Table 5.

Determination of the endogenous content of miRNA-21 (in amol per ng of RNA_t) in human cells and breast tissues.

Sample		miRNA-21 (n = 3)	T/NT * Ratio	Contents Found by Other Authors
Cells	MCF-10A	0.79 ± 0.14	2.95	0.93 [35]
				1.02 [25]
	MCF-7	2.33 ± 0.54		3.3 [35]
				3.1 [25]
Breast tissues	NT1	0.94 ± 0.12	2.06–2.99	0.1−1.5 [35]
	NT2	0.80 ± 0.20
	T1	2.81 ± 0.43		0.4−3.0 [35]
	T2	1.65 ± 0.20

* miRNA-21 amount found in tumoral (T) vs non-tumoral (NT) tissues ratio.