Dr. Mollie Meffert
Principal Investigator | she/her/hers
Dr. Meffert received her undergraduate degree (BS) from Stanford University. She earned her MD/PhD in neuroscience from Stanford University School of Medicine and completed a postdoctoral fellowship at California Institute of Technology prior to joining the faculty at Johns Hopkins School of Medicine where she is now an Associate Professor in the Department of Neuroscience. When not with the amazing people in her lab (and sometimes with them), she enjoys climbing, nature, art, chocolate, and spending time with her family.

Our Team

Bonita Powell (she/her/hers)
Ph.D. Candidate | BCMB
Bonita is a Ph.D. candidate in the Biochemistry Cellular and Molecular Biology graduate program. She earned her B.S. and M.S. in Biology and Applied Molecular Biology from the University of Maryland Baltimore County (UMBC). Bonita is currently investigating viral-host RNA-RNA interactions in the nervous system.

Emily Eiss (she/her/hers)
Ph.D. Candidate | BCMB
Emily attended Penn State Behrend where she pursued her love of science in the form that NWPA does best: salamanders and potatoes. Now, as a doctoral candidate in the BCMB program, Emily studies microRNA impact on mitochondrial gene expression. She is passionate about scientific communication and advocating for women in science and hopes to one day have her own lab. Outside of science, Emily loves threadwork crafts and her cat, Murray (who is named after miRs!).

Ariella Kornfeld (she/her/hers)
Ph.D. Candidate | BCMB
Ariella is from upstate NY and studied Biology and Chemistry at Skidmore College. Before coming to Hopkins, she worked on structural biochemistry and microbiology projects. Now, she is excited to begin her thesis project studying the subcellular localization of the RNA-induced silencing complex. Outside the lab, Ariella loves all things outdoors - catch her rock climbing, running, or hiking! She also enjoys cooking, reading, and spending time with friends.

Sydney Pettit (she/her/hers)
Ph.D. Candidate | BCMB
Sydney graduated from Virginia Commonwealth University with her B.S. in Biochemistry. While there, she worked in Dr. Soma Dhakal’s lab to help design DNA-based single-molecule sensors. Later, she became a Postbaccalaureate IRTA Research Fellow at the NIH under the supervision of Dr. Richard Proia and studied gene editing as a treatment for specific neurodegenerative diseases. In the Meffert lab, Sydney is excited to investigate microRNAs in the context of neurological disorders. When she’s not behind the bench, Sydney enjoys visiting new restaurants and coffee shops, going to concerts, and weekend getaways to cool new places.

Anselmo Rivera
Undergraduate
Anselmo is from Lawrenceville, Georgia, and attends Johns Hopkins University as an undergraduate. Fueled by his interest in the brain, he is majoring in neuroscience with a minor in psychology and is also a SURFiN fellow where he is pursuing his interest in the brain sciences. Outside of academics, Anselmo enjoys a variety of hobbies, including soccer, tennis, golf, fishing, skating, ukulele, skateboarding, and video games.

Celeste Morales
PREP Scholar
Celeste received her Bachelor’s degree in Molecular and Cell Biology from UC San Diego. At UCSD, she discovered her love for neuroscience through her experiences studying post-translational modifications of synaptic proteins in the Alzheimer’s Disease model. Now at Johns Hopkins, she is a PREP scholar and is excited to apply her interests to studying post-transcriptional regulation of gene expression by microRNA. In her free time, Celeste enjoys hiking or being in nature in general, attending concerts, and going thrifting.
Recent Awards to our Trainees
2025 P.E.O. Scholar Award | Emily Eiss
2025 NSF Graduate Research Fellowship Program Honorable Mention | Sydney Pettit
2024 NIH F31 Predoctoral Fellowship | Emily Eiss
2024 Simons Foundation Undergraduate Research Fellowship in Neuroscience | Anselmo Rivera
2024 HHMI Gilliam Fellowship | Bonita Powell
2024 Eric C. Aker Scientist Award | Xinbei Li
2023 US Association for the Study of Pain July Trainee Spotlight | Xinbei Li
2023 NSF Graduate Research Fellowship Program Honorable Mention | Emily Eiss
Recent Lab Alumni
2025 Xinbei Li | Doctoral Student (BC)
2024 Ian Chen | Master’s Student
2024 Daniel Jin | Undergraduate
2023 William T. Mills IV | Doctoral Student (BC)
2023 Sreenivas Eadara | Undergraduate & Master’s Student
2023 Max Pizzaro | Lab technician
2022 Amanda Maytin | Undergraduate & Lab technician
2022 Deepa Ravindra | Undergraduate
2021 Uche Onuchukwu | Lab technician
2021 Manasi Inamdar | Lab technician
2021 Noor Nassar | Undergraduate
2020 Kowsar Ahmed | Undergraduate

