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En undersøgelse til at sammenligne den stabile tilstands biotilgængelighed af injicerbar Letrozole SIE og oral Letrozole hos postmenopausale kvinder med hormonreceptor-positiv tidlig brystkræft (SIE-1)

8. oktober 2026 opdateret af: Rovi Pharmaceuticals Laboratories

Et åbent, enkeltsekvensstudie til evaluering af steady-state sammenlignende biotilgængelighed af kvartalsvis Letrozole SIE og daglig oral Letrozole 2,5 mg (Femara®) hos postmenopausale kvinder behandlet med endokrin terapi for hormonreceptorpositiv tidlig brystkræft. (SIE-1)

The study aims to compare the amount of the drug letrozole that gets into the bloodstream after multiple doses of the quarterly injection Letrozole SIE, versus multiple doses of the standard oral daily tablet of letrozole (Femara®), in women who have gone through menopause and have received treatment for hormone receptor-positive early breast cancer. Participants must have completed at least five years of hormone therapy with at least two of those years with letrozole before starting their participation in the study. Women who have completed four years of hormone therapy are also eligible if their doctor considers them at low risk of cancer returning.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The primary objective of the study is to evaluate the steady-state comparative bioavailability of quarterly injectable Letrozole SIE compared to United States (US)-sourced oral Femara® in the US-sourced arm and of quarterly injectable Letrozole SIE compared to European Union (EU)-sourced oral Femara® in the EU-sourced arm, in post-menopausal women treated with endocrine therapy for hormone-receptor positive (HR+) early breast cancer (EBC). The study also aims to characterize the elimination phase of Letrozole SIE after multiple doses.

The study consists of four periods: Screening, Treatment Period 1 (TP1), Treatment Period 2 (TP2) and Extension Period. After the Screening Period, participants will be randomized to two different arms: US-sourced oral Femara® or EU-sourced oral Femara® for 14 days to achieve the steady-state concentrations of letrozole in TP1. After receiving the latest oral letrozole dose, participants from both arms will start TP2. In TP2, quarterly injectable Letrozole SIE will be administered to achieve steady-state. After TP2, a subset of participants (up to 60 participants, regardless of which study arm they belong to) will continue in the study for the assessment of the elimination phase of Letrozole SIE after multiple doses during the Extension Period.

It is estimated that approximately 120 subjects should be randomized.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

120

Fase

  • Fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • California
      • Beverly Hills, California, Forenede Stater, 90212
        • Rekruttering
        • Precision NextGen Oncology and Research Center (Investigational Site number USA-001)
    • Florida
      • Margate, Florida, Forenede Stater, 33063
        • Rekruttering
        • D&H National Research Centers INC (Investigational Site number USA-002)
      • Port Orange, Florida, Forenede Stater, 32127
        • Rekruttering
        • United Medical Research (Investigational Site number USA-005)
      • Belgrade, Serbien, 11000
        • Rekruttering
        • Investigational Site number SRB-004
      • Belgrade, Serbien, 11080
        • Rekruttering
        • Investigational Site number SRB-002
      • Kamenitz, Serbien, 21204
        • Rekruttering
        • Investigational Site number SRB-001
      • Kragujevac, Serbien, 34000
        • Rekruttering
        • Investigational Site number SRB-003
      • Niš, Serbien, 18000
        • Rekruttering
        • Investigational Site number SRB-005
      • Alcorcón, Spanien, 28922
        • Rekruttering
        • Hospital Universitario Fundación Alcorcón (Investigational Site number ESP-015)
      • Barcelona, Spanien, 08023
        • Rekruttering
        • NEXT Oncology. Phase I Unit / IOB - Hospital Quironsalud Barcelona (Investigational Site number ESP-002)
      • Granada, Spanien, 18014
        • Rekruttering
        • Hospital Universitario Virgen de las Nieves (Investigational Site number ESP-011)
      • Jaén, Spanien, 23007
        • Rekruttering
        • Hospital Universitario de Jaén (HUJ) (Investigational Site number ESP-005)
      • León, Spanien, 24071
        • Rekruttering
        • Complejo Asistencial Universitario de León - Hospital de León (Investigational Site number ESP-013)
      • Lleida, Spanien, 25198
        • Rekruttering
        • Hospital Universitario Arnau de Vilanova de Lleida (Investigational Site number ESP-003)
      • Manresa, Spanien, 08243
        • Rekruttering
        • Althaia Xarxa Assistencial Universitària de Manresa F.P (Investigational Site number ESP-012)
      • Murcia, Spanien, 30120
        • Rekruttering
        • Hospital Clínico Universitario Virgen de la Arrixaca (Investigational Site number ESP-009)
      • Málaga, Spanien, 29004
        • Rekruttering
        • Hospital Quirónsalud Málaga (Investigational Site number ESP-001)
      • Pozuelo de Alarcón, Spanien, 28223
        • Rekruttering
        • NEXT Oncology Phase I Unit - Hospital Universitario Quironsalud Madrid (Investigational Site number ESP-008)
      • Reus, Spanien, 43204
        • Rekruttering
        • Hospital Universitari Sant Joan de Reus (Investigational Site number ESP-004)
      • Sabadell, Spanien, 08208
        • Rekruttering
        • Consorci Corporació Sanitària Parc Taulí - Hospital de Sabadell (Investigational Site number ESP-006)
      • Santiago de Compostela, Spanien, 15705
        • Rekruttering
        • Hospital Clinico Universitario Santiago de Compostela (Investigational Site number ESP-007)

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 80 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Kvinde

Beskrivelse

Inclusion Criteria:

  • Women with weight of ≥50 kg and a Body Mass Index (BMI) ≥19 kg/m2 and ≤39 kg/m2
  • Postmenopausal women.
  • Women with confirmed diagnosis of HR+/HER2- or HR+/HER2+ early stage breast cancer who have completed at least 5 years of endocrine therapy, at least 2 years of which were with letrozole. Participants at a low risk of relapse, as assessed by the investigator, can also be eligible after completing 4 years of adjuvant endocrine therapy, at least 2 of which were with letrozole.
  • Women in good health.
  • Women who have undergone breast imaging per applicable guidelines (e.g., mammogram) within the last 12 months with no evidence of malignancy (documentation required), and if not done, must be willing to have 1 performed prior to baseline.

Exclusion Criteria:

  • Presence of an uncontrolled, unstable, clinically significant medical condition.
  • Have used estrogen or progesterone systemic or topical therapy, oral contraceptives, androgens, LH-releasing hormone analogs, prolactin inhibitors, or antiandrogens within 3 months prior to screening.
  • Use of inducers or inhibitors of CYP3A4 and CYP2A6.
  • Diagnosed with osteoporosis.
  • Preexisting cardiovascular disease
  • Positive result for hepatitis B surface antigen, hepatitis B core antibody, hepatitis C antibody, or HIV antibodies.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: US-sourced oral Femara®

US-sourced Femara® 2.5 mg/day oral for 14 days (treatment period 1) + quarterly injectable Letrozole SIE (treatment period 2)

Eksperimentel: EU-produceret oral Femara®

EU-sourced oral Femara® 2.5 mg/day for 14 days (treatment period 1) + quarterly injectable Letrozole SIE (treatment period 2)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Area under the concentration-time curve within a dosing interval at Steady-State (SS AUCtau)
Tidsramme: After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® on Day 14 TP1

Individual and mean area under the concentration-time curve within a dosing interval at steady-state

After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® on Day 14 TP1

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Adverse Events
Tidsramme: From the time of obtaining signed informed consent until the final follow-up visit on Day 281 (or Day 421 for the subset of participants in the Extension Period)

Incidence of adverse events (type, severity, seriousness, and relationship to study drug), including the incidence of treatment-emergent adverse events (TEAEs), the incidence of serious TEAEs, and the incidence of TEAEs leading to treatment discontinuation.

From the time of obtaining signed informed consent until the final follow-up visit on Day 281 (or Day 421 for the subset of participants in the Extension Period)
Injection site reactions
Tidsramme: At pre-dose and 1 hour after each Letrozole SIE administration in TP2

Incidence of injection site reactions

At pre-dose and 1 hour after each Letrozole SIE administration in TP2
Injection-related pain score
Tidsramme: From baseline TP2 to the follow-up visit on Day 281

Changes in injection-related pain score by numeric rating scale (NRS). The NRS evaluates the intensity of injection-related pain experienced at the time of Letrozole SIE administration. It is scored from 0 to 10 (0 meaning no pain and 10 meaning the worst possible pain).

From baseline TP2 to the follow-up visit on Day 281
Bone mineral density (BMD) by dual energy x-ray absorptiometry (DXA)
Tidsramme: From screening to Day 281 TP2

Changes in bone mineral density BMD by DXA

From screening to Day 281 TP2
Average plasma drug concentration during a dosing interval at Steady-State (SS Cave)
Tidsramme: After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1

Individual and mean steady-state average plasma drug concentration during a dosing interval

After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1
Minimum drug concentration at steady-state (Cmin ss)
Tidsramme: After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1

Minimum drug concentration at steady-state

After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1
Maximum plasma concentration at steady-state (Cmax ss)
Tidsramme: After multiple doses of Letrozole SIE at Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1

Maximum plasma concentration at steady-state

After multiple doses of Letrozole SIE at Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1
Letrozole blood level percent fluctuation
Tidsramme: After multiple doses of Letrozole SIE at Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1

Individual and mean letrozole blood percent fluctuation

After multiple doses of Letrozole SIE at Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1
Time to peak observed concentration (Tmax)
Tidsramme: After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1

Time to peak observed concentration

After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1
Steady-State (SS)
Tidsramme: After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1

Characterization of the steady-state

After multiple doses of Letrozole SIE until Day 281 TP2 and after multiple doses of US-sourced oral Femara® or EU-sourced oral Femara® at Day 14 TP1
Terminal rate constant (λz)
Tidsramme: After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period

Individual and mean Terminal rate constant (λz) after multiple doses of Letrozole SIE in the subset of participants in the Extension Period

After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period
Terminal half-life (t1/2)
Tidsramme: After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period

Individual and mean Terminal half-life after multiple doses of Letrozole SIE in the subset of participants in the Extension Period

After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period
Area under the curve extrapolated to infinity (AUC∞)
Tidsramme: After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period

Individual and mean Area under the curve extrapolated to infinity after multiple doses of Letrozole SIE in the subset of participants in the Extension Period

After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period
Area under the curve that is extrapolated (AUCextrap)
Tidsramme: After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period

Percentage of area under the curve that is extrapolated after multiple doses of Letrozole SIE in the subset of participants in the Extension Period

After multiple doses of Letrozole SIE in TP2 until Day 421 in the Extension Period

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Hormone supression
Tidsramme: From screening to the final follow-up visit on Day 281 (or Day 421 for the subset of participants in the Extension Period)

Analysis of letrozole exposure and hormone suppression measuring the sex hormone estrone (E1), sulfate estrone (SE1), and estradiol (E2) plasma levels.

From screening to the final follow-up visit on Day 281 (or Day 421 for the subset of participants in the Extension Period)
CYP2A6 genotyping
Tidsramme: From screening to final follow-up visit Day 281 (or Day 421 for the subset of participants in the Extension Period)

Proportion of participants in each CYP2A6 metabolizer phenotype category (normal, intermediate, slow)

From screening to final follow-up visit Day 281 (or Day 421 for the subset of participants in the Extension Period)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

8. juni 2026

Primær færdiggørelse (Anslået)

1. maj 2028

Studieafslutning (Anslået)

1. oktober 2028

Datoer for studieregistrering

Først indsendt

22. januar 2026

Først indsendt, der opfyldte QC-kriterier

3. februar 2026

Først opslået (Faktiske)

10. februar 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. oktober 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

8. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • ROV-SIE-2025-01
  • 2025-523269-31-00 (Ctis)
  • 2025 (U.S. NIH-bevilling/kontrakt)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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