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Effect of echinacoside administration on growth hormone secretion of pituitary cells. Growth hormone (GH) secretion from rat primary pituitary cells was measured after incubation with medium (control), GHRP-6 (GHSR agonist, 10−7 M), and various concentrations (from 10−8 to 10−5 M) of echinacoside (ECH) for 15 (A) and 30 min (B), respectively. Data were presented as means ± SD with n = 6. Significance levels seen by T Test were * p < 0.05 and ** p < 0.005 versus the control.
