Langdon Crawford

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The W12 cell line was derived from a low grade cervical lesion, and is unique among HPV16-containing cell lines in carrying its HPV16 genome as a multicopy episome. As such it is thought to be more representative of a premalignant HPV16-induced tumor than the cervical cancers from which other cell lines have been derived. Using the polymerase chain reaction(More)
The human papillomaviruses (HPV) are associated specifically with epithelial lesions, ranging from benign warts to invasive carcinoma. The virus encodes three late proteins, which are produced only in terminally differentiating keratinocytes, two of which are structural components of the virion. The third, E1-E4, is derived primarily from the E4 open(More)
The isolation and construction of a complete human p53 cDNA and subsequent expression in monkey cells is described. A set of new anti-(human p53) monoclonal antibodies has also been obtained and used to show the expression of the human p53 cDNA in cos-l cells. These antibodies enable the specific detection of human p53, which is synthesised in the presence(More)
We analyzed p53 cDNA and genomic clones from a variety of normal and transformed cells. Sequence analysis of these clones revealed that amino acid residue 72 can be an arginine, proline, or cysteine. This single codon difference results in electrophoretically distinct forms of human p53 seen in normal and transformed cells.
Thirty hybridomas that secrete immunoglobulins against the simian virus 40 tumor antigens were isolated and cloned. Of these, 28 produced antibodies which bound to simian virus 40 large-T, and 2 produced antibodies which bound to the host 53,000-dalton protein. As in previous work, large-T antigen was found to have at least one determinant that it shared(More)
Cosmid and lambda clones containing the human p53 gene were isolated and characterized in detail. The gene is 20 kilobases (kb) long and has 11 exons, the first and second exons being separated by an intron of 10 kb. Restriction fragments upstream of sequences known to be within the first identified exon were tested for promoter activity by cloning them in(More)
p53 mRNA and proteins were examined in a variety of human transformed cells and in normal human foreskin fibroblast cells. Both the steady-state and translatable levels of p53 mRNA were the same in normal and transformed human cells. In vitro synthesized p53, programmed by mRNA from normal and transformed human cells, revealed that there was heterogeneity(More)
Antibodies reacting with the host protein p53 were found in the sera of patients with primary or secondary carcinoma of the breast. Fourteen out of the 155 sera from breast cancer patients tested were positive for anti-p53 antibodies (9%) and no positives were detected among 164 control sera from normal women tested. The locations of the first metastasis in(More)