Ocular albinism

Ocular albinism is a form of albinism which, in contrast to oculocutaneous albinism, presents primarily in the eyes.[1] There are multiple forms of ocular albinism, which are clinically similar.[2]:865

Both known genes are on the X chromosome. When the term "autosomal recessive ocular albinism" ("AROA") is used, it usually refers to mild variants of oculocutaneous albinism rather than ocular albinism, which is X-linked.[3]

## Contents

* 1 Types
* 2 References
* 3 External links

## Types

Name | OMIM | Gene | Description

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|
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Ocular albinism, type 1 (OA1) | Online Mendelian Inheritance in Man (OMIM) 300500 | GPR143 | Also known as Nettleship–Falls syndrome,[4][5][6] is the most common variety of ocular albinism. OA1 is usually associated with nystagmus, and difficult to otherwise detect in females; males show more readily observable symptoms.

## References

1. ↑ "Ocular albinism - Genetics Home Reference". http://ghr.nlm.nih.gov/condition=ocularalbinism.
2. ↑ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. ISBN:0-7216-2921-0.
3. ↑ "A comprehensive genetic study of autosomal recessive ocular albinism in Caucasian patients". Invest. Ophthalmol. Vis. Sci. 49 (3): 868–72. March 2008. doi:10.1167/iovs.07-0791. PMID 18326704.
4. ↑ synd/990 at Who Named It?
5. ↑ E. Nettleship. On some hereditary diseases of the eye. Transactions of the Ophthalmological Societies of the United Kingdom, 1908-1909, 29: 57-198.
6. ↑ H. F. Falls. Sex-linked ocular albinism displaying typical fundal changes in the female heterozygote. American Journal of Ophthalmology, Chicago, 1951, 34: 41-50.

## External links

Classification|

* ICD-10: E70.3
* ICD-10-CM: E70.31
* ICD-9-CM: 270.2
* MeSH: D016117

|

External resources|

* Orphanet: 284804

* GeneReviews/NCBI/NIH/UW entry on Ocular Albinism, X-Linked

* v
* t
* e

Inborn error of amino acid metabolism (E70–E72, 270)

[[Chemistry:Ketogenic amino K→acetyl-CoA]]|

| Lysine/straight chain|

* Glutaric acidemia type 1
* type 2
* Hyperlysinemia
* Pipecolic acidemia
* Saccharopinuria

|

Leucine|

* 3-hydroxy-3-methylglutaryl-CoA lyase deficiency
* 3-Methylcrotonyl-CoA carboxylase deficiency
* 3-Methylglutaconic aciduria 1
* Isovaleric acidemia
* Maple syrup urine disease

Tryptophan|

* Hypertryptophanemia

| G→pyruvate→citrate|

| Glycine|

* D-Glyceric acidemia
* Glutathione synthetase deficiency
* Sarcosinemia

* Glycine]]→Creatine: GAMT deficiency
* Glycine encephalopathy

|

G→glutamate→
α-ketoglutarate|

| Histidine|

* Carnosinemia
* Histidinemia
* Urocanic aciduria

|

Proline|

* Hyperprolinemia
* Prolidase deficiency

Glutamate/glutamine|

* SSADHD

G→propionyl-CoA→
succinyl-CoA|

| Valine|

* Hypervalinemia
* Isobutyryl-CoA dehydrogenase deficiency
* Maple syrup urine disease

|

Isoleucine|

* 2-Methylbutyryl-CoA dehydrogenase deficiency
* Beta-ketothiolase deficiency
* Maple syrup urine disease

Methionine|

* Cystathioninuria
* Homocystinuria
* Hypermethioninemia

General BC/OA|

* Methylmalonic acidemia
* Methylmalonyl-CoA mutase deficiency
* Propionic acidemia

G→fumarate|

| [[Chemistry:PhenylPhenylalanine]]/tyrosine|

| Phenylketonuria|

* 6-Pyruvoyltetrahydropterin synthase deficiency
* Tetrahydrobiopterin deficiency

|

Tyrosinemia|

* Alkaptonuria/Ochronosis
* Tyrosinemia type I
* Tyrosinemia type II
* Tyrosinemia type III/Hawkinsinuria

Tyrosine→Melanin|

* Albinism: Ocular albinism (1)
* Oculocutaneous albinism (Hermansky–Pudlak syndrome)
* Waardenburg syndrome

Tyrosine→Norepinephrine|

* Dopamine beta hydroxylase deficiency
* reverse: Brunner syndrome

G→oxaloacetate|

| Urea cycle/Hyperammonemia
(arginine

* aspartate)

* Argininemia
* Argininosuccinic aciduria
* Carbamoyl phosphate synthetase I deficiency
* Citrullinemia
* N-Acetylglutamate synthase deficiency
* Ornithine transcarbamylase deficiency/translocase deficiency

|

Transport/
IE of RTT|

* Solute carrier family: Cystinuria
* Hartnup disease
* Iminoglycinuria
* Lysinuric protein intolerance

* Fanconi syndrome: Oculocerebrorenal syndrome]]
* Cystinosis

Other|

* 2-Hydroxyglutaric aciduria
* Aminoacylase 1 deficiency
* Ethylmalonic encephalopathy
* Fumarase deficiency
* Trimethylaminuria

* v
* t
* e

Sex linkage: X-linked disorders

X-linked recessive

Immune|

* Chronic granulomatous disease (CYBB)
* Wiskott–Aldrich syndrome
* X-linked severe combined immunodeficiency
* X-linked agammaglobulinemia
* Hyper-IgM syndrome type 1
* IPEX
* X-linked lymphoproliferative disease
* Properdin deficiency

Hematologic|

* Haemophilia A
* Haemophilia B
* X-linked sideroblastic anemia

Endocrine|

* Androgen insensitivity syndrome/Spinal and bulbar muscular atrophy
* KAL1 Kallmann syndrome
* X-linked adrenal hypoplasia congenita

Metabolic|

* Amino acid: Ornithine transcarbamylase deficiency
* Oculocerebrorenal syndrome

* Dyslipidemia: Adrenoleukodystrophy

* Carbohydrate metabolism: Glucose-6-phosphate dehydrogenase deficiency
* Pyruvate dehydrogenase deficiency
* Danon disease/glycogen storage disease Type IIb

* Lipid storage disorder: Fabry's disease

* Mucopolysaccharidosis: Hunter syndrome

* Purine–pyrimidine metabolism: Lesch–Nyhan syndrome

* Mineral: Menkes disease/Occipital horn syndrome

Nervous system|

* X-linked intellectual disability: Coffin–Lowry syndrome
* MASA syndrome
* Alpha-thalassemia mental retardation syndrome
* Siderius X-linked mental retardation syndrome

* Eye disorders: Color blindness (red and green, but not blue)
* Ocular albinism (1)
* Norrie disease
* Choroideremia

* Other: Charcot–Marie–Tooth disease (CMTX2-3)
* Pelizaeus–Merzbacher disease
* SMAX2

Skin and related tissue|

* Dyskeratosis congenita
* Hypohidrotic ectodermal dysplasia (EDA)
* X-linked ichthyosis
* X-linked endothelial corneal dystrophy

Neuromuscular|

* Becker's muscular dystrophy/Duchenne
* Centronuclear myopathy (MTM1)
* Conradi–Hünermann syndrome
* Emery–Dreifuss muscular dystrophy 1

Urologic|

* Alport syndrome
* Dent's disease
* X-linked nephrogenic diabetes insipidus

Bone/tooth|

* AMELX Amelogenesis imperfecta

No primary system|

* Barth syndrome
* McLeod syndrome
* Smith–Fineman–Myers syndrome
* Simpson–Golabi–Behmel syndrome
* Mohr–Tranebjærg syndrome
* Nasodigitoacoustic syndrome

X-linked dominant

* X-linked hypophosphatemia
* Focal dermal hypoplasia
* Fragile X syndrome
* Aicardi syndrome
* Incontinentia pigmenti
* Rett syndrome
* CHILD syndrome
* Lujan–Fryns syndrome
* Orofaciodigital syndrome 1
* Craniofrontonasal dysplasia

* v
* t
* e

Diseases of ion channels

Calcium channel|

| Voltage-gated|

* CACNA1A
* Familial hemiplegic migraine 1
* Episodic ataxia 2
* Spinocerebellar ataxia type-6
* CACNA1C
* Timothy syndrome
* Brugada syndrome 3
* Long QT syndrome 8
* CACNA1F
* Ocular albinism 2
* CSNB2A
* CACNA1S
* Hypokalemic periodic paralysis 1
* Thyrotoxic periodic paralysis 1
* CACNB2
* Brugada syndrome 4

|

Ligand gated|

* RYR1
* Malignant hyperthermia
* Central core disease
* RYR2
* CPVT1
* ARVD2

Sodium channel|

| Voltage-gated|

* SCN1A
* Familial hemiplegic migraine 3
* GEFS+ 2
* Febrile seizure 3A
* SCN1B
* Brugada syndrome 6
* GEFS+ 1
* SCN4A
* Hypokalemic periodic paralysis 2
* Hyperkalemic periodic paralysis
* Paramyotonia congenita
* Potassium-aggravated myotonia
* SCN4B
* Long QT syndrome 10
* SCN5A
* Brugada syndrome 1
* Long QT syndrome 3
* SCN9A
* Erythromelalgia
* Febrile seizure 3B
* Paroxysmal extreme pain disorder
* Congenital insensitivity to pain

|

Constitutively active|

* SCNN1B/SCNN1G
* Liddle's syndrome
* SCNN1A/SCNN1B/SCNN1G
* Pseudohypoaldosteronism 1AR

Potassium channel|

| Voltage-gated|

* KCNA1
* Episodic ataxia 1
* KCNA5
* Familial atrial fibrillation 7
* KCNC3
* Spinocerebellar ataxia type-13
* KCNE1
* Jervell and Lange-Nielsen syndrome
* Long QT syndrome 5
* KCNE2
* Long QT syndrome 6
* KCNE3
* Brugada syndrome 5
* KCNH2
* Short QT syndrome
* KCNQ1
* Jervell and Lange-Nielsen syndrome
* Romano–Ward syndrome
* Short QT syndrome
* Long QT syndrome 1
* Familial atrial fibrillation 3
* KCNQ2
* BFNS1

|

Inward-rectifier|

* KCNJ1
* Bartter syndrome 2
* KCNJ2
* Andersen–Tawil syndrome
* Long QT syndrome 7
* Short QT syndrome
* KCNJ11
* TNDM3
* KCNJ18
* Thyrotoxic periodic paralysis 2

Chloride channel|

* CFTR
* Cystic fibrosis
* Congenital absence of the vas deferens
* CLCN1
* Thomsen disease
* Myotonia congenita
* CLCN5
* Dent's disease
* CLCN7
* Osteopetrosis A2, B4
* BEST1
* Vitelliform macular dystrophy
* CLCNKB
* Bartter syndrome 3

TRP channel|

* TRPC6
* FSGS2
* TRPML1
* Mucolipidosis type IV

Connexin|

* GJA1
* Oculodentodigital dysplasia
* Hallermann–Streiff syndrome
* Hypoplastic left heart syndrome
* GJB1
* Charcot–Marie–Tooth disease X1
* GJB2
* Keratitis–ichthyosis–deafness syndrome
* Ichthyosis hystrix
* Bart–Pumphrey syndrome
* Vohwinkel syndrome)
* GJB3/GJB4
* Erythrokeratodermia variabilis
* Progressive symmetric erythrokeratodermia
* GJB6
* Clouston's hidrotic ectodermal dysplasia

Porin|

* AQP2
* Nephrogenic diabetes insipidus 2

See also: ion channels

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