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CompletedNCT04111666Updated Aug 10, 2022

A Phase 1 First in Human Study to Assess Safety and Tolerability of AL101

A Phase 1 interventional study of AL101 and Placebo in Healthy, sponsored by Alector Inc.. Completed at 2 sites in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-08-10.

Sponsored by Alector Inc. · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Jun 2022, 4 years 3 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
88
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

A first in human phase 1 study in healthy volunteers to assess AL101 safety, tolerability, bioavailability, pharmacokinetics, and pharmacodynamics

Read the detailed description

This is a first-in-human Phase 1 study designed to investigate the safety, tolerability, PK, PD and Bioavailability of intravenously and sub-cutaneously administered AL101 in Healthy Volunteers.

02

Conditions studied

  • Healthy
03

In context

Lead sponsor

Alector Inc. is the lead sponsor of 10 studies on the registry; none are open to participants now.

Of its 10 completed or terminated interventional studies of FDA-regulated products, 5 (50%) have results posted.

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

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • BMI 18.0-35.0 kg/m2
  • 45-120 kg, inclusive
  • At screening, females must be non-pregnant and non-lactating, or of nonchildbearing potential (either surgically sterilized or physiologically incapable of becoming pregnant, or at least 1-year postmenopausal (amenorrhoea duration of 12 consecutive months); nonpregnancy will be confirmed for all females by a pregnancy test conducted at screening, (each) admission, and at follow-up.
  • Female participants of child-bearing potential must agree to use adequate contraception from screening until 90 days after the follow-up visit.
  • In good physical health on the basis of no clinically significant findings from medical history, physical examination (PE), laboratory tests, 12 lead ECG, and vital signs, as judged by the Investigator.
  • Willingness and able to comply with the study protocol, in the investigator's judgement.

Exclusion criteria

Exclusion Criteria:

  • Known history of severe allergic, anaphylactic, or other hypersensitivity reactions to chimeric, human, or humanized antibodies or fusion proteins.
  • Positive drug or alcohol at screening and prior to first dose
  • History of alcohol abuse or substance abuse
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
88 participants (actual)

Study arms

  • Experimental
    AL101 IV

    * Up to four single ascending doses (SAD IV cohorts) * Multiple doses of AL101 administered IV (MD IV cohort)

    Biological: AL101

  • Placebo comparator
    Saline Solution

    Saline solution will be administered with the following: * Single IV infusion for four single ascending doses (SAD IV cohorts) in a ratio of 8 active and 3 placebo subjects * Multiple IV infusions for the MD IV cohort in a ratio of 8 active and 2 placebo subjects

    Other: Placebo

  • Experimental
    AL101 SC

    * Single fixed dose levels of AL101 administered SC * Multiple fixed dose of AL101 administered SC

    Biological: AL101

Interventions

  • BiologicalAL101

    Active dose of AL101

  • OtherPlacebo

    Saline solution administered as a single and multiple infusion as placebo.

06

What researchers measure

Primary outcomes

  1. Evaluation of safety and tolerability of AL101 measured by number of subjects with adverse events and Dose Limiting Adverse Event (DLAEs)

    Incidence of adverse events and dose limiting Adverse Events during the DLAE observation period and/or study treatment periods.

    Time frame: either 57, 113, or 141 days, depending on the cohort

Secondary outcomes

  1. Pharmacokinetics (PK) of AL101

    Serum and CSF concentration of AL101 at specified time points

    Time frame: either 57, 113, or 141 days, depending on the cohort

  2. Maximum plasma concentration (Cmax) for AL101

    Evaluate Cmax for serum and CSF concentration of AL101 at specified time points

    Time frame: either 57, 113, or 141 days, depending on the cohort

  3. Area under the curve concentration (AUC) for AL101

    Evaluate AUC for serum and CSF concentration of AL101 at specified time points

    Time frame: either 57, 113, or 141 days, depending on the cohort

07

Study locations

2 sites
  • Study site
    Miami, Florida 33126, United States
  • Study site
    Orlando, Florida 32806, 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 Aug 10, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04111666
Lead sponsor
Alector Inc.
Responsible party
Sponsor
First posted
Oct 1, 2019
Start date
Dec 14, 2019
Primary completion
Jun 9, 2022
Completion
Jun 9, 2022
Last update
Aug 10, 2022

Study contacts

Jorge Kusnir
principal investigator · Bioclinica Research
Maria Bermudez
principal investigator · Quotient Sciences

Oversight

Data monitoring committee
Yes
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 May 2022. You cannot join it, but the record below documents what was studied.

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