Ocular malformations of Xenopus laevis exposed to nickel during embryogenesis

O. Hauptman, D. M. Albert, M. C. Plowman, S. M. Hopfer, F. W. Sunderman

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


The pathogenesis of eye anomalies induced by exposure to Ni2+ (as nickel chloride) during embryogenesis was studied in the frog, Xenopus laevis. Eyes of control and Ni2+-exposed tadpoles were examined without staining using a dissecting microscope, by light microscopy of histological sections, and by electron microscopy. The ocular abnormalities of Ni2+-exposed tadpoles included (a) microphthalmia, (b) hypopigmentation, (c) hernias and cysts of the choroid and retina, and (d) iris coloboma; cataracts were uncommon. The pathogenesis of the ocular lesions appears to involve diffuse or focal dysplasia and loss of the retinal pigment epithelium, with dystrophy of photoreceptor outer segments and protrusion of neuroretina through gaps in the pigment epithelium. This study confirms that Ni2+ is a potent ocular teratogen for Xenopus embryos and points to the retinal pigment epithelium as a primary cellular target for Ni2+-induced embryotoxicity.

Original languageEnglish (US)
Pages (from-to)397-406
Number of pages10
JournalAnnals of Clinical and Laboratory Science
Issue number6
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology
  • Immunology and Allergy
  • Pathology and Forensic Medicine
  • Immunology
  • Molecular Biology
  • Hematology
  • Clinical Biochemistry
  • Medical Laboratory Technology


Dive into the research topics of 'Ocular malformations of Xenopus laevis exposed to nickel during embryogenesis'. Together they form a unique fingerprint.

Cite this