関連する実験動画
Updated: Jul 8, 2026

10:14
An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney
Published on: November 1, 2018
グロメルーラ基底膜の構造的整合性は,腎臓内のラミニンの組織間堆積を決定する
Kohei Omachi1, Meei-Hua Lin2, Pongpratch Puapatanakul2
1Division of Nephrology, Washington University School of Medicine, St. Louis, MO 63110, USA; Laboratory for Tissue Microenvironment, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe 650-0047, Japan.
Cell reports
|February 19, 2026
まとめ
腎臓の球底膜 (GBM) の外皮ラミニン-α2は,局所細胞ではなく,循環から発生する. これは,哺乳類の基礎膜組成を調節する非細胞自律的なメカニズムを示しています.
科学分野:
- バイオケミストリー バイオケミストリー
- 細胞生物学 細胞生物学
- ネフロロジーはネフロロジーを用います.
背景:
- 基礎膜 (BM) は,組織構造と機能にとって極めて重要な細胞外マトリックス (ECM) である.
- 哺乳類のECMは,主に局所細胞によって生成されると考えられていた.
- アルポート症候群は,GBMの欠陥と未知のラミニン-α2源を含む.
研究 の 目的:
- 球底膜 (GBM) の外皮ラミニン-α2の起源を調査する.
- 哺乳類におけるBM組成に対する循環タンパク質の貢献を調査する.
主な方法:
- トランスジェニックモデルでCRISPR-Cas9遺伝子編集を活用した.
- GBMとメサンジウムにおけるタンパク質堆積を分析した.
主要な成果:
- GBMにおける子宮外ラミニン-α2は,循環から発生する.
- 循環源は,健康な腎臓でも,メサンジアルラミニン-α2に寄与する.
- GBMの整合性は,循環するタンパク質の組み込みに影響します.
結論:
- 哺乳類のBM組成は,トランス組織機構によって調節される.
- これは,ECMの生産に関する伝統的な見解に異議を唱える.
- BM調節のための新しい非細胞自律的経路を特定しました.
関連する概念動画
Basal Lamina are the Specialized Form of ECM
The basal lamina is a thin extracellular layer that lies underneath the cells and separates them from other tissues. The three layers of the basal lamina are lamina lucida, lamina densa and lamina reticularis. The basal lamina, a mixture of glycoproteins and collagen, provides an attachment site for the epithelium, separating it from underlying connective tissue. The framework of basal lamina has other essential proteins such as laminins mesh, perlecan, entactin, and type IV collagen.
Proteins...
Proteins...
Laminins are the Adhesive Proteins of Basal Lamina
Laminins are heterotrimeric proteins with high molecular mass found in the extracellular matrix. Each laminin molecule is composed of three chains, viz. alpha, beta, and gamma, coded by five, four, and three paralogous genes, respectively. Laminins are categories based on the compositions of the three chains.
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
Type IV Collagen of Basal Lamina
Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can exist in...
A type IV collagen molecule has six alpha chains which can exist in...
Integrins
Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Renal Corpuscle
The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Glomerular Filtration
The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.

