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関連する概念動画

Parental Care00:55

Parental Care

13.2K
Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
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Transcytosis of IgG01:15

Transcytosis of IgG

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Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
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Distributed Loads01:19

Distributed Loads

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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
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Teratogenicity01:07

Teratogenicity

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The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
4.6K
Fetal Circulation01:14

Fetal Circulation

5.0K
Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
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Development of the Oral Microbiota01:28

Development of the Oral Microbiota

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The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
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Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus
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Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus

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小さな助手は,母親の負担を軽くする.

Detlef Weigel1, Elisa Izaurralde

  • 1Max Planck Institute for Developmental Biology, D-72076 Tübingen, Germany. weigel@weigelworld.org

Cell
|March 28, 2006
PubMed
まとめ
この要約は機械生成です。

タンパク質ではなくマイクロRNAが,動物の発達初期に母親のmRNAを破壊する. このマイクロRNAは,芽細胞の中間移行時に転写され,重要な発達パズルを解く.

さらに関連する動画

Author Spotlight: Exploring Microglial Interactions with Stress-Response Circuitry Using the Limited Bedding and Nesting Model
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Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization
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Last Updated: Apr 19, 2026

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Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus

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Author Spotlight: Exploring Microglial Interactions with Stress-Response Circuitry Using the Limited Bedding and Nesting Model
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Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization
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科学分野:

  • 発達生物学 発達生物学について
  • 分子生物学は分子生物学である.
  • 遺伝学 遺伝学とは

背景:

  • 初期の動物の胚形成には,遺伝子発現の正確な調節が含まれています.
  • ミッドブラストラトランジション (MBT) は,ジゴティック遺伝子の活性化が始まる重要な段階です.
  • 母子のメッセンジャーRNAs (mRNAs) の調整破壊は,MBTで起こりますが,そのメカニズムは不明でした.

研究 の 目的:

  • 母親のmRNAsの協調的な破壊に責任を負う分子エージェントを特定する.
  • ミッドブラスチュラ移行時のmRNAの分解を制御するメカニズムを解明する.

主な方法:

  • 初期胚形成中の遺伝子発現パターンの分析.
  • 小型の非コーディングRNAの識別と特徴付け.
  • 識別されたRNAのmRNA分解における役割を決定する機能的測定法.

主要な成果:

  • 特定のマイクロRNAが鍵となる因子として特定されました.
  • このマイクロRNAは,真ん中の芽細胞の移行時に正確に転写されます.
  • マイクロRNAは,多数の母性mRNAの分解を直接媒介する.

結論:

  • タンパク質ではなく,マイクロRNAが,母子のmRNAのクリアランスを,芽細胞の中間移行時に調整する.
  • この発見は,動物の初期の発達における新しい規制メカニズムを明らかにしています.
  • この研究は,発達生物学における長年のパズルを解決する.