Rosmarinic Acid-Rich Extracts of Summer Savory (Satureja hortensis L.) Protect Jurkat T Cells against Oxidative Stress

Table 3

Effect of pretreatment of the Jurkat cells with partially purified S. hortensis rosmarinic acid fraction on the cellular response to subsequent hydrogen peroxide-induced oxidative stress.

	Hydrogen peroxide concentration, 𝜇M
	0	25	50
	Peroxyl radicals generation, EPR signal intensity (arbitrary units)
Nontreated control	0	3.0±0.2	3.8±0.3
Rosmarinic acid fraction	0	1.9±0.2^∗	2.1±0.3^∗
	Cell viability (MTT test results, A570)
Nontreated control	0.69±0.02	0.36±0.01	0.22±0.01
Rosmarinic acid fraction	0.75±0.04^∗	0.59±0.04^∗	0.37±0.03^∗

Values represent averages of five replications ± standard deviations. Values marked with the asterisk are significantly different from the control in the same column at 𝑃≤0.05, according to Student’s 𝑡-test.