Joyce Ohm's efforts to grow an eager and dynamic research group on campus are paying off
Bibliographic record
Abstract
Joyce Ohm's efforts to grow an eager and dynamic research group on campus are paying off For Joyce Ohm, the love of science began in seventh grade with a simple science fair project. What she didn't expect was that her passion would lead her to become one of the University of North Dakota's leading epigenetics researchers. "For my science fair project, I fed my rats caffeine and watched to see what happened with them," Ohm said. "I entered the Detroit Metropolitan Science Fair and my project did well there and I just enjoyed the whole process." Ohm, an assistant professor of biochemistry, pursued her passion into college and it was then when she was introduced to epigenetics. Epigenetics is the study of heritable changes that influence how the genetic code is expressed. It can be affected by environmental factors, by nutrition decisions or by lifestyle choices. "I was in grad school when epigenetics was first being introduced," Ohm said. "I went to a day-long symposium on it and ended up being fascinated by all of it." Ohm went on to do a postdoctoral stint with one of the founders of the epigenetics field, Stephen Baylin, of Johns Hopkins University. Ohm came to UND three years ago and has been working hard to put together an epigenetics group on campus. "We're up to 20 labs now," Ohm said. "It's a young and excited faculty and that's been a big push for me in the last couple of years." Ohm is a cancer biologist by training and a lot of what has been done in the field of epigenetics has been done in cancer research. "I study how our bodies interact with the environment," Ohm said. "So I look at how environmental influences like herbicides, pesticides, diets and nutrition affect a person's epigenetic programming." The epigenetics group has been working really hard to build a center for epigenomics and epigenetics research here at UND. "North Dakota is an interesting place to do research because it has such an aged population," Ohm said. "We know that many of these diseases affecting our aged population have epigenetic components." Studying epigenetics at UND alongside Ohm is Assistant Professor of Biochemistry and Molecular Biology Archana Dhasarathy. Like Ohm, Dhasarathy took an interest in science after attending a science fair where someone was presenting on plant genetics. "I thought it was really interesting how scientists could use mathematics to predict what the outcome of a plant cross would be based on the genetics," Dhasarathy said. Dhasarathy, a native of India, knew she wanted to study molecular biology, but at the same time there was no available undergraduate degree in the subject. Instead, she worked towards an undergraduate degree in zoology with a minor in chemistry. She then moved to the United States to get her Ph.D., at Texas A&M University in the department of biochemistry and biophysics. "I was on my third lab rotation at Texas A&M, when I began working in a yeast chromatin biology lab," Dhasarathy said. "I was really fascinated with how a set of yeast genes was activated, merely by changing concentrations of phosphate in its environment, which led me to the field of epigenetics." Dhasarathy started out as a chromatin biology researcher in which her purpose was to study how genes were 'turned on' and 'turned off.' Or in other words, how genes were activated and repressed. Her lab is now focusing on the "snail gene" and its role in cancer metastasis. In early embryonic development, some cells have to move in a process called gastrulation, which is an essential first step to form the different organs and tissues that make up the body. The movement of these cells is guided by the snail protein. snail essentially allows cells to move: if you lose expression of snail, cells do not move at the appropriate time, resulting in loss of development, so the embryo ultimately dies. While expression of the snail gene is essential for embryonic development, it is detrimental in cancer because here, expression of snail causes cancer cells to move into a process called metastasis. "I'm trying to identify the epigenetic causes for snail expression and its consequences," Dhasarathy said. Ohm and Dhasarathy believe that UND has what it takes to become a prime research facility for epigenetics. "Joyce and I really want to put UND on the epigenetics map and prove that UND is a great place to do epigenetic research," Dhasarathy said. "UND is a really unique place to work and it's an opportunity for all of us researchers to come together like we do," Ohm said. "In larger institutions, you would never have people studying all these different aspects of research and interacting with each other like we are able to do here. "We are able to help move things forward a little faster and that's one of the things I love about working here." Emily Aasand University and Public Affairs student writer
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.018 | 0.035 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.015 | 0.006 |
| Scholarly communication | 0.013 | 0.010 |
| Open science | 0.003 | 0.016 |
| Research integrity | 0.007 | 0.022 |
| Insufficient payload (model declined to judge) | 0.138 | 0.096 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".