Human Reproduction, Vol 13, 161-164, Copyright © 1998 by Oxford University Press
D De Neubourg, A Robins, S Fishel and L Delbeke
The presence of insulin-like growth factor I (IGF-I) receptors on granulosa
cells was investigated by flow cytometric analysis. Granulosa cells were
retrieved from follicular fluid after oocyte retrieval during assisted
reproduction technology procedures. Whole samples of follicular fluid were
pooled and the cellular fraction analysed. In order to analyse granulosa
cells only we developed a dual labelling technique whereby granulosa cells
were identified as CD45 negative cells, distinguishing them from leukocytes
which are CD45 positive. Analysis of the IGF-I receptor was done by
staining the sample with a monoclonal anti-IGF-I receptor antibody
(alphaIR3 clone) and goat anti- mouse phycoerythrin labelled antibody.
After identification of the presence of IGF-I receptors, receptor
expression was quantified by calibration of the fluorescence signals. We
analysed 10 patients' samples and showed 559-1774 binding sites per
granulosa cell with a mean value of 1125 +/- 382 (SD).
ARTICLES
Quantification of insulin-like growth factor I receptors on granulosa cells with flow cytometry after follicular stimulation
NURTURE, Department of Obstetrics and Gynaecology, University of Nottingham, Queen's Medical Centre, UK.
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