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dc.creatorEchols, Jana Elizabethen_US
dc.date.accessioned2012-06-07T22:40:16Z
dc.date.available2012-06-07T22:40:16Z
dc.date.created1995en_US
dc.date.issued1995
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-1995-THESIS-E24en_US
dc.descriptionDue to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.en_US
dc.descriptionIncludes bibliographical references.en_US
dc.descriptionIssued also on microfiche from Lange Micrographics.en_US
dc.description.abstractIn vitro cell model systems derived from rat granuloma cells were developed for the study of multistep ovarian carcinogenesis. Spontaneously immortalized rat granuloma cells (SIGC) were transfected with either the pSV3neo plasmid which contains the SV40 early region genes (SV-SIGC) or the plasmid containing the Her-21neu oncogene (neu-SIGC). Additionally, SIGC were continuously passaged in culture. The three cell model systems were evaluated according to structural and functional alterations associated with the transformed phenotype. SV-SIGC cells were injected into nude mice and the resulting tumors were expanded into an additional cell line (T-SVSIGC). Utilizing indirect immunofluorescence and monoclonal antibodies, the expression of desmosomes and associated cytokeratins in SV-SIGC was lower when compared to SIGC, but T-SV-SIGC showed the most dramatic decrease compared to SIGC. SIGC subject to low calcium medium showed a dramatic reduction of desmoglein staining at cell-cell borders, as well as, single cell migration in the wound healing assay. Additionally, gap junctional intercellular communication (GJIC) was reduced in a step-wise fashion in the SIGC-> SV-SIGC-> T-SV-SIGC system. SIGC transfected with the neu oncogene were anchorage-independent, as shown by soft agar assay. The cytokeratin pattern density was diminished in the neu-SIGC and also showed decreased desmosome expression when compared to SIGC. GJIC was also significantly reduced in the neu-SIGC when compared to the parental line SIGC. GSH was elevated in neu-SIGC compared to SIGC. Late passage SIGC readily formed clones in soft agar and showed a decrease in desmosomal and cytokeratin associated protein organization. They also exhibited a decrease in the rate of GJIC and an increase in glutathione levels compared to low passage (23) SIGC.en_US
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.rightsThis thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use.en_US
dc.subjectveterinary anatomy.en_US
dc.subjectMajor veterinary anatomy.en_US
dc.titleStructural and functional alterations associated with transformation in rat ovarian cell model systemsen_US
dc.typeThesisen_US
thesis.degree.disciplineveterinary anatomyen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelMastersen_US
dc.type.genrethesis
dc.type.materialtexten_US
dc.format.digitalOriginreformatted digitalen_US


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