma. Kininase I activity in umbilical arteries was compared with that in the umbilical veins. The relationship between kininase I and pH values was also evaluated in women with and without preeclampsia. Also, enzyme activity in supernatants of fetal hepatic cells (NFL/T) cultured under hypoxic or normoxic conditions were determined. Kininase I activity levels in fetal umbilical arteries and veins (n = 33) were similar (r = 0.77). Hypoxia caused suppression of kininase I activity in the supernatant cultures of NFL/T after one hour. However, after 8 and 24 hours, kininase I activity was significantly greater than under normoxic conditions (p < 0.05). Kininase I activity of fetal umbilical vein significantly decreased in the presence of acidemia in the uncomplicated group (n = 75, r = 0.42), whereas the activity negatively correlated with umbilical arterial pH in the preeclamptic group (n = 10, r = - 0.65). Kininase I activity levels in cases complicated with preeclampsia were significantly higher than without preeclampsia (49.2 +/- 9.1 vs. 66.2 +/- 11.3 nmol/ml/min). The present study indicates that kininase I acts as a regulatory factor in bradykinin degradation.
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Affiliation(s)
- Y Tsukahara
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Japan
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31
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Murata Y, Ohno Y, Itakura A, Takeuchi M, Nakashima Y, Kuno N, Mizutani S. Bestatin results in pathophysiological changes similar to preeclampsia in rats via induction of placental apoptosis. Horm Metab Res 2003; 35:343-8. [PMID: 12920655 DOI: 10.1055/s-2003-41354] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE To establish a rat preeclampsia model with fetoplacental growth restriction caused by bestatin via induction of placental apoptosis. STUDY DESIGN 200 mg/kg/day of bestatin or saline as a control were infused intraperitoneally into pregnant Wistar rats from 15 days' gestation. In the first experiment, maternal blood pressure and proteinuria were examined during the pre- and postpartum periods. In the second experiment, cesarean sections were performed at 20 days' gestation and the weights of pups and placentas, and levels of proteinuria and placental apoptosis were examined. RESULTS Physiological decrease of blood pressure in late pregnancy was not detected in the bestatin group but proteinuria level at 20 days' gestation was elevated. The weights of pups and placentas in the bestatin group were significantly lower than those in the controls, bestatin strongly inducing apoptosis in the placenta. CONCLUSION Bestatin may cause a preeclampsia-like condition through induction of placental apoptosis.
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Affiliation(s)
- Y Murata
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, Japan
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32
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Itakura A, Okamura M, Ohta T, Mizutani S. Conservative treatment of a second trimester cervicoisthmic pregnancy diagnosed by magnetic resonance imaging. Obstet Gynecol 2003; 101:1149-51. [PMID: 12738134 DOI: 10.1016/s0029-7844(02)02625-x] [Citation(s) in RCA: 8] [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: 10/27/2022]
Abstract
BACKGROUND A cervicoisthmic pregnancy, which may be carried to term, is potentially dangerous for the pregnant woman. With ultrasonographic evaluation alone the diagnosis of a cervical pregnancy in the second trimester is difficult. CASE A nulliparous 33-year-old woman at 21 weeks' gestation was diagnosed by ultrafast T2-weighted magnetic resonance imaging (MRI) to have a cervicoisthmic pregnancy. After the infant was delivered live by cesarean with a vertical fundal incision, methotrexate was infused into the placenta via the umbilical vein. The next day she received uterine artery methotrexate infusion and embolization with platinum coils. Eight months later there was no trace of the placenta on ultrasonography or MRI. She subsequently resumed normal menstrual cycles, conceived, and delivered a healthy infant at term by cesarean after 2 years. CONCLUSION This report describes MRI and successful preservation of fertility with such an advanced cervicoisthmic pregnancy.
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Affiliation(s)
- A Itakura
- Department of Obstetrics and Gynecology, Nagoya University Hospital, Nagoya, Japan.
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33
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Than NG, Itakura A, Rao CV, Nohira T, Toth P, Mansell JP, Isaka K, Nishi H, Takayama M, Than GN. Clinical applications of pregnancy-related proteins--a workshop report. Placenta 2003; 24 Suppl A:S60-4. [PMID: 12842415 DOI: 10.1053/plac.2002.0947] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- N G Than
- First Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary.
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34
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Campos R, Szczepanik M, Itakura A, Kronenberg M, Askenase P. NKT cell-derived IL-4 is required early in allergic contact sensitivity (CS). J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)80976-4] [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: 11/17/2022]
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35
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Nakashima Y, Cho T, Fukasawa T, Higaki H, Hirata M, Hojo H, Ichimura M, Ishii K, Ishimoto Y, Islam MK, Itakura A, Ito T, Katanuma I, Kobayashi S, Kohagura J, Kubota Y, Minami R, Numakura T, Saito T, Saosaki BS, Takemura Y, Tatematsu Y, Yoshida M, Yoshikawa M, Yatsu K. Recent Results of High Density Experiments in the Gamma 10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963580] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Nakashima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Cho
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Fukasawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - H. Higaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Hirata
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Ishimoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. K. Islam
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Ito
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - S. Kobayashi
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
- Institute of Advanced of Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Kubota
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - R. Minami
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Numakura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Saito
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - B. S. Saosaki
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Tatematsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Yoshida
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan ,
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36
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Kojima A, Ishii K, Takemura Y, Hagisawa K, Itakura A, Ichimura M, Yatsu K. Development of Alfvén Ion Cyclotron Fluctuation Measurement by Use of a Gold Neutral Beam Probe in the Tandem Mirror Gamma10. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Kojima
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan
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37
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Ishii K, Takemura Y, Fueki A, Shimoo M, Tsutsui K, Hagisawa K, Kojima A, Katanuma I, Saito T, Itakura A, Yatsu K. Radial Potential Control for Plasma Confinement in the Tandem Mirror GAMMA 10. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Ishii
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - Y. Takemura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Fueki
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - M. Shimoo
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Tsutsui
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Kojima
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - I. Katanuma
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - T. Saito
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Ibaraki 305-8577, Japan ,
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38
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Itakura A, Hirai T, Hojo H, Kohagura J, Shima Y, Tsunoda S, Yoshikawa M, Yatsu K. Ultrashort-Pulse Reflectometry in the Gamma 10 Device. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T. Hirai
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - H. Hojo
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Y. Shima
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - S. Tsunoda
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
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39
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Takemura Y, Ishii K, Fueki A, Hagisawa K, Kojima A, Itakura A, Yatsu K. Measurement of Plasma Density Using a Gold Film Detector in the Inner Mirror Throat of the Gamma10 Tandem Mirror. Fusion Science and Technology 2003. [DOI: 10.13182/fst03-a11963615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Takemura
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - K. Ishii
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - A. Fueki
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - K. Hagisawa
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - A. Kojima
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - A. Itakura
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
| | - K. Yatsu
- Plasma Research Center, University of Tsukuba, Tsukuba City, Ibaraki, 305-8577, Japan
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40
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Nomura M, Tsukahara S, Ando H, Katsumata Y, Okada M, Itakura A, Nomura S, Kikkawa F, Nagasaka T, Mizutani S. Differential distribution of placental leucine aminopeptidase/oxytocinase and aminopeptidase A in human trophoblasts of normal placenta and complete hydatidiform mole. Placenta 2002; 23:631-9. [PMID: 12361682 DOI: 10.1053/plac.2002.0861] [Citation(s) in RCA: 23] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Placental leucine aminopeptidase (P-LAP)/oxytocinase (OTase) degrades several small peptides such as oxytocin (OT), arginine vasopressin (AVP) and angiotensin III (ANGIII), and aminopeptidase A (AP-A) converts angiotensin II (ANGII) to ANGIII. These proteases play an important role in foetal growth and the maintenance of human homeostasis during pregnancy. In this study, we confirmed the distribution of P-LAP and AP-A proteins and messenger RNAs in human trophoblasts in normal placenta and complete hydatidiform mole by immunohistochemical and in-situ hybridization techniques. Immunoreactivity of P-LAP was mainly noted in the apical membrane of syncytiotrophoblasts, and the expression of messenger RNA (mRNA) for P-LAP was predominantly noted in the cytoplasm of syncytiotrophoblastic cells. However, immunoreactivity of AP-A was mainly noted in the apical membrane of cytotrophoblasts and in the basal zone of the syncytiotrophoblasts, and the expression of mRNA for AP-A was predominantly noted in cytoplasm of cytotrophoblastic cells and a little in cytoplasm of syncytiotrophoblastic cells. Thereby, the two proteases were differentially distributed both in normal placenta and hydatidiform mole throughout the gestational age. These results are useful for the further understanding of not only the pathophysiology of pregnancy, but also the pathogenesis of trophoblastic diseases.
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Affiliation(s)
- M Nomura
- Department of Obstetrics and Gynecology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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41
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Kikkawa F, Kajiyama H, Ino K, Watanabe Y, Ito M, Nomura S, Itakura A, Tsujimoto M, Mizutani S. Possible involvement of placental peptidases that degrade gonadotropin-releasing hormone (GnRH) in the dynamic pattern of placental hCG secretion via GnRH degradation. Placenta 2002; 23:483-9. [PMID: 12137746 DOI: 10.1053/plac.2002.0794] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The presence of an extrahypothalamic gonadotropin releasing hormone (GnRH) in human placenta is well known and this decapeptide is presumed to play an important role in the regulation of the function and growth of human placenta. Immunohistochemistry showed that neutral endopeptidase 24.11 (NEP), a candidate of the responsible enzyme of GnRH degradation, is highly expressed on the cell surface of trophoblasts. Hydrolysis of GnRH by human villi was studied by measuring liberated amino acids using high performance liquid chromatography. The GnRH degrading activity was 1.53 times higher after incubation with the membrane fraction of first trimester villi than that after incubation with the membrane fraction of term villi. Phosphoramidon, a potent inhibitor of NEP, reduced the liberated amino acids to about a half, suggesting that NEP is a responsible enzyme for GnRH degradation. Ubenimex, which can inhibit several aminopeptidases, also reduced the liberated amino acids to about 50 per cent. O-phenanthroline, EDTA, and thiorphan could inhibit GnRH degradation but inhibitors of post proline endopeptidase could not. Furthermore, GnRH degrading activity of the membrane fraction was reduced remarkably after the membrane fraction was immunotitrated by anti NEP and anti placental leucine aminopeptidase (P-LAP) IgG. In conclusion, NEP and P-LAP are responsible enzymes for GnRH degradation in human villi.
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Affiliation(s)
- F Kikkawa
- Department of Obstetrics and Gynecology, Nagoya University School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya 466-8550, Japan
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42
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Abstract
To evaluate the significance of hepatocyte growth factor (HGF) in milk in the perinatal period, we examined immunoreactive HGF levels and bioactivity in human milk. Human milk samples were obtained from women at various postpartum ages, and the levels of HGF were measured by ELISA. In the cross sectional study, the concentration of milk HGF from term deliveries showed a significant inverse correlation with progress of lactation, whereas in cases of preterm delivery concentrations, levels remained high after a long period of lactation. In the longitudinal analysis, the contents of HGF in colostrum, transitional, and mature milk from preterm deliveries were significantly be higher than those from term deliveries. Although mature milk from term and preterm deliveries contained significantly lower levels of HGF than colostrum, high levels of HGF persisted in mature milk from preterm deliveries. After partial purification, immunoblotting analysis showed the presence of both alpha- and beta-chains of HGF. HGF in milk stimulated proliferation of rat hepatocytes in primary culture, which was inhibited by supplementation with anti-HGF antibody. Thus, a high concentration of bioactive HGF is present in human milk in the postpartum period. Our results suggest that HGF in milk acts as a trophic factor for the gastrointestinal tract in neonates.
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Affiliation(s)
- H Itoh
- Department of Obstetrics and Gynecology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Matsumoto M, Itakura A, Tanaka A, Fujisawa C, Matsuda H. Inability of IL-12 to down-regulate IgE synthesis due to defective production of IFN-gamma in atopic NC/Nga mice. J Immunol 2001; 167:5955-62. [PMID: 11698474 DOI: 10.4049/jimmunol.167.10.5955] [Citation(s) in RCA: 39] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
NC/Nga mice raised in nonsterile circumstances spontaneously suffer from atopic dermatitis-like skin lesions with IgE hyperproduction. We investigated effects of rIL-12 on the IgE production in NC/Nga mice. rIL-12 administration was successful to suppress the increase of IgE levels in BALB/c mice immunized with OVA and aluminum hydroxide, but failed to abrogate that in NC/Nga mice. Both in vivo and in vitro IFN-gamma production induced by rIL-12 was less in NC/Nga mice than in BALB/c mice. Addition of rIFN-gamma to rIL-4 and LPS completely abrogated IgE production by B cells of BALB/c mice, but was insufficient to suppress it by B cells of NC/Nga mice. In splenic cells pretreated with Con A, STAT4 was phosphorylated at the tyrosine residue by addition of rIL-12, which was more weakly inducible in NC/Nga mice than in BALB/c mice. Finally, we examined the preventive ability of rIL-12 on the clinical aspects of atopic dermatitis in NC/Nga mice. rIL-12 administration resulted in exacerbation of development of the skin lesions and IgE production in NC/Nga mice raised in nonsterile circumstances. These results suggest that defective production of IFN-gamma by T cells less sensitive to IL-12 and low responsiveness of B cells to IFN-gamma may contribute to IgE hyperproduction in NC/Nga mice, and that IL-12 may have no ability to improve the clinical aspects of NC/Nga mice.
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Affiliation(s)
- M Matsumoto
- Laboratory of Clinical Immunology, Department of Veterinary Clinic, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
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Aoshima T, Kajita M, Sekido Y, Mimura S, Itakura A, Yasuda I, Saheki T, Watanabe K, Shimokata K, Niwa T. Carbamoyl phosphate synthetase I deficiency: molecular genetic findings and prenatal diagnosis. Prenat Diagn 2001; 21:634-7. [PMID: 11536261 DOI: 10.1002/pd.123] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We report a Japanese boy who died at Day 28 of life because of severe carbamoyl phosphate synthetase I (CPS1) deficiency that was proven by enzyme assay. By analysis of cDNA and genomic DNA, he was shown to be a compound heterozygote with two point mutations of the CPS1 gene, 840G>C leading to an aberrant splicing and 1123C>T (predicting Q375X). The 840G>C was a mutation described in another Japanese family. Since his parents carried each mutation heterozygously, we performed prenatal diagnosis at 16 weeks of his mother's next gestation by multiplex PCR and melting curve analysis in a single capillary containing two-color fluorescent (LC-Red 640 and LC-Red 705) probes on LightCycler. We analyzed genomic DNA extracted from amniotic cells and found that the fetus was homozygous for the wild-type alleles. At term a healthy girl was born without hyperammonemia.
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Affiliation(s)
- T Aoshima
- Department of Pediatrics, Nagoya University School of Medicine, Nagoya, Japan
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45
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Abstract
Diaphragmatic eventration is a rare abnormality, which has the similar ultrasonographic features to congenital diaphragmatic hernia. Therefore, these two diseases are difficult to differentiate from each other prenatally. We present here a case in which the presence of congenital diaphragmatic eventration was strongly suggested by magnetic resonance imaging (MRI) and ultrasonography. A 26-year-old pregnancy woman, gravida 0, para 0, week 35, was admitted to our hospital with an ultrasonographic abnormality of the fetal thorax. MRI and ultrasonography showed interesting features which strongly suggested the presence of congenital diaphragmatic eventration and helped to differentiate it from congenital diaphragmatic hernia.
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Affiliation(s)
- Y Tsukahara
- Department of Maternity and Perinatal Care Center, Nagoya University Hospital, Japan
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46
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Itakura A, Miura Y, Hikasa Y, Kiso Y, Matsuda H. Interleukin-3 and stem cell factor modulate cell cycle regulatory factors in mast cells: negative regulation of p27Kip1 in proliferation of mast cells induced by interleukin-3 but not stem cell factor. Exp Hematol 2001; 29:803-11. [PMID: 11438202 DOI: 10.1016/s0301-472x(01)00659-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Interleukin-3 (IL-3) and stem cell factor (SCF) are able to promote survival and proliferation of mast cells. However, the precise signal transduction cascades leading to mast cell proliferation are not clearly understood. Thus, we sought to define the mechanism of mast cell proliferation induced by IL-3 and SCF. MATERIALS AND METHODS We treated murine bone marrow-derived cultured mast cells (BMCMC) with recombinant IL-3 (rIL-3) or recombinant SCF (rSCF) and examined the effects of rIL-3 and rSCF on cell cycle regulatory factors. RESULTS Both rIL-3 and rSCF suppressed apoptosis of BMCMC. rSCF induced great proliferation of BMCMC with elevation of the proportions of cells in S and G2/M phases, whereas most BMCMC incubated with rIL-3 were arrested in the G1 phase. The G1/S phase transition is initiated by phosphorylated retinoblastoma protein (pRb), which was prominent in cells stimulated with rSCF. In contrast, rIL-3 relatively increased a dephosphorylated form of pRb in BMCMC. Compared with rIL-3, rSCF induced greater expression of cyclin-dependent kinase (CDK) 2 and CDK4, which are able to phosphorylate pRb, and cyclin D3, a partner of CDK4. BMCMC treated with rIL-3 contained a high amount of a CDK inhibitor p27Kip1 that was suppressed by pretreatment with Ro31-7549, a protein kinase C inhibitor, whereas rSCF induced weak expression of p27Kip1 in BMCMC. CONCLUSION The results suggest that IL-3 and SCF exert their respective mitogenic effects on mast cells by modulating the expression of pRb, CDK, cyclin, and p27Kip1.
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Affiliation(s)
- A Itakura
- Department of Veterinary Clinic, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
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47
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Kozaki H, Itakura A, Okamura M, Ohno Y, Wakai K, Mizutani S. Maternal serum placental leucine aminopeptidase (P-LAP)/oxytocinase and preterm delivery. Int J Gynaecol Obstet 2001; 73:207-13. [PMID: 11376666 DOI: 10.1016/s0020-7292(01)00372-1] [Citation(s) in RCA: 24] [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: 10/18/2022]
Abstract
OBJECTIVE To test the applicability of maternal serum placental leucine aminopeptidase (P-LAP) as a parameter for predicting preterm delivery. PATIENTS AND METHODS Maternal serum P-LAP activity of 61 consecutive women with preterm labor at admission were assayed and examined to assess the relationship of levels to the incidence of preterm and term deliveries. RESULTS When P-LAP activity of study patient serum was at or below the 10th percentile, we found a greater ratio of preterm delivery (P=0.0085) and an approximately 2.3-fold increase risk. The sensitivity, specificity, positive predictive value and negative predictive value were 29, 97, 89 and 62%, respectively. CONCLUSION Maternal serum P-LAP activity decreases in cases with spontaneous preterm delivery and may be a clinically potential marker for some cases of preterm labor.
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Affiliation(s)
- H Kozaki
- Department of Obstetrics and Gynecology, Nagoya University School of Medicine, Nagoya, Japan
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Cho T, Kohagura J, Numakura T, Hirata M, Hojo H, Ichimura M, Ishii K, Itakura A, Katanuma I, Nakashima Y, Saito T, Tatematsu Y, Yoshikawa M, Minami R, Nagashima S, Yoshida M, Tamano T, Yatsu K, Miyoshi S. Generalized scaling laws of the formation and effects of plasma-confining potentials for tandem-mirror operations in GAMMA 10. Phys Rev Lett 2001; 86:4310-4313. [PMID: 11328162 DOI: 10.1103/physrevlett.86.4310] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2000] [Indexed: 05/23/2023]
Abstract
The main operations from 1979 to 2000 in the GAMMA 10 tandem-mirror, characterized in terms of the high-potential mode having kV-order plasma-confining potentials and the hot-ion mode yielding fusion neutrons with 10-20 keV bulk-ion temperatures, are summarized and generalized as a result of scalings of the formation and the effects of the potentials. The wide validity of potential-formation physics from Cohen's theory and the validity of the generalized Pastukhov's theory for the effects of thermal-barrier potentials on electron confinement are verified and consolidated through electron-energy balance.
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Affiliation(s)
- T Cho
- Plasma Research Centre, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Iwasaki T, Tanaka A, Itakura A, Yamashita N, Ohta K, Matsuda H, Onuma M. Atopic NC/Nga mice as a model for allergic asthma: severe allergic responses by single intranasal challenge with protein antigen. J Vet Med Sci 2001; 63:413-9. [PMID: 11346176 DOI: 10.1292/jvms.63.413] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Since certain characters of allergic asthma are common with other allergic disorders like atopic dermatitis, the possible relationship in etiology is expected. Herein, we investigated whether NC/Nga mice, an inherent animal model for human atopic dermatitis, are inclined to allergic asthma. A single intranasal challenge of NC/Nga mice immunized with ovalbumin (OVA) resulted in an increase in plasma levels of OVA-specific IgE, and typical pathological aspects of allergic asthma characterized by infiltration of numerous eosinophils, mucus hyper production of bronchial epithelial cells. Moreover, airway hyperresponsiveness to inhaled acetylcholine and marked enhancement of airway resistance after the challenge were observed as compared to control BALB/c mice. Delayed expression of mRNA of eosinophil active chemokines, interleukin-5, eotaxin, macrophage inflammatory protein-1alpha in concert with eosinophilia was determined in the lung of NC/Nga mice. These results suggest that asthmatic responses developed in NC/Nga mice challenged with OVA are very similar to human allergic asthma, and that NC/Nga mice are a useful model to elucidate various aspects of allergic asthma.
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Affiliation(s)
- T Iwasaki
- Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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50
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Mitsuhashi M, Tanaka A, Fujisawa C, Kawamoto K, Itakura A, Takaku M, Hironaka T, Sawada S, Matsuda H. Necessity of thromboxane A2 for initiation of platelet-mediated contact sensitivity: dual activation of platelets and vascular endothelial cells. J Immunol 2001; 166:617-23. [PMID: 11123345 DOI: 10.4049/jimmunol.166.1.617] [Citation(s) in RCA: 23] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To investigate the crucial role of platelet-derived thromboxane A(2) (TXA(2)) in initiating Ag-specific contact sensitivity (CS), a platelet-dependent CS model using genetically mast cell-deficient W/W(v) mice, was provided. In vivo treatment with BAYu3405, a TXA(2) receptor antagonist, markedly suppressed CS responses in a dose-dependent manner. This inhibitory effect occurred when BAYu3405 was administered before an early initiating phase, suggesting that TXA(2) may be a potent initiator of platelet-mediated CS responses. When platelets were pretreated with BAYu3405 in vitro, platelet aggregation as well as serotonin release, which is able to induce the early phase response allowing local recruitment of CS effector T cells due to direct activation of vascular endothelial cells, was inhibited. The addition of U46619, a TXA(2) agonist, or a mixture of platelets and thrombin-enhanced expression of both ICAM-1 and VCAM-1 on isolated mouse aortic endothelial cells, which was completely abolished by pretreatment with BAYu3405. Furthermore, intradermal injection of U46619 into the ear of platelet-depleted mice led to CS responses with marked expression of ICAM-1 and VCAM-1 on the vascular endothelium. These findings suggest that TXA(2) generated from platelets activated with Ag may mediate initiation of CS responses through inducing serotonin release from platelets and the subsequent aggregation and up-regulated expression of ICAM-1 and VCAM-1 on vascular endothelial cells.
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MESH Headings
- 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/administration & dosage
- Adenosine Triphosphate/antagonists & inhibitors
- Adenosine Triphosphate/metabolism
- Animals
- Aorta, Abdominal
- Aorta, Thoracic
- Blood Platelets/drug effects
- Blood Platelets/immunology
- Blood Platelets/metabolism
- Carbazoles/administration & dosage
- Cells, Cultured
- Dermatitis, Contact/blood
- Dermatitis, Contact/immunology
- Dermatitis, Contact/prevention & control
- Ear/blood supply
- Endothelium, Vascular/cytology
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/immunology
- Endothelium, Vascular/metabolism
- Humans
- Immune Sera/administration & dosage
- Injections, Intradermal
- Injections, Intraperitoneal
- Injections, Intravenous
- Intercellular Adhesion Molecule-1/biosynthesis
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Mutant Strains
- Platelet Activation/drug effects
- Platelet Activation/immunology
- Platelet Aggregation Inhibitors/administration & dosage
- Receptors, Thromboxane/antagonists & inhibitors
- Serotonin/metabolism
- Sulfonamides/administration & dosage
- Thromboxane A2/agonists
- Thromboxane A2/physiology
- Vascular Cell Adhesion Molecule-1/biosynthesis
- Vasoconstrictor Agents/administration & dosage
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Affiliation(s)
- M Mitsuhashi
- Department of Veterinary Clinic, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
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