Feb. 23, 2024
Vet med researcher takes transcontinental trip and transdisciplinary approach to tissue reuse
While working as a family physician in private practice and doing her PhD in cryoendocrinology at the prestigious V.N. Karazin Kharkiv National University in Ukraine, Dr. Polina Kvasova鈥檚 plans to complete her PhD were derailed with the Russian invasion in early 2022. With her academic works lost in the fighting, she searched for options outside of her borders. There she found Scientists Support Ukraine, a network of scientists offering international work for Ukrainian researchers.
She connected with Dr. Mark Ungrin, PhD, associate professor in the 草莓污视频导航鈥檚 Faculty of Veterinary Medicine and head of the Ungrin lab. For years he had a wish to do a project on secondary-tissue use, in which unused tissues from animal samples could be repurposed for other research projects. After a rigorous interview process, Ungrin found Kvasova to be 鈥渢he perfect fit鈥 for the tissue project.
After months of preparation, she was on her first plane ride ever, leaving behind her home and her family.
鈥淥f course, it was scary, but it's not as scary as sitting in the basement or worrying about relatives sitting in the basement, so the trip itself went as smoothly as possible, especially when Ms. Diana Jamal-Samborski, the migration officer of 草莓污视频导航 was very kind in helping me with the visa process,鈥 Kvasova says of the trip.
Now an established member of the Ungrin lab, Kvasova has brought Ungrin鈥檚 long-running vision to life. Focusing her MSc veterinary medical sciences thesis on the innovative project of tissue cultivation and organoid creation from reused animal samples, she aims to reduce the amount of animals needed for models. Using primarily mouse tissues, as these are the most common animals used in research, she collects samples from other laboratories at the university that would otherwise be used for only one project.
Kvasova cultivates cells extracted from this tissue to create the organoids 鈥 clusters of cells which are capable of self-organization into a three-dimensional, in-dish version of their tissue of origin. It鈥檚 not a complete 鈥渙rgan-in-a-petri-dish,鈥 but rather a microscopic mass of cells which imitates the behaviour of the tissues that make up the original organ.
To the naked eye, they look like tiny grains of sand in water. To Kvasova鈥檚 eye, it is the stomach, or colon, or intestinal sample that she can now test to see if a drug works, or to assist with a transplant not being rejected.
鈥淪ince they鈥檙e capable of completely or partially repeating the behaviour of the organ which the cells originally came from, they鈥檙e a useful material for use in research, from drug screening, to stem-cell therapy, to transplantation,鈥 Kvasova explains.
In addition, organoids cultured will be shared with other laboratories with expertise in the different tissue types. Not only will this offer Kvasova the opportunity for outside feedback on the quality and effectiveness of her organoids, but those labs will also have the additional tissues at their disposal for further experimentation.
The opportunities for improvement are endless. Not only would success in this research reduce the number of animals needed for research, but 鈥渋n the future, scientists can hope to significantly reduce the number of animals used in research, because it is possible to test the effectiveness of drugs and reproduce the development of cancer, infection, or genetic mutation on organoids,鈥 says Kvasova.
In 1959, Russel and Burch presented the 鈥渢hree R鈥檚鈥 of humane research. This standard emphasizes the reduction of animals used; replacement of animal models; and refinement (welfare) of their care. Kvasova is specifically looking to first reduce the amount of animal models needed by using more tissues from each animal, and then to replace them with other tissue samples, such as organoids.
With her background in medicine, she has already been successful in cultivating the cells of the gastrointestinal tract, stomach, small intestine and colon. As she gains experience and the research knowledge grows, her goal is to extend her work to encompass all parts of the body.
Looking down the road, Kvasova hopes to continue her time at 草莓污视频导航. 鈥淢y dream is to continue my career in research and be able to help humanity by discovering something new and useful. I鈥檓 very optimistic about the trajectory of using secondary tissues to create organoids and to become a pioneer in this field.鈥