Midavaine Lab
Midavaine Lab: Neuroscience

Biology of sex differences

We study how sex chromosomes and hormones shape health and disease.

Specifically, we focus on mechanisms of sex differences in pain, reproduction, and cancer immunity.

01 — Research

How sex shapes the nervous system.

Women carry a disproportionate burden of chronic pain and of the autoimmune diseases that cause it, and pregnancy remodels the nervous system in ways we are only beginning to map. Our lab works at the junction of these problems.

I

Sex differences in pain

Chronic pain is far more prevalent in women, yet most of what we know about pain circuits comes from male animals. Using genetic models, single-cell omics, and in vivo calcium imaging paired with behavior, we ask:

  • How do sex hormones influence inflammatory and neuropathic pain?
  • How do sex chromosome complement and dose shape the identity and function of pain-sensing neurons?
II

Immune control of pain

Autoimmune diseases such as lupus and multiple sclerosis are also strongly sex-biased, and pain is among their most disabling symptoms. Using patient samples and human sensory neurons, we study:

  • How human inflammatory diseases cause pain, and how we can treat it better.
  • How sex hormones and chromosomes shape the immune responses that change behavior.
  • How the nervous system controls immunity to breast cancer and other tumors.
III

Neurobiology of pregnancy

Pregnancy imposes a state of profound neuronal adaptation. We study:

  • How the nervous system changes during pregnancy to build resilience.
  • How the nervous system, in turn, shapes a successful pregnancy.
  • How maternal pain, and the treatments for it such as opioids, affect the offspring.

Together, this work aims to define the molecular signature of pain and to open paths to treatment that work across sexes.

02 — People

People

Élora Midavaine

Élora Midavaine, PhD

Principal Investigator

Élora Midavaine grew up in Quebec and studied mechanisms and treatments of cancer pain during her PhD at the Université de Sherbrooke. She then trained as a postdoctoral fellow with Allan Basbaum, PhD, at the University of California, San Francisco, where she studied how sex differences in the immune system lead to female-selective mechanisms of pain regulation.

Funding: NIH · CIHR · FRQS · Sandler Foundation

03 — Papers

Publications

* equal contribution  ·  † corresponding author  ·  PubMed

2026
Sex-specific mechanisms of chronic pain. Review
Venkataraman A*, Midavaine É*, Ingraham HA
2025
A neurotensin receptor type 1-derived pepducin acts as a biased allosteric modulator to regulate target receptor function.
Brouillette RL, Lussier F, Breault É, Meneboo N, Hassanzadeh M, Tremblay V, Chartier M, Midavaine É, Ulrich L, Côté J, Blais V, Mona CE, Longpré JM, Grandbois M, Boudreault PL, Audet M, Besserer-Offroy É, Sarret P
Keratinocyte–TRPV1 sensory neuron interactions in a genetically controllable mouse model of chronic neuropathic itch.
Crowther AJ, Kashem SW, Jewell ME, Le Chang H, Midavaine É, Rosa Casillas M, Danchine V, Rodriguez S, Kania A, Chen R, Braz JM, Basbaum AI
Meningeal regulatory T cells inhibit nociception in female mice.
Midavaine É, Moraes BC, Benitez J, Rodriguez SR, Braz JM, Kochhar NP, Eckalbar WL, Tian L, Domingos AI, Pintar JE, Basbaum AI, Kashem SW
2024
Regulatory T cell-derived enkephalin gates nociception. Preprint
Midavaine É, Moraes BC, Benitez J, Rodriguez SR, Braz JM, Kochhar NP, Eckalbar WL, Domingos AI, Pintar JE, Basbaum AI, Kashem SW
Discovery of a CCR2-targeting pepducin therapy for chronic pain.
Midavaine Ɇ, Brouillette RL, Théberge E, Mona CE, Kashem SW, Côté J, Zeugin V, Besserer-Offroy É, Longpré JM, Marsault É, Sarret P
Mechanistic insights into the role of the chemokine CCL2/CCR2 axis in dorsal root ganglia to peripheral inflammation and pain hypersensitivity.
Dansereau MA, Midavaine É, Bégin-Lavallée V, Belkouch M, Beaudet N, Longpré JM, Mélik-Parsadaniantz S, Sarret P
Glial and neuroimmune cell choreography in sexually dimorphic pain signaling. Review
Midavaine Ɇ, Côté J, Marchand S, Sarret P
2020
Brain irradiation leads to persistent neuroinflammation and long-term neurocognitive dysfunction in a region-specific manner.
Constanzo J*, Midavaine É*, Fouquet J, Lepage M, Descoteaux M, Kirby K, Tremblay L, Masson-Côté L, Geha S, Longpré JM, Paquette B, Sarret P
Prog Neuropsychopharmacol Biol Psychiatry · doi:10.1016/j.pnpbp.2020.109954 · PMID 32360786
2019
Dichotomic effects of clinically used drugs on tumor growth, bone remodeling and pain management.
Barrière DA*, Midavaine É*, Doré-Savard L, Kirby K, Tremblay L, Beaudoin JF, Beaudet N, Longpré JM, Lecomte R, Lepage M, Sarret P
2016
Functional inhibition of chemokine receptor CCR2 by dicer-substrate-siRNA prevents pain development.
Bégin-Lavallée V*, Midavaine É*, Dansereau MA, Tétreault P, Longpré JM, Jacobi AM, Rose SD, Behlke MA, Beaudet N, Sarret P
2013
Mammary cancer bone metastasis follow-up using multimodal small-animal MR and PET imaging.
Doré-Savard L, Barrière DA, Midavaine É, Bélanger D, Beaudet N, Tremblay L, Beaudoin JF, Turcotte EE, Lecomte R, Lepage M, Sarret P
04 — Join

Join the lab

We study how sex shapes the nervous system, from pain and immunity to pregnancy. We welcome people from all backgrounds and disciplines, and we work with each trainee toward their long-term goals.

Who we are looking for

We are recruiting postdoctoral fellows, physician-scientists, graduate, medical, and undergraduate students, and a technician. We have a particular interest in people with a grounding in molecular and cellular biology, immunology, or neuroscience who want to bring it to the biology of sex differences. We encourage independence.

How to apply

Email the PI with a brief statement, one to two paragraphs, describing the questions or projects that interest you, your background, and your long-term goals, and attach a CV.

elora.midavaine@ucsf.edu

05 — Contact

We look forward to academic and industry collaborations.

The lab is at the Mission Bay campus of the University of California, San Francisco.

Address

University of California, San Francisco
Mission Bay campus
[BUILDING AND ROOM]
San Francisco, CA 94158