A detailed Methods section is available in the online supplement at http://circres.ahajournals.org.
Adenovirus expressing an enhanced green fluorescence protein (Ad-GFP), used as control, or both Ad-Cre and Ad-GFP (referred to as Ad-Cre) were microinjected bilaterally into the ARC of ObRflox/flox mice. Leptin activation of Stat3 was analyzed by immunohistochemistry. Recording of SNA was obtained in anesthetized mice. Obesity was induced by high fat (45% kcal) feeding for 10 weeks.