Existing treatments for diseases such as Alzheimer’s disease (AD), amyotrophic lateral sclerosis (ALS), schizophrenia (SCZ), glaucoma, and Fragile X syndrome (FXS) leave a critical gap in effective and patient-friendly solutions.
At Spinogenix, we want to do more than slow disease progression. Patients deserve new therapies that offer renewed hope. Our unique approach has the potential to be used alone as a “monotherapy” or as a restorative component to existing therapies targeting specific disease processes.
Spinogenix is pioneering a new way to treat conditions characterized by the loss or dysfunction of the fundamental building blocks in the brain called synapses, specifically, the connections between neurons allowing us to think, plan, remember, see, and control motor functions. Our platform of novel small molecules has the remarkable properties of being able to restore brain synapses with the potential to reverse declines in cognitive and motor function that could potentially benefit people with ALS, Alzheimer’s Disease, schizophrenia, FXS, movement disorders, and other diseases.
What Are Brain Synapses and Why Are They Important?
Brain Synapses are connections between neurons through which signals flow from one neuron to another. They are a fundamental and indispensable physical basis for neural communication, enabling cognition, movement, perception, memory, and other faculties of mind. Deterioration of brain synapses is an early and progressive feature of a broad spectrum of neurodegenerative, neuropsychiatric, and other diseases collectively known as the “synaptopathies”. For any investigational therapy to have a chance at reversing the symptoms of these diseases in patients, it must promote the restoration of brain synapses.
Diseases We Target – The Synaptopathies
Alzheimer’s Disease (AD)
Alzheimer’s Disease is the most common cause of dementia, accounting for ~60-70% of dementia cases worldwide. Alzheimer’s Disease affects nerve cells in the brain involved in learning, memory, and other cognitive abilities, causing a progressive loss of these functions that greatly impact a person’s quality of life. Loss of brain synapses occurs very early in Alzheimer’s and is a major driver of progressive impairments in cognition and memory. Currently, there is no cure for Alzheimer’s Disease, and medications that are approved for use have only a modest effect on symptoms and the rate of disease progression.
Amyotrophic Lateral Sclerosis (ALS)
ALS, also called Lou Gehrig’s disease, is a neurodegenerative disease that results in the progressive loss of motor neurons that control voluntary muscles. ALS is an orphan disease that affects as many as 30,000 people in the United States, with approximately 5,000 new cases diagnosed each year. ALS is the most common form of motor neuron disease, characterized by progressive paralysis and, almost invariably, death by respiratory failure within 2-5 years of diagnosis. Around half of people with ALS develop at least mild difficulties with thinking and behavior, and about 15% develop frontotemporal dementia. There is no known cure for ALS.
Schizophrenia (SCZ)
Schizophrenia is one of the most debilitating and prevalent psychiatric conditions, affecting around 24 million people worldwide. Symptoms of schizophrenia include “positive symptoms” such as hallucinations and delusions, “negative symptoms” such as anhedonia and social withdrawal, and “cognitive symptoms” such as working memory deficits. Positive symptoms can be treated with antipsychotics, but available treatments often leave many people’s symptoms inadequately addressed. Negative and cognitive symptoms are not well addressed by current medications. Synapse loss is a major feature of schizophrenia that begins during brain development and may contribute to each symptom domain. Available treatments for schizophrenia do not reverse synapse loss.
Fragile X syndrome (FXS)
FXS is the leading inherited form of intellectual disability and a known cause of autism that results from the silencing of the Fmr1 gene. FXS is an orphan disease affecting approximately 1 in 4-5000 men and 1 in 6-8000 women globally. In addition to intellectual disability, FXS patients endure a wide range of disabling symptoms, including severe anxiety, social aversion, hyperactivity and attention deficit, sensory hypersensitivity, aggression, developmental seizures, and others. Providing care for individuals with FXS often becomes a full-time commitment for at least one parent and imposes significant financial strain, with direct family healthcare costs totaling ~ $4.1 billion annually in the United States alone. Despite the considerable impact of FXS, there are currently no FDA-approved drugs available for those with the condition.
Glaucoma
Glaucoma is the leading cause of permanent blindness, affecting around 80 million people globally, including over 3 million in the U.S. Vision loss in glaucoma results from damage to the optic nerve and the death of neurons in the retina, including retinal ganglion cells (or RGCs) that send visual information from the eye to the brain through the optic nerve. Current treatments focus on slowing disease progression by lowering intraocular pressure, which is commonly associated with the condition. However, not all cases of glaucoma are linked to high pressure, and existing therapies have limitations. As a result, there is growing interest in new treatment strategies that aim to protect and regenerate damaged neurons to preserve or restore vision. Synapse loss in the retina precedes symptoms and neural death, raising the prospect that synaptic regeneration may be of therapeutic benefit. Currently, there is no cure for glaucoma.
The Benefits of a Tablet
Many of the new therapies being developed for neurodegenerative diseases such as ALS and Alzheimer’s disease are large macromolecules called “biologics”. These biologics have difficulty penetrating the central nervous system (CNS) and require IV infusion or intrathecal injections. Such therapies, which include antibodies that bind to toxic proteins or oligonucleotides that suppress the expression of a disease-related gene product, are often difficult to administer and costly to produce at scale. At Spinogenix, we are focused on developing small molecules designed to pass through the blood-brain barrier and penetrate the CNS. Tazbentetol and SPG601 are designed to be taken by mouth as a once-a-day pill, which has multiple benefits: ease of administration, improved patient compliance, and significant reduction in cost. Altogether, our investigational therapeutics may provide a simple, cost-effective, yet powerful approach to treating synaptopathies.
Regenerating Synapsis – tazbentetol and the TAGS Technology Platform
BK Channel Modulation – SPG601 for Restoring Synaptic Function in Fragile X syndrome (FXS)
FXS is the leading inherited form of intellectual disability and a known cause of autism that results from the silencing of the Fmr1 gene. Silencing of this gene leads to large and complex changes in mRNA and protein expression that results in abnormalities in synaptic function. Some of these abnormalities have been shown to be a result of a reduction in the amount and activity of large-conductance, calcium-activated potassium (“BK”) channels. Many core symptoms of FXS have been linked to deficient activity of BK channels.
SPG601 is a novel small molecule BK channel activator that works by binding to BK channels and increasing their activation to correct specific synaptic dysfunctions, addressing core symptoms of FXS.
Deficits in BK channel expression and activity have been linked to other conditions as well. Accordingly, pharmacological upregulation of BK channel activity has been proposed as a viable investigational therapeutic strategy in several neurodegenerative (e.g., Alzheimer’s disease, multiple sclerosis), vascular (e.g., cerebral hypoperfusion/vascular dementia), organ-specific (e.g., overactive bladder) and sensory disorders (e.g., tinnitus and neuropathic pain).
