A method for the isolation and culture of human colonic crypts in collagen gels |
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Authors: | Robert H Whitehead Anthony Brown Prithi S Bhathal |
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Institution: | (1) Ludwig Institute for Cancer Besearch, Melbourne Tumor Biology Branch, P. O. Royal Melbourne Hospital, 3050 Victoria, Melbourne, Australia;(2) Department of Anatomical Pathology, Royal Melbourne Hospital, 3050, Melbourne, Australia |
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Abstract: | Summary Little is known concerning the biological factors that control the proliferation of the stem cells of the colonic mucosa.
In part this is due to a lack of systems suitable for studying the proliferation of this mucosa in vitro. We describe a simple
technique for the isolation of single viable intact crypts which are free of stroma and which can then be cultured for periods
of at least 16 d using a collagen gel culture method. This method of crypt isolation was efficient with the mean yield of
viable intact crypts being 1.4 ±1.2×104 (
± SD) crypts/cm2 of mucosa. In culture, mucosal cells only survived for extended periods when the crypts were cultured in collagen gels over
a feeder layer of bovine aortic endothelial cells. Cells containing mucus were present in the cultured crypts at all stages
of the culture; however we have not been able to demonstrate alkaline phosphatase activity in these crypts. Studies of DNA
synthesis after 7 d in culture, using a 18-h pulse label with bromodeoxyuridine (BUdR) has shown that DNA synthesis, as measured
by incorporation of BUdR into nuclei, is still occurring in these cultured crypts. |
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Keywords: | colon mucosa tissue culture |
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