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Muscle degeneration and leukocyte infiltration caused by mutation of zebrafish fad24

Muscle degeneration and leukocyte infiltration caused by mutation of zebrafish fad24 Factor for adipocyte differentiation 24 (fad24) is a novel gene that has been implicated in adipocyte differentiation and DNA replication. In a screen for zebrafish mutants that have an abnormal tissue distribution of neutrophils, we identified an insertional allele of fad24, fad24hi1019. Homozygous fad24hi1019 larvae exhibit muscle degeneration accompanied by leukocyte infiltration. Muscle degeneration was extensive and included tissue apoptosis and disorganized, poorly striated muscle fibers. Blocking apoptosis using pan‐caspase inhibitors resulted in decreased neutrophil recruitment into the body of the larva, suggesting a causative link between apoptosis and leukocyte infiltration. These findings suggest that zebrafish is a powerful genetic model system to address the interplay between muscle degeneration and leukocyte infiltration, and indicate that tissue apoptosis may contribute to neutrophil recruitment in some inflammatory states. Developmental Dynamics 238:86–99, 2009. © 2008 Wiley‐Liss, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Developmental Dynamics Wiley

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References (68)

Publisher
Wiley
Copyright
Copyright © 2008 Wiley‐Liss, Inc.
ISSN
1058-8388
eISSN
1097-0177
DOI
10.1002/dvdy.21821
pmid
19097072
Publisher site
See Article on Publisher Site

Abstract

Factor for adipocyte differentiation 24 (fad24) is a novel gene that has been implicated in adipocyte differentiation and DNA replication. In a screen for zebrafish mutants that have an abnormal tissue distribution of neutrophils, we identified an insertional allele of fad24, fad24hi1019. Homozygous fad24hi1019 larvae exhibit muscle degeneration accompanied by leukocyte infiltration. Muscle degeneration was extensive and included tissue apoptosis and disorganized, poorly striated muscle fibers. Blocking apoptosis using pan‐caspase inhibitors resulted in decreased neutrophil recruitment into the body of the larva, suggesting a causative link between apoptosis and leukocyte infiltration. These findings suggest that zebrafish is a powerful genetic model system to address the interplay between muscle degeneration and leukocyte infiltration, and indicate that tissue apoptosis may contribute to neutrophil recruitment in some inflammatory states. Developmental Dynamics 238:86–99, 2009. © 2008 Wiley‐Liss, Inc.

Journal

Developmental DynamicsWiley

Published: Jan 1, 2009

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