2023/04/14 更新

写真a

ムラオカ アヤコ
村岡 彩子
MURAOKA Ayako
所属
医学部附属病院 総合周産期母子医療センター 生殖周産期部門 助教
大学院担当
大学院医学系研究科
職名
助教

学位 1

  1. 医学博士 ( 2021年3月   名古屋大学 ) 

 

論文 6

  1. Upregulated Ribosomal Pathway Impairs Follicle Development in a Polycystic Ovary Syndrome Mouse Model: Differential Gene Expression Analysis of Oocytes

    Nakanishi Natsuki, Osuka Satoko, Kono Tomohiro, Kobayashi Hisato, Ikeda Shinya, Bayasula Bayasula, Sonehara Reina, Murakami Mayuko, Yoshita Sayako, Miyake Natsuki, Muraoka Ayako, Kasahara Yukiyo, Murase Tomohiko, Nakamura Tomoko, Goto Maki, Iwase Akira, Kajiyama Hiroaki

    REPRODUCTIVE SCIENCES     2022年10月

     詳細を見る

    記述言語:英語   出版者・発行元:Reproductive Sciences  

    Polycystic ovary syndrome (PCOS), a common endocrine disorder, is associated with impaired oocyte development, leading to infertility. However, the pathogenesis of PCOS has not been completely elucidated. This study aimed to determine the differentially expressed genes (DEGs) and epigenetic changes in the oocytes from a PCOS mouse model to identify the etiological factors. RNA-sequencing analysis revealed that 90 DEGs were upregulated and 27 DEGs were downregulated in mice with PCOS compared with control mice. DNA methylation analysis revealed 30 hypomethylated and 10 hypermethylated regions in the PCOS group. However, the DNA methylation status did not correlate with differential gene expression. The pathway enrichment analysis revealed that five DEGs (Rps21, Rpl36, Rpl36a, Rpl37a, and Rpl22l1) were enriched in ribosome-related pathways in the oocytes of mice with PCOS, and the immunohistochemical analysis revealed significantly upregulated expression levels of Rps21 and Rpl36. These results suggest that differential gene expression in the oocytes of mice in PCOS is related to impaired folliculogenesis. These findings improve our understanding of PCOS pathogenesis.

    DOI: 10.1007/s43032-022-01095-7

    Web of Science

    Scopus

    PubMed

  2. Predictive factors for massive hemorrhage in women with retained products of conception: a prospective study

    Sonehara Reina, Nakamura Tomoko, Iwase Akira, Nishida Kazuki, Takikawa Sachiko, Murakami Mayuko, Yoshita Sayako, Muraoka Ayako, Miyake Natsuki, Nakanishi Natsuki, Osuka Satoko, Goto Maki, Kajiyama Hiroaki

    SCIENTIFIC REPORTS   12 巻 ( 1 ) 頁: 11859   2022年7月

     詳細を見る

    記述言語:日本語   出版者・発行元:Scientific Reports  

    Retained products of conception (RPOC) is a common cause of postpartum bleeding, which may be life-threatening; however, no evidence-based guidelines exist to assist in evaluating the risk of massive hemorrhage in women with RPOC. In this prospective study, we aimed to evaluate the predictive factors for massive hemorrhage in women with RPOC. The primary and secondary endpoints were to validate the usefulness of power Doppler color scoring (PDCS) in evaluating hypervascularity and to identify other predictive factors (such as maximum RPOC diameter and serum βhCG and Hb level at first visit), respectively. Among the 51 women with RPOC included in this study, 16 (31.5%) experienced massive hemorrhage during follow-up. None of the women with PDCS 1 or 2 (18) experienced massive hemorrhage, whereas 16 (48.5%) women with PDCS 3 or 4 (33) did. Multiple logistic regression analysis showed that the odds ratio [95% confidence interval] (P value) for PDCS, assisted reproductive technology (ART), and low serum hemoglobin (Hb) levels were 22.39 [2.25 − 3087.92] (P = 0.004), 5.72 [1.28 − 33.29] (P = 0.022), and 4.24 [0.97 − 22.99] (P = 0.056), respectively. Further, the decision tree method identified PDCS, ART, and low serum Hb levels as potential predictive factors for massive hemorrhage. This study identified PDCS as useful predictor of massive hemorrhage in women with RPOC. With additional inclusion of factors such as ART and low serum Hb levels, the risk of massive hemorrhage may be effectively evaluated, leading to better management of women of reproductive age.

    DOI: 10.1038/s41598-022-15564-1

    Web of Science

    Scopus

    PubMed

  3. Effectiveness of NLRP3 Inhibitor as a Non-Hormonal Treatment for ovarian endometriosis

    Murakami Mayuko, Osuka Satoko, Muraoka Ayako, Hayashi Shotaro, Bayasula, Kasahara Yukiyo, Sonehara Reina, Hariyama Yumi, Shinjo Kanako, Tanaka Hideaki, Miyake Natsuki, Yoshita Sayako, Nakanishi Natsuki, Nakamura Tomoko, Goto Maki, Kajiyama Hiroaki

    REPRODUCTIVE BIOLOGY AND ENDOCRINOLOGY   20 巻 ( 1 ) 頁: 58   2022年3月

     詳細を見る

    記述言語:日本語   出版者・発行元:Reproductive Biology and Endocrinology  

    Background: Endometriosis is a complex syndrome characterized by an estrogen-dependent chronic inflammatory process that affects 10% of women of reproductive age. Ovarian endometriosis (OE) is the most common lesion in endometriosis and may cause infertility, in addition to dysmenorrhea. Hormonal treatments, which are the conventional treatment methods for endometriosis, suppress ovulation and hence are not compatible with fertility. The inflammasome is a complex that includes Nod-like receptor (NLR) family proteins, which sense pathogen-associated molecular patterns and homeostasis-altering molecular processes. It has been reported that the nucleotide-binding oligomerization domain, leucine-rich repeat, and pyrin domain-containing (NLRP) 3 inflammasome, which contributes to the activation of interleukin-1 beta (IL-1β), might be related to the progression of endometriosis. Therefore, the aim of the present study was to evaluate non-hormonal therapies for OE, such as inhibitors of the NLRP3 inflammasome. Methods: The expression of NLRP3 was measured in the eutopic endometrium (EM) of patients with and without endometriosis and OE samples, as well as stromal cells derived from the endometrium of patients with and without endometriosis and OE samples (endometrial stromal cells with endometriosis [ESCs] and cyst-derived stromal cells [CSCs]). The effects of an NLRP3 inhibitor (MCC950) on ESCs and CSCs survival and IL-1β production were evaluated. We then administered MCC950 to a murine model of OE to evaluate its effects on OE lesions and ovarian function. Results: NLRP3 gene and protein expression levels were higher in OE and CSCs than in EM and ESCs, respectively. MCC950 treatment significantly reduced the survival of CSCs, but not that of ESCs. Moreover, MCC950 treatment reduced the co-localization of NLRP3 and IL-1β in CSCs, as well as IL-1β concentrations in CSCs supernatants. In the murine model, MCC950 treatment reduced OE lesion size compared to phosphate-buffered saline treatment (89 ± 15 vs. 49 ± 9.3 mm3 per ovary; P < 0.05). In the MCC950-treated group, IL-1β and Ki67 levels in the OE-associated epithelia were reduced along with the oxidative stress markers of granulosa cells. Conclusions: These results indicated that NLRP3/IL-1β is involved in the pathogenesis of endometriosis and that NLRP3 inhibitors may be useful for suppressing OE and improving the function of ovaries with endometriosis.

    DOI: 10.1186/s12958-022-00924-3

    Web of Science

    Scopus

    PubMed

  4. Functional Lactotrophs in Induced Adenohypophysis Differentiated From Human iPS Cells

    Miyake Natsuki, Nagai Takashi, Suga Hidetaka, Osuka Satoko, Kasai Takatoshi, Sakakibara Mayu, Soen Mika, Ozaki Hajime, Miwata Tsutomu, Asano Tomoyoshi, Kano Mayuko, Muraoka Ayako, Nakanishi Natsuki, Nakamura Tomoko, Goto Maki, Yasuda Yoshinori, Kawaguchi Yohei, Miyata Takashi, Kobayashi Tomoko, Sugiyama Mariko, Onoue Takeshi, Hagiwara Daisuke, Iwama Shintaro, Iwase Akira, Inoshita Naoko, Arima Hiroshi, Kajiyama Hiroaki

    ENDOCRINOLOGY   163 巻 ( 3 )   2022年3月

     詳細を見る

    記述言語:日本語   出版者・発行元:Endocrinology (United States)  

    Prolactin (PRL), a hormone involved in lactation, is mainly produced and secreted by the lactotrophs of the anterior pituitary (AP) gland. We previously reported a method to generate functional adrenocorticotropic hormone-producing cells by differentiating the AP and hypothalamus simultaneously from human induced pluripotent stem cells (iPSCs). However, PRL-producing cells in the induced AP have not been investigated. Here, we confirmed the presence of PRL-producing cells and evaluated their endocrine functions. We differentiated pituitary cells from human iPSCs using serum-free floating culture of embryoid-like aggregates with quick reaggregation (SFEB-q) method and evaluated the appearance and function of PRL-producing cells. Secretion of PRL from the differentiated aggregates was confirmed, which increased with further culture. Fluorescence immunostaining and immunoelectron microscopy revealed PRL-producing cells and PRL-positive secretory granules, respectively. PRL secretion was promoted by various prolactin secretagogues such as thyrotropin-releasing hormone, vasoactive intestinal peptide, and prolactin-releasing peptide, and inhibited by bromocriptine. Moreover, the presence of tyrosine hydroxylase-positive dopaminergic nerves in the hypothalamic tissue area around the center of the aggregates connecting to PRL-producing cells indicated the possibility of recapitulating PRL regulatory mechanisms through the hypothalamus. In conclusion, we generated pituitary lactotrophs from human iPSCs; these displayed similar secretory responsiveness as human pituitary cells in vivo. In the future, this is expected to be used as a model of human PRL-producing cells for various studies, such as drug discovery, prediction of side effects, and elucidation of tumorigenic mechanisms using disease-specific iPSCs. Furthermore, it may help to develop regenerative medicine for the pituitary gland.

    DOI: 10.1210/endocr/bqac004

    Web of Science

    Scopus

    PubMed

  5. Impact of perioperative use of GnRH agonist or dienogest on ovarian reserve after cystectomy for endometriomas: a randomized controlled trial 招待有り 査読有り

    Ayako Muraoka

    Reproductive Biology and Endocrinology   19 巻 ( 179 )   2021年12月

     詳細を見る

    担当区分:筆頭著者  

  6. Establishment and characterization of cell lines from human endometrial epithelial and mesenchymal cells from patients with endometriosis 招待有り 査読有り

    Ayako Muraoka

    F&S Science   1 巻 ( 2 ) 頁: 195 - 205   2020年11月

     詳細を見る

    担当区分:筆頭著者   記述言語:英語  

▼全件表示

科研費 1

  1. 子宮内膜微小環境に着目した子宮内膜症の病態解明と抜本的新規治療法の開発

    研究課題/研究課題番号:22K16832  2022年4月 - 2024年3月

    科学研究費助成事業  若手研究

    村岡 彩子

      詳細を見る

    担当区分:研究代表者 

    配分額:2730000円 ( 直接経費:2100000円 、 間接経費:630000円 )

    子宮内膜症の発症原因を探索するため、子宮内膜症患者の正所性子宮内膜に高発現するtransgelin(TAGLN)に着目して子宮内膜症の病態解明及び抜本的新規治療法の開発を目指す。TAGLNの発現誘導因子の検証、詳細な機能解析、並びに内膜症モデルマウスを用いた生体内での検討を行うことでTAGLNの子宮内膜線維芽細胞での発現を抑制し、子宮内膜症を発症させない治療方法を模索する。

 

担当経験のある科目 (本学) 1

  1. 産婦人科

    2022

     詳細を見る

    産婦人科不妊生殖部門