A Study of the Safety, Tolerability, Pharmacokinetics and Efficacy of Treatment With AP1189 in Patients With iMN and Severe Proteinuria

SynAct Pharma

Status and phase: Enrolling; Phase 2

Conditions: Severe Proteinuria Due to Idiopathic Membranous Nephropathy; Nephrotic Syndrome Due to Idiopathic Membranous Nephropathy

Treatments: Drug: 100 mg AP1189; Drug: Placebo

Study type: Interventional

Funder types: Industry

Identifiers

NCT04456816

SynAct-CS003

Details and patient eligibility

About

This study is an exploratory, randomized, double-blind, multicenter, placebo-controlled study with repeated doses of AP1189. The study population will consist of patients with idiopathic membranous nephropathy (iMN) and severe proteinuria who are on ACE inhibitor or angiotensin II receptor blocker treatment.

Full description

This study is an exploratory, randomized, double-blind, multicenter, placebo-controlled study with repeated doses of AP1189. The study population will consist of patients with idiopathic membranous nephropathy (iMN) and severe proteinuria who are on ACE inhibitor or angiotensin II receptor blocker treatment.

Following a successful screening, subjects who fulfill the enrollment criteria will be randomized in a 2:1 ratio in group A and B:

• Group A (12 subjects): AP1189 dose 100 mg, once daily for 12 weeks (28 days) as an add-on to any ongoing treatment, including ACE inhibitors/ angiotensin II receptor blocker
• Group B (6 subjects): placebo for 12 weeks (28 days) as an add-on to any ongoing treatment including ACE inhibitors/ angiotensin II receptor blocker.

Enrollment: 23 estimated patients

Sex: All

Ages: 18 to 85 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Written informed consent has been obtained prior to initiating any study-specific procedures
• Male and female subjects, 18 to 85 years of age diagnosed with iMN within 6 months prior to inclusion
• Diagnosed as anti-PLA2-Receptor positive by local laboratory within 6 months prior to inclusion
• Severe proteinuria defined by a U-protein/creatinine ratio >3.0 g/g and/or U-albumin/creatinine ratio >2.0 g/g and a P-albumin below the lower normal limit
• eGFR > 30 ml/min/1.73m2
• Treated with ACE- inhibitors or angiotensin II receptor blocker for a minimum of 1 months with a stable systemic arterial blood pressure OR treatment with ACE inhibitors and/or angiotensin receptor blocker was excluded or discontinued due to hypotension, intolerance or other side effect

Only Denmark and Norway:

• Females of child-bearing potential using reliable means of contraception or are post-menopausal
• Females of childbearing potential with negative pregnancy test at screening and baseline

Only Sweden:

• Post-menopausal women or women who are surgically sterilized.

Exclusion criteria

• Participation in any other study involving investigational drug(s) during the study and within 4 weeks prior to study entry
• Clinicial findings that in the opinion of the investigator would suggest condition(s) other than iMN as a major cause of severe proteinuria
• Major surgery within 8 weeks prior to screening or planned surgery within 1 month following randomization
• Blood pressure with systolic pressure above 160 mmHg and/or diastolic pressure above 100 mmHg despite antihypertensive treatment will in all cases be considered "uncontrolled"
• Treated with systemic corticosteroids, or other immune suppressive, or immune modulating compounds within 4 weeks prior to screening and during the entire treatment period and until the final visit
• Treated with rituximab within 12 months of screening
• Evidence of active malignant disease
• Uncontrolled disease states, such as asthma, psoriasis, or inflammatory bowel disease where flares are commonly treated with oral or parenteral corticosteroids
• Evidence of serious uncontrolled concomitant cardiovascular, nervous system, pulmonary, renal, hepatic, endocrine or gastrointestinal disease
• Pregnant women or nursing mothers
• History of alcohol, drug, or chemical abuse within the 6 months prior to screening
• Any condition that in the view of the investigator would suggest that the patient is unable to comply with study protocol and procedures

Only Sweden:

• Females of child-bearing potential.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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23 participants in 2 patient groups

100 mg AP1189

Experimental group

Description:

100 mg AP1189. The treatment is a 12-weeks treatment. Each daily dose will be administered as a tablet

Treatment:

Drug: 100 mg AP1189

Placebo

Experimental group

Description:

Placebo. The treatment is a 12-weeks treatment. Each daily dose will be administered as a tablet

Treatment:

Drug: Placebo