Multiple system atrophy (MSA) – a rare but serious nerve disease

Aeltere-Mutter-Tochter

Insights into causes, diagnosis and progress in research.

Paar-Bank

What is multiple system atrophy (MSA)?

Neurodegenerative diseases such as Parkinson’s disease and multiple system atrophy (MSA) are diseases in which nerve cells in the brain gradually die off. This leads to various problems, especially with movement and control of the body.

The accumulation and aggregation of a certain protein (alpha-synuclein) in the nerve cells probably plays an important role in both diseases.

MSA is an atypical form of Parkinson’s disease. It has a prevalence of 4 to 5 cases per 100,000 people and is therefore rarer, but shows a faster progression than Parkinson’s disease.

Here, too, nerve cells die, but more extensive areas of the brain and more different types of brain cells are affected. This leads to a combination of symptoms that affect both the motor system and the autonomic nervous system.

Diagnosis is largely based on clinical examinations and imaging procedures. Brain imaging (cMRI, cCT) may show structural changes in the cerebellum, brainstem or basal ganglia. Unlike many other neurodegenerative diseases, MSA has a few clearly defined features that aid clinical assessment and help to provide a clearer diagnosis for the patient.

How does MSA manifest?

Typical symptoms

A dysfunction of the autonomic nervous system usually manifests itself in disorders of

  • the bladder function
  • the erectile function
  • intestinal mobility
  • the regulation of blood pressure and body temperature
Parkinson’s-like symptoms

These often occur in addition, for example

  • slowness of movement
  • stiffness of the muscles

Disorders of cerebellar function with impaired coordination, progressive loss of balance or speech disorders are also common.

Thinking and memory disorders (cognitive disorders) are rather rare

Progression and frequency of MSA

Depending on the symptoms, a distinction is made between MSA-P (Parkinson’s-type MSA) with predominantly Parkinson’s symptoms and MSA-C (cerebellar-type MSA) with predominantly cerebellar dysfunction. The two clinical manifestations MSA-P and MSA-C occur in a ratio of three to two.

Around 4-5 out of every 100,000 people suffer from MSA. The disease typically begins in adulthood, usually between the ages of 50 and 60. Men and women are affected to roughly the same extent and there is no difference in the clinical course. To date, there is no cure and no specific drug treatment for MSA. The average survival time after diagnosis is six to ten years.

How is MSA treated?

Medication and supportive therapies can alleviate motor symptoms, but there is currently no cure. The treating neurologist can create an individualized treatment plan tailored to the patient’s specific needs. This plan may include various treatment options:

Drug therapy:
Drugs such as levodopa can help to compensate for the dopamine deficiency and improve movement symptoms.

Physiotherapy:
Regular exercises to improve mobility and balance.

Occupational therapy:
Provides support in coping with everyday activities and adapting the living environment.

Speech therapy:
Helps with speech and swallowing problems.

Our progress in research

Our drug candidate emrusolmin (anle138b, TEV-56286) for MSA

Before use on humans

Extensive laboratory tests with world-leading scientists to understand the mechanisms of action

Phase 1

Procedure
  • Phase 1a
    First application on healthy participants
  • Phase 1b
    First application on patients
  • DDI study
    Checking whether the drug interacts with other drugs

Active ingredient behavior in the body

  • Oral ingestion, half-life of ~12 hours, food intake does not impair the exposure
  • Exposure: blood concentrations reach values that were effective in animal models

Security

  • No pattern of drug-related side effects
  • No serious adverse events have occurred

Phase 2

TOPAS-MSA study
(Targeting Oligomer Pathology of Alpha-Synuclein in MSA)

  • Study drug
    Emrusolmin (anle138b, TEV-56286)
  • Random group allocation
    (drug vs. placebo)
  • Double-blind
    Neither patients nor doctors know who is receiving the drug and who is receiving the placebo
  • 48-week main study
    and subsequent open extension phase

Target variables

  • Primary endpoint
    Change in UMSARS symptom score: whether health status has improved in terms of mobility and daily living skills
  • Further endpoints
    Other clinical scales, biomarkers, safety and tolerability

Emrusolmin (anle138b) is currently in clinical phase 2. Preclinical studies showed a significant reduction in alpha-synuclein aggregation and an improvement in motor symptoms in animal models.

Dr. Torsten Matthias, Prof. Dr. Armin Giese

Our innovative research approaches at the interface of molecular biology and medicine open up new perspectives in the treatment of neurodegenerative diseases. Through the targeted modulation of pathological protein aggregates, we strive to fundamentally change the course of synucleinopathies such as Parkinson’s disease and MSA. Our work is more than research – it is a promise to patients and their families to relentlessly search for solutions that could improve the lives of millions of people.