Comparison of methods for DNA extraction from paraffin-embedded tissues and buccal cells.
Both paraffin-embedded tissue specimens and buccal cells are excellent resources for large-scale molecular epidemiological studies. In order to identify the optimal method for DNA extraction, we compared three methods: (1) modified phenol-chloroform protocol; (2) simple boiling method; and (3) DNA Extraction Mini Kit. For paraffin-embedded tissue specimens, amplification of the beta-globin gene sequence was successful in 30 of 34 (88.2%) by the simple boiling method, 29 of 34 (85.3%) samples using DNA extracted by the phenol-chloroform method, and 18 of 34 (52.9%) by the DNA Mini Kit. For buccal cells, amplification of the beta-globin gene sequence was successful in 16 of 17 (94.1%) DNA samples extracted by the phenol-chloroform method, 2 of 16 (12.5%) by the simple boiling method, and 12 of 16 (75%) by the DNA Mini Kit. Both the simple boiling method and the phenol-chloroform method are better methods for DNA isolation from paraffin-embedded tissue specimens, and the phenol-chloroform method is the best method for DNA extraction from buccal cells.
Department of Epidemiology, UCLA School of Public Health, and Jonsson Comprehensive Cancer Center, 71-225 CHS, 90095-1772, Los Angeles, CA, USA.
Wei
W
Cao
Mia
M
Hashibe
Jian Yu
JY
Rao
Hal
H
Morgenstern
Zuo Feng
ZF
Zhang
D002610:Cheek; D004247:DNA / Q000302:isolation & purification*; D016591:Histocytological Preparation Techniques / Q000379:methods; D006801:Humans; D016612:Paraffin Embedding; D016133:Polymerase Chain Reaction
D004247:DNA