Testing of Innocuousness of Benzalkonium Chloride on the Eye Concerning Possible Growth of Langerhans Cells

Summary

The study analysis the influence of benzalkonium chloride on the density of antigen presenting Langerhans cells. This is achieved in a double blind randomized study using in-vivo confocal microscopy to identify and quantify Langerhans cells of the human cornea in its central and peripheral part. This study design is based on observations with raised Langerhans cell density after the application of benzalkonium chloride containing eye drops in glaucoma patients.

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Publications

• Background De Saint Jean M, Brignole F, Bringuier AF, Bauchet A, Feldmann G, Baudouin C. Effects of benzalkonium chloride on growth and survival of Chang conjunctival cells. Invest Ophthalmol Vis Sci. 1999 Mar;40(3):619-30.
• Background Becquet F, Goldschild M, Moldovan MS, Ettaiche M, Gastaud P, Baudouin C. Histopathological effects of topical ophthalmic preservatives on rat corneoconjunctival surface. Curr Eye Res. 1998 Apr;17(4):419-25. doi: 10.1080/02713689808951223.
• Background Noecker R. Effects of common ophthalmic preservatives on ocular health. Adv Ther. 2001 Sep-Oct;18(5):205-15. doi: 10.1007/BF02853166.
• Background Eckard A, Stave J, Guthoff RF. In vivo investigations of the corneal epithelium with the confocal Rostock Laser Scanning Microscope (RLSM). Cornea. 2006 Feb;25(2):127-31. doi: 10.1097/01.ico.0000170694.90455.f7.
• Background Zhivov A, Stachs O, Kraak R, Stave J, Guthoff RF. In vivo confocal microscopy of the ocular surface. Ocul Surf. 2006 Apr;4(2):81-93. doi: 10.1016/s1542-0124(12)70030-7.
• Background Zhivov A, Stave J, Vollmar B, Guthoff R. In vivo confocal microscopic evaluation of Langerhans cell density and distribution in the normal human corneal epithelium. Graefes Arch Clin Exp Ophthalmol. 2005 Oct;243(10):1056-61. doi: 10.1007/s00417-004-1075-8. Epub 2005 Oct 20.

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