E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Rectovaginal endometriosis |
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E.1.1.1 | Medical condition in easily understood language |
Rectovaginal endometriosis |
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E.1.1.2 | Therapeutic area | Diseases [C] - Female diseases of the urinary and reproductive systems and pregancy complications [C13] |
MedDRA Classification |
E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To assess the efficacy of 200 mg OBE2109 daily for 12 weeks followed by 100 mg OBE2109 daily for 12 weeks on reduction of the volume of rectovaginal endometriosis node. |
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E.2.2 | Secondary objectives of the trial |
Efficacy objectives The efficacy of OBE2109 will be further assessed in: · Reducing pelvic pain in subjects with moderate to severe endometriosis pain · Reducing pain associated with sexual intercourse (dyspareunia) · Reducing pain associated with defecation (dyschezia) · Improving quality of life · The subject’s perception of change in her endometriosis condition · Reducing bowel involvement for subjects with type III rectovaginal endometriosis · Reducing incidence of uterine bleeding
Safety objective To assess the overall safety of 24 weeks of daily administration of OBE2109 in subjects with rectovaginal endometriosis. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. The subject must provide written informed consent prior to initiation of any study related procedures. 2. The subject must be a pre-menopausal woman aged between 18 and 48 years inclusive at screening. 3. The subject must have history of regular menstrual cycles every 21-35 days and without intermenstrual bleeding heavier than spotting or staining. 4. The subject has Follicle-Stimulating Hormone (FSH) level ≤ 20 IU/L at screening. 5. The subject has endometriosis with presence of a rectovaginal node (type II or III) of at least 2 cm at vaginal examination confirmed on MRI, and: · Moderate to severe scoring on the mB&B scale for two out of the three subject assessed symptoms (dysmenorrhea, non-menstrual pelvic pain and dyspareunia), and · Pain during vaginal examination. 6. The subject has a Body Mass Index (BMI) ≥18 and ≤35 kg/m². 7. If of childbearing potential, the subject agrees to use one of the following birth control methods during the entire length of the treatment period of the study: a. Sexual abstinence from heterosexual intercourse if routinely and consistently practised b. Partner with vasectomy performed at least 6 months prior to the screening visit and with confirmed azoospermia c. Double non-hormonal barrier contraception such as condom or diaphragm each combined with spermicide. 8. If of non-childbearing potential, the subject must have had tubal ligation sterilisation at least two months before the screening visit. |
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E.4 | Principal exclusion criteria |
1. The subject has an abnormal endometrial biopsy within 6 months prior to starting study treatment (atypical hyperplasia, endometritis, polyps or carcinoma). 2. The subject has endometrioma with a diameter >3cm. 3. The subject has a previous bowel (rectal or sigmoid) resection. 4. The subject has had surgery for deep endometriosis in the 6 months preceding the screening visit. 5. The subject has had breast examination findings requiring intervention within the 6 months preceding the screening visit. 6. The subject has or has had an active pelvic infection within 1 month preceding the screening visit. 7. The subject is using an intrauterine device (IUD) or has used an IUD within the 3 months preceding the screening visit. 8. The subject is likely to require treatment during the study OR received treatment within a specified period prior to the screening visit with any of the medications listed below: • Gonadotropin releasing hormone (GnRH) antagonists 3 months • GnRH agonist injections/3-month depot injections 3 months/6 months • Oral contraceptives and other sex hormones 1 month • Depot contraceptives 6 months • Selective Progesterone Receptor Modulators (SPRMs) Selective Estrogen Receptor Modulators (SERMs) 3 months • Systemic glucocorticoid treatments for acute diseases (not depot) 1 month 9. The subject is using or anticipates to use any of the following drugs: anticoagulants, aminocaproic acid, or any other medications that affect menstrual bleeding such as tranexamic acid. 10. The subject is pregnant or breast-feeding or is planning a pregnancy within the duration of the treatment period of the study. 11. The subject has history of known failed treatment with GnRH agonists or GnRH antagonists. 12. The subject has history of or current systemic glucocorticoid therapy for treatment of chronic diseases (e.g. Systemic Lupus Erythematosus (SLE), rheumatic arthritis). 13. The subject has history of, or known osteoporosis or other metabolic bone disease. 14. The subject has alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transpeptidase (GGT) or total bilirubin ≥ 2 times the upper limit of normal. 15. The subject has known positive HIV or viral hepatitis serology. 16. The subject has any known condition, including findings in the medical history or in the screening assessments which, in the opinion of the investigator, constitutes a risk or a contraindication to the participation of the subject in the trial or that could interfere with the trial objectives, conduct or evaluation. 17. The subject has history of (within twelve months prior to the screening visit), or known current problems with alcohol or drug abuse (including painkiller abuse). 18. The subject has any condition rendering her unable to understand the nature, scope and possible consequences of the study, and/or evidence of an uncooperative attitude. 19. The subject has been administered any experimental drug in the 12 weeks before start of study treatment. |
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E.5 End points |
E.5.1 | Primary end point(s) |
Change from baseline to week 24 in volume of rectovaginal endometriosis nodes measured by Magnetic Resonance Imaging (MRI) measuring central lesion and the entire invasion front, i.e. including the specula. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
Efficacy: 1. Change from baseline to weeks 12 and 36 in volume of rectovaginal endometriosis nodes measured by MRI measuring central lesion and the entire invasion front, i.e. including the specula 2. Change from baseline to weeks 12, 24 and 36 in volume of rectovaginal endometriosis nodes measured by TransVaginal UltraSound (TVUS) 3. Change from baseline to week 24 in bowel involvement on barium enema and MRI for subjects with type III rectovaginal endometriosis 4. Change from baseline to weeks 12, 24 and 36 in volume of rectovaginal endometriosis nodes measured by vaginal examination 5. Change from baseline to weeks 12, 24 and 36 in dysmenorrhea, pelvic pain and dyspareunia according to the modified Biberoglu & Behrman (mB&B) scale 6. Change from baseline to weeks 4, 8, 12, 16, 20, 24 and 36 in global pelvic pain assessed over the preceding 4-week period using a Numerical Rating Scale (NRS) with a monthly recall 7. Change from baseline to weeks 4, 8, 12, 16, 20, 24, 28, 32 and 36 in the mean monthly dyspareunia score assessed as the mean of available daily dyspareunia scores over the preceding 4-week period assessed on the Verbal Rating Scale (VRS) dyspareunia scale and on a NRS 8. Change from baseline to weeks 4, 8, 12, 16, 20 and 24 in the mean monthly dyschezia score defined as the mean of weekly dyschezia scores over the preceding 4-week period using a NRS 9. No uterine bleeding (or spotting only) during the 4-week period preceding weeks 4, 8, 12, 16, 20 and 24 using a simplified bleeding scale 10. Time to amenorrhea 11. Change from baseline to weeks 12, 24 and 36 in the Endometriosis Health Profile questionnaire (EHP-30) 12. Patient Global Impression of Change (PGIC) score at weeks 12, 24 and 36.
Safety: 1. Treatment Emergent Adverse Events (TEAEs) frequency and severity 2. Changes from baseline to weeks 4, 8, 12, 16, 20 and 24 in clinical laboratory assessments (haematology, coagulation parameters, haemoglobin, biochemistry, estradiol and lipids). 3. Any pathological changes from baseline in the endometrium as assessed by histology from endometrial biopsies performed at week 24 (and week 36 only if no endometrial biopsy was obtained at week 24 or diagnosis at week 24 was different from “benign endometrium”). 4. Change from baseline in any other safety parameters including weight, vital signs, gynecological assessment, breast assessment and endometrial thickness. |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Efficacy: 1. Week 12 and 36 2. Week 12, 24 and 36 3. Week 24 4. Week 12, 24 and 36 5. Week 12, 24 and 36 6. Week 4, 8, 12, 16, 20, 24 and 36 7. Week 4, 8, 12, 16, 20, 24, 28, 32 and 36 8. Week 4, 8, 12, 16, 20, 24 9. Week 4, 8, 12, 16, 20, 24 10. Throughout the study 11. Week 12, 24, 36 12. Week 12, 24, 36
Safety: 1. Throughout the study 2. Week 4, 8, 12, 16, 20, 24 3. Week 24, 36 4. Throughout the study |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | No |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 1 |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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For administrative and safety reporting purposes the end of the study will be defined as the date of the final clinical database lock after the last subject has completed Week 36 visit. |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 1 |
E.8.9.1 | In the Member State concerned months | 4 |
E.8.9.1 | In the Member State concerned days | 0 |