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CompletedNCT04829435MADUpdated Jul 1, 2021

Study 102: Multiple Ascending Dose Study of ALLN-346 (Engineered Urate Oxidase)

A Phase 1 interventional study of ALLN-346 and Placebo in Hyperuricemia and Gout, sponsored by Allena Pharmaceuticals. Completed at 1 site in United States. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-07-01.

Sponsored by Allena Pharmaceuticals · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Jun 2021, 5 years 5 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
18
Allocation
Randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

The purpose of this Phase I study is to evaluate the safety and tolerability of ALLN-346 in in normal healthy volunteers, in an ascending dose design.

ALLN-346 is an (oral) enzyme that specifically degrades urate in the intestinal tract.

Read the detailed description

This is a Phase I, 7-day, randomized, double-blind, placebo-controlled, multiple ascending dose study of orally administered ALLN-346 in normal healthy volunteers. Study will take place at a clinical pharmacology unit (CPU). Two sequential cohorts will be dosed and followed for safety through Day 28.

The study will evaluate safety and tolerability (including inflammation and immunogenicity), and pharmacodynamics of ALLN-346.

02

Conditions studied

  • Hyperuricemia
  • Gout

Browse trials for

03

In context

Hyperuricemia

240 studies on the registry are indexed under Hyperuricemia; 44 are open to participants now.

This study's enrollment of 18 is below the median of 68 across 193 interventional studies indexed under Hyperuricemia.

Browse Hyperuricemia studies →

Lead sponsor

Allena Pharmaceuticals is the lead sponsor of 12 studies on the registry; none are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or female, age 18 to 55 years
  • Incapable of pregnancy, not nursing, and agrees to use an effective method of ; males subjects must agree to abstain from sperm donation
  • Good general health as determined by medical history and physical examination
  • Normal clinical laboratory test results and

Exclusion criteria

Exclusion Criteria:

  • Presence or history of any significant cardiovascular, gastrointestinal, hepatic, renal, pulmonary, hematologic, endocrine, immunologic, dermatologic, neurological, psychiatric disease or history of hyperuricemia
  • Any other condition (including surgery) known to interfere with the absorption, distribution, metabolism, or excretion of medicines
  • Positive screen results for drugs of abuse, alcohol, or cotinine or recent history of drug or alcohol abuse, or positive COVID-19 test
  • abnormal findings on physical examination, vital signs or on (ECG)
  • Positive test result for surface antigen, virus antibody, or (HIV) antibody
  • Received treatment with or exposure to an drug or device within 30 days prior to or during Screening
  • Prior dosing in ALLN-346 clinical study
  • Per Investigator judgment, is not an ideal clinical study candidate
Terms in these criteria, in plain language(7)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
18 participants (actual)

Study arms

  • Experimental
    ALLN-346 (Engineered Urate Oxidase)

    ALLN-346 is novel urate oxidase provided as capsules for oral administration. Two ascending dose cohorts: Cohort A (3 capsules thrice daily (TID) for a total of 9 capsules per day) and Cohort B (5 capsules thrice daily (TID) for a total of 15 capsules per day) will be evaluated for 7 days for each cohort.

    Drug: ALLN-346

  • Placebo comparator
    Placebo

    Matching placebo capsules for oral administration. Two ascending dose cohorts: Cohort A (3 capsules thrice daily (TID) for a total of 9 capsules per day) and Cohort B (5 capsules thrice daily (TID) for a total of 15 capsules per day) will be evaluated for 7 days for each cohort.

    Drug: Placebo

Interventions

  • ALLN-346 (Engineered Urate Oxidase) is an orally administered, novel urate oxidase; provided as capsules for oral administration; It is a proprietary enzyme designed to degrade urate in the intestinal tract

    Also known as: Engineered urate oxidase

  • DrugPlacebo

    Matched placebo capsules are similar in weight and appearance to the ALLN-346 capsules

    Also known as: Matching placebo capsule

06

What researchers measure

Primary outcomes

  1. Incidence of Treatment Emergent Adverse Events (TEAEs)

    Number of of participants with treatment emergent adverse events

    Time frame: 28 days

Secondary outcomes

  1. Serum ALLN-346

    Change of serum concentration of ALLN-346 (ng/mL) and uricase activity (mU/mL)

    Time frame: 8 days

07

Study locations

1 site
  • Medpace Clinical Pharmacology
    Cincinnati, Ohio 45227, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 1, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04829435
Lead sponsor
Allena Pharmaceuticals
Responsible party
Sponsor
First posted
Apr 2, 2021
Start date
Apr 21, 2021
Primary completion
Jun 1, 2021
Completion
Jun 1, 2021
Last update
Jul 1, 2021

Study contacts

Christine Tosone, MS, RAC
study director · Allena Pharmaceuticals, Inc.

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2021. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: ALLN-346

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