ClinicalTrials.gg
Not yet recruitingNCT07005882HELPUpdated Jun 5, 2025

Hormonal Receptor (HR)-Positive HER2 Negative Breast Cancer Patients Treated With Preoperative ELacestrant and PULSAR Radiotherapy

A Phase 2 interventional study of Elacestrant and PULSAR in Breast Cancer Patients, Breast Cancer Early Stage Breast Cancer (Stage 1-3) and HR+/HER2- Breast Cancer, sponsored by Azienda Ospedaliero-Universitaria Careggi. Not yet recruiting at 1 site in Italy. Open to participants aged 50 Years and older. Per ClinicalTrials.gov, last updated 2025-06-05.

Sponsored by Azienda Ospedaliero-Universitaria Careggi · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
21
Allocation
Not applicable
Ages
50 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 24 studies testing elacestrant in Breast Neoplasms — 15 open to participants now, 18 under way, 3 of them phase 3. elacestrant · Breast Neoplasms.

Planned enrollment
21st of 24
21 · median 72
Started
2025
with 3 others
Phase 2
11 of 24
10 open now
Primary completion
2027-03
later than 5 of 17 live
Registered
15th of 24
by date
Lead sponsor
1 of 24
Azienda Ospedaliero-Universitaria Careggi

Among the 24 studies testing elacestrant in Breast Neoplasms, this one is the 21st largest by planned enrollment, is one of 4 that started in 2025, is one of 11 in phase 2, reaches primary completion later than 5 of the 17 other live ones, and was the 15th registered.

Breast Neoplasms

14,825 studies on the registry are indexed under Breast Neoplasms; 3,319 are open to participants now.

Browse Breast Neoplasms studies →

Open to participants now

15 of the 24 studies testing elacestrant in Breast Neoplasms are open now, in 12 countries. Recruiting first, the newest first:

9 more — sign in →

By country, each count listing its studies:

All 15 open studies →

About elacestrant

elacestrant: first FDA approval 2023 (ORSERDU), first EMA approval 2023. What it is approved for, and how studies give it, is on its page →

Who these studies take

Of the 2,400 Breast Neoplasms studies recruiting now, 1,572 (66%) set no upper age limit and 591 (25%) stop at 75 or younger; 103 take children under 18; 214 take healthy volunteers.

This study: 50 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 24 studies testing elacestrant in Breast Neoplasms, or all of them as a file.
02

Study summary

This is a proof-of-concept phase II trial to assess the safety (as primary endpoint) and clinical efficacy of neoadjuvant therapy with Elacestrant and PULSAR.

The study will enroll 21 postmenopausal patients with early HR+ HER2- node positive BC, clinically staged II-III. Patients will receive Elacestrant 345 mg orally once daily for 24 weeks and PULSAR on the MRI-based breast gross tumor volume (GTVt), consisting of 10 Gy "pulse" every 4 weeks for a maximum of 5 or less in case of radiologic complete response.

Surgery will be planned 24 weeks after Elacestrant initiation and at least 2 weeks from the last pulse and will be performed as per recommended clinical practice. Patients will then receive adjuvant systemic therapy as per standard of care and postoperative RT to the locoregional lymph nodes in case of nodal residual disease, if indicated.

03

Conditions studied

  • Breast Cancer Patients
  • Breast Cancer Early Stage Breast Cancer (Stage 1-3)
  • HR+/HER2- Breast Cancer
  • Radiation Therapy

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04

Who can participate

Ages eligible
50 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. proven HR-positive, -negative BC
  2. Clinical disease stage II-III
  3. female patients or male patients
  4. Eligible for treatment and subsequent surgery
  5. No to MRI
  6. Patient able to understand and follow instructions during the trial
  7. Patient able and willing to give written , signed and dated
  8. Patient aged at least 50 years old
  9. Patient with tumor accessible for and surgery
  10. Patient with adequate bone marrow function at Screening, confirmed at Baseline, including:

    1. ≥ 1.5 × 109/L; patients with documented benign cyclical neutropenia are eligible if white blood cell count is ≥ 1.5 × 109/L, with ANC ≥ 1.0 × 109/L, leukocytes ≥ 4.0 × 109/L, and lymphocytes ≥ 0.6 × 109/L;
    2. ≥ 100 × 109/L;
    3. ≥ 9 g/dL (may have been transfused);
  11. (INR) \< 1.5× (ULN); patients treated with vitamin K antagonist are eligible if INR \< 3
  12. Patient with adequate hepatic function at Screening, confirmed at Baseline, defined by:

    a. total level ≤1.5×ULN; patients with documented Gilbert disease are allowed if total bilirubin ≤3×ULN; (AST) level ≤2.5×ULN, and alanine aminotransferase (ALT) level ≤2.5×ULN,

  13. Patient with adequate renal function at Screening, confirmed at Baseline, defined by ≥ 30 mL/min using 2021 CKD-EPI creatinine equation
  14. Patient with (ECOG) performance status ≤ 2
  15. of at least 12 months according to the Investigator's judgement

Exclusion criteria

Exclusion Criteria:

    1. Patients with stage IV disease 2. Patients with a history of any disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding that, based on the Investigator's judgement, provides a reasonable suspicion of a disease or condition that contraindicates the use of RT and/or Elacestrant or that might affect the interpretation of the trial results or render the patient at high risk for treatment complications.

      1. Patients with any significant co-morbidity which, according to the Investigator's judgement, makes patient compliance to trial conditions unlikely.
      1. Patients with previous malignant disease (other than the tumor disease for this trial) within the last five (5) years (except adequately treated non-melanoma skin cancers and carcinoma in situ of skin, bladder, cervix, colon/rectum, breast, or prostate) unless a complete remission without further recurrence was achieved at least two (2) years prior to Screening, and the patient is deemed to have been cured with no additional therapy required or anticipated to be required.
      1. Patients with a history of uncontrolled intercurrent illness. 6. Patients with a known prior or to Elacestrant or any component in its formulations.
      1. Patients with severe acute or chronic medical conditions, including:
      2. Immune colitis
      3. Inflammatory bowel disease
      4. History of severe vomiting or diarrhea not having resolved to Grade 1 at Baseline
      5. Immune pneumonitis
      6. Pulmonary fibrosis
      7. Psychiatric conditions including recent (within the last year) or active suicidal ideation or behavior
      8. Laboratory abnormalities that may increase the risk associated with trial participation or trial treatment administration or may interfere with the interpretation of trial results and, in the judgement of the Investigator, would make the patient inappropriate for entry into this trial.

        1. Patients with a history of small intestine resection surgery or other major gastrointestinal surgery.
        1. Patients with an active infection requiring systemic therapy with antibiotics (at both Screening and Baseline).
        1. Patients with a known history of (HIV) or known acquired immunodeficiency syndrome or multi-drug-resistant gram-negative bacteria.
        1. Patients with virus (HBV) or virus (HCV) infection at Screening (positive HBV surface antigen or HCV RNA if anti-HCV antibody Screening test positive).
        1. Patients with increased anesthesiological risk (e.g. known or predicted difficult airway) if general anesthetic is required.
        1. Premenopausal patients (defined as any woman who is not surgically sterile with a hysterectomy and/or bilateral oophorectomy or >12 months of amenorrhea and at least 50 years of age) 14. Patients aged less than 50 years old. 15. Patients with a known history of drug/substance abuse. 16. Patients participating in any other clinical trial within 30 days before Screening.
        1. Patients receiving any other treatment that, in the opinion of the Investigator, might interfere with the trial.
        1. Concomitant use of strong or moderate inhibitors should be avoided and an alternative concomitant medicinal product with no or minimal potential to inhibit CYP3A4 should be considered.
        1. Concomitant use of strong or moderate CYP3A4 inducers should be avoided and an alternative concomitant medicinal product with no or minimal potential to induce CYP3A4 should be considered.
        1. Patients with a current drug or substance abuse. 21. Patients receiving chronic concurrent therapy within two (2) weeks before the trial treatment or expected therapy during the trial treatment period with:

      <!-- -->

      1. (except systemic corticosteroids up to 10 mg prednisolone or equivalent daily dose).
      2. agents.
      3. Antibiotics.
      4. Any other anticancer therapy or concurrent anticancer treatment. 22. Patients who are unable to understand the protocol requirements, instructions and trial-related restrictions, the nature, scope, and possible consequences of the trial.

        1. Patients who are unlikely to comply with the Protocol requirements, instructions and trial-related restrictions, e.g., uncooperative attitude, inability to return for follow-up visits, and improbability of completing the trial.
        1. Patients with legal incapacity or limited legal capacity. 25. Patients with any condition which results in an undue risk for the patient during the trial participation according to the Investigator.
Terms in these criteria, in plain language(24)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

HER2

HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.

In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Adjuvant and neoadjuvant

Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

CYP3A (CYP3A4) inhibitors and inducers

CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.

Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
21 participants (estimated)

Study arms

  • Experimental
    Preoperative Elacestrant+PULSAR

    Drug: Elacestrant · Radiation: PULSAR

Interventions

  • Preoperative treatment

  • RadiationPULSAR

    Preoperative treatment

06

What researchers measure

Primary outcomes

  1. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of reported adverse events (AEs) and serious adverse events (SAEs), according to CTCAE v5.0. Evaluation of changes from Baseline during the Treatment and Follow-up periods.

    Time frame: Baseline, every two weeks in the pre-operative period, 30 days and 3 months after surgery

  2. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - laboratory parameters: hematology (Hemoglobin, HMCV, MCH, MCHC, RBC, WBC with differential count, and platelet count); biochemistry (Sodium, potassium, calcium, chloride, glucose (fasting), anorganic phosphate, cholesterol, triglycerides, total protein, uric acid, urea, creatinine, total bilirubin, alkaline phosphatase, ALT, AST, gamma-GT, LDH, CPK, amylase, and lipase); coagulation (PT, INR and activated partial thromboplastin time); and urinalysis (Leukocytes, nitrite, pH, protein, glucose, ketone, urobilinogen, bilirubin, hemoglobin, erythrocytes, specific gravity.). These values will be used to assess the patient's health status and the presence of any adverse events that may have arisen after therapy.

    Time frame: Baseline, every two weeks unitl week 4, then every 4 weeks in the pre-operative period, 30 days and 3 months after surgery

  3. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - physical examinations: (i.e. ECOG PS 0-5).

    Time frame: Baseline, every two weeks in the pre-operative period, 30 days, 3 months, 6 months and 12 months after surgery

  4. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - vital signs: temperature in °C

    Time frame: Baseline, every two weeks until week 4 and then every 4 weeks in the pre-operative period, 30 days, 3 months, 6 months and 12 months after surgery

  5. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - electrocardiograms: heart rate, PR/PQ interval, QRS interval, QT interval.

    Time frame: Baseline, at the beginning (week 0) and at the end (week 20) of pre-operative treatment.

  6. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - vital signs: heart rate in beats/min (bpm).

    Time frame: Baseline, every two weeks until week 4 and then every 4 weeks in the pre-operative period, 30 days, 3 months, 6 months and 12 months after surgery

  7. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - vital signs: blood pressure in mmHg.

    Time frame: Baseline, every two weeks until week 4 and then every 4 weeks in the pre-operative period, 30 days, 3 months, 6 months and 12 months after surgery

  8. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - vital signs: respiratory frequency in breaths/min.

    Time frame: Baseline, every two weeks until week 4 and then every 4 weeks in the pre-operative period, 30 days, 3 months, 6 months and 12 months after surgery

  9. Safety of Elacestrant combined with PULSAR radiation therapy in preoperative setting

    Evaluation of changes from Baseline during the Treatment and Follow-up periods in: - vital signs: SpO2 in %.

    Time frame: Baseline, every two weeks until week 4 and then every 4 weeks in the pre-operative period, 30 days, 3 months, 6 months and 12 months after surgery

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Sep 2025; primary completion for Mar 2027, 18 months later.

Of 1,070 non-industry phase 2 interventional studies under Breast Neoplasms, half reached primary completion within 56 months of starting (the median), counting those still running; a quarter within 34 and three quarters within 87. This study's planned 18 months is below that.

Counting every sponsor, half of 1,302 studies reached it within 51 months; a quarter within 30 and three quarters within 82.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 25, 2025
First posted
Jun 5, 2025
StartEst.
Sep 1, 2025
Primary completionEst.
Mar 1, 2027
CompletionEst.
Mar 1, 2028
Last update
Jun 5, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 5, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07005882
Lead sponsor
Azienda Ospedaliero-Universitaria Careggi
Responsible party
Lorenzo Livi (Full Professor, Azienda Ospedaliero-Universitaria Careggi) — Principal investigator
First posted
Jun 5, 2025
Start date
Sep 1, 2025 (estimated)
Primary completion
Mar 1, 2027 (estimated)
Completion
Mar 1, 2028 (estimated)
Last update
Jun 5, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Mar 2025. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: Elacestrant

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