Dendrimer-based drug delivery systems: history, challenges, and latest developments

Table 2 Surface charge-reversal chemistries

Charge Reversal	Stimuli	Refs
Negtive ⬇ Positive	pH	[45]


	Enzyme: γ-glutamyl transpeptidase (GGT)	[42, 85, 86]
Positive ⬇ Negtive	Enzyme: Glutathione (GSH)	[91]
Positive ⬇ Negtive	ROS	[90]
Positive ⬇ Neutral	pH	[92]

ISSN: 1754-1611