PreOperative Endocrine Therapy for Individualised Care With Abemaciclib

Drug: Endocrine therapy

Drug: Endocrine therapy (letrozole, anastrozole, exemestane or tamoxifen)

Drug: Endocrine therapy

Drug: Endocrine therapy (letrozole, anastrozole, exemestane or tamoxifen)

Endocrine therapy

Endocrine therapy (letrozole, anastrozole, exemestane or tamoxifen)

<p>Registration Stage Inclusion Criteria:</p><p>1. Postmenopausal women defined as:</p><p>1a.
A postmenopausal state is defined as no menses for 12 months without an alternative medical cause.
A high follicle stimulating hormone (FSH) level in the postmenopausal range may be used to confirm a post-menopausal state in women not using hormonal contraception or hormonal replacement therapy.
However in the absence of 12 months of amenorrhea, a single FSH measurement is insufficient.</p><p>or</p><p>1b. Documented bilateral oophorectomy.</p><p>2. Diagnosed operable invasive breast cancer with a palpable tumour of any size or an estimated invasive tumour size &gt;&#x2F;=1.5cm
by imaging (ultrasound&#x2F;MRI&#x2F;mammogram) excluding those who are grade 1 and &#x2F;or lobular histological type on diagnostic biopsy.</p><p>3. Tumour ER positive and HER2 negative.
ER positivity is defined as &gt;&#x2F;=1% cells staining positive (or equivalent Allred Score of ER &gt;&#x2F;=3 out of 8).
HER2 negativity will be defined as per the 2018 ASCO&#x2F;CAP updated guidelines.</p><p>4. Baseline Ki67 and&#x2F;or clinical pathological factors which predict for a high (20%) 5-year risk of relapse with AI alone (see Appendix 2) 4a.
Baseline Ki67 &gt;&#x2F;=20% measured at the local site or 4b.
Presence of clinicopathologic factors that have been previously shown to predict (&gt;50% chance) patients with Ki67 &gt;&#x2F;=8% after 2 weeks&#x27; AI, defined as one or more of the following: grade 3; clinical&#x2F;radiological tumour size &gt; 5cm; PgR negative; PgR unknown AND evidence of Vascular Invasion.</p><p>5. No evidence of metastatic spread by standard assessment according to local guidelines.</p><p>6. Written informed consent to enter the registration stage of the trial and to donation of fresh tissue.</p><p>7. No medical condition or other factor likely to preclude entry to randomised stage of the study if eligible e.g.
patient would not be suitable to receive abemaciclib due to concomitant medications or medical history.</p><p>8. The patient has given written informed consent prior to any study-specific procedures and is willing and able to make herself available for the duration of the study and amenable and able to follow study schedule during treatment and follow-up and for the use of routinely collected electronic health and related records.</p><p>Registration Stage Exclusion Criteria:</p><ol><li>Men and pre&#x2F;perimenopausal women.</li><li>Grade 1 tumours</li><li>Invasive lobular carcinoma.</li><li>Concurrent use (defined as use within 4 weeks prior to diagnostic tissue sample being taken) of HRT or any other oestrogen-containing medication (including vaginal oestrogens).</li><li>Prior endocrine therapy for breast cancer or breast cancer prevention.</li><li>Evidence of metastatic disease.</li><li>Locally advanced breast cancer not amenable to surgery.</li><li>Bilateral breast cancer.</li><li>Multiple unilateral tumours with different ER&#x2F;PgR&#x2F;HER2 status, grade or type (e.g.
ductal vs lobular) i.e. anything that suggests two or more different cancers.
Multifocal disease with homogenous ER&#x2F;PgR&#x2F;HER2 status, grade and type is allowed if at least one lesion is palpable or at least 1.5cm on ultrasound; the largest lesion should be used for sample collection and CRF completion.</li><li>Previous invasive breast cancer except for ipsilateral DCIS or LCIS treated &gt;5 years previously by locoregional therapy alone or contralateral DCIS&#x2F;LCIS treated by locoregional therapy at any time.</li><li>Any invasive malignancy diagnosed within previous 5 years (other than non-melanoma skin cancer or cervical carcinoma in situ).</li><li>Any other medical condition likely to exclude the patient from subsequent randomisation stage.
(See exclusion criteria: Eligibility for Randomisation).</li></ol><p>Randomisation stage Inclusion Criteria</p><ol><li>Patient previously consented and registered for screening component of POETIC A.</li><li>Centrally confirmed Ki67 &gt;&#x2F;=8% following 2 weeks of AI.</li><li>Aromatase Inhibitor Resistant-CDK4&#x2F;6 Inhibitor Sensitive (AIR-CIS) signature has been derived in the central laboratory and confirmed to ICR-CTSU.</li><li>Patient must have undergone definitive surgery for the primary breast tumour with clear radial margins as judged by the multidisciplinary team.</li><li>Surgical staging of the axilla must have been undertaken by sentinel node biopsy, axillary sampling or dissection.</li><li>Adjuvant chemotherapy, if prescribed, must have been completed prior to randomisation and patients must have recovered (Common Terminology Criteria for Adverse Events, version 5 [CTCAEv5] Grade &lt;&#x2F;=1) from the acute effects of chemotherapy except for residual alopecia or Grade 2 peripheral neuropathy prior to randomisation.
A washout period of a minimum of 28 days from day 1 of last cycle of treatment is required.</li><li>Adjuvant radiotherapy, if prescribed, must have been completed prior to randomisation, and patients must have recovered (Grade &lt;&#x2F;=1) from the acute effects of radiotherapy.
A washout period of at least 14 days is required between end of radiotherapy and randomisation.</li><li>The patient should be randomised within 6 months of commencement of adjuvant endocrine therapy.</li><li>The patient is able to swallow oral medications.</li><li>The patient has adequate organ function for all of the following criteria defined as; ANC &gt;&#x2F;= 1.5 × 109&#x2F;L (G-CSF cannot be administered to meet this ANC eligibility criterion) Platelets &gt;&#x2F;= 100 × 109&#x2F;L Haemoglobin &gt;&#x2F;= 8g&#x2F;dL (Blood transfusions cannot be administered to meet this haemoglobin eligibility criterion) Total bilirubin &lt;&#x2F;= 1.5 × ULN (Patients with Gilbert&#x27;s syndrome with a total bilirubin ≤2.0 times ULN and direct bilirubin within normal limits are permitted.)
ALT and AST &lt;&#x2F;= 3 × ULN</li><li>The patient intends to take adjuvant endocrine therapy for at least 5 years.</li><li>The patient has given written informed consent prior to any study-specific procedures (for the randomised intervention stage), willing to donate tissue from diagnostic biopsy, and is willing and able to make herself available for the duration of the study and to follow study schedule during treatment and follow-up and for the use of routinely collected electronic health and related records.</li></ol><p>Randomisation stage Exclusion Criteria</p><ol><li>Patient has received prior CDK4&#x2F;6 inhibitor.</li><li>Any patient with a history of VTE (for example, DVT of the leg or arm and&#x2F;or PE) will be excluded.
Patients with a history of venous catheter occlusion by thrombus that did NOT surround the catheter, and the lumen could be made patent by appropriate measures (for example, saline or thrombolytic agent), are not excluded.</li><li>The patient has a serious&#x2F;or uncontrolled pre-existing medical condition(s) that, in the judgment of the investigator, would preclude participation in this study (such as severe renal impairment, [for example, estimated creatinine clearance &lt;30 mL&#x2F;min], interstitial lung disease, severe dyspnoea at rest or requiring oxygen therapy, history of major surgical resection involving the stomach or small bowel, or pre-existing Crohn&#x27;s disease or ulcerative colitis or a pre-existing chronic condition resulting in baseline Grade 2 diarrhoea).</li><li>The patient has a personal history of any of the following conditions: syncope of cardiovascular aetiology, ventricular arrhythmia of pathological origin (including, but not limited to, ventricular tachycardia and ventricular fibrillation), or sudden cardiac arrest.
Exception: patients with controlled atrial fibrillation diagnosed more than 30 days prior to randomisation are eligible.</li><li>The patient has active systemic bacterial infections (requiring IV antibiotics at time of initiating study treatment), systemic fungal infection or detectable viral infection (such as known HIV positivity or with known active hepatitis B or C (e.g.
hepatitis B surface antigen positive).
Screening is not required for enrolment.</li></ol>

<p>Registration Stage Inclusion Criteria:</p><ol><li>Women determined to be postmenopausal according to established local criteria.</li><li>Diagnosed operable invasive breast cancer with a clinical&#x2F;radiological tumour size ≥1.5cm*</li><li>Preoperative full assessment completed (including bilateral breast examination and imaging with mammogram +&#x2F;- ultrasound&#x2F;MRI as performed locally).</li><li>Tumour ER positive.
ER positivity is defined as &gt;&#x2F;=1% cells staining positive (or equivalent Allred Score of ER &gt;&#x2F;=3 out of 8).</li><li>Tumour HER2 negative or HER2 status unknown.
HER2 negativity will be defined as per the 2018 ASCO&#x2F;CAP updated guidelines.
Patients whose HER2 status is pending&#x2F;unknown at the time of registration will be allowed to register to the trial.
However, please note that only patients who are confirmed to be HER2 negative will be eligible to join the randomised part.</li><li>Received or planned to receive 10 days to 6 months of anastrozole or letrozole prior to surgery.</li><li>Written informed consent to enter the registration stage of the trial and to donation of fresh tissue.</li><li><p>The patient has given written informed consent prior to any study-specific procedures and is willing and able to make herself available for the duration of the study and amenable and able to follow study schedule during treatment and follow-up and for the use of routinely collected electronic health and related records.</p><ul><li>For patients who enter the trial after surgery - patients with a grade 1 tumour at diagnosis will still be eligible for registration if they have Ki67 &gt;&#x2F;=8% at surgery (following &gt;&#x2F;=10 days of pre-surgical AI therapy), as measured at the local site, and meet all other eligibility criteria.</li></ul></li></ol><p>Registration Stage Exclusion Criteria:</p><ol><li>Men and pre&#x2F;perimenopausal women.</li><li>Grade 1 tumours*</li><li>Intended or actual use of HRT or any other oestrogen-containing medication (including vaginal oestrogens) within 4 weeks prior to planned surgery).
Note: patient with a Mirena coil in situ at the time of registration are not excluded.</li><li>Patients who commenced pre-surgical AI therapy &gt;6 months prior to surgery.</li><li>Prior endocrine therapy for breast cancer or breast cancer prevention.</li><li>Prior neoadjuvant chemotherapy for breast cancer.</li><li>Evidence of metastatic disease.</li><li>Locally advanced breast cancer not amenable to surgery.</li><li>Bilateral invasive breast cancer (excluding contralateral DCIS&#x2F;LCIS).</li><li>Multiple unilateral tumours with different ER and&#x2F;or HER2 status.
Synchronous DCIS&#x2F;LCIS, as well as multifocal disease with homogenous ER&#x2F;HER2 status is allowed if at least one lesion is at least 1.5cm; the largest lesion should be used for sample collection and CRF completion.
If ER&#x2F;HER2 status of smaller foci is unknown at time of registration, patients can be registered; however, note that congruity of receptor status will need to be confirmed by the time of randomisation.</li><li>Previous invasive breast cancer except for ipsilateral DCIS or LCIS treated &gt;5 years previously by locoregional therapy alone or contralateral DCIS&#x2F;LCIS treated by locoregional therapy at any time.</li><li>Any invasive malignancy diagnosed within previous 5 years (other than non-melanoma skin cancer or cervical carcinoma in situ).</li><li><p>Any other medical condition likely to exclude the patient from subsequent randomisation stage.
(See exclusion criteria: Eligibility for Randomisation).</p><ul><li>For patients who enter the trial after surgery - patients with a grade 1 tumour at diagnosis will still be eligible for registration if they have Ki67 &gt;&#x2F;=8% at surgery (following &gt;&#x2F;=10 days of pre-surgical AI therapy), as measured at the local site, and meet all other eligibility criteria.</li></ul></li></ol><p>Randomisation stage Inclusion Criteria</p><ol><li>Patient previously consented and registered for screening component of POETIC A.</li><li>Tumour HER2 negative.
HER2 negativity will be defined as per the 2018 ASCO&#x2F;CAP updated guidelines</li><li>Centrally confirmed Ki67 &gt;&#x2F;=8% following 2 weeks of AI.</li><li>Aromatase Inhibitor Resistant-CDK4&#x2F;6 Inhibitor Sensitive (AIR-CIS) signature has been derived in the central laboratory and confirmed to ICR-CTSU.</li><li>Patient must have undergone definitive surgery for the primary breast tumour with clear radial margins as judged by the multidisciplinary team.</li><li>Surgical staging of the axilla must have been undertaken by sentinel node biopsy, axillary sampling or dissection.</li><li>Adjuvant chemotherapy, if prescribed, must have been completed prior to randomisation and patients must have recovered (Common Terminology Criteria for Adverse Events, version 5 [CTCAEv5] Grade &lt;&#x2F;=1) from the acute effects of chemotherapy except for residual alopecia or Grade 2 peripheral neuropathy prior to randomisation.
A washout period of a minimum of 28 days from day 1 of last cycle of treatment is required.</li><li>Adjuvant radiotherapy, if prescribed, must have been completed prior to randomisation, and patients must have recovered (Grade &lt;&#x2F;=1) from the acute effects of radiotherapy.
A washout period of at least 14 days is required between end of radiotherapy and randomisation.</li><li>The patient should be randomised no later than three months after completion of non-endocrine therapy (defined as the final fraction of radiotherapy, Day 1 of the final cycle of chemotherapy or the date of the final surgical procedure)..</li><li>The patient is able to swallow oral medications.</li><li>The patient has adequate organ function for all of the following criteria defined as; ANC &gt;&#x2F;= 1.5 × 10e9&#x2F;L (G-CSF cannot be administered to meet this ANC eligibility criterion) Platelets &gt;&#x2F;= 100 × 10e9&#x2F;L Haemoglobin &gt;&#x2F;= 8g&#x2F;dL Total bilirubin &lt;&#x2F;= 1.5 × ULN (Patients with Gilbert&#x27;s syndrome with a total bilirubin ≤2.0 times ULN and direct bilirubin within normal limits are permitted.)
ALT and AST &lt;&#x2F;= 3 × ULN</li><li>The patient intends to take adjuvant endocrine therapy for at least 5 years.</li><li>The patient has given written informed consent prior to any study-specific procedures (for the randomised intervention part), willing to donate tissue from diagnostic biopsy, and is willing and able to make herself available for the duration of the study and to follow study schedule during treatment and follow-up and for the use of routinely collected electronic health and related records.</li></ol><p>Randomisation stage Exclusion Criteria</p><ol><li>Patient has received prior CDK4&#x2F;6 inhibitor.</li><li>Any patient with a history of VTE (for example, DVT of the leg or arm and&#x2F;or PE) will be excluded.
Patients with a history of venous catheter occlusion by thrombus that did NOT surround the catheter, and the lumen could be made patent by appropriate measures (for example, saline or thrombolytic agent), are not excluded.</li><li>The patient has a serious&#x2F;or uncontrolled pre-existing medical condition(s) that, in the judgment of the investigator, would preclude participation in this study (such as severe renal impairment, [for example, estimated creatinine clearance &lt;30 mL&#x2F;min], interstitial lung disease, severe dyspnoea at rest or requiring oxygen therapy, history of major surgical resection involving the stomach or small bowel, or pre-existing Crohn&#x27;s disease or ulcerative colitis or a pre-existing chronic condition resulting in baseline Grade 2 diarrhoea).</li><li>The patient has a personal history of any of the following conditions: syncope of cardiovascular aetiology, ventricular arrhythmia of pathological origin (including, but not limited to, ventricular tachycardia and ventricular fibrillation), or sudden cardiac arrest.
Exception: patients with controlled atrial fibrillation diagnosed more than 30 days prior to randomisation are not excluded.</li><li>The patient has had major surgery within 14 days prior to randomisation.</li><li>The patient has received an experimental treatment in a clinical trial within the last 30 days or 5 half-lives, whichever is longer, prior to randomisation, or is currently enrolled in any other type of medical research (for example: medical device) judged by the Chief Investigator not to be scientifically or medically compatible with this study.</li><li>The patient has active systemic bacterial infections (requiring IV antibiotics at time of initiating study treatment), systemic fungal infection or detectable viral infection (such as known HIV positivity or with known active hepatitis B or C (e.g.
hepatitis B surface antigen positive).
Screening is not required for enrolment.</li><li>Evidence of metastatic disease.</li><li>Multiple unilateral tumours with different ER and&#x2F;or HER2 status (DCIS&#x2F;LCIS are permitted, and confirmation of congruent ER&#x2F;HER2 status is not necessary for lesions less than 10mm).</li></ol>

Treatment related deaths

Grade 3/4 Adverse Events, SAEs and hospitalisations

5 years from randomisation

from randomisation up to 28 days after treatment discontinuation

2026-03-30

2030-09-30

2028-09-30

2032-03-31

RECRUITING

ACTIVE_NOT_RECRUITING

Royal Berskhire Hospital

Royal Berkshire Hospital

JJenny.lowry@uhs.nhs.uk

Jenny.lowry@uhs.nhs.uk

2022-09

2022-12

2022-09-23

2022-12-19

2022-09-26

2022-12-21

In women with hormone sensitive early breast cancer, taking a hormone therapy (also known as endocrine therapy) for at least five years after surgery is very effective at reducing the risk of the cancer returning.
However, for some women their cancer may eventually become resistant to these drugs.
POETIC-A Registration part will identify those who have a higher risk of developing resistance to standard endocrine therapy (ET).
5000 - 6000 women diagnosed with early stage breast cancer and have not yet had surgery to remove the cancer will enter the Registration stage from 80 centres.
Study doctors will use aromatase inhibitors (AIs), a type of ET, to treat the cancer for 2 weeks before surgery.
A sample will be taken from the cancer during surgery and the study laboratory will measure a biological marker called Ki67.
If the level of Ki67 does not drop after 2 weeks of AI treatment, the patient is likely to be less sensitive to endocrine therapy, and the study doctor will explore additional treatments after surgery in the POETIC-A Treatment part.
Everyone who agrees to join the Treatment stage (2500 patients) will be randomly put into one of the 2 treatment groups; Group1: ET only; or Group2: ET plus a new drug called abemaciclib.
The first aim of the Treatment stage is to confirm whether abemaciclib given in combination with ET is more effective than giving ET alone in preventing the cancer coming back.
The study laboratory will perform a second test on the cancer sample, called an AIR-CIS test.
This test aims to find out if particular groups of patients based on their tumour biology are more suitable for treatment with abemaciclib.
Patients in Group 2 will receive ET plus abemaciclib for 2 years.
Patients in both groups will have regular study visits during this period.

In women with hormone sensitive early breast cancer, taking a hormone therapy (also known as endocrine therapy) for at least five years after surgery is very effective at reducing the risk of the cancer returning.
However, for some women their cancer may eventually become resistant to these drugs.
POETIC-A Registration part will identify those who have a higher risk of developing resistance to standard endocrine therapy (ET).
At least 8000 women diagnosed with early stage breast cancer and have not yet had surgery to remove the cancer will enter the Registration stage from 80 centres.
Study doctors will use aromatase inhibitors (AIs), a type of ET, to treat the cancer for between 2 weeks and 6 months before surgery.
A sample will be taken from the cancer during surgery and the study laboratory will measure a biological marker called Ki67.
If the level of Ki67 does not drop after 2 weeks of AI treatment, the patient is likely to be less sensitive to endocrine therapy, and the study doctor will explore additional treatments after surgery in the POETIC-A Treatment part.
Everyone who agrees to join the Treatment stage (2500 patients) will be randomly put into one of the 2 treatment groups; Group1: ET only; or Group2: ET plus a new drug called abemaciclib.
The first aim of the Treatment stage is to confirm whether abemaciclib given in combination with ET is more effective than giving ET alone in preventing the cancer coming back.
The study laboratory will perform a second test on the cancer sample, called an AIR-CIS test.
This test aims to find out if particular groups of patients based on their tumour biology are more suitable for treatment with abemaciclib.
Patients in Group 2 will receive ET plus abemaciclib for 2 years.
Patients in both groups will have regular study visits during this period.

UNDECIDED

YES