A long-term study to assess the safety and efficacy of efgartigimod in adult patients with primary immune thrombocytopenia (an autoimmune disorder that destructs platelets, blood cells that help with clotting, and can lead to easy or excessive bruising and bleeding)

Phase 1

• Conditions: Primary immune thrombocytopenia; MedDRA version: 23.0Level: LLTClassification code 10050245Term: Autoimmune thrombocytopeniaSystem Organ Class: 100000004851; Therapeutic area: Diseases [C] - Immune System Diseases [C20]

• Registration Number: EUCTR2019-002101-21-PL
• Lead Sponsor: argenx BV

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2021-07-15
• Last Update Posted: 10 June 2024

Recruitment & Eligibility

• Status: ot Recruiting
• Sex: All
• Target Recruitment: 156

Inclusion Criteria

1. Ability to understand the requirements of the trial, to provide written informed consent (including consent for the use and disclosure of research-related health information), and to comply with the trial protocol procedures (including required trial visits).
2. Patients enrolled in the ARGX-113-1801 trial who completed the 24-week trial period.
3. Women of childbearing potential must have a negative urine pregnancy test at baseline before trial medication (infusion) can be administered. Women are considered of childbearing potential unless they are post-menopausal (defined by continuous amenorrhea) for at least 1 year with a FSH of >40 IU/L or are surgically sterilized (ie, women who had a hysterectomy, a bilateral salpingectomy, both ovaries surgically removed, or have a documented permanent female sterilization procedure including tubal ligation). Follicle-stimulating hormone can be used to confirm post-menopausal status in amenorrheic patients not on hormonal replacement therapy.
4. Women of childbearing potential should use a highly effective or acceptable method of contraception during the trial and for 90 days after the last administration of the IMP. They must be on a stable regimen, for at least 1 month:
• combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation
- oral
- intravaginal
- transdermal
• progestogen-only hormonal contraception associated with inhibition of ovulation:
- oral
- injectable
- implantable
• intrauterine device (IUD)
• intrauterine hormone-releasing system
• bilateral tubal occlusion
• vasectomized partner(provided that the partner is the sole sexual partner of the trial participant and that aspermia was documented post-procedure)
• continuous abstinence from heterosexual sexual contact. Sexual abstinence is only allowable if it is the preferred and usual lifestyle of the patient. Periodic abstinence (calendar, symptothermal, post-ovulation methods) is not acceptable.
• male or female condom with or without spermicide
• cap, diaphragm, or sponge with spermicide.
5. In addition to the above criteria, for patients who want to continue receiving efgartigimod during an additional 52-week treatment period (only applicable in case efgartigimod is not yet commercially available for patients with primary ITP, or becomes available through another
patient program for patients with primary ITP):
6. Ability to understand the requirements of the additional 52-week treatment period of the trial, to provide written informed consent (including consent for the use and disclosure of research- related health information), and to comply with the trial protocol procedures (including required trial visits).
7. Patient has completed a 52-week treatment period.
Are the trial subjects under 18? no
Number of subjects for this age range:
F.1.2 Adults (18-64 years) yes
F.1.2.1 Number of subjects for this age range 140
F.1.3 Elderly (>=65 years) yes
F.1.3.1 Number of subjects for this age range 16

Exclusion Criteria

1. Introduction or continuation of non-permitted medications during the ARGX-113-1801 trial (such as anti-CD20 therapy, romiplostim, monoclonal antibodies, Fc fusion proteins or live/live-attenuated vaccines).
2. Pregnant or lactating women, and those intending to become pregnant during the trial or within 90 days after the last dosing.
3. Patients with known medical history of hypersensitivity to any of the ingredients of efgartigimod.
4. Use of any other investigational drug or participation in any other investigational trial.

Study & Design

• Study Type: Interventional clinical trial of medicinal product
• Study Design: Not specified