Study: NCT05826964

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: mTOR inhibitor + SERD
Description: Participants will receive standard of care mTOR inhibitor therapy (Everolimus) in combination with SERD therapy (Fulvestrant), in Step 2 Arm 2 and Step 3. mTOR inhibitor + SERD therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: mTOR inhibitor + SERD
Description: Participants will receive standard of care mTOR inhibitor therapy (Everolimus) in combination with SERD therapy (Fulvestrant), in Step 2 Arm 2 and Step 3. mTOR inhibitor + SERD therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: mTOR inhibitor + Selective estrogen receptor modulator
Description: Participants will receive standard of care mTOR inhibitor therapy (Everolimus) in combination with selective estrogen receptor modulator therapy (Tamoxifen) in Step 2 Arm 2 and Step 3. mTOR inhibitor + Selective estrogen receptor modulator therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: mTOR inhibitor + Selective estrogen receptor modulator
Description: Participants will receive standard of care mTOR inhibitor therapy (Everolimus) in combination with selective estrogen receptor modulator therapy (Tamoxifen) in Step 2 Arm 2 and Step 3. mTOR inhibitor + Selective estrogen receptor modulator therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: PI3K inhibitor + SERD
Description: Participants will receive standard of care one PI3K inhibitor therapy (Alpelisib), in combination with SERD therapy (Fulvestrant) in Step 2 Arm 2 and Step 3. PI3K inhibitor + SERD therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: PI3K inhibitor + SERD
Description: Participants will receive standard of care one PI3K inhibitor therapy (Alpelisib), in combination with SERD therapy (Fulvestrant) in Step 2 Arm 2 and Step 3. PI3K inhibitor + SERD therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: PI3K inhibitor + AI
Description: Participants will receive standard of care a PI3K inhibitor therapy (Alpelisib), in combination with an AI therapy (Letrozole) in Step 2 Arm 2 and Step 3. PI3K inhibitor + AI therapy administered as one of the available options for early switch from SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: PI3K inhibitor + AI
Description: Participants will receive standard of care a PI3K inhibitor therapy (Alpelisib), in combination with an AI therapy (Letrozole) in Step 2 Arm 2 and Step 3. PI3K inhibitor + AI therapy administered as one of the available options for early switch from SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Chemotherapy
Description: Chemotherapy administered standard of care as an alternative therapy in Step 2 Arm 2 and Step 3.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Chemotherapy
Description: Chemotherapy administered standard of care as an alternative therapy in Step 2 Arm 2 and Step 3.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Oral SERD
Description: Participants will receive standard of care oral SERD therapy (Elacestrant) in Step 2 Arm 2 and Step 3. Oral SERD therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Oral SERD
Description: Participants will receive standard of care oral SERD therapy (Elacestrant) in Step 2 Arm 2 and Step 3. Oral SERD therapy administered as one of the available options for early switch from AI+CDK4/6i or SERD+CDk4/6i therapy in administered in Step 1.