Evidence map›Paper›PMID 17060454›Full record

ArticleMolecular and cellular biology2007

Conditional deletion of the mouse Klf4 gene results in corneal epithelial fragility, stromal edema, and loss of conjunctival goblet cells.

Shivalingappa K Swamynathan, Jonathan P Katz, Klaus H Kaestner, Ruth Ashery-Padan, Mary A Crawford, Joram Piatigorsky

Open access · greenAbstract read
In one paragraph

Article in Molecular and cellular biology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

88 citing papers in PubMed, 1 synthesis or guideline pooled it, 120 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. MYEOV Is a Novel Marker of Differentiated Corneal Epithelium.Investigative ophthalmology & visual science · 2025
    Article
  4. Review
  5. Eyes open on stem cells.Stem cell reports · 2023
    Review
  6. Review
  7. Molecular function of Krüppel-like factor 7 in biology.Acta biochimica et biophysica Sinica · 2023
    Review
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

28 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Shivalingappa K SwamynathanLaboratory of Molecular and Developmental Biology, National Eye Institute/NIH, 7 Memorial Drive, Room 129, Bethesda, MD 20892, USA. Swamynathans@nei.nih.gov
Jonathan P Katz
Klaus H Kaestner
Ruth Ashery-Padan
Mary A Crawford
Joram Piatigorsky
National Institutes of Health · USUniversity of Pennsylvania · USTel Aviv University · IL

Funding

MOLECULAR BIOLOGY OF THE CORNEAZ01EY000259 · NEI · NATIONAL EYE INSTITUTE · PI PIATIGORSKY, JORAM · 1990 to 2008
$4.3M
Molecular Biology Of The CorneaZIAEY000259 · NEI · NATIONAL EYE INSTITUTE · PI ZELENKA, PEGGY S · 2009 to 2010
$1.7M
Role of KLF4 and KLF5 in mouse cornea developmentK22EY016875 · NEI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI SWAMYNATHAN, SHIVALINGAPPA KOTTUR · 2009 to 2010
$438k
NEI NIH HHS K22 EY016875NEI NIH HHS K22 EY 016875-01
6 · The paper itself

Abstract

The Krüppel-like transcription factor KLF4 is among the most highly expressed transcription factors in the mouse cornea (B. Norman, J. Davis, and J. Piatigorsky, Investig. Ophthalmol. Vis. Sci. 45:429-440, 2004). Here, we deleted the Klf4 gene selectively in the surface ectoderm-derived structures of the eye (cornea, conjunctiva, eyelids, and lens) by mating Klf4-LoxP mice (J. P. Katz, N. Perreault, B. G. Goldstein, C. S. Lee, P. A. Labosky, V. W. Yang, and K. H. Kaestner, Development 129:2619-2628, 2002) with Le-Cre mice (R. Ashery-Padan, T. Marquardt, X. Zhou, and P. Gruss, Genes Dev. 14:2701-2711, 2000). Klf4 conditional null (Klf4CN) embryos developed normally, and the adult mice were viable and fertile. Unlike the wild type, the Klf4CN cornea consisted of three to four epithelial cell layers; swollen, vacuolated basal epithelial and endothelial cells; and edematous stroma. The conjunctiva lacked goblet cells, and the anterior cortical lens was vacuolated in Klf4CN mice. Excessive cell sloughing resulted in fewer epithelial cell layers in spite of increased cell proliferation at the Klf4CN ocular surface. Expression of the keratin-12 and aquaporin-5 genes was downregulated, consistent with the Klf4CN corneal epithelial fragility and stromal edema, respectively. These observations provide new insights into the role of KLF4 in postnatal maturation and maintenance of the ocular surface and suggest that the Klf4CN mouse is a useful model for investigating ocular surface pathologies such as dry eye, Meesmann's dystrophy, and Steven's-Johnson syndrome.

Indexed as

Gene Expression RegulationAnimalsAquaporin 5Cell ProliferationConjunctivaCorneaEdemaEpithelial CellsGene DeletionGene Expression Regulation, DevelopmentalGoblet CellsKeratin-12Kruppel-Like Factor 4Kruppel-Like Transcription FactorsMiceStromal CellsAquaporin 5Keratin-12Klf4 protein, mouseKruppel-Like Factor 4Kruppel-Like Transcription Factors

Identifiers

PMID17060454
PMCPMC1800665
OpenAlexW2146777176

What Socratic holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.