Key result
Xirp1 and Xirp2a rapidly mark injured zebrafish muscle but remain nonessential for cardiac morphogenesis.
Why the study?
Little is known about cellular repair mechanisms within myocellular tissue in response to small injuries caused by biomechanical or cellular stress.
Population
Zebrafish model of skeletal muscle injury
Comparison
Laser-induced micro-injury vs uninjured or Xirp-deficient zebrafish
Design
Molecular and cellular analysis using microarray and laser-induced injury
Authors
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May guide myocellular repair studies in zebrafish; leaves open translational relevance to human cardiac disease.
Xirp1 and Xirp2a serve as markers for rapid, cell-proliferation-independent myocellular injury repair in zebrafish, though they are not essential for the repair process or cardiac morphogenesis.
Otten et al. (2012) studied Skeletal muscle injury and cardiac development. Myocellular injury and genetic ablation of Xirp proteins vs. Wild-type or uninjured zebrafish was evaluated on Xirp protein expression and localization upon injury, and developmental viability of mutants. Xirp1 and Xirp2a proteins rapidly localize to injured skeletal muscle in zebrafish, marking wounded cells prior to proliferation, though they are not essential for myocellular repair or cardiac morphogenesis.
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