Dog Congenital Myasthenic Syndrome In Labrador Retriever (CMS-LR)

Discover the importance of DNA testing for Congenital Myasthenic Syndrome (CMS) in Labrador Retrievers. This genetic disorder affects muscle function and can lead to severe health issues in your furry friend. By conducting a CMS DNA test, you can identify carriers and affected dogs, ensuring responsible breeding practices. Early detection allows for better management of symptoms and enhances your Labrador's quality of life. Protect your beloved pet from potential health risks associated with CMS. Invest in a DNA test today and contribute to the health and longevity of Labrador Retrievers. Stay informed and make the best decisions for your dog's well-being!

Abbreviation : CMS-LR

Analysed mutation : LOC608697 c.1010T>C

Inheritance : Autosomal Recessive

Acronym

CMS-LR

Observed frequency

Rare

Clinical severity

Severe

Clinical classification

Neuromuscular Diseases

Analysed mutation

LOC608697 c.1010T>C
p.(I337T)

Mode of inheritance

Autosomal Recessive

Test summary:

Congenital Myasthenic Syndrome (CMS) is a hereditary condition affecting Labrador Retrievers, characterized by muscle weakness and fatigue. A DNA test can identify carriers of the gene responsible for this disorder, allowing responsible breeding practices to minimize the risk of passing it on. Early diagnosis through genetic testing can enhance the management of affected dogs, improving their quality of life. Owners are encouraged to consult veterinarians for testing options and implications. By understanding CMS, we can promote healthier generations of Labradors.

Available from the pack : Basic

This DNA test is included starting from our pack Basic — and is also part of the packs Basic, Standard, Advanced, Complete.

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Understanding Congenital Myasthenic Syndrome (CMS) in Labrador Retrievers

Congenital Myasthenic Syndrome (CMS) is a genetic disorder that affects the neuromuscular transmission in dogs, particularly noted in Labrador Retrievers. This condition arises due to mutations in genes responsible for the function and maintenance of neuromuscular junctions, leading to muscle weakness and fatigue. It is essential for dog owners and breeders to be aware of this condition, as it can significantly impact the quality of life of affected animals.

Symptoms of Congenital Myasthenic Syndrome

The symptoms of CMS can vary, but they typically include muscle weakness, especially after exercise, difficulty swallowing, and a tendency to collapse after exertion. Affected dogs may also exhibit signs of respiratory distress due to weakened muscles involved in breathing. These symptoms often manifest early in life, making it crucial for owners to recognize them promptly to seek veterinary advice.

Diagnosis of Congenital Myasthenic Syndrome

Diagnosing CMS involves a combination of clinical examination and genetic testing. Veterinarians may observe the characteristic symptoms and perform a thorough neurological examination. However, definitive diagnosis is usually confirmed through DNA tests that identify specific genetic mutations associated with the syndrome. This genetic testing plays a vital role in assessing the risk of the condition in breeding programs.

Management and Treatment Options

Currently, there is no definitive cure for CMS; however, management strategies can help improve the quality of life for affected dogs. Treatment often includes the use of medications that enhance neuromuscular transmission, such as anticholinesterase agents. Supportive care, including dietary modifications and physical therapy, may also be beneficial in managing symptoms and improving muscle strength.

The Role of Genetic Testing in Breeding

Genetic testing for CMS is an essential tool for responsible breeding practices. By identifying carriers of the genetic mutations associated with CMS, breeders can make informed decisions to reduce the incidence of this condition in future generations. This proactive approach not only helps in maintaining the health of Labrador Retrievers but also contributes to the overall welfare of the breed.

Conclusion

Congenital Myasthenic Syndrome poses significant challenges for Labrador Retrievers and their owners. Understanding the symptoms, diagnosis, and management of this condition is critical for ensuring affected dogs receive the appropriate care. Additionally, genetic testing plays a pivotal role in breeding practices, enabling breeders to make informed decisions that can help mitigate the risk of CMS within the breed. Awareness and education are key to improving outcomes for dogs affected by this syndrome.

Breed recognized for the test : Congenital Myasthenic Syndrome In Labrador Retriever (CMS-LR)

Australian Cobberdog
Labradoodle
Labrador Retriever
UK Breed Council Labrador Retriever

Interpretation of genotypes Genotype Status Learn more about the interpretation of genotypes FAQ: understanding the interpretation of result What does “Clear” mean? The animal does not carry the mutation. It will not develop the disease and will not pass it on. Is a “Carrier” serious? No. The animal is generally healthy but can transmit the mutation to its offspring. What if an animal is “Affected”? It carries two mutated copies. Clinical signs are expected depending on the disease. It should not be bred. Why are there differences between male / female? Some diseases are sex-linked, so their expression varies depending on the animal’s sex. The animal has two normal copies of the gene. No risk of developing or transmitting the disease. Heterozygous carrier: one mutated copy. The animal is usually not clinically affected but can pass the mutation to offspring. Male carrier or affected depending on the inheritance mode. Males have only one X or Y chromosome. Heterozygous female carrier: one mutated copy. She can pass the mutation on and may sometimes show mild clinical signs depending on the condition. Two mutated copies of the gene. The animal is at risk of developing the associated condition.

🧬 Interpretation of genotypes CMS-LR

Genotype

Status

🟡 N/N

Non-carrier - No Risk

🟡 N/CMS-LR

Carrier - No Risk

❌ CMS-LR/CMS-LR

Affected - At Risk

FAQ: understanding the interpretation

What does “Clear” mean?

The animal does not carry the mutation. It will not develop the disease and will not pass it on.

Is a “Carrier” serious?

No. The animal is generally healthy but can transmit the mutation to its offspring.

What if an animal is “Affected”?

It carries two mutated copies. Clinical signs are expected depending on the disease. It should not be bred.

Why are there differences between male / female?

Some diseases are sex-linked, so their expression varies depending on the animal’s sex.

Genotype Forecast for Offspring Mother Father Non-carrier Carrier Affected Favorable cross: majority Carrier risk is predominant. Majority affected Filter by mother's genotype Filter by father's genotype All Predict Offspring The animal has two normal copies of the gene. No risk of developing or transmitting the disease. Heterozygous carrier: one mutated copy. The animal is usually not clinically affected but can pass the mutation to offspring. Male carrier or affected depending on the inheritance mode. Males have only one X or Y chromosome. Heterozygous female carrier: one mutated copy. She can pass the mutation on and may sometimes show mild clinical signs depending on the condition. Two mutated copies of the gene. The animal is at risk of developing the associated condition.

Predict Offspring

Filter by mother's genotype Filter by father's genotype

N/N (Non-carrier)

N/CMS-LR (Carrier)

CMS-LR/CMS-LR (Affected)

DNA Test FAQ

What does this DNA test detect?

This DNA test detects the mutation associated with Congenital Myasthenic Syndrome In Labrador Retriever (CMS) in order to identify clear, carrier, or at-risk animals.

Why test a breeding animal?

DNA testing helps breeders plan safer matings and reduce the risk of transmitting the mutation to offspring.

What is the inheritance mode of this test?

The inheritance mode reported for this test is Autosomal Recessive.

Which mutation is analysed in this test?

This test analyses the mutation LOC608697 c.1010T>C.

Is a carrier animal necessarily affected?

Not necessarily. Interpretation depends on the inheritance pattern and the resulting genotype.

References

Rinz Caitlin J, Levine Jonathan, Minor Katie M, Humphries Hammon D, Lara Renee, StarrMoss Alison N, Guo Ling T, Williams D Colette, Shelton G Diane, Clark Leigh Anne. A COLQ missense mutation in Labrador Retrievers having congenital myasthenic syndrome. PLoS One. 2014 Aug 28;9(8):e106425. doi: 10.1371/journal.pone.0106425. eCollection 2014.

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