Since my first blog post, I’ve conducted twelve additional experiments, mainly working to optimize conditions for the big experiment that I will be conducting in about two weeks. I spent about six weeks attempting to optimize an LDH assay (which measures the amount of lactase dehydrogenase, a chemical produced in the endogenous metabolic pathways of all cells that is released when they lyse). My supervisor believed that this assay would be a good measure of immune system activity against tumor cells, as the immune cells would attack the tumor cells, causing the release of LDH. This assay also does not use any radioactive substances and so is safe and easy to handle. Unfortunately, we ultimately determined that the LDH assay was not sensitive enough for our purposes, and so we had to move back to the old, tried-and-true method that involves labeling cells with radioactive chromium. So far we’ve conducted a few different experiments using this method, and we were very happy to see that it has worked every time. As my supervisor remarked, sometimes the old way is the better way, even if it does mean working with radioactive isotopes. Now that we have a working assay, I will be conducting an experiment to see whether our experimental compound increases the immune cells’ ability to attack the neuroblastoma tumor cells. This experiment will be a big undertaking, involving about 15 hours of work, several different experimental groups, and numerous controls, so we are crossing our fingers that we will get the results we desire.
I am gaining confidence in my technical abilities, which was a major goal of mine before the summer began. Despite the fact that many of the experiments we ran had systematic errors, I’ve been able to learn a variety of research techniques through running these different experiments. I’ve become quite competent at cell culture, which is a heavily-utilized technique across the biomedical sciences. I’ve learned how to isolate immune system cells from rat spleens and whole human blood, as well how to prepare blood serum for analysis. Overall I’ve become more independent in the lab, in terms of planning and running experiments and analyzing data. Additionally, I’ve gained a deeper understanding of the scientific research process, as I’ve now seen that despite extensive planning, research is rarely linear; the twists and turns can nonetheless be valuable learning experiences.
Since my internship is academic in nature, it has aligned nicely with my experiences at Brandeis. I’ve been able to apply some of the molecular biology and immunology knowledge that I’ve gained through my coursework at Brandeis. However, I’ve also seen that research, unlike school, is a collaborative effort so being able to work with a team is very important to the process. I’ve also seen that even when the theoretical concepts are clear, the logistics of planning and running experiments can be complex. This has shown me how the “real world” connects to the science that I learn in lecture; there is more to being a scientist than just having an academic understanding of science.
In conclusion, while the research itself has definitely felt slow-going at times, I am excited to test our experimental compound in a couple of weeks and am hopeful that the weeks of optimizing will pay off. Nonetheless, I have grown through this experience and have gained a good understanding of the research process, which has been informative to my career exploration of fields related to veterinary medicine.
Michelle Oberman, ’16
