• Kara Gross Margolis, MD

    Principal Investigator

    photo of Kara Gross Margolis
  • Marguerite Bernard

    Marguerite is a master’s candidate in human nutrition at Columbia University. She received a BS in industrial and systems engineering from Georgia Tech (’18) and joined the Margolis Lab in 2020 as part of her thesis work. In her free time, Marguerite enjoys going to comedy shows, playing volleyball, and exploring the city with friends.

    photo of Marguerite Bernard
  • Andrew Del Colle, MS

    Andrew received a BA in economics from the University of North Florida (‘15) and is currently completing his thesis for his master's degree in Human Nutrition from Columbia University. In his free time, Andrew enjoys basketball, cycling, and going to the movies.

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  • Zixing Huang, MS

    Zixing received her bachelor’s degree in business administration at Fordham University (18’) and master's degree in human nutrition at Columbia University (20’). She joined the Margolis Lab in 2020. She enjoys playing musical instruments, hiking, and practicing pilates in her free time. 

  • Lin Hung, PhD

    Lin completed her BSc (Hons) and PhD in enteric neurophysiology from the University of Melbourne in Australia. She joined the Margolis Lab in 2019. Her research focus is the multifaceted roles of serotonin in disorders of the gut-brain axis, where serotonin has the potential to be pathophysiological and therapeutic. In her spare time, Lin enjoys traveling and exploring new places, and she hopes to visit many cities and states during her time in the US.

    photo of Lin Hung
  • Narek Israelyan, MS

    Narek is a medical student at Columbia University. He received his undergraduate degree in neuroscience from University of California Irvine ('13) and joined the Margolis Lab in 2014 while pursuing a master's degree in human nutrition from Columbia University. He is an aspiring physician-scientist who hopes to one day change the climate of pharmaceutical production and distribution in the US. In his spare time, Narek enjoys traveling, hiking, and spending an inappropriate amount of time playing with cats.

    Headshot of Narek Israelyan, MS
  • Moneek Madra, PhD

    Moneek Madra received her BS degree in biological sciences from University of Windsor, her MS in human nutrition from Columbia University, and her PhD from Columbia University in nutritional and metabolic biology. Her research focuses on early life stress induced models of long-term dysfunction in the gut-brain axis.

    Headshot of Moneek Madra, PhD
  • Melissa Medina¬†

    Melissa received her BS in biological sciences from Cornell University (‘19) and joined the Margolis Lab in 2020 while pursuing a master's degree in human nutrition at Columbia University. She is an aspiring physician who hopes to leverage her nutrition background to better equip her for a career in medicine. In her spare time, she enjoys reading, yoga, long road trips, and hiking with her dog.

  • Sarah Najjar, PhD

    Sarah is a postdoctoral researcher in the Margolis Lab. She received a BS in biology from the University of Central Florida (2013) and a PhD in neuroscience from the University of Pittsburgh (2020). Sarah completed her dissertation research on the role of the colon epithelium in visceral nociception and gut motility. She is currently studying how epithelial serotonin influences the visceral hypersensitivity associated with gut-brain disorders. Outside the lab, Sarah enjoys reading, playing music, and trying out new vegan recipes.

    photo of Sarah Najjar
  • Roey Ringel

    Roey is an undergraduate student on the pre-medical track at the School of General Studies at Columbia University. He joined the Margolis Lab in 2018 and in his free time enjoys traveling, running, and playing lacrosse. 

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  • Ruxandra Tonea

    Ruxandra is an undergraduate student studying biomedical engineering and statistics at Columbia University. She aspires to get a PhD and make use of both biology and computational science to solve and understand diseases. In her free time she enjoys listening to music, dancing, and taking long walks.

    photo of Ruxandra Tonea