Expression of a single pair of desmosomal glycoproteins renders the corneal epithelium unique amongst stratified epithelia

Anthea J. Messent, Melanie J. Blissett, Gillian L. Smith, Alison J. North, Anthony Magee, David Foreman, David R. Garrod, Mike Boulton

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

PURPOSE. To determine desmosomal glycoprotein isoform expression in bovine corneal limbal, and conjunctival epithelium and desmosomal profile and distribution during corneal re-epithelialization. METHODS. Immunofluorescence (IF) for desmosomal components on cryostat sections of fresh epithelia was supported by immunoblot analysis of tissue lysates. Wounded corneas maintained in organ culture were examined by IF at times up to full re- epithelialization (96 hours). RESULTS. Immunofluorescence for desmoplakin confirmed desmosome presence throughout all three epithelia. Plakoglobin was also ubiquitous. Of the desmosomal glycoproteins, desmocollin 2 (Dsc2) and desmoglein 2 (Dsg2) were expressed throughout, but Dsc3 and Dsg3 were confined to the limbus and conjunctiva, and Dsc1 and Dsg1 were absent. Dsc2 and Dsg2 IFs were stronger in superficial layers, but Dsc3 and Dsg3 were stronger basally, fading suprabasally. Glycoprotein expression in cornea and conjunctiva was confirmed by immunoblot analysis. No change in glycoprotein expression occurred during re-epithelialization. CONCLUSIONS. Uniquely among stratified epithelia cornea expresses only a single pair of desmosomal glycoproteins, Dsc2 and Dsg2. Expression of Dsc3 and Dsg3 in limbus and conjunctiva coincides with their association with cell proliferation in other epithelia, but corneal epithelial cells did not express Dsc3 or Dsg3 during re-epithelialization. Absence of Dsc1 and Dsg1 correlates with lack of keratinization in ocular epithelia. These expression patterns may have significance for the specific properties and differentiation patterns of the epithelia. Presence of desmosomes throughout re-epithelialization raises the question of how migrating cells mutually re-position.

Original languageEnglish (US)
Pages (from-to)8-15
Number of pages8
JournalInvestigative Ophthalmology and Visual Science
Volume41
Issue number1
StatePublished - 2000
Externally publishedYes

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Desmoglein 2
Corneal Epithelium
Re-Epithelialization
Glycoproteins
Desmocollins
Epithelium
Conjunctiva
Cornea
Fluorescent Antibody Technique
Desmosomes
Desmoplakins
gamma Catenin
Organ Culture Techniques
Protein Isoforms
Epithelial Cells
Cell Proliferation

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Messent, A. J., Blissett, M. J., Smith, G. L., North, A. J., Magee, A., Foreman, D., ... Boulton, M. (2000). Expression of a single pair of desmosomal glycoproteins renders the corneal epithelium unique amongst stratified epithelia. Investigative Ophthalmology and Visual Science, 41(1), 8-15.

Expression of a single pair of desmosomal glycoproteins renders the corneal epithelium unique amongst stratified epithelia. / Messent, Anthea J.; Blissett, Melanie J.; Smith, Gillian L.; North, Alison J.; Magee, Anthony; Foreman, David; Garrod, David R.; Boulton, Mike.

In: Investigative Ophthalmology and Visual Science, Vol. 41, No. 1, 2000, p. 8-15.

Research output: Contribution to journalArticle

Messent, AJ, Blissett, MJ, Smith, GL, North, AJ, Magee, A, Foreman, D, Garrod, DR & Boulton, M 2000, 'Expression of a single pair of desmosomal glycoproteins renders the corneal epithelium unique amongst stratified epithelia', Investigative Ophthalmology and Visual Science, vol. 41, no. 1, pp. 8-15.
Messent, Anthea J. ; Blissett, Melanie J. ; Smith, Gillian L. ; North, Alison J. ; Magee, Anthony ; Foreman, David ; Garrod, David R. ; Boulton, Mike. / Expression of a single pair of desmosomal glycoproteins renders the corneal epithelium unique amongst stratified epithelia. In: Investigative Ophthalmology and Visual Science. 2000 ; Vol. 41, No. 1. pp. 8-15.
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abstract = "PURPOSE. To determine desmosomal glycoprotein isoform expression in bovine corneal limbal, and conjunctival epithelium and desmosomal profile and distribution during corneal re-epithelialization. METHODS. Immunofluorescence (IF) for desmosomal components on cryostat sections of fresh epithelia was supported by immunoblot analysis of tissue lysates. Wounded corneas maintained in organ culture were examined by IF at times up to full re- epithelialization (96 hours). RESULTS. Immunofluorescence for desmoplakin confirmed desmosome presence throughout all three epithelia. Plakoglobin was also ubiquitous. Of the desmosomal glycoproteins, desmocollin 2 (Dsc2) and desmoglein 2 (Dsg2) were expressed throughout, but Dsc3 and Dsg3 were confined to the limbus and conjunctiva, and Dsc1 and Dsg1 were absent. Dsc2 and Dsg2 IFs were stronger in superficial layers, but Dsc3 and Dsg3 were stronger basally, fading suprabasally. Glycoprotein expression in cornea and conjunctiva was confirmed by immunoblot analysis. No change in glycoprotein expression occurred during re-epithelialization. CONCLUSIONS. Uniquely among stratified epithelia cornea expresses only a single pair of desmosomal glycoproteins, Dsc2 and Dsg2. Expression of Dsc3 and Dsg3 in limbus and conjunctiva coincides with their association with cell proliferation in other epithelia, but corneal epithelial cells did not express Dsc3 or Dsg3 during re-epithelialization. Absence of Dsc1 and Dsg1 correlates with lack of keratinization in ocular epithelia. These expression patterns may have significance for the specific properties and differentiation patterns of the epithelia. Presence of desmosomes throughout re-epithelialization raises the question of how migrating cells mutually re-position.",
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AU - North, Alison J.

AU - Magee, Anthony

AU - Foreman, David

AU - Garrod, David R.

AU - Boulton, Mike

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N2 - PURPOSE. To determine desmosomal glycoprotein isoform expression in bovine corneal limbal, and conjunctival epithelium and desmosomal profile and distribution during corneal re-epithelialization. METHODS. Immunofluorescence (IF) for desmosomal components on cryostat sections of fresh epithelia was supported by immunoblot analysis of tissue lysates. Wounded corneas maintained in organ culture were examined by IF at times up to full re- epithelialization (96 hours). RESULTS. Immunofluorescence for desmoplakin confirmed desmosome presence throughout all three epithelia. Plakoglobin was also ubiquitous. Of the desmosomal glycoproteins, desmocollin 2 (Dsc2) and desmoglein 2 (Dsg2) were expressed throughout, but Dsc3 and Dsg3 were confined to the limbus and conjunctiva, and Dsc1 and Dsg1 were absent. Dsc2 and Dsg2 IFs were stronger in superficial layers, but Dsc3 and Dsg3 were stronger basally, fading suprabasally. Glycoprotein expression in cornea and conjunctiva was confirmed by immunoblot analysis. No change in glycoprotein expression occurred during re-epithelialization. CONCLUSIONS. Uniquely among stratified epithelia cornea expresses only a single pair of desmosomal glycoproteins, Dsc2 and Dsg2. Expression of Dsc3 and Dsg3 in limbus and conjunctiva coincides with their association with cell proliferation in other epithelia, but corneal epithelial cells did not express Dsc3 or Dsg3 during re-epithelialization. Absence of Dsc1 and Dsg1 correlates with lack of keratinization in ocular epithelia. These expression patterns may have significance for the specific properties and differentiation patterns of the epithelia. Presence of desmosomes throughout re-epithelialization raises the question of how migrating cells mutually re-position.

AB - PURPOSE. To determine desmosomal glycoprotein isoform expression in bovine corneal limbal, and conjunctival epithelium and desmosomal profile and distribution during corneal re-epithelialization. METHODS. Immunofluorescence (IF) for desmosomal components on cryostat sections of fresh epithelia was supported by immunoblot analysis of tissue lysates. Wounded corneas maintained in organ culture were examined by IF at times up to full re- epithelialization (96 hours). RESULTS. Immunofluorescence for desmoplakin confirmed desmosome presence throughout all three epithelia. Plakoglobin was also ubiquitous. Of the desmosomal glycoproteins, desmocollin 2 (Dsc2) and desmoglein 2 (Dsg2) were expressed throughout, but Dsc3 and Dsg3 were confined to the limbus and conjunctiva, and Dsc1 and Dsg1 were absent. Dsc2 and Dsg2 IFs were stronger in superficial layers, but Dsc3 and Dsg3 were stronger basally, fading suprabasally. Glycoprotein expression in cornea and conjunctiva was confirmed by immunoblot analysis. No change in glycoprotein expression occurred during re-epithelialization. CONCLUSIONS. Uniquely among stratified epithelia cornea expresses only a single pair of desmosomal glycoproteins, Dsc2 and Dsg2. Expression of Dsc3 and Dsg3 in limbus and conjunctiva coincides with their association with cell proliferation in other epithelia, but corneal epithelial cells did not express Dsc3 or Dsg3 during re-epithelialization. Absence of Dsc1 and Dsg1 correlates with lack of keratinization in ocular epithelia. These expression patterns may have significance for the specific properties and differentiation patterns of the epithelia. Presence of desmosomes throughout re-epithelialization raises the question of how migrating cells mutually re-position.

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