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Jwa SC, Tamaru S, Takamura M, Namba A, Kajihara T, Ishihara O, Kamei Y. Assisted reproductive technology-associated risk factors for placenta accreta spectrum after vaginal delivery. Sci Rep 2024; 14:7454. [PMID: 38548810 PMCID: PMC10978827 DOI: 10.1038/s41598-024-57988-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 03/24/2024] [Indexed: 04/01/2024] Open
Abstract
This study aimed to investigate assisted reproductive technology (ART) factors associated with placenta accreta spectrum (PAS) after vaginal delivery. This was a registry-based retrospective cohort study using the Japanese national ART registry. Cases of live singleton infants born via vaginal delivery after single embryo transfer (ET) between 2007 and 2020 were included (n = 224,043). PAS was diagnosed in 1412 cases (0.63% of deliveries), including 1360 cases (96.3%) derived from frozen-thawed ET cycles and 52 (3.7%) following fresh ET. Among fresh ET cycles, assisted hatching (AH) (adjusted odds ratio [aOR], 2.5; 95% confidence interval [CI] 1.4-4.7) and blastocyst embryo transfer (aOR, 2.2; 95% CI 1.3-3.9) were associated with a significantly increased risk of PAS. For frozen-thawed ET cycles, hormone replacement cycles (HRCs) constituted the greatest risk factor (aOR, 11.4; 95% CI 8.7-15.0), with PAS occurring in 1.4% of all vaginal deliveries following HRC (1258/91,418 deliveries) compared with only 0.11% following natural cycles (55/47,936). AH was also associated with a significantly increased risk of PAS in frozen-thawed cycles (aOR, 1.2; 95% CI 1.02-1.3). Our findings indicate the need for additional care in the management of patients undergoing vaginal delivery following ART with HRC and AH.
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Affiliation(s)
- Seung Chik Jwa
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan.
- Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Masashi Takamura
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Akira Namba
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Takeshi Kajihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan
- Kagawa Nutrition University, Saitama, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Saitama, 350-0495, Japan
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Jwa SC, Takahashi H, Tamaru S, Takamura M, Namba A, Kajihara T, Ishihara O, Kamei Y. Assisted reproductive technology-associated risk factors for retained products of conception. Fertil Steril 2024; 121:470-479. [PMID: 38036239 DOI: 10.1016/j.fertnstert.2023.11.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/02/2023]
Abstract
OBJECTIVE To evaluate assisted reproductive technology-associated risk factors for retained products of conception among live births. DESIGN Registry-based retrospective cohort study. SETTING Not applicable. PATIENT(S) Cycle-specific data for a total of 369,608 singleton live births after fresh and frozen-thawed embryo transfers (FETs) between 2007 and 2017 were obtained from the Japanese assisted reproductive technology registry. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Retained products of conception after delivery. Odds ratios and 95% confidence intervals for risk factors associated with retained products of conception during fresh and frozen cycles. RESULT(S) In total, 132 deliveries (0.04% of eligible assisted reproductive technology registry deliveries) had retained products of conception; 122 (92.4%) of these deliveries occurred after FET transfer cycles. Cases with retained products of conception were significantly more likely to have undergone vaginal delivery than cases without retained products of conception (78.0% vs. 61.1%); they were also more likely to have been complicated with the placenta accreta spectrum (24.2% vs. 0.45%). Among patients undergoing FETs, factors associated with a significantly increased risk of retained products of conception were embryo stage at transfer, use of hormone replacement cycles, and assisted hatching. Use of hormone replacement cycles represented the largest risk factor (adjusted odds ratio, 4.9; 95% confidence interval, 2.0-12.4), such that retained products of conception occurred in 0.05% (51 of 97,958) of deliveries after hormone replacement cycles but only 0.01% (5 of 47,079) of deliveries after natural cycles. Subgroup analysis showed that hormone replacement cycles and assisted hatching remained significant risk factors for retained products of conception in cases without polycystic ovary syndrome and anovulation and cases with vaginal delivery, but not cases with cesarean section. Among fresh embryo transfers, an increased number of retrieved oocytes was the only significant risk factor for retained products of conception. CONCLUSION(S) Our analyses demonstrated that most of the cases involving retained products of conception were derived from FETs, and we identified the use of hormone replacement cycles as the largest risk factor for retained products of conception within this group.
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Affiliation(s)
- Seung Chik Jwa
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan; Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan.
| | - Hironori Takahashi
- Department of Obstetrics and Gynecology, Jichi Medical University, Tochigi, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Masashi Takamura
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Akira Namba
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Takeshi Kajihara
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan; Clinical Medicine, Kagawa Nutrition University, Saitama, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
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Takano N, Takamura M, Mizuno Y, Mizuno Y, Tamaru S, Nakamura K, Soma H, Kajihara T. Genetic and histological analysis intraplacental choriocarcinoma: a case report. Med Mol Morphol 2024:10.1007/s00795-024-00382-3. [PMID: 38421457 DOI: 10.1007/s00795-024-00382-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/18/2024] [Indexed: 03/02/2024]
Abstract
We report on single case of intraplacental choriocarcinoma (IC) coexisting with feto-maternal hemorrhage from our hospital, a rare malignant tumor that occurs in the chorionic villous trophoblast. To investigate genetic and epigenetic changes to the carcinogenesis of IC, we employed cancer gene panel analysis and whole methylation analysis from a recent case of IC. By Short Tandem Repeats analysis, we confirmed that the tumor of present IC was derived from concurrent normal chorionic villous trophoblast cells. No mutation was found in 145 cancer-related genes. Meanwhile, amplification in MDM2 gene was observed. Furthermore, we observed deferentially methylated CpG sites between tumor and surrounding normal placenta in present IC case. These observations suggest that IC might be arisen as a result of aberrations of methylation rather than of DNA mutations. Further studies are needed to clarify association between aberrant methylation and choriocarcinogenesis.
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Affiliation(s)
- Natsuko Takano
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Masashi Takamura
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Yosuke Mizuno
- Division of Morphological Science, Biomedical Research Center, Saitama Medical University, Saitama, Japan
| | - Yumi Mizuno
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
- Division of Experimental Animal, Biomedical Research Center, Saitama Medical University, Saitama, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Kohei Nakamura
- Genomics Unit, Keio Cancer Center, Keio University School of Medicine, Tokyo, Japan
- Department of Obstetrics and Gynecology, Kumagaya General Hospital, Saitama, Japan
| | - Hiroaki Soma
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Takeshi Kajihara
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan.
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Tamaru S. Modification of transformer coupled permeameter for frequency extension. Rev Sci Instrum 2023; 94:073901. [PMID: 37449895 DOI: 10.1063/5.0143265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 07/01/2023] [Indexed: 07/18/2023]
Abstract
A broadband and high-sensitivity permeability measurement system that covers 10 MHz-20 GHz was previously developed and named the transformer coupled permeameter (TC-Perm). This paper describes the modifications of the TC-Perm system to further extend the operation frequency range on both the high and low frequency sides. In the previous system, the high frequency limit was set by a large notch appearing at around 22 GHz, which was considered to be caused by the excitation of two unwanted modes. In the new system, the jig design was modified to have a back ground plane and vias to suppress these unwanted modes, which resulted in a clean transmission characteristic over the entire frequency range up to 44 GHz. The low frequency limit is determined by the noise figure (NF) of the vector network analyzer input, which was measured to be ∼35 dB in the previous system configuration. The new system employed a low noise amplifier and analog switches to improve the NF to be 2.7 dB below 100 MHz. As a result of these modifications, the operation frequency range of the new TC-Perm system was extended to cover 1 MHz-44 GHz, which is sufficient for characterizing magnetic materials used in noise suppression sheets targeting fifth-generation millimeter-wave (5G mmWave) wireless communication.
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Affiliation(s)
- S Tamaru
- Reserach Center for Emerging Computing Technologies (RCECT), National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
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Takahashi K, Samura O, Hasegawa A, Okubo H, Morimoto K, Horiya M, Okamoto A, Ochiai D, Tanaka M, Sekiguchi M, Miyasaka N, Suzuki Y, Tabata T, Hayata E, Nakata M, Suzuki T, Nishi H, Toda Y, Tanigaki S, Furuya N, Hasegawa J, Tamaru S, Kamei Y, Sayama S, Nagamatsu T, Takahashi YO, Kitagawa M, Arakaki T, Sekizawa A. COVID-19 mRNA vaccination status and concerns among pregnant women in Japan: a multicenter questionnaire survey. BMC Pregnancy Childbirth 2023; 23:332. [PMID: 37161480 PMCID: PMC10169175 DOI: 10.1186/s12884-023-05669-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/03/2023] [Indexed: 05/11/2023] Open
Abstract
BACKGROUND mRNA vaccination is an effective, safe, and widespread strategy for protecting pregnant women against infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. However, information on factors such as perinatal outcomes, safety, and coverage of mRNA vaccinations among pregnant women is limited in Japan. Therefore, this study aimed to investigate the perinatal outcomes, coverage, adverse effects, and short-term safety of mRNA vaccination as well as vaccine hesitancy among pregnant women. METHODS We conducted a multicenter online survey of postpartum women who delivered their offspring at 15 institutions around Tokyo from October 2021 to March 2022. Postpartum women were divided into vaccinated and unvaccinated groups. Perinatal outcomes, COVID-19 prevalence, and disease severity were compared between the two groups. Adverse reactions in the vaccinated group and the reasons for being unvaccinated were also investigated retrospectively. RESULTS A total of 1,051 eligible postpartum women were included. Of these, 834 (79.4%) had received an mRNA vaccine, while 217 (20.6%) had not, mainly due to concerns about the effect of vaccination on the fetus. Vaccination did not increase the incidence of adverse perinatal outcomes, including fetal morphological abnormalities. The vaccinated group demonstrated low COVID-19 morbidity and severity. In the vaccinated group, the preterm birth rate, cesarean section rate, and COVID-19 incidence were 7.2%, 33.2%, and 3.3%, respectively, compared with the 13.7%, 42.2%, and 7.8% in the unvaccinated group, respectively. Almost no serious adverse reactions were associated with vaccination. CONCLUSIONS mRNA vaccines did not demonstrate any adverse effects pertaining to short-term perinatal outcomes and might have prevented SARS-CoV-2 infection or reduced COVID-19 severity. Concerns regarding the safety of the vaccine in relation to the fetus and the mother were the main reasons that prevented pregnant women from being vaccinated. To resolve concerns, it is necessary to conduct further research to confirm not only the short-term safety but also the long-term safety of mRNA vaccines.
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Affiliation(s)
- Ken Takahashi
- Department of Obstetrics and Gynecology, The Jikei University Hospital, 3-19-18 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8471, Japan
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan
| | - Osamu Samura
- Department of Obstetrics and Gynecology, The Jikei University Hospital, 3-19-18 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8471, Japan.
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan.
| | - Akihiro Hasegawa
- Department of Obstetrics and Gynecology, The Jikei University Hospital, 3-19-18 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8471, Japan
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan
| | - Haruna Okubo
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan
- Department of Obstetrics and Gynecology, The Jikei University Katsushika Medical Center, 6-41-2 Aoto, Katsushika-Ku, Tokyo, 125-8506, Japan
| | - Keiji Morimoto
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan
- Department of Obstetrics and Gynecology, The Jikei University Daisan Hospital, 4-11-1 Izumihonmachi, Komae, Tokyo, 201-8601, Japan
| | - Madoka Horiya
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan
- Department of Obstetrics and Gynecology, The Jikei University Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa City, Chiba, 277-8567, Japan
| | - Aikou Okamoto
- Department of Obstetrics and Gynecology, The Jikei University Hospital, 3-19-18 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8471, Japan
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan
| | - Daigo Ochiai
- Department of Obstetrics and Gynecology, Keio University Hospital, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Mamoru Tanaka
- Department of Obstetrics and Gynecology, Keio University Hospital, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Masaki Sekiguchi
- Department of Obstetrics and Gynecology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Naoyuki Miyasaka
- Department of Obstetrics and Gynecology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan
| | - Yuto Suzuki
- Department of Obstetrics and Gynecology, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku, Tokyo, 162-8666, Japan
| | - Tsutomu Tabata
- Department of Obstetrics and Gynecology, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku, Tokyo, 162-8666, Japan
| | - Eijiro Hayata
- Department of Obstetrics and Gynecology, Toho University Omori Medical Center, 6-11-1 Omorinishi, Ota-Ku, Tokyo, 143-8541, Japan
| | - Masahiko Nakata
- Department of Obstetrics and Gynecology, Toho University Omori Medical Center, 6-11-1 Omorinishi, Ota-Ku, Tokyo, 143-8541, Japan
| | - Tomoo Suzuki
- Department of Obstetrics and Gynecology, Tokyo Medical University, 6-7-1 Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Hirotaka Nishi
- Department of Obstetrics and Gynecology, Tokyo Medical University, 6-7-1 Nishi-Shinjuku, Shinjuku-Ku, Tokyo, 160-0023, Japan
| | - Yumi Toda
- Department of Obstetrics and Gynecology, Kyorin University Hospital, 6-20-2 Shinkawa, Mitaka City, Tokyo, 181-8611, Japan
| | - Shinji Tanigaki
- Department of Obstetrics and Gynecology, Kyorin University Hospital, 6-20-2 Shinkawa, Mitaka City, Tokyo, 181-8611, Japan
| | - Natsumi Furuya
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine Hospital, 2-16-1 Sugao, Miyamae-Ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Junichi Hasegawa
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine Hospital, 2-16-1 Sugao, Miyamae-Ku, Kawasaki City, Kanagawa, 216-8511, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University Hospital, 38 Morohongo, Moroyama-Machi, Iruma-Gun, Saitama, 350-0495, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Saitama Medical University Hospital, 38 Morohongo, Moroyama-Machi, Iruma-Gun, Saitama, 350-0495, Japan
| | - Seisuke Sayama
- Department of Obstetrics and Gynecology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Takeshi Nagamatsu
- Department of Obstetrics and Gynecology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | | | | | - Tatsuya Arakaki
- Department of Obstetrics and Gynecology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-Ku, Tokyo, 142-8666, Japan
| | - Akihiko Sekizawa
- Department of Obstetrics and Gynecology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-Ku, Tokyo, 142-8666, Japan
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Miyazaki K, Jwa SC, Katayama E, Tamaru S, Ishihara O, Kamei Y. Postoperative C-reactive protein as a predictive marker for surgical site infection after cesarean section: Retrospective analysis of 748 patients at a Japanese academic institution. PLoS One 2022; 17:e0273683. [PMID: 36083881 PMCID: PMC9462722 DOI: 10.1371/journal.pone.0273683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 08/13/2022] [Indexed: 11/18/2022] Open
Abstract
Surgical site infection (SSI) is a common but potentially serious maternal complication of cesarean section (CS). C-reactive protein (CRP) can be used in early detection of SSI. However, its predictive value for post-cesarean SSI has never been investigated. This study aims to evaluate the predictive value of CRP for the development of SSI. This was a hospital-based retrospective cohort study of 748 pregnant women who underwent CS at our university hospital between January 2017 and December 2019. CRP was measured on postoperative days 1, 3, and 6. The predictive values of CRP for SSI were evaluated using receiver operating characteristics analysis. Forty-seven (6.3%) patients developed SSI, of whom 38 (80.9%) underwent emergency CS. Serum CRP levels were significantly higher in the SSI group than in the non-SSI group from postoperative day 1 (64 vs. 81 mg/L, p = 0.001); the difference became more evident on postoperative days 3 and 6. The area under the receiver operating characteristic curve (AUC) for CRP on days 1, 3, and 6 was 0.58 (95% confidence interval [CI], 0.49 to 0.68), 0.70 (0.62 to 0.78) and 0.73 (0.65 to 0.81), respectively. The optimal cutoff value for day 3 and 6 CRP was 66.4 mg/L (sensitivity = 76.1% and specificity = 54.4%) and 22.2 mg/L (sensitivity = 76.5% and specificity = 63.2%), respectively. CRP on postoperative days 3 and 6 can be used as a predictive marker for the development of SSI after CS. Further studies to validate the predictive value in different populations is essential.
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Affiliation(s)
- Kazuko Miyazaki
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Seung Chik Jwa
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
- * E-mail:
| | - Eri Katayama
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Saitama Medical University, Saitama, Japan
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Jwa SC, Namba A, Tamaru S, Kuwahara A, Sago H, Ishihara O, Kamei Y. Down syndrome live births following assisted reproductive technology in Japan: a nationwide survey between 2007 and 2016. J Assist Reprod Genet 2022; 39:1625-1631. [PMID: 35597856 DOI: 10.1007/s10815-022-02501-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/15/2022] [Indexed: 11/26/2022] Open
Abstract
PURPOSE The use of assisted reproductive technology (ART) and prenatal genetic testing have become more widespread in line with an increase in maternal age. However, the effect of the introduction of non-invasive prenatal testing (NIPT) in April 2013 on pregnancy outcomes in Japan, including the prevalence of Down syndrome live births following ART, has not been investigated. This study aimed to evaluate the trends in the prevalence of Down syndrome live births following ART in Japan. METHODS This population-based retrospective study used the Japanese nationwide ART registry. All clinical pregnancies resulting in live births, stillbirths, and termination of pregnancy (TOP) following ART from 2007 to 2016 were included. Pregnancy outcomes involving infants with Down syndrome were evaluated. RESULTS Among 351,808 pregnancies, the proportion of mothers with advanced age increased significantly from 2007 to 2016 (from 49.5 to 62.4% and 8.9 to 17.8% for mothers aged ≥ 35 and ≥ 40 years, respectively). The proportion of live births with Down syndrome was 77.3% in 2007, which remained consistent until 2012, but then decreased significantly to 45.1% after 2013 (P < 0.001). The prevalence of Down syndrome live births increased up to 2012 (19.5/10,000 live births), decreased significantly in 2013 (12.1/10,000 live births), and then remained almost stable (11.1-14.7/10,000 live births). CONCLUSION The introduction of NIPT balanced the prevalence of Down syndrome live births following ART with recent increasing maternal age in Japan.
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Affiliation(s)
- Seung Chik Jwa
- Department of Obstetrics and Gynecology, Saitama Medical University, 38, Morohongo, Moroyama, Saitama, 350-0495, Japan.
| | - Akira Namba
- Department of Obstetrics and Gynecology, Saitama Medical University, 38, Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University, 38, Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Akira Kuwahara
- Department of Obstetrics and Gynecology, Graduate School of Biomedical Sciences, Tokushima University, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
| | - Haruhiko Sago
- Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo, 157-8535, Japan
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38, Morohongo, Moroyama, Saitama, 350-0495, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Saitama Medical University, 38, Morohongo, Moroyama, Saitama, 350-0495, Japan
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Tamaru S, Jwa SC, Ono Y, Seki H, Matsui H, Fujii T, Iriyama T, Doi K, Sameshima H, Naruse K, Kobayashi H, Yoshida R, Nishi H, Hirata Y, Fukushima K, Hirakawa T, Nakano Y, Asakawa Y, Tsunoda Y, Oda T, Nii S, Fujii T, Kinoshita K, Kamei Y. Feasibility of a mobile cardiotocogram device for fetal heart rate self-monitoring in low-risk singleton pregnant women. J Obstet Gynaecol Res 2021; 48:385-392. [PMID: 34866285 DOI: 10.1111/jog.15118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/18/2021] [Accepted: 11/26/2021] [Indexed: 11/30/2022]
Abstract
AIM This study aimed to clarify the feasibility of a mobile cardiotocogram (CTG) device for self-monitoring fetal heart rate (FHR) in low-risk singleton pregnant women. METHODS This study was conducted at six university hospitals and seven maternity clinics in Japan. Using a mobile cardiotocogram device (iCTG, Melody International Ltd., Kagawa, Japan), participants of more than 34 gestational weeks measured the FHR by themselves at least once a week until hospitalization for delivery. We evaluated the acquisition rate of evaluable FHR recordings and the frequency of abnormal FHR patterns according to the CTG classification system of the Japan Society of Obstetrics and Gynecology (JSOG). The participants also underwent a questionnaire survey after delivery to evaluate their satisfaction level of self-monitoring FHR using the mobile CTG device. RESULTS A total of 1278 FHR recordings from 101 women were analyzed. Among them, 1276 (99.8%) were readable for more than 10 min continuously, and the median percentage of the total readable period in each recording was 98.9% (range, 51.4-100). According to the JSOG classification system, 1245 (97.6%), 9 (0.7%), 18 (1.4%), and four (0.3%) FHR patterns were classified as levels 1, 2, 3, and 4, respectively. The questionnaire survey revealed high participant satisfaction with FHR self-monitoring using the iCTG. CONCLUSION The mobile CTG device is a feasible tool for self-monitoring FHR, with a high participant satisfaction level.
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Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Seung Chik Jwa
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Yoshihisa Ono
- Department of Obstetrics and Gynecology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Hiroyuki Seki
- Department of Obstetrics and Gynecology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Haruka Matsui
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Fujii
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takayuki Iriyama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Koutarou Doi
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hiroshi Sameshima
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Katsuhiko Naruse
- Department of Obstetrics and Gynecology, Faculty of Medicine, Nara Medical University, Nara, Japan
| | - Hiroshi Kobayashi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Nara Medical University, Nara, Japan
| | - Rie Yoshida
- Department of Obstetrics and Gynecology, Faculty of Medicine, Tokyo Medical University, Tokyo, Japan
| | - Hirotaka Nishi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Tokyo Medical University, Tokyo, Japan
| | | | | | | | | | | | | | | | - Shigeru Nii
- Shiroko Women's Hospital, Suzuka-shi, Mie, Japan
| | | | | | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
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9
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Yamaguchi T, Tamaru S, Takano N, Sato K, Sakurai H, Ohashi H, Kamei Y. Hypoplasia of abdominal wall muscles following massive fetal persistent chylous ascites without anemia. Oxf Med Case Reports 2021; 2021:omab039. [PMID: 34158955 PMCID: PMC8212683 DOI: 10.1093/omcr/omab039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 01/09/2021] [Accepted: 03/27/2021] [Indexed: 11/14/2022] Open
Abstract
Abdominal wall hypoplasia is a widely known clinical finding of genetic disorders such as the prune belly syndrome. On the other hand, there are few cases of abdominal wall muscle hypoplasia associated with fetal ascites due to fetal hydrops caused by fetal anemia have been reported. We report a case of fetal chylous ascites without anemia, resulting in abdominal wall muscle hypoplasia and flabby skin. At 17 weeks of gestation, fetal ascites was first detected and deteriorated without anemia. At 28, 33 and 36 weeks of gestation, paracentesis was performed three times because of cardiovascular impairment, confirming chylous ascites. After birth, the baby exhibited a flabby skin and lateral abdominal wall hypoplasia, resulting in difficulties in maintaining a sitting posture at 10 months of age. The genetic test using the TruSight One Sequencing Panels found no genetic variants. This case suggests that abdominal wall hypoplasia could be associated with fetal ascites without anemia.
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Affiliation(s)
- Tetsu Yamaguchi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Natsuko Takano
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Kazuko Sato
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Hayato Sakurai
- Division of Neonatal Medicine, Department of Pediatrics, Saitama Medical University, Saitama, Japan
| | - Hirofumi Ohashi
- Division of Medical Genetics, Saitama Children's Medical Center, Saitama, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
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10
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Tamaru S, Tsunegi S, Kubota H, Yuasa S. Erratum: "Vector network analyzer ferromagnetic resonance spectrometer with field differential detection" [Rev. Sci. Instrum. 89, 053901 (2018)]. Rev Sci Instrum 2021; 92:069902. [PMID: 34243498 DOI: 10.1063/5.0056012] [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] [Received: 05/05/2021] [Accepted: 05/11/2021] [Indexed: 06/13/2023]
Affiliation(s)
- S Tamaru
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan
| | - S Tsunegi
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan
| | - H Kubota
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan
| | - S Yuasa
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan
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11
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Tanizawa K, Nishimura Y, Okada A, Nishikawa M, Tamaru S, Nagai N. Stroke, systemic embolism and bleeding rate in non-valvular atrial fibrillation patients without anticoagulation on the real world data in Japan. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2816] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Anticoagulant therapy is recommended in patients with non-valvular atrial fibrillation (NVAF) for those with CHADS2 ≥2. However, there have been significant number of subjects with CHADS2 ≥2 who receive no anticoagulation. Most of reported real world data have been collected mainly before wide spread use of DOAC. This study evaluated the clinical outcome of no anticoagulant drug therapy in NVAF.
Methods
This study is a non-interventional, observational, retrospective cohort study of NVAF patients in Mie-LIP Database, which is a regional clinical database joining 1 university hospital and 8 general hospitals in Mie prefecture in Japan. Patient enrolment was conducted from 1st Jan. 2016 to 31st Dec. 2018. The primary outcome events are ischemic stroke, systemic embolism, and bleeding events (bleeding to need a blood transfusion, intracranial bleeding, intraocular bleeding, and gastrointestinal bleeding).
Results
7001 patients were included in the current analysis, 2550 patients, 36.4% were treated without any anticoagulant drug therapy. Table 1 shows patients with no anticoagulant drug therapy, mean age was 75.4 years and 42.2% of patients were female. The most frequent comorbidities included hypertension (50.0%), diabetes mellitus (28.2%), heart failure (14.0%), ischemic stroke (12.7%), vascular disease (14.4%) respectively. The annual incidence of ischemic stroke, systemic embolism per 100 person-years is 3.7, and that in each CHADS2 group is 0: 1.4, 1: 1.4, 2: 3.2, 3–6: 8, respectively in Figure 1. The annual incidence of bleeding events is 1.5, and that in each CHADS2 group is 0: 0.7, 1: 1.0, 2: 1.2, 3–6: 2.9, respectively.
Conclusions
Approximately one-thirds of subjects have not received any anticoagulation in the modern DOAC in daily clinical practice in Japan. The rate of ischemic stroke and systemic embolism increased by CHADS2. Stroke or SEE rate was very low in subjects with CHADS2 ≤1, supporting no indication of anticoagulation in current guidelines. Regarding subjects with CHADS2>2, considering the higher risk of stroke, use of anticoagulant drug therapy is recommended.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- K Tanizawa
- Daiichi Sankyo Co.,Ltd., / Musashino University, Tokyo, Japan
| | - Y Nishimura
- Mie University Hospital, Clinical Research Support Center, Tsu, Mie, Japan
| | - A Okada
- Musashino University, Nishitokyo-shi, Tokyo, Japan
| | - M Nishikawa
- Mie Health Checkup Clinic, Kinki Health Care Center, Tsu, Mie, Japan
| | - S Tamaru
- Mie University Hospital, Clinical Research Support Center, Tsu, Mie, Japan
| | - N Nagai
- Musashino University, Nishitokyo-shi, Tokyo, Japan
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12
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Tamaru S, Sugibayashi R, Yamaguchi T, Takano N, Irie R, Wada S, Ishihara O, Sago H, Kamei Y. Spontaneous twin anemia polycythemia sequence without amniotic fluid discordance followed by development of twin-to-twin transfusion syndrome and treated by fetoscopic laser photocoagulation. Prenat Diagn 2019; 39:1159-1161. [PMID: 31419840 DOI: 10.1002/pd.5548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 08/04/2019] [Accepted: 08/07/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Rika Sugibayashi
- Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - Tetsu Yamaguchi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Natsuko Takano
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Rie Irie
- Department of Pathology, National Center for Child Health and Development, Tokyo, Japan
| | - Seiji Wada
- Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Haruhiko Sago
- Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
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13
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Tamaru S, Kajihara T, Mizuno Y, Takano N, Tochigi H, Sato T, Ishihara O. Heparin prevents oxidative stress-induced apoptosis in human decidualized endometrial stromal cells. Med Mol Morphol 2019; 52:209-216. [PMID: 30879129 DOI: 10.1007/s00795-019-00220-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 03/10/2019] [Indexed: 12/31/2022]
Abstract
Clinical trials have shown that administering heparin during the luteal phase has beneficial effects on implantation and live birth rates. Heparin exerts direct effects on decidual human endometrial stromal cells (HESCs), which are independent of its anticoagulant effect. However, the accurate effects of heparin on the decidualization process remain unidentified. Here, we demonstrate that HESCs become dramatically resistant to oxidative stress upon decidualization, and we hypothesize a possible direct action of heparin on the decidualization of HESCs, which would lead to improved implantation. To test this hypothesis, we established primary HESC cultures and propagated them, and then we decidualized confluent cultures with 8-bromo-cAMP, with medroxyprogesterone acetate, and with or without heparin. We treated the cells with hydrogen peroxide (H2O2) as a source of reactive oxygen species (ROS). Adding heparin to decidualized HESCs induced prolactin secretion. Decidualized HESCs treated with heparin were prevented from undergoing apoptosis induced by oxidative stress. Heparin induced nuclear accumulation of the forkhead transcription factor FOXO1 and expression of its downstream target, the ROS scavenger superoxide dismutase 2. These results demonstrate that heparin-treated decidualized HESCs acquired further resistance to oxidative stress, suggesting that heparin may improve the implantation environment.
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Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan
| | - Takeshi Kajihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan.
| | - Yumi Mizuno
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan
| | - Natsuko Takano
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan
| | - Hideno Tochigi
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan
| | - Tomomi Sato
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan.,Department of Anatomy, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, 350-0495, Japan
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14
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Tamaru S, Tsunegi S, Kubota H, Yuasa S. Vector network analyzer ferromagnetic resonance spectrometer with field differential detection. Rev Sci Instrum 2018; 89:053901. [PMID: 29864860 DOI: 10.1063/1.5022762] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This work presents a vector network analyzer ferromagnetic resonance (VNA-FMR) spectrometer with field differential detection. This technique differentiates the S-parameter by applying a small binary modulation field in addition to the DC bias field to the sample. By setting the modulation frequency sufficiently high, slow sensitivity fluctuations of the VNA, i.e., low-frequency components of the trace noise, which limit the signal-to-noise ratio of the conventional VNA-FMR spectrometer, can be effectively removed, resulting in a very clean FMR signal. This paper presents the details of the hardware implementation and measurement sequence as well as the data processing and analysis algorithms tailored for the FMR spectrum obtained with this technique. Because the VNA measures a complex S-parameter, it is possible to estimate the Gilbert damping parameter from the slope of the phase variation of the S-parameter with respect to the bias field. We show that this algorithm is more robust against noise than the conventional algorithm based on the linewidth.
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Affiliation(s)
- S Tamaru
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - S Tsunegi
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - H Kubota
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - S Yuasa
- Spintronics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
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15
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Tsunoda A, Oda H, Mizuno T, Yamashita Y, Tamaru S, Saito K, Ishihara M, Nishimura Y, Nakatani K, Katayama N. Prospective analysis of the risk factors for cisplatin-induced acute kidney injury. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx676.016] [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: 11/13/2022] Open
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16
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Tochigi H, Kajihara T, Mizuno Y, Mizuno Y, Tamaru S, Kamei Y, Okazaki Y, Brosens JJ, Ishihara O. Erratum: Loss of miR-542-3p enhances IGFBP-1 expression in decidualizing human endometrial stromal cells. Sci Rep 2017; 7:46591. [PMID: 28443632 PMCID: PMC5405451 DOI: 10.1038/srep46591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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17
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Tochigi H, Kajihara T, Mizuno Y, Mizuno Y, Tamaru S, Kamei Y, Okazaki Y, Brosens JJ, Ishihara O. Loss of miR-542-3p enhances IGFBP-1 expression in decidualizing human endometrial stromal cells. Sci Rep 2017; 7:40001. [PMID: 28051155 PMCID: PMC5209665 DOI: 10.1038/srep40001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 12/01/2016] [Indexed: 12/26/2022] Open
Abstract
Endometrial decidualization represents an essential step for the successful implantation of the embryo; however, the molecular mechanism behind this differentiation process remains unclear. This study aimed to identify novel microRNAs (miRNAs) involved in the regulation of decidual gene expression in human endometrial stromal cells (HESCs). An in vitro analysis of primary undifferentiated and decidualizing HESCs was conducted. HESCs were isolated from hysterectomy specimens from normally cycling premenopausal women with uterine fibroids, who were not on hormonal treatment at the time of surgery. Primary HESCs were expanded in culture and decidualized with 8-bromo-cyclic adenosine monophosphate and medroxyprogesterone acetate. Microarray analysis identified six miRNAs differentially expressed in response to decidualization of HESCs. All but one miRNA were downregulated upon decidualization, including miR-542-3p. We demonstrated that miR-542-3p overexpression inhibits the induction of major decidual marker genes, including IGFBP1, WNT4 and PRL. In addition, miR-542-3p overexpression inhibited the morphological transformation of HESCs in response to deciduogenic cues. A luciferase reporter assay confirmed that the 3′-untranslated region of IGFBP1 mRNA is targeted by miR-542-3p. The results suggest that miR-542-3p plays an important role in endometrial decidualization by regulating the expression of major decidual marker genes.
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Affiliation(s)
- Hideno Tochigi
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan.,Division of Functional Genomics and Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, 1397-1 Yamane, Hidaka city, Saitama, Japan
| | - Takeshi Kajihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Yosuke Mizuno
- Division of Functional Genomics and Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, 1397-1 Yamane, Hidaka city, Saitama, Japan
| | - Yumi Mizuno
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Shunsuke Tamaru
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan.,Division of Functional Genomics and Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, 1397-1 Yamane, Hidaka city, Saitama, Japan
| | - Yoshimasa Kamei
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
| | - Yasushi Okazaki
- Division of Functional Genomics and Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, 1397-1 Yamane, Hidaka city, Saitama, Japan.,Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, 1397-1 Yamane, Hidaka city, Saitama, Japan
| | - Jan J Brosens
- Division of Reproductive Health, Warwick Medical School, Clinical Sciences Research Laboratories, University Hospital, Coventry CV2 2DX, UK.,Tommy's National Miscarriage Research Centre, University Hospital Coventry and Warwickshire, Coventry CV2 2DX, UK
| | - Osamu Ishihara
- Department of Obstetrics and Gynecology, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama, Japan
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18
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Ishihara M, Tamaru S, Oda H, Yamashita Y, Tono Y, Mizuno T, Katayama N. Abstract P4-13-21: A pilot study of pertuzumab, trastuzumab and eribulin for patients with advanced HER2 positive breast cancer. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p4-13-21] [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: 11/16/2022]
Abstract
Abstract
[Introduction] The triple therapy of pertuzumab, trastuzumab and taxanes (docetaxel or paclitaxel) is coming into widespread use, because of the beneficial effects on HER2 positive breast cancer. However, we don't have enough information about the efficacy and safety of other agents with trastuzumab and pertuzumab (TP). We studied triple therapy of pertuzumab, trastuzumab and eribulin (PTE) for advanced HER2 positive breast cancer to assess the efficacy, safety and QOL prospectively (UMIN000012018).
[Patients and methods] Responses were assessed by RECIST criteria v1.1. Adverse events (AEs) were graded according to CTCAE v4.0. Patients with advanced HER2 positive breast cancer were treated with pertuzumab (840 mg loading then 420 mg, day 1), trastuzumab (8 mg/kg loading then 6 mg/kg, day 1), and eribulin (1.4 mg/m2, day 1 and 8) every 3 weeks. Dose reduction was allowed when patients developed febrile neutropenia, grade 3-5 non-hematologic toxicity or skipped day 8 eribulin administration because of neutrophil count <1000/mm3. QOL was assessed using FACT-B at baseline and 3 months after initial treatment.
[Results] Ten patients were enrolled. Median age of patients was 60 years-old (35-75). Median number of prior chemoregimen for metastatic disease was 3 (0-5). Two patients had a history of docetaxel allergy. Median number of PTE cycle was 6 (3-12). Eight patients reduced eribulin doses 1.4 mg/m2 to 1.1 mg/m2 because of AEs (2 patients), skipped day 8 eribulin (4 patients), or physician's choice (2 patients). One complete response, 1 partial response and 5 stable disease were achieved at 3 months. Two patients (1 CR and 1 SD) stopped eribulin and received TP as maintenance therapy. At 3 months, all 3 patients with progressive disease developed brain metastasis. Two patients had extracranial progressive lesions, but 1 patient had partial response for extracranial disease.
The common treatment-related AEs were leukopenia, neutropenia, lymphopenia diarrhea, hypokalemia and stomatitis. Grade 3 AEs were leukopenia (7 patients), neutropenia (8 patients), lymphopenia (2 patients), febrile neutropenia (1 patient), hypokalemia (1 patient) and peripheral neuropathy (1 patient). Grade 4/5 AEs were not observed.
Nine patients could be assessed QOL. FACT-B TOI, FACT-G and FACT-B total score had a tendency to be improved at 3 months.
[Conclusion] The PTE therapy showed appropriate clinical effect for extracranial lesions and maintained QOL of patients with advanced HER2 positive breast cancer. It may be a choice for patients who have taxane-resistant diseases or a history of taxane allergy.
Many patients needed to reduce eribulin dosage. When the PTE therapy is referred to advanced HER2 positive breast cancer patients as a palliative chemotherapy, eribulin (1.1mg/m2) might be a reasonable dosage.
Citation Format: Ishihara M, Tamaru S, Oda H, Yamashita Y, Tono Y, Mizuno T, Katayama N. A pilot study of pertuzumab, trastuzumab and eribulin for patients with advanced HER2 positive breast cancer. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-13-21.
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Affiliation(s)
- M Ishihara
- Mie University Hospital, Tsu, Mie, Japan
| | - S Tamaru
- Mie University Hospital, Tsu, Mie, Japan
| | - H Oda
- Mie University Hospital, Tsu, Mie, Japan
| | | | - Y Tono
- Mie University Hospital, Tsu, Mie, Japan
| | - T Mizuno
- Mie University Hospital, Tsu, Mie, Japan
| | - N Katayama
- Mie University Hospital, Tsu, Mie, Japan
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Kohda M, Tokuzawa Y, Kishita Y, Nyuzuki H, Moriyama Y, Mizuno Y, Hirata T, Yatsuka Y, Yamashita-Sugahara Y, Nakachi Y, Kato H, Okuda A, Tamaru S, Borna NN, Banshoya K, Aigaki T, Sato-Miyata Y, Ohnuma K, Suzuki T, Nagao A, Maehata H, Matsuda F, Higasa K, Nagasaki M, Yasuda J, Yamamoto M, Fushimi T, Shimura M, Kaiho-Ichimoto K, Harashima H, Yamazaki T, Mori M, Murayama K, Ohtake A, Okazaki Y. A Comprehensive Genomic Analysis Reveals the Genetic Landscape of Mitochondrial Respiratory Chain Complex Deficiencies. PLoS Genet 2016; 12:e1005679. [PMID: 26741492 PMCID: PMC4704781 DOI: 10.1371/journal.pgen.1005679] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/27/2015] [Indexed: 02/07/2023] Open
Abstract
Mitochondrial disorders have the highest incidence among congenital metabolic disorders characterized by biochemical respiratory chain complex deficiencies. It occurs at a rate of 1 in 5,000 births, and has phenotypic and genetic heterogeneity. Mutations in about 1,500 nuclear encoded mitochondrial proteins may cause mitochondrial dysfunction of energy production and mitochondrial disorders. More than 250 genes that cause mitochondrial disorders have been reported to date. However exact genetic diagnosis for patients still remained largely unknown. To reveal this heterogeneity, we performed comprehensive genomic analyses for 142 patients with childhood-onset mitochondrial respiratory chain complex deficiencies. The approach includes whole mtDNA and exome analyses using high-throughput sequencing, and chromosomal aberration analyses using high-density oligonucleotide arrays. We identified 37 novel mutations in known mitochondrial disease genes and 3 mitochondria-related genes (MRPS23, QRSL1, and PNPLA4) as novel causative genes. We also identified 2 genes known to cause monogenic diseases (MECP2 and TNNI3) and 3 chromosomal aberrations (6q24.3-q25.1, 17p12, and 22q11.21) as causes in this cohort. Our approaches enhance the ability to identify pathogenic gene mutations in patients with biochemically defined mitochondrial respiratory chain complex deficiencies in clinical settings. They also underscore clinical and genetic heterogeneity and will improve patient care of this complex disorder. Mitochondria play a crucial role in ATP biosynthesis and comprise proteins encoded in both the nuclear and mitochondrial genomes. Although more than 250 mitochondrial disease-causing genes have been reported, the exact genetic causes in patients remain largely unknown. Here, we aimed to provide further insights into the pathogenic mechanisms of mitochondrial disorders. We investigated the genes encoded in the nuclear and mitochondrial genomes using comprehensive genomic analysis in 142 patients with mitochondrial respiratory chain complex deficiencies. We identified 3 novel disease-causing mitochondria-related genes (MRPS23, QRSL1, and PNPLA4) as well as other disease-causing genes and novel pathogenic mutations in known mitochondrial disease-causing genes. All pathogenic mutations in this study are validated by genetic and/or functional evidence. Our findings, including the achievement of firm genetic diagnoses for 49 of 142 patients (34.5%), were higher than the general diagnosis rate of approximately 25% and demonstrated the value of comprehensive genomic analysis. Accordingly, we have shed light on the genetic heterogeneity underlying mitochondrial disorders.
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Affiliation(s)
- Masakazu Kohda
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yoshimi Tokuzawa
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yoshihito Kishita
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Hiromi Nyuzuki
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yohsuke Moriyama
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
- Division of Developmental Biology, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yosuke Mizuno
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Tomoko Hirata
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yukiko Yatsuka
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yzumi Yamashita-Sugahara
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Yutaka Nakachi
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Hidemasa Kato
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
- Division of Developmental Biology, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Akihiko Okuda
- Division of Developmental Biology, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Shunsuke Tamaru
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Nurun Nahar Borna
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
| | - Kengo Banshoya
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
- Chemicals Assessment and Research Center, Chemicals Evaluation and Research Institute, Japan (CERI), Sugito-machi, Kitakatsushika-gun, Saitama, Japan
| | - Toshiro Aigaki
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Yukiko Sato-Miyata
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Kohei Ohnuma
- Department of Biological Sciences, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Tsutomu Suzuki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Asuteka Nagao
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Hazuki Maehata
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Fumihiko Matsuda
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan
| | - Koichiro Higasa
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan
| | - Masao Nagasaki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
- Graduate School of Medicine, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
- Graduate School of Information Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Jun Yasuda
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
- Graduate School of Medicine, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
| | - Masayuki Yamamoto
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
- Graduate School of Medicine, Tohoku University, Aoba-ku, Sendai, Miyagi, Japan
| | - Takuya Fushimi
- Department of Metabolism, Chiba Children's Hospital, Midori, Chiba, Japan
| | - Masaru Shimura
- Department of Metabolism, Chiba Children's Hospital, Midori, Chiba, Japan
| | | | - Hiroko Harashima
- Department of Pediatrics, Saitama Medical University, Moroyama-machi, Iruma-gun, Saitama, Japan
| | - Taro Yamazaki
- Department of Pediatrics, Saitama Medical University, Moroyama-machi, Iruma-gun, Saitama, Japan
| | - Masato Mori
- Department of Pediatrics, Matsudo City Hospital, Matsudo-shi, Chiba, Japan
| | - Kei Murayama
- Department of Metabolism, Chiba Children's Hospital, Midori, Chiba, Japan
| | - Akira Ohtake
- Department of Pediatrics, Saitama Medical University, Moroyama-machi, Iruma-gun, Saitama, Japan
- * E-mail: (AOh); (YO)
| | - Yasushi Okazaki
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University, Hidaka-shi, Saitama, Japan
- * E-mail: (AOh); (YO)
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Tamaru S, Mizuno Y, Tochigi H, Kajihara T, Okazaki Y, Okagaki R, Kamei Y, Ishihara O, Itakura A. MicroRNA-135b suppresses extravillous trophoblast-derived HTR-8/SVneo cell invasion by directly down regulating CXCL12 under low oxygen conditions. Biochem Biophys Res Commun 2015; 461:421-6. [DOI: 10.1016/j.bbrc.2015.04.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 04/08/2015] [Indexed: 01/01/2023]
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Tochigi H, Kajihara T, Mizuno Y, Tamaru S, Kamei Y, Okazaki Y, Ishihara O. Micrornas and their target genes related to endometrial decidualization. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.1000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hamada Y, Mizuno T, Tanaka K, Tamaru S, Oda H, Ishihara M, Sugawara Y, Saito K, Yamashita Y, Katsurahara M, Horiki N, Katayama N. The Presence of Second Primary Esophageal Tumor (Spet) is Still an Independent Negative Prognostic Factor for Head and Neck Cancer (Hnc) Patients: a Retrospective Study. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu340.27] [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: 11/13/2022] Open
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Tamaru S, Mizuno Y, Kajihara T, Okazaki Y, Kamei Y, Ishihara O, Itakura A. Microrna dependent Cxcl12 expression under hypoxia controls invasion of extravillous trophoblast derived Htr-8/svneo cells. Placenta 2014. [DOI: 10.1016/j.placenta.2014.06.329] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Uehara N, Mori M, Tokuzawa Y, Mizuno Y, Tamaru S, Kohda M, Moriyama Y, Nakachi Y, Matoba N, Sakai T, Yamazaki T, Harashima H, Murayama K, Hattori K, Hayashi JI, Yamagata T, Fujita Y, Ito M, Tanaka M, Nibu KI, Ohtake A, Okazaki Y. New MT-ND6 and NDUFA1 mutations in mitochondrial respiratory chain disorders. Ann Clin Transl Neurol 2014; 1:361-9. [PMID: 25356405 PMCID: PMC4184687 DOI: 10.1002/acn3.59] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 02/11/2014] [Accepted: 03/18/2014] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVE Mitochondrial respiratory chain disorder (MRCD) is an intractable disease of infants with variable clinical symptoms. Our goal was to identify the causative mutations in MRCD patients. METHODS The subjects were 90 children diagnosed with MRCD by enzyme assay. We analyzed whole mitochondrial DNA (mtDNA) sequences. A cybrid study was performed in two patients. Whole exome sequencing was performed for one of these two patients whose mtDNA variant was confirmed as non-pathogenic. RESULTS Whole mtDNA sequences identified 29 mtDNA variants in 29 patients (13 were previously reported, the other 13 variants and three deletions were novel). The remaining 61 patients had no pathogenic mutations in their mtDNA. Of the 13 patients harboring unreported mtDNA variants, we excluded seven variants by manual curation. Of the remaining six variants, we selected two Leigh syndrome patients whose mitochondrial enzyme activity was decreased in their fibroblasts and performed a cybrid study. We confirmed that m.14439G>A (MT-ND6) was pathogenic, while m.1356A>G (mitochondrial 12S rRNA) was shown to be a non-pathogenic polymorphism. Exome sequencing and a complementation study of the latter patient identified a novel c.55C>T hemizygous missense mutation in the nuclear-encoded gene NDUFA1. INTERPRETATION Our results demonstrate that it is important to perform whole mtDNA sequencing rather than only typing reported mutations. Cybrid assays are also useful to diagnose the pathogenicity of mtDNA variants, and whole exome sequencing is a powerful tool to diagnose nuclear gene mutations as molecular diagnosis can provide a lead to appropriate genetic counseling.
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Affiliation(s)
- Natsumi Uehara
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan ; Department of Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine Kobe, Japan
| | - Masato Mori
- Department of Pediatrics, Jichi Medical University Shimotsuke, Japan
| | - Yoshimi Tokuzawa
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Yosuke Mizuno
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Shunsuke Tamaru
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Masakazu Kohda
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan ; Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Yohsuke Moriyama
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Yutaka Nakachi
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan ; Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Nana Matoba
- Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
| | - Tetsuro Sakai
- Department of Pediatrics, Faculty of Medicine, Saitama Medical University Moroyama-machi, Japan
| | - Taro Yamazaki
- Department of Pediatrics, Faculty of Medicine, Saitama Medical University Moroyama-machi, Japan
| | - Hiroko Harashima
- Department of Pediatrics, Faculty of Medicine, Saitama Medical University Moroyama-machi, Japan
| | - Kei Murayama
- Department of Metabolism, Chiba Children's Hospital Chiba, Japan
| | - Keisuke Hattori
- Faculty of Life and Environmental Sciences, University of Tsukuba Tsukuba, Japan
| | - Jun-Ichi Hayashi
- Faculty of Life and Environmental Sciences, University of Tsukuba Tsukuba, Japan
| | - Takanori Yamagata
- Department of Pediatrics, Jichi Medical University Shimotsuke, Japan
| | - Yasunori Fujita
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology Itabashi, Japan
| | - Masafumi Ito
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology Itabashi, Japan
| | - Masashi Tanaka
- Department of Genomics for Longevity and Health, Tokyo Metropolitan Institute of Gerontology Itabashi, Japan
| | - Ken-Ichi Nibu
- Department of Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine Kobe, Japan
| | - Akira Ohtake
- Department of Pediatrics, Faculty of Medicine, Saitama Medical University Moroyama-machi, Japan
| | - Yasushi Okazaki
- Division of Functional Genomics & Systems Medicine, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan ; Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University Hidaka, Japan
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Tamaru S, Mizuno Y, Kajihara T, Okazaki Y, kamei Y, Ishihara O, Itakura A. A comprehensive analysis of microRNAs and their target genes associated with trophoblast invasion. Placenta 2013. [DOI: 10.1016/j.placenta.2013.07.021] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tamaru S, Ricketts DS. Measurement of ultra-low power oscillators using adaptive drift cancellation with applications to nano-magnetic spin torque oscillators. Rev Sci Instrum 2013; 84:054704. [PMID: 23742572 DOI: 10.1063/1.4804650] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This work presents a technique for measuring ultra-low power oscillator signals using an adaptive drift cancellation method. We demonstrate this technique through spectrum measurements of a sub-pW nano-magnet spin torque oscillator (STO). We first present a detailed noise analysis of the standard STO characterization apparatus to estimate the background noise level, then compare these results to the noise level of three measurement configurations. The first and second share the standard configuration but use different spectrum analyzers (SA), an older model and a state-of-the-art model, respectively. The third is the technique proposed in this work using the same old SA as for the first. Our results show that the first and second configurations suffer from a large drift that requires ~30 min to stabilize each time the SA changes the frequency band, even though the SA has been powered on for longer than 24 h. The third configuration introduced in this work, however, shows absolutely no drift as the SA changes frequency band, and nearly the same noise performance as with a state-of-the-art SA, thus providing a reliable method for measuring very low power signals for a wide variety of applications.
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Affiliation(s)
- S Tamaru
- Electrical and Computer Engineering Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
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Nomura H, Mizuno T, Saito K, Yamashita Y, Tamaru S, Oda H, Hiasa A, Kageyama S, Takeuchi T, Katayama N. Skeletal Complications and Survival in Gastric Cancer Patients with Skeletal Metastases. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32459-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Imada S, Kikuchi A, Horikoshi T, Ishikawa K, Tamaru S, Komatsu A, Takagi K, Ogiso Y. Prenatal diagnosis and management of congenital chloride diarrhea: A case report of 2 siblings. J Clin Ultrasound 2012; 40:239-242. [PMID: 22362191 DOI: 10.1002/jcu.21895] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Accepted: 12/28/2011] [Indexed: 05/31/2023]
Abstract
Congenital chloride diarrhea (CLD) is a rare hereditary disease. The basic defect of CLD is massive loss of Cl(-) and fluid into the ileum and colon. Prenatal diagnosis of this disease is quite important because the infant requires electrolyte supplementation from the early postnatal period. Two cases in which prenatal diagnoses of CLD were made in siblings are reported. Extreme electrolyte imbalance may cause fetal cardiac dysfunction or a poor general condition leading to a non-reassuring fetal status in cases with CLD. Therefore, frequent fetal monitoring using cardiotocograms and ultrasound may be beneficial to some fetuses with CLD to detect fetal deterioration. In addition, repeated amnioreduction may be required to treat severe polyhydramnios and threatened preterm delivery.
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Affiliation(s)
- Shinya Imada
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, 3100 Toyoshina, Azumino, Nagano, Japan
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Tamaru S, Kikuchi A, Takagi K, Okuno J, Ishikawa K, Imada S, Horikoshi T, Goto YI, Hirabayashi S. A case of pyruvate dehydrogenase E1α subunit deficiency with antenatal brain dysgenesis demonstrated by prenatal sonography and magnetic resonance imaging. J Clin Ultrasound 2012; 40:234-238. [PMID: 21812000 DOI: 10.1002/jcu.20864] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 06/12/2011] [Indexed: 05/31/2023]
Abstract
Prenatal depiction of brain dysgenesis in patients with pyruvate dehydrogenase complex (PDHc) deficiencies has been infrequently reported. As PDHc plays a critical role in the brain that obtains all of the energy from the aerobic oxidation of glucose, its deficiency is a severe inborn disorder of metabolism, which predominantly affects the nervous system. This report describes a case of PDHc deficiency with antenatal brain dysgenesis depicted in detail by fetal ultrasound and magnetic resonance imaging. This is the first case report clearly demonstrating the developing mechanism and time course of antenatal brain lesions in a patient with PDHc deficiency.
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Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, Nagano, Japan
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Ishikawa K, Kikuchi A, Matsui H, Tamaru S, Imada S, Horikoshi T, Takagi K. Transplacental fetal therapy for junctional ectopic tachycardia. J Clin Ultrasound 2012; 40:119-123. [PMID: 21935962 DOI: 10.1002/jcu.20880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 08/16/2011] [Indexed: 05/31/2023]
Abstract
Junctional ectopic tachycardia (JET) is a rare type of tachyarrhythmia. A 39-year-old woman was transferred to our hospital for fetal tachyarrhythmia at 32 weeks' gestation. Fetal cardiac sonography revealed atrial and ventricular rates of 120-130 and 175-230 bpm, respectively, without 1:1 atrioventricular relationship. As ventricular tachycardia was considered to be the most probable diagnosis, transplacental therapy with digoxin and sotalol was done with partial response. Diagnosis of JET was made after birth. Although fetal JET is rare and prenatal diagnosis and treatment of this condition is still a challenge, differential diagnosis of fetal tachyarrhythmia should include this disorder.
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Affiliation(s)
- Kaori Ishikawa
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, 3100 Toyoshina, Azumino, Nagano 399-8288, Japan
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Imada S, Takagi K, Kikuchi A, Ishikawa K, Tamaru S, Horikoshi T, Ogiso Y. Birthweight placental weight ratio of appropriate-for-dates and light-for-dates infants in preterm delivery. J Obstet Gynaecol Res 2011; 38:122-9. [DOI: 10.1111/j.1447-0756.2011.01641.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Severe symptomatic fetal toxoplasmosis rarely occurs after the maternal primary infection of Toxoplasma gondii. We herein report our experience of fetal therapy of symptomatic toxoplasmosis using azithromycin. Ultrasound assessment at 23 weeks' gestation revealed fetal ascites, cardiac effusion, cardiomegaly, enlarged lateral ventricles and thickened placenta. Serum Toxoplasma gondii antibody titer was ×81,920. Toxoplasma immunoglobulin M was 2.4 index (normal, <0.8 index), and immunoglobulin G was ≥240 IU/mL (normal, <6 IU/mL). Maternal oral administration of azithromycin in addition to sulfadoxine, pyrimethamine and acetylspiramycin was conducted. Spontaneous vaginal delivery occurred at 32 weeks and a male infant weighing 2036 g was born. Hepatosplenomegaly, chorioretinitis, hydrocephalus, intracranial calcifications, ascites, and meningitis were confirmed after birth. The infant underwent therapy with pyrimethamine and sulfadiazine. It seems imperative to establish a new drug choice for fetal therapy of severe symptomatic toxoplasmosis in order to reduce the maternal and fetal risks of drug side-effects.
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Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, Nagano, Japan
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Wakamatsu M, Kikuchi A, Tamaru S, Ono K, Horikoshi T, Takagi K, Ogiso Y, Tanemura M. Voronoi diagram description of the maternal surface of the placenta: preliminary report. J Obstet Gynaecol Res 2011; 37:792-9. [PMID: 21395906 DOI: 10.1111/j.1447-0756.2010.01436.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIM Voronoi diagram is defined as a diagram of a collection of geometric points that defines a partition of space into cells, each of which consists of the points closer to one particular point than to any other. The distinctive feature of a placentone is the fetomaternal circulatory unit which is composed of one villous tree with a corresponding, centrifugally perfused portion of the intervillous space. Based on this placental architecture, in this study we generated Voronoi diagram from the photographic images of the maternal surface of the placenta and compared them with the shapes of the actual placentones. MATERIAL AND METHODS We simulated the placentones of 12 placentas based on Voronoi diagram using a computer program, and compared them with the photographic images of the actual maternal surface of the placentas. The point was carefully selected and adjusted so that the generated Voronoi diagram could represent the actual maternal surface of the placenta. RESULTS Voronoi diagram simulated satisfactorily the borders of placentones in 10 placentas. However, we could not succeed in the simulation in two cases. CONCLUSION It seems that development and formation of placentones are not only theoretically and physiologically explainable by Voronoi diagram, but also actually achieved by this mechanism. We believe that mathematical Voronoi diagram holds a promise for evaluating physiological and pathological development of the placenta.
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Affiliation(s)
- Masao Wakamatsu
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, Nagano, Japan
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Tamaru S, Kikuchi A, Takagi K, Wakamatsu M, Ono K, Horikoshi T, Kihara H, Nakamura T. Neurodevelopmental outcomes of very low birth weight and extremely low birth weight infants at 18 months of corrected age associated with prenatal risk factors. Early Hum Dev 2011; 87:55-9. [PMID: 21078549 DOI: 10.1016/j.earlhumdev.2010.10.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [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: 08/20/2010] [Revised: 10/13/2010] [Accepted: 10/26/2010] [Indexed: 12/13/2022]
Abstract
BACKGROUND Very premature infants occasionally have neurodevelopmental disabilities. However, there have been quite limited data on prenatal risk factors associated with their neurodevelopmental outcomes. AIM To clarify the relationship between prenatal risk factors and neurodevelopmental outcomes of very premature infants. STUDY DESIGN The study design is a retrospective review. SUBJECTS One hundred seventy Japanese women with a singleton pregnancy and their infants whose birth weight being less than 1500 g were included. We classified those infants into 118 appropriate for gestational age (AGA) and 52 small for gestational age (SGA) infants. OUTCOME MEASURES Infants' neurodevelopmental outcomes at 18 months of corrected age were evaluated by the Kyoto Scale of Psychological Development 2001 (KSPD). We analyzed and compared the infants' outcomes and prenatal risk factors between two groups. RESULTS Mortality and rate of infants unevaluable by KSPD because of severe impairment were not significantly different between those groups. However, the developmental quotient score of the cognitive-adaptive area in SGA infants born between 25 and 31 weeks of gestation was significantly lower than that in AGA infants randomly selected as gestation-matched controls. More advanced gestational age and heavier birth weight protected against adverse neurodevelopmental outcomes in both groups. Moreover, male infants were related to the excess risk of adverse neurodevelopmental outcomes in the SGA group. CONCLUSION In view of the neurodevelopment of the infants, it seems that the most efficient obstetric strategy for improving prognosis of premature infants should be targeted to prolong the pregnancy period as long as the reassuring fetal status and maternal stable health condition are being confirmed.
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Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, 3100 Toyoshina, Azumino, Nagano, Japan
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Horikoshi T, Kikuchi A, Tamaru S, Ono K, Kita M, Takagi K, Miyashita S, Kawame H, Shimokawa O, Harada N. Prenatal findings in a fetus with contiguous gene syndrome caused by deletion of Xp22.3 that includes locus for X-linked recessive type of chondrodysplasia punctata (CDPX1). J Obstet Gynaecol Res 2010; 36:671-5. [PMID: 20598055 DOI: 10.1111/j.1447-0756.2010.01193.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The X-linked recessive type of chondrodysplasia punctata (CDPX1) is a skeletal disorder that is characterized by stippled calcification at an epiphyseal nucleus and the surrounding soft tissue, short stature and an unusual face because of nasal hypoplasia. In most of the patients, this condition is noted after birth because of a characteristic face or respiratory problems. Here, we report a fetus with CDPX1. Two-dimensional ultrasound examination revealed unexplained polyhydramnios and a male fetus. Fetal biometry showed shortened long bones. Three-dimensional ultrasonography clearly demonstrated a hypoplastic nose with a depressed nasal bridge and contracture of wrists and fingers. Chromosome analysis of the amniotic fluid cells revealed the 46,Y,del(X)(p22.3) karyotype. Fluorescence in situ hybridization revealed a deletion of subtelomeric sequences at the Xpter and STS gene, but not a deletion of the KAL gene. The genomic copy number analysis demonstrated terminal deletion of 8.33 Mb that included SHOX, CSF2RA, XG, ARSE, NLGN4 and STS genes. We think that our case presents typical features of a fetus with this disorder and will be of great help in prenatal ultrasound diagnosis.
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Affiliation(s)
- Tsuguhiro Horikoshi
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, Azumino, Nagano, Japan
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Tamaru S, Kikuchi A, Ono K, Kita M, Horikoshi T, Takagi K. Prenatal ultrasound and magnetic resonance imaging depiction of a small sublingual ranula. J Clin Ultrasound 2010; 38:147-150. [PMID: 20014015 DOI: 10.1002/jcu.20659] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Prenatal diagnosis of a congenital ranula has rarely been reported. We describe the case of a small ranula depicted on prenatal sonogram and magnetic resonance imaging, in which we could confirm the intact airway. Although the size of the ranula noted in our fetus was the smallest among the cases reported in the English literature, both of these imaging modalities clearly presented typical diagnostic features present on both ultrasound and magnetic resonance imaging.
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Affiliation(s)
- Shunsuke Tamaru
- Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital, 3100 Toyoshina, Azumino, Nagano 399-8288, Japan
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Tamaru S, Kikuchi A, Takagi K, Wakamatsu M, Ono K, Horikoshi T, Nishimura G. Prenatal diagnosis of platyspondylic skeletal dysplasia Torrance type with three-dimensional helical computed tomography. Prenat Diagn 2009; 29:1282-4. [DOI: 10.1002/pd.2406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
HTLV-I is the pathogen that causes adult T-cell leukemia (ATL) and HTLV-I-associated myelopathy (HAM). The rate of disease development is low and the latency time is a few decades. However, the possible influence of immunosuppression on this disease development is unclear. The purpose of this study was to investigate the risk of development of ATL and HAM among the large number of HTLV-I-positive renal transplant recipients in western Japan. In principle immunosuppressive drugs have the possibilities to accelerate ATL development but are thought to suppress HAM development. Of 120 renal transplant recipients, 10 HTLV-I-positive recipients were reviewed, none of whom developed ATL or HAM. There are 11,896 dialysis patients in Japan and 300 dialysis patients in Okinawa who are registered with the JOTN for cadaveric renal transplant. The numbers of HTLV-I-positive patients in these groups were 97 (0.82%) and 26 (8.67%), respectively. These numbers are thought to be sufficient for an HTLV-I-positive recipient pool for HTLV-I-positive donors. Ten cases of ATL development and two of HAM development have been previously reported. Because of low number of ATL development, renal transplantation does not appear to be a contraindication for HTLV-I-positive chronic renal failure patients. In other words, kidneys from HTLV-I carriers, which include cadaveric donors, could be used for HTLV-I-positive recipients.
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Affiliation(s)
- N Nakamura
- Fukuoka University Hospital, Department of Urology, Fukuoka, Japan.
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Tamaru S. Metallographische Mitteilungen aus dem Institut für physikalische Chemie der Universität Göttingen. LXIX. Über die Legierungen des siliciums mit Zinn, Blei und Thallium. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/zaac.19090610104] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tamaru S, Nakamura M, Takeuchi M, Shinkai S. Rational design of a sugar-appended porphyrin gelator that is forced to assemble into a one-dimensional aggregate. Org Lett 2001; 3:3631-4. [PMID: 11700099 DOI: 10.1021/ol0165544] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[structure--see text] As an attempt to rationally design organogelators, an amphiphilic porphyrin bearing four beta-D-galactopyranoside groups at its periphery was synthesized. This compound tends to aggregate in a one-dimensional direction, resulting in very robust gels in DMF/alcohol mixed solvents. Spectroscopic studies and electron-micrographic observations support the view that the pi-pi stacking interaction among porphyrin moieties and the hydrogen-bonding interaction among sugar moieties operate synergistically to give rise to a stable one-dimensional aggregate structure indispensable for gel formation.
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Affiliation(s)
- S Tamaru
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan
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Okumura Y, Asakawa K, Ogasahara Y, Muramatu A, Wada S, Tamaru S, Nagai M. [Bathing in bed accelerates the recovery of skin temperature after ethanol-loading]. Ann Physiol Anthropol 1994; 13:49-54. [PMID: 8129834 DOI: 10.2114/ahs1983.13.49] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Bathing in bed (BB) is an essential nursing technique applied to patients with restricted physical abilities. The aim of this technique is to keep the functions of the skin as an external barrier and to prevent the patients from infection and decubitus. However, the effect of BB on the blood circulation of the skin has not yet been identified, and the data observed are controversial. We have evaluated the effects of BB on the blood circulation of the skin by use of thermography. BB was applied on the right side of the back (RB) in 6 healthy female subjects who exposed both sides of their back (RB and LB) at room temperature. Ethanol was applied on the 5 x 5 cm area of RB and LB after BB, and recovery of the skin temperature was observed. After BB, the average temperature of RB was significantly lower than that of LB. This shows that BB decreases temperature of the skin exposed in the air probably due to the supply of water by washcloth. Recovery of the skin temperature after the ethanol-loading was accelerated on RB. This indicates that BB facilitates the response of the blood vessels in the skin.
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Nakajima K, Otake H, Masuda M, Tamaru S, Yamaguchi K. [Health conditions of residents of village K, a farming section of Ichihara-Shi--in search of a guideline for nursing activities in a farming community]. Hokenfu Zasshi 1978; 34:276-86. [PMID: 247025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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