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Table 2 Summary of trials combining endocrine therapy with PI3K inhibitors in patients with metastatic hormone receptor-positive breast cancer

From: Overcoming endocrine resistance in metastatic hormone receptor-positive breast cancer

Agent

ET

Setting

Trial

Alpelisib

Fulvestrant

After progression on AI

SOLAR-1; NCT02437318

Buparlisib

Fulvestrant

After progression on AI

BELLE-2; NCT01610284

Buparlisib

Fulvestant

After progression on mTOR inhibitor

BELLE-3; NCT01633060

Pictilisib

Fulvestrant

After progression on AI

FERGI; NCT01437566

Pictilisib + Palbociclib

Fulvestrant

After progression on AI

PASTOR; NCT02599714

Gedatolisib + Palbociclib

Fulvestrant or Letrozole

3 arms:

• No prior endocrine therapy

• Progression on or after 1 line of endocrine therapy, no prior CDK inhibitor therapy

• Progression after 1 or 2 prior endocrine therapies, following prior CDK inhibitor therapy

NCT02684032

  1. ET endocrine therapy, AI aromatase inhibitor