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2023 Fiscal Year Final Research Report

Mechanisms of intestinal dysfunction in fetal growth restriction

Research Project

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Project/Area Number 22K20935
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0905:Surgery of the organs maintaining homeostasis and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Ichinose Mari  東京大学, 医学部附属病院, 助教 (60954849)

Project Period (FY) 2022-08-31 – 2024-03-31
Keywords腸管機能障害 / 胎児発育不全 / 妊娠高血圧腎症
Outline of Final Research Achievements

Fetal growth restriction (FGR), which is primarily caused by placental insufficiency, has been suggested to be associated with gastrointestinal dysfunction in the neonatal period. In the present study, we found that 22 (18.5%) of 119 preterm infants had intestinal dysfunction, indicating that FGR is a risk factor. In addition, the fetal small intestine of a model mouse with FGR and preeclampsia was analyzed. In FGR mice, shortening of the intestinal tract and reduction of epithelial secretory cells were observed. RNAseq identified 226 differentially expressed genes. Gene expression involved in intestinal immunity including lactotransferrin and mucosal immunity to external antigens was found to be decreased in FGR mice.

Free Research Field

産婦人科

Academic Significance and Societal Importance of the Research Achievements

早産児のうち、血流異常に長期間さらされたFGR児は、腸管機能障害のハイリスク群であることが同定され、慢性的な子宮内ストレスが出生後の腸管機能の脆弱性を引き起こしている可能性が示唆された。
また、マウスモデルを用いてFGRが腸管に与える組織・分子学的変化を検証し、FGRにより、仔の腸管発達は未熟な状態となり、出生後の食餌抗原暴露において脆弱になりやすいことが示された。PEモデルマウス腸管でラクトトランスフェリンなどの外的抗原からの保護に働く因子の発現が低下している傾向にあった。FGRにおける消化管機能障害を来す分子学的機構の一端が解明され、今後の治療戦略に寄与する可能性がある。

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Published: 2025-01-30  

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