Nabil Georges Seidah
Biochimie neuroendocrinienne
- Professeur/chercheur titulaire
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Faculté de médecine - Département de médecine
- Professeur accrédité
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Faculté de médecine - Département de biochimie et médecine moléculaire
Media
Profile
Research expertise
Secretory proprotein convertases
We are interested in the elucidation at the molecular, cellular and in vivo levels of the mechanisms of the biosynthetic machinery and its components that are critical for the intracellular and extracellular processing and maturation of secretory proteins, prohormones and zymogens in general. Such proteolytic processing resulting in activation or inactivation of proteins, mostly occurs at the C-terminus of either single or paired basic amino acids but also at non basic residues. The 9 proprotein convertases known that we recently cloned and/or extensively characterized are: PC1, PC2, Furin, PC4, PACE4, PC5, PC7 as well as SKI-1 and PCSK9. We are elucidating the implication of these convertases in disease states and pathologies such as cancer, neurodegenerative diseases, viral infections, and dyslipidemia such as atherosclerosis and hyperholesterolemia both in human and in animal models. Thus, we have shown that the convertases SKI-1 and PCSK9 play major roles in the metabolism and/or synthesis of cholesterol and fatty acids. The development of knockout and transgenic mice with loss or gain of function of some convertases allowed us to better define their in vivo functions in normal and disease states. We have recently identified specific ways to inhibit these enzymes leading the way to clinical applications in pathologies, especially for PCSK9 in the treatment of hypercholesterolemia.Awards and recognitions
- Prix Wilder-Penfield 2011 - Gouvernement du Québec
- Société royale du Canada : Les Académies des arts, des lettres et des sciences du Canada 1992 - Société royale du Canada
- Médaille McLaughlin 2001 - Société royale du Canada
- Grand Prix scientifique 2018 de la Fondation Lefoulon-Delalande
- Conférencier émérite en sciences cardiovasculaires des IRSC (2016)
- Récipiendaire, Anne and Neil McArthur Research Award (2015)
- Prix Jacques Genest (2014), Société canadienne d’endocrinologie et de métabolisme
- Récipiendaire, Simon Pierre-Noël Memorial Lecture in Lipid Research (2013)
- Médaille du jubilé de diamant de la reine Élizabeth II (2013), Gouverneur général du Canada
- Prix Jean-Davignon d’excellence en recherche cardiovasculaire et métabolique (2009), Pfizer
- Chaire de recherche du Canada de niveau 1 en protéolyse des précurseurs (2003-2024)
- Prix Léo-Pariseau (2001), ACFAS
- Membre, Ordre du Canada (1999)
- Médaille d’honneur, PMAC Health Research Foundation (1999)
- Officier, Ordre national du Québec (1997)
- Récipiendaire, MRC Distinguished Scientist Award (1995)
- Prix de distinction Manning (1994)
- Prix Marcel Piché (1983), IRCM
- Récipiendaire, The Clarke Institute of Psychiatry Award, Toronto (1977)
education
- 1988 — Année sabbatique — — Laboratoire du Dr François Rougeon, Institut Pasteur
- 1974 — Stage postdoctoral (1973-1974) — — Université de Montréal
- 1973 — Ph. D — Chimie — Georgetown University
Affiliations and responsabilities
Research affiliations
Research units
Membre
Affiliated institutions
- Institut de recherches cliniques de Montréal (IRCM)
Teaching and supervision
Student supervision
Theses and dissertation supervision (Papyrus Institutional Repository)
The implication of GPP130 shedding by PC7 and Furin in lung cancer progression
Cycle : Master's
Grade : M. Sc.
The multifaceted proprotein convertases PC7 and furin : identification of new substrates and physiological relevance
Cycle : Doctoral
Grade : Ph. D.
PC7 : une protéase sécrétoire énigmatique ayant une fonction de sheddase et un ciblage cellulaire unique
Cycle : Doctoral
Grade : Ph. D.
Prevention of Cardiometabolic Disease in Familial Hypercholesterolemia
Cycle : Doctoral
Grade : Ph. D.
Étude de la Structure-Fonction du Prosegment et du domaine CHRD de la PCSK9 humaine
Cycle : Doctoral
Grade : Ph. D.
Proprotein convertase subtilisin/kexin type 9 in human disease
Cycle : Master's
Grade : M. Sc.
Dégradation des membres de la famille du LDLR par la convertase PCSK9 : troisième locus de l'hypercholestérolémie familiale
Cycle : Doctoral
Grade : Ph. D.
La proprotéine convertase PCSK9 : est-ce une protéase en trans ?
Cycle : Master's
Grade : M. Sc.
Implication de la convertase NARC-1 / PCSK9 au cours de la différenciation neuroectodermale
Cycle : Master's
Grade : M. Sc.
L'implication des convertases de pro-protéines dans la maturation de nouveaux substrats membranaires aux motifs de clivage atypiques
Cycle : Doctoral
Grade : Ph. D.
Inhibition cellulaire de la proprotéine convertase 1 et activité des proprotéines convertases dans le réticulum endoplasmique
Cycle : Master's
Grade : M. Sc.
Clonage, biosynthèse et caractérisation in vitro de l'activité enzymatique de ski-1 : une nouvelle protéase à serine de type subtilisine
Cycle : Master's
Grade : M. Sc.
Caractérisation et inhibition de l'endoprotéolyse de la sous-unité alpha 4 des intégrines : le rôle des proprotéines convertases
Cycle : Master's
Grade : M. Sc.
Étude de la maturation du mpro[beta]NGF par mutagénèse dirigée
Cycle : Master's
Grade : M. Sc.
Clonage de la pro-protéine convertase PC5 et étude du rôle des motifs structuraux conservés de PC1 et de PC2 dans l'activation et l'adressage de ces convertases
Cycle : Doctoral
Grade : Ph. D.
Structure du gène de la plasma kallikréine de rat
Cycle : Master's
Grade : M. Sc.
Purification de la plasma-kallikreine, développement de tests radio-immunologiques, expression et routage dans les cellules AtT-20
Cycle : Master's
Grade : M. Sc.
Other educational activities
- Professeur associé, Département de médecine (Division de lamédecine expérimentale), Université McGill
Projects
Research projects
The unique and complementary functions of PCSK7 and PCSK9 in cardiometabolic health and disease
Deciphering the role of the ASGR1/2 pathway in cardiometabolic disease
The proprotein convertases and their partners in health and disease
The Proprotein Convertases and their Relationship to Health and Disease
Canadian HIV-Ageing Multidisplinary Programmatic Strategy (CHAMPS) in NeuroHIV
Rescuing beta-lactam antibiotic/beta-lactamase inhibitor combinations from resistance against multidrug-resistant Gram-negative pathogens
Canadian HIV-Ageing Multidisplinary Programmatic Strategy (CHAMPS) in NeuroHIV
PCSK9:anticorps simple chaîne et maladies cardiovasculaires
The sex/tissue-specific regulation of the LDLR in absence of PCSK9 activity and its clinical relevance
THE FUNCTION AND REGULATION OF PCSK9: A NOVEL MODULATOR OF LDLR ACTIVITY
The Proprotein Convertases and their Relationship to Health and Disease
THE PROPOTEIN CONVERTASES AND THEIR RELATIONSHIP TO HEALTH AND DISEASE
TOWARDS A TRANSFORMATIVE UNDERSTANDING OF HAND
VALIDATION OF PCSK9 SINGLE DOMAIN ANTIBODIES IN CHOLESTEROL REGULATION IN HUMANIZED MICE
Microfluidic platforms coupled to mass spectrometry for the quantitative analysis of circulating convertase and substrates
PCSK9 : FUNCTIONS AND MECHANISMS OF ACTION IN LIVER AND ADIPOCYTES
HOW DOES SUBSTRATE CLEAVAGE BY THE PROPROTEIN CONVERTASES IMPACT ON PHYSIOLOGY AND PATHOLOGY
THE ROLES OF PCSK9 AND SKI-1 IN HEPATITIS C INFECTION
Outreach
Highlights
Mise en valeur d’une recherche
Le secret des convertases est percé
Publications and presentations
Publications
Publications choisies
- Seidah N.G., Benjannet S, Wickham L, Marcinkiewicz J, Bélanger-Jasmin S, Stifani S, Basak A, Prat A, and Chrétien M: The secretory proprotein convertase neural apoptosis-regulated convertase 1 (NARC-1): Liver regeneration and neuronal differentiation. Proc Natl Acad Sci U S A., 100: 928-933, 2003
- Benjannet S., Rhainds D., Essalmani R., Mayne J., Wickham L., Jin W., Asselin M.-C., Hamelin J., Varret M., Allard D., Trillard M., Abifadel M., Tebon A., Attie A.D., Rader D.J., Boileau C., Brissette L, Chrétien M., Prat A. and Seidah N.G.: NARC-1/PCSK9 and its natural mutants: zymogen cleavage and effects on the LDLR and LDL-cholesterol. J Biol Chem., 279: 48865-48875, 2004
- Pasquato A., Pullikotil P., Asselin M-C., Vacatello M., Paolillo L., Ghezzo , Basso F.,Bello C., Dettin M., Seidah N.G. The Proprotein convertase SKI-1/S1P: in vitro analysis of lassa virus glycoprotein-derived substrates and ex vivo validation of irreversible peptide inhibitors J Biol Chem, 281: 23471-23481, 2006
- Pullikotil P, Benjannet S, Mayne J, Seidah N.G. The proprotein convertase SKI-1/S1P: Alternate translation and subcellular localization. J Biol Chem., 282: 27402-27413, 2007
- Seidah N.G. and Prat A. The proprotein convertases are potential targets in the treatment of dyslipidemia. J Mol Med., 85: 685-696, 2007
- Nassoury N., Blasiole D., Oler T. A., Benjannet S., Hamelin J., Attie A.D., Prat A., and Seidah N.G. The cellular trafficking of the secretory proprotein convertase PCSK9 and its dependence on the LDLR. Traffic, 6: 718-732, 2007
- Essalmani R., Zaid A., Marcinkiewicz J., Chamberland A., Pasquato A., Seidah N. G. and Prat A..In vivo functions of the proprotein convertase PC5/6 during mouse development: Gdf11 is a major substrate. Proc Natl Acad Sci U S A. 105:5750-5755, 2008
- Zaid A., Roubtsova A., Essalmani R., Marcinkiewicz E., Chamberland A., Hamelin J., Tremblay M., Jacques H., Jin W., Davignon J., Seidah N.G. and Prat A.: PCSK9: hepatocyte-specific LDL receptor degradation and critical role in liver regeneration. Hepatology, 48: 646-54, 2008
- Mayer G., Hamelin J., Asselin M.-C., Pasquato A., Marcinkiewicz E., Tang M., Tabibzadeh S. and Seidah N.G. The regulated cell-surface zymogen activation of the proprotein convertase PC5A directs the processing of its secretory substrates, J. Biol Chem. 283:2373-84, 2008
- Poirier S., Mayer G, Benjannet S., Bergeron E., Marcinkiewicz J., Nassoury N., Mayer H., Nimpf J., Prat A. and Seidah N.G. The Proprotein Convertase PCSK9 Induces the degradation of LDLR and its closest family members VLDLR and apoER2. J Biol Chem. 283:2363-72, 2008
Disciplines
- Neurosciences
- Biochemistry
- Endocrinology
- Molecular Biology
- Clinical Sciences
- Pharmacology
Areas of expertise
- Enzymes and Proteins
- Cell
- Organic Molecules and Biomolecules
- Cellular Division
- Molecular Genetics
- Proteomics
- Functional and Structural Proteomics
- Neuroendocrine Diseases
- Nervous System Development
- Cardiovascular Diseases
- COVID-19
- COVID19