Publications by authors named "Yojiro Maruyama"

13 Publications

  • Page 1 of 1

Whole exome sequencing of fetal structural anomalies detected by ultrasonography.

J Hum Genet 2021 May 3;66(5):499-507. Epub 2020 Nov 3.

Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.

The objective of this study was to evaluate the efficacy of whole exome sequencing (WES) for the genetic diagnosis of cases presenting with fetal structural anomalies detected by ultrasonography. WES was performed on 19 cases with prenatal structural anomalies. Genomic DNA was extracted from umbilical cords or umbilical blood obtained shortly after birth. WES data were analyzed on prenatal phenotypes alone, and the data were re-analyzed after information regarding the postnatal phenotype was obtained. Based solely on the fetal phenotype, pathogenic, or likely pathogenic, single nucleotide variants were identified in 5 of 19 (26.3%) cases. Moreover, we detected trisomy 21 in two cases by WES-based copy number variation analysis. The overall diagnostic rate was 36.8% (7/19). They were all compatible with respective fetal structural anomalies. By referring to postnatal phenotype information, another candidate variant was identified by a postnatal clinical feature that was not detected in prenatal screening. As detailed phenotyping is desirable for better diagnostic rates in WES analysis, we should be aware that fetal phenotype is a useful, but sometimes limited source of information for comprehensive genetic analysis. It is important to amass more data of genotype-phenotype correlations, especially to appropriately assess the validity of WES in prenatal settings.
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http://dx.doi.org/10.1038/s10038-020-00869-8DOI Listing
May 2021

Comparison of the labor curves with and without combined spinal-epidural analgesia in nulliparous women- a retrospective study.

BMC Pregnancy Childbirth 2020 Aug 15;20(1):467. Epub 2020 Aug 15.

Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.

Background: Neuraxial labor analgesia is known to increase the rate of instrumental delivery and prolong the second stage of labor; however, there is no standard method to evaluate the progress of labor under analgesia. Friedman curve is considered the gold standard for evaluating the progress of labor. However, it included not only neuraxial labor analgesia but also labor without analgesia. Thus we compared the labor curves of primiparous women undergoing labor with and without neuraxial labor analgesia, to understand the progress of labor in both groups and to arrive at a standard curve to monitor the progress of labor under neuraxial analgesia.

Methods: Primiparous women with cephalic singleton pregnancies who delivered at term from 2016 to 2017 were included. Two hundred patients who opted for combined spinal-epidural (CSE) labor analgesia were included in the CSE group and 200 patients who did not undergo CSE were included in the non-CSE group. In all, 400 cases were examined retrospectively. The evaluation parameters were cervical dilation and fetal station, and we calculated the average value per hour to plot the labor curves.

Results: The labor curve of the non-CSE group was significantly different from the Friedman curve. In the CSE group, the time from 4 cm dilation of the cervix to full dilation was 15 h; in addition, the speed of cervical dilation was different from that in the non-CSE group. The progress of labor in the CSE group was faster than that in the non-CSE group during the latent phase; however, the progress in the CSE group was slower than that in the non-CSE group during the active phase.

Conclusions: Neuraxial labor analgesia results in early cervical dilation and descent of the fetal head; thus, appropriate advance planning to manage the delivery may be essential.
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http://dx.doi.org/10.1186/s12884-020-03161-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7429797PMC
August 2020

Antepartum eclampsia with reversible cerebral vasoconstriction and posterior reversible encephalopathy syndromes.

J Obstet Gynaecol Res 2020 Oct 10;46(10):2147-2152. Epub 2020 Aug 10.

Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan.

A 39-year-old pregnant woman was experienced thunderclap headache due to reversible cerebral vasoconstriction syndrome (RCVS) as a prodromal symptom. Two days after, she was brought to our hospital after an eclamptic seizure at 35 weeks of gestation. After management with magnesium sulphate, a cesarean delivery was performed, and passed without eclamptic seizure recurrence with calcium channel blocker (CCB) administration for hypertension and prophylaxis of another seizure. Antepartum eclampsia is sometimes complicated by headache as a prodromal symptom. Cerebrovascular diseases in the perinatal period include eclampsia, RCVS and posterior reversible encephalopathy syndrome, which have potentially overlapping pathologies. Here, we first report a case of overlapping those three diseases in the antepartum period. Our best literature review showed that antepartum RCVS is severe and has complications besides thunderclap headache, and there is a case report which CCB administration was shown to be effective in the treatment of antepartum RCVS. If thunderclap headache is recognized, prediction of eclampsia and getting better course of RCVS with CCB administration may be possible.
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http://dx.doi.org/10.1111/jog.14410DOI Listing
October 2020

Laparoscopic Removal of Modified Vertical Uterine Compression Sutures due to Postoperative Focal Pain.

Surg J (N Y) 2020 Apr 31;6(2):e67-e70. Epub 2020 Mar 31.

Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan.

Previously we reported laparoscopic removal of compression sutures due to uterine ischemia and related pain, which has two of the difficult aspects: (1) maneuvering the curved needle to perform compression suturing in the narrow surgical field, and (2) distinguishing between the threads of the cesarean section wound sutures versus the vertical compression sutures during removal, as the threads are the same white color. We performed vertical compression sutures for intrapartum hemorrhage with total placental previa, and modified both the needle type and the color of the thread used for uterine compression sutures during cesarean section. After the operation, we performed successful laparoscopic removal of compression sutures for postoperative focal pain. Changing the needle type and color helped to perform operations. The present case supports the concept that the laparoscopic removal of uterine compression suturing is useful for controlling pain in cases where general analgesics are ineffective.
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http://dx.doi.org/10.1055/s-0040-1708865DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108947PMC
April 2020

Retrospective study of the recurrence risk of preterm birth in Japan.

J Matern Fetal Neonatal Med 2020 Feb 18:1-5. Epub 2020 Feb 18.

Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan.

A history of preterm birth is a risk factor for preterm birth in a future pregnancy, and there are some reports of prevention methods, such as the administration of progesterone. However, the rate of recurrence of preterm birth in Japan has not been clarified, and there is no data for judging whether these preventive methods are effective. To clarify the risk of recurrence of preterm birth and preterm prelabor rupture of membranes (pPROM) in Japan. A retrospective study was conducted using the perinatal registration database of the Japan Obstetrics and Gynecology Society for the Perinatal Center from 2014 to 2016. There were 704,418 subjects, of which 190,990 were excluded those with unknown maternal information, those under the age of 20 years, those with perinatal disease related to preterm birth, and first-time mothers. Logistic model unavailable and multivariate analysis were performed. An analysis of the preterm birth history indicated the risk of preterm birth in the current pregnancy, and the odds ratio for preterm birth recurrence once, twice, and three times or more was 3.3, 6.6, and 7.8, respectively. As a secondary analysis, we analyzed whether the history of pPROM is a risk factor of recurrence of pPROM and found a significant association with an odds ratio of 3.4. Having a preterm birth history increases the risk of recurrence of preterm birth, and the risk of recurrent preterm birth increases as the number of preterm births increases. Although this report is intended for high-risk pregnancies wherein the rate of preterm birth is high, as previously reported, our data indicate that in Japan, preterm birth is a risk factor of recurrent preterm birth.
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http://dx.doi.org/10.1080/14767058.2020.1727435DOI Listing
February 2020

Hereditary angioedema with deep vein thrombosis and pulmonary thromboembolism during pregnancy.

Taiwan J Obstet Gynecol 2019 Nov;58(6):895-896

Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo 113-8421, Japan.

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http://dx.doi.org/10.1016/j.tjog.2019.04.003DOI Listing
November 2019

Fetal umbilical cord cyst may evolve to omphalocele during pregnancy.

J Clin Ultrasound 2020 Mar 14;48(3):181-183. Epub 2019 Nov 14.

Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan.

Omphalocele is rarely complicated by umbilical cord cysts. In our case, an umbilical cord cyst and fetal ascites were detected at 26 weeks' gestation in a fetus with trisomy 13. This changed to omphalocele with subsequently absorbed fetal ascites at 35 weeks' gestation. We propose two hypotheses. The abdominal wall may have been physically pierced or an omphalocele might have preexisted, and the intestinal tract in the hernia sac was pushed by fetal ascites.
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http://dx.doi.org/10.1002/jcu.22786DOI Listing
March 2020

Multiple Placental Infarcts in a Pregnant Woman with Essential Thrombocythemia.

Intern Med 2018 Dec 10;57(24):3647-3650. Epub 2018 Aug 10.

Department of Hematology, Juntendo University School of Medicine, Japan.

Myeloproliferative neoplasms (MPNs), including polycythemia vera, essential thrombocythemia (ET), and primary myelofibrosis, mainly occur in older patients, but have also been reported in younger patients. A "second peak" occurs in female patients in their thirties, particularly in ET; thus, the management of pregnancy is often discussed. We herein present the case of a 33-year-old woman with a high platelet count and multiple placental infarcts during delivery who was subsequently diagnosed with ET. Although there are no worldwide guidelines for the management of MPNs in pregnancy, the risk of thrombosis is markedly increased in these patients, and antithrombotic therapy should be considered.
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http://dx.doi.org/10.2169/internalmedicine.1311-18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6355404PMC
December 2018

Clearance of senescent decidual cells by uterine natural killer cells in cycling human endometrium.

Elife 2017 12 11;6. Epub 2017 Dec 11.

Division of Biomedical Sciences, Clinical Science Research Laboratories, Warwick Medical School, University of Warwick, Coventry, United Kingdom.

In cycling human endometrium, menstruation is followed by rapid estrogen-dependent growth. Upon ovulation, progesterone and rising cellular cAMP levels activate the transcription factor Forkhead box O1 (FOXO1) in endometrial stromal cells (EnSCs), leading to cell cycle exit and differentiation into decidual cells that control embryo implantation. Here we show that FOXO1 also causes acute senescence of a subpopulation of decidualizing EnSCs in an IL-8 dependent manner. Selective depletion or enrichment of this subpopulation revealed that decidual senescence drives the transient inflammatory response associated with endometrial receptivity. Further, senescent cells prevent differentiation of endometrial mesenchymal stem cells in decidualizing cultures. As the cycle progresses, IL-15 activated uterine natural killer (uNK) cells selectively target and clear senescent decidual cells through granule exocytosis. Our findings reveal that acute decidual senescence governs endometrial rejuvenation and remodeling at embryo implantation, and suggest a critical role for uNK cells in maintaining homeostasis in cycling endometrium.
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http://dx.doi.org/10.7554/eLife.31274DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724991PMC
December 2017

Deregulation of the endometrial stromal cell secretome precedes embryo implantation failure.

Mol Hum Reprod 2017 07;23(7):478-487

KK Research Centre, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore 229899, Singapore.

Study Question: Is implantation failure following ART associated with a perturbed decidual response in endometrial stromal cells (EnSCs)?

Summary Answer: Dynamic changes in the secretome of decidualizing EnSCs underpin the transition of a hostile to a supportive endometrial microenvironment for embryo implantation; perturbation in this transitional pathway prior to ART is associated with implantation failure.

What Is Known Already: Implantation is the rate-limiting step in ART, although the contribution of an aberrant endometrial microenvironment in IVF failure remains ill defined.

Study Design, Size, Duration: In vitro characterization of the temporal changes in the decidual response of primary EnSCs isolated prior to a successful or failed ART cycle. An analysis of embryo responses to secreted cues from undifferentiated and decidualizing EnSCs was performed. The primary clinical outcome of the study was a positive urinary pregnancy test 14 days after embryo transfer.

Participants/materials, Setting, Methods: Primary EnSCs were isolated from endometrial biopsies obtained prior to IVF treatment and cryopreserved. EnSCs from 10 pregnant and 10 non-pregnant patients were then thawed, expanded in culture, subjected to clonogenic assays, and decidualized for either 2 or 8 days. Transcript levels of decidual marker gene [prolactin (PRL), insulin-like growth factor binding protein 1 (IGFBP1) and 11β-hydroxysteroid dehydrogenase (HSD11B1)] were analysed using real-time quantitative PCR and temporal secretome changes of 45 cytokines, chemokines and growth factors were measured by multiplex suspension bead immunoassay. The impact of the EnSC secretome on human blastocyst development was scored morphologically; and embryo secretions in response to EnSC cues analyzed by multiplex suspension bead immunoassay.

Main Results And The Role Of Chance: Clonogenicity and induction of decidual marker genes were comparable between EnSC cultures from pregnant and non-pregnant group groups (P > 0.05). Analysis of 23 secreted factors revealed that successful implantation was associated with co-ordinated secretome changes in decidualizing EnSCs, which were most pronounced on Day 2 of differentiation: 17 differentially secreted proteins on Day 2 of decidualization relative to undifferentiated (Day 0) EnSCs (P < 0.05); 11 differentially secreted proteins on Day 8 relative to Day 2 (P < 0.05); and eight differentially secreted proteins on Day 8 relative to Day 0 (P < 0.05). By contrast, failed implantation was associated with a disordered secretome response. Blastocyst development was compromised when cultured for 24 h in medium conditioned by undifferentiated EnSCs when compared to decidualizing EnSCs. Analysis of the embryo microdroplets revealed that human blastocysts mount a secretory cytokine response to soluble decidual factors produced during the early (Day 2) but not late phase (Day 8) of differentiation. The embryo responses to secreted factors from decidualizing EnSCs were comparable between the pregnant and non-pregnant group (P > 0.05).

Large Scale Data: Not applicable.

Limitations, Reasons For Caution: Although this study uses primary EnSCs and human embryos, caution is warranted when extrapolating the results to the in vivo situation because of the correlative nature of the study and limited sample size.

Wider Implications Of The Findings: Our finding raises the prospect that endometrial analysis prior to ART could minimize the risk of treatment failure.

Study Funding And Competing Interest(s): This work was supported by funds from the Biomedical Research Unit in Reproductive Health, a joint initiative of the University Hospitals Coventry & Warwickshire NHS Trust and Warwick Medical School, the University of Nottingham and Nurture Fertility, and the National Medical Research Council, Singapore (NMRC/BNIG14NOV023), the "Instituut voor Innovatie door Wetenschap en Technologie" (IWT, Flanders, Belgium), the "Fonds voor Wetenschappelijk Onderzoek" (FWO, Flanders, Belgium) and the "Wetenschappelijk Fonds Willy Gepts" (WFWG, UZ Brussel). The authors have declared that no conflict of interest exists.
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http://dx.doi.org/10.1093/molehr/gax023DOI Listing
July 2017

Short hairpin RNA library-based functional screening identified ribosomal protein L31 that modulates prostate cancer cell growth via p53 pathway.

PLoS One 2014 6;9(10):e108743. Epub 2014 Oct 6.

Division of Gene Regulation and Signal Transduction, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan; Departments of Geriatric Medicine and Anti-Aging Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.

Androgen receptor is a primary transcription factor involved in the proliferation of prostate cancer cells. Thus, hormone therapy using antiandrogens, such as bicalutamide, is a first-line treatment for the disease. Although hormone therapy initially reduces the tumor burden, many patients eventually relapse, developing tumors with acquired endocrine resistance. Elucidation of the molecular mechanisms underlying endocrine resistance is therefore a fundamental issue for the understanding and development of alternative therapeutics for advanced prostate cancer. In the present study, we performed short hairpin RNA (shRNA)-mediated functional screening to identify genes involved in bicalutamide-mediated effects on LNCaP prostate cancer cells. Among such candidate genes selected by screening using volcano plot analysis, ribosomal protein L31 (RPL31) was found to be essential for cell proliferation and cell-cycle progression in bicalutamide-resistant LNCaP (BicR) cells, based on small interfering RNA (siRNA)-mediated knockdown experiments. Of note, RPL31 mRNA is more abundantly expressed in BicR cells than in parental LNCaP cells, and clinical data from ONCOMINE and The Cancer Genome Altas showed that RPL31 is overexpressed in prostate carcinomas compared with benign prostate tissues. Intriguingly, protein levels of the tumor suppressor p53 and its targets, p21 and MDM2, were increased in LNCaP and BicR cells treated with RPL31 siRNA. We observed decreased degradation of p53 protein after RPL31 knockdown. Moreover, the suppression of growth and cell cycle upon RPL31 knockdown was partially recovered with p53 siRNA treatment. These results suggest that RPL31 is involved in bicalutamide-resistant growth of prostate cancer cells. The shRNA-mediated functional screen in this study provides new insight into the molecular mechanisms and therapeutic targets of advanced prostate cancer.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0108743PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4186824PMC
June 2015

Conditional expression of human bone Gla protein in osteoblasts causes skeletal abnormality in mice.

Biochem Biophys Res Commun 2012 Jul 23;424(1):164-9. Epub 2012 Jun 23.

Division of Gene Regulation and Signal Transduction, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan.

Bone Gla protein (BGP), also known as osteocalcin, is one of the most abundant γ-carboxylated noncollagenous protein in bone matrix and plays important roles in mineralization and calcium ion homeostasis. BGP is synthesized specifically in osteoblasts; however, its precise function in bone metabolism has not been fully elucidated. To investigate the in vivo function of human BGP (hBGP), we generated CAG-GFP(floxed)-hBGP transgenic mice carrying a transgene cassette composed of the promoter and a floxed GFP linked to hBGP cDNA. The mice were crossed with ColI-Cre mice, which express the Cre recombinase driven by the mouse collagen type 1a1 gene promoter, to obtain hBGP(ColI) conditional transgenic mice that expressed human BGP in osteoblasts. The hBGP(ColI) mice did not survive more than 2days after birth. The analysis of the 18.5-day post coitum fetuses of the hBGP(ColI) mice revealed that they displayed abnormal skeletal growth such as deformity of the rib and short femur and cranium lengths. Moreover, increased BGP levels were detected in the serum of the neonates. These findings indicate that hBGP expression in osteoblasts resulted in the abnormal skeletal growth in the mice. Our study provides a valuable model for understanding the fundamental role of BGP in vivo.
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http://dx.doi.org/10.1016/j.bbrc.2012.06.098DOI Listing
July 2012