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2023 Fiscal Year Final Research Report

Elucidation of mechanisms in transcriptional regulation on immune tolerance of the human endometrium

Research Project

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Project/Area Number 21K09529
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionKansai Medical University

Principal Investigator

MURATA Hiromi  関西医科大学, 医学部, 講師 (00460832)

Co-Investigator(Kenkyū-buntansha) 岡田 英孝  関西医科大学, 医学部, 教授 (80330182)
田中 進  長崎県立大学, 看護栄養学部, 教授 (30399472)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywords脱落膜化 / 子宮内膜間質細胞 / LGALS9
Outline of Final Research Achievements

To elucidate the molecular interaction between uterine natural killer cells and human endometrial stromal cells (ESCs) in the human decidua, we focused on the expression of galectin 9 (LGALS9), an immune checkpoint molecule secreted by ESCs. We found that Heart and neural crest derivatives expressed transcript 2(HAND2)and Forkhead box O1(FOXO1)phosphorylation, the important transcriptional factors in decidualized stromal cells, regulate LGALS9 expression. Furthermore, it is showed that increased phosphorylated FOXO1 unleashed the suppression of LGALS9 expression, and HAND2 more increased LGALS9 expression.

Free Research Field

産婦人科

Academic Significance and Societal Importance of the Research Achievements

LGALS9はHepatitis A virus cellular receptor 2(HAVCR2)を介して子宮ナチュラルキラー細胞を抑制する。脱落膜化過程でヒト子宮内膜間質細胞が分泌するLGALS9と子宮ナチュラルキラー細胞膜上のHAVCR2とが相互作用することによって、抗炎症または免疫寛容に重要な役割を果たしている可能性が示唆された。またヒト子宮内膜における内分泌機構が免疫機構を制御する分子メカニズムの一端を解明することができた。

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Published: 2025-01-30  

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