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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.
21

The efficacy of astragalus membranaceous tincture at maintaining the circulating leucocyte and absolute neutrophil counts of breast cancer patients undergoing chemotherapeutic treatment

Minnaar, Carrie-Anne 08 April 2010 (has links)
M. Tech. / AIM: To determine the efficacy of Astragalus membranaceous tincture at maintaining the circulating white blood cell count (WBC) and absolute neutrophil count (ANC) of breast cancer patients receiving chemotherapy. METHODS: This is an open-label study with an active control group. Both the study and control group consisted of fifteen participants. The participants in the study group each received ten millilitres of Astragalus membranaceous 1:2 tincture daily for the duration of their course of chemotherapy. RESULTS: The overall decrease in the WBC and ANC in the control was 4.9 and 3.13 parts per billion per litre, respectively. The study group showed an overall decrease of 2.7 and 1.9 parts per billion per litre, respectively. The average overall reduction in chemotherapy dose was 4.79 percent in the study group and 20.21 percent in the control. In all of the analyses p > 0.05. The small sample size, poor patient compliance and skewed distribution of the variables hindered the reliability of the results. CONCLUSION: The positive effects observed in the study group cannot be extrapolated to the entire population, however further research is strongly motivated.
22

Proteome signature of breast cancer cells treated with fucoidan

Janodien, Fatima January 2016 (has links)
>Magister Scientiae - MSc / Breast cancer is responsible for a large portion of cancer-related deaths. Worldwide, incidence is increasing. Routinely-used treatments for breast cancer are invasive and are associated with a range of side-effects which may affect quality of life. Fucoidan, a marine bioactive compound, found primarily in brown seaweed, has various medicinal qualities. Among its bioactivities studied, it has potent anticancer activity. Despite numerous studies, the mechanism of action of fucoidan on cancer cells remains unclear. This project aims to shed light on the mechanism of action of fucoidan by studying its effect on the MCF7 breast cancer cell proteome. The IC50 obtained for fucoidan treated MCF7 cells was 0.2 mg/ml. Decrease in expression of XIAP and phosphorylation of ERK1/2 was observed, indicating a decrease in inhibition of apoptosis and increased sensitivity to apoptosis, respectively. Literature reports activation of several caspases, including caspase-3, in various cell lines after to fucoidan treatment. Taken together, with data from the current study it can be said that fucoidan treatment led to cell death by apoptosis. SILAC analysis identified over 2000 proteins with more than 1700 at 95% confidence. STRING analysis of enriched proteins revealed 19 cell death related proteins. However, SILAC results were ambiguous with regards to differential protein regulation and should be repeated with lower electrospray ionization flow rates, pairwise and single sample runs, and validation with Western blot analysis of various apoptosis related proteins and biochemical assays. / National Research Foundation
23

Effects of AhR activation on the Wnt pathway and CK2 subunits

Boyd, Karla January 2013 (has links)
Although there are hereditary risk factors strongly associated with breast cancer, only a small percentage of breast tumors can be attributed to these. Instead, it is believed that 85-90% of breast cancers are primarily of environmental origin. Polycylic aryl hydrocarbons (PAHs) are environmental carcinogens derived from combustion including fossil fuels. PAHs bind to a cellular aryl hydrocarbon receptor (AhR) that mediates downstream events leading to cellular transformation. Previous work in our laboratory used the prototypical PAH 7,12-dimethylbenz[a]anthracene (DMBA) to form tumors in mouse mammary glands that had constitutive AhR activation, increased Wnt signaling, and strong induction of the CK2 subunit CK2α (Currier, Solomon et al. 2005). Wnt, an important developmental pathway, is implicated in several cancers (Dominguez, Sonenshein et al. 2009). CK2 is a highly promiscuous, constitutively active serine/threonine kinase that is over-expressed in every cancer that has been examined for its presence (Meggio and Pinna 2003). Data from the DMBA-induced mouse tumors demonstrated that these factors may be involved in carcinogen-induced breast cancer, but their role in tumor development is uncertain. The hypothesis underlying this project was that CK2 and the Wnt pathway would be involved in early changes in mouse mammary and liver tissues in animals exposed to DMBA. We used qPCR, Western blotting, and immunohistochemistry to look at changes in Wnt pathway components and known Wnt-dependent genes, and CK2 subunits in mammary and liver tissues one and two weeks after DMBA exposure. Liver tissue was analyzed along with mammary gland tissue because the liver is the site of DMBA metabolism. Our results showed no change in liver or mammary gland morphology at these time points. There was induction of the AhR gene targets cyp1a1 and cyp1b1 in liver tissue but not in mammary gland. Liver also had evidence of Wnt pathway activation. Mammary glands did not have a strong AhR response but did show Wnt induction at two weeks post-exposure, suggesting that DMBA was affecting the liver before the mammary glands. CK2α had an unexpected early decrease in protein expression at one week in liver, which at two weeks resolved to the same levels as control tissue. In mammary glands, CK2α expression levels were the same as control at one week and decreased at two weeks, again suggesting a slower response than liver. Interestingly, CK2β was markedly overexpressed in mammary glands at the two week time-point. These results suggest there is a role for both Wnt and CK2 in early DMBA-generated tissue changes. It is still unclear if these pathways are separately affected by DMBA or if one initiates the other. Further experimentation, possibly in cell culture using inhibitors and siRNA, are called for to better understand these findings.
24

Expression of Id1 in breast cancer

黎紫玲, Lai, Tsz-ling. January 2008 (has links)
published_or_final_version / Medical Sciences / Master / Master of Medical Sciences
25

Granulin expression in basal-like breast cancer

張嘉慧, Cheung, Ka-wai, Eva. January 2008 (has links)
published_or_final_version / Medical Sciences / Master / Master of Medical Sciences
26

The effect of post-operative radiotherapy on local recurrence and survival for women with early stage of node-negative breast cancer: a meta-analysis of randomized controlledtrials

Tsang, Siu-cha, Candy., 曾小查. January 2005 (has links)
published_or_final_version / Medical Sciences / Master / Master of Medical Sciences
27

Breast conservation treatment in Hong Kong: asingle center experience

Yau, Tsz-kok., 游子覺. January 2008 (has links)
published_or_final_version / Medicine / Master / Doctor of Medicine
28

A clinical guideline to minimise radiation-induced dermatitis in womenwith breast cancer

朱慧玲, Chu, Wai-ling. January 2008 (has links)
published_or_final_version / Nursing Studies / Master / Master of Nursing
29

Study of kinesin family member 7 (KIF7) in breast cancer

唐裕婷, Tong, Yu-ting, Tracy. January 2009 (has links)
published_or_final_version / Pathology / Master / Master of Medical Sciences
30

Evidence-based exercise program for breast cancer patients to improve shoulder mobility and prevent exacerbation of lymphedema

陳傲霜, Chan, Ngo-sheung, Dorothy. January 2009 (has links)
published_or_final_version / Nursing Studies / Master / Master of Nursing

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