Faculty Profiles - MASUYAMA Hisashi

Association of Regular Cervical Cancer Screening with Socioeconomic, COVID-19 Infection and Vaccine Status Among Japanese Population: Cohort Observational Study. International journal

Tomohiro Mitoma, Jota Maki, Hikaru Ooba, Chikako Ogawa, Hisashi Masuyama, Takahiro Tabuchi

International journal of general medicine 17 541 - 551 2024

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: Among the Organisation for Economic Co-operation and Development countries, Japan has one of the lowest cervical cancer screening coverages. Cancer screening coverage has worsened due to the coronavirus disease of 2019 (COVID-19) pandemic. This study investigated the relationship between socioeconomic background, COVID-19 infection history and vaccine status, and regular cervical cancer screening (CCS) during the two years of the COVID-19 era in Japan. PATIENTS AND METHODS: We used data from the Japan COVID-19 and Society Internet Survey, a nationwide, Internet-based, self-report cohort observational study conducted in 2022. The outcome variable was identified by asking whether the participants had undergone CCS within the last two years. Cervical cytology was performed in Japan by brushing the external cervical os. This study used multivariate log-binomial regression models to evaluate inequalities during regular checkups for CCS. Adjusted prevalence ratios (APRs) with 95% confidence intervals (CIs) were estimated to incorporate the socioeconomic background variables. RESULTS: Of the 12,066 participants, 5597 (46.4%) had undergone regular CCS for over two years. The prevalence ratio (PR) of patients who underwent CCS was 0.70 for those in their 20s and 0.78 for those in their 60s, compared to those in their 40s. Socioeconomic inequities were found in the following groups: unemployed/student, unmarried, high school graduate or lower, and household income below 4 million Yen. Our final multivariate analysis revealed that participants who were in their 20s or 60s, had a household income below 4 million Yen, were unmarried, had no annual health check-ups, and were unvaccinated with COVID-19 were at a higher risk of not undergoing CCS. CONCLUSION: The relationship between socioeconomic inequality and CCS hesitancy is prevalent among younger participants. The CCS coverage in Japan during the COVID-19 pandemic year (2020-2022) was not low compared with the pre-pandemic era.

DOI： 10.2147/IJGM.S453675

Adenosine Deaminase Family Acting on RNA 1 (ADAR1) May Be a De Novo Target for Endometriosis Treatment. International journal

Thuy Ha Vu, Keiichiro Nakamura, Kunitoshi Shigeyasu, Kotaro Kubo, Chiaki Kashino, Hisashi Masuyama

In vivo (Athens, Greece) 38 ( 2 ) 683 - 690 2024

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND/AIM: Adenosine deaminase family acting on RNA 1 (ADAR1) expression was examined to determine its correlation with endometriosis. The biological functions and inhibitory effects of ADAR1 knockdown were investigated in a human endometriotic cell line. MATERIALS AND METHODS: ADAR1 was examined in patients with and without endometriosis using reverse transcription polymerase chain reaction (RT-PCR), and the apoptotic expression of ADAR1 small interfering RNA (siRNA) was confirmed using flow cytometry. The biological functions and inhibitory effects of ADAR1 knockdown were investigated using RT-PCR in a 12Z immortalized human endometriotic cell line. RESULTS: ADAR1 expression was significantly higher in patients with endometriosis than in those without (p<0.001). ADAR1 siRNA increased early and late apoptosis, compared to the mock (24.83%) and control (19.96%) cells. ADAR1 knockdown led to apoptosis through MDA5, RIG-I, IRF3, IRF7, caspase 3, caspase 7, and caspase 8 expression in the cell lines. CONCLUSION: ADAR1 is a potential novel therapeutic target in endometriosis.

DOI： 10.21873/invivo.13489

Aggregated chromosomes/chromatin transfer: a novel approach for mitochondrial replacement with minimal mitochondrial carryover: the implications of mouse experiments for human aggregated chromosome transfer

R. Okamoto, W. Xiao, H. Fukasawa, S. Hirata, T. Sankai, H. Masuyama, J. Otsuki

Molecular Human Reproduction 29 ( 12 ) 2023.12

Publishing type：Research paper (scientific journal)

Nuclear transfer techniques, including spindle chromosome complex (SC) transfer and pronuclear transfer, have been employed to mitigate mitochondrial diseases. Nevertheless, the challenge of mitochondrial DNA (mtDNA) carryover remains unresolved. Previously, we introduced a method for aggregated chromosome (AC) transfer in human subjects, offering a potential solution. However, the subsequent rates of embryonic development have remained unexplored owing to legal limitations in Japan, and animal studies have been hindered by a lack of AC formation in other species. Building upon our success in generating ACs within mouse oocytes via utilization of the phosphodiesterase inhibitor 3-isobutyl 1-methylxanthine (IBMX), this study has established a mouse model for AC transfer. Subsequently, a comparative analysis of embryo development rates and mtDNA carryover between AC transfer and SC transfer was conducted. Additionally, the mitochondrial distribution around SC and AC structures was investigated, revealing that in oocytes at the metaphase II stage, the mitochondria exhibited a relatively concentrated arrangement around the spindle apparatus, while the distribution of mitochondria in AC-formed oocytes appeared to be independent of the AC position. The AC transfer approach produced a marked augmentation in rates of fertilization, embryo cleavage, and blastocyst formation, especially as compared to scenarios without AC transfer in IBMX-treated AC-formed oocytes. No significant disparities in fertilization and embryo development rates were observed between AC and SC transfers. However, relative real-time PCR analyses revealed that the mtDNA carryover for AC transfers was one-tenth and therefore significantly lower than that of SC transfers. This study successfully accomplished nuclear transfers with ACs in mouse oocytes, offering an insight into the potential of AC transfers as a solution to heteroplasmy-related challenges. These findings are promising in terms of future investigation with human oocytes, thus advancing AC transfer as an innovative approach in the field of human nuclear transfer methodology.

DOI： 10.1093/molehr/gaad043

Short stature in small-for-gestational-age offspring born to mothers with hypertensive disorders of pregnancy. International journal

Sakurako Mishima, Takashi Mitsui, Kazumasa Tani, Jota Maki, Eriko Eto, Kei Hayata, Yosuke Washio, Junko Yoshimoto, Hirokazu Tsukahara, Hisashi Masuyama

Hypertension in pregnancy 42 ( 1 ) 2187623 - 2187623 2023.12

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: To investigate the incidence and risk factors of small-for-gestational age (SGA) short stature at 2 and 3 years of age in SGA offspring born to women with hypertensive disorders of pregnancy (HDP). METHODS: We examined 226 women with HDP whose respective SGA offspring were delivered. RESULTS: Eighty offspring (41.2%) were diagnosed with SGA short stature. The prematurity before 32 weeks of gestation was the most significant factor for catch-up growth failure. CONCLUSION: In SGA offspring born to women with HDP, SGA short stature incidence was high, and the risk factor was prematurity before 32 weeks of gestation.

DOI： 10.1080/10641955.2023.2187623

【楽しくお産・楽しく育児-身体的・精神的・社会的(Biopsychosocial)な課題からみた出産・育児支援】身体的課題母体体重コントロール

衛藤英理子, 増山寿

ペリネイタルケア ( 2024冬季増刊 ) 96 - 98 2023.12

衛藤英理子, 増山寿

周産期医学 53 ( 12 ) 1695 - 1697 2023.12

Language：Japanese Publisher：(株)東京医学社

＜文献概要＞はじめに妊婦の健康と胎児の適正な発育のためには,妊娠前から産褥期にかけて「日本人の食事摂取基準」を満たす食生活により「妊娠中の体重増加の目安」の範囲内で体重をコントロールすることが望ましい。しかしながら,日本人女性にはやせ,エネルギー過少,栄養バランスの偏りなどの問題があり,体重指導は容易ではない。本稿では妊娠中の体重指導の在り方の変遷と,妊娠前体格や食生活の現状を概説する。

Other Link： https://search.jamas.or.jp/default/link?pub_year=2023&ichushi_jid=J00621&link_issn=&doc_id=20240116160006&doc_link_id=%2Faq9syuse%2F2023%2F005312%2F004%2F1695-1697%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Faq9syuse%2F2023%2F005312%2F004%2F1695-1697%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

Not taking sick leave for gynecologic cancer treatment is negatively associated with returning to the same workplace. International journal

Keiichiro Nakamura, Hirofumi Matsuoka, Kotaro Kubo, Shinsuke Shirakawa, Naoyuki Ida, Junko Haraga, Chikako Ogawa, Kazuhiro Okamoto, Shoji Nagao, Hisashi Masuyama

Japanese journal of clinical oncology 54 ( 3 ) 292 - 296 2023.11

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Gynecologic cancers are one of the most common types of malignancies in working-age women. We aimed to determine the factors that impede women from returning to the same workplace after treatment for such cancers. METHODS: A questionnaire-based survey was conducted on 194 women who underwent treatment for gynecologic cancer at the Okayama University (≥1 year after cancer treatment and <65 years of age). We performed a logistic regression analysis to determine the relationship between returning to the same workplace and not taking sick leave. RESULTS: The median age at diagnosis was 49.0 years, and the median time from cancer treatment to questionnaire completion was 3.8 years. Not returning to the same workplace was positively associated with not being regularly employed (P = 0.018), short work time per day (P = 0.023), low personal income (P = 0.004), not taking sick leave (P < 0.001), advanced cancer stage (P = 0.018) and long treatment time (P = 0.032). Interestingly, not taking sick leave was strongly associated with not returning to the same workplace in the multivariable analysis (P < 0.001). CONCLUSIONS: Not taking sick leave likely was negatively associated with returning to the same workplace after the treatment for gynecologic cancer. Therefore, we suggest that steps be taken to formally introduce a sick leave system over and above the paid leave system in Japan.

DOI： 10.1093/jjco/hyad159

【婦人科悪性腫瘍手術-トラブルシューティングとその予防法-】準広汎子宮全摘術

依田尚之, 長尾昌二, 増山寿

産婦人科の実際 72 ( 12 ) 1276 - 1284 2023.11

Partner relationships, hopelessness, and health status strongly predict maternal well-being: an approach using light gradient boosting machine. International journal

Hikaru Ooba, Jota Maki, Takahiro Tabuchi, Hisashi Masuyama

Scientific reports 13 ( 1 ) 17032 - 17032 2023.10

Language：English Publishing type：Research paper (scientific journal)

No recent study has explicitly focused on predicting the well-being of pregnant women. This study used data from an extensive online survey in Japan to examine the predictors of the subjective well-being of pregnant women. We developed and validated a light Gradient Boosting Machine (lightGBM) model using data from 400 pregnant women in 2020 to identify three factors that predict subjective well-being. The results confirmed that the model could predict subjective well-being in pregnant women with 84% accuracy. New variables that contributed significantly to this prediction were "partner help", "hopelessness," and "health status". A new lightGBM model was built with these three factors, trained and validated using data from 400 pregnant women in 2020, and predicted using data from 1791 pregnant women in 2021, with an accuracy of 88%. These factors were also significant risk factors for subjective well-being in the regression analysis adjusted for maternal age, region, parity, education level, and the presence of mental illness. Mediation analysis, with "hopelessness" as the mediator, showed that both "partner help" and "health status" directly and indirectly affected the outcome.

DOI： 10.1038/s41598-023-44410-1