Dog Canine Malignant Hyperthermia (MH)

Discover the importance of DNA testing for Canine Malignant Hyperthermia (MH) in dogs. This genetic disorder can lead to severe reactions during anesthesia, placing your furry friend at risk. By identifying the MH gene mutation through a simple DNA test, pet owners can make informed decisions about their dog's health and safety. Early detection allows for proactive management, ensuring a safer experience during veterinary procedures. Investing in a DNA test for Canine Malignant Hyperthermia can ultimately save lives and enhance your dog's well-being. Consult your veterinarian today to learn more about this vital genetic screening. Protect your pup with knowledge and peace of mind!

Abbreviation : MH

Analysed mutation : RYR1 c.1643T>C

Inheritance : Autosomal Dominant

Acronym

Observed frequency

Rare

Clinical severity

Severe

Clinical classification

Metabolic Diseases

Analysed mutation

RYR1 c.1643T>C
p.(V548A)

Mode of inheritance

Autosomal Dominant

Test summary:

Canine Malignant Hyperthermia (MH) is a rare genetic disorder triggered by certain anesthetic agents in dogs. It leads to a severe and uncontrolled increase in body temperature, muscle rigidity, and metabolic disturbances. The condition is often linked to mutations in the ryanodine receptor gene. Prompt recognition and immediate treatment are crucial to prevent serious complications or death. Preventive measures include genetic testing and avoiding specific anesthetics in at-risk breeds.

Available from the pack : Basic

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Introduction to Canine Malignant Hyperthermia (MH)

Canine Malignant Hyperthermia (MH) is a rare but serious genetic disorder that affects certain dog breeds. It is characterized by an abnormal and severe response to specific stressors, such as anesthesia or extreme heat, leading to a rapid increase in body temperature and metabolic crisis. If not recognized and treated promptly, MH can be fatal for the affected dog.

Understanding the Condition

Malignant Hyperthermia in dogs is caused by a hereditary defect in the regulation of calcium within muscle cells. This defect leads to uncontrolled muscle contractions and a significant increase in metabolic activity, resulting in a rapid rise in core body temperature. Symptoms often include muscle rigidity, rapid breathing, increased heart rate, and a sudden onset of hyperthermia. The condition is often triggered by certain anesthetic agents or stress, making perioperative management critical.

Genetic Basis of Canine MH

The disorder is inherited in a manner similar to that observed in humans, with specific genetic mutations affecting calcium regulation pathways. Dogs carrying these mutations are predisposed to developing MH when exposed to triggering factors. Identifying affected dogs through DNA testing allows breeders and veterinarians to make informed decisions to prevent the spread of the disorder and to implement appropriate management strategies for affected animals.

The Role of DNA Testing

DNA testing for canine MH involves analyzing specific genetic markers associated with the disorder. This test provides valuable information about an individual dog's genetic status, helping to identify carriers or affected animals. Early detection through DNA testing can assist in making preventative choices, such as avoiding certain medications or stressful situations that could trigger a crisis, thereby safeguarding the health and well-being of the dog.

Importance of Diagnosis and Management

Accurate diagnosis of MH through DNA testing is essential for effective management. Dogs identified as at risk can be provided with tailored anesthetic protocols, monitored closely during procedures, and kept in a stress-free environment. Additionally, knowing a dog’s genetic status helps inform breeding decisions to reduce the prevalence of the disorder within a breed population.

Breed recognized for the test : Canine Malignant Hyperthermia (MH)

Bearded Collie
Border Collie
Doberman Pinscher
Farm Collie
German Shepherd Dog
Labrador Retriever
Old Farm Collie
Rough Collie
Scottish Collie
Scottish Rough Collie
Scottish Smooth Collie
Smooth Collie

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 MH

Genotype

Status

🟡 N/N

Non-carrier - No Risk

🟡 N/MH

Carrier - At Risk

❌ MH/MH

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/MH (Carrier)

MH/MH (Affected)

DNA Test FAQ

What does this DNA test detect?

This DNA test detects the mutation associated with Canine Malignant Hyperthermia (MH) 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 Dominant.

Which mutation is analysed in this test?

This test analyses the mutation RYR1 c.1643T>C.

Is a carrier animal necessarily affected?

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

References

Roberts M C, Mickelson J R, Patterson E E, Nelson T E, Armstrong P J, Brunson D B, Hogan K. Autosomal dominant canine malignant hyperthermia is caused by a mutation in the gene encoding the skeletal muscle calcium release channel (RYR1). Anesthesiology. 2001 Sep;95(3):716-25. doi: 10.1097/00000542-200109000-00026.

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