Molecular Mechanisms in Endothelial Cell Regulation

The endothelium lining the vasculature orchestrates critical processes including angiogenesis, barrier integrity, blood pressure control and inflammatory responses. At the molecular level, endothelial cells respond to biochemical cues such as vascular endothelial growth factor (VEGF), transforming growth factor-β (TGF-β) and complement components through receptor tyrosine kinases, G-protein-coupled receptors and complement receptors. Downstream signalling via phosphoinositide 3-kinase (PI3K)/Akt, mitogen-activated protein kinases and Smad proteins regulates cell survival, proliferation and migration. Mechanotransduction of shear stress involves PECAM-1, VE-cadherin and the actin cytoskeleton, enabling the endothelium to adapt its barrier function and nitric oxide production in response to blood flow. Transcription factors such as FOXO1 and Kruppel-like factors integrate upstream signals to control gene programmes for quiescence or reparative angiogenesis. Epigenetic modifiers, including enhancer of zeste homolog 2, fine-tune endothelial identity and plasticity, while non-coding RNAs contribute dynamic regulation under physiological and pathological conditions. Dysregulation of these molecular pathways underlies diseases such as atherosclerosis, diabetic retinopathy, hypertension and acute lung injury. Elucidating the interplay among signalling cascades, junctional complexes and the mechanical microenvironment in endothelial cells informs strategies for vascular repair, targeted anti-angiogenic therapies and the engineering of functional blood vessels.

Research from Nature Portfolio

A robust enzymatic and immunomagnetic protocol has been developed for isolating primary mouse lung endothelial cells with high purity and preserved functionality. This method employs collagenase digestion followed by sequential selection with antibodies against PECAM-1 and ICAM-2, yielding cells that maintain characteristic markers and functional assays such as oxidised LDL uptake and monocyte adhesion. The approach streamlines studies of barrier permeability, mechanotransduction and inflammatory interactions in genetically modified mouse models, thereby accelerating investigation of endothelial phenotypes in vascular disease.

Molecular Mechanisms in Endothelial Cell Regulation publication trend

The graph below shows the total number of articles in molecular mechanisms in endothelial cell regulation across all publications each year (not limited to Nature Index journals).

Technical terms

Endothelium: The single-cell lining of blood and lymphatic vessels that regulates exchange, vascular tone and immune cell trafficking.

Angiogenesis: The formation of new blood vessels from existing vasculature, essential for growth, repair and certain pathologies.

PI3K/Akt pathway: A conserved intracellular signalling cascade that promotes cell survival, growth and metabolism in response to extracellular stimuli.

Mechanotransduction: The process by which cells convert mechanical forces, such as shear stress from blood flow, into biochemical signals.

Complement complex C5b-9: The terminal assembly of the complement cascade that can induce sublytic signalling in endothelial and other cells.

RGC32: Response Gene to Complement 32, a regulator of cell cycle progression, apoptosis and endothelial activation under pathological conditions.

References

1. A simple protocol for isolating mouse lung endothelial cells. Scientific Reports (2019).
2. C5b-9-induced Endothelial Cell Proliferation and Migration Are Dependent on Akt Inactivation of Forkhead Transcription Factor FOXO1*. Journal of Biological Chemistry (2006).
3. Loss of Response Gene to Complement 32 (RGC-32) in Diabetic Mouse Retina Is Involved in Retinopathy Development. International Journal of Molecular Sciences (2018).
4. Response Gene to Complement 32 in Vascular Diseases. Frontiers in Cardiovascular Medicine (2018).