Meet Our Team

Mathieu Wimmer, Ph.D.

Principal Investigator | | @WimmerLab

The once controversial idea that parental experiences, such as stress or diet, can shape the physiology and behavior of their offspring via epigenetic mechanisms has become an active area of research. Dr. Mathieu Wimmer studies the influence of drug abuse in fathers (sires) on future generations. His research program combines animal models of drug addiction and memory formation with molecular biology techniques to investigate the impact of paternal drug taking on drug-related behaviors and memory formation in progeny.

Dr. Wimmer is also interested in epigenetic remodeling events in the brain that underlie these inherited changes in behavior. Dr. Wimmer received his PhD from the University of Pennsylvania under the mentorship of Dr. Ted Abel. His postdoctoral training under the guidance of Dr. Chris Pierce at Penn focused on the transgenerational epigenetics of cocaine addiction. Dr. Wimmer’s research is funded by the National Institute on Drug Abuse.

Dr. Wimmer's Publications

Charlotte Bavley, Ph.D.

Postdoctoral Fellow | @CBavley

Charlotte graduated from Colgate University in 2013 with a degree in neuroscience and biology. Following graduation, she worked as a research technician at McLean Hospital studying the role of muscarinic receptor subtypes in rodent models of cocaine addiction. She then decided to pursue her PhD at Weill Cornell Medicine, where she joined the lab of Dr. Anjali Rajadhyaksha. Her thesis research examined the role of a neuropsychiatric risk gene, cacan1c, in rodent models of relapse behavior, focusing on the neural circuits underlying behavioral phenotypes. In the Wimmer lab, Charlotte is excited to explore the epigenetic and transcriptional changes underlying persistent opioid craving and relapse.

Dr. Bavley's publications

Reza Karbalaei, PhD.

Postdoctoral Fellow

Reza graduated from Tehran University in 2005 with a B.S. in Cell and Molecular Biology. He earned an M.S in Molecular Biology from the national institute of genetic engineering and biotechnology (NIGEB), where his work focused on cloning new genes in the B. subtilis genome. His Ph.D. in Medical Proteomics from Shahid Beheshti University of Medical Sciences focused on the meta-analysis of available high-throughput data on Alzheimer's disease. In the Wimmer lab, Reza has been developing bioinformatic analytical pipelines for large sequencing data sets. His projects are aimed at delineating the molecular signatures associated with chronic drug exposure in reward-related brain regions. He is also continuing to purse meta-analyses of existing data sets related to addiction-like behaviors in rodents and chronic drug use in humans.

Dr. Karbalaei's publications

Caesar Imperio, MD, PhD.

Psychiatry Resident and Postdoctoral Fellow

Caesar graduated from The University of Scranton in 2009 with a B.S. in Neuroscience. Upon completion of his undergraduate studies, he then pursued a Ph.D. in Neuroscience at the Penn State College of Medicine under the mentorship of Drs. Sue Grigson and Bill Freeman. His graduate work focused on developing an animal model that behaviorally stratified animals on their addiction-like behavior based on their avoidance of a natural reward. Furthermore, he also examined the interplay between environmental enrichment and heroin self-administration at the behavioral, genetic, and epigenetic levels. After obtaining his Ph.D. in 2015, Caesar decided he wanted to do more with his knowledge of the basic sciences and integrate it into clinical practice. Therefore, Caesar then enrolled at the Rutgers Robert Wood Johnson Medical School and obtained his M.D. in 2019. Caesar is currently a psychiatry resident on the research track at Temple University. In the Wimmer laboratory, Caesar plans to investigate the molecular changes associated with extended drug abstinence that may influence craving and relapse.

Dr. Imperio's publications

Dana Zeid, PhD.

Postdoctoral Fellow

Dana earned her B.A. in Psychology from Marshall University in 2016. Under the mentorship of Dr. Thomas Gould, she received her Ph.D. in Biobehavioral Health from Penn State University in the summer of 2021. Her graduate research focused broadly on genomic, neurobiological and behavioral underpinnings of learning and addiction in rodent models. Dana joined the Wimmer lab in the Fall of 2021. Her current research interests include mechanisms underlying multi- and transgenerational inheritance of drug addiction phenotypes, as well as the development and study of rodent behavioral paradigms.

Dr. Zeid's publications

Elizabeth Smedley, PhD.

Postdoctoral Fellow | @ebsmed

Beth earned her B.S. in Neuroscience and Behavior from the University of New Hampshire in 2015. While at UNH, she studied thalamic nuclei and their influence in flexible goal-oriented behavior. She then pursued her Ph.D. in Dr. Kyle Smith's lab at Dartmouth College. Her graduate work focused on contributions of ventral pallidum and nucleus accumbens in cue-driven motivation and behavioral phenotypes. She continued as a postdoc for a year in the Smith Lab using optogenetic and chemogenetic techniques to manipulate motivated behaviors. In the Wimmer lab, Beth is looking forward to exploring the multi- and transgenerational impact of drugs of abuse leveraging a combination of behavioral and molecular approaches.

Dr. Smedley's publications

Hannah Mayberry

Ph.D. Student | @HannahLMayberry

Hannah graduated from Virginia Commonwealth University with a B.S. in Biology in 2015. Prior to graduate school, she worked as a research technician in Dr. Thomas Eissenberg’s lab at the Center for the Study of Tobacco Products. She is now entering her fifth year as a Ph.D. student in Temple University’s Cognition and Neuroscience program. Under the mentorship of Dr. Mathieu Wimmer, her thesis focuses on the neural and epigenetic mechanisms contributing to the maintenance of opioid addiction and propensity for relapse, with an emphasis on identifying underlying sex differences. Hannah is interested in delineating epigenetic changes that occur in response to opioid exposure and prime the system for increased craving, as well as behavioral changes that accompany increased craving. A better understanding of these mechanisms may help improve treatments for opioid craving, reduce relapse rates, and improve the harm and stigma associated with opioid use disorder.

Andre Toussaint

Ph.D. Student | @AndreBToussain1

Andre graduated with a Master’s degree in Psychology, with a concentration in Biopsychology, from Hunter College at the City University of New York. While at Hunter College, he was a research fellow studying the neural mechanisms of addiction. For his Master thesis, he investigated methamphetamine-induced conditioned place preference in adolescent male and female mice of two strains, C57Bl/6 and 129/SvEv. After graduating from Hunter College, he joined Dr. Wimmer’s lab as a PhD student in Temple’s Brain and Cognitive Sciences program. Under Dr. Wimmer’s guidance, Andre plans to investigate the transgenerational epigenetics of drug addiction. In his free time, he enjoys listening to music, visiting the Caribbean and reading.

Joanna Severino Perez

Ph.D. Student

Joanna graduated from the University of Massachusetts Boston with a B.S. in Biology in May of 2021. While at the University of Massachusetts Boston, Joanna was a research assistant in Dr. S. Tiffany Donaldson's lab where she studied environmental enrichment as a treatment for hypoxic-ischemic encephalopathy. She also contributed to work concerning the effects of amphetamine exposure in adolescent rats. She joined the Wimmer lab as a PhD student in fall 2021 and hopes to investigate the epigenetics of chronic drug use and how drug addiction may contribute to cognitive deficits. Outside of the lab, Joanna likes making and listening to music, fitness, and reading comics.

Paris Roserie

PhD Student

Paris graduated from the Florida Institute of Technology with a B.S in Psychology and specialization in Neuropsychology. While completing his undergraduate degree, his research under the tutelage of Dr. Webbe focused on concussion testing in patients using an objective Virtual Reality system (NVIT). Paris then joined Drs. Mihailidis and Khan's laboratories at the University of Toronto where he helped develop and Artificial Intelligence Response System for fall detection. Paris joined the Wimmer lab as a PhD student in the Fall 0f 2021. He plans to investigate the epigenetic processes contributing to substance abuse and addiction-related behaviors. In his free time, Paris enjoys listening to musing, working on his vacation rental business and traveling.

Carmen Dressler

Research Technician

Carmen Dressler graduated from Temple University with a B.A. in Neuroscience in December of 2020. She joined the Wimmer lab as a laboratory technician in February 2021. Carmen is excited to participate in the research dedicated to the effects of opioids on memory and addiction. In the future, she plans on attending medical school and pursuing a career as an emergency medicine doctor.

Heather DeSalvo

+1 Master Student | @DeSalvoHeather

Heather is majoring in Neuroscience in the College of Liberal Arts (Class of 2021) and is minoring in Chemistry. She joined the Wimmer Lab in June 2018 and is excited to learn about research on addiction and its societal applications. Heather plans to attend medical school after graduation.

Benjamin Dunham

Master Student

Ben is currently a Master student in the Neuroscience program. He joined the Wimmer lab in 2020 after graduating from Rowan University. Ben is broadly interested in epigenetic processes associated with addiction and new animal models for pain research. He plans to pursue his Ph.D in the future and is excited to expand his research experience. In Ben’s spare time he loves to play Dungeons and Dragons and Magic the gathering.

Maina Beauplan

Master Student

Maina graduated from Rider University in 2020 with a B.S in Behavioral Neuroscience and a minor in Psychology. While at Rider she was an undergraduate researcher in a circadian physiology lab. Maina is now a Master student in the Neuroscience Program at Temple and has joined the Wimmer lab in the Fall of 2020. She looks forward to learning more about the influence of opioid exposure on future generations and aspires to pursue a Ph.D in Neuroscience in the future.

Charita Kunta

Undergraduate Student | @Charita_Kunta

Charita is currently majoring in Neuroscience, as well as minoring in Global Studies and a certificate in Genome Medicine (class of 2022). She joined the Wimmer lab in the Spring of 2019, and is excited to gain scientific insight into addiction and memory. After graduation, Charita hopes to attend medical school and pursue a surgical career in the field of Obstetrics and Gynecology.

Cindy Lam

Undergraduate Student

Cindy Lam is a CLA Neuroscience major at Temple (Class of 2022). She joined the Wimmer Lab in the Fall of 2019. Cindy's project focuses on the influence of the estrous cycle on drug craving in females using the rodent incubation of craving paradigm. After graduation, Cindy plans on pursuing a career in biomedical research and medicine.

Priya Doshi

Undergraduate Student

Priya is majoring in Psychology with a minor in Cognitive Neuroscience (class of 2022). She joined the Wimmer Lab in the Spring of 2020 to gain a deeper understanding of epigenetic mechanisms underlying addiction and relapse vulnerability. Priya hopes to attend medical school in the future with a potential specialty in child psychiatry or pediatrics.

Citlalli Tomas Baltazar

Undergraduate Student

Citlalli is currently majoring in Neuroscience (Class of 2023) and is also minoring in Accounting. She joined the Wimmer Lab in the Fall of 2020 and hopes to learn more about the STEM research field as well as gain knowledge about drug addiction and epigenetics. After graduation, Citlalli plans on applying to graduate schools and getting more research experience.

Mariyah Jiwanji

Undergraduate Student

Mariyah is currently majoring in Neuroscience, as well as minoring in Public Health with a certificate in American Sign Language (class of 2023). She joined the Wimmer lab in the fall of 2020 in order to better understand the relationship between environment and addiction-like behaviors. Mariyah is also interested in the neurobiology of relapse. She hopes to pursue a PhD in Neuroscience in the future.

Ricardo Fortuna

Undergraduate Student

Ricardo is majoring in Neuroscience in the College of Liberal Arts, as well as minoring in Spanish and Psychology. He joined the Wimmer lab in August 2020 and is excited to learn more about research in addiction. He hopes to attend the 4+1 program at temple and get a PhD after graduation

Camryn Krumbhaar

Undergraduate Student

Camryn is pursuing a BS in Neuroscience in the College of Liberal Arts with a minor in Sociology of Health. She is part of Temple's Honors Program and plans to graduate in May 2024. Camryn intends to enter medical school after graduation and aspires to complete a residency in pediatrics, following with sub-specialization in pediatric emergency medicine or pediatric oncology. She is very passionate about public health and hopes to gain experience within both the lab and the community. Camryn is also the volunteer Chair for the Public Health Club FIMRC and is a member of Temple's Phi Delta Epsilon Chapter for pre-medical students. She hopes to work on the epigenetic inheritance project, examining how antenatal opioid exposure impacts future generations.

Kiera Caldwell

NIDA Summer Intern

Kiera is a rising senior at Lafayette College, majoring in Neuroscience with a minor in Women, Gender and Sexuality Studies. She joined the Wimmer lab in June 2021 after securing an internship through the National Institute on Drug Abuse (NIDA). She hopes to gain a better understanding of the epigenetic mechanisms behind drug addiction as well as latent sex differences. After graduating, Kiera hopes to pursue a PhD in Neuroscience.

Chethan Reddy

Undergraduate Student

Chethan is majoring in Neuroscience in the College of Liberal Arts (Class of 2023) at Temple University. He joined the Wimmer Lab in Spring 2020 and his project is focused on the role of chemokines in addiction. His research examines the effect of novel chemokine receptor antagonists on modulating the reinforcing efficacy of opioids and other reinforcers. After graduation, Chethan plans on attending medical school and he aspires to become a physician.

Maria Amaro

Undergraduate Student

Maria is majoring in Biology with a minor in Clinical Health Psychology at Temple University (Class of 2022). She joined the Wimmer lab through the Diversity Scholars Program at the Lewis Katz School of Medicine at Temple University over the summer of 2021. She hopes to gain experience in research and learn more about addiction and epigenetics. After graduation she plans on attending medical school.


Angela Bongiovanni, B.S. Neuroscience 2017; former lab manager and lab technician

Elizaveta Valovatsky, Former BRIDGE Scholar - 2021

Sydney Hewitt, B.S. Neuroscience 2021

Dyess Ellis, B.S. Neuroscience 2021

Danait Selamawi, B.S. Neuroscience 2020

Sydney Famularo, B.S. Neuroscience 2019; former lab technician

Chau Do, B.S. Neuroscience 2020

Sam Schumacher, B.S. Neuroscience 2020

Abubakar Elhassan, Diversity Scholar, summer 2020

Drew Peterson, PhD, Former Postdoc

Tara Thompson-Felix, MD. Former Postdoc/Psychiatry Resident

Tamia Johnson, Diversity Scholar, summer 2019

Annaka Westphal, NIDA Summer Intern 2019

Colin Pierce, Former Webmaster and Research Assistant, Temple Class of 2021

Rachel Carpenter, B.A. Psychology 2018; M.S. Neuroscience 2019

Shivam Bhakta, B.S. Neuroscience 2019

Sara Downey, B.S. Neuroscience 2018, M.S. Neuroscience 2019

Kyle Peer, M.S. Neuroscience 2018

Alexandra Ellis, B.S. Neuroscience 2017; former lab manager and technician

Anna Kolesnik, B.S. Neuroscience 2017

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