Melatonin-Loaded Nanoparticles for Enhanced Antidepressant Effects and HPA Hormone Modulation

    May 2020 in “ Advances in Polymer Technology ”
    Min Si, Qianshu Sun, Hongcheng Ding, Chengcheng Cao, Mingwei Huang, Qian Wang, Hua Yang, Yi Yao
    TLDR Melatonin-loaded nanoparticles improve antidepressant effects and HPA hormone balance better than regular melatonin.
    The study investigated melatonin-loaded nanoparticles (MTNPs) for their potential in treating depressive-like behaviors and hypothalamus-pituitary-adrenal (HPA) axis dysregulation. MTNPs were characterized by their nanometer size, 15.77% drug loading, and 33.82% encapsulation efficiency, with controlled-release profiles varying across different pH environments. In vivo tests on pinealectomized rats demonstrated that MTNPs had superior antidepressant effects compared to free melatonin, as evidenced by reduced immobility time in the forced swimming test, increased saccharin preference, and improved HPA axis feedback. The study concluded that MTNPs offered an effective improvement in melatonin dosage form, meriting further evaluation.
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