Iron contents (μg Fe per g tissue) in the left brain extracted from three groups of rats injected with PVP-SPIONs and DMPC/PVP-SPIONs after 24 h and 7 d.

Group		CON	PVP-SPIONs	DMPC/PVP-SPIONs
Substantia nigra	24 h	115.7 ± 43.0	486.8 ± 52.0	298.0 ± 35.7
	7 d		162.2 ± 62.7	133.8 ± 32.2
Temporal lobe	24 h	194.8 ± 31.8	225.8 ± 51.9	583.1 ± 48.0
	7 d		269.1 ± 60.6	332.1 ± 39.9
Frontal cortex	24 h	128.2 ± 47.7	174.4 ± 41.3	294.0 ± 58.4
	7 d		254.0 ± 41.1	198.9 ± 32.6