PUBLICATION
Tissue-specific compensatory mechanisms maintain tissue architecture and body size independent of cell size in polyploid zebrafish
- Authors
- Small, C.D., Benfey, T.J., Crawford, B.D.
- ID
- ZDB-PUB-240223-8
- Date
- 2024
- Source
- Developmental Biology 509: 85-96 (Journal)
- Registered Authors
- Crawford, Bryan D.
- Keywords
- Cell size, Morphogenesis, Muscle development, N:C ratio, Patterning, Polyploidy, Tissue architecture, Vascular development, Whole genome duplication, Zebrafish
- MeSH Terms
-
- Animals
- Body Size
- Cell Size
- Ploidies
- Polyploidy*
- Zebrafish*/genetics
- PubMed
- 38387487 Full text @ Dev. Biol.
Citation
Small, C.D., Benfey, T.J., Crawford, B.D. (2024) Tissue-specific compensatory mechanisms maintain tissue architecture and body size independent of cell size in polyploid zebrafish. Developmental Biology. 509:85-96.
Abstract
Genome duplications and ploidy transitions have occurred in nearly every major taxon of eukaryotes, but they are far more common in plants than in animals. Due to the conservation of the nuclear:cytoplasmic volume ratio increased DNA content results in larger cells. In plants, polyploid organisms are larger than diploids as cell number remains relatively constant. Conversely, vertebrate body size does not correlate with cell size and ploidy as vertebrates compensate for increased cell size to maintain tissue architecture and body size. This has historically been explained by a simple reduction in cell number that matches the increase in cell size maintaining body size as ploidy increases, but here we show that the compensatory mechanisms that maintain body size in triploid zebrafish are tissue-specific: A) erythrocytes respond in the classical pattern with a reduced number of larger erythrocytes in circulation, B) muscle, a tissue comprised of polynucleated muscle fibers, compensates by reducing the number of larger nuclei such that myofiber and myotome size in unaffected by ploidy, and C) vascular tissue compensates by thickening blood vessel walls, possibly at the expense of luminal diameter. Understanding the physiological implications of ploidy on tissue function requires a detailed description of the specific mechanisms of morphological compensation occurring in each tissue to understand how ploidy changes affect development and physiology.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping