Student testimonial

Rick Markus: Yes, worms can get drunk too!

Alcohol is a widely used drug around the world. While alcohol consumption is generally experienced as pleasurable, it has disastrous consequences for those that have become addicted to it. Interestingly, prior research has shown that the risk for developing alcoholism is partly determined by your genes. This means that certain mutations provide you with a higher risk for developing alcoholism. And since we all have slightly different mutations (alleles), we all have slightly different risks for developing alcoholism. However, to date, little is known about which specific mutations increase the risk for developing alcoholism. In my 24 ECTS BSc thesis, I investigated whether we could use the model organism Caenorhabditis elegans to find out which mutations increase one’s alcoholism risk. Knowing these mutations could improve alcohol addiction diagnosis and medicine development.

Rick Markus
I enjoyed the freedom I was given during my thesis to focus on the subjects that I was interested in most
Rick Markus

Research on alcoholism is complex and often focusses on specific traits that are related to alcoholism. One of those traits is how quickly somebody feels the (intoxicating) effects of alcohol. People that are relatively resistant against the intoxicating effects of ethanol have a higher risk for developing alcoholism. In my thesis, I counted the amount of offspring that genetically diverse C. elegans lines produced under several alcohol concentrations to estimate how prone these lines are to the effects of alcohol. I found that the C. elegans lines differed in their response to alcohol. Moreover, the lines of which the amount of offspring was relatively unaffected upon alcohol consumption likely contain mutations that cause a high risk for developing alcoholism. Future experiments should be focussed on identifying these specific mutations and determining their location on the genome. This can be achieved by performing so called QTL mapping experiments.

Overall, I learned a lot during my time at the Laboratory of Nematology. While the experimental techniques I performed were quite basic, I read a lot of literature about the widely used advanced genetic tool called QTL mapping. I also delved into the world of R, and learned a lot about analyzing and visualizing data in R. I enjoyed the freedom I was given during my thesis to focus on the subjects that I was interested in most. I also had the opportunity to set up and execute some of my own experiments. The people at Nematology are friendly and always willing to help. They also organize fun activities for you to participate in like a Sinterklaas visit and a Christmas lunch. To conclude, I liked my time at the Laboratory of Nematology and got the opportunity to develop myself in multiple areas during my thesis.