臓器は残らない:腸の発達と進化の物語

Didier Y R Stainier¹

¹Department of Biochemistry and Biophysics, Programs in Developmental Biology, Genetics and Human Genetics, University of California, San Francisco, San Francisco, CA 94143-2711, USA. didier_stainier@biochem.ucsf.edu

Science (New York, N.Y.)

|March 26, 2005

まとめ

この研究は,腸の複雑な発達,その大きさと食事との相互作用のためにユニークな課題に直面する重要な臓器を探索します. 腸のパターンを理解することは,その機能と全体的な健康の鍵です.

科学分野:

発達生物学発達生物学とは
胃腸内科胃腸内科
オルガノゲネシスオルガノゲネシス

背景:

臓器の機能は,細胞の組成と組織に依存しています.
発達中の腸は,その大きさ,長さ,および外部の食事要因との絶え間ない相互作用により,ユニークな発達上の課題を提示します.
腸の深い解剖学的な位置は,その形成に関する研究を歴史的に制限しています.

研究の目的:

発達中の腸の複雑なパターンを調査するために.
腸の縦軸,背中軸,左右軸,半径軸を制御する発達過程を理解する.
腸の機能とホメオスタシスのための腸の発達の重要性を強調する.

主な方法:

この研究は,腸の発達に関する既存の研究を統合しています.
比較胚学と発達遺伝学の原理を活用しています.
腸形成に関する解剖学的および組織学的データをレビューします.

主要な成果:

腸の発達には複雑な軸のパターンが含まれる.
細胞の組み立てと組織化は,腸の機能に不可欠です.
ダイエット要因は,腸の発達とホメオスタシスに大きな影響を与えます.

結論:

発達中の腸のパターンは,重要な研究分野である.
腸の形成と機能を完全に理解するためには,さらなる研究が必要である.
腸の発達を理解することは,胃腸の健康と疾患に対処するために不可欠です.

さらに関連する動画

06:46

Mouse Fetal Whole Intestine Culture System for Ex Vivo Manipulation of Signaling Pathways and Three-dimensional Live Imaging of Villus Development

Published on: September 4, 2014

07:23

Innervation of Human Intestinal Organoids

Published on: January 17, 2025

関連する概念動画

01:23

Anatomy of the Intestines

Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the small...

01:56

Gastrulation

Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...

01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...

01:15

Development of the Sexual Organs in the Embryo and Fetus

Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...

01:30

Development of Human Microbiota

The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...

01:28

Development of the Oral Microbiota

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,...

関連する実験動画