GnRHa + Letrozole in Obese Progestin-insensitive Endometrial Cancer Patients

Phase 3RecruitingNCT06379113

Xiaojun Chen29 enrolled

Overview

To investigate the efficacy of GnRHa plus letrozole in obese progestin-insensitive EEC patients.

There were more and more women with early endometrioid endometrial cancer (EEC) and atypical endometrial hyperplasia (EAH) who want to preserve fertility. Approximately 70% to 80% of females who meet the criteria for conservation treatment are able to achieve CR after progestin therapy, with a median time of 6-7 months, but about 20% to 30% of patients get no response or need to take longer time to achieve remission (over one year). With long duration of treatment, there will be more side effects such as weight gain, impaired liver function, endometrial injury, ovarian reserve inhibition etc. which will decrease the efficacy of conservative treatment. Previous researches had shown that GnRHa plus letrozole could be a better second-line treatment for obese progestin-insensitive patients. Till now, no similar studies were found, so we design this study to explore the efficacy of GnRHa plus letrozole in obese progestin-insensitive EEC and EAH patients to provide new evidences for improving conservative treatment efficacy. We defined obese patients as these with BMI ≥ 30kg/m2. This will be a single-centred prospective pilot study. Patients diagnosed as obese progestin-insensitive EEC by dilatation and curettage (D\&C) or hysteroscopy will be enrolled. The primary endpoint is cumulative complete response (CR) rate at 28 weeks of treatment. The secondary endpoints include adverse events, duration of complete response, recurrent rate, pregnancy rate and quality of life of patients.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Endometrial Neoplasms Atypical Endometrial Hyperplasia Progesterone Resistance Obesity

Interventions

GnRH antagonistDRUG

Gonadotropin-releasing hormone analogue, intramuscular injection of 3.75mg will be given every 4 weeks, and the maximum treatment courses will be 6. If the patient get CR within 6 courses, another 2 courses will be used as consolidation therapy.

Letrozole 2.5mgDRUG

2.5mg po qd.

Eligibility

Sex: FEMALEMin age: 18 YearsMax age: 45 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Have a confirmed initial pathological diagnosis based upon hysteroscopy: histologically prove well-differentiated EEC G1 without myometrial invasion * BMI≥30kg/m2 * No signs of suspicious extrauterine involvement on enhanced magnetic resonance imaging (MRI) or enhanced computed tomography (CT) or ultrasound * Using progestin, any of the following therapy, as first-line treatment: 1. Megestrol acetate ≥ 160 mg qd using, combined with Levonorgestrel Lntrauterine System (LNG-IUS) inserted or not 2. Medroxyprogesterone acetate ≥ 250 mg qd using, combined with LNG-IUS inserted or not 3. LNG-IUS inserted * Progestin-insensitive: 1. remained with stable disease after 7 months of progestin use 2. did not achieve CR after 10 months of progestin use * Have a desire for remaining reproductive function or uterus * Good compliance with adjunctive treatment and follow-up Exclusion Criteria: * Combined with severe medical disease or severely impaired liver and kidney function * Pathologically confirmed as endometrial cancer with suspicious myometrial invasion or extrauterine metastasis * Patients with other types of endometrial cancer or other malignant tumors of the reproductive system * Patients with breast cancer or other hormone- dependent tumors or diseases that cannot be used with GnRHa or Letrozole * Strong request for uterine removal or other conservative treatment * Known or suspected pregnancy * Acute severe disease such as stroke or heart infarction or a history of thrombosis disease * Smoker(\>15 cigarettes a day)

Locations (2)

Tenth People's Hospital of Tongji University

Shanghai, Shanghai Municipality, China

RECRUITING

Obstetrics and Gynecology Hospital, Fudan University

Shanghai, China

RECRUITING

Outcomes

Primary Outcomes

Complete response rates within 28 weeks of treatment

The cumulative 28-week CR rates will be calculated in two groups. Patients will be evaluated with an hysteroscopy every 12 to 16 weeks. For some may delay the evaluation as personal reasons, we define the primary outcome measure as complete response rates within 28 weeks of treatment.

Time frame: Up to 28 weeks

Secondary Outcomes

Adverse events

Number of participants with treatment-related adverse events as assessed by CTCAE v5.0 will be recorded, as well as incidence of adverse events.

Time frame: Through study completion, an average of 28 weeks

Time to achieve complete response

The median CR time will be calculated.

Time frame: Up to 28 weeks

Relapse rates

Time frame: Through study completion, an average of 2 years

Rates of fertility outcomes

Time frame: Through study completion, an average of 2 years

Compliance

Data on treatment and hysteroscopy management will be collected, and deviations from study protocol will be recorded in writing. For example, the time of drug interruptions due to related toxicities or AEs, and delay of hysteroscopy for personal reasons.

Time frame: Through study completion, an average of 28 weeks

Central Contacts

Xiaojun Chen, PhD

CONTACT

8602133189900 cxjlhjj@163.com

Pengfei Wu

CONTACT

8602133189900 leofinger@163.com

Data from ClinicalTrials.gov

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