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Tanaka A, Nagayoshi M, Tanaka I. PGD or natural conception? what is recommended for couples with recurrent miscarriages caused by translocation chromosomal aberrations? Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tanaka A, Nagayoshi M, Tanaka I, Kusunoki H. Differentiation of human round spermatids into motile spermatozoa through in vitro coculture with vero cells. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Awata S, Tanaka A, Nagayoshi M, Sasaki M, Tanaka I. PGD or natural conception? what is recommended for couples with recurrent miscarriages caused by translocation chromosomal aberrations? Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nagayoshi M, Tanaka A, Awata S, Tanaka I, Kusunoki H, Watanabe S. When does chromosomal mosaicism occur throughout human embryonic development? Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kusunoki H, Tanaka A, Nagayoshi M, Awata S, Tanaka I, Watanabe S. Are craters on the surface of human sperm heads physiological changes during spermiogenesis? Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Awata S, Tanaka A, Nagayoshi M, Sasaki M, Tanaka I. Selection of an optimal controlled ovarian hyperstimulation method in relation to the number of antral follicles in patients less than 40 years old. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Tanaka A, Nagayoshi M, Awata S, Tanaka I, Kusunoki H, Watanabe S. A promising nuclear transfer technique for repairing aged oocytes. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Tanaka A, Nagayoshi M, Awata S, Sasaki M, Tanaka I, Kusunoki H. Direct visualization of metaphase-II chromosomes in human oocytes under an inverted microscope. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tanaka A, Nagayoshi M, Awata S, Sasaki M, Tanaka I. Retrospective health study on 278 babies conceived following cryopreserved spermatid injection into an electrically stimulated oocyte. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Tanaka A, Nagayoshi M, Awata S, Tanaka I. Selection of an optimal controlled ovarian hyperstimulation method in relation to the number of antral follicles in patients less than 40 years old. Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.1585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tanaka A, Nagayoshi M, Awata S, Tanaka I, Kusunoki H, Watanabe S. Are crater defects in human sperm heads physiological changes during spermiogenesis? Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.1308] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tanaka A, Nagayoshi M, Awata S, Tanaka I, Kusunoki H, Watanabe S. A new assay system for distinction between a balanced translocation and a normal karyotype in preimplantation genetic diagnosis (PGD). Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tanaka A, Nagayoshi M, Awata S, Tanaka I. The risk of spermatid injection into an electrically stimulated oocytes. Reproductive health study on 251 new born babies. Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tanaka A, Nagayoshi M, Awata S, Himeno N, Tanaka I. The risk of cryopreserved spermatid injection into an electrically stimulated oocyte. Reproductive health study on 189 new born babies. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tanaka A, Nagayoshi M, Awata S, Himeno N, Tanaka I. Improvement of a photodynamic system for observation of seminiferous tubules in microdissection-testicular sperm extraction (MD-TESE). Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.1255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tanaka A, Nagayoshi M, Awata S, Himeno N, Tanaka I. Rescue of in-vitro matured oocytes following metaphase-II nuclear transfer in humans. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.1251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tanaka A, Nagayoshi M, Awata S, Himeno N, Tanaka I. Identification of crater defects in human sperm heads – origin and species specificity. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yamamoto KK, Miyata T, Momose T, Nagayoshi M, Akagi D, Hosaka A, Miyahara T, Ishii S, Kimura H, Deguchi J, Shigematsu K, Shigematsu H, Nagawa H. Reduced vascular reserve measured by stressed single photon emission computed tomography carries a high risk for stroke in patients with carotid stenosis. INT ANGIOL 2006; 25:385-8. [PMID: 17164745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
AIM A few studies have observed reduced vascular reserve measured by single photon emission computed tomography (SPECT) to be a risk factor for stroke in patients with carotid artery occlusion, but stenosis has been excluded from these former studies. This study has evaluated the prognosis of reduced vascular reserve in patients with stenosis, and the effect of carotid endarterectomy (CEA) on these patients. METHODS Forty patients diagnosed as having >70% stenosis of the carotid artery at the University of Tokyo Hospital, between 2001 and 2004, underwent acetazolamide-stress SPECT test first. A resting SPECT study was performed on a different day from the stressed SPECT study. The patients were grouped as having reduced vascular reserve or normal vascular reserve from the SPECT results. Analysis of risk factors and the stroke-free curve analysis for reduced vascular reserve was performed. RESULTS Of the 40 patients, 24 (60%) had reduced vascular reserve and 18 underwent CEA. The mean follow-up period was 21.5+/-15.5 months (mean+/-SD). Four strokes occurred during follow-up: in 1 patient with CEA and 3 without CEA. All stroke patients had reduced vascular reserve. The patients with reduced vascular reserve without any surgery had a significantly lower stroke-free rate compared with those with normal vascular reserve or reduced vascular reserve, but also receiving CEA. CONCLUSIONS We propose performing SPECT tests in patients with severe carotid stenosis regardless of symptoms, and performing CEA on those with a reduction in vascular reserve.
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Tanaka A, Nagayoshi M, Awata S, Himeno N, Kusunoki H, Tanaka I. P-987. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.1384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Tanaka A, Tanaka I, Nagayoshi M, Awata S, Himeno N, Kusunoki H. P-113. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Tanaka A, Tanaka I, Nagayoshi M, Awata S, Himeno N, Kusunoki H. P-112. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yamamoto K, Miyata T, Nagayoshi M, Akagi D, Hosaka A, Miyahara T, Ishii S, Shigematsu K, Shigematsu H, Nagawa H. Carotid endarterectomy may reduce the high stroke rate for patients with the disease of abdominal aorta and peripheral arteries. INT ANGIOL 2006; 25:35-9. [PMID: 16520722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
AIM The prevalence of carotid stenosis is reported to be high among patients with arteriosclerosis, but the hazards of carotid stenosis and the benefits of carotid endarterectomy (CEA) on long-term event-free survival are still unknown. The aim of this prospective study was to screen preoperative patients with arterial disease for carotid stenosis, and to determine whether CEA had any effect on stroke during the postoperative follow-up period. METHODS From 1999 to 2003, 406 consecutive preoperative patients with arterial disease underwent routine carotid duplex scan. Patients with known carotid stenosis and those due to undergo operation in emergency were excluded from the study. CEA was performed before or simultaneously with vascular surgery if necessary. The prevalence and risk factors for carotid stenosis were studied, and the patients were followed up for stroke or death. RESULTS Among the 406 patients examined, 19.4% had greater than 50% stenosis and 11.3% had greater than 70% stenosis. The risk factors for carotid stenosis were having occlusive arterial disease (P=0.0001), and history of stroke (P=0.0038). Long-term follow-up study revealed that patients with greater than 70% carotid stenosis without CEA had a higher tendency for stroke or death, but the stroke rate in patients with severe stenosis who underwent CEA remained low, as in patients with less than 70% stenosis. CONCLUSIONS Patients with greater than 70% carotid stenosis, diagnosed before arterial operation who did not undergo CEA, had a higher risk for stroke during the postoperative follow-up period. However, their risk could be reduced by performing CEA before or simultaneously with scheduled vascular surgery.
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Arita M, Nagayoshi M, Fukuizumi T, Okinaga T, Masumi S, Morikawa M, Kakinoki Y, Nishihara T. Microbicidal efficacy of ozonated water against Candida albicans adhering to acrylic denture plates. ACTA ACUST UNITED AC 2005; 20:206-10. [PMID: 15943763 DOI: 10.1111/j.1399-302x.2005.00213.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIMS Ozone is known to act as a strong antimicrobial agent against bacteria, fungi, and viruses. We examined the effect of ozonated water on Candida albicans on acrylic denture plate. METHODS The heat-cured acrylic resins were cultured with C. albicans. After treatment of flowing ozonated water, the number of attached C. albicans was counted. In some experiments, the test samples were treated with ozonated water in combination with ultrasonication. RESULTS After exposure to flowing ozonated water (2 or 4 mg/l) for 1 min, viable C. albicans cells were nearly nonexistent. The combination of ozonated water and ultrasonication had a strong effect on the viability of C. albicans adhering to the acrylic resin plates. There were no significant differences in antimicrobial activity against C. albicans between plates immersed in ozonated water with ultrasonication and those treated with commercially available denture cleaners. In addition, electron microscopic analysis revealed that small amounts of C. albicans remained on the plate after exposure to flowing ozonated water or immersion in ozonated water with ultrasonication. CONCLUSION Our results suggest that application of ozonated water may be useful in reducing the number of C. albicans on denture plates.
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Nagayoshi M, Fukuizumi T, Kitamura C, Yano J, Terashita M, Nishihara T. Efficacy of ozone on survival and permeability of oral microorganisms. ACTA ACUST UNITED AC 2004; 19:240-6. [PMID: 15209994 DOI: 10.1111/j.1399-302x.2004.00146.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
In the present study, we examined the effect of ozonated water on oral microorganisms and dental plaque. Almost no microorganisms were detected after being treated with ozonated water (4 mg/l) for 10 s. To estimate the ozonated water-treated Streptococcus mutans, bacterial cells were stained with LIVE/DEAD BacLight Bacterial Viability Kit. Fluorescence microscopic analysis revealed that S. mutans cells were killed instantaneously in ozonated water. Some breakage of ozonated water-treated S. mutans was found by electron microscopy. When the experimental dental plaque was exposed to ozonated water, the number of viable S. mutans remarkably decreased. Ozonated water strongly inhibited the accumulation of experimental dental plaque in vitro. After the dental plaque samples from human subjects were exposed to ozonated water in vitro, almost no viable bacterial cells were detected. These results suggest that ozonated water should be useful in reducing the infections caused by oral microorganisms in dental plaque.
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Kaieda M, Nagayoshi M, Hama S, Kondo A, Fukuda H. Enantioselective transesterification using immobilized Aspergillus oryzae overexpressing lipase. Appl Microbiol Biotechnol 2004; 65:301-5. [PMID: 15052375 DOI: 10.1007/s00253-004-1590-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2003] [Revised: 01/24/2004] [Accepted: 02/06/2004] [Indexed: 11/25/2022]
Abstract
In the present study, we used gene manipulation to construct a recombinant Aspergillus oryzae strain overexpressing lipase and investigated its application to the optical resolution of chiral compounds. A. oryzae niaD300, which was derived from the wild-type strain RIB40, was used as the host strain. The tglA gene, which encodes a triacylglycerol lipase, was cloned from the A. oryzae niaD300 chromosomal genome, then reintroduced, with and without a secretion-signal sequence, into the genome and expressed under the control of the improved glaA promoter of plasmid pNGA142. The resulting recombinant strain overexpressing A. oryzae lipase was immobilized within biomass-support particles and used as a whole-cell biocatalyst. The immobilized lipase-overexpressing strain with secretion-signal sequence showed high activity and was used to selectively synthesize (R)-1-phenylethyl acetate from (RS)-1-phenylethanol and vinyl acetate. After 48 h reaction at 30 degrees C with molecular sieve 4A, the yield and enantiomeric excess (%ee) of (R)-1-phenylethyl acetate reached approximately 90 and 95%ee, respectively. The whole-cell biocatalyst for optical resolution of chiral compounds produced in this study maintained its activity over 25 batch-reaction cycles.
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