Clinical trial NCT06816810: A Study to Evaluate Efficacy, Safety and Tolerability of Hydroxychloroquine in Subjects With Parkinson's Disease
Official title: TALLman Family Energizes Research To Help Alleviate Neuroinflammation in Parkinson's Disease - "TALLER THAN PD." A Phase 2 Futility Study to Evaluate the Efficacy, Safety and Tolerability of Hydroxychloroquine in Subjects With Early Treated Parkinson's Disease
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: PHASE2
Conditions: Parkinson&Amp;#39;s Disease
Keywords: Hydroxychloroquine
Neuroinflammation
Neuroprotection
Parkinson
Lead sponsor: Ottawa Hospital Research Institute
Sponsor class: OTHER
First posted: 2025-02-10
Enrollment: 40
Sex: ALL
Minimum age (years): 35
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to determine if hydroxychloroquine is safe to take and whether there is potential for it to slow the progression of PD symptoms. This will be done by comparing how PD symptoms progress throughout the study compared to how people with PD typically progress. Within PD, it is thought that an inflammation response is associated with abnormal forms of a protein called alpha-synuclein in the brain. Individuals who have taken this medication for other conditions have been shown to be less likely to develop PD than people who have not taken this medication. Therefore, it is hoped that the study drug may interrupt the inflammation response and in turn stop/delay the progression of PD.

Detailed description: Parkinson disease (PD) is a progressive neurodegenerative disorder pathologically characterized by the loss of dopaminergic neurons in the substantia nigra and the presence of α-synuclein protein inclusions termed Lewy bodies. There is increasing evidence of the important role of inflammation in the pathophysiology in PD. Studies of the innate and adaptive immune systems provide evidence that immune dysregulation in both the periphery and brain can cause upregulation of inflammatory cytokines that initiate a cascade of pro-inflammatory signaling events that ultimately result in the neurotoxicity. Post-mortem studies reveal activated microglia and T-cells and immunoglobulin deposition in brain tissue from PD subjects. Alterations in immune cells are detected in living PD subjects, with most consistent findings pointing to T-cell and monocyte changes. Peptides derived from αsynuclein, the key protein that aggregates in PD and the primary component of Lewy bodies, can activate T-cells from PD patients. Pro-inflammatory cytokines and chemokines are elevated in blood and cerebrospinal fluid (CSF) specimens from PD subjects. In vivo evaluation of microglial activity has been performed using positron emission tomography (PET) ligands to measure and shown evidence of neuroinflammation in the brains of patients with PD. Mutations in more than 20 genes have been identified that cause PD with many of them (e.g. LRRK2, SNCA, GBA, PRKN, PINK1) encoding proteins that modulate immune function. Animal PD models show inflammatory changes, and manipulation of inflammation can alter neurodegeneration in animal models. A wide range of epidemiologic studies have supported the role of inflammation in PD that includes data to suggest that ibuprofen and treatment of inflammatory bowel disease with anti- tumor necrosis factor (TNF) biologics are associated with reduced PD risk.

The repurposing of generic drugs is a strategy to identify new treatment options for PD because of their known safety profile. Hydroxychloroquine (HCQ) was approved for medical use for over 50 years as a treatment for malaria, systemic lupus erythematosus, and rheumatoid arthritis and is on the World Health Organization's List of Essential Medicines. It belongs to a class of medications known as disease-modifying antirheumatic drug that can reduce skin problems in lupus and prevent swelling/pain in arthritis. It has been shown to interfere with lysosomal activity and autophagy, interact with membrane stability and alter signaling pathways and transcriptional activity, which can result in inhibition of cytokine production and modulation of certain co-stimulatory molecules. HCQ has been studied in multiple sclerosis (MS) which is an inflammatory and neurodegenerative disease of the central nervous. In mice models of MS, HCQ has been shown to inhibit microglia activation and attenuate the severity of disease. Hydroxychloroquine reduces microglial activity and attenuates experimental autoimmune encephalomyelitis. A phase II futility trial of 200 mg bid HCQ in 35 patients with primary progressive MS was associated with reduced disability worsening over 18 months. HCQ was well tolerated overall, with adverse events in 82% and serious adverse events in 12% of participants. All serious adverse events were felt to be unlikely related to HCQ. In this study, HCQ treatment attenuated the increase of neurofilament-light (NfL) after 6 months of treatment and up to 18 months of follow-up, suggesting a treatment effect of HCQ over these biomarkers

Eligibility criteria: Inclusion Criteria:

* The subject is ≥35 and ≤80 years of age at the time of informed consent.
* The subject has a clinical diagnosis of PD for at least 6 months and for no longer than 4 years before initiation of screening as confirmed by a neurologist using the MDS Criteria for Parkinson's Disease (Postuma, Berg et al. 2015)
* The subject has a Hoehn and Yahr score ≤2.
* The subject has been on stable doses of PD medications for at least 30 days and the investigator does not anticipate they will require a change of their usual PD medications for a period of 48 weeks.
* The subject has a score ≥24 on the MoCA scale.
* The subject does not have severe motor fluctuations or disabling dyskinesias in the clinical judgment of the investigator (MDS-UPDRS score \> 2 on any item IV).
* If a sexually active man or a woman of childbearing potential, the subject agrees to use highly effective birth control or to remain abstinent during the trial and for 30 days after the last dose of HCQ. Acceptable (highly effective) methods of contraception for this study include hormonal contraceptives or implant); intrauterine device or system; complete abstinence from sexual intercourse if this is the subject's usual and preferred lifestyle; or sexual partner with surgical sterilization (e.g., tubal ligation, hysterectomy and/or bilateral oophorectomy, vasectomy).
* The subject is capable of giving signed informed consent, which includes understanding the purpose and risks of the study, compliance with the requirements and restrictions that are listed in the informed consent form (ICF) and this protocol, and authorization to use confidential health information in accordance with national and local subject privacy regulations

Exclusion Criteria:

* The subject has atypical or secondary parkinsonism by medical history or in the opinion of the investigator. Atypical parkinsonism includes, but is not limited to, diagnoses of progressive supranuclear palsy, cortico-basal syndrome, and multiple system atrophy. Secondary parkinsonism includes drug-induced, toxin-induced, postinfectious, posttraumatic, or vascular parkinsonism.
* The subject has a history of (within 60 days before initiation of screening) or has planned upcoming major surgery that could interfere with, or for which the treatment might interfere with, the conduct of the study or that would pose an unacceptable risk to the subject in the opinion of the investigator.
* The subject has any active or chronic disease including but not limited to cardiomyopathy or condition other than PD that could interfere with, or for which the treatment might interfere with, the conduct of the study or pose an unacceptable risk to the subject in the opinion of the investigator based on medical history, physical examination, vital signs, 12-lead ECG, or clinical laboratory tests.
* Minor deviations of laboratory values from the normal range may be acceptable if judged by the investigator to have no/minor clinical relevance.
* The subject has a recent history (last 6 months) of abuse of addictive substances (alcohol, illegal substances), currently uses \>21 units of alcohol per week, or is a regular recreational user of sedatives, hypnotics, tranquillizers, or any other addictive agent in the opinion of the investigator.
* The subject is currently pregnant, is planning pregnancy within the timeframe of the study, or is breastfeeding.
* Patient has a history of psoriasis or porphyria.
* The subject has used any of the following medications within 60 days before Baseline: typical or atypical antipsychotics (including, but not limited to, clozapine, pimavanserin, olanzapine, risperidone, and aripiprazole), metoclopramide, prochlorperazine, methyldopa, tetrabenazine, azithromycin, antimalarial drugs, tamoxifen, amiodarone, dapsone, or digoxin.
* The subject has received a vaccination within 14 days before administration of the first dose of IMP.
* The subject has a prior history of or there is a plan to undergo Deep Brain stimulation, brain lesional procedures (i.e., thalamotomy), or focused ultrasound; to initiate gene therapy treatment for PD; or to initiate use of any formulation of intestinal infusion or continuous subcutaneous infusion of PD medications during the following 48 weeks.
* The subject is currently participating in or has participated in an investigational drug study within 3 months or 5 half-lives, whichever is longer; in a therapeutic device study within 3 months before the first dose of IMP; or has previously participated in a gene therapy trial. Concurrent participation in an observational study is acceptable.
* The subject has renal insufficiency as defined by an estimated glomerular filtration rate (eGFR) of \<60 mL/min at screening.
* The subject has cirrhosis or any of the following laboratory values at screening: serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>2 times the upper limit of normal (ULN) or bilirubin \>2 × ULN except if the subject has known or suspected Gilbert's disease.
* The subject has a QTcF (QT interval corrected for heart rate by Fridericia's method) value \>450 msec if male or \>470 msec if female at screening.
* The subject has previously received hydroxychloroquine or has a known allergy or hypersensitivity to hydroxychloroquine or any components of the formulation.
* The subject has a history of bone marrow failure, anemia, aplastic anemia, agranulocytosis, leukopenia, or thrombocytopenia
* The subject has a history of glucose-6-phosphate dehydrogenase (G-6-PD) deficiency
* The subject is unable or unlikely to comply with the dosing schedule or study evaluations in the judgment of the investigator.
* The subject is a member of a protected/vulnerable population, defined as persons who are pregnant, parturient, or breastfeeding; persons who are deprived of liberty; persons who are admitted to a health or social institution for purposes other than research; adults who are under legal protection or who are unable to express their consent; persons who are in an emergency situation and are unable to express their prior consent; and persons are who are non-affiliated or a non-beneficiary of a social security system.
* The subject is a relative of the investigator or sponsor or the relative of an employee of the sponsor.
* The subject has a history of retinopathy or is found to have a significant retina finding on screening ophthalmologic examination.

Primary outcomes:
measure: Number of participants with treatment-related adverse events as assessed by CTCAE v4.0
timeFrame: Throughout enrollment (4 weeks of screening) to the end of treatment at 48 weeks and 4-week safety follow-up.
measure: Efficacy of Hydroxychloroquine (HCQ) in Delaying Clinical Motor Progression Using MDS-UPDRS Part III
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. MDS-UPDRS Part III will be evaluated at baseline, 24 weeks and 48 weeks.
Secondary outcomes:
measure: Efficacy of Hydroxychloroquine (HCQ) in Delaying Clinical PD Progression Using CGI-C Scale
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. CGI-C will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Efficacy of Hydroxychloroquine (HCQ) in Delaying Clinical PD Progression Using CGI-S Scale
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. CGI-S will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Efficacy of Hydroxychloroquine (HCQ) in Delaying Clinical PD Progression Using PGI-S Scale
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. PGI-S will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Efficacy of Hydroxychloroquine (HCQ) in Delaying Clinical PD Progression Using PGI-C Scale
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. PGI-C will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Change in Quality of Life (QoL) as assessed by the PDQ-8
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. QoL will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Efficacy of Hydroxychloroquine (HCQ) Using Change in Modified Hoehn and Yahr Scale
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. Modified Hoehn and Yahr Scale will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Efficacy of Hydroxychloroquine (HCQ) in Slowing Clinical Disease Progression as Assessed by the MDS-UPDRS
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. MDS-UPDRS will be evaluated at baseline, 24 weeks and 48 weeks.
Other outcomes:
measure: Change in Motor Score as Assessed by the PRIMS Digital Assessment
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. PRIMS Digital Assessment will be evaluated at baseline, 24 weeks and 48 weeks.
measure: Change in Motor Function as Assessed by Celestra Gait Assessment
timeFrame: Throughout enrollment to the end of treatment at 48 weeks. Celestra insole gait assessment will be evaluated at baseline, 24 weeks and 48 weeks.
Locations:
city: Ottawa
country: Canada
facility: The Ottawa Hospital
state: Ontario
Study officials:
affiliation: The Ottawa Hospital
name: David Grimes, MD, FRCPC
role: PRINCIPAL_INVESTIGATOR
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