Expression of β1 Adrenergic Receptor in Vascular Anomalies in Children
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Objective: Controversial, heterogeneous, and inconsistent responses to beta-blockers have been reported in some cases of infantile proliferative hemangiomas. On the basis of these clinical observations, we aimed to examine the β1 adrenergic receptor (β1-AR) protein expression distribution among different types of pediatric vascular anomalies.
Methods: Immunohistochemistry (IHC) was performed for β1-AR on 43 surgical specimens.
Results: We found positive β1-AR IHC staining in all intramuscular hemangiomas, capillary-lymphatic, lymphatic, venous, and combined malformations, and Masson's tumor cases, as well as in 7 of 10 cases of proliferative infantile hemangiomas.
Conclusions: Our research demonstrates, for the first time, the degree of heterogeneous expression of β1-AR among pediatric vascular malformations. Our results support the need for β1-AR assessment in pediatric vascular anomalies to select cases with a robust response to β1-selective blockers. β1-AR assessment may have a strong impact on therapeutic refinement for pediatric vascular anomalies by selecting cases with a stronger response to beta-blockers.
Li W, McCurdy S, Lopez-Ramirez M, Lee H, Ginsberg M Elife. 2025; 13.
PMID: 39991834 PMC: 11849999. DOI: 10.7554/eLife.99455.
Li W, McCurdy S, Lopez-Ramirez M, Lee H, Ginsberg M bioRxiv. 2024; .
PMID: 38746306 PMC: 11092766. DOI: 10.1101/2024.05.05.592554.