Abstract
To determine the changes in salivary chromogranin A (CgA) levels upon awakening in response to of stress by investigating the relationship between salivary CgA levels and the stress response as assessed by GHQ-28 tests. The study cohort comprised 40 healthy male university students (age range 19-22 years). Salivary CgA levels were measured at 7:00 a.m. (awakening) and at 7:30, 8:00, and 8:30 a.m. (after awakening). The salivary CgA level was 0.91 ± 0.20 and 0.42 ± 0.1 pmol/ml at 7:00 a.m. in students scoring low (n = 26) and high (n = 14), respectively, on the "severe depression" subscale. This difference in salivary CgA levels at 7:00 between high and low scorers was statistically significant (p < 0.05). Our findings indicate that depression may influence secretions of salivary CgA via chronic stress-related attenuation of the sympathetic-adrenomedullary system activity.
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