期刊
AUTOPHAGY
卷 18, 期 7, 页码 1629-1647出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15548627.2021.1995150
关键词
Apoptosis; autophagy; lysosomal membrane permeabilization; lysosome-associated membrane protein 3; salivary gland; Sjogren syndrome
类别
资金
- Division of Intramural Research, NIDCR/NIH
- JSPS Research Fellowship for Japanese Biomedical and Behavioral Researchers at NIH
In patients with SS (Sjogren's syndrome), increased expression of LAMP3 has been associated with increased apoptosis and accumulation of autoantigens. Studies showed that LAMP3 expression led to lysosomal membrane permeabilization, affecting autophagic flux and caspase activation. This highlights the significant role of LAMP3 expression in the pathogenesis of SS.
Sjogren syndrome (SS) is a chronic and progressive autoimmune disease characterized by dry mouth and dry eyes, and characteristic autoantibodies. Evidence of altered macroautophagy/autophagy and apoptosis has been associated with SS, but a mechanistic understanding of the gene expression changes associated with these abnormal processes has not been realized. Recently, increased LAMP3 (lysosomal associated membrane protein 3) expression was found in a subset of SS patients and was associated with increased apoptosis and autoantigen accumulation and release. To better understand how LAMP3 expression might modulate apoptosis, cell biology, and biochemical studies were used to examine the effect of LAMP3 expression in minor salivary gland cells. LAMP3 expression resulted in degradation of LAMP1 increasing lysosomal membrane permeabilization and relocalization of cathepsins to the cytoplasm, resulting in destabilizing autophagic flux and caspase activation. These findings highlight the central role of LAMP3 expression in the pathogenesis of SS.
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