Efficacy of Adenovirus-mediated, miR-199a Nanoparticles on Expression of HSP27, HSP70, and Soluble Glycoprotein in Rats with Heart Failure.

Context • Heart failure (HF) refers to abnormal changes in the function of the body’s heart pump under the action of a variety of pathogenic factors. Due to the complex etiology and course of HF, current research on its etiology and pathogenesis hasn’t yet reached a clear conclusion. So, there are many manifestations of heart failure in patients, and there are also many changes in the treatment. Objectives • The study intended to evaluate the efficacy of adenovirus-mediated miR-199a nanoparticles (NPs) for heart failure (HF). Design • The research team performed an animal study. Setting • The study took place at Shanghai Pudong Hospital at Fudan University Pudong Medical Center in Shanghai, China. Animals • The animals were 40 healthy, adult, male, Sprague-Dawley (SD) rats. They were specific pathogenfree (SPF) grade SD rats, all weighing about 280 g and aged 7-8 weeks. Intervention • The research team: (1) induced HF using coronary artery ligation and established different HF models and (2) randomly divided the rats into two groups with 20 rats in each group—an experimental group, which received high-dose, microR-199a (miR-199a) NPs, and a control group, which received low-dose miR-199a NPs. The treatments occurred for seven days after the induction of HF. Outcome Measures • At baseline and postintervention, the research team measured the left ventricular ejection fraction (LVEF), left ventricular end diastolic diameter (LVEDD), left ventricular end systolic diameter (LVESD), diastolic and systolic left ventricular anterior wall (LVAW) thickness, left ventricular posterior wall (LVPW) thickness, and expression of heat shock protein 27 (HSP27), HSP70, soluble glycoprotein 130 (SGP130). The team analyzed and studied the effects of the adenovirus-mediated miR- 199a NP on that expression, based on the above indicators. Results • The miR-199a prepared with NPs had good specificity through observation. The expression of HSP27, SGP130 was significantly downregulated in the experimental group as compared to the control group (P < .05) and HSP70 was upregulated in the experimental group as compared to the control group (P < .05). The expression decreased, or increased, with an increase in the cardiac-function classification, with substantial differences between the control and experimental groups. Expression levels of HSP27, HSP70, and SGP in the experimental group were negatively correlated with those of controls and negatively correlated with the left ventricular end diastolic diameter (LVEDD), left ventricular end systolic diameter (LVESD), and left ventricular ejection fraction (LVEF). Conclusions • NP had good specificity. The miR-199a NP downregulated levels of HSP, which had a certain protective effect against HF and had a high clinicaladoption and promotion value. [ABSTRACT FROM AUTHOR]