Stacey Simpson

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The pathogenesis of cervical human papillomavirus (HPV) infection is influenced by the host's immune response. This response depends upon secretion of specific lymphokines to recruit and activate immune cells at the site of infection. To examine whether cervical cells enhance immune-responsiveness, secretion of lymphokines by cultures of normal cervical(More)
To develop a physical map, one often uses a large-insert library to establish a contiguous set of overlapping genomic clones (‘contig’). One of the most efficient ways to prepare contigs in limited chromosomal regions is chromosome-walking. For this approach, it is important to retrieve DNA sequences from the termini of the insert fragment to screen for(More)
In the absence of antibiotics, carriage of pACYC184 reduces the competitive fitness of an Escherichia coli B genotype that was not previously selected for plasmid carriage, relative to that of an isogenic plasmid-free competitor. However, a host genotype propagated with the plasmid for 500 generations evolved an unexpected competitive advantage from plasmid(More)
Cervical cancer is a malignancy closely associated with human papillomavirus (HPV). However, some cervical carcinomas occur in the absence of the virus. Two HPV-negative cervical carcinoma cell lines, C-33A and HT-3, were examined by G-banding and fluorescence in situ hybridization (FISH) using several whole chromosome and satellite probes. Combined(More)
Ultrastructural studies of cereal anthers found intranuclear bundles of microfilaments in pollen mother cells (PMCs) but not elsewhere. The ultrastructure, distribution, and behaviour of this fibrillar material (FM) are described. FM was seen in all 19 genotypes studied comprising Aegilops, Triticum, Secale, Hordeum and Avena species, which together(More)
Binding of Wheat Germ Agglutinin (WGA) to cell suspensions derived from in vivo grown solid rat tumors of independent origin and of different metastatic potential has been examined, and results compared with previous work in other systems. The assay used to assess binding was based on the reaction of iodine 125-labelled lectin to tumor cells in suspension(More)
The human papillomavirus (HPV) transforming genes E6 and E7 are retained and expressed in the majority of cervical cancers implying an important role for these proteins in maintenance of the malignant phenotype. Leukoregulin (LR) and recombinant gamma-interferon (r-IFN-gamma), lymphokines secreted by immune cells present in regressing HPV infections,(More)
Viral chimeras have been constructed through in vitro manipulations of the infectious cDNA clones of two prototypes of Theiler's murine encephalomyelitis virus: (i) the virulent GDVII strain and (ii) the less virulent BeAn and VL strains. Previous studies have suggested that the phenotypic differences in virulence between the BeAn and GDVII strains map to(More)
Human Papillomavirus (HPV) type 16 is the most frequently detected HPV in cervical cancer. Although epidemiologic and experimental evidence indicates a prominent role for HPV infection in the development of this disease, other factors are also involved. Altered expression of the ets family transcription factors erg and ets-2 was found associated with the(More)
To examine whether the tumor suppressor gene p53 influences epidermal differentiation, primary cultures of human foreskin keratinocytes and six human papillomavirus (HPV)-positive cell lines were infected with recombinant retroviruses encoding wild-type p53. Overexpression of p53 in organotypic cultures of normal keratinocytes decreased their growth rate(More)