Capillary communication: the role of capillaries in sensing the tissue environment, coordinating the microvascular, and controlling blood flow.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic physiological concepts without systematic search or primary human data.
PubMed 36149771 · doi:10.1152/ajpheart.00088.2022
What was done
This narrative review summarizes physiological evidence on the sensory and signaling roles of capillaries. It examines mechanistic studies from skeletal muscle and brain microvasculature regarding how capillaries detect signals from surrounding tissue cells and communicate with upstream and downstream vascular segments to coordinate blood flow responses.
What was found
The abstract reports no numerical data, effect sizes, or statistical findings. It qualitatively describes mechanisms whereby capillaries sense tissue activity products, transmit signals across microvascular networks, and modulate blood flow, alongside the potential role of capillary communication failure in pathophysiology.
Why it matters
This paper outlines the conceptual shift viewing capillaries not merely as passive sites of nutrient exchange, but as active signaling hubs that regulate microvascular hemodynamic responses.
Limits
The paper is a narrative review without systematic search criteria or meta-analytic synthesis. The abstract reports no empirical sample sizes, specific experimental models, or quantitative clinical outcomes.
Cited by
- supports Capillaries have walls that are only one cell thick.