Student researchers at the University of 棉花糖直播 at Lafayette are studying human diseases in surprisingly scaly subjects.
Dr. Erika Caramillo-Hatch, an at UL Lafayette, and her student research assistants aim to find answers to some of the mysteries of Alzheimer鈥檚 disease by observing the residents of freshwater tanks.
Examining inch-long, freshwater-dwelling zebrafish can provide insight into certain mental disorders and potentially change the way researchers study those disorders.
Caramillo-Hatch said humans share about 70 percent of their ancestral genes with zebrafish, and that鈥檚 similar enough to compare their brain functions.
鈥淲e鈥檝e all looked into a fish tank and watched them swim and interact with each other, but we might not have known that they were telling us a lot about our own human behavior,鈥 she said.
Scientists have been making similar comparisons between humans and other animals for centuries. Comparative models enable researchers to study human ailments, like cancer and depression, without subjecting humans to their symptoms.
The lab is located at the . There, student researchers reviewed literature produced by researchers at other institutions who鈥檝e studied zebrafish. They found that some have had success replicating conditions like autism and cardiovascular disease.
UL Lafayette researchers want to add Alzheimer鈥檚 disease to the list.
Kris Anderson is among four undergraduate and graduate students who work in the lab. The psychology graduate student said working with zebrafish gives her valuable research experience. Students also practice critical thinking and presentation skills in weekly meetings where they review scientific literature.
鈥淢y goal eventually is to do neuropsychology and being able to do this neuroscience work with Dr. Caramillo-Hatch will give me a lot of clarity and experience for applications to doctoral programs. Many of these skills are transferable to other labs,鈥 Anderson said.
She added that if the lab is successful, it could help provide mid-sized universities and research institutions with a cost-effective method of studying animal models.
Zebrafish are cheaper and smaller than laboratory mice and have a lifespan of almost two years. The zebrafish鈥檚 early development is also easier to study than that of other animals. In addition, they have a hormone called cortisol, a steroid that serves many purposes in the human body, such as regulating metabolism and immune responses, that other animal models don鈥檛 produce.
Zebrafish also exhibit behaviors that are comparable to humans. For example, Caramillo-Hatch noted that when zebrafish swim primarily on the sides of a tank and don鈥檛 explore the middle, it鈥檚 an indicator of anxiety. Much like humans, when zebrafish are stressed or anxious, they are hesitant to leave their comfort zones.
Comparable behaviors like these are integral to Caramillo-Hatch鈥檚 research because they help convey the thoughts of organisms that humans can鈥檛 communicate with.
鈥淵ou can鈥檛 just ask a zebrafish 鈥楬ow are you feeling today?鈥 They can鈥檛 respond like a human would,鈥 she said.
Scientists can induce certain conditions in the zebrafish by changing their environment or diluting drugs in the water they inhabit. By observing their responses, researchers can then better understand how to improve human health and well-being.
Other than mental health and psychology, graduate student Thomas Sease, who is pursuing a master鈥檚 degree in psychology, said the zebrafish research could give other inquiring minds with tighter budgets or smaller laboratories the ability to study pathology in animal models.
鈥淪imply establishing the fish as a good comparative model can give more people the opportunity to do important research. This could be really beneficial.鈥
(Bailey Chenevert is student editor of La Louisiane, the magazine of the University of 棉花糖直播 at Lafayette. Chenevert is a senior psychology major who鈥檚 minoring in journalism. She will graduate in May.)