Perinatal ablation of the mouse lens causes multiple anterior chamber defects

Yan Zhang, Paul A. Overbeek, Venkatesh Govindarajan

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Purpose: The purpose of this study was to reassess the role of the lens as an "embryonic organizer" of ocular tissues. Menthods: We ablated the lens in mice by lens-specific expression of an attenuated version of diphtheria toxin A subunit(Tox176) driven by a modified crystallin promoter. Alterations in the differentiation programs of ocular tissues were examined by hematoxylin and eosin staining, in situ hybridization, and immunohistochemistry. Results: Transgenic mice in the family OVE1757 exhibited severe microphakia. Apoptotic lens fibers were seen by embryonic day 15 (E15) and the lenses were completely ablated by post natal day 8. Multiple defects were seen in the anterior chamber. Corneal endothelial cells did not differentiate properly. The mesenchymal cells that would normally give rise to the endothelial layer were found to express N-cadherin, but they failed to form tight junctions and undergo a mesenchymal-to-epithelial transition. Although early specification of the presumptive ciliary body and iris was detected, subsequent differentiation of the iris was blocked. No dramatic changes were seen in the development of the retina. Conclusions: These results support the hypothesis that an intact lens is essential for proper differentiation of both the corneal endothelium and the iris and that the lens "organizes" the development of tissues in the anterior chamber.

Original languageEnglish
Pages (from-to)2289-2300
Number of pages12
JournalMolecular Vision
Volume13
StatePublished - Dec 18 2007

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Anterior Chamber
Lenses
Iris
Embryonic Organizers
Diphtheria Toxin
Corneal Endothelium
Ciliary Body
Crystallins
Epithelial-Mesenchymal Transition
Tight Junctions
Cadherins
Hematoxylin
Eosine Yellowish-(YS)
Transgenic Mice
In Situ Hybridization
Retina
Endothelial Cells
Immunohistochemistry
Staining and Labeling

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

Perinatal ablation of the mouse lens causes multiple anterior chamber defects. / Zhang, Yan; Overbeek, Paul A.; Govindarajan, Venkatesh.

In: Molecular Vision, Vol. 13, 18.12.2007, p. 2289-2300.

Research output: Contribution to journalArticle

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