The G Protein-Coupled Receptor Latrophilin-2, A Marker for Heart Development, Induces Myocardial Repair After...

Area of Science:

• Cardiovascular Biology
• Developmental Biology
• Regenerative Medicine

Background:

• Identifying specific cell-surface markers is key for isolating pure cell populations for therapeutic applications.
• Latrophilin-2 (Lphn2) is known to play a role in cardiac differentiation.

Purpose of the Study:

• To investigate the role of Lphn2 in heart development and repair.
• To evaluate Lphn2 as a potential cardiomyogenic marker for cardiac regeneration therapies.

Main Methods:

• Whole-mount immunostaining and clearing of embryos.
• RNA sequencing of Lphn2-knockout (KO) embryos.
• In vivo functional analysis of Lphn2+ cells using echocardiography.
• Transplantation of pluripotent stem cell (PSC)-derived Lphn2+ cells into infarcted hearts.

Main Results:

• Lphn2 is exclusively expressed in cardiac cells during embryonic development (E9.5-E10.5).
• Lphn2-KO mice exhibit embryonic lethality and underdeveloped ventricular myocardium.
• Transplanted PSC-derived Lphn2+ cells differentiate into cardiomyocytes, regenerate myocardium, improve cardiac function, and reduce infarct size in vivo.
• Lphn2 is not essential for vascular development.

Conclusions:

• Lphn2 is a critical regulator of heart development and a promising cardiomyogenic marker.
• Targeting Lphn2+ cells holds potential for effective stem cell therapy in clinical heart repair.