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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.

Identification of novel pyruvate dehydrogenase kinase 1 (PDK1) inhibitors for anticancer therapeutics

Zhang, Wen January 2018 (has links)
University of Macau / Faculty of Health Sciences

Anti-cancer synergy of targeting pyruvate dehydrogenase kinase 1 (PDK1) in combination with EGFR-TKi in NSCLC therapy

Yang, Zheng January 2018 (has links)
University of Macau / Faculty of Health Sciences

The synthesis and breast cancer inhibitory activity of cinnamic acid analogues based on the halogenated monoterpene pharmacophore

Chiwakata, Maynard Tendai January 2012 (has links)
Breast cancer is one of the leading causes of death, with mortality rate estimates of 465 000 deaths per annum. It is estimated that 1.3 million women are diagnosed with the disease each year especially in the developing countries. Current chemotherapy relies on the use of high doses of non-specific toxic agents that possess adverse side effects and compromise patient’s compliance and adherence to treatment. Paclitaxel, one of the common drugs used in breast cancer chemotherapy results in sensory and motor neuropathy, whilst hormonal therapy e.g. Herceptin causes severe cardiovascular, gastrointestinal and cutaneous side effects. There has been a demand in developing newer cancer agents that demonstrate selective cytoxicity with minimal effect on normal body tissue. Numerous studies have shown that marine organisms produce a wide range of halogenated compounds that possess cytotoxic properties, and hence can be a source of new drug hits or leads for cancer therapy. Halomon, a polyhalogenated monoterpene from Portieria hornemannii, displayed interesting activity against brain, renal and lung cancer tumours with selective/differential cytotoxicity. This inspired us to focus our project on halogenated monoterpenes isolated from the same Rhodophyta class as P. hornemannii but with particular attention to Plocamium species. Several metabolites have been isolated from P. cornutum, P. corallorhiza and P. suhrii that possess interesting cytotoxicities against a breast cancer cell line (MCF7) and an oesophageal cancer line (WHCO1). The aim of the project was therefore centred at isolating target compounds for preliminary structure-activity studies against a breast cancer cell line, and use this information to synthesize a series of analogues that are more stable than the natural products and yet as active using a fragment-based type approach to map out pharmacophoric elements. Five metabolites were isolated from P. cornutum and five from P. corallorhiza. Cell-based assays were conducted using an MTT assay kit against MCF7 and MDA-MB-231 breast cancer cell lines and (1E,3E,5S,6R)-1,5,6-trichloro-2-(dichloromethyl)-6-methylocta-1,3,7-triene, isolated from P. cornutum was the most active with IC50 values of 3.0 μM and 6.15 μM respectively. Introduction of a terminal aromatic ring to enhance stability, together with varying substituents (H, CH3, CF3, Br, CN, CHO, CHCl2) on position 7 of the molecule, gave rise to a series of cinnamate ester derivatives inspired by (1E,3E,5S,6R)-1,5,6-trichloro-2-(dichloromethyl)-6-methylocta-1,3,7-triene. The analogues were synthesized from their benzaldehyde precursors via Aldol condensation, esterification and Wittig reactions. Their carboxylic acid counterparts were synthesized by hydrolysis of the parent esters in an attempt to promote water solubilities of the analogues. Biological activity assays were then conducted with the cinnamate analogues against the MDA-MB-231 breast cancer cell line using an MTT assay kit. Ester derivatives with -CHO and -CHCl2 functionalities had IC50 values of 43.45 μM and 100.01 μM respectively whilst the other ester derivatives were inactive. It was concluded that either an aldehyde (-CHO) or gem-dichlorides (-CHCl2) is specifically required for cytotoxic activity to be observed. None of the carboxylic acids were active which could have been due to failure of the compounds to enter the breast cancer cells and reach the target site because of their polar nature. Compounds with -CHO and -CHCl2 functionalities were therefore selected for future SARs studies.

Perceptions about cancer treatment : a Bloemfontein perspective

Masalla, S.G., De Waal, K., Friedrich-Nel, H.S. January 2010 (has links)
Published Article / Cancer patients have varying perceptions about their treatment. The aim of the study was to investigate the different perceptions that patients have about their treatment, and how these perceptions are influenced by their social and cultural backgrounds. The impact of these perceptions on patient responses was also investigated. Eighty-five patients were selected for the study and interviewed using a questionnaire to explore their perceptions and the possible impact of these perceptions on their responses to treatment. An analysis of the perceptions is provided.

The pathogenesis and management of malignancy-associated hypercalcaemia

Ralston, Stuart H. January 1987 (has links)
No description available.

Advances in treatment for nasopharyngeal carcinoma

Kwong, Lai-wan, Dora., 鄺麗雲. January 2006 (has links)
published_or_final_version / abstract / Medicine / Master / Doctor of Medicine

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

Stereotactic radiosurgery as salvage treatment for locally recurrent nasopharyngeal carcinoma

Chua, T. T., Daniel., 蔡清淟. January 2006 (has links)
published_or_final_version / abstract / Medicine / Master / Doctor of Medicine

Non-small cell lung cancer clinical trials on new medicines

譚郭雅欣, Tam, Gloria. January 2008 (has links)
published_or_final_version / Community Medicine / Master / Master of Public Health

Management strategies for advanced stage of esophageal cancer

Tong, King-hung, Daniel., 唐琼雄. January 2009 (has links)
published_or_final_version / Surgery / Master / Master of Surgery

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