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Cone Degeneration (CD) by OptiGen *

Test number: 8256

CD

Breeds
Australian Shepherd , German Shorthair Pointer , Alaskan Malamute .
Kennel Club
This test is part of the Official UK Kennel Club DNA Testing Scheme in Alaskan Malamute.
The Disease
Although the disease is rare in general, within an affected line it is important to control the gene frequency so as to prevent producing puppies affected with the disease. The mutations causing CD in these two breeds occur in the same gene (CNGB3) but are distinct mutations and arose separately.

CD disease causes day blindness due to degeneration of the retinal “cones” – cone-shaped cells in the retina that respond primarily to bright daylight. CD can be diagnosed in the early weeks of the affected dog’s life. Between 8 and 12 weeks of age, when retinal development is normally completed in dogs, signs of vision problems are noticeable. The pups become day-blind and are photophobic – meaning that exposure to bright light is irritating or even painful. The pup will shun brightly-lit areas. Vision in dim light remains normal. The retina of the affected dog initially appears normal when examined by an ophthalmologist and initially the ERG (electroretinogram) recording is normal. However, the ERG response from the degenerating cones declines with age and is non-recordable in the mature CD-affected dog.

In contrast to PRA (Progressive Retinal Atrophy), which is the more common type of retinal disease in many dog breeds, CD does not affect night vision. A second type of cell in the retina, the “rods” – rod-shaped cells that respond primarily to dim light and detect movement – are not involved in this disease. The CD-affected dog keeps the ability to see at night or in dimly-lit areas.

Just as PRA is the canine version of human RP (retinitis pigmentosa), CD is the canine version of the human genetic disease achromatopsia – total color blindness and day-blindness. Another name for day blindness is “hemerolopia.” Exciting gene therapy research aimed at correcting this condition (in dogs as a model for human disease) is currenty being conducted at the University of Pennsylvania.

Reliable identification of dogs that do not carry disease genes is the key to controlling autosomal recessive diseases. The OptiGen CD test enables 100% accurate identification of these dogs. Called "genetically clear," "noncarriers" or, more formally, "homozygous normals," such dogs can pass only the normal gene on to all their pups - which means that none of their pups can ever be affected with CD. These "clear" dogs can be bred to any mate, even to a CD-affected German Shorthaired Pointer, which may be a desirable breeding prospect for other reasons.

Trait of Inheritance
.

Inheritance : AUTOSOMAL RECESSIVE trait


 

Sire

 

Dam

 

Offspring

         
clear
clear
100% clear
         
clear
carrier
50%  clear + 50% carriers
         
clear
affected
100% carriers
         
carrier
clear
50%  clear + 50% carriers
         
carrier
carrier
25% clear + 25% affected + 50% carriers
         
carrier
affected
50% carriers + 50% affected
         
affected
clear
100%  carriers
         
affected
carrier
50% carriers + 50% affected
         
affected
affected
100% affected

 


Clear

Genotype: N / N [ Homozygous normal ]

The dog is noncarrier of the mutant gene.

It is very unlikely that the dog will develop Cone Degeneration (CD) by OptiGen *. The dog will never pass the mutation to its offspring, and therefore it can be bred to any other dog.

 

Carrier

Genotype: N / CD [ 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 Cone Degeneration (CD) by OptiGen * 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: CD / CD [ 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 Cone Degeneration (CD) by OptiGen * and will pass the mutant gene to its entire offspring
Sample Requirements
Buccal Swabs or 0.5 - 1 ml blood in EDTA Blood Tube Buccal swabs or 0.5 - 1 ml blood in EDTA Blood Tube .
Turnaround
4 - 5 weeks
Price
£ 168.00 (including VAT)

To order:

  • Download Order Form from this link pdf

  • Complete the order form and send it together with your samples to the following address:

    Laboklin (UK),   125 Northenden Road, Manchester, M33 3HF

See Also:
Copper Toxicosis (Copper Storage Disease )  
Progressive Retinal Atrophy (Dominant PRA)  
Globoid Cell Leukodystrophy (Krabbe Disease)  
CSNB (Congenital Stationary Night Blindness)  
CLAD (Canine Leukocyte Adhesion Deficiency)  
Cystinuria  
von Willebrand disease Type II (vWD II)  
PK Deficiency (Pyruvate Kinase Deficiency)  
Fucosidosis  
PFK Deficiency (Phosphofructokinase deficiency)  
Myotonia Congenita  
MH (Malignant Hyperthermia)  
X-Linked Severe Combined Immunodeficiency (X-SCID)  
GM1-Gangliosidosis  
Narcolepsy  
Muscular Dystrophy (MD)  
MPS ( Mucopolysaccharidosis type VII)  
Hereditary Myopathy / Centronuclear Myopathy (HMLR, CNM)  
Canine Cyclic Neutropenia (Gray Collie Syndrome)  
Progressive Retinal Atrophy (cord1- PRA)not recommended for diagnosis  
L-2-HGA ( L- 2 - hydroxyglutaric aciduria )  
von Willebrand disease Type I (vWD I)  
von Willebrand disease Type III (vWD III)  
Neuronal Ceroid Lipofuscinosis ( CL / NCL )  
Trapped Neutrophil Syndrome ( TNS )  
Progressive Retinal Atrophy (crd PRA)  
PDP 1 Deficiency (Pyruvate Dehydrogenase Phosphatase 1 Deficiency)  
Factor VII Deficiency  
Progressive Retinal Atrophy (rcd1 PRA)  
Progressive Retinal Atrophy (rcd3 PRA)  
Progressive Retinal Atrophy (rcd1a PRA)  
MDR1 Gene Defect / Ivermectin Sensitivity *  
Exercise Induced Collapse ( EIC )  
Dwarfism (Pituitary Dwarfism / Hypopituitarism)  
Degenerative Myelopathy / Degenerative Radiculomyelopathy) DM (Exon 2)  
Greyhound Neuropathy (Hereditary Neuropathy)  
Brittle Bone Disease (Osteogenesis Imperfecta)  
Glycogen Storage Disease (GSDllla)  
Hereditary Cataract (HSF4)  
Neonatal encephalopathy (NE / NEWS)  
Haemophilia B (factor IX deficiency)  
JEB (Junctional Epidermolysis bullosa)  
Primary Lens Luxation (PLL)  
Brachyury (Bobtail Gene / Short Tail)  
Familial Nephropathy (FN) / Hereditary Nephropathy *  
Startle Disease (SD) / Hyperekplexia  
Familial Nephropathy (FN) / Hereditary Nephropathy  
Myostatin Mutation ("Bully" Whippet)/ Double Muscling  
Hereditary Nephritis / Samoyed Hereditary Glomerulopathy  
Episodic Falling in Cavalier King Charles Spaniel (EF)  
Dry Eye and Curly Coat syndrome (CCS)  
Episodic Falling + Dry Eye Curly Coat syndrome  
Haemophilia A (factor VIII deficiency)  
Congenital Hypothyreosis / hypothyroidism (CHG)  
Hereditary Nasal Parakeratosis (HNPK)  
Juvenile Epilepsy (JE)  
Musladin-Lueke syndrome (MLS)  
Ichthyosis *  
Neonatal Cortical Cerebellar Abiotrophy (NCCD)  
Dwarfism (Skeletal Dysplasia 2)  
Primary Open Angle Glaucoma (POAG)  
Progressive Retinal Atrophy (generalized PRA)  
Progressive Retinal Atrophy (GR-PRA1)  
Progressive retinal atrophy ( rcd4-PRA) / LOPRA  
Alaskan Malamute Polyneuropathy (AMPN / IPAM / HPAM)  
Pug Dog Encephalitis (PDE) / Necrotizing Meningoencephalitis (NME)  
Polycystic Kidney Disease (PKD)  
Pompe's Disease (Glycogen Storage Disease type II / GSDII)  
Primary ciliary dyskinesia (PCD)  
Protein Losing Nephropathy (PLN)  
Late Onset Ataxia (LOA)  
Cobalamin Malabsorption (Imerslund-Gräsbeck syndrome (IGS))  
Collie Eye Anomaly (CEA) / Choroidal Hypoplasia (CH) Option 2 Optigen*  
Retinal Dysplasia (RD) / Oculo Skeletal Dysplasia (OSD)*  
Spinocerebellar ataxia (SCA)  
Cystinuria (Dominant)  
pap-PRA1 (Progressive Retinal Atrophy)  
Progressive Retinal Atrophy (BAS PRA)  
CMSD (Canine Multiple System Degeneration)  
Hereditary Cataract (HSF4) *  
Special offer 4: Juvenile Epilepsy + Furnishing + LSD  
Progressive Retinal Atrophy (prcd-PRA) Option 2: Optigen (8094X)  
Progressive Retinal Atrophy (prcd-PRA) Option 1: (8094P)  
Thrombopathia (Thrombopathy)  
Digital Hyperkeratosis (DH) (Hereditary Footpad Hyperkeratosis / Corny Feet)  
Degenerative Myelopathy / degenerative radiculomyelopathy) DM (Exon 1)  
Degenerative Myelopathy / degenerative radiculomyelopathy) DM (Exon 1 + Exon 2)  
Ectodermal Dysplasia / Skin Fragility Syndrome (ED / SFS)  
Hypomyelination (Shaking Puppy Syndrome) SPS  
Type A PRA * Optigen)  
Late Onset Ataxia (LOA) + Spinocerebellar Attaxia (SCA)  
Late Onset Ataxia (LOA) + Spinocerebellar Attaxia (SCA) + PLL  
Leonberger Polyneuropathy 1 ( LPN1)  
Adult Onset Neuropathy * (AON)  
Hereditary Ataxia (HA)  
Finnish Hound Ataxia / Cerebellar Ataxia (FHA / CAFH)  
Dandy-Walker-Like Malformation (DWLM)  
Persistent Müllerian duct syndrome (PMDS)  
Fanconi Syndrome (FS) *  
Lagotto Storage Disease (LSD)  
Juvenile Laryngeal Paralysis & Polyneuropathy (JLPP)  
Progressive Retinal Atrophy (CNGA1 PRA)  
Achromatopsia (day blindness)  
Progressive Retinal Atrophy (GR-PRA2)  
Unspecified test  
Postoperative Hemorrhage (P2Y12 / P2RY12)  
Glanzmann Thrombasthenia (Thrombasthenia, Thrombasthenic thrombopathia, GT)  
Prekallikrein Deficiency (KTK) / Fletcher Factor Deficiency  
C3 Deficiency (Complement Component 3 deficiency)  
Congenital Myasthenic Syndrome (CMS)  
Bardet Biedl Syndrome (BBS)  
GM2 Gangliosidosis Variant 0 (Sandhoff Disease)  
Macrothrombocytopenia ( MTC-D )  
Renal Cystadenocarcinoma and Nodular Dermatofibrosis (RCND)  
Vitamin D-dependent Rickets (HVDRR)  
Amelogenesis Imperfecta (AI) / Familial Enamel Hypoplasia (FEH)  
X-linked Myotubular Myopathy (XLMTM)  
Collie Eye Anomaly (CEA) / Choroidal Hypoplasia (CH) Option 1*  
Macrothrombocytopenia ( MTC- R )  
Muscular Dystrophy (MDL)  
Mucopolysaccharidosis type IIIa (MPS IIIA)  
Neuroaxonal Dystrophy ( NAD )  
Progressive Retinal Atrophy (rcd2-PRA) Option 1 by Laboklin  
Ichthyosis ( Epidermolytic Hyperkeratosis (EHK) )  
May-Hegglin Anomaly (MHA)  
Alaskan Husky Encephalopathy (AHE)  
Cerebral Dysfunction (CDF)  
Dwarfism ( Chondrodysplasia )  
Ichthyosis (Congenital Ichthyosis / Great Dane Ichthyosis)  
Hemorrhagic Diathesis / Bleeding Diathesis (Canine Scott Syndrom)  
Glycogen storage disease type Ia (GSD Ia) / VON Grieke Disease  
Gallbladder Mucoceles  
Primary Hyperoxaluria type I (PH I)  
Hyperuricosuria / Urate Stones (HUU, SLC)  
Severe Combined Immunodeficiency (SCID)  
Leukocyte Adhesion Deficiency type III (LAD III)  
Cleft Lip / Palate and Syndactyly (CLPS)  
Progressive Retinal Atrophy (crd1 PRA)  
Progressive Retinal Atrophy (CRD2 PRA)  
Spondylocostal Dysostosis (Comma Defect)  
Canine Multi-Focal Retinopathy (CMR)  
Craniomandibular Osteopathy (CMO)  
Retinal Dysplasia (RD) / Oculo Skeletal Dysplasia (OSD)*  
Special Offer: DM (Exon 2) + MDR1  
Special Offer Chinese Crested: PLL + prcd PRA Option 1 + rcd3 PRA + DM Exon 2  
Warbung Micro Syndrome 1 (WARBM1)  
Raine Syndrome  
van den Ende-Gupta Syndrom (VDEGS)  
Lundehund-Syndrome ( Lymphagetasia )  
Obesity / Adiposity ( ADI )  
Alexander Disease (AxD) / Leukodystrophy  
Spinal Dysraphism / Neural Tube Defects ( NTD )  
Spongy Degeneration with Cerebellar Ataxia ( SDCA1 )  
XL - PRA (Progressive retinal Atrophy)  
Nemaline Myopathy (NM)  
Beagle DNA Bundle : IGS + MLS + NCCD + Osteogenesis imperfecta + PK + POAG  
Poodle DNA Bundle: DM exon2 + MH + NE + prcd-PRA option 1 + vWD1  
Golden Retriever DNA bundle: GR-PRA1 + GR-PRA2 + Ichthyosis + prcd-PRA option 1 + Muscular Dystrophy (MD)  
Pug Special Offer: DM Exon2 + MH + PDE / NME + PK + PLL  
Aussie DNA bundle: CEA option * + DM exon2 + HSF4 + MDR1 + MH + NCL + prcd-PRA Option 1*  
Collie DNA Bundle: CEA Option 1 + DM exon2 + HUU (SLC) + MDR1 + rcd2-PRA  
Border Collie DNA Bundle: CEA Option 1 + IGS + MDR1 + MH + NCL + TNS  
Pack A: CNM + DM exon2 + EIC + HNPK + OSD option 1 + prcd-PRA option 1 + SD2  
Pack B: AxD + Cystinuria + Narcolepsy + Obesity + PK + SLC + XL-MTM  
Ichthyosis  
Catalase Deficiency ( CAT ) / Hypocatalasemia / Acatalasia  
Juvenile Myoclonic Epilepsy ( JME )  
Paroxysmal Dyskinesia ( PxD )  
Spongy Degeneration with Cerebellar Ataxia ( SDCA2 )  
Belgian Shepherd Special Offer : SDCA1 + SDCA2  
Sensory Neuropathy ( SN )  
Acute Respiratory Distress Syndrome ( ARDS )  
POAG / PLL Primary Open Angle Glaucoma (POAG) and Primary Lens Luxation (PLL)  

 
 
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