Glenn-Fontan procedure is essential to treat Single-ventricle congenital heart disease
However, Glenn surgery▶️loss of pulmonary arterial flow pulsatility & pulmonary vascular malformation
How?🤔
Here, in this fresh-on-the-shelf
@JCI_insight paper
Dr. Ondine Cleaver lab
@cleaverlab😎
👉Profiles biophysical alterations of right pulmonary artery flow in a rat model of Glenn surgery
Simultaneous drop of 1⃣Velocity 2⃣Pressure 3⃣Circumferential stretch
👉Dissects the transcriptomes of pulmonary arterial endothelial cells with Pulsatile vs Non-pulsatile
1⃣Flow/Shear
2⃣Pressure
3⃣Stretch
Several intriguing findings
👉Puls. Pressure & Stretch ⏬Proteasome ⏫mTOR
👉Puls. Stretch ⏫Notch HedgeHog
👉Puls. Flow & Pressure ⏫TGFβ
👉No impact on arteriovenous differentiation
👉Mechanosensitive, Dimension-specific
#Angiogcrine!!🤩
A critical in vivo relevance
Puls. Stretch-induced endothelial PDGFB maintains Pulmonary Arterial (not Venous) Smooth Muscle Cell Mass🤠
Does ECMO non-pulsatile flow cause similar mural-weakening issues?
insight.jci.org/articles/vie…