Therapeutic Effect of Controlled Release of Dual Growth Factor Using Heparin-Pluronic Hydrogel/Gelatin-Poly (Ethylene Glycol)-Tyramine Hydrogel System in a Rat Model of Cavernous Nerve Injury

Tissue Engineering. Part a
Ae Ryang JungJi Youl Lee

Abstract

The number of cases of erectile dysfunction (ED) caused after radical prostatectomy (RP) prostate cancer treatment is increasing steadily. Although various studies have been conducted for treatment of post-RP ED, there is still a need for more effective methods. A dual growth factor incorporated heparin-pluronic/gelatin-poly(ethylene glycol)-tyramine (HP/GPT) hydrogel, which consists of a basic fibroblast growth factor (bFGF)-loaded HP hydrogel and nerve growth factor (NGF)-loaded GPT hydrogel, can control dose and rate of growth factor release. In this study, we demonstrated that dual growth factor incorporated HP/GPT hydrogel could further improve erectile function in a rat model of bilateral cavernous nerve injury (BCNI). We showed that erectile function was decreased after BCNI, but it was further improved by treatment with a dual growth factor incorporated HP/GPT hydrogel compared with groups treated with single growth factor in a rat model of cavernous nerve injury. Also, we observed an increase in cyclic guanosine monophosphate (cGMP) levels in the dual growth factor group when compared with the groups treated with single growth factor. This effect was associated with greater upregulation of nitric oxide synthase and end...Continue Reading

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