
Salivary gland epithelial cells (SGECs) are vital cellular drivers in the pathogenesis of primary Sjögren's syndrome (SS); however, the mechanisms sustaining SGEC activation in primary SS remain unclear. We undertook this study to determine the role of autophagy in the survival and activation of SGECs in primary SS. SGECs from primary SS patients exhibited increased autophagy, increased expression of antiapoptotic molecules, and reduced apoptosis compared to samples from patients with sicca syndrome. In addition, autophagy correlated with histologic disease severity. In primary SS SGECs, inflammation induces autophagy and prosurvival mechanisms, which promote SGEC activation and mirror histologic severity. These findings indicate that autophagy is a central contributor to the pathogenesis of primary SS and a new therapeutic target.
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