Human Reproduction, Vol. 15, No. 3, 584-588,
March 2000
© 2000 European Society of Human Reproduction and Embryology
Fluorescence diagnosis of endometriosis on the chorioallantoic membrane using 5-aminolaevulinic acid
1 Department of Obstetrics and Gynaecology, Medical University Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, 2 Department of Obstetrics and Gynaecology, Medical University Ulm and 3 Institut für Lasertechnologien in der Medizin und Messtechnik, Ulm, Germany
The chorioallantoic membrane (CAM) is a useful model for the fluorescence diagnosis of experimentally induced endometriosis. In our experimental setup 75.7% of the histologically examined tissue preparations were viable and only 24.3% showed signs of necrosis on the CAM after various periods of incubation. Best results were obtained when grafting to the CAM was performed between days 7 and 9 and when implants were left on the CAM for 35 days (P < 0.05). We were able to demonstrate that 5-aminolaevulinic acid (ALA) is stored selectively in ectopic endometrium. The subsequent fluorescence of the endometrium shows a rapid increase that reaches a peak after 1014 h which can be clearly differentiated from the weaker fluorescence of grafted normal peritoneum and fimbriae (P < 0.01).
Key words: 5-aminolaevulinic acid/chorioallantoic membrane/endometriosis/fluorescence diagnosis/photodynamic diagnosis
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