Proteome profiling of wild type and lumican-deficient mouse corneas

Han Juan Shao, Raghothama Chaerkady, Shoujun Chen, Sneha M. Pinto, Rakesh Sharma, Bernard Delanghe, David E. Birk, Akhilesh Pandey, Shukti Chakravarti

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


To elucidate how the deficiency of a major corneal proteoglycan, lumican, affects corneal homeostasis, we used mass spectrometry to derive the proteome profile of the lumican-deficient and the heterozygous mouse corneas and compared these to the wild type corneal proteome. 2108 proteins were quantified in the mouse cornea. Selected proteins and transcripts were investigated by Western blot and quantitative RT-PCR, respectively. We observed major changes in the composition of the stromal extracellular matrix (ECM) proteins in the lumican-deficient mice. Lumican deficiency altered cellular proteins in the stroma and the corneal epithelium. The ECM changes included increases in fibril forming collagen type I, Collagen type VI, fibromodulin, perlecan, laminin β 2, collagen type IV, nidogen/entactin and anchoring collagen type VII in the Lum +/- and the Lum -/- mouse corneas, while the stromal proteoglycans decorin, biglycan and keratocan were decreased in the Lum -/- corneas. Cellular protein changes included increases in alcohol dehydrogenase, superoxide dismutase and decreases in epithelial cytokeratins 8 and 14. We also detected proteins that are novel to the cornea. The proteomes will provide an insight into the lumican-deficient corneal phenotype of stromal thinning and loss of transparency and a better understanding of pathogenic changes in corneal and ocular dystrophies.

Original languageEnglish (US)
Pages (from-to)1895-1905
Number of pages11
JournalJournal of Proteomics
Issue number10
StatePublished - Sep 6 2011


  • Collagen
  • Cornea
  • Lumican
  • Mass spectrometry
  • Proteomics

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry


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