The aim of the work included in this PhD thesis was to explore the diverse application possibility of using NIR fluorescent probes with specific properties to visualize and characterize cancer and... Show moreThe aim of the work included in this PhD thesis was to explore the diverse application possibility of using NIR fluorescent probes with specific properties to visualize and characterize cancer and cell death. In this thesis, we mainly focus on optical imaging and its application, both at microscopic and macroscopic level. Because we believe optical imaging in particular represents a technology that has unique potential to exploit further our knowledge in preclinical research. First, we imaged breast tumors and their metastases using combinations of four NIR fluorescent probes that possess different optical imaging properties. Then, we studied two different NIR fluorescent probes, PSVue and a heat shock protein-90 alkylator (NIR fluorescent conjugate of GSAO), which can be used to non-invasively imaging cell death with different optical modules in a mouse model of traumatic brain injury. Next, we employed the NIR fluorescently tagged GSAO as a biomarker for monitoring breast cancer cell death after chemotherapy. Moreover, we provides a general discussion about the advantages and the challenging that the state-of-art optical imaging is facing and shares some future prospective. This thesis ends with a summary that outlined the major findings of studies described in different chapters and explored the clinical implications. Show less
Colorectal cancer (CRC) is a complicated disease in which both genetic pre-desposition and environmental factors are important. Patients with inflammatory bowel disease (IBD) have an increased risk... Show moreColorectal cancer (CRC) is a complicated disease in which both genetic pre-desposition and environmental factors are important. Patients with inflammatory bowel disease (IBD) have an increased risk of developing CRC, and it is believed that treatment of IBD patients with 5-Aminosalicylic acid (5-ASA) reduces the CRC risk. The general purpose of the studies described in this thesis was to evaluate the effect of 5-ASA on the development of CRC, as well as determining the feasibility of introducing 5-ASA as an adjuvant therapy for CRC patients. Animal research showed that chronic 5-ASA medication has the ability to prevent colitis-associated CRC, confirming results from 5-ASA medication in IBD patients. Although 5-ASA was not able to prevent the development of sporadic CRC, 5-ASA treatment was found to hold a great promise for the treatment of CRC, by exerting CRC growth inhibiting, anti-progression and cell death inducing effects, and should be considered to be implemented in a future treatment strategy to CRC. Besides this, the determination of cell death products in the circulation of CRC patients and within the tumour, holds a great promise for selection of CRC patient treatment and patient folluw-up. Show less