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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/NCT03283826




Registration number
NCT03283826
Ethics application status
Date submitted
13/09/2017
Date registered
14/09/2017
Date last updated
23/02/2024

Titles & IDs
Public title
Phase 1/2 Study to Evaluate the Safety and Efficacy of ATA188 in Subjects With Progressive Multiple Sclerosis
Scientific title
A Phase 1/2, Two-part, Open-label Dose-escalation and Double-blind, Placebo-controlled Dose-expansion Study With an Open-label Extension to Evaluate the Safety and Efficacy of ATA188 in Subjects With Progressive Multiple Sclerosis
Secondary ID [1] 0 0
ATA188-MS-101
Universal Trial Number (UTN)
Trial acronym
EMBOLD
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Primary Progressive Multiple Sclerosis 0 0
Secondary Progressive Multiple Sclerosis 0 0
Condition category
Condition code

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Other interventions - ATA188
Treatment: Drugs - Placebo

Experimental: ATA188 - Participants in Parts 1 and 2 will receive ATA188 intravenously as described in the Detailed Description.

Placebo Comparator: Placebo - Participants in Part 2 will receive placebo matching to ATA188 intravenously as described in the Detailed Description (i.e., will receive placebo only in the first year, and thereafter will receive ATA188 for the remainder of the study).


Other interventions: ATA188
ATA188 is being investigated as an off-the-shelf, allogeneic T-cell immunotherapy for the treatment of EBV+ progressive multiple sclerosis.

Treatment: Drugs: Placebo
Placebo matching to ATA188
Intervention code [1] 0 0
Other interventions
Intervention code [2] 0 0
Treatment: Drugs
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Part 1: Incidence of adverse events
Timepoint [1] 0 0
At 12 months after the first dose of study drug
Primary outcome [2] 0 0
Part 1: Incidence of clinically significant changes in laboratory tests, electrocardiograms (ECGs), and vital signs
Timepoint [2] 0 0
At 12 months after the first dose of study drug
Primary outcome [3] 0 0
Part 1: Recommended Part 2 dose of ATA188 monotherapy
Timepoint [3] 0 0
Day 1 to Day 35 of Cycle 1 for each participant in dose escalation part (approximately 1 year)
Primary outcome [4] 0 0
Part 2: Percentage of participants with confirmed expanded disability status scale (EDSS) improvement at 12 months
Timepoint [4] 0 0
At 12 months after the first dose of study drug
Secondary outcome [1] 0 0
Part 1: Change from baseline in EDSS score
Timepoint [1] 0 0
At 12 months after the first dose of study drug
Secondary outcome [2] 0 0
Part 2: Percentage of participants with confirmed EDSS improvement at 15 months
Timepoint [2] 0 0
At 15 months after the first dose of study drug
Secondary outcome [3] 0 0
Part 2: Percentage of participants with sustained disability improvement (SDI; ie, confirmed EDSS improvement or 20% decrease in timed 25-foot walk [T25W]) at 12 months
Timepoint [3] 0 0
At 12 months after the first dose of study drug
Secondary outcome [4] 0 0
Part 2: Percentage of participants with SDI at 15 months
Timepoint [4] 0 0
At 15 months after the first dose of study drug
Secondary outcome [5] 0 0
Part 2: Change from baseline in immunoglobulin G (IgG) index
Timepoint [5] 0 0
At 9 months after the first dose of study drug

Eligibility
Key inclusion criteria
- For Part 1: History of progressive forms of MS (PPMS or SPMS), as defined by the 2010
Revised McDonald criteria for the diagnosis of MS

- For Part 1: 18 to < 66 years of age

- For Part 1: EDSS scores of 3.0 to 7.0. Participants with EDSS scores of 6.5 to 7.0
must retain measurable upper limb function as assessed by the 9-hole Peg Test (9HPT).

- For Part 2: Current diagnosis of a progressive form of MS (PPMS or SPMS) as defined by
the 2017 Revised McDonald criteria

- For Part 2:18 to < 61 years of age

- For Part 2:EDSS scores of 3.0 to 6.5

- Positive EBV serology

- Willing and able to provide written informed consent
Minimum age
18 Years
Maximum age
60 Years
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
- Clinical relapse as follows: For Part 1: Active clinical relapse between providing
informed consent and the first dose of study drug. For Part 2: Documented clinical
and/or radiological relapse for 2 years prior to screening, including gadolinium
(Gd)-enhancing lesion(s) on any brain MRI scans available during this period (A
participant will also be considered ineligible if any clinical and/or radiological
relapse is reported between screening and the first dose of study drug.)

- Concurrent serious uncontrolled or unresolved medical condition, such as infection,
limiting protocol compliance or exposing the subject to unacceptable risk

- Positive serology and/or nucleic acid testing (NAT) for human immunodeficiency virus
(HIV), active hepatitis B virus (HBV) infection or carrier status for HBV, active
hepatitis C virus (HCV) infection

- For Part 1: Positive serology for syphilis or human T cell lymphotrophic virus I/II

- Uncontrolled psychosis, uncontrolled depression or suicide risk, substance dependence,
or any other psychiatric condition that may compromise the ability to participate in
this trial

- Clinically significant abnormalities of full blood count, renal function, or hepatic
function

- Any contraindication to MRI and/or Gd, eg., any object that is reactive to strong
static magnetic, pulsed-gradient fields including any metallic fragments or foreign
body (eg, aneurysm clip[s], pacemakers, electronic implants, shunts)

- Any history of cancer (as exceptions, successfully treated non-melanoma skin cancer or
carcinoma in situ of the cervix with a < 5% chance of recurrence within 12 months of
providing informed consent are allowed.)

- Prior therapy with corticosteroids (within 2 weeks before Cycle 1 Day 1)

- Prior therapy (30 days) B-cell depleting agent (eg, anti-CD20 agents such as
ocrelizumab); participant must be progressing despite therapy to be eligible

- For Part 1: Prior therapy (6 half-lives or 30 days whichever is longer) with
cladribine, glatiramer acetate, interferon ß, dimethyl fumarate, methotrexate,
azathioprine, cyclosporine, fingolimod, natalizumab, teriflunomide, mitoxantrone,
cyclophosphamide, any other immunosuppressant or cytotoxic therapy (other than
steroids), antithymocyte globulin or similar anti-T-cell antibody therapy, or any
other investigational product

- For Part 1: Any previous treatment with alemtuzumab, ablative stem cell transplant, or
EBV T-cell therapy

- For Part 2: Prior therapy (6 half-lives or 30 days whichever is longer) with IV
immunoglobin, plasmapheresis, Bruton's tyrosine kinase inhibitors, all sphingosine
1-phosphate receptor modulators (eg, fingolimod), glatiramer acetate, interferon ß,
nuclear factor (erythroid-derived 2)-like 2 (Nrf2) activators (eg, dimethyl fumarate),
methotrexate, azathioprine, cyclosporine, natalizumab, teriflunomide, mitoxantrone,
cyclophosphamide, any other immunosuppressant or cytotoxic therapy (other than
steroids), antithymocyte globulin or similar anti-T-cell antibody therapy, or any
other investigational product

- For Part 2: Any previous treatment with cladribine, alemtuzumab, ablative stem cell
transplant, or EBV T-cell therapy

- Unresolved reactions from previous therapies that may, in the investigator's opinion,
impact the safety of the participant or the conduct of this study

- Unwilling to use protocol specified contraceptive methods

- Women who are breastfeeding

- Pregnancy

- Inability or unwillingness to comply with study procedures

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 analysing the results/data
Intervention assignment
Other
Other design features
Phase
Phase 1/Phase 2
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Terminated
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
19/10/2017
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
17/01/2024
Sample size
Target
Accrual to date
Final
134
Recruitment in Australia
Recruitment state(s)
NSW,QLD
Recruitment hospital [1] 0 0
Liverpool Hospital - Liverpool
Recruitment hospital [2] 0 0
Royal Brisbane and Women's Hospital - Brisbane
Recruitment hospital [3] 0 0
Griffith University, School of Medicine - Southport
Recruitment postcode(s) [1] 0 0
2170 - Liverpool
Recruitment postcode(s) [2] 0 0
4029 - Brisbane
Recruitment postcode(s) [3] 0 0
4222 - Southport
Recruitment outside Australia
Country [1] 0 0
United States of America
State/province [1] 0 0
California
Country [2] 0 0
United States of America
State/province [2] 0 0
Colorado
Country [3] 0 0
United States of America
State/province [3] 0 0
Florida
Country [4] 0 0
United States of America
State/province [4] 0 0
Indiana
Country [5] 0 0
United States of America
State/province [5] 0 0
Kansas
Country [6] 0 0
United States of America
State/province [6] 0 0
Louisiana
Country [7] 0 0
United States of America
State/province [7] 0 0
Massachusetts
Country [8] 0 0
United States of America
State/province [8] 0 0
Missouri
Country [9] 0 0
United States of America
State/province [9] 0 0
New York
Country [10] 0 0
United States of America
State/province [10] 0 0
North Carolina
Country [11] 0 0
United States of America
State/province [11] 0 0
Pennsylvania
Country [12] 0 0
United States of America
State/province [12] 0 0
South Carolina
Country [13] 0 0
United States of America
State/province [13] 0 0
Tennessee
Country [14] 0 0
United States of America
State/province [14] 0 0
Texas
Country [15] 0 0
United States of America
State/province [15] 0 0
Virginia
Country [16] 0 0
United States of America
State/province [16] 0 0
Washington
Country [17] 0 0
United States of America
State/province [17] 0 0
Wisconsin
Country [18] 0 0
Canada
State/province [18] 0 0
British Columbia
Country [19] 0 0
Canada
State/province [19] 0 0
Ontario
Country [20] 0 0
Canada
State/province [20] 0 0
Quebec

Funding & Sponsors
Primary sponsor type
Commercial sector/Industry
Name
Atara Biotherapeutics
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
The purpose of this study is to evaluate the safety and tolerability of ATA188 as a
monotherapy in Parts 1 and 2, to determine the recommended Part 2 dose (RP2D) of ATA188 as
monotherapy in Part 1, and to evaluate the effect of ATA188 treatment on clinical disability,
as assessed by confirmed Expanded Disability Status Scale (EDSS) improvement at 12 months in
Part 2 in participants with progressive forms of multiple sclerosis (MS) (primary progressive
multiple sclerosis [PPMS] and secondary progressive multiple sclerosis [SPMS]).
Trial website
https://clinicaltrials.gov/ct2/show/NCT03283826
Trial related presentations / publications
Pender MP, Csurhes PA, Smith C, Beagley L, Hooper KD, Raj M, Coulthard A, Burrows SR, Khanna R. Epstein-Barr virus-specific adoptive immunotherapy for progressive multiple sclerosis. Mult Scler. 2014 Oct;20(11):1541-4. doi: 10.1177/1352458514521888. Epub 2014 Feb 3.
Pender MP, Csurhes PA, Burrows JM, Burrows SR. Defective T-cell control of Epstein-Barr virus infection in multiple sclerosis. Clin Transl Immunology. 2017 Jan 20;6(1):e126. doi: 10.1038/cti.2016.87. eCollection 2017 Jan. Erratum In: Clin Transl Immunology. 2017 Jun 16;6(6):e147.
Public notes

Contacts
Principal investigator
Name 0 0
Kiren Kresa-Reahl, MD
Address 0 0
Atara Biotherapeutics
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries



Summary Results

For IPD and results data, please see https://clinicaltrials.gov/ct2/show/NCT03283826