Countrylanes Texan Dolly inherited both copies of the variant we tested for Exercise-Induced Collapse, EIC
Dolly is at increased risk for EIC
Dolly has two copies of a variant in the DNM1 gene and is at risk for developing EIC. Please note that this variant is known to have incomplete penetrance; that is, a number of dogs who carry two copies of this variant do not exhibit signs of the disease, suggesting that other genetic and environmental factors are required for animals to display signs of EIC. Please consult your veterinarian to discuss further diagnostics, monitoring, and care for Dolly.
EIC has been linked to a mutation in the DNM1 gene, which codes for the protein dynamin. In the neuron, dynamin trucks neurotransmitter-filled vesicles from the cell body, where they are generated, to the dendrites. It is hypothesized in dogs affected with EIC, the mutation in DNM1 disrupts efficient neurotransmitter release, leading to a cessation in signalling and EIC.
Signs develop in juvenile dogs, typically before 3 years of age.
This muscle disorder can cause episodes of muscle weakness and sometimes collapse. After recovering, most dogs are perfectly normal and eager to get back to work. While most dogs appear dazed or confused after an episode, most return to normal quickly.
Genetic testing, clinical signs, and muscle biopsy can be used to diagnose this disorder.
Dogs with this condition are otherwise normal and healthy, though some severely affected dogs have died during an episode. The factors determining the severity of an episode on a given day or in a given dog is unknown.
- Minimizing or eliminating intense exercise is the best way we currently know to prevent complications from this condition.