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Histology-based screen for zebrafish mutants with abnormal cell differentiation.

Manzoor-Ali P K Mohideen1, Lee G Beckwith, Gladys S Tsao-Wu

  • 1The Jake Gittlen Cancer Research Institute, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, USA.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|October 28, 2003
PubMed
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Histology identified seven new zebrafish mutations affecting cell differentiation. These mutations cause defects in the retina, gut, and other organs, offering potential models for human diseases.

Area of Science:

  • Developmental biology
  • Genetics
  • Histology

Background:

  • Histology is crucial for understanding cell differentiation.
  • Histologic analysis of tissue sections can reveal cellular abnormalities.

Purpose of the Study:

  • To establish a mutagenesis screen in zebrafish utilizing histology to identify mutations affecting cell differentiation.
  • To characterize novel mutations impacting various organ systems.

Main Methods:

  • A mutagenesis screen was performed on 7-day-old zebrafish larvae.
  • Hematoxylin and eosin-stained tissue sections were analyzed for defects in cell differentiation.
  • Seven noncomplementing, recessive mutations were identified and characterized.

Main Results:

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  • Two mutations affected the retina: segmented photoreceptors (spr) and vestigial outer segments (vos).
  • Three mutations caused gut-specific defects: kirby (kby), stuffy (sfy), and stuffed (sfd).
  • Two mutations impacted multiple organs: disordered neural retina (dnr) and huli hutu (hht), with hht showing abnormalities resembling human neoplasia.

Conclusions:

  • Histologic screening is a feasible method for discovering novel mutations in zebrafish.
  • The identified mutations provide potential models for human diseases.
  • Automation could improve the throughput of histologic screens.