The primary objectives1. To assess the safety and tolerability of intravenous tracer administration of ANXV-800CW in up to three doses (0.5 mg, 1.0 mg, 2.0 mg flat dose) in patients with RVO and/or DR2. To determine the feasibility of molecular…
ID
Source
Brief title
Condition
- Ocular haemorrhages and vascular disorders NEC
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
To asses the safety and tolerability of intravenous administration of
ANXV-800CW (in 3 doses: 0.5 mg, 1.0 mg, 2.0 mg flat dose) in patient with
RVO/DR. This will be done by monitoring and evaluating whether (serious)
adverse events (S-)AEs) and suspected unexpected serious adverse reactions
(SUSARs) have occurred. These are defined as clinically significant changes in:
- Vital signs: blood pressure, heart rate, respiratory rate, body temperature
- Safety laboratory parameters such as incidence and titre of Anti-Drug
Antibodies ADA to ANXV
To asses the feasibility of fluorescent imaging for visualization/targeting of
ANXV-800CW in 3 doses (0.5 mg, 1.0 mg, 2.0 mg flat dose) in RVO/DR patients,
using a Near-Infrared (NIR) fluorescent imaging system. For this the
target-to-background ratio will be determined of the fluorescent signal by
using rbitrary Units (AUs)right before intravenous injection of ANXV-800CW and
at 5 minutes, 10 minutes, 20 minutes, 30 minutes, 1 hour, 1.5 hours, 2 hours
and 4 hours following administration.
Secondary outcome
To asses the pharmacokinetic profile of ANXV-800CW (3 doses: 0.5 mg, 1.0 mg,
2.0 mg flat dose) in patients with RVO/DR. This will be done, 5, 10, 20,30
minutes, 1 hour, 1.5 hours, 2 hours and 4 hours post administration:
- Area under the plasma concentration vs time curve from time zero extrapolated
to infinity (AUCinf)
- AUC from time zero to time of last quantifiable analyte concentration
(AUClast)
- Observed maximum concentration (Cmax)
- Time to Cmax (Tmax)
- Terminal slope of a semi-logarithmic concentration-time curve (*z)
- Terminal half life (T*)
- Clearance (CL)
- Volume of distribution (Vz)
- Dose proportionality after a single dose, based on AUC and Cmax if several
dose levels are investigated
In addition, this study will look at the PS availability, as measured with Flow
Cytometry right before and after ANXV-800CW administration.
Background summary
Based on population-based studies, approximately 16.4 million people are
diagnosed with retinal vein occlusion (RVO) worldwide. These studies have also
shown that the prevalence of RVO is between 0.40-2.2%. RVO is caused by an
abnormal blood flow in the retina, as a result of venous occlusion
(thrombosis). The severity of RVO depends on the site of the thrombosis. The
site of the thrombosis determines if the retina is partial or completely
affected by complications such as partial or complete blindness. The nature of
the occlusion formed in RVO patients has been debated. Notably, attempts to
treat RVO with classical antithrombotic or antiplatelet drugs have been largely
unsuccessful and are not a part of standard of care. Current treatment
strategies are based on the prevention of subsequent complications by
inhibiting the over-expression of Vascular Endothelial Growth Factor (VEGF),
inflammation and ischemia, using anti-VEGF therapeutics, corticosteroids and
laser therapy. There is currently no effective treatment modality for the
underlying cause of RVO.
ANXV is in development as a potential first-line treatment for patients with
retinal vein occlusion (RVO). The proposed drug product ANXV contains human
protein Annexin A5 produced by recombinant techniques in Escherichia Coli. As
the endogenous Annexin A5, the recombinant protein specifically binds to a
negative phospholipid-phosphatidylserine (PS) on cell membranes. ANXV ability
to bind to PS has been confirmed by the subsidizing party in vitro.
Recently, phosphatidylserine (PS) has been identified as a key molecule on
erythrocytes derived from patients with RVO and Annexin A5 has been
demonstrated to reduce the PS mediated aggregation and adhesion and aggregation
to vascular endothelium seen by the abnormal RVO-erythrocytes, providing
indirect proof of a potential to impact the venous occlusion. On the basis of
in vitro, ex vivo and in vivo pharmacology results, ANXV is expected to rapidly
and focally bind to PS-carrying cell membranes, interfere with PS-dependent
adherent cell-to-cell interactions at the site of occlusion, reduce the size of
or remove the occlusive aggregate.
In addition, Annexin-A5 is able to interfere with prothrombinase by acting on
coagulation factors, such as IXa-X-VIIa and Xa-prothrombin-Va. Moreover,
Annexin A5 is able to form a shield over PS on the membrane of the blood
platelets, red blood cells and endothelial cells. This layer reduces the
mobility of prothrombin and down-regulates tissue factors as coagulation factor
Xa. Combined, it causes 99% of the prothrombinase activity to be reduced,
therefore thrombin cannot be formed. Consequently, ANXV is expected to have a
targeted anticoagulation/ antithrombotic effect in RVO.
RVO is also associated with localized inflammation contributing to the macular
oedema and neo-vascularization. As a potential additional mode of action, ANXV
is known to reduce vascular inflammation in vivo. Lastly, in RVO, multiple
cells including the vascular endothelial cells are stressed and damaged.
Annexin A5 has been demonstrated to heal damaged cells by stabilizing and
supporting the re-alignment of phospholipids in the cell membrane.
Thus, ANXV holds potential to rapidly improve retinal blood supply, reduce the
risk of blindness and provide other short-term and long-term benefits for RVO
patients treated in the acute setting (as soon as possible after the diagnosis)
and prior to the emergence of complications.
The current near-infrared fluorescent diagnostic imaging study is aimed at
real-time visualization of Good Manufacturing Practice (GMP) produced
fluorescent-labelled ANXV-800CW in the eye of patients with RVO, determining
the binding of the labelled compound at the site of the venous occlusion.
Also, in the pathophysiology of DR, PS is expected to play a role. There is
both preclinical and clinical evidence that supports the hypothesis of the
usefulness of Annexin A5 in patients with DR. Research has shown that PS
exposure on platelets and monocytes was higher in proliferative DR than in
non-proliferative DR patients or healthy subjects. In addition, Annexin A5
imaging was used successfully in animal models of Diabetes Mellitus aimed at
monitoring the efficacy of therapeutic agents designed to suppress
ischemia-induced apoptosis. At least one imaging technology DARC (Detection of
Apoptosing Retinal Cells), has investigated the visualization of single retinal
neurons undergoing apoptosis by using fluorescently labeled Annexin A5 and
confocal scanning laser ophthalmoscopy in patients with glaucoma and in animal
models of other eye diseases. In DR, Annexin A5 can thus be useful for the
targeting of apoptotic PS-expression, which is expected to be present in the
affected eye due to retinal ischemia.
Since RVO is a rare disease and inclusion of RVO patients in the study is
cumbersome, we will use Diabetic retinopathy as an additional patient
population with PS expression in the eye. By investigating the uptake of ANXV
in affected retinal vessels, the proof-of-concept of PS targeting with ANXV can
be established.
Study objective
The primary objectives
1. To assess the safety and tolerability of intravenous tracer administration
of ANXV-800CW in up to three doses (0.5 mg, 1.0 mg, 2.0 mg flat dose) in
patients with RVO and/or DR
2. To determine the feasibility of molecular fluorescence imaging in the retina
of patients in up to three doses (0.5 mg, 1.0 mg, 2.0 mg flat dose) with RVO
and/or DR, using ANXV-800CW for visualizing biodistribution/targeting in the
eye using a Near- Infrared (NIR) fluorescence imaging system.
Secondary objectives
1. To determine the pharmacokinetic profile of ANXV-800CW in up to three doses
(0.5 mg, 1.0 mg, 2.0 mg flat dose) in patients with RVO and/or DR.
2. To determine phosphatidylserine availability as measured by flow cytometry
in whole blood before and after ANXV-800CW administration.
Study design
non-randomized, non-blinded, prospective, mono-center safety/ feasibility dose
optimization study
Intervention
All patients will undergo a standard of care ophthalmological work-up to
establish the diagnosis of RVO/DR: Best Corrected Visual Acuity (BCVA),
Tonometry, slit lamp biomicroscopy, fundoscopy, Optical Coherence Tomography
(OCT), Optical Coherence Tomography Angiography (OCT-A). In the context of this
study, Fluoresceine Angiography (FA) will be added to the ophthalmological
work-up for all patients. Furthermore, the patients will receive a systemic
single-dose injection of ANXV-800CW as part of a optimization study (either 0.5
mg, 1.0 mg or 2.0 mg), followed by NIR retinal fluorescence imaging. All
procedures will be performed on both eyes, the affected eye and the
non-affected eye.
Study burden and risks
The nature of participating to the study for the individual participant is
related to the injection of the fluorescent tracer ANXV-800CW and the
additional imaging procedures related to the study which are not standard of
care. The tracer is composed of the targeting moiety ANXV, a recombinant human
Annexin A5. Annexin A5s, albeit not the specific moiety ANXV, but with similar
binding properties has a known pharmacological profile from being used as
imaging agent in healthy volunteers and patients in nuclear molecular imaging.
Moreover, safety data are available of the systemic injection of ANXV in
healthy volunteers, a study with no evidence of drug related (S-)AEs or SUSARs
using the same dose-range intended for ANXV-800CW. As part of the in- and
exclusion criteria, kidney function is taken into account which decreases the
risk of safety issues. As mentioned, participants need to undergo some
diagnostic procedures besides the standard-of-care (SOC) for RVO/DR, which
creates an additional burden of time-investment may and impact patients with
RVO/DR. The imaging procedures are regarded a minimal risk as they are already
standard procedures within the diagnostic work-up of patients with complicated
RVO/DR. Blood sampling form superficial veins is not SOC and as such can pose a
risk of pain, hematoma and syncope related to the blood sampling. Patients in
the study are not expected to have a direct benefit, but it cannot be excluded.
The results of the study will support the anticipated dosing-range of ANXV for
treatment of RVO, (in the range of 0.5 to 2.0 mg), by the read-out of
side-specific targeting in the eye and the causing mechanism, which is
thrombosis. Furthermore, the results may support a development of an imaging
tool for selection of potential responders, prior to installment of ANXV
treatment in patents with RVO to confirm their eligibility for targeted ANXV
treatment. In conclusion, individual patients participating in the study may
serve the patient RVO group benefit for creating insight in the targeting of
ANXV in RVO.
Since RVO is a rare disease and inclusion of RVO patients in the study is
cumbersome, we will use Diabetic retinopathy as an additional patient
population with PS expression in the eye. By investigating the uptake of ANXV
in affected retinal vessels, the proof-of-concept of PS targeting with ANXV can
be established.
Hanzeplein 1
Groningen 9713 GZ
NL
Hanzeplein 1
Groningen 9713 GZ
NL
Listed location countries
Age
Inclusion criteria
RVO:
- Willing to adhere to the prohibitions and restrictions specified in this
protocol.
- Capable of giving signed informed consent (voluntarily), indicating that the
patient understands the purpose and procedures required for the study and is
willing to comply with the requirements and restrictions listed in the informed
consent form and in this protocol.
- Patients aged 18-85 years inclusive at moment signing informed consent form.
- Established (sub) acute Retinal Vein Occlusion
o Branch retinal vein occlusion (BRVO) or Central retinal vein occlusion (CRVO)
- BMI >= 18.0 and <= 35.0 kg/m2
- Overtly healthy based on medical history, physical findings, vital signs, ECG
at the time of screening, as judged by the Investigator.
o Note: one retest of vital functions and ECG is allowed within the screening
window
- No clinically significant laboratory abnormalities as determined by the
investigator
o Note: one retest of lab tests is allowed within the screening window
- Female patients should fulfil one of the following criteria:
o At least 1 year post-menopausal (amenorrhea >12 months and/or
follicle-stimulating hormone >30 mIU/mL) at screening;
o Surgically sterile (bilateral oophorectomy, hysterectomy, or tubal ligation);
o Women >45 years of age without a child wish, who agree to use an adequate
form of contraceptives during the study and whom have not the intention to
become pregnant anymore. In the case of an unlikely pregnancy, they accept the
possible maternal/ fetal risk of participation in the study
- Male subjects who are sexually active with a female partner of childbearing
potential must agree to the use of an effective method of birth control, and
must not donate sperm, until 3 months after administration of ANXV-800CW.
DR:
- Willing to adhere to the prohibitions and restrictions specified in this
protocol.
- Capable of giving signed informed consent (voluntarily), indicating that the
patient understands the purpose and procedures required for the study and is
willing to comply with the requirements and restrictions listed in the informed
consent form and in this protocol.
- Patients aged 18-85 years inclusive at moment signing informed consent form.
- Patients should be graded as one of the following:
o Diabetic retinopathy grade R2 pre-proliferative
o Diabetic retinopathy grade R3 proliferative
o Diabetic maculopathy grade M1
- BMI >= 18.0 and <= 35.0 kg/m2
- Overtly healthy based on medical history, physical findings, vital signs, ECG
at the time of screening, as judged by the Investigator.
o Note: one retest of vital functions and ECG is allowed within the screening
window
- No clinically significant laboratory abnormalities as determined by the
investigator
o Note: one retest of lab tests is allowed within the screening window
- Female patients should fulfil one of the following criteria:
o At least 1 year post-menopausal (amenorrhea >12 months and/or
follicle-stimulating hormone >30 mIU/mL) at screening;
o Surgically sterile (bilateral oophorectomy, hysterectomy, or tubal ligation);
o Women >45 years of age without a child wish, who agree to use an adequate
form of contraceptives during the study and whom have not the intention to
become pregnant anymore. In the case of an unlikely pregnancy, they accept the
possible maternal/ fetal risk of participation in the study
- Male subjects who are sexually active with a female partner of childbearing
potential must agree to the use of an effective method of birth control, and
must not donate sperm, until 3 months after administration of ANXV-800CW.
Exclusion criteria
RVO:
General:
- Behavioral or cognitive impairment or psychiatric disease that in the opinion
of the investigator affects the ability of the patient to understand and
cooperate with the study protocol
- Deprived of freedom by an administrative or court order or in an emergency
setting.
- Insufficient venous access for the study procedures.
- Close affiliation with the investigator; e.g. a close relative of the
investigator,
dependent person (e.g. employee or student), employee of the department of
Ophthalmology of the UMCG, TRACER or affiliates
- Any finding in the medical examinations or medical history giving, in the
opinion of the Investigator, reasonable suspicion of a disease or condition
that makes treatment with the investigational drug unadvisable, or that might
affect interpretation of the results of the study or render the patient at high
risk for treatment complications
- Participation in an interventional clinical study within 30 days prior to
screening visit (visit 1) that involved treatment with any drug (excluding
vitamins and minerals) or medical device
- Current alcohol/illicit drug abuse or addiction: history or evidence of
current drug use or addiction (positive urine drug screen for amphetamines,
barbiturates, benzodiazepines, cannabinoids, cocaine, or opiates) or excessive
use of alcohol at screening.
- Positive blood for safety: positive blood test on Hepatitis B, Hepatitis C
and HIV.
Medical conditions
- Eye disease that significantly interferes with fundus examinations in one or
both eyes
- Dilatation of the pupil < 5 mm in the study eye
- Ocular inflammation (including trace or more severe) or conjunctivitis at
screening, or history of uveitis in either eye
- Only one functional eye
- Current use of any medication that might have effect on the coagulation
cascade, hemostasis, and platelets.
o Note: the use of platelet aggregation inhibitors, such as acetyl salicylic
acid or its equivalents, is allowed.
o Note: the use of vitamin K antagonists is allowed given that the INR is
stable between 1-3 over the last 6 months before inclusion.
- History of significant bleeding (gross haematuria, haemoptysis,
gastrointestinal tract bleeding)
- Evidence or history of a hypercoagulable state (e.g. shortened APTT).
- Document history of autoimmune disease with anticipated presence of
potentially pathogenic Annexin A5 antibodies, e.g. antiphospholipid syndrome,
systemic lupus erythematosus or systemic sclerosis.
- Confirmed thalassemia (e.g sickle cell disease)
- Uncontrolled arterial hypertension, defined as systolic blood pressure > 160
mmHg or
diastolic blood pressure > 100 mmHg. One retest of vital functions is allowed
within the screening window.
- Cardiac impairment with an estimated LVEF < 35 % Prolonged QTcF (>450 ms),
cardiac arrhythmias or any clinically significant abnormalities in the resting
ECG at the time of screening, as judged by the investigator
- History of or a currently active hepatic or biliary disease
- History of or a currently active neurological disease
- eGFR (based on plasma-creatinine) outside of normal range at screening or
known renal impairment (<=40 mL/min).
- Any abnormalities in the vital signs of the patient, as judged by the
investigator, as a result of which the patient cannot participate
- Any clinically significant illness, medical/surgical procedure or trauma
within 4 weeks of the administration of IMP.
- Current evidence or history of bacterial, viral or fungal infections within 7
days before ANXV-800CW administration as judged by the Investigator.
o T > = 38.0°C or lab confirmed viral/bacterial/fungal infection (PCR)) or
symptoms suggestive of an infection)
- Any planned major surgery within the duration of the study (until visit 3),
with the exception of any emergency surgeries.
- Any laboratory test which is abnormal, and which is deemed by the
Investigator(s) to be clinically significant
- A history of anaphylaxis, history of allergic reaction(s), known allergy to
one of the drugs or excipients administered as part of this study. Mild
allergies without angio-edema or treatment need can be acceptable if deemed not
to be of clinical significance (including but not limited to allergy to animals
or mild seasonal hay fever)
- Current diagnosis of asthma or reactive airway disease associated with
exercise for which medication is used
Prior therapy
- Any prior systemic anti-VEGF treatment or intravitreal (IVT) anti-VEGF
treatment in the affected eye within a period of 3 months prior to start of the
study
- Any prior intraocular steroid injection in the affected eye within a period
of 3 months prior to start of the study
- Any prior grid or focal laser photocoagulation within 500 microns of the
foveal center
or any prior panretinal photocoagulation (PRP) in the affected eye
- Any intraocular eye surgery in the affected eye within a period of 3 months
prior to start of the study
- Yttrium-Aluminum-Garnet laser treatment performed within 28 days before
screening,
in the affected eye
DR:
General:
- Behavioral or cognitive impairment or psychiatric disease that in the opinion
of the investigator affects the ability of the patient to understand and
cooperate with the study protocol
- Deprived of freedom by an administrative or court order or in an emergency
setting.
- Insufficient venous access for the study procedures.
- Close affiliation with the investigator; e.g. a close relative of the
investigator,
dependent person (e.g. employee or student), employee of the department of
Ophthalmology of the UMCG, TRACER or affiliates
- Any finding in the medical examinations or medical history giving, in the
opinion of the Investigator, reasonable suspicion of a disease or condition
that makes treatment with the investigational drug unadvisable, or that might
affect interpretation of the results of the study or render the patient at high
risk for treatment complications
- Participation in an interventional clinical study within 30 days prior to
screening visit (visit 1) that involved treatment with any drug (excluding
vitamins and minerals) or medical device
- Current alcohol/illicit drug abuse or addiction: history or evidence of
current drug use or addiction (positive urine drug screen for amphetamines,
barbiturates, benzodiazepines, cannabinoids, cocaine, or opiates) or excessive
use of alcohol at screening.
- Positive blood for safety: positive blood test on Hepatitis B, Hepatitis C
and HIV.
Medical conditions
- Eye disease that significantly interferes with fundus examinations in one or
both eyes
- Dilatation of the pupil < 5 mm in the study eye
- Ocular inflammation (including trace or more severe) or conjunctivitis at
screening, or history of uveitis in either eye
- Only one functional eye
- Current use of any medication that might have effect on the coagulation
cascade, hemostasis, and platelets.
o Note: the use of platelet aggregation inhibitors, such as acetyl salicylic
acid or its equivalents, is allowed.
o Note: the use of vitamin K antagonists is allowed given that the INR is
stable between 1-3 over the last 6 months before inclusion.
- History of significant bleeding (gross haematuria, haemoptysis,
gastrointestinal tract bleeding)
- Evidence or history of a hypercoagulable state (e.g. shortened APTT).
- Document history of autoimmune disease with anticipated presence of
potentially pathogenic Annexin A5 antibodies, e.g. antiphospholipid syndrome,
systemic lupus erythematosus or systemic sclerosis.
- Confirmed thalassemia (e.g sickle cell disease)
- Cardiac impairment with an estimated LVEF < 35 % Prolonged QTcF (>450 ms),
cardiac arrhythmias or any clinically significant abnormalities in the resting
ECG at the time of screening, as judged by the investigator
- History of or a currently active hepatic or biliary disease
- History of or a currently active neurological disease
- eGFR (based on plasma-creatinine) outside of normal range at screening or
known renal impairment (<=40 mL/min).
- Any abnormalities in the vital signs of the patient, as judged by the
investigator, as a result of which the patient cannot participate
- Any clinically significant illness, medical/surgical procedure or trauma
within 4 weeks of the administration of IMP.
- Current evidence or history of bacterial, viral or fungal infections within 7
days before ANXV-800CW administration as judged by the Investigator.
o T > = 38.0°C or lab confirmed viral/bacterial/fungal infection (PCR)) or
symptoms suggestive of an infection)
- Any planned major surgery within the duration of the study (until visit 3),
with the exception of any emergency surgeries.
- Any laboratory test which is abnormal, and which is deemed by the
Investigator(s) to be clinically significant
- A history of anaphylaxis, history of allergic reaction(s), known allergy to
one of the drugs or excipients administered as part of this study. Mild
allergies without angio-edema or treatment need can be acceptable if deemed not
to be of clinical significance (including but not limited to allergy to animals
or mild seasonal hay fever)
- Current diagnosis of asthma or reactive airway disease associated with
exercise for which medication is used
Prior therapy
- Any prior systemic anti-VEGF treatment or intravitreal (IVT) anti-VEGF
treatment in the affected eye within a period of 3 months prior to start of the
study
- Any prior intraocular steroid injection in the affected eye within a period
of 3 months prior to start of the study
- Any prior grid or focal laser photocoagulation within 500 microns of the
foveal center
- or any prior panretinal photocoagulation (PRP) in the affected eye within a
period of 3 months prior to start of the study
- Any intraocular eye surgery in the affected eye within a period of 3 months
prior to start of the study
- Yttrium-Aluminum-Garnet laser treatment performed within 28 days before
screening,
in the affected eye
Design
Recruitment
Medical products/devices used
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
Register | ID |
---|---|
EudraCT | EUCTR2021-000866-13-NL |
CCMO | NL77192.056.21 |