Patrick J. Rochette is a regular researcher at the Research Centre of the CHU of Quebec – Laval University, in the area of ​​regenerative medicine, of which he is the assistant director. He is also Associate Professor and Assistant Director of Basic Research in the Department of Ophthalmology and ENT – head and neck surgery of the Faculty of Medicine at Laval University. He completed his graduate studies (MSc / PhD) in the laboratory of Dr. Regen Drouin (U. Laval), where he studied the induction and repair of UV-induced damage. He pursued his training with 2 postdoctoral fellowships at Yale University, including one in the laboratory of Dr. Douglas Brash, a pioneer in the study of UV-induced mutations in cutaneous cancer. His second fellowship took place in Dr. Yilun Liu ‘s laboratory, where he worked on the RecQ4 helicase in the initiation of DNA replication. He joined Laval University in 2009 and started a laboratory where he specialized in photobiology and, more precisely, on the consequences of cell exposure to low-wavelength light rays (ultraviolet and blue). In humans, only the skin and eyes are exposed to these rays. Thus, Dr. Rochette’s laboratory is interested in two fields of study, ocular photobiology and cutaneous photobiology.

Cutaneous photobiology

At the cutaneous level, skin cells are used as a model to study the mechanisms of protection against the genotoxicity of sunlight. These mechanisms include the induction of mutagenic damage, its repair, and induced cell death as a protective mechanism. In this part of the laboratory, the projects pursued are, among others, the following:

– Influence of the dermis on the efficacy of repair techniques of UV-induced mutagenic damage to the epidermis;

– Effect of chronic UVB irradiation on the cellular genotoxic stress response;

– Necroptosis as a new UV-induced, programmed cell death pathway;

– Involvement of UVA, alone or in synergy with polycyclic aromatic hydrocarbons (PAH) contained in cigarette smoke in cutaneous photoaging.

 Ocular photobiology

At the ocular level, Dr. Rochette’s research is mostly applied. It aims to understand the involvement of UV and blue light in various ocular pathologies. As UV light does not reach the adult retina, blue light is the most energetic light it is exposed to. In this part of the laboratory, the projects pursued are, among others, the following:

– UVA toxicity in the cornea, involvement of UV-Induced oxidation;

– Involvement of mitochondrial dysfunction in Fuchs corneal endothelial dystrophy;

– Involvement of blue light, alone or in synergy with lipofuscin and / or PAHs in age-related macular degeneration (AMD).

Hôpital Saint-Sacrement
1050, chemin Sainte-Foy
Québec, Québec
Canada G1S 4L8
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Theriault M, Gendron SP, Brunette I, Rochette PJ, Proulx S

Function-Related Protein Expression in Fuchs Endothelial Corneal Dystrophy Cells and Tissue Models.

Journal Article

Am J Pathol, 188 (7), pp. 1703-1712, 2018, ISSN: 0002-9440.

Abstract | Links:

Drigeard Desgarnier MC, Fournier F, Droit A, Rochette PJ

Influence of a pre-stimulation with chronic low-dose UVB on stress response mechanisms in human skin fibroblasts.

Journal Article

PLoS ONE, 12 (3), pp. e0173740, 2017.

Abstract | Links:

Zinflou C, Rochette PJ

Ultraviolet A-induced oxidation in cornea: Characterization of the early oxidation-related events.

Journal Article

Free Radic Biol Med, 108 , pp. 118-128, 2017, ISSN: 0891-5849.

Abstract | Links:

Gendron SP, Theriault M, Proulx S, Brunette I, Rochette PJ

Restoration of Mitochondrial Integrity, Telomere Length, and Sensitivity to Oxidation by In Vitro Culture of Fuchs' Endothelial Corneal Dystrophy Cells.

Journal Article

Invest Ophthalmol Vis Sci, 57 (14), pp. 5926-5934, 2016, ISSN: 0146-0404.

Abstract | Links:

Drigeard Desgarnier MC, Zinflou C, Mallet JD, Gendron SP, Methot SJ, Rochette PJ

Telomere Length Measurement in Different Ocular Structures: A Potential Implication in Corneal Endothelium Pathogenesis.

Journal Article

Invest Ophthalmol Vis Sci, 57 (13), pp. 5547-5555, 2016, ISSN: 0146-0404.

Abstract | Links:

Ennour-Idrissi K, Tetu B, Maunsell E, Poirier B, Montoni A, Rochette PJ, Diorio C

Association of Telomere Length with Breast Cancer Prognostic Factors.

Journal Article

PLoS ONE, 11 (8), pp. e0161903, 2016.

Abstract | Links:

Mallet JD, Dorr MM, Drigeard Desgarnier MC, Bastien N, Gendron SP, Rochette PJ

Faster DNA Repair of Ultraviolet-Induced Cyclobutane Pyrimidine Dimers and Lower Sensitivity to Apoptosis in Human Corneal Epithelial Cells than in Epidermal Keratinocytes.

Journal Article

PLoS ONE, 11 (9), pp. e0162212, 2016.

Abstract | Links:

Gendron SP, Rochette PJ

Modifications in stromal extracellular matrix of aged corneas can be induced by ultraviolet A irradiation.

Journal Article

Aging Cell, 14 (3), pp. 433-42, 2015, ISSN: 1474-9718.

Abstract | Links:

Bisson F, Paquet C, Bourget JM, Zaniolo K, Rochette PJ, Landreville S, Damour O, Boudreau F, Auger FA, Guerin SL, Germain L

Contribution of Sp1 to Telomerase Expression and Activity in Skin Keratinocytes Cultured With a Feeder Layer.

Journal Article

J Cell Physiol, 230 (2), pp. 308-17, 2015, ISSN: 0021-9541.

Abstract | Links:

Mallet JD, Gendron SP, Drigeard Desgarnier MC, Rochette PJ

Implication of ultraviolet light in the etiology of uveal melanoma: A review.

Journal Article

Photochem Photobiol, 90 (1), pp. 15-21, 2014, ISSN: 0031-8655.

Abstract | Links:

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Active projects

  • Centre de recherche du CHU de Québec - Université Laval, Subvention, Centre hospitalier universitaire de Québec - Université Laval, Centres de recherche affiliés, from 2017-01-01 to 2099-12-31
  • Centre de recherche en organogenèse expérimentale, Subvention, Institutionnel - BDR, BDR - Centres de recherche reconnus, from 2011-05-01 to 2020-09-22
  • Fuchs endothelial corneal dystrophy and corneal transplantation: The traditional paradigm revisited, Subvention, Instituts de recherche en santé du Canada, Subvention Projet, from 2019-10-01 to 2024-09-30
  • Réponse cellulaire au stress génotoxique induit par l'irradiation chronique aux rayons ultraviolets., Subvention, Conseil de recherches en sciences naturelles et génie Canada, Subventions à la découverte SD (individuelles et d'équipe), from 2016-04-01 to 2021-03-31

Recently finished projects

  • Toxicité des rayons solaires dans l'oeil humain., Subvention, Fonds de recherche du Québec - Santé, Chercheur-boursier Juniors 1 et 2, Seniors, from 2016-07-01 to 2020-06-30
Data provided by the Université Laval research projects registery