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International Journal of Cell Cloning, Vol 1, 85-91, Copyright © 1983 by AlphaMed Press

ORIGINAL ARTICLES

Improvement of human melanoma colony formation in soft agar using boiled instead of autoclaved agar

SP Thomson, MD Wright and FL Meyskens Jr

The effect of agar sterilized by either boiling or autoclaving on human melanoma colony formation in soft agar was compared using cells from 17 biopsies of metastatic malignant melanoma. The frequency of colony formation was significantly increased for cells grown in boiled agar in 8 samples (47%), unchanged in 8 samples (47%), and decreased in only one sample (6%). There were increases in both cluster and colony formation for the melanomas which had augmented colony formation when grown in boiled agar. There was also qualitative morphological improvement, including rounder, smoother cells and less extracellular debris surrounding the colonies. These data suggest that melanoma colony formation is enhanced when cells are grown in agar which has been sterilized by boiling rather than autoclaving.




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