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2021 Fiscal Year Final Research Report

Effects of calorie restriction in utero on cerebral cortical histogenesis and postnatal behavior

Research Project

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Project/Area Number 19K08306
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionKeio University

Principal Investigator

Mitsuhashi Takayuki  慶應義塾大学, 医学部(信濃町), 講師 (80338110)

Co-Investigator(Kenkyū-buntansha) 高橋 孝雄  慶應義塾大学, 医学部(信濃町), 教授 (80171495)
久保 健一郎  東京慈恵会医科大学, 医学部, 教授 (20348791)
芝田 晋介  慶應義塾大学, 医学部(信濃町), 訪問教授 (70407089)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords神経発生 / 神経幹細胞 / 精神疾患 / 思春期
Outline of Final Research Achievements

In this analyses, we evaluated effects of calorie restriction in utero on cerebral cortical histogenesis together with postnatal behaviors in offspring. In previous report, we have found no change in the probability of leaving cell cycle (Q fraction) of neural stem cells and behaviors in the offspring of calorie-restricted group compared to those of controls. Thus, in this analysis, we analyzed 1) the cell cycle kinetics of neural stem cells in earlier phase of neuronogenesis, and 2) behaviors of postnatal adolescent mice that were exposed to calorie restriction. We found that the Q fraction was abnormally increased on embryonic day (E) 12 in the calorie-restricted group compared to that of controls. Additionally, we detected increased level of anxiety in the calorie-restricted group compared to that of controls. The abnormal behavior was observed during the age of adolescence and not in the young adult.

Free Research Field

医歯薬学

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的特色は、神経幹細胞の細胞周期調節機構と大脳皮質形成過程を胎児生体内において解析する点である。これら解析方法は煩雑で時間がかかる点が欠点であるが、培養細胞などと比較しより正常に近い状態で解析が行える点で重要な知見が得られる可能性が高い。また現在、日本人の出生体重が減少傾向にあり、若年女性のエネルギー摂取量の減少と高いやせ率が社会的問題となっている。同年代で妊娠した女性においても胎児が受け取るエネルギー量が減少している可能性が高く、本研究で得られた成果は妊娠期の食事制限が生後の子どもの神経発達に悪影響を及ぼす可能性を初めて示したものであり、大きな社会的意義があると考える。

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Published: 2023-01-30  

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