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Zemmour LabDepartment of Pathology
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Immunologists, biologists, engineers, and physician-scientists — we are deliberately multidisciplinary.

Portrait of David Zemmour, MD, PhD

David Zemmour, MD, PhD

Principal Investigator

Assistant Professor of Pathology

zemmour@uchicago.edu

Hi! Welcome to the lab! I am a physician-scientist and came to Chicago in the Summer of 2022. I love the city, campus, and community here. I did my MD in Paris, France, at the Pierre and Marie Curie Medical school (now Sorbonne University Medical School). I then moved to Boston to pursue a Ph.D. in Immunology at Harvard. With Drs. Benoist and Mathis, two giants of immunology, my love story with regulatory T cells (Tregs) started. I studied their emerging role beyond controlling autoimmunity in regulating tissue homeostasis. By looking at the locus of FOXP3 closely, I made a fun observation that some reads didn’t map to annotated regions and thus discovered FLICR, a new long-non-coding RNA that controls FOXP3’s expression. My research leveraged novel technologies such as single-cell genomics to understand the transcriptional regulation underlying Treg functions in tissues at the basis of Treg molecular engineering methods to promote homeostasis and prevent diseases (such as wound healing, colitis, and diabetes).

After my Ph.D., my curiosity about disease mechanisms and technology drew me to Pathology. I completed a Clinical Pathology residency and a Hematopathology fellowship at Brigham and Women’s Hospital while continuing my work on Tregs. I focused on a rare primary immunodeficiency, IPEX, caused by mutations in FOXP3 that alter Tregs resulting in lethal systemic autoimmunity. Using single-cell genomics, I dissected the molecular mechanism of the disease, i.e., the transcriptional effect of FoxP3 mutations in Tregs, and proposed a two-step pathogenesis model with therapeutic implications.

I am excited to build a community of scientists in the lab, working on T cells, Tregs and I am fascinated by understanding how cells communicate with each other. So simple in appearance but so complex.

Outside the lab, I love spending time with my little family, my badass wife, Chana, an architect, and my children Lea, Naomi, and Raphael. We go to the beach, the museum, and camping. We read, laugh, and live together.

Lab members

Portrait of Antoine Freuchet, PhD

Antoine Freuchet, PhD

Post-doctoral Fellow

freuchet@uchicago.edu

Hi! My name is Antoine, and I am a postdoctoral scholar in the lab since September 2024. I earned my PhD in France, where I focused on Tregs in transplantation. I then moved to San Diego, CA, to study human exTregs, later shifting my research toward the role of autoreactive T cells in autoimmunity in Parkinson’s disease. Currently, my work explores mouse Treg heterogeneity using multi-omics approaches — including scRNA-seq, CITE-seq, and spatial transcriptomics — to define their interactions and functions in steady state and during inflammation. Outside of the lab, I enjoy exploring Chicago, spending time with friends over drinks, running, and reading.

Portrait of Paul Chak Mou Ngai

Paul Chak Mou Ngai

PhD student

Pritzker School of Molecular Engineering

pngai@uchicago.edu

Hello! My name is Paul. I graduated from the University of California, Davis, with a B.S. in Biomedical Engineering. My research utilizes spatial imaging-based transcriptomics and proteomics technologies to unravel tissue-specific Treg signatures, their microenvironmental niches, and Treg ligand-receptor interactions. In my free time, I enjoy gaming, traveling, and cooking dishes from around the world!

Portrait of Emily Schahrer

Emily Schahrer

PhD student

Committee on Cancer Biology

eschahrer@uchicago.edu

Hey! My name is Emily, and I am a PhD student in the Cancer Biology program. I am originally from Seattle, and I graduated from Chapman University with a B.S. in Biochemistry & Molecular Biology and a B.A. in Spanish. I am studying how Tregs can cause off-target inflammation in cancer patients treated with immune checkpoint inhibitors. In my free time, I love to read and go on hikes!

Portrait of Nitya Mehrotra

Nitya Mehrotra

PhD student

Committee on Immunology

nityamehr@uchicago.edu

Hi! I’m Nitya, a PhD student in the Committee on Immunology. My research focuses on using spatial transcriptomics and computational tools to study Treg localization in mice. Outside the lab, I love going to concerts, trying new restaurants in Chicago, and pilates.

Portrait of Layne O'Brien

Layne O'Brien

Research Assistant

obrienm@uchicago.edu

Hi! My name is Layne, and I have been a Research Technician in the lab since June 2025. I received my B.S. in Cell Biology and a minor in Chemistry from Duke University, where I researched growth signaling during Zebrafish embryo development. I came to Chicago to learn multi-omics and quantitative approaches to studying immune cells, which I hope to use in the future to study immune interactions with cancer cells. When not in the lab I enjoy plants, vinyl records, coffee, vintage shopping, and spending time with my cat Luna!

Members of the Zemmour Lab outside on the University of Chicago campus
The lab, 2023.

Alumni

Portrait of Clément Hedde

Clément Hedde

Visiting Student

École Centrale de Lyon, France

In the lab: 2026

Portrait of Youssef Mallou

Youssef Mallou

Visiting Student

Ecole Centrale de Lyon and Lyon Medical School, France

In the lab: 2024

Portrait of Loqmen Anani

Loqmen Anani

Master's student

Ecole Normale Supérieure de Lyon

In the lab: Mar 2023 – Sep 2023

lanani@uchicago.edu

Loqmen joined the lab for an internship from the Ecole Normale Supérieure de Lyon, where he specialized in bioinformatics and in developing methods and models for biology research. In the lab he analyzed microscopy data to understand where Tregs are located in tissue relative to other cells, and modeled the parameters that influence their localization and number.

Portrait of Layan Safi

Layan Safi

Research Associate and lab manager

In the lab: Sep 2022 – Jul 2023

Now: Medical student at Rosalind Franklin University, Chicago, IL

lsafi@uchicago.edu

Layan received a B.A. in Biological Sciences from Macalester College, where she majored in biology and neuroscience studies and minored in chemistry and psychology. Layan intends to pursue a career in healthcare with interests in immunology and pathology. In her free time, she enjoys reading, being outside, and drinking coffee.