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JMD 2001, Vol. 3, No. 1
Copyright © 2001 American Society for Investigative Pathology & Association for Molecular Pathology

Quantitative Amplification of Genomic DNA from Histological Tissue Sections after Staining with Nuclear Dyes and Laser Capture Microdissection

From the Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri

Laser capture microdissection (LCM) allows the selective sampling of tissue from histological sections. A prerequisite for this technique is the availability of histological dyes that do not interfere with downstream analysis of the sampled genetic material. We have examined the effect of four histological nuclear dyes (methyl green, hematoxylin, toluidine blue O, azure B) on TaqMan polymerase chain reaction amplification of ß-actin genomic DNA prepared from fixed and frozen tissue. Tissue sampled from the histological sections by manual dissection was compared with tissue sampled by LCM. As previously reported, when manually dissected tissue sections were analyzed, polymerase chain reaction amplification of DNA after hematoxylin staining was inferior to that after staining with the other dyes. In contrast, when tissue sampled by LCM was examined, DNA recovery after hematoxylin staining was equivalent to the recovery after methyl green staining. We conclude that DNA recovery from LCM-sampled tissue is independent of the histological stain chosen to highlight nuclear detail.

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