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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Anti-tumor activity of an oncolytic adenoviral construct expressing a small interfering RNA transgene

Samuel, Shirley Kulangara. Tong, Alex W. January 2007 (has links)
Thesis (Ph.D.)--Baylor University, 2007. / In the abstract "(5 @ 1x108 pfu)" the "8" and "ONYX-411-siRNAGFP" the "GFP" are superscripts. Includes bibliographical references (p. 71-81).
12

Ras signalling pathway and MLL-rearranged leukaemias /

Ng, Ming-him. January 2006 (has links)
Thesis (M. Phil.)--University of Hong Kong, 200. / Also available online.
13

Ras signalling pathway and MLL-rearranged leukaemias

Ng, Ming-him., 吳明謙. January 2006 (has links)
published_or_final_version / abstract / Pathology / Master / Master of Philosophy
14

Enrichment of AU-rich element containing mRNAs during intestinal cell epithelial-mesenchymal transition roles, mechanisms, and significance /

Kanies, Cindy Lynn. January 2008 (has links)
Thesis (Ph. D. in Cancer Biology)--Vanderbilt University, May 2008. / Title from title screen. Includes bibliographical references.
15

NRAS and BRAF mutations in primary cutaneous melanoma : a comparison of mutation rates between radial and vertical growth phases in individual tumors.

Greene, Victoria R. Ellerhorst, Julie. Piller, Linda Beth. Diamond, Pamela M. January 2007 (has links)
Thesis (M.P.H.)--University of Texas Health Science Center at Houston, School of Public Health, 2007. / Source: Masters Abstracts International, Volume: 46-01, page: 0342. Adviser: Julie Ellerhorst. Includes bibliographical references.
16

NEUROFIBROMIN, NERVE GROWTH FACTOR AND RAS: THEIR ROLES IN CONTROLLING THE EXCITABILITY OF MOUSE SENSORY NEURONS

Wang, Yue 03 January 2007 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / ABSTRACT Yue Wang Neurofibromin, nerve growth factor and Ras: their roles in controlling the excitability of mouse sensory neurons Neurofibromin, the product of the Nf1 gene, is a guanosine triphosphatase activating protein (GAP) for p21ras (Ras) that accelerates the conversion of active Ras-GTP to inactive Ras-GDP. It is likely that sensory neurons with reduced levels of neurofibromin have augmented Ras-GTP activity. In a mouse model with a heterozygous mutation of the Nf1 gene (Nf1+/-), the patch-clamp recording technique is used to investigate the role of neurofibromin in controlling the state of neuronal excitability. Sensory neurons isolated from adult Nf1+/- mice generate more APs in response to a ramp of depolarizing current compared to Nf1+/+ mice. In order to elucidate whether the activation of Ras underlies this augmented excitability, sensory neurons are exposed to nerve growth factor (NGF) that activates Ras. In Nf1+/+ neurons, exposure to NGF increases the production of APs. To examine whether activation of Ras contributes to the NGF-induced sensitization in Nf1+/+ neurons, an antibody that neutralizes Ras activity is internally perfused into neurons. The NGF-mediated augmentation of excitability is suppressed by the Ras-blocking antibody in Nf1+/+ neurons, suggesting the NGF-induced sensitization in Nf1+/+ neurons depends on the activation of Ras. Surprisingly, the excitability of Nf1+/- neurons is not altered by the blocking antibody, suggesting that this enhanced excitability may depend on previous activation of downstream effectors of Ras. To determine the mechanism giving rise to augmented excitability of Nf1+/- neurons, isolated membrane currents are examined. Consistent with the enhanced excitability of Nf1+/- neurons, the peak current density of tetrodotoxin-resistant (TTX-R) and TTX-sensitive (TTX-S) sodium currents (INa) are significantly larger than in Nf1+/+ neurons. Although the voltage for half-maximal activation (V0.5) is not different, there is a significant depolarizing shift in the V0.5 for steady-state inactivation of INa in Nf1+/- neurons. In summary, these results demonstrate that the enhanced production of APs in Nf1+/- neurons results from a larger current amplitude and a depolarized voltage dependence of steady-state inactivation of INa that leads to more sodium channels being available for the subsequent firing of APs. My investigation supports the idea that regulation of channels by the Ras cascade is an important determinant of neuronal excitability. Grant D. Nicol, Ph.D, Chair

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