Jantina Toxopeus, St. Francis Xavier University

Research

Cell biology Cold acclimation Confocal microscopy Cryoprotectants Freeze tolerance Insect physiology Molecular biology Plasticity

Latest papers

Fall-like acclimation alters mitochondrial function and substrate use in freeze-tolerant crickets.
Journal of thermal biology · 2025 · senior author
Tissue- and temperature-dependent expression, enzyme activity, and RNAi knockdown of Catalase in a freeze-tolerant insect.
Journal of insect physiology · 2025 · senior author
Freeze-tolerant crickets fortify their actin cytoskeleton in fat body tissue.
The Journal of experimental biology · 2025 · senior author

All 6 publications

Latest funding

The cellular mechanisms of insect physiological plasticity and freeze tolerance
NSERC · 2021 · Principal investigator
$132,000
The cellular mechanisms of insect physiological plasticity and freeze tolerance
NSERC · 2021 · Principal investigator
$12,500

All 2 grants and awards

6 publications.

01

Fall-like acclimation alters mitochondrial function and substrate use in freeze-tolerant crickets.

Pichaud N, Menail HA, Ojukwu KC, Morin P, Toxopeus J

Journal of thermal biology2025Senior author

DOI: 10.1016/j.jtherbio.2025.104253 PMID: 40876128

02

Tissue- and temperature-dependent expression, enzyme activity, and RNAi knockdown of Catalase in a freeze-tolerant insect.

Rokosh SE, Adams VE, Walter R, Kaiser GE, Gough AL, Toxopeus J

Journal of insect physiology2025Senior author

DOI: 10.1016/j.jinsphys.2025.104809 PMID: 40222683

03

Freeze-tolerant crickets fortify their actin cytoskeleton in fat body tissue.

van Oirschot ML, Toxopeus J

The Journal of experimental biology2025Senior author

DOI: 10.1242/jeb.249947 PMID: 40084588

04

HSP70 is upregulated after heat but not freezing stress in the freeze-tolerant cricket Gryllus veletis.

Adams VE, van Oirschot ML, Toxopeus J

Comparative biochemistry and physiology. Part A, Molecular & integrative physiology2025Senior author

DOI: 10.1016/j.cbpa.2024.111791 PMID: 39657844

05

Knock down to level up: Reframing RNAi for invertebrate ecophysiology.

Lebenzon JE, Toxopeus J

Comparative biochemistry and physiology. Part A, Molecular & integrative physiology2024Senior author

DOI: 10.1016/j.cbpa.2024.111703 PMID: 39029617

06

Cold tolerance and diapause within and across trophic levels: Endoparasitic wasps and their fly host have similar phenotypes.

McIntyre T, Andaloori L, Hood GR, Feder JL, Hahn DA, Ragland GJ, Toxopeus J

Journal of insect physiology2023Senior author

DOI: 10.1016/j.jinsphys.2023.104501 PMID: 36921838

The cellular mechanisms of insect physiological plasticity and freeze tolerance

Principal investigatorNSERC2021Discovery Grants Program - Individual

Principal investigators: Toxopeus, Jantina

Keywords: insect physiology; cold acclimation; freeze tolerance; cell biology; molecular biology; cryoprotectants; rna interference; confocal microscopy; plasticity

$132,000

The cellular mechanisms of insect physiological plasticity and freeze tolerance

Principal investigatorNSERC2021Discovery Launch Supplement

Principal investigators: Toxopeus, Jantina

$12,500

From CIHR, NSERC and SSHRC funding decisions: CIHR since 2008, NSERC since 1991 and SSHRC since 1998, including their latest published competition results.

Frequent collaborators

Biology
Département de Chimie et Biochimie
Chemistry and Biochemistry

Co-authors at St. Francis Xavier University, colored by department. Thicker lines mean more shared papers; select anyone to open their profile and their own map.

Nicolas Pichaud

Département de Chimie et Biochimie

1 shared papers, latest 2025

Pier Morin

Chemistry and Biochemistry

1 shared papers, latest 2025

Write to this professor

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Applying for

Paper to mentionMention their NSERC grant from 2021

Subject: Prospective PhD student: Cell biology Dear Professor Toxopeus, 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 "Fall-like acclimation alters mitochondrial function and substrate use in freeze-tolerant crickets." (2025), 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 NSERC-funded project "The cellular mechanisms of insect physiological plasticity and freeze tolerance" (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]