Antihypertensive Agents/pharmacology; Arterial Pressure/drug effects; Glycyrrhizic Acid/pharmacology; HMGB1 Protein/antagonists & inhibitors; Hypertension, Pulmonary/prevention & control; Monocrotaline; Pulmonary Artery/drug effects; Vascular Remodeling/drug effects; Animals; Cell Proliferation/drug effects; Cells, Cultured; Disease Models, Animal; Dose-Response Relationship, Drug; Endothelin-1/metabolism; HMGB1 Protein/metabolism; Humans; Hypertension, Pulmonary/chemically induced; Hypertension, Pulmonary/metabolism; Hypertension, Pulmonary/pathology; Hypertension, Pulmonary/physiopathology; Hypertrophy, Right Ventricular/metabolism; Hypertrophy, Right Ventricular/physiopathology; Hypertrophy, Right Ventricular/prevention & control; Male; Muscle, Smooth, Vascular/drug effects; Muscle, Smooth, Vascular/metabolism; Muscle, Smooth, Vascular/pathology; Pneumonia/metabolism; Pneumonia/physiopathology; Pneumonia/prevention & control; Pulmonary Artery/metabolism; Pulmonary Artery/pathology; Pulmonary Artery/physiopathology; Rats, Sprague-Dawley; Time Factors; Ventricular Dysfunction, Right/metabolism; Ventricular Dysfunction, Right/physiopathology; Ventricular Dysfunction, Right/prevention & control; Ventricular Function, Right/drug effects