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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/ct2/show/NCT05507203




Registration number
NCT05507203
Ethics application status
Date submitted
17/08/2022
Date registered
18/08/2022
Date last updated
17/05/2024

Titles & IDs
Public title
ABTECT-1 - ABX464 Treatment Evaluation for Ulcerative Colitis Therapy -1
Scientific title
A Randomized, Double-blind, Placebo-controlled, Multicenter Phase III Study to Evaluate the Efficacy and Safety of ABX464 Once Daily for Induction Treatment in Subjects With Moderately to Severely Active Ulcerative Colitis
Secondary ID [1] 0 0
ABX464-105
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Ulcerative Colitis 0 0
Condition category
Condition code
Oral and Gastrointestinal 0 0 0 0
Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon
Inflammatory and Immune System 0 0 0 0
Other inflammatory or immune system disorders
Oral and Gastrointestinal 0 0 0 0
Inflammatory bowel disease

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Drugs - ABX464
Treatment: Drugs - Placebo

Experimental: ABX464 50mg - Subjects will be orally dosed daily in a fed condition ideally at the same time in the morning) for 8 weeks

Experimental: ABX464 25mg - Subjects will be orally dosed daily in a fed condition ideally at the same time in the morning) for 8 weeks

Placebo Comparator: Placebo - Subjects will be orally dosed daily in a fed condition ideally at the same time in the morning) for 8 weeks


Treatment: Drugs: ABX464
Administered once daily in the morning with food

Treatment: Drugs: Placebo
Administered once daily in the morning with food

Intervention code [1] 0 0
Treatment: Drugs
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Proportion of subjects who achieve clinical remission per Modified Mayo Score at week 8
Timepoint [1] 0 0
8 weeks
Secondary outcome [1] 0 0
Proportion of subjects who achieve endoscopic improvement at week 8
Timepoint [1] 0 0
8 weeks
Secondary outcome [2] 0 0
Proportion of subjects who achieve clinical response per MMS at week 8
Timepoint [2] 0 0
8 weeks
Secondary outcome [3] 0 0
Proportion of subjects with symptomatic remission at week 8
Timepoint [3] 0 0
8 weeks
Secondary outcome [4] 0 0
Proportion of subjects with HEMI per Geboes at week 8
Timepoint [4] 0 0
8 weeks

Eligibility
Key inclusion criteria
- Men or women at least 16 years old; Adolescent subjects will only be enrolled if
approved by the country regulatory/health authority. If these approvals have not been
granted, only subjects = 18 years old will be enrolled. To be eligible, adolescent
subjects must weight = 40 kg and meet the definition of Tanner Stage 5 at the
screening visit.

- Subjects must understand, sign and date the written voluntary informed consent form at
the visit prior to any protocol-specific procedures. For under-aged subjects, national
requirements regarding consent should also be met.

- Documented diagnosis of UC confirmed by endoscopy and histology. Should
endoscopy/histology results not be available at screening, results from endoscopies or
biopsies taken at screening may be used.

- Active disease defined by modified Mayo score (MMS) = 5 with rectal bleeding subscore
(RBS) = 1 and endoscopy subscore (MES) of 2 or 3 (confirmed by central reader).

- Subjects with documented inadequate response (defined as lack of response or loss of
response or intolerance) to at least one of the following treatments: corticosteroids,
immunosuppressant, biologic or biosimilar therapies, S1P receptor modulators and/or
JAK inhibitors and/or new drugs approved during the study (note: failure to only 5-ASA
or sulfasalazine is not accepted).

- Women of childbearing potential (WOCBP) subjects and male subjects with WOCBP partner
must agree to comply with the contraception requirements described in the protocol.

- Subjects able and willing to comply with study visits and procedures as per protocol.

- Subjects should be affiliated to a health insurance policy whenever required by a
participating country or state.
Minimum age
16 Years
Maximum age
No limit
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
- Subjects with UC limited to an isolated proctitis (= 15cm from anal verge) determined
by endoscopy central reading.

- Subjects with primary sclerosing cholangitis or autoimmune hepatitis.

- Subjects who have failed on 5-ASA or sulfasalazine therapy only.

- Subjects with CD or presence or history of fistula, indeterminate colitis,
infectious/ischemic colitis or microscopic colitis (lymphocytic and collagenous
colitis).

- History or current evidence of toxic megacolon, fulminant colitis, bowel perforation.

- History of colonic cancer or colonic low grade or high grade dysplasia adenomatous
polyps, and/or at the screening endoscopy, evidence of colonic cancer or evidence of
low grade or high grade dysplasia adenomatous polyps (fully removed or not).

- Recent or planned bowel surgery or history of proctocolectomy or partial colectomy or
current stoma.

- Subjects on antidiarrheals including those working on motility (e.g., loperamide,
diphenoxylate with atropine, etc.).

- Subjects on probiotics (e.g., Culturelle® [Lactobacillus GG, i-Health, Inc.],
Saccharomyces boulardii).

- Subjects who do not meet the washout period requirements prior to the screening
endoscopy

- Subjects with the following hematological and biochemical laboratory parameters
obtained during the screening period:

- Hemoglobin = 8.0 g dL-1

- Absolute neutrophil count < 750 mm-3

- Platelets < 100,000 mm-3

- Creatinine clearance < 60 mL.min-1 (Cockroft-Gault formula)

- Total serum bilirubin > 1.5 x ULN

- Alkaline phosphatase, aspartate aminotransferase (AST) and alanine
aminotransferase (ALT) > 2 x ULN

- Subjects with the following conditions (infection):

- Subjects with chronic or recurrent grade 3 or grade 4 infection within the last 2
months prior to screening or a history of opportunistic infection while not on
immunosuppressive therapy.

- Herpes zoster reactivation within the last 2 months prior to screening.

- Subjects with active infection at screening or any major episode of infection
that required hospitalization or treatment with intravenous antibiotics within 1
month of screening or during screening. Fungal infection of nail beds is allowed.

- Positive assay or stool culture for pathogens (ova and parasite examination,
bacteria) or positive test for Clostridium difficile toxin at screening. If C.
difficile is positive, subject may be treated and retested = 2 weeks after
completing treatment.

- Subjects with HIV infection.

- Subjects having acute or chronic hepatitis B infection at screening (positive for
hepatitis B surface antigen [HbsAg], or negative for HbsAg and positive for
anti-hepatitis B core antibody in conjunction with detectable HBV DNA, or
detectable HBV DNA).

- Subjects having acute or chronic hepatitis C infection at screening as defined by
positive for hepatitis C antibody (subjects successfully treated and without
recurrence = 1 year with no detectable HCV RNA [assessed centrally] are
eligible).

- Active tuberculosis (TB) or untreated latent TB are ruled out. For subjects with
positive or intermediate QuantiFERON test see study protocol.

- Subjects with an uncontrolled ischemic heart disease and/or a history of congestive
heart failure with New York Heart Association (NYHA) class 3 or 4 symptoms.

- Subjects with a family or personal history of congenital or acquired long QT syndrome,
or subjects with a marked baseline prolongation of QT/QTc interval (e.g., repeated
demonstration of a QTc interval [Fridericia or Bazett correction] >450 milliseconds
for male and > 460 milliseconds for female).

- Subjects with a history of torsade de pointe (TdP).

- Acute or chronic of clinically relevant pulmonary, hepatic, pancreatic or renal
functional abnormality, encephalopathy, neuropathy or unstable central nervous system
pathology such as seizure disorder, or any other clinically significant medical
problems as determined by physical examination and/or laboratory screening tests
and/or medical history (note: treated autoimmune hypothyroidy and autoimmune diabetes
are allowed).

- Acute or chronic pancreatitis, determined by amylase and/or lipase elevations = 3 ULN
at screening and abnormal imaging results (CT, MRI, or ultrasound) during the
screening period.

- History or active malignancy including non-melanoma skin cancer (subjects with a
5-year disease free survival are eligible).

- Serious illness requiring hospitalization within 4 weeks prior to screening (except UC
flare).

- Subjects previously treated with ABX464.

- Subjects with a known hypersensitivity to the active substance or to any of the
excipients.

- WOCBP subject who is pregnant or breast-feeding at screening, or intends to become
pregnant during the study, or male subject with WOCBP partner who intends to be
pregnant during the study.

- Illicit drug or alcohol abuse or dependence.

- Subjects who received live vaccine within 3 months prior to screening and/or who's
planning to receive such a vaccine during the study duration.

- Use of any investigational or non-registered product within 3 months or within 5
half-lives preceding baseline, whichever is longer, and during the study.

- Subjects committed to an institution by virtue of an order issued either by the
judicial or the administrative authorities.

- Any condition, which in the opinion of the investigator, could compromise the
subject's safety or adherence to the study protocol.

Study design
Purpose of the study
Treatment
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s

The people analysing the results/data
Intervention assignment
Parallel
Other design features
Phase
Phase 3
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Recruiting
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
Accrual to date
Final
Recruitment in Australia
Recruitment state(s)
NSW,QLD,SA,VIC
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Blacktown Hospital - Blacktown
Recruitment hospital [2] 0 0
Concord Repatriation General Hospital - Concord
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Liverpool Hospital - Liverpool
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Royal Brisbane and Women's Hospital - Herston
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Coral Sea Clinical Research Institute - North Mackay
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Princess Alexandra Hospital - Woolloongabba
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Flinders Medical Centre - Bedford Park
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Box Hill Hospital - Box Hill
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St Vincent's Hospital Melbourne - Fitzroy
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Footscray Hospital - Footscray
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Austin Health - Heidelberg
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The Alfred Hospital - Melbourne
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Royal Melbourne Hospital - Parkville
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2139 - Concord
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4029 - Herston
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4740 - North Mackay
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4102 - Woolloongabba
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5042 - Bedford Park
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3128 - Box Hill
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3065 - Fitzroy
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3011 - Footscray
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3084 - Heidelberg
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3004 - Melbourne
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3050 - Parkville
Recruitment outside Australia
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Belfast

Funding & Sponsors
Primary sponsor type
Commercial sector/Industry
Name
Abivax S.A.
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
This is a multicenter, randomized, placebo controlled study to evaluate the efficacy and
safety of ABX464 given at 25 or 50 mg QD in inducing clinical remission in subjects with
moderately to severely active ulcerative colitis who have inadequate response, no response, a
loss of response, or an intolerance to either conventional therapies [corticosteroids,
immunosuppressant (i.e. azathioprine, 6-mercaptopurine, methotrexate)] and/or advanced
therapies [biologics (TNF inhibitors, anti-integrins, anti-IL-23), and/or S1P receptor
modulators, and/or JAK inhibitors].
Trial website
https://clinicaltrials.gov/ct2/show/NCT05507203
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Sharon Skare, CPhil
Address 0 0
Country 0 0
Phone 0 0
+33153830961
Fax 0 0
Email 0 0
sharon.skare@abivax.com
Contact person for scientific queries



Summary Results

For IPD and results data, please see https://clinicaltrials.gov/ct2/show/NCT05507203