British Medical Journal<\/em>, Copik showed that her energized NK cells may improve the performance of cancer immunotherapy treatments that are currently under development. Such treatments work by unleashing the power of our immune system to fight cancer.<\/p>\nMany of the successful therapies block specific molecules, such as PD-L1, that stop our immune system from eliminating tumor cells. However, many of these therapies only work for a small portion of patients. So scientists are looking for other molecules that cancer may use to hide itself from being attacked by immune cells. One of such promising molecules for developing new treatments is called TIGIT (T cell immunoreceptor with Ig and ITIM domains). Initial preclinical and early clinical research studies of TIGIT therapies showed promise. They greatly improved outcomes for patients being treated with currently approved immunotherapies and extended the immunotherapy benefits of these therapies to even more patients.<\/p>\n
However, interim results of phase three clinical trials of patients with lung cancer have so far not delivered on the therapy\u2019s initial promise. This has prompted scientists to search for why these TIGIT drugs could be failing and to identify alternative therapeutic strategies.<\/p>\n
Copik believes NK cells might be a solution to the challenges faced by TIGIT-targeted therapies. NK cells are critical to the efficacy of immunotherapies, including those targeting TIGIT, and the UCF researcher\u2019s published results suggest that TIGIT therapies may not have worked well because some of them can destroy NK cells. In a prior work funded by the Florida Department of Health James and Esther King Biomedical Research Program and conducted by former postdoctoral student Faqrul Hasan, Copik\u2019s team reported that functional, highly activated NK cells that are better at killing cancer also have a high number of TIGIT molecules on their surface. Since most of the therapeutic TIGIT antibody candidates bind to TIGIT and also mark those cells for destruction by the immune system, including by NK cells, the team hypothesized that activated NK cells may also be eliminated.<\/p>\n
The scientists tested this hypothesis in the lab and found that when NK cells have TIGIT antibodies attached to their surface, the NK cells commit fratricide, killing each other off. The UCF scientists found that the fratricide effect could be prevented by genetically engineering NK cells to remove their TIGIT molecules. The team thinks that the destruction of NK cells may be a potential reason why some of the anti-TIGIT candidates have not been performing as expected in clinical trials. This work was performed in collaboration with physician and Professor of Pediatrics Dean Lee and his team at Nationwide Children\u2019s Hospital. The collaborative team also found that NK cells that were genetically modified to lack TIGIT were also more metabolically \u201cfit\u201d and better at killing cancers. The team has shown that getting rid of the TIGIT \u201cbrake\u201d on NK cells makes them better cancer killers, even without introducing other immunotherapy drugs.<\/p>\n
Copik says the goal of her research is to \u201ctry to outsmart cancer.\u201d<\/p>\n
\u201cBut we have learned that nature is devilishly smart,\u201d she says. \u201cWe are hoping that by studying how tumors and immune cells respond and evolve after drug treatments, we will be able to devise better combination treatment strategies to improve outcomes for cancer patients.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"
Associate Professor of Medicine Alicja Copik is using the human body\u2019s own natural killer cells to fight deadly pediatric cancers and improve immunotherapy.<\/p>\n","protected":false},"author":242,"featured_media":139007,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"lazy_load_responsive_images_disabled":false,"footnotes":"","_links_to":"","_links_to_target":"","_wp_rev_ctl_limit":""},"categories":[15992,5,12,17,24],"tags":[15972,653,979,22543,14916,202],"tu_author":[],"class_list":["post-139005","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alumni","category-colleges","category-health","category-medicine","category-science-technology","tag-alicja-copik","tag-burnett-school-of-biomedical-sciences","tag-college-of-medicine","tag-healthcare","tag-research","tag-alumni"],"yoast_head":"\n
UCF \u201cBeefing Up\u201d Natural Killer Cells to Stop Cancer | 海角直播 News<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n \n \n\t \n\t \n\t \n