Journal of Ocean University of China

, Volume 18, Issue 1, pp 253–259 | Cite as

The Inhibitory Effects of PSS-Loaded Nanoparticles on the Dysfunction of Cardiac Microvascular Endothelia in Rats with Diabetic Cardiomyopathy

  • Nina An
  • Luyan Yu
  • Yi Hu
  • Wenjing Feng
  • Shujuan Shi
  • Honghua ChenEmail author
  • Yongjun MaoEmail author


Propylene glycol alginate sodium sulfate-loaded nanoparticles (PSS-NP) has been shown potential to prevent the microvascular endothelial injuries caused by diabetic cardiomyopathy (DCM). In this study, we aimed to investigate the effects of PSS-NP on the dysfunction of cardiac microvascular endothelia in streptozotocin (STZ)-induced DCM rat model. Echocardiographic measurements showed a significant improvement of cardiac function in the PSS-NP-treated group. Our results revealed that the abnormalities of cardiac systolic and diastolic functions were suppressed by the treatments of prostaglandin E1 (PGE1), low molecular weight heparin (LMWH), PSS and PSS-NP. Our comparison analysis indicated that PSS-NP showed the strongest inhibitory effects on microvascular endothelial injuries. Transmission electron microscopy analysis demonstrated that PSS-NP protected the cardiac microvascular endothelium and further improved endothelium dysfunction in DCM rats. ELISA and Western blot assays further showed a high efficiency of improving cardiac microvascular endothelial dysfunction with PSS-NP. Our results demonstrated that PSS-NP increased the protein expression of phosphatidylinositol 3-kinase (PI3K)-p85 and vascular endothelial growth factor (VEGF)-A, and the phosphorylation of protein kinase B (Akt) and endothelial nitric oxide synthase (eNOS), which were involved in the amelioration of cardiac microvascular endothelial dysfunction. These data suggest that PSS-NP may be a novel approach to the treatment the coronary microcirculation disorder diseases such as DCM.

Key words

PSS-loaded nanoparticles marine drug DCM microvascular endothelial dysfunction 


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This research was supported by grants from the National Natural Science Foundation Project of China (NSFC) (No. 31571829 and No. 31640050) and the People’s Livelihood Science and Technology Project Financially Supported by Qingdao city (No. 15-9-2-75-nsh).


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Copyright information

© Science Press, Ocean University of China and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Geriatricsthe Affiliated Hospital of Qingdao UniversityQingdaoChina

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