Spinal Muscular Atrophy and the Possibilities with an Investigational Drug in a Clinical Trial

Living with Spinal Muscular Atrophy

Spinal muscular atrophy (SMA) is a rare, inherited condition that affects the nerves that control muscle movement. Adults living with SMA experience muscles that feel weak and tire easily, especially in the legs and arms. This can make life frustrating and even impossible to do everyday things like walk, climb stairs, lift objects or raise up from a chair. Even with the exciting advances in SMN-targeted treatments, muscle weakness and fatigue remain ongoing challenges that can limit independence and make daily life more difficult.

If this sounds like your experience, you’re not alone - and an investigational drug is being studied to help improve muscle strength and endurance.

NMD Pharma’s Treatment Approach: Targeting the Skeletal Muscles Affected by SMA

NMD670 is an investigational drug in a new class of treatment, featuring a novel mechanism of action distinct from current SMN-targeted therapies or other muscle directed therapies. It is an oral medication taken with a simple glass of water.

NMD670 is being evaluated in clinical trials in the US, Europe and Canada for adults living with spinal muscular atrophy (SMA). It is a skeletal muscle-targeted therapy that is being investigated for the potential to increase muscle responsiveness to weak nerve signals and enable more consistent muscle function.

In a previously completed, early phase placebo-controlled clinical trial in a different neuromuscular disease also characterized by weak nerve signals reaching the muscles, patients received only a single dose of NMD670 and results indicated meaningful improvements in muscle strength for patients across multiple types of skeletal muscles (face, mouth, swallowing, arms, legs) throughout the body.1 Now, researchers are studying NMD670 in a clinical trial to understand the safety and efficacy of the drug in ambulatory adults living with SMA. Though NMD670 is not expected to cure SMA, it may provide meaningful improvements in muscle function making daily life easier and resulting in greater independence.

1 Villanueva MT. Small molecule improves muscle function in myasthenia gravis. Nat Rev Drug Discov. 2024 May;23(5):338

An On-Going Clinical Trial to Study the Potential Benefits and Safety of a New Investigational Skeletal Muscle-Targeted Drug

The SYNAPSE-SMA Study is evaluating an investigational drug called NMD670 in ambulatory adults living with Type 3 spinal muscular atrophy (SMA) in clinical sites located in the US, Europe and Canada.

You may be able to take part in the SYNAPSE-SMA Trial if you:

  • Are 18-75 years of age

  • Have been diagnosed with Type 3 SMA

  • Can walk at least 50 meters (164 feet) without a walking aid

  • Can attend 6 different in-clinic visits over a period of up to 13 weeks (depending on scheduling)

Importantly, you can remain on your existing SMN-targeted drug therapies while in this study. SYNAPSE-SMA is a crossover study. This means that all study participants will receive NMD670 during the study.

This is not a complete list of study requirements. The study doctor will review the full requirements for this study with you. It is important to note that future studies are being considered which will include expanded eligibility criteria specific to ambulatory status, SMA type, and age range to include adolescents.

There is no cost to participate in this study, and your reasonable travel costs will be reimbursed (flight, mileage, hotel, parking, meals). Compensation may also be available for time taken for study visits or lost wages.

For more information and to request involvement in this important Adult SMA Clinical Trial, including cities/states of clinical trial sites and contact information for clinical coordinators, please visit clinicaltrials.gov or email NMD Pharma at: clinicaltrials@nmdpharma.com

NMD670 has not been approved by Regulatory Health Authorities and the safety and effectiveness of NMD670 in SMA, MG or CMT has not been established