--- license: permission_granted topic_id: companion_breed_health_lapponian_herder_omia4473_dog category: companion-breed-health title: "Lapponian Herder — Retinal atrophy, progressive, IFT122-related (hereditary; OMIA-verified breed predisposition)" lang: en source: "OMIA (Online Mendelian Inheritance in Animals, University of Sydney) breed-specific hereditary-disorder record, saved verbatim to source_file; C1 substring-verified. Pulled 2026-08-02 from local OMIA database dump." source_file: pdf-raw/breed-health/lapponian_herder_omia4473_4473.txt date_parsed: 2026-08-02 tokens_estimated: 591 verification: method: substring_match claims: 6 passed: 6 date: 2026-08-02 recovered: false path: companion-breed-health/companion_breed_health_lapponian_herder_omia4473_dog/01_companion_breed_health_lapponian_herder_omia4473_dog.md source_document: "OMIA — Online Mendelian Inheritance in Animals (University of Sydney)" citation: authority: "OMIA — Online Mendelian Inheritance in Animals (University of Sydney)" title: "Lapponian Herder — Retinal atrophy, progressive, IFT122-related (hereditary; OMIA-verified breed predisposition)" url: "https://omia.org/OMIA002320/9615/" retrieved: "2026-08-02" ref: "OMIA breed-specific hereditary-disorder records (omia.org), derived from local OMIA database dump; dataset: https://doi.org/10.25910/2AMR-PV70" doc_type: "academic animal-genetics database (breed-specific disorder entries)" needs_review: false
Lapponian Herder — Retinal atrophy, progressive, IFT122-related (hereditary; OMIA-verified breed predisposition)
Source: first-hand OMIA (University of Sydney) breed-specific hereditary-disorder record, saved verbatim to source_file; every claim below is a C1 byte-substring of it.
Claims
Breed: Lapponian Herder (Dog)Disorder:Mode of inheritance: Autosomal recessiveSummary: Kaukonen et al. (2021): Retinitis pigmentosa (RP) is a blinding eye disease affecting nearly two million people worldwide. Dogs are affected with a similar illness termed progressive retinal atrophy (PRA). Lapponian herders (LHs) are affected with several types of inherited retinal dystrophies, and variants in PRCD and BEST1 genes have been associated with generalized PRA and canine multifocal retinopathy 3 (cmr3), respectively. However, all retinal dystrophy cases in LHs are not explained by these variants ... . We report here a recessive missense variant in IFT122 as a candidate causal variant for a novel canine RP model ... .Clin feat: Kaukonen et al. (2021): examinations had revealed clinical findings compatible with generalized PRA in 10 LHs (five males, five females), as these dogs presented with bilateral, diffuse tapetal hyperreflectivity and vessel attenuation. Two of the 10 cases were only examined as young or middle-aged adults (at 1.9 and 5.1 years of age) when they exhibited only mild fundus changes and were therefore diagnosed to have “PRA suspected”. The remaining eight dogs were also examined later in life and had been diagnosed as “PRA affected” at an average age of 9.0 years (± SD 2.9). Typical early findings included night blindness and diffuse tapetal hyperreflectivity. Disease progression was slow as some of the affected dogs still had some visual capacity left at 13 years. All the cases were genotyped for the PRCD p.C2Y and the cmr3 (p.P463fs, p.G489V) variants ... . Of the 10 cases, all were wild-type for the PRCD variant, while four were wild-type and six heterozygous for the two cmr3 variants ... . Spectral-domain optical coherence tomography (SD-OCT) was performed ... . The thicknesses of the whole retina with the retinal pigment epithelium (RPE) and outer retinal layers, including outer nuclear layer, inner segments and outer segments of photoreceptors, and RPE, were severely reduced in the affected dog ... . Interestingly, the photoreceptor layer was not completely lost despite the dog’s old age ... . Apart from the ocular signs, all three dogs were clinically healthy.Defect: yes
Associated gene(s)
Derived from OMIA database dump (omia.xml, local); structured field, not verbatim prose. First-hand values below are verbatim substrings of the topic's pdf-raw/omia/<phene_id>.txt source file.
- Gene: Entrez Gene ID 388244977 (no symbol in OMIA GeneSynonym) — OMIA Phene_Gene
- OMIA molecular-genetics note: Kaukonen et al. (2021): "whole-genome sequencing of an affected LH [Lapponian Herders] revealed a missense variant, c.3176G>A, in the intraflagellar transport 122 (IFT122) gene. The variant was also found in Finnish Lapphunds, in which its clinical relevancy needs to be studied further. The variant interrupts a highly conserved residue, p.(R1059H)."
Evidence (references)
Derived from OMIA database dump (omia.xml, local); structured field, not verbatim prose. First-hand values below are verbatim substrings of the topic's pdf-raw/omia/<phene_id>.txt source file.
- 2021. A missense variant in IFT122 associated with a canine model of retinitis pigmentosa. Hum Genet — PubMed:PMID33606121 | DOI:10.1007/s00439-021-02266-3 — OMIA Phene_Article / Article
- 2021. The Blue Book: Ocular disorders presumed to be inherited in purebred dogs. 13th Edition. https://ofa.org/wp-content/uploads/2022/10/ACVO-Blue-Book-2021.pdf — OMIA Phene_Article / Article
- 2024. Consensus guidelines for nomenclature of companion animal inherited retinal disorders. Vet Ophthalmol — PubMed:PMID38334230 | DOI:10.1111/vop.13185 — OMIA Phene_Article / Article
Comparative medicine (human OMIM)
Derived from OMIA database dump (omia.xml, local); structured field, not verbatim prose. First-hand values below are verbatim substrings of the topic's pdf-raw/omia/<phene_id>.txt source file.
- OMIM:606045 (type: gene) — OMIA Group_OMIM (via OMIA_ID)
- OMIM:218330 (type: trait) — OMIA Group_OMIM (via OMIA_ID)
verification_derived: method: derived_from_dataset source: "OMIA database dump (omia.xml, local); fields Gene/Variant/Article/OMIM" note: "Structured fields (gene, variant rsID/protein change, PubMed/DOI references, OMIM cross-link) extracted from OMIA dump and presented with first-hand values; not verbatim prose."