Not exact matches
All
dogs with AHE were homozygous for this
mutation, 15/41 healthy AH control
dogs were heterozygous carriers while 26/41
normal healthy AH
dogs were wild type.
So, one of the mysteries of Doberman vWD that has puzzled scientists for years, how affected
dogs can end up
with a small amount of completely
normal vWf, is cleared up by understanding this type of
mutation.
Normal kidneys reabsorb the Amino Acid cystine so that only small amounts pass into the urine, while
dogs with mutations of both copies of the SLC3A1 gene fail to reabsorb cystine allowing large amounts to pass into the urine, hence the name cystinuria.
Dogs with two copies of the
mutation have CEA, those
with one are
normal carriers and those
with none are clear.
Dogs affected with Type I vWD have a mutation which allows normal vWF to be produced part of the time, so even dogs with two copies of the defective gene (affected dogs) have some minimal amount of normal
Dogs affected
with Type I vWD have a
mutation which allows
normal vWF to be produced part of the time, so even
dogs with two copies of the defective gene (affected dogs) have some minimal amount of normal
dogs with two copies of the defective gene (affected
dogs) have some minimal amount of normal
dogs) have some minimal amount of
normal vWF.
Normal /
Normal littermates of
dogs with the
mutation, if of equal quality, should be given preference for breeding.
The affected
dogs (A) are homozygous for the dodecamer repeat expansion
mutation with multiple dodecamer repeats, carrier (C)
dogs have the
normal and mutated allele and clear
dogs (WT) have three copies of the repeat [8]
Dogs with the
mutation would best be bred to those that are
Normal /
Normal.
The photoreceptors of
dogs that carry this
mutation develop normally, in contrast to those of
dogs with XLPRA2, and remain morphologically and functionally
normal until young adulthood, indicating the C - terminal of the RPGR protein is not essential for functional and structural differentiation of rods and cones.
In young affected
dogs retinal structure, rhodopsin expression and photoreceptor activation is
normal; disease progression is characterized by regions of initial focal photoreceptor degeneration surrounded by areas of structurally
normal retina, which interestingly is very similar to the phenotypes of humans
with RHO
mutations [24].
Because this material appears to be more abundant in affected Swedish vallhund
dogs compared to other forms of PRA
with primary photoreceptor death or compared to the
normal aging canine retinas, we suspect that the autofluorescent material is intimately associated
with the disease - causing gene
mutation.