Differential proteins in each rat can be enriched into some important biological processes and pathways associated with hypertension, such as the regulation of systemic arterial blood pressure by renin-angiotensin, renin-angiotensin signaling, response to glucocorticoid and glucocorticoid receptor signaling, calcium transport I, aldosterone adipocyte signaling pathway, apelin adipocyte signaling pathway, and oxidative stress response. Here, APLN is linked to hypertensive disorder.