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SMA (Spinal Muscular Atrophy )
Test number: 8123 (this test number replaces the old 8118CGD)
Gene: SMA Price: £ 48.00 (including VAT)
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The Disease |
SMA is a disorder caused by death of spinal cord neurons that activate skeletal muscles of the trunk and limbs. Loss of neurons in the first few months of life leads to muscle weakness and atrophy that first becomes apparent at 3-4 months of age.
Affected kittens develop an odd gait with a sway of the hindquarters and stand with the hocks nearly touching. They may also stand with toes out in the front.
By 5-6 months of age they are too weak in the hindquarters to readily jump up on furniture and often have a clumsy landing when jumping down. The long hair Maine Coon cats may hide it, but careful feeling of the limbs will reveal reduced muscle mass.
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Description |
By DNA testing, the responsible mutation can be shown directly. This method provides a test with a very high accuracy and can be done at any age. It offers the possibility to distinguish not only between affected and clear cats, but also to identify clinically healthy carriers. This is an essential information for controlling the disease in the breed, as carriers are able to spread the disease in the population, but can not be identified by means of common laboratory diagnostic.
To ensure maximum test reliability, the test is always performed in two independent test runs per sample.
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Trait of Inheritance |
SMA is inherited as an autosomal recessive trait. So there are three conditions a cat can be: it can be clear or homozygous normal (genotype N/N) meaning that it does not carry the mutation and will not develop SMA. Since it also cannot pass the mutation onto its offspring, it can be mated to any other cat.
A cat which has one copy of the gene with the mutation and one copy without the mutation is called a carrier or heterozygous (genotype N/SMA); while it will not be affected by SMA, it can pass the mutation onto its offspring and should therefore only be mated to clear cats.
Affected kitten have two gene copies with the mutation (genotype SMA/SMA or homozygous affected); they will always pass the mutated gene onto their offspring.
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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 cat is noncarrier of the mutant gene.
It is very unlikely that the cat will develop SMA (Spinal Muscular Atrophy ). The cat will never pass the mutation to its offspring, and therefore it can be bred to any other cat.
Carrier
Genotype: N / SMA [ Heterozygous ]
The cat carries one copy of the mutant gene and one
copy of the normal gene.
It is very unlikely that the cat will develop SMA (Spinal Muscular Atrophy ) 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 cats. Avoid breeding carrier to carrier because 25% of their offspring is expected to be affected (see table above)
Affected
Genotype: SMA / SMA [ Homozygous mutant ]
The cat carries two copies of the mutant gene and
therefore it will pass the mutant gene to its entire offspring.
The cat is likely to develop SMA (Spinal Muscular Atrophy ) 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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See also: |
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HCM 1 (Hypertrophic Cardiomyopathy)
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Osteochondrodysplasia (Scottish Fold Osteodystrophy) OCD
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HCM (Hypertrophic Cardiomyopathy HCM3/HCR)
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PKD (Feline Polycystic Kidney Disease)
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PK Deficiency (Pyruvate Kinase Deficiency)
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Progressive Retinal Atrophy ( rdAc - PRA )
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Serological Evaluation of blood Groups
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Hypokalemia / Familial Episodic Hypokalaemic Polymyopathy (BHK)
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Head Defect (BHD)
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Alpha-Mannosidosis (AMD)
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Congenital Myasthenic Syndrome (CMS) / Hereditary Myopathy
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Gangliosidosis GM1
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Gangliosidosis GM2
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Gangliosidosis GM2
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Mucopolysaccharidosis Type VI (MPS VI MPS6)
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Mucopolysaccharidosis type VII (MPS VII / MPS7)
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Myotonia Congenita (Fainting Goat)
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Progressive Retinal Atrophy (pd-PRA)
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Progressive Retinal Atrophy (rdy-PRA)
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Hypotrichosis and Short Life Expectancy
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Progressive Retinal Atrophy in Bengal (PRA-b / b-PRA)
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Special Offer: HCM, HCR, GSD4, PKD, PRA, PK-Def., SMA, Blood Groups
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Primary Congenital Glaucoma (PCG)
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Cystinuria (Feline Cystinuria) (CY)
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Persian DNA bundle (PKD + pd-PRA + AMD + Blood Groups)
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British Short / Long Hair DNA bundle (PKD + pd-PRA + ALPS + Blood Groups)
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Burmese DNA bundle (Hypokalemia (BHK) + Head Defect + Gangliosidosis (GM2) + Blood Groups
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Birma DNA bundle (PKD + pd-PRA + Hypotrichiose + MPS6 + Blood Groups)
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Bengal DNA bundle (rdAc-PRA + b-PRA + PK-Def + Blood groups)
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Maine Coon DNA bundle (HCM1 + SMA + PK-Def + FXI + Blood Groups)
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Ragdoll DNA bundle (HCM1 + HCM3 + PKD + pd-PRA + Blood groups)
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Norwegian Forest DNA bundle (PK-Def + Amber + GSD4 + Blood groups)
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Siamese / Oriental DNA bundle (GM1 + MPS6 + PCG + rdAc-PRA + Blood Groups)
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Sphynx DNA bundle (HCM4 + Hypokalemia + CMS + Blood groups)
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Acrodermatitis enteropathica in Felis catus
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Factor XI deficiency ( F11 )
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MDR1 Gene Defect
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Skeletal Dysplasia
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Factor 12 FXII cat
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Devon Rex DNA bundle (CMS + Blood Groups + Long Coat + Rex Hair)
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Siberian DNA Bundle (Blood Groups + PK-Def + Dilution + Colourpoint)
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Genetic Blood groups in cats
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LABOGenetics XXL Cat - Comprehensive Feline DNA bundle
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Autoimmune Lymphoproliferative Syndrome (ALPS)
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Polydactyly (extra toes) / polydactylism / Polydactyl / hyperdactyly
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Unlisted DNA test
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Congenital Hypothyroidism (CH)
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Maine Coon 8 DNA tests bundle (HCM, SMA, PKDef, Poly, b, b1, cb, cs)
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Blue Eyes
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HCM4 ( Hypertrophic Cardiomyopathy HCM 4) in Sphynx
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Polycystic Kidney Disease 2 (PKD2)
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Glycogen Storage Disease ( GSD ) Type IV
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