Starvation resistance in planarians: multiple strategies to get a thrifty phenotype
Gaetana Gambinoa b✉, Paola Iacopettia b, Chiara Ippolitoa c, Alessandra Salvettia b, Leonardo Rossia b
- aDepartment of Clinical and Experimental Medicine University of Pisa Italy
- bDepartment of Clinical and Experimental Medicine, Via Volta 4, 56126 Pisa, Italy
- cDepartment of Clinical and Experimental Medicine, Via Roma 55, 56126 Pisa, Italy
- ✉Corresponding author
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Abstract
Starvation resistance is a life-saving mechanism for many organisms facing food availability fluctuation in the natural environment. Different strategies have been episodically identified for some model organisms, the first of which was the ability to suppress metabolic rate. Among the identified strategies, the ability of planarians to shrink their body under fasting conditions and revert the process after feeding (the growth-degrowth process) represents a fascinating mechanism to face long periods of fasting. The growth-degrowth process is strictly related to the capability of planarians to continuously maintain tissue homeostasis and body proportions even in challenging conditions, thanks to the presence of a population of pluripotent stem cells. Here, we take advantage of several previous studies describing the growth-degrowth process and of recent progress in the understanding of planarian homeostasis mechanisms, to identify tissue-selective transcriptional downregulation as a driving strategy for the development of a thrifty phenotype, and the p53 transcription factor as a player in adjusting tissue homeostasis in accordance with food availability.
TL;DRTissue‐selective transcriptional downregulation as a driving strategy for the development of a thrifty phenotype, and the p53 transcription factor as a player in adjusting tissue homeostasis in accordance with food availability are identified. (Semantic Scholar)