Table 1.

Inorganic-based miRNA delivery systems.

Delivery System	miRNA	Therapeutic Application	Particle Size	Refs.
Gold-iron oxide NPs	anti-miR-21 miR-100	Glioblastoma	10–50 nm	[47]
Gold NPs	miR-21	Cancer	61.3 nm	[55]
Gold NPs	miR-34a miR-200a let7-a	Cancer	2 nm	[56]
Silica NPs	miR-34a	Neuroblastoma	N/A	[44]
Silica dioxide NPs	miR-34a	Breast cancer	12–18 nm	[53]

N/A: not applicable.