Dr.  Jean Charron is an investigator at the Research Centre of the CHU of Québec-Université Laval in the Oncology axis. He is also Professor at the Department of molecular biology, medical biochemistry and pathology in the Faculty of medicine at Université Laval. His research activities focus on the functional characterization of the decision-making mechanisms of the ERK/MAPK signaling pathway in cells when exposed to developmental or environmental cues. These mechanisms are essential for embryonic development and homeostasis of every living throughout life.  Any failure of interpretation of cell signalling leads to malformations or pathologies.

Role of the ERK/MAPK pathway in lung development

The development of the respiratory tract is complex and requires several steps of morphogenesis, differentiation and maturation to form the definitive lung. The integration of signals induces by the interaction of secreted factors with their receptors or by cell-cell interactions is essential for lung formation. Dr. Charron’s laboratory examines the role of the ERK/MAPK pathway in lung development using the mouse as a model.  His team has already highlighted the role of the ERK/MAPK pathway in lung morphogenesis during bronchial branching and the formation of tracheal cartilage. These defects faithfully recapitulate the phenotypes of significant and costly human diseases, including lung hypoplasia, lung agenesis and tracheomalacia, each representing a major public health concern. These studies will play an increasingly important role in providing insights into the molecular mechanisms underlying fetal and neonatal diseases and in allowing development of novel targeted therapies.

Role of the ERK/MAPK path in the development of autoimmune diseases

The work of the team of Dr. Charron has also shown that decreased ERK/MAPK signaling in hematopoietic cells causes the abnormal production of autoantibodies directed against nuclear proteins and DNA double strand in mice. Over time, these mice develop a glomerulonephritis leading to kidney failure and severe anemia. These symptoms are similar to those of systemic lupus erythematosus (SLE), a severe auto-immune disease more frequent in women than in men. In the murine model generated in the laboratory of Dr. Charron, the females are also 5 times more likely to develop the disease than males. Work is in progress in Dr. Charron’s laboratory to identify which immune cell types are involved in the onset of the auto-immune disease and which molecular mechanisms are involved. This study will provide understanding of the molecular processes leading to the development of autoimmune diseases, and will eventually lead to new therapeutic approaches adapted to sex.

L'Hôtel-Dieu de Québec
9, rue McMahon
1784
Québec, Québec
Canada G1R 2J6
59 entries « 6 of 6 »

Charron J, Malynn BA, Robertson EJ, Goff SP, Alt FW

High-frequency disruption of the N-myc gene in embryonic stem and pre-B cell lines by homologous recombination

Journal Article

Mol Cell Biol, 10 (4), 1990.

Abstract | Links:

Charron J, Richard-Foy H, Berard DS, Hager GL, Drouin J

Independent glucocorticoid induction and repression of two contiguous responsive genes

Journal Article

Mol Cell Biol, 9 (7), 1989.

Abstract | Links:

Drouin J, Nemer M, Charron J, Gagner JP, Jeannotte L, Sun YL, Therrien M, Tremblay Y

Tissue-specific activity of the pro-opiomelanocortin (POMC) gene and repression by glucocorticoids

Journal Article

Genome, 31 (2), 1989.

Abstract | Links:

Drouin J, Charron J, Gagner JP, Jeannotte L, Nemer M, Plante RK, Wrange O

Pro-opiomelanocortin gene: a model for negative regulation of transcription by glucocorticoids

Journal Article

J Cell Biochem, 35 (4), 1987.

Abstract | Links:

Charron J, Drouin J

Glucocorticoid inhibition of transcription from episomal proopiomelanocortin gene promoter

Journal Article

Proc Natl Acad Sci U S A, 83 (23), 1986.

Abstract | Links:

Cohen EA, Charron J, Perret J, Langelier Y

Herpes simplex virus ribonucleotide reductase induced in infected BHK-21/C13 cells: biochemical evidence for the existence of two non-identical subunits, H1 and H2

Journal Article

J Gen Virol, 66 ( Pt 4) , 1985.

Abstract | Links:

Drouin J, Chamberland M, Charron J, Jeannotte L, Nemer M

Structure of the rat pro-opiomelanocortin (POMC) gene

Journal Article

FEBS Lett, 193 (1), 1985.

Abstract | Links:

Bradley WE, Dinelle C, Charron J, Langelier Y

Bromodeoxyuridine resistance in CHO cells occurs in three discrete steps

Journal Article

Somatic Cell Genet, 8 (2), 1982.

Abstract | Links:

Charron J, Langelier Y

Analysis of deoxycytidine (dC) deaminase activity in herpes simplex virus-infected or HSV TK-transformed cells: association with mycoplasma contamination but not with virus infection

Journal Article

J Gen Virol, 57 (Pt 1), 1981.

Abstract | Links:

59 entries « 6 of 6 »
Signaler des ajouts ou des modifications