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The European Union Clinical Trials Register   allows you to search for protocol and results information on:
  • interventional clinical trials that were approved in the European Union (EU)/European Economic Area (EEA) under the Clinical Trials Directive 2001/20/EC
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    The EU Clinical Trials Register currently displays   43881   clinical trials with a EudraCT protocol, of which   7295   are clinical trials conducted with subjects less than 18 years old.   The register also displays information on   18700   older paediatric trials (in scope of Article 45 of the Paediatric Regulation (EC) No 1901/2006).

    Phase 1 trials conducted solely on adults and that are not part of an agreed paediatric investigation plan (PIP) are not publicly available (see Frequently Asked Questions ).  
    Examples: Cancer AND drug name. Pneumonia AND sponsor name.
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    EudraCT Number:2012-003242-33
    Sponsor's Protocol Code Number:GN28525
    National Competent Authority:UK - MHRA
    Clinical Trial Type:EEA CTA
    Trial Status:Completed
    Date on which this record was first entered in the EudraCT database:2012-09-12
    Trial results View results
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    A. Protocol Information
    A.1Member State ConcernedUK - MHRA
    A.2EudraCT number2012-003242-33
    A.3Full title of the trial
    A.3.1Title of the trial for lay people, in easily understood, i.e. non-technical, language
    A.4.1Sponsor's protocol code numberGN28525
    A.7Trial is part of a Paediatric Investigation Plan No
    A.8EMA Decision number of Paediatric Investigation Plan
    B. Sponsor Information
    B.Sponsor: 1
    B.1.1Name of SponsorGenentech, Inc.
    B.1.3.4CountryUnited States
    B.3.1 and B.3.2Status of the sponsorCommercial
    B.4 Source(s) of Monetary or Material Support for the clinical trial:
    B.4.1Name of organisation providing supportGenentech, Inc.
    B.4.2CountryUnited States
    B.5 Contact point designated by the sponsor for further information on the trial
    B.5.1Name of organisationGenentech Inc., c/o F. Hoffmann-La Roche Ltd.
    B.5.2Functional name of contact pointTrial Information Support Line, TIS
    B.5.3 Address:
    B.5.3.1Street AddressGrenzacherstrasse 124
    B.5.3.2Town/ cityBasel
    B.5.3.3Post code4070
    D. IMP Identification
    D.IMP: 1
    D.1.2 and D.1.3IMP RoleTest
    D.2 Status of the IMP to be used in the clinical trial
    D.2.1IMP to be used in the trial has a marketing authorisation No
    D.2.5The IMP has been designated in this indication as an orphan drug in the Community No
    D.2.5.1Orphan drug designation number
    D.3 Description of the IMP
    D.3.1Product nameCrenezumab
    D.3.2Product code MABT5102A
    D.3.4Pharmaceutical form Concentrate for solution for injection
    D.3.4.1Specific paediatric formulation No
    D.3.7Routes of administration for this IMPIntravenous use
    D.3.8 to D.3.10 IMP Identification Details (Active Substances)
    D.3.8INN - Proposed INNCrenezumab
    D.3.9.1CAS number 1095207-05-8
    D.3.9.2Current sponsor codeMABT5102A
    D.3.10 Strength
    D.3.10.1Concentration unit mg/ml milligram(s)/millilitre
    D.3.10.2Concentration typeequal
    D.3.10.3Concentration number150
    D.3.11 The IMP contains an:
    D.3.11.1Active substance of chemical origin No
    D.3.11.2Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP) Yes
    The IMP is a:
    D.3.11.3Advanced Therapy IMP (ATIMP) No
    D. cell therapy medicinal product No
    D. therapy medical product No
    D. Engineered Product No
    D. ATIMP (i.e. one involving a medical device) No
    D. on Advanced therapies (CAT) has issued a classification for this product No
    D.3.11.4Combination product that includes a device, but does not involve an Advanced Therapy No
    D.3.11.5Radiopharmaceutical medicinal product No
    D.3.11.6Immunological medicinal product (such as vaccine, allergen, immune serum) No
    D.3.11.7Plasma derived medicinal product No
    D.3.11.8Extractive medicinal product No
    D.3.11.9Recombinant medicinal product Yes
    D.3.11.10Medicinal product containing genetically modified organisms No
    D.3.11.11Herbal medicinal product No
    D.3.11.12Homeopathic medicinal product No
    D.3.11.13Another type of medicinal product No
    D.8 Information on Placebo
    E. General Information on the Trial
    E.1 Medical condition or disease under investigation
    E.1.1Medical condition(s) being investigated
    Mild to moderate Alzheimer’s disease
    E.1.1.1Medical condition in easily understood language
    Mild to moderate Alzheimer’s disease
    E.1.1.2Therapeutic area Diseases [C] - Nervous System Diseases [C10]
    MedDRA Classification
    E.1.2 Medical condition or disease under investigation
    E.1.2Version 18.0
    E.1.2Level LLT
    E.1.2Classification code 10001896
    E.1.2Term Alzheimer's disease
    E.1.2System Organ Class 100000004852
    E.1.3Condition being studied is a rare disease No
    E.2 Objective of the trial
    E.2.1Main objective of the trial
    To assess the long-term safety and tolerability of crenezumab administered subcutaneously (SC) every 2 weeks (q2w) or intravenously (IV) every 4 weeks (q4w), in eligible patients with Alzheimer’s disease who participated in Study ABE4869g or ABE4955g and completed the Week 73 study visit, including brain MRI.
    E.2.2Secondary objectives of the trial
    To evaluate the long term effect of crenezumab on disease progression and evaluation of:
    • the pharmacokinetic (PK) and pharmacodynamic (PD) characteristics of crenezumab
    • the PK/PD relationship of crenezumab using exploratory PD biomarkers
    • changes in MRI biomarkers, such as global and regional brain volumes and functional connectivity
    E.2.3Trial contains a sub-study No
    E.3Principal inclusion criteria
    • Ability to provide written informed consent by the patient or the patient’s authorized representative under applicable local law
    • Ability and willingness of the patient to comply with the protocol’s requirements
    • Previous participation in Study ABE4869g or ABE4955g and completion of the Week 73 visit
    – Patients who discontinued from study treatment or from the study prior to completion of the Week 73 visit are not eligible.
    • Adequate visual and auditory acuity, in the investigator's judgment, to allow for neuropsychological testing
    • Availability of a person ("caregiver") who can provide information on activities of daily living and behavior in order to complete the study-specific assessments
    – This caregiver must have sufficient cognitive capacity, in the judgment of the investigator, to accurately report upon the patient's function and behavior. In addition, the caregiver must spend sufficient time with the patient to be familiar with the overall function and behavior of the patient. As guidance, a caregiver would ordinarily need to spend an average of at least 8 hours per week with the patient in order for the caregiver to meet the requirements for this study.
    • Diagnosis of probable Alzheimer’s disease according to the National Institute on Neurological and Communication Disease and Stroke/Alzheimer’s Disease and Related Disorders Association (NINCDS-ADRDA) criteria (McKhann et al. 1984)
    • MMSE score of 10 or more at screening (Folstein et al. 1975)
    • For male patients with partners with reproductive potential, agreement to use a reliable means of contraception (e.g., condoms) during the study
    • For female patients, a negative urine dipstick pregnancy test at screening (not required if patient has undergone documented surgical sterilization or have not experienced menstruation for at least 12 consecutive months).
    E.4Principal exclusion criteria
    • Early treatment and/or study discontinuation prior to completion of the Week 73 visit of Genentech Study ABE4869g or ABE4955g
    • Inability to tolerate MRI procedures or contraindication to MRI, including but not limited to pacemakers; implantable cardioverter defibrillators; cochlear implants; cerebral aneurysm clips; implanted infusion pumps; implanted nerve stimulators; metallic splinters in the eye; other magnetic, electronic, or mechanical implants; or any other clinical history or examination finding that, in the judgment of the investigator, would pose a potential hazard in combination with MRI
    • Female patient with reproductive potential: Female patients must either have undergone documented surgical sterilization or have not experienced menstruation for at least 12 consecutive months.
    • Severe or unstable medical condition that, in the opinion of the investigator or Sponsor, would interfere with the patient's ability to complete the study assessments or would require the equivalent of institutional or hospital care
    • History or presence of clinically evident vascular disease potentially affecting the brain
    • History of severe, clinically significant (persistent neurologic deficit or structural brain damage) central nervous system trauma (e.g., cerebral contusion)
    • History or presence of clinically relevant intracranial tumor (e.g., meningioma, glioma)
    • Presence of infections that affect the brain function or history of infections that resulted in neurologic sequelae (e.g., syphilis, neuroborreliosis, viral or bacterial meningitis/encephalitis, HIV encephalopathy)
    • History or presence of systemic autoimmune disorders potentially causing progressive neurologic disease (e.g., multiple sclerosis, lupus erythematosus, anti-phospholipid antibody syndrome, Behçet disease)
    • History or presence of a neurologic disease other than Alzheimer’s disease that may affect cognition, including but not limited to Parkinson’s disease, corticobasal degeneration, dementia with Lewy bodies, Creutzfeldt–Jakob disease, progressive supranuclear palsy, frontotemporal degeneration, Huntington’s disease, normal pressure hydrocephalus, and hypoxia
    • Patients with medical conditions (including Alzheimer's Disease) that, in the opinion of the investigator or Sponsor, would interfere with the patient's ability to complete the study assessments, pose an unacceptable risk, or would require the equivalent of institutional or hospital care
    • History of severe allergic, anaphylactic, or other hypersensitivity reactions to chimeric, human, or humanized antibodies or fusion proteins
    • Evidence of malignancies (except squamous cell cancer or basal cell cancer of the skin), acute infections, renal failure that requires dialysis, or other unstable medical disease not related to Alzheimer’s disease that, in the investigator’s opinion, would preclude patient participation
    – Cancer that is not being actively treated with anti-cancer therapy or radiotherapy as well as cancers that are considered to have low probability of recurrence (with supporting documentation from the treating oncologist if possible) are allowed
    • History or presence of atrial fibrillation that, in the investigator’s judgment, poses a risk for future stroke
    • Chronic kidney disease of Stage ≥ 4, according to the National Kidney Foundation Kidney Disease Outcomes Quality Initiative (NKF KDOQI) guidelines for chronic kidney disease (CKD)
    • Impaired hepatic function, as indicated by transaminases > 2 times the upper limit of normal (ULN) or abnormalities in synthetic function tests judged by the investigator to be clinically significant
    • Impaired coagulation (aPTT > 1.2 × ULN)
    • Platelet count < 100,000/μL
    • Presence of superficial siderosis of central nervous system, more than eight cerebral microhemorrhages, or evidence of a prior cerebral macrohemorrhage as assessed by T2*-weighted gradient echo (GRE) MRI
    • Presence of any other significant cerebral abnormalities, including ARIA-E, as assessed by MRI
    • Treatment with anticoagulation medications (e.g., heparin, warfarin, thrombin inhibitors, Factor Xa inhibitors) within 2 weeks prior to enrollment
    – Clopidogrel, dipyridamole, and aspirin are permitted.
    •Treatment with anticholinergic antidepressants, typical antipsychotics, or barbiturates, within 2 weeks prior to enrollment.
    • Chronic use of opiates, opioids, or benzodiazepines
    • Any biologic therapy within 75 weeks prior to enrollment
    • Any investigational agent (other than crenezumab) within 75 weeks
    prior to enrollment
    • Treatment with anticholinergic antidepressants, typical antipsychotics, barbiturates, or narcotics within 5 half-lives or 3 months prior to screening, whichever is longer
    – All other antidepressants and atypical antipsychotics are allowed. Chronic use of benzodiazepines is not allowed; however, the intermittent use of benzodiazepines is allowed, except within 2 days prior to any neurocognitive assessment.
    E.5 End points
    E.5.1Primary end point(s)
    Safety and tolerability will be assessed through regular neurologic and physical examinations
    and MRI assessments. In addition, the following information will be collected and analyzed:
    • Frequency of adverse events during the treatment period
    • Nature and severity of adverse events during the treatment period
    • Changes in vital signs and physical and neurological findings
    • Changes in clinical laboratory test results including routine hematology, chemistry, coagulation, and urinalysis
    • Incidence of human anti-therapeutic antibody (ATA) formation
    • Incidence of ARIA-E and amyloid-related imaging abnormalities-hemorrhage (ARIA-H)
    The end of this study is defined as the date when the last patient, last visit (LPLV) occurs or the
    date on which the last data point required for statistical analysis or safety follow-up is received
    from the last patient, whichever occurs later.
    E.5.1.1Timepoint(s) of evaluation of this end point
    153 weeks after the last patient is enrolled.
    E.5.2Secondary end point(s)
    The exploratory outcome measures for this study are as follows:
    • Change in ADAS-Cog (12-item) score from baseline to Week 153
    • Change in CDR-SOB score from baseline to Week 153
    • Change in ADCS-ADL score from baseline to Week 153
    • Change in the following ENTP scores from baseline to Week 153:
    – Free and Cued Selective Reminding Test (FCSRT)
    – Trail-Making Test (TMT)
    – Digit Span Test (DST)
    – Digit Symbol Substitution Test (DSST)
    – Letter Fluency Test (LFT)
    – Category Fluency Test (CFT)
    • Change in NPI score from baseline to Week 153
    • Change in NPI Caregiver Distress Scale score from baseline to Week 153
    • Change in Dependence Scale total score from baseline to Week 153
    • Changes in MRI biomarkers, such as global and regional brain volumes, from baseline to Week 153
    • Serum crenezumab concentration at protocol-specified time points; PK parameters including trough serum concentrations at steady state (Ctrough, ss) will be explored, as applicable
    • Plasma Abeta1-40 and Abeta1-42 concentrations
    E.5.2.1Timepoint(s) of evaluation of this end point
    Week 153
    E.6 and E.7 Scope of the trial
    E.6Scope of the trial
    E.6.1Diagnosis No
    E.6.2Prophylaxis No
    E.6.3Therapy Yes
    E.6.4Safety Yes
    E.6.5Efficacy No
    E.6.6Pharmacokinetic Yes
    E.6.7Pharmacodynamic Yes
    E.6.8Bioequivalence No
    E.6.9Dose response No
    E.6.10Pharmacogenetic No
    E.6.11Pharmacogenomic No
    E.6.12Pharmacoeconomic No
    E.6.13Others No
    E.7Trial type and phase
    E.7.1Human pharmacology (Phase I) No
    E.7.1.1First administration to humans No
    E.7.1.2Bioequivalence study No
    E.7.1.3Other No
    E. trial type description
    E.7.2Therapeutic exploratory (Phase II) Yes
    E.7.3Therapeutic confirmatory (Phase III) No
    E.7.4Therapeutic use (Phase IV) No
    E.8 Design of the trial
    E.8.1Controlled No
    E.8.1.1Randomised No
    E.8.1.2Open Yes
    E.8.1.3Single blind No
    E.8.1.4Double blind No
    E.8.1.5Parallel group No
    E.8.1.6Cross over No
    E.8.1.7Other No
    E.8.2 Comparator of controlled trial
    E.8.2.1Other medicinal product(s) No
    E.8.2.2Placebo No
    E.8.2.3Other No
    E.8.3 The trial involves single site in the Member State concerned No
    E.8.4 The trial involves multiple sites in the Member State concerned Yes
    E.8.4.1Number of sites anticipated in Member State concerned8
    E.8.5The trial involves multiple Member States Yes
    E.8.5.1Number of sites anticipated in the EEA32
    E.8.6 Trial involving sites outside the EEA
    E.8.6.1Trial being conducted both within and outside the EEA Yes
    E.8.6.2Trial being conducted completely outside of the EEA No
    E.8.6.3If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned
    United Kingdom
    United States
    E.8.7Trial has a data monitoring committee No
    E.8.8 Definition of the end of the trial and justification where it is not the last visit of the last subject undergoing the trial
    LVLS or the date on which the last data point required for statistical analysis or safety follow-up is received from the last patient, whichever occurs later.
    E.8.9 Initial estimate of the duration of the trial
    E.8.9.1In the Member State concerned years3
    E.8.9.1In the Member State concerned months1
    E.8.9.1In the Member State concerned days
    E.8.9.2In all countries concerned by the trial years3
    E.8.9.2In all countries concerned by the trial months1
    F. Population of Trial Subjects
    F.1 Age Range
    F.1.1Trial has subjects under 18 No
    F.1.1.1In Utero No
    F.1.1.2Preterm newborn infants (up to gestational age < 37 weeks) No
    F.1.1.3Newborns (0-27 days) No
    F.1.1.4Infants and toddlers (28 days-23 months) No
    F.1.1.5Children (2-11years) No
    F.1.1.6Adolescents (12-17 years) No
    F.1.2Adults (18-64 years) Yes
    F.1.2.1Number of subjects for this age range: 70
    F.1.3Elderly (>=65 years) Yes
    F.1.3.1Number of subjects for this age range: 280
    F.2 Gender
    F.2.1Female Yes
    F.2.2Male Yes
    F.3 Group of trial subjects
    F.3.1Healthy volunteers No
    F.3.2Patients Yes
    F.3.3Specific vulnerable populations Yes
    F.3.3.1Women of childbearing potential not using contraception No
    F.3.3.2Women of child-bearing potential using contraception Yes
    F.3.3.3Pregnant women No
    F.3.3.4Nursing women No
    F.3.3.5Emergency situation No
    F.3.3.6Subjects incapable of giving consent personally Yes
    F. of subjects incapable of giving consent
    Alzheimer's Patients
    F.3.3.7Others No
    F.4 Planned number of subjects to be included
    F.4.1In the member state36
    F.4.2 For a multinational trial
    F.4.2.1In the EEA 50
    F.4.2.2In the whole clinical trial 350
    F.5 Plans for treatment or care after the subject has ended the participation in the trial (if it is different from the expected normal treatment of that condition)
    G. Investigator Networks to be involved in the Trial
    N. Review by the Competent Authority or Ethics Committee in the country concerned
    N.Competent Authority Decision Authorised
    N.Date of Competent Authority Decision2012-10-09
    N.Ethics Committee Opinion of the trial applicationFavourable
    N.Ethics Committee Opinion: Reason(s) for unfavourable opinion
    N.Date of Ethics Committee Opinion2012-11-30
    P. End of Trial
    P.End of Trial StatusCompleted
    P.Date of the global end of the trial2017-02-08
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    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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