Faculty profile

Natalie Castellanos Ryan

ResearcherPsychiatryMcGill University

This profile is built from public research funding records (CIHR, NSERC and SSHRC) and PubMed. We have not imported them from a McGill University directory, so their courses and email address may be missing. Find their university profile.

Natalie Castellanos Ryan

Researcher

Psychiatry

Health Sciences

McGill University

Montreal, Quebec, Canada

Supervision signals

Has led research grants, which requires an independent research appointment. Ask their department whether they supervise graduate students.
29 publications in the last five years, latest in 2026.
Senior (last) author on 9 recent papers, a sign of leading a research group.
Principal investigator on 2 research grants (2 CIHR), most recently in 2021.

These signals come from public records, including CIHR, NSERC and SSHRC funding decisions. Ask the professor or the graduate program whether they are taking new students.

Academic metrics

Publications

Citations

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Collaborators

Grants

Publications by year

Counts cover the works listed on the university profile; citation counts come from Dimensions.

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Signals and details

Research

Adolescents And Youths Anxiety Cannabis Use Causal Inference Depression,Genetic Risk Scores Longitudinal Population-Based Cohort Studies Mendelian Randomization

Latest papers

Developmental Trajectories of Suicidality in Sexually Diverse and Heterosexual Adolescents: Findings From the Quebec Longitudinal Study of Child Development: Trajectoires développementales de suicidalité chez les adolescents hétérosexuels et de la diversité sexuelle : Résultats de l'Étude longitudinale sur le développement des enfants du Québec.
Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2026
Adolescent suicidal distress and adult mental health: findings from a 25-year population based cohort.
European child & adolescent psychiatry · 2026
Breastfeeding may provide on-the-job training of self-regulation: Longitudinal links with inhibitory control.
Appetite · 2026

All 49 publications

Latest funding

Paternal Age and the Risks of Adverse Perinatal, Neurodevelopmental and Epigenetic Outcomes in Children
CIHR · 2025 · Co-investigator
$1,147,500
Sleep-Disordered Breathing During Pregnancy and Long-Term Postpartum Blood Pressure Patterns
CIHR · 2025 · Co-investigator
$508,244
Mental Health of Sexual Diverse Youth
CIHR · 2023 · Co-investigator
$74,912

All 7 grants and awards

49 publications.

Developmental Trajectories of Suicidality in Sexually Diverse and Heterosexual Adolescents: Findings From the Quebec Longitudinal Study of Child Development: Trajectoires développementales de suicidalité chez les adolescents hétérosexuels et de la diversité sexuelle : Résultats de l'Étude longitudinale sur le développement des enfants du Québec.

MacNeil S, Sicotte R, Davisse-Paturet C, Chartrand E, Alexander E, Lecousy M, Girard A, Orri M, Chadi N, Ouellet-Morin I, Pullen Sansfaçon A, Iyer SN, Castellanos-Ryan N, Colman I, Juster RP, Geoffroy MC

Canadian journal of psychiatry. Revue canadienne de psychiatrie2026

DOI: 10.1177/07067437261442420 PMID: 41983935

Adolescent suicidal distress and adult mental health: findings from a 25-year population based cohort.

Civita A, Colman I, Orri M, Chartrand E, Dorais M, Spodenkiewicz M, Martinez P, Castellanos-Ryan N, Ouellet-Morin I, Côté SM, Thombs BD, Geoffroy MC

European child & adolescent psychiatry2026

DOI: 10.1007/s00787-026-03183-4 PMID: 42747516

Breastfeeding may provide on-the-job training of self-regulation: Longitudinal links with inhibitory control.

Jacques S, Parent S, Castellanos-Ryan N, Séguin JR, Zelazo PD

Appetite2026

DOI: 10.1016/j.appet.2026.108568 PMID: 42044696

Associations of sensory processing sensitivity with cannabis motives and consumption in young adults.

Rioux C, Childers-Rockey ZA, Hill A, Freeman CL, Chiramel J, Jamison WJ, Séguin JR, Webb JR, Parent S, Castellanos-Ryan N

Addictive behaviors2026Senior author

DOI: 10.1016/j.addbeh.2026.108833 PMID: 42632332

Reimagining the Biopsychosocial Model: Transdiagnostic Factors to Precision Psychiatry.

Nikolic M, Caswell CB, Prada NP, Iqbal M, Cox SML, Jaworska N, Castellanos-Ryan N, Vitaro F, Brendgen M, Parent S, Boivin M, Côté S, Tremblay RE, Séguin JR, Leyton M

Biological psychiatry global open science2026

DOI: 10.1016/j.bpsgos.2026.100734 PMID: 42293407

Prenatal Maternal Stress and Weak Handedness in Early Childhood: The Iowa Flood Study.

Hamaoui J, Zhang H, King S, Castellanos-Ryan N

Developmental psychobiology2026Senior author

DOI: 10.1002/dev.70143 PMID: 41844272

Morning cortisol levels and quality of social interactions across the transition to school predict the development of children's anxious and depressive symptoms in first grade.

Leblond M, Parent S, Castellanos-Ryan N, Lupien SJ, Herba CM, Fraser WD, Séguin JR

Psychoneuroendocrinology2026

DOI: 10.1016/j.psyneuen.2025.107721 PMID: 41418724

Sexual diversity, adolescent mental health, and adult cannabis use: Longitudinal associations through cannabis use motives.

London-Nadeau K, Pocuca N, Rioux C, Chadi N, Côté SM, Fallu JS, Geoffroy MC, Huynh C, Juster RP, Séguin JR, Castellanos-Ryan N

Addictive behaviors2026Senior author

DOI: 10.1016/j.addbeh.2025.108530 PMID: 41175609

Development of Substance Use Problems: The Role of Adolescent Cannabis Age of Onset, Frequency of Use and Childhood Risk Factors.

Hamaoui J, Acland E, Vitaro F, Fallu JS, Parent S, Simard C, Boivin M, Côté S, Geoffroy MC, Séguin JR, Castellanos-Ryan N

Research on child and adolescent psychopathology2026Senior author

DOI: 10.1007/s10802-025-01404-z PMID: 41483051

Bidirectional Associations Between Civic Engagement, Depressive Symptoms, and Suicidality in Youth: A Population-Based Study.

Sciola A, Acland E, Philippe FL, Loose T, Orri M, Vergunst F, Ouellet-Morin I, Castellanos-Ryan N, Girard A, Talwar V, Côté S, Geoffroy MC

Journal of adolescence2025

DOI: 10.1002/jad.70029 PMID: 40818106

Write to this professor

A short, specific email works best. This draft uses one of their recent papers; replace the parts in brackets with your own details before sending.

Applying for

Paper to mentionMention their CIHR grant from 2021

Subject: Prospective PhD student: Adolescents And Youths Dear Professor Castellanos Ryan, My name is [your name], and I am a [your current degree or role] at [your institution]. I am applying for a PhD position starting in [term and year]. I read your paper "Developmental Trajectories of Suicidality in Sexually Diverse and Heterosexual Adolescents: Findings From the Quebec Longitudinal Study of Child Development: Trajectoires développementales de suicidalité chez les adolescents hétérosexuels et de la diversité sexuelle : Résultats de l'Étude longitudinale sur le développement des enfants du Québec." (2026), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] I also saw your CIHR-funded project "Understanding the role of adolescent cannabis use in the pathways to depression, anxiety, and suicidality: a genetically informed multi-cohort study" (2021), and I would be glad to contribute to work in that direction. Are you accepting new PhD students for [term and year]? I have attached my CV and transcripts, and I would be glad to talk at a time that suits you. Thank you for your time. Kind regards, [your name]

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Natalie Castellanos Ryan

Research

Latest papers

Latest funding

Adolescent suicidal distress and adult mental health: findings from a 25-year population based cohort.

Breastfeeding may provide on-the-job training of self-regulation: Longitudinal links with inhibitory control.

Associations of sensory processing sensitivity with cannabis motives and consumption in young adults.

Reimagining the Biopsychosocial Model: Transdiagnostic Factors to Precision Psychiatry.

Prenatal Maternal Stress and Weak Handedness in Early Childhood: The Iowa Flood Study.

Morning cortisol levels and quality of social interactions across the transition to school predict the development of children's anxious and depressive symptoms in first grade.

Sexual diversity, adolescent mental health, and adult cannabis use: Longitudinal associations through cannabis use motives.

Development of Substance Use Problems: The Role of Adolescent Cannabis Age of Onset, Frequency of Use and Childhood Risk Factors.

Bidirectional Associations Between Civic Engagement, Depressive Symptoms, and Suicidality in Youth: A Population-Based Study.

Paternal Age and the Risks of Adverse Perinatal, Neurodevelopmental and Epigenetic Outcomes in Children

Sleep-Disordered Breathing During Pregnancy and Long-Term Postpartum Blood Pressure Patterns

Mental Health of Sexual Diverse Youth

Applying attachment theory to perinatal mental health problems and their links with early postpartum parental functioning: A trans-diagnostic perspective using perinatal longitudinal cohorts.

A comprehensive analysis of the associations of youth cannabis use with physical health, mental health, and socioeconomic outcomes over four decades of life: a population-based study of 3 longitudinal cohorts

Understanding the role of adolescent cannabis use in the pathways to depression, anxiety, and suicidality: a genetically informed multi-cohort study

Prospective PET Study of High-Risk Youth

Frequent collaborators

Natalie Castellanos Ryan

Sophie Parent

Michel Boivin

Marie-Claude Geoffroy

Frank Vitaro

Massimiliano Orri

Massimiliano Orri

Marco Leyton

Marco Leyton

Natalia Jaworska

Isabelle Ouellet-Morin

Isabelle Ouellet-Morin

Isabelle Ouellet-Morin

Nicholas Chadi

Alain Dagher

Gustavo Turecki

Gina Muckle

Ian Colman

Vincent Paquin

Tuong-Vi Nguyen

Richard Tremblay

Patricia Conrod

Tina Montreuil

Kira London-Nadeau

Jean-Philippe Gouin

Zdenka Pausova

Rachel Langevin

Linda Booij

Tomas Paus

Michel Boivin

Mark Lathrop

Jacquetta Trasler

Jean-Philippe Gouin

Michel Boivin