The polymerase chain reaction (PCR) was used for detection of human papillomavirus (HPV) in paraffin-embedded tissue. Tissues stored as paraffin blocks were a potential source of DNA for retrospective clinicogenetic analysis. Sections in 6 ㎛ (three ...
The polymerase chain reaction (PCR) was used for detection of human papillomavirus (HPV) in paraffin-embedded tissue. Tissues stored as paraffin blocks were a potential source of DNA for retrospective clinicogenetic analysis. Sections in 6 ㎛ (three or five) thick cut from paraffin blocks of 29 uterine cervix dysplasia, 34 uterine cervix carcinoma in situ, 42 uterine cervix squamous cell carcinoma and 10 uterine cervix metaplasia samples were deparaffinized and incubated at 37℃ for 48hrs. in the lysis solution. Following organic extraction and alcohol precipitation, and extracted DNAs were identified by gel electrophoresis. These DNAs carried out PCR. After repeated cycles of specific oligonucleotideprimed extension of viral DNA with thermophilic DNA polymerase. the type of HPV present was then determined on the basis of the size of the ethidium-bromide stained band visible after agarose gel electrophoresis : for HPV 6 is 263 bp. for HPV 11 is 144 bp, for HPV 16 is 601 bp. and for HPV 18 is 360 bp.
This study detected HPV DNA in four cases. which broke down to HPV 16 in two case of uterine cervix carcinoma in situ and two case of uterine cervix squamous cell carcinoma, no HPV type in the remainder.
Histologically, HPV types 6, 11 are mainly detected in benign genital warts and lowgrade cervical dysplasias, squamous cell carcinoma frequently contained HPV 16, whereas, HPV 18 was present in adenocarcinoma, adenosquamous cell carcinoma and small cell carcinoma of the cervix.
These results indicate that cervical cancers might be clinically influenced by the differences in sutible of the infecting HPV.