Defective cellular trafficking of lacrimal gland aquaporin-5 in Sjögren's syndrome

Kazuo Tsubota, Shinichiro Hirai, Landon S. King, Peter Agre, Naruhiro Ishida

Research output: Contribution to journalArticlepeer-review

219 Citations (Scopus)


Dry eyes and dry mouth are clinical hallmarks of Sjögren's syndrome. We assessed the distribution of aquaporin-5 (AQP5) in lacrimal gland biopsy samples. Healthy controls and patients with Mikulicz's disease or non-Sjögren's syndrome dry eye had the expected apical distribution of AQP5 in lacrimal acinar cells. By contrast, cytoplasmic AQP5 was seen in patients with Sjögren's syndrome. Sodium channel and sodium-potassium ATPase distributions were normal in all groups. These findings show a selective defect in lacrimal gland AQP5 trafficking in Sjögren's syndrome that might contribute to decreased lacrimation and dry eye in these patients.

Original languageEnglish
Pages (from-to)688-689
Number of pages2
Issue number9257
Publication statusPublished - 2001 Mar 3
Externally publishedYes

ASJC Scopus subject areas

  • General Medicine


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