Journal
TRAFFIC
Volume 20, Issue 1, Pages 27-38Publisher
WILEY
DOI: 10.1111/tra.12617
Keywords
autophagy; lysosome; metabolic signaling; mTORC1
Categories
Funding
- Diabetes Research Center, University of Washington [2 P30 DK020579]
- NIH [AG050135, AG051974, AG056771 CA215249]
- U.S. Department of Veterans Affairs [I01-BX004031]
- Damon Runyon Cancer Research Foundation [DRG-2178-14]
- American Federation for Aging Research
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For the past five decades, the lysosome has been characterized as an unglamorous cellular recycling center. This notion has undergone a radical shift in the last 10 years, with new research revealing that this organelle serves as a major hub for metabolic signaling pathways. The discovery that master growth regulators, including the protein kinase mTOR (mechanistic target of rapamycin), make their home at the lysosomal surface has generated intense interest in the lysosome's key role in nutrient sensing and cellular homeostasis. The transcriptional networks required for lysosomal maintenance and function are just being unraveled and their connection to lysosome-based signaling pathways revealed. The catabolic and anabolic pathways that converge on the lysosome connect this organelle with multiple facets of cellular function; when these pathways are deregulated they underlie multiple human diseases, and promote cellular and organismal aging. Thus, understanding how lysosome-based signaling pathways function will not only illuminate the fascinating biology of this organelle but will also be critical in unlocking its therapeutic potentials.
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