The SEAPORT 1 Study: Evaluation of the Safety and Tolerability of INZ-701 in Adults With End-Stage Kidney Disease Undergoing Hemodialysis

NCT ID: NCT06283589

Last Updated: 2025-02-05

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 11 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2024-02-12
• Study Completion Date: 2024-12-13

Brief Summary

The purpose of this study is to determine if multiple doses of INZ-701, given once per week over 4 weeks are safe and increase pyrophosphate (PPi) levels in hemodialysis-dependent (HD) end stage kidney disease (ESKD) study participants who have low PPi levels. In addition, the effect of hemodialysis on the pharmacokinetics of INZ-701 and PPi levels will be evaluated.

Detailed Description

INZ-701 is an ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) recombinant fusion protein in development for the treatment of calciphylaxis. The SEAPORT 1 (INZ701-401) Study is a Phase 1, open-label study to evaluate the safety, pharmacokinetics (PK), and pharmacodynamics (PD) of multiple doses of INZ-701 in study participants aged >18 to < 70 years with HD-dependent ESKD. Anticipated enrollment in the study is up to 10 study participants. The purpose of this study is to determine if INZ-701 increases PPi levels, as well as assess the PK/ PD characteristics of INZ-701 in patients with clinically low PPi levels.

The study will consist of a Screening Period lasting up to 30 days, a Treatment and Assessment Period lasting 26 days, an End of Study (EOS) Visit 30- or 60- days after the last dose of INZ-701, , and a Follow-Up Period lasting up to 365 days after the last dose During the Follow-Up Period, safety, PPi, ENPP1 activity, anti-drug antibodies (ADA) assessments, and genetic testing will be conducted. Participants may be followed for > 1 year if they have increasing ADA titers or have serious adverse events (SAEs) related to ADAs as determined by the Sponsor

Conditions

Calciphylaxis

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

INZ-701

The study consists of a 26-day treatment period where the dose of INZ-701 will be 1.8 mg/kg once weekly. INZ-701 will be administered as a subcutaneous injection once weekly for 4 weeks on Days 3, 10, 17, and 24. The study participant's post-hemodialysis body weight on Day 1 will be used to calculate the dose to be administered.

Group Type: EXPERIMENTAL

INZ-701

Intervention Type: DRUG

Recombinant fusion protein that contains the extracellular domains of human ENPP1 coupled with an Fc fragment from an immunoglobulin gamma-1 (IgG1) antibody.

Interventions

INZ-701

Recombinant fusion protein that contains the extracellular domains of human ENPP1 coupled with an Fc fragment from an immunoglobulin gamma-1 (IgG1) antibody.

Intervention Type: DRUG

Other Intervention Names

(rhENPP1-Fc).

Eligibility Criteria

Inclusion Criteria

1. Study participants must provide written or electronic consent after the nature of the study has been explained, and prior to any research-related procedures, per International Council for Harmonisation (ICH) Good Clinical Practice (GCP)

2. Have ESKD and are receiving HD treatment

3. Are compliant with receiving 3 treatments of HD per week with a functioning arteriovenous (AV) fistula, AV graft, or central venous catheter

4. PPi level <700 nmol/L at Screening

5. Must be willing and able to comply with the diet prescribed by their treating physician and/or the Investigator

6. Male or female aged >18 years to <70 years

7. Women of child-bearing potential (WOCBP) as defined in Clinical Trials Coordination Group (CTFG 2020) and provided in Appendix B, must have a negative serum pregnancy test at Screening and within 3 days of INZ-701 administration

8. WOCBP and partners of fertile males who are WOCBP must be using or agree to use one highly effective form of contraception (per CTFG 2020) and a barrier method from at least 1 month before the first dose of INZ-701 to 30 days after the last dose (greater than 5 half-lives of INZ-701). WOCBP and partners of fertile males who are WOCBP must also agree to not donate ova from the time of the first INZ-701 dose to 30 days after the last dose.

9. Males who are sexually active must agree to use condoms from the time of the first INZ-701 dose to 30 days after the last dose. Males must also agree to not donate sperm from the time of the first INZ-701 dose to 30 days after the last dose.

10. In the opinion of the Investigator, study participants are able and willing to complete all study procedures per protocol.

Exclusion Criteria

1. Study participants receiving other types of dialysis than HD (eg, peritoneal dialysis, hemodiafiltration)

2. Study participants who are hospitalized

3. In the opinion of the Investigator, presence of any clinically significant disease or laboratory abnormality that may impact study participation and/or confound interpretation of the study results

4. Malignancy within the last year, except non-melanoma skin cancers or cervical carcinoma in situ

5. Advanced liver disease manifesting as liver cirrhosis

6. Myocardial infarction, stroke, or congestive heart failure requiring hospitalization within the last 6 months

7. Known intolerance to INZ-701 or any of its excipients

8. Weight >125 kg

9. Concurrent participation in another interventional clinical study and/or receipt of any other investigational new drug within 5 half-lives of the last dose of the other investigational product or from 4 weeks prior to the first dose of INZ-701, whichever is longer, or use of an investigational device, through completion of participation in the study

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 69 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Inozyme Pharma

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Kurt Gunter, MD

Role: STUDY_DIRECTOR

Inozyme Pharma

Locations

South Florida Nephrology Research

Coral Springs, Florida, United States

Elixia Health

Hollywood, Florida, United States

Countries

United States

Other Identifiers

INZ701-401

Identifier Type: -

Identifier Source: org_study_id