Events Calendar

Environmental and Occupational Health Sciences Journal Club

This is a past event.

EOH student Zachary Clemens will present the article:

Prdm16-mediated H3K9 methylation controls fibro-adipogenic progenitors identity during skeletal muscle repair

by Biferali, B., Bianconi, V., Perez, D. F., Kronawitter, S. P., Marullo, F., Maggio, R., Santini, T., Polverino, F., Biagioni, S., Summa, V., Toniatti, C., Pasini, D., Stricker, S., Di Fabio, R., Chiacchiera, F., Peruzzi, G., & Mozzetta, C.

Abstract: H3K9 methylation maintains cell identity orchestrating stable silencing and anchoring of alternate fate genes within the heterochromatic compartment underneath the nuclear lamina (NL). However, how cell type-specific genomic regions are specifically targeted to the NL is still elusive. Using fibro-adipogenic progenitors (FAPs) as a model, we identified Prdm16 as a nuclear envelope protein that anchors H3K9-methylated chromatin in a cell-specific manner. We show that Prdm16 mediates FAP developmental capacities by orchestrating lamina-associated domain organization and heterochromatin sequestration at the nuclear periphery. We found that Prdm16 localizes at the NL where it cooperates with the H3K9 methyltransferases G9a/GLP to mediate tethering and silencing of myogenic genes, thus repressing an alternative myogenic fate in FAPs. Genetic and pharmacological disruption of this repressive pathway confers to FAP myogenic competence, preventing fibro-adipogenic degeneration of dystrophic muscles. In summary, we reveal a druggable mechanism of heterochromatin perinuclear sequestration exploitable to reprogram FAPs in vivo.

PLEASE SUPPORT OUR STUDENT PRESENTERS

Organized by Dr. Nicholas Fitz of the Department of Environmental and Occupational Health, this weekly course is designed to expose EOH students to the newest and most exciting research in a diverse set of topics related to toxicology.  Guests are welcome.  If a Zoom link is needed, please email klt75@pitt.edu.

Thursday, January 27 at 11:00 a.m.

Public Health, 4140
130 Desoto Street, Pittsburgh, 15261

Environmental and Occupational Health Sciences Journal Club

EOH student Zachary Clemens will present the article:

Prdm16-mediated H3K9 methylation controls fibro-adipogenic progenitors identity during skeletal muscle repair

by Biferali, B., Bianconi, V., Perez, D. F., Kronawitter, S. P., Marullo, F., Maggio, R., Santini, T., Polverino, F., Biagioni, S., Summa, V., Toniatti, C., Pasini, D., Stricker, S., Di Fabio, R., Chiacchiera, F., Peruzzi, G., & Mozzetta, C.

Abstract: H3K9 methylation maintains cell identity orchestrating stable silencing and anchoring of alternate fate genes within the heterochromatic compartment underneath the nuclear lamina (NL). However, how cell type-specific genomic regions are specifically targeted to the NL is still elusive. Using fibro-adipogenic progenitors (FAPs) as a model, we identified Prdm16 as a nuclear envelope protein that anchors H3K9-methylated chromatin in a cell-specific manner. We show that Prdm16 mediates FAP developmental capacities by orchestrating lamina-associated domain organization and heterochromatin sequestration at the nuclear periphery. We found that Prdm16 localizes at the NL where it cooperates with the H3K9 methyltransferases G9a/GLP to mediate tethering and silencing of myogenic genes, thus repressing an alternative myogenic fate in FAPs. Genetic and pharmacological disruption of this repressive pathway confers to FAP myogenic competence, preventing fibro-adipogenic degeneration of dystrophic muscles. In summary, we reveal a druggable mechanism of heterochromatin perinuclear sequestration exploitable to reprogram FAPs in vivo.

PLEASE SUPPORT OUR STUDENT PRESENTERS

Organized by Dr. Nicholas Fitz of the Department of Environmental and Occupational Health, this weekly course is designed to expose EOH students to the newest and most exciting research in a diverse set of topics related to toxicology.  Guests are welcome.  If a Zoom link is needed, please email klt75@pitt.edu.

Thursday, January 27 at 11:00 a.m.

Public Health, 4140
130 Desoto Street, Pittsburgh, 15261

Event Type

Virtual

Topic

Research

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