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Laryngeal Paralysis - Polyneuropathy ( LPPN3 )
Test number: 8685
Gene Name: LPPN3
Short Name: LPPN3
Price: £ 48.00 (including VAT)
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Breeds
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Great Dane
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Labrador Retriever
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Leonberger
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St. Bernard
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Kennel Club
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This test is part of the Official UK Kennel Club DNA Testing Scheme in Leonberger.
for UK registered dogs, Laboklin can send results of the tests which are part of the Official UK Kennel Club DNA testing scheme to the Kennel Club (KC) to be recorded and published
as part of the Kennel Club scheme. Results will only be recorded and published by the KC if the result report includes the dog’s
microchip or tattoo number along with either the dog’s registered name or registered number. Any test results that do not carry these identifying
features will not be recorded by the Kennel Club.
In order to ensure that test results are sent to the Kennel Club, customers must also sign the declaration section on the order form to give Laboklin permission to do so.
important:
When you sign the declaration, Laboklin will send the results to the KC on your behalf, and you do not need to send them to the KC yourself again to avoid unnecessary duplications.
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Description |
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The LPPN3 is another mutation that causes Laryngeal Paralysis - Polyneuropathy in Leonberger. It has also been found in Labrador Saint Bernard. Affected leonberger puppies usually develop severe symptoms of laryngeal paralysis at young age including breathing difficulty which is often loud and gagging, difficulty in swallowing food, hanges in barking frequency and quality, high-stepping and uncoordinated gait, stumbling and tripping, exercise intolerance, and muscle atrophy. Symptoms and Impact
Affected Leonberger puppies often develop severe symptoms at an early age, including:
- Breathing difficulties, often accompanied by loud, gagging sounds
- Trouble swallowing food
- Changes in barking, such as hoarseness or altered frequency
- Uncoordinated gait, high-stepping movement, stumbling, and tripping
- Muscle atrophy and exercise intolerance
These symptoms are caused by degeneration and atrophy of the muscles that control laryngeal function, leading to impaired airflow in and out of the trachea. This results in noisy breathing, wheezing, and a characteristic roaring sound (stridor) in affected dogs.
Genetic Basis and Disease Progression
The LPPN3 mutation in the CNTNAP1 gene disrupts nerve function, leading to polyneuropathy. While most cases have been documented in Leonbergers, researchers have also identified affected Labrador Retrievers and Saint Bernards, showing variations in age of onset and severity.
In Leonberger there two more mutations known to cause the disease LPN1 and LPN2, the three tests are recommended for complete diagnosis:
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Trait of Inheritance |
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LPPN3 is inherited in autosomal recessitive mode which means that two copies of the mutation are required for the dog to develop symptoms of the disease
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Inheritance : AUTOSOMAL
RECESSIVE
trait
Sire
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Dam
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Offspring
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clear
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clear
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100% clear
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clear
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carrier
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50% clear + 50%
carriers
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clear
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affected
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100% carriers
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carrier
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clear
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50% clear + 50%
carriers
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carrier
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carrier
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25% clear + 25% affected
+ 50% carriers
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carrier
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affected
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50% carriers + 50%
affected
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affected
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clear
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100% carriers
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affected
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carrier
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50% carriers + 50%
affected
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affected
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affected
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100% affected
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Clear
Genotype: N / N [ Homozygous normal ]
The dog is noncarrier of the mutant gene.
It is very unlikely that the dog will develop Laryngeal Paralysis - Polyneuropathy ( LPPN3 ). The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.
Carrier
Genotype: N / LPPN3 [ Heterozygous ]
The dog carries one copy of the mutant gene and one
copy of the normal gene.
It is very unlikely that the dog will develop Laryngeal Paralysis - Polyneuropathy ( LPPN3 ) but since it carries the mutant gene, it can pass it on to its offspring with the probability of 50%. Carriers should only be bred to clear dogs. Avoid breeding carrier to carrier because 25% of their offspring is expected to be affected (see table above)
Affected
Genotype: LPPN3 / LPPN3 [ Homozygous mutant ]
The dog carries two copies of the mutant gene and
therefore it will pass the mutant gene to its entire offspring.
The dog is likely to develop Laryngeal Paralysis - Polyneuropathy ( LPPN3 ) and will pass the mutant gene to its entire offspring
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Price
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£ 48.00 (including VAT)
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