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The endolymphatic sac, a potential endocrine gland?
K Qvortrup1, J Rostgaard, N H Holstein-Rathlou
1Department of Medical Anatomy, University of Copenhagen, The Panum Institute, Denmark. K.Qvortrup@mai.ku.dk
Acta Oto-Laryngologica
|May 13, 1999
Abstract:
A previous investigation indicated that the chief cells of the endolymphatic sac produce an endogenous inhibitor of sodium re-absorption in the kidneys, which has tentatively been named "saccin". In this study, the ultrastructure of the endolymphatic sac and in particular the chief cells is described, demonstrating that this organ fulfils the morphological criteria of a potential endocrine gland. Accordingly, the chief cells are shown to exhibit all the organelles and characteristics of cells that simultaneously synthesize, secrete, absorb and digest proteins.