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Title: The role of innate immune responses in oncolytic adenovirus therapy in ovarian cancer
Author: Leung, Elaine Yee Ling
ISNI:       0000 0004 7224 0441
Awarding Body: University of Glasgow
Current Institution: University of Glasgow
Date of Award: 2018
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Epithelial ovarian cancer is the deadliest gynaecological cancer: most women die within five years of their diagnoses. Moreover, survival of women with ovarian cancer (OC) has not significantly improved in the past decade. Oncolytic viruses (OVs), a new class of anti-cancer agent, infect and replicate selectively within malignant cells, whilst sparing normal cells. OVs also induce profound immune responses, for example disruption of chemokine and cytokine networks, with potential influence on therapeutic effectiveness. On the other hand, Natural Killer cells (NK cells), a key immune population that surveillance against cancers and viruses, may hinder the spread of OVs or promote anti-tumoural effects of OVs. This work investigated the role of innate immune responses, in particular NK cells and interleukin (IL)-17F, on the efficacy of oncolytic adenovirus in OC. I demonstrated that NK cells were activated by adenovirus-infected OC cells. Activated NK cells then augmented oncolytic adenovirus in eliminating OC via contact-dependent interactions between activating NK receptor DNAM-1 and adenovirus-infected malignant cells. In addition, consistent changes in chemokines and cytokines were observed after wild-type and oncolytic adenovirus infection. In particular, IL-17F, but not IL-17A, was significantly upregulated in different established and primary OC lines after adenovirus infections. Moreover, a range of inflammatory chemokines, including CCL2, CXCL1, CXCL2 and CXCL5, were down-regulated after oncolytic adenovirus infection. This work also revealed the logistical and technical challenges of the use of primary patient materials. I identified that our primary culture method for expanding OC cells was suboptimal. I subsequently evaluated a simple immunohistochemical method to screen for successful primary expansion of malignant cells from OC ascites. I showed that PAX8, but not CK7, was a specific marker of successful ex vivo expansion of HGSOC.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
Keywords: RG Gynecology and obstetrics ; RM Therapeutics. Pharmacology