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Title: Planarian Cell Number Depends on blitzschnell, a Novel Gene Family That Balances Cell Proliferation and Cell Death
Author: Pascual Carreras, Eudald
Marin Barba, Marta
Herrera Úbeda, Carlos
Font Martín, Daniel
Eckelt, Kay
Sousa, Nidia De
Garcia Fernández, Jordi
Saló i Boix, Emili
Adell i Creixell, Teresa
Keywords: Proliferació cel·lular
Mort cel·lular
Regeneració (Biologia)
Cell proliferation
Cell death
Regeneration (Biology)
Issue Date: 8-Apr-2020
Publisher: The Company of Biologists
Abstract: Control of cell number is crucial to define body size during animal development and to restrict tumoral transformation. The cell number is determined by the balance between cell proliferation and cell death. Although many genes are known to regulate those processes, the molecular mechanisms underlying the relationship between cell number and body size remain poorly understood. This relationship can be better understood by studying planarians, flatworms that continuously change their body size according to nutrient availability. We identified a novel gene family, blitzschnell (bls), that consists of de novo and taxonomically restricted genes that control cell proliferation:cell death ratio. Their silencing promotes faster regeneration and increases cell number during homeostasis. Importantly, this increase in cell number leads to an increase in body size only in a nutrient-rich environment; in starved planarians, silencing results in a decrease in cell size and cell accumulation that ultimately produces overgrowths. bls expression is downregulated after feeding and is related to activity of the insulin/Akt/mTOR network, suggesting that the bls family evolved in planarians as an additional mechanism for restricting cell number in nutrient-fluctuating environments.
Note: Reproducció del document publicat a:
It is part of: Development, 2020, vol. 147, num. 7, p. 184044
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ISSN: 0950-1991
Appears in Collections:Articles publicats en revistes (Institut de Biomedicina (IBUB))
Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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