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6 results on '"Kyung W Song"'

1. Figure S6 from RTK-Dependent Inducible Degradation of Mutant PI3Kα Drives GDC-0077 (Inavolisib) Efficacy

Author

Lori S. Friedman, Anwesha Dey, Donald S. Kirkpatrick, Steven T. Staben, Shiva Malek, Alan G. Olivero, Timothy P. Heffron, Laurent Salphati, Gail D. Lewis Phillips, Emile G. Plise, Jonathan Cheong, Jeffrey J. Wallin, Jane Guan, Nicholas Endres, Stephen Schmidt, Eric Stawiski, William F. Forrest, Lilian Phu, Rebecca Hong, Michelle A. Nannini, Deepak Sampath, Mark Merchant, Jason Oeh, Marc Hafner, Emily J. Hanan, Kyle A. Edgar, and Kyung W. Song

Abstract

RTK activity plays a key role in regulating p110a degradation

Published
2023
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2. Figure S1 from RTK-Dependent Inducible Degradation of Mutant PI3Kα Drives GDC-0077 (Inavolisib) Efficacy

Author

Lori S. Friedman, Anwesha Dey, Donald S. Kirkpatrick, Steven T. Staben, Shiva Malek, Alan G. Olivero, Timothy P. Heffron, Laurent Salphati, Gail D. Lewis Phillips, Emile G. Plise, Jonathan Cheong, Jeffrey J. Wallin, Jane Guan, Nicholas Endres, Stephen Schmidt, Eric Stawiski, William F. Forrest, Lilian Phu, Rebecca Hong, Michelle A. Nannini, Deepak Sampath, Mark Merchant, Jason Oeh, Marc Hafner, Emily J. Hanan, Kyle A. Edgar, and Kyung W. Song

Abstract

Taselisib and GDC-0077 have increased potency in PIK3CA-mutant cancer cells

Published
2023
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3. Data from RTK-Dependent Inducible Degradation of Mutant PI3Kα Drives GDC-0077 (Inavolisib) Efficacy

Author

Lori S. Friedman, Anwesha Dey, Donald S. Kirkpatrick, Steven T. Staben, Shiva Malek, Alan G. Olivero, Timothy P. Heffron, Laurent Salphati, Gail D. Lewis Phillips, Emile G. Plise, Jonathan Cheong, Jeffrey J. Wallin, Jane Guan, Nicholas Endres, Stephen Schmidt, Eric Stawiski, William F. Forrest, Lilian Phu, Rebecca Hong, Michelle A. Nannini, Deepak Sampath, Mark Merchant, Jason Oeh, Marc Hafner, Emily J. Hanan, Kyle A. Edgar, and Kyung W. Song

Abstract

PIK3CA is one of the most frequently mutated oncogenes; the p110a protein it encodes plays a central role in tumor cell proliferation. Small-molecule inhibitors targeting the PI3K p110a catalytic subunit have entered clinical trials, with early-phase GDC-0077 studies showing antitumor activity and a manageable safety profile in patients with PIK3CA-mutant breast cancer. However, preclinical studies have shown that PI3K pathway inhibition releases negative feedback and activates receptor tyrosine kinase signaling, reengaging the pathway and attenuating drug activity. Here we discover that GDC-0077 and taselisib more potently inhibit mutant PI3K pathway signaling and cell viability through unique HER2-dependent mutant p110a degradation. Both are more effective than other PI3K inhibitors at maintaining prolonged pathway suppression. This study establishes a new strategy for identifying inhibitors that specifically target mutant tumors by selective degradation of the mutant oncoprotein and provide a strong rationale for pursuing PI3Kα degraders in patients with HER2-positive breast cancer.Significance:The PI3K inhibitors GDC-0077 and taselisib have a unique mechanism of action; both inhibitors lead to degradation of mutant p110a protein. The inhibitors that have the ability to trigger specific degradation of mutant p110a without significant change in wild-type p110a protein may result in improved therapeutic index in PIK3CA-mutant tumors.See related commentary by Vanhaesebroeck et al., p. 20.This article is highlighted in the In This Issue feature, p. 1

Published
2023
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4. Figure S5 from RTK-Dependent Inducible Degradation of Mutant PI3Kα Drives GDC-0077 (Inavolisib) Efficacy

Author

Lori S. Friedman, Anwesha Dey, Donald S. Kirkpatrick, Steven T. Staben, Shiva Malek, Alan G. Olivero, Timothy P. Heffron, Laurent Salphati, Gail D. Lewis Phillips, Emile G. Plise, Jonathan Cheong, Jeffrey J. Wallin, Jane Guan, Nicholas Endres, Stephen Schmidt, Eric Stawiski, William F. Forrest, Lilian Phu, Rebecca Hong, Michelle A. Nannini, Deepak Sampath, Mark Merchant, Jason Oeh, Marc Hafner, Emily J. Hanan, Kyle A. Edgar, and Kyung W. Song

Abstract

Taselisib-mediated degradation of mutant p110a occurs preferentially at the plasma membrane.

Published
2023
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5. Figure S4 from RTK-Dependent Inducible Degradation of Mutant PI3Kα Drives GDC-0077 (Inavolisib) Efficacy

Author

Lori S. Friedman, Anwesha Dey, Donald S. Kirkpatrick, Steven T. Staben, Shiva Malek, Alan G. Olivero, Timothy P. Heffron, Laurent Salphati, Gail D. Lewis Phillips, Emile G. Plise, Jonathan Cheong, Jeffrey J. Wallin, Jane Guan, Nicholas Endres, Stephen Schmidt, Eric Stawiski, William F. Forrest, Lilian Phu, Rebecca Hong, Michelle A. Nannini, Deepak Sampath, Mark Merchant, Jason Oeh, Marc Hafner, Emily J. Hanan, Kyle A. Edgar, and Kyung W. Song

Abstract

Taselisib depletes mutant p110a protein through ubiquitin and proteasome mechanism in a dose and time dependent manner

Published
2023
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6. Figure S2 from RTK-Dependent Inducible Degradation of Mutant PI3Kα Drives GDC-0077 (Inavolisib) Efficacy

Author

Lori S. Friedman, Anwesha Dey, Donald S. Kirkpatrick, Steven T. Staben, Shiva Malek, Alan G. Olivero, Timothy P. Heffron, Laurent Salphati, Gail D. Lewis Phillips, Emile G. Plise, Jonathan Cheong, Jeffrey J. Wallin, Jane Guan, Nicholas Endres, Stephen Schmidt, Eric Stawiski, William F. Forrest, Lilian Phu, Rebecca Hong, Michelle A. Nannini, Deepak Sampath, Mark Merchant, Jason Oeh, Marc Hafner, Emily J. Hanan, Kyle A. Edgar, and Kyung W. Song

Abstract

Activity of GDC-0077 in combination with Palbociclib and/ or Fulvestrant

Published
2023
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