Should I shrink or should I grow: cell size changes in tissue morphogenesis

Area of Science:

• Cell Biology
• Developmental Biology
• Biophysics

Background:

• Cellular behaviors like division and death sculpt tissues.
• Cell size changes are increasingly recognized as critical drivers of tissue morphogenesis.
• Cells alter size through changes in macromolecule content (mass) or occupied space (volume).

Purpose of the Study:

• To review molecular mechanisms cells use to control and alter size.
• To discuss the distinct contributions of cell mass and volume changes to tissue morphogenesis.
• To highlight the emerging role of cell size control in embryonic development.

Main Methods:

• Literature review of molecular mechanisms controlling cell size.
• Analysis of how cell mass and volume changes impact tissue development.
• Synthesis of current understanding of cell size regulation in morphogenesis.

Main Results:

• Cell mass changes are slow, while cell volume changes are rapid, utilizing different molecular pathways.
• Both mass and volume alterations, though distinct, are often linked and contribute significantly to tissue shaping.
• Cell size control mechanisms are fundamental to tissue morphogenesis, particularly in developing embryos.

Conclusions:

• Cell size regulation is a fundamental process in tissue morphogenesis.
• Further research into cell size control signals will advance understanding of developmental mechanisms.
• Investigating cell size control offers insights into cellular and molecular drivers of tissue development.