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Study of AMDX-2011P as a Retinal Tracer in Subjects With Neurodegenerative Diseases Associated With Amyloidogenic Proteinopathy

Prospective Randomized Open, Blinded Endpoint (PROBE) Study of AMDX-2011P as a Retinal Tracer in Subjects With Neurodegenerative Diseases Associated With Amyloidogenic Proteinopathy

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05542576
Acronym
PROBE
Enrollment
13
Registered
2022-09-15
Start date
2022-08-24
Completion date
2023-03-15
Last updated
2025-08-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Amyotrophic Lateral Sclerosis, Parkinson Disease

Keywords

Parkinsons, ALS

Brief summary

The purpose of this research study is to assess safety and tolerability of a single intravenous (given through a vein) dose of the investigational retinal tracer AMDX-2011P in patients with neurodegenerative diseases (Parkinson's disease and ALS).

Detailed description

The primary objective of this study is to evaluate the safety and tolerability of three different doses of AMDX-2011P (25mg, 50mg, or 100mg) given as a single intravenous dose in patients with neurodegenerative diseases (Parkinson's disease and ALS). The first cohort of participants taking part in the study will receive the lowest dose of AMDX-2011P (25mg). If no major side effects occur, the dose will be increased for the next group of participants to 50mg and then to 100mg. Secondary objective of this study is to characterize the pharmacokinetic (PK) profile of AMDX-2011P and AMDX-2011. Exploratory evaluations of the biological activity of AMDX-2011P in the retina will be performed by imaging.

Interventions

DRUGAMDX2011P

AMDX2011P single bolus injection intravenous for diagnostic review

Sponsors

Amydis Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
DIAGNOSTIC
Masking
NONE

Intervention model description

Dose escalating via Cohorts total 1-3 cohorts

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

For Subjects with Parkinson's Disease 1. Clinically established Parkinson's disease based on Movement Disorder Society (MDS) Clinical Diagnostic Criteria for Parkinson's disease (Table 8) and a modified Hoehn & Yahr scale of 1-3 (Table 9). 2. No suspected atypical parkinsonian syndromes due to drugs, metabolic disorders, encephalitis, or degenerative diseases. For Subjects with ALS 3. Confirmed diagnosis of ALS with both upper and lower motor neuron involvement. For All Subjects 4. Ability to undergo retinal imaging. 5. Subject or legally authorized representative must provide signed informed consent (or signed assent form) prior to study entry and have the ability and willingness to attend and comply with the necessary study procedures and visits at the study site. For subjects unable to physically sign the informed consent, a guardian or trusted care giver can sign on their behalf in presence of an independent witness. 6. Contraception use by study subjects of childbearing potential (male and female) and female partners of childrearing potential male subjects should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.

Exclusion criteria

1. Presence of any underlying physical or psychological medical condition that would make it unlikely that the subject will complete the study per protocol. 2. Clinically significant laboratory abnormalities assessed by the investigator. 3. Active malignancy and/or history of malignancy in the past 5 years, with the exception of completely excised non-melanoma skin cancer or low-grade cervical intraepithelial neoplasia. 4. Prolonged QTcF (\>450 ms for males and \>470 ms for females), cardiac arrhythmia, or any clinically significant abnormality in the resting ECG, as judged by the investigator. 5. Presence of any ocular condition that would significantly hinder the ability to detect and quantify hyper-fluorescent puncta (e.g., eyes with significant hyper-autofluorescence that would mask the ability to detect, quantify, and discern post-injection hyper-fluorescent signal from pre-injection hyper-autofluorescence signal). 6. Use of any new prescription therapies or vaccines within 7 days prior to the study drug administration. 7. Drugs with potential phototoxicity per Package Insert are prohibited within 48 hours or 5 half-lives, whichever is longer, prior to first study drug until End-of-study (EOS) visit, except for those required for treatment of underlying disease. 8. Administration of investigational product in another study within 30 days prior to the first study drug administration, or five half-lives, whichever is longer. 9. Females who are pregnant or breastfeeding.

Design outcomes

Primary

MeasureTime frameDescription
AMDX-2011P Adverse Events Profile1 weekIncidence of Treatment Emergent Adverse Events (TEAEs) at for each cohort (dose level).

Secondary

MeasureTime frameDescription
Pharmacokinetic Analysis of AMDX-2011P8 hoursArea under the plasma concentration versus time curve (AUC)
Concentration of AMDX-2011P8 hoursPeak Plasma Concentration (Cmax)

Countries

United States

Participant flow

Recruitment details

13 subjects: 3 in Cohort 1 (25mg dose) 4 in Cohort 2 (50mg dose) 6 in Cohort 3 (100mg dose)

Participants by arm

ArmCount
AMDX2011P 25mg
25mg (1ml) single bolus injection intravenous for diagnostic review
3
AMDX2011P 50mg
AMDX2011P 50mg (2ml) single bolus injection intravenous for diagnostic review
4
AMDX2011P 100mg
AMDX2011P 100mg (4ml) single bolus injection intravenous for diagnostic review
6
Total13

Baseline characteristics

CharacteristicAMDX2011P 25mgAMDX2011P 50mgAMDX2011P 100mgTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
2 Participants2 Participants4 Participants8 Participants
Age, Categorical
Between 18 and 65 years
1 Participants2 Participants2 Participants5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants1 Participants0 Participants1 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
3 Participants3 Participants6 Participants12 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
3 Participants4 Participants6 Participants13 Participants
Sex: Female, Male
Female
1 Participants3 Participants0 Participants4 Participants
Sex: Female, Male
Male
2 Participants1 Participants6 Participants9 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 30 / 40 / 6
other
Total, other adverse events
0 / 31 / 43 / 6
serious
Total, serious adverse events
0 / 30 / 40 / 6

Outcome results

Primary

AMDX-2011P Adverse Events Profile

Incidence of Treatment Emergent Adverse Events (TEAEs) at for each cohort (dose level).

Time frame: 1 week

ArmMeasureValue (NUMBER)
AMDX2011P 25mgAMDX-2011P Adverse Events Profile0 Treatment Emergent Adverse Events TEAEs
AMDX2011P 50mgAMDX-2011P Adverse Events Profile1 Treatment Emergent Adverse Events TEAEs
AMDX2011P 100mgAMDX-2011P Adverse Events Profile3 Treatment Emergent Adverse Events TEAEs
Secondary

Concentration of AMDX-2011P

Peak Plasma Concentration (Cmax)

Time frame: 8 hours

ArmMeasureValue (MEAN)Dispersion
AMDX2011P 25mgConcentration of AMDX-2011P4400 ng/mLStandard Deviation 572
AMDX2011P 50mgConcentration of AMDX-2011P16600 ng/mLStandard Deviation 15800
AMDX2011P 100mgConcentration of AMDX-2011P14600 ng/mLStandard Deviation 3890
Secondary

Pharmacokinetic Analysis of AMDX-2011P

Area under the plasma concentration versus time curve (AUC)

Time frame: 8 hours

ArmMeasureValue (MEAN)Dispersion
AMDX2011P 25mgPharmacokinetic Analysis of AMDX-2011P706 h*ng/mLStandard Deviation 110
AMDX2011P 50mgPharmacokinetic Analysis of AMDX-2011P3170 h*ng/mLStandard Deviation 3290
AMDX2011P 100mgPharmacokinetic Analysis of AMDX-2011P2330 h*ng/mLStandard Deviation 637

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026