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Effects of pre-pubertal exposure to phthalate and phosphorous flame retardants on pubertal developments in Japanese children

Research Project

Project/Area Number 19K20457
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 63030:Chemical substance influence on environment-related
Research InstitutionHokkaido University

Principal Investigator

Ait Bamai Yu  北海道大学, 環境健康科学研究教育センター, 特任講師 (90752907)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsフタル酸エステル / リン酸トリエステル / 二次性徴 / コーホート研究 / バイオモニタリング / 複合曝露 / Phthalates / Alternative plasticizers / Pubertal onset / Children's health / Biomonitoring / Birth cohort / フタル酸エルテル代替化合物 / 可塑剤難燃剤 / フタル酸エステル類 / 難燃剤 / 第二次性徴
Outline of Research at the Start

プラスチックの可塑剤や難燃剤として日用品に汎用されるリン系難燃剤とフタル酸エステル類は、同様の曝露源・曝露経路を有し、恒常的かつ複合的な曝露による健康影響が懸念されている。本研究では、性腺機能が未成熟な思春期前のリン系難燃剤およびフタル酸類の曝露またその複合曝露によるその後の第二次性徴発来へ及ぼす影響を解明することを目的とする。児の第二次性徴は調査票を用い、リン系難燃剤とフタル酸類は、児の尿中代謝物濃度をLCMSMSを用い測定する。思春期前の曝露に着目し、第二次性徴発来への影響を評価する点に加え、個別の影響のみならず複合曝露も検討した研究はこれまでにない。

Outline of Final Research Achievements

The aim of this study was to prospectively examine the effects of single and combined exposure to PFRs and phthalates before puberty on the onset of pubertal development in children in the prospective birth cohort, the Hokkaido Study. The outcomes of pubertal development children at the age of 12 years were assessed from the 12-year-old questionnaire; 10 urinary metabolites of phthalate were determined by LC-MS/MS from first morning void urine samples collected at the age of 7 years.
The results of the present study are consistent with previous findings showing that exposure to phthalates delays the onset of puberty. However, caution is needed in interpreting the results as the exposure was assessed in urine at one point in time at the age of 7 years. Future studies will examine the effects of combined exposure to other chemicals for which exposure assessments have been completed in 7-year-old children.

Academic Significance and Societal Importance of the Research Achievements

本研究は、思春期発来前のフタル酸エステル類曝露によるその後の二次性徴発来への影響を検討した日本初の研究である。プラスチック可塑剤やパーソナルケア製品に含まれるDnBP、BBzPによる二次性徴発来遅延の関連性を示した。二次性徴発来の遅延は生殖能力や乳がん等の疾患に影響することが知られている。より詳細な検討や更なる科学的知見の蓄積が必要であるが、将来的にはこれらの知見を基に近年増加している生殖能力および妊孕性の低下、乳がん等の予防医学への貢献、ならびに製品への使用規制等、政策への提言に貢献することができる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (24 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (9 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Book (2 results) Remarks (2 results)

  • [Int'l Joint Research] Toxicological Center/Universitiy of Antwerp(ベルギー)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Antwerp(ベルギー)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Phthalates mixture on allergies and oxidative stress biomarkers among children: The Hokkaido study2022

    • Author(s)
      Ketema Rahel Mesfin、Ait Bamai Yu、Miyashita Chihiro、Saito Takeshi、Kishi Reiko、Ikeda-Araki Atsuko
    • Journal Title

      Environment International

      Volume: 160 Pages: 107083-107083

    • DOI

      10.1016/j.envint.2022.107083

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Secular trends of urinary phthalate metabolites in 7-year old children and association with building characteristics: Hokkaido study on environment and children's health2021

    • Author(s)
      Ketema Rahel Mesfin、Ait Bamai Yu、Ikeda-Araki Atsuko、Saito Takeshi、Kishi Reiko
    • Journal Title

      International Journal of Hygiene and Environmental Health

      Volume: 234 Pages: 113724-113724

    • DOI

      10.1016/j.ijheh.2021.113724

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hokkaido birth cohort study on environment and children’s health: cohort profile 20212021

    • Author(s)
      Kishi Reiko、Ikeda-Araki Atsuko、Miyashita Chihiro、Itoh Sachiko、Kobayashi Sumitaka、Ait Bamai Yu、Yamazaki Keiko、Tamura Naomi、et al.
    • Journal Title

      Environmental Health and Preventive Medicine

      Volume: 26 Issue: 1 Pages: 1-20

    • DOI

      10.1186/s12199-021-00980-y

    • NAID

      210000159057

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Temporal trends and determinants of PFR exposure in the Hokkaido Study2020

    • Author(s)
      Bastiaensen Michiel、Ait Bamai Yu、Araki Atsuko、Goudarzi Houman、Konno Satoshi、Ito Sachiko、Miyashita Chihiro、Yao Yiming、Kishi Reiko、Covaci Adrian
    • Journal Title

      International Journal of Hygiene and Environmental Health

      Volume: 228 Pages: 113523-113523

    • DOI

      10.1016/j.ijheh.2020.113523

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Biomonitoring and temporal trends of bisphenols exposure in Japanese school children2020

    • Author(s)
      Gys Celine、Ait Bamai Yu、Araki Atsuko、Bastiaensen Michiel、Caballero-Casero Noelia、Kishi Reiko、Covaci Adrian
    • Journal Title

      Environmental Research

      Volume: 191 Pages: 110172-110172

    • DOI

      10.1016/j.envres.2020.110172

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Combined exposure to phthalate esters and phosphate flame retardants and plasticizers and their associations with wheeze and allergy symptoms among school children2020

    • Author(s)
      Araki Atsuko、Ait Bamai Yu、Bastiaensen Michiel、Van den Eede Nele、Kawai Toshio、Tsuboi Tazuru、Miyashita Chihiro、Itoh Sachiko、Goudarzi Houman、Konno Satoshi、Covaci Adrian、Kishi Reiko
    • Journal Title

      Environmental Research

      Volume: 183 Pages: 109212-109212

    • DOI

      10.1016/j.envres.2020.109212

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Association between perfluoroalkyl substance exposure and thyroid hormone/thyroid antibody levels in maternal and cord blood: The Hokkaido Study2019

    • Author(s)
      Itoh Sachiko、Araki Atsuko、Miyashita Chihiro、Yamazaki Keiko、Goudarzi Houman、Minatoya Machiko、Ait Bamai Yu、Kobayashi Sumitaka、Okada Emiko、Kashino Ikuko、Yuasa Motoyuki、Baba Toshiaki、Kishi Reiko
    • Journal Title

      Environment International

      Volume: 133 Pages: 105139-105139

    • DOI

      10.1016/j.envint.2019.105139

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multiple exposures to organophosphate flame retardants alter urinary oxidative stress biomarkers among children: The Hokkaido Study2019

    • Author(s)
      Ait Bamai Yu、Bastiaensen Michiel、Araki Atsuko、Goudarzi Houman、Konno Satoshi、Ito Sachiko、Miyashita Chihiro、Yao Yiming、Covaci Adrian、Kishi Reiko
    • Journal Title

      Environment International

      Volume: 131 Pages: 105003-105003

    • DOI

      10.1016/j.envint.2019.105003

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Biomonitoring of organophosphate flame retardants and plasticizers in children: Associations with house dust and housing characteristics in Japan2019

    • Author(s)
      Bastiaensen Michiel、Ait Bamai Yu、Araki Atsuko、Van den Eede Nele、Kawai Toshio、Tsuboi Tazuru、Kishi Reiko、Covaci Adrian
    • Journal Title

      Environmental Research

      Volume: 172 Pages: 543-551

    • DOI

      10.1016/j.envres.2019.02.045

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 学童のプラスチック添加剤への曝露実態 :北海道スタディ2022

    • Author(s)
      池田敦子, アイツバマイゆふ, Ketema R. M., Gys C., Bastiaensen M., Covaci A., 岸玲子
    • Organizer
      第92回日本衛生学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Intake of phosphate flame retardants from short and long-term accumulated house dust and asthma and allergies among children: Hokkaido Study2021

    • Author(s)
      Ikeda-Araki A., Bekki K., Ait Bamai Y., Inaba Y. , Kim H., Kishi R.
    • Organizer
      33rd Annual Conference of the International Society for Environmental Epidemiology / ISEE 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exposure to phthalate esters and phosphate flame retardants concentrations in house dust, urinary metabolite, and their association with allergies2021

    • Author(s)
      Ikeda-Araki A., Ait Bamai Y., Kishi R.
    • Organizer
      The 5th International Symposium for Persistent, Bio-accumulating and Toxic Substances (5th PBTS)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of prenatal exposure to perfluoroalkyl substances (PFAS) on childhood allergies: The Hokkaido Study2019

    • Author(s)
      Ait Bamai Y., Goudarzi H., Okada E., Araki A., Miyashita C., Matsuura H., and Kishi R.
    • Organizer
      Dioxin 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Associations between Exposure to Bisphenols and Wheeze and Oxidative Stress Biomarkers In 7-Years Old Children: The Hokkaido Study2019

    • Author(s)
      Yu Ait Bamai, Celine Gys, Atsuko Araki, Noelia Caballero-Casero, Adrian Covaci, Reiko Kishi
    • Organizer
      ISEEISES-AC 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exposure to organophosphate esters in Japan: associations among their concentrations in house dust, urinary metabolite levels, and allergies2019

    • Author(s)
      Atsuko Araki, Yu Ait Bamai, Reiko Kishi
    • Organizer
      ISESISIAQ-2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Monitoring exposure levels to bisphenols for Japanese schoolchildren2019

    • Author(s)
      Gys Celine, Ait Bamai Yu, Araki Atsuko, Caballero-Casero Noelia, Covaci Adrian
    • Organizer
      ISESISIAQ-2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Short-term temporal variability in urinary biomarkers of phosphate flame retardants (PFRs) and alternative plasticizers (APs)2019

    • Author(s)
      Michiel Bastiaensen, Celine Gys, Govindan Malarvannan, Mihai Fotache, Yu Ait Bamai, Atsuko Araki, Adrian Covaci
    • Organizer
      ISESISIAQ-2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Urinary phthalate metabolites And oxidative stress biomarkers in 7 years old children from Hokkaido.2019

    • Author(s)
      Ketema Rahel Mesfin, Ait Bamai Yu, Araki Atsuko, Saito Takeshi, Kishi Reiko
    • Organizer
      ISEEISES-AC 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] Semi-Volatile Organic Compounds (SVOCs): Phthalates and Phosphorous Frame Retardants and Health Risks. In, Indoor Environmental Quality and Health Risk toward Healthier Environment for All.2019

    • Author(s)
      Yu Ait Bamai
    • Total Pages
      29
    • Publisher
      Springer Nature
    • Related Report
      2019 Research-status Report
  • [Book] Aldehydes, volatile organic compounds (VOCs), and health. Indoor Environmental Quality and Health Risk toward Healthier Environment for All.2019

    • Author(s)
      Atsuko Araki, Rahel Mesfin Ketema, Yu Ait Bamai, Reiko Kishi
    • Total Pages
      19
    • Publisher
      Springer Nature
    • Related Report
      2019 Research-status Report
  • [Remarks] 北海道大学 環境健康科学研究教育センター 研究業績・成果

    • URL

      https://www.cehs.hokudai.ac.jp/research

    • Related Report
      2021 Annual Research Report
  • [Remarks] 環境と健康に関する研究・北海道スタディ

    • URL

      https://www.cehs.hokudai.ac.jp/hokkaidostudy/outcome/

    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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