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Setagaya, Japan

Nakashima A.,National Center for Child Health and Development | Ino N.,National Center for Child Health and Development | Kusumi M.,National Center for Child Health and Development | Ohgi S.,National Center for Child Health and Development | And 6 more authors.
Fertility and Sterility | Year: 2010

Objective: To evaluate the efficacy of a nylon mesh container in vitrification of human embryos and to determine the optimal osmotic pressure of the initial thawing solution. Design: Retrospective analysis. Setting: National Center for Child Health and Development, Tokyo, Japan. Patient(s): Infertile patients undergoing either invitro fertilization or intracytoplasmic sperminjection in our hospital. Intervention(s): Embryos, at the cleavage stage, were cryopreserved using the vitrification method in either a plastic straw or a nylon mesh container. The embryos were thawed using an initial osmotic pressure of either 0.5 M or 1.0 M sucrose with subsequent step-wise dilution. After thawing, the embryos were transferred to the uterus. Main Outcome Measure(s): Survival rate of blastomeres, embryo survival rate, implantation, and pregnancy rates, cancellation rate because of embryo damage. Result(s): Use of nylon mesh and the 1.0 M sucrose thawing solution significantly improved blastomere survival rate (98.0 ± 1.0%, mean ± SEM), pregnancy rate (41.0%) and implantation rate (32.3%). Conclusion(s): Vitrification using a nylon mesh container and subsequent thawing in a 1.0 M sucrose solution is an easy and inexpensive method that improves the reliability of embryo cryopreservation of embryos without adverse effects on clinical outcomes. © 2010 by American Society for Reproductive Medicine.

Kubota S.,Shinshu University | Yamauchi K.,University of Tsukuba | Sugano M.,Shinshu University | Kawasaki K.,Shinshu University | And 5 more authors.
Digestive Diseases and Sciences | Year: 2011

Background The trefoil factor family (TFF) 2 protein is produced by gastric gland mucous cells (GMCs), and the secreted TFF2 shares a mucosal barrier function with GMC-type mucin. Recently, we presented an enzymelinked immunosorbent assay (ELISA) method for measurement of GMC-type mucin in the gastric juice. Aims We aimed to develop an ELISA for TFF2 and to assess pathophysiological changes in the gastric surface mucous gel layer (SMGL) of patients with Helicobacter pylori infection. Methods The distribution of TFF2 and GMC-type mucin in the SMGL was immunohistochemically determined. The ELISA for TFF2 was based on a polyclonal goat antibody. Recombinant TFF2 was employed to prepare the calibrators. TFF2 and GMC-type mucin in the gastric juice in healthy individuals (n = 33) and patients with gastritis (n = 37), gastric ulcer (n = 16), and duodenal ulcer (n = 10) were assayed using ELISA. Results TFF2 and GMC-type mucin were immunohistochemically co-localized in the gastric SMGL and GMCs. The TFF2 levels in the patients were significantly higher than those in the healthy individuals. Further, the TFF2 levels in the H. pylori-positive patients were significantly higher than those in the H. pylori-negative patients, and decreased after the eradication of the infection. GMC-type mucin levels showed a tendency similar to that of TFF2 levels. Conclusions The upregulation of TFF2 and GMC-type mucin secretion may reflect the response of the gastric mucosa to H. pylori-induced injuries. TFF2 and GMC-type mucin secreted into the SMGL may protect the gastric mucosa against H. pylori. © Springer Science+Business Media, LLC 2011.

Nakagawa K.,Sugiyama Clinic | Hisano M.,National Center for Child Health and Development | Sugiyama R.,Sugiyama Clinic | Yamaguchi K.,National Center for Child Health and Development
Archives of Gynecology and Obstetrics | Year: 2016

Purpose: Follicular fluid (FF) might reflect the environment during follicle and oocyte growth, and an evaluation of oxidative stress in the FF might be useful in predicting oocyte quality. In order to measure the oxidative stress (OS) in the FF from a single follicle of patients with endometrioma (EM), we evaluated whether an EM might affect the environment of follicular growth. Methods: Between December 2011 and July 2013, 26 patients with a unilateral EM (EM group) and 29 without EM (control group) were enrolled in this study. The FF was obtained during the first puncture of follicular aspiration, and was stored at −30 °C until it was assayed. A Free Radical Elective Evaluator (WISMERLL, USA) was used to perform d-ROM and BAP tests to measure oxidative stress (U.CARR) and antioxidant power (μmol/L). Results: The d-ROM values in the EMC and control groups were 328.7 ± 97.8 and 414.9 ± 84.2, respectively, and the BAP values for the two groups were 2474.3 ± 432.0 and 2552.8 ± 435.58, respectively. These values were similar between the two groups (mean ± SD). The number of patients with a modified BAP/d-ROM ratio of <1.0 in the EM group was similar to that for the control group at 16 and 15, respectively (61.5 and 51.7 %). Conclusions: The oxidative stress and antioxidant potential in the FF of the patients with unilateral EM showed values similar to those without an EM. Therefore, we concluded that EMs do not affect the environment for follicle growth during ART treatment. © 2015, Springer-Verlag Berlin Heidelberg.

Matsumoto Y.,Shizuoka City Hospital | Kageyama S.,Kageyama Urological Clinic | Arihara K.,Ohtemachi Clinic | Sugiyama T.,Sugiyama Clinic | And 5 more authors.
Journal of the American College of Cardiology | Year: 2014

Objectives This study sought to assess whether spironolactone treatment reduces the high incidence of cardiovascular and cerebrovascular (CCV) morbidity and mortality in hemodialysis (HD) patients. Background Aldosterone receptor blockers reduce cardiac-related events, but the efficacy of the agents in HD patients is unclear. Methods A 3-year randomized trial involving 5 clinics was performed. Of the 309 oligoanuric HD patients enrolled in the study, 157 patients were randomly assigned to receive 25 mg/day of spironolactone without any restriction on dietary potassium intake (treatment group), and 152 patients were assigned to a control group. The primary outcome was a composite of death from CCV events or hospitalization for CCV events, and the secondary outcome was death from all causes. Results During the 3-year follow-up, the primary outcome occurred in 5.7% of patients in the treatment group and in 12.5% of patients in the control group. Hazard ratios (HRs) for the primary outcome for treatment were 0.404 (95% confidence interval [CI]: 0.202 to 0.809; p = 0.017) and 0.379 (95% CI: 0.173 to 0.832; p = 0.016) before and after adjustment, respectively. The secondary outcome was significantly reduced in the treatment group compared with the control group (6.4% vs. 19.7%; HRs: 0.355 [95% CI: 0.191 to 0.662; p = 0.002] and 0.335 [95% CI: 0.162 to 0.693; p = 0.003] before and after adjustment, respectively). Gynecomastia or breast pain was reported in 16 patients (10.2%) in the treatment group. Serious hyperkalemia led to treatment discontinuation in 3 patients (1.9%). Conclusions Aldosterone receptor blockade using spironolactone may substantially reduce the risk of both CCV morbidity and death among HD patients; however, larger-scale studies are recommended to further confirm its efficacy. (Effects of Spironolactone on Cardio- and Cerebrovascular Morbidity and Mortality in Hemodialysis Patients; NCT01687699) © 2014 by the American College of Cardiology Foundation.

Nakagawa K.,Sugiyama Clinic | Ojiro Y.,Sugiyama Clinic | Jyuen H.,Sugiyama Clinic | Nishi Y.,Sugiyama Clinic | And 3 more authors.
Journal of Obstetrics and Gynaecology Research | Year: 2014

Aim: To determine the efficacy of prostaglandin administration during the proliferative phase in order to improve pregnancy rates following frozen embryo transfer during a hormone replacement cycle (HRC). Methods: From September 2010 through March 2012, patients (n = 135) were recruited who had undergone oocyte retrieval during a stimulation cycle with clomiphene and had deferred fresh embryo transfer (ET) due to a thin uterine endometrium. All patients were less than 40 years of age and underwent thawed ET following all embryo cryopreservation, and were randomly divided into two groups for thawed ET using a conventional hormone replacement cycle with or without prostaglandin derivatives (prostaglandin or conventional group). Prostaglandin derivatives were administrated during the proliferative phase. Pregnancy and implantation rates following frozen ET were compared between the two groups. Results: Although the endometrial thickness on the day of ET was similar for the prostaglandin and conventional groups, the pregnancy and implantation rates for the prostaglandin group were 40.0% and 22.0%, respectively, which was significantly higher than the rates for the conventional group (P < 0.01). Conclusion: Among patients who avoided fresh ET due to a thin endometrium, the pregnancy rate following a thawed cycle was low. However, it was improved when prostaglandin derivatives were used during the proliferative phase. © 2014 Japan Society of Obstetrics and Gynecology.

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