O albinismo oculocutâneo tipo 5 (OCA5) é uma forma de albinismo que afeta a pele e os olhos, encontrada até hoje em apenas uma família paquistanesa. Caracteriza-se por pele branca, cabelos dourados, sensibilidade à luz (fotofobia), movimentos involuntários dos olhos (nistagmo), desenvolvimento incompleto da fóvea (uma parte do olho importante para a visão nítida) e visão reduzida. Afeta igualmente homens e mulheres, e sua localização genética foi identificada em uma região do cromossomo 4q24, mas o gene exato responsável ainda não foi descoberto.
Introdução
O que você precisa saber de cara
O albinismo oculocutâneo tipo 5 (OCA5) é uma forma de albinismo que afeta a pele e os olhos, encontrada até hoje em apenas uma família paquistanesa. Caracteriza-se por pele branca, cabelos dourados, sensibilidade à luz (fotofobia), movimentos involuntários dos olhos (nistagmo), desenvolvimento incompleto da fóvea (uma parte do olho importante para a visão nítida) e visão reduzida. Afeta igualmente homens e mulheres, e sua localização genética foi identificada em uma região do cromossomo 4q24, mas o gene exato responsável ainda não foi descoberto.
Escala de raridade
<1/50kMuito rara
1/20kRara
1/10kPouco freq.
1/5kIncomum
1/2k
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Genética e causas
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Os sinais que médicos procuram e os exames que confirmam
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Publicações mais relevantes
Mostrando amostra de 78 publicações de um total de 599
First Report of Oculocutaneous Albinism Type I Among Baka Pygmies From Cameroon.
Oculocutaneous albinism type 1 (OCA1) caused by pathogenic variants of the TYR gene is an autosomal recessive disorder of pigmentation characterized by reduced biosynthesis of melanin pigment in skin, hair, and eyes. We had the opportunity to examine five East Cameroon Baka rainforest hunter-gatherers (historically called "Pygmies") with albinism and belonging to three different families. Screening of known albinism genes revealed a homozygous missense variant in the TYR gene, NM_000372.5: c.1109T>C; p.Met370Thr. In addition, one patient was also hemizygous for a variant in GPR143, the gene involved in ocular albinism (OA1). Another patient was also heterozygous for the common African and Afro-American 2.7-kb deletion in the OCA2 gene indicating admixture of one parent with neighboring Nzimé Bantu-speaking farmers. This is the first report of the occurrence of OCA1 in African rainforest hunter-gatherers.
Choline and CCL22 Are Prognostic Blood Biomarkers for Hermansky-Pudlak Syndrome Pulmonary Fibrosis.
Identifying molecular biomarkers of pulmonary fibrosis (PF) would improve monitoring the disease progression and response to treatment. Hermansky-Pudlak syndrome (HPS)PF is an inherited type of progressive PF with accelerated onset of PF in patients with HPS type 1 (HPS-1). HPSPF could serve as a model to study biomarkers of progressive PF, given that all individuals with HPS-1 eventually develop HPSPF. We used a multiomics strategy to discover progressive blood biomarkers that can recognize factors contributing to the fibrotic cascade in the lungs of individuals with HPS. Metabolomic and cytokine/chemokine profiling were performed on serum samples from patients with HPS-1, HPS-1 with PF (HPSPF), HPS-3, HPS-5, or idiopathic PF and healthy volunteers. Metabolomics, cytokine/chemokine, pulmonary function, and age data from subjects with HPS-1 and HPSPF were integrated into a multiomics network. The analysis highlighted alterations in the transsulfuration pathway, arginine metabolism, and redox balance with the progression of PF in HPS-1. Among those, CCL22 and choline were significantly elevated in HPSPF compared with HPS-1 in two independent cohorts together with age and were associated with decline of pulmonary function. In receiver operating characteristic curve analysis, both CCL22 and choline demonstrated high accuracy in predicting PF in subjects with HPS-1 and therefore could serve as prognostic blood biomarkers of HPSPF. We noted similarity in molecular signatures of CCL22 in progressive idiopathic PF and HPSPF. We found that inducible nitric oxide synthase is an upstream regulator of releasing profibrotic mediators (CCL22, CCL24, IL-18, IL-1α, IL-1β), suggesting the therapeutic potential of inducible nitric oxide synthase inhibition in progressive HPSPF.
Platelet secretion defects and increased CD63 expression in Hermansky-Pudlak syndrome: a case report.
Hermansky-Pudlak syndrome (HPS) is an autosomal recessive disorder characterized by clinical features including oculocutaneous albinism (OCA) and bleeding diathesis due to platelet storage pool deficiency. In this article, we report a 12-year-old boy with recurrent epistaxis who was referred to the Iranian Blood Transfusion Organization (IBTO) reference coagulation laboratory for platelet function analysis. Based on the laboratory diagnostic tests in this study and the patient's clinical presentation, the probability of HPS type 2 is more likely.
A novel HPS3 pathogenic nonsense variant associated with Hermansky-Pudlak syndrome type 3 and a platelet dysfunction.
Hermansky-Pudlak Syndrome (HPS) is a rare autosomal recessive syndromic type of albinism. It is characterized by oculocutaneous hypopigmentation, platelet dysfunction, and variable systemic involvement depending on the specific subtype. To date, eleven distinct HPS types have been identified, with HPS3 being among the milder forms. Clinical and ophthalmic examinations, followed by whole exome sequencing (WES), Sanger sequencing, and segregation analysis, were performed. Here, we report a case of a 26-year-old Lebanese male patient born to consanguineous parents who presented with oculocutaneous albinism without a history of bleeding or other systemic involvement. WES identified a novel homozygous nonsense variant in the HPS3 gene (NM_032383.5): c.998T > A; p.(Leu333Ter) that co-segregated with the phenotype. The platelet function analysis (PFA-100) revealed a prolonged collagen/epinephrine closure time, accompanied by a normal collagen/ADP response. We report one of the very few HPS3 cases in the Middle East and North Africa region (MENA) and the Arab regions, caused by a novel homozygous nonsense variant associated with platelet dysfunction. In contrast to the founder mutations described in Puerto Rican and Ashkenazi Jewish populations, HPS3 cases in this region appear to result from distinct mutational events, indicating the absence of a common ancestral origin.
A recessive coat color dilution in Dexter cattle attributed to a missense mutation in SLC45A2.
Three colors of Dexter cattle are currently recognized: black, red, and dun. In Dexters, dun is determined by a recessive genotype of TYRP1 (b/b) that dilutes an otherwise black animal (MC1R genotype ED/-); this variant does not impact red cattle. A subset of Dexters with dilute coat colors described as dark dun/chocolate (CD) or light dun/cream (CL) were identified. Although phenotypically similar to dun, they did not have the expected TYRP1 b/b genotype. Given relationships among the reported individuals, we hypothesized that a novel recessive genotype is causative of CD on a black background and CL on a red background. Whole-genome sequence was generated from four dilute Dexters (three CD and one CL), and one black calf of a CD dam. None of the cattle sequenced had the TYRP1 b/b genotype. The comparison of variants in the five Dexter cattle to those from 226 non-Dexter control cattle resulted in the identification of a missense variant in SLC45A2 (NC_037347.1: g.39790189A>C; XM_002696386.6: c.398A>C) that fit the proposed hypothesis. Sanger sequencing of additional Dexter cattle (n = 227) demonstrated complete segregation of the recessive genotype with the CD and CL phenotypes. The mutation, predicted to result in a substitution of glutamine with proline (XP_002696432.2: p.Gln133Pro) in a transmembrane helix was classified as deleterious by SIFT. Further supporting its implication, SLC45A2 is responsible for coat color dilutions and oculocutaneous albinism type IV in multiple species. Testing for the SLC45A2 variant can be a valuable resource for Dexter breeders interested in coat color.
Publicações recentes
Multiple metastatic eccrine porocarcinoma with squamous differentiation in oculo-cutaneous albinism.
Hermansky-Pudlak Syndrome Type 3 Complicated by Schizophrenia and Crohn's-Like Colitis.
Haplotype-Based Analysis of OCA2 Variants in Oculocutaneous Albinism.
Quantifying functional vision in a mouse model of oculocutaneous albinism type 1.
The impact of stigma on people with albinism in Africa: a narrative review.
📚 EuropePMC618 artigos no totalmostrando 78
First Report of Oculocutaneous Albinism Type I Among Baka Pygmies From Cameroon.
Pigment cell & melanoma researchA novel HPS3 pathogenic nonsense variant associated with Hermansky-Pudlak syndrome type 3 and a platelet dysfunction.
Molecular biology reportsA recessive coat color dilution in Dexter cattle attributed to a missense mutation in SLC45A2.
Animal geneticsGenetic Diagnosis of Oculocutaneous Albinism Type 1A: A Novel TYR Variant.
Clinical case reportsCholine and CCL22 Are Prognostic Blood Biomarkers for Hermansky-Pudlak Syndrome Pulmonary Fibrosis.
American journal of respiratory cell and molecular biologyPlatelet secretion defects and increased CD63 expression in Hermansky-Pudlak syndrome: a case report.
Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosisMultiplexed Assays of Variant Effect and Reclassification of TYR Variants in Chinese Patients with Oculocutaneous Albinism.
The Journal of investigative dermatologyCase report: Inflammatory bowel disease in Hermansky-Pudlak syndrome type 3 due to novel variant in HPS3.
Frontiers in geneticsScreening of Clinical Data of Patients with Abnormal Head Posture and Investigation of Abnormal Head Posture Change After Treatment.
Turkish journal of ophthalmologyEfficient genome editing in medaka (Oryzias latipes) using a codon-optimized SaCas9 system.
Journal of Zhejiang University. Science. BA 65 kilobase deletion of the upstream TYR gene region in a family with oculocutaneous albinism type 1.
GeneEarly diagnosis of immunodeficient patients with partial albinism: The role of hair study and peripheral blood smear.
Pediatric allergy and immunology : official publication of the European Society of Pediatric Allergy and ImmunologyImpairment of Renal Function in Hermansky-Pudlak Syndrome.
American journal of nephrologyAlbinism and Blood Cell Profile: The Peculiar Case of Asinara Donkeys.
Animals : an open access journal from MDPI[Correlation between refraction and axial length in Albinos].
Journal francais d'ophtalmologieComparative transcriptome analysis reveals growth and molecular pathway of body color regulation in turbot (Scophthalmus maximus) exposed to different light spectrum.
Comparative biochemistry and physiology. Part D, Genomics & proteomicsHermansky-Pudlak Syndrome Type 6 and Renal Failure: A Rare Genetic Disease.
Cureus[Diagnosis of a case with Hermansky-Pudlak syndrome type 5 through high-throughput sequencing and a literature review].
Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical geneticsUnsuspected consequences of synonymous and missense variants in OCA2 can be detected in blood cell RNA samples of patients with albinism.
Pigment cell & melanoma researchMutational Analysis of TYR, OCA2, SLC45A2, and TYRP1 Genes Identifies Novel and Reported Mutations in Chinese Families with Oculocutaneous Albinism.
Alternative therapies in health and medicineIdentification and characterization of the compound heterozygous variants of TYR gene in a northern Chinese family with Oculocutaneous albinism type 1.
Pigment cell & melanoma researchA review of treatment of port-wine stains with pulsed dye laser in fitzpatrick skin type IV-VI.
Archives of dermatological researchLow-vision intervention for oculocutaneous albinism in a Tertiary Eye Care Hospital in India.
Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological Society[Clinical and molecular genetic analysis of Angelman syndrome with oculocutaneous albinism type 2: A case report and literature review].
Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciencesIn vitro characterization of the intramelanosomal domain of human recombinant TYRP1 and its oculocutaneous albinism type 3-related mutant variants.
Protein science : a publication of the Protein SocietyHermansky-Pudlak syndrome presenting with paranoid delusion.
CNS spectrumsOcular findings and a comparative study of hair, skin and iris color in Chinese patients with albinism.
Ophthalmic geneticsMolecular genetic characterization of Congolese patients with oculocutaneous albinism.
European journal of medical geneticsDermatologic manifestations in patients with the Hermansky-Pudlak syndrome types 1 and 3.
Orphanet journal of rare diseasesAP-3 complex subunit delta gene, ap3d1, regulates melanogenesis and melanophore survival via autophagy in zebrafish (Danio rerio).
Pigment cell & melanoma researchAxial Length Distributions in Patients With Genetically Confirmed Inherited Retinal Diseases.
Investigative ophthalmology & visual scienceIdentification and characterization of two novel noncoding tyrosinase (TYR) gene variants leading to oculocutaneous albinism type 1.
The Journal of biological chemistryLung Transplantation for Pulmonary Fibrosis Associated With Hermansky-Pudlak Syndrome. A Single-center Experience.
Transplantation directProtein Biochemistry and Molecular Modeling of the Intra-Melanosomal Domain of Human Recombinant Tyrp2 Protein and OCA8-Related Mutant Variants.
International journal of molecular sciencesHermansky-Pudlak Syndrome: Identification of Novel Variants in the Genes HPS3, HPS5, and DTNBP1 (HPS-7).
Frontiers in pharmacologyLong-term vision outcomes for patients with albinism and diabetic retinopathy.
Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle OphthalmologieThe Phenotypic and Mutational Spectrum of the FHONDA Syndrome and Oculocutaneous Albinism: Similarities and Differences.
Investigative ophthalmology & visual scienceGenetic Variability in Slovenian Cohort of Patients with Oculocutaneous Albinism.
Acta chimica SlovenicaImpact of a SLC24A5 variant on the retinal pigment epithelium of a Japanese patient with oculocutaneous albinism type 6.
Pigment cell & melanoma researchTyrp1 Mutant Variants Associated with OCA3: Computational Characterization of Protein Stability and Ligand Binding.
International journal of molecular sciencesWhole-Exome Sequencing Identified a Novel Homozygous Frameshift Mutation of HPS3 in a Consanguineous Family with Hermansky-Pudlak Syndrome.
BioMed research international[Study on TYR gene variant from a pedigree with oculocutaneous albinism].
Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical geneticsINADVERTENT GLOBE PENETRATION AND SUBRETINAL INJECTION OF BOTULINUM TOXIN IN A PATIENT WITH OCULOCUTANEOUS ALBINISM.
Retinal cases & brief reportsGenotype-phenotype associations in Danish patients with ocular and oculocutaneous albinism.
Ophthalmic geneticsThe first Hermansky-Pudlak syndrome type 9 patient with two novel variants in Chinese population.
The Journal of dermatologyInterstitial Pneumonia Secondary to Hermansky-Pudlak Syndrome Type 4 Treated with Different Antifibrotic Agents.
Internal medicine (Tokyo, Japan)Identification of two novel mutations in a Japanese patient with Hermansky-Pudlak syndrome type 5.
The Journal of dermatologyAmelanotic melanoma in a patient with oculocutaneous albinism.
Dermatology online journalA genome-wide scan study identifies a single nucleotide substitution in the tyrosinase gene associated with white coat colour in a red deer (Cervus elaphus) population.
BMC genetics[Analysis of P gene variations among fourteen patients with oculocutaneous albinism type II].
Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical geneticsA novel porcine model reproduces human oculocutaneous albinism type II.
Cell discovery[Upper crossed syndrome of muscle imbalance in adolescents with tension-type headache].
Zhurnal nevrologii i psikhiatrii imeni S.S. KorsakovaGenome of the Malawi golden cichlid fish (Melanochromis auratus) reveals exon loss of oca2 in an amelanistic morph.
Pigment cell & melanoma researchModeling human point mutation diseases in Xenopus tropicalis with a modified CRISPR/Cas9 system.
FASEB journal : official publication of the Federation of American Societies for Experimental BiologyBleeding assessment in female patients with the Hermansky-Pudlak syndrome-A case series.
European journal of haematologyMild form of oculocutaneous albinism type 1: phenotypic analysis of compound heterozygous patients with the R402Q variant of the TYR gene.
The British journal of ophthalmologyThe Molecular Basis of Chemical Chaperone Therapy for Oculocutaneous Albinism Type 1A.
The Journal of investigative dermatologyPredictable and precise template-free CRISPR editing of pathogenic variants.
NatureIn silico screening of deleterious single nucleotide polymorphisms (SNPs) and molecular dynamics simulation of disease associated mutations in gene responsible for oculocutaneous albinism type 6 (OCA 6) disorder.
Journal of biomolecular structure & dynamicsWidespread dynamic and pleiotropic expression of the melanocortin-1-receptor (MC1R) system is conserved across chick, mouse and human embryonic development.
Birth defects researchGene-edited MLE-15 Cells as a Model for the Hermansky-Pudlak Syndromes.
American journal of respiratory cell and molecular biology[Clinical manifestation and gene analyses of 15 patients with intellectual disability or developmental delay complicated with congenital nystagmus].
Zhonghua er ke za zhi = Chinese journal of pediatricsOCA2 splice site variant in German Spitz dogs with oculocutaneous albinism.
PloS oneA single base deletion in the SLC45A2 gene in a Bullmastiff with oculocutaneous albinism.
Animal geneticsTwo Variants in SLC24A5 Are Associated with "Tiger-Eye" Iris Pigmentation in Puerto Rican Paso Fino Horses.
G3 (Bethesda, Md.)Clinico-molecular analysis of eleven patients with Hermansky-Pudlak type 5 syndrome, a mild form of HPS.
Pigment cell & melanoma researchCellular and molecular defects in a patient with Hermansky-Pudlak syndrome type 5.
PloS oneA Japanese Family With Autosomal Dominant Oculocutaneous Albinism Type 4.
Investigative ophthalmology & visual scienceA new type of syndromic albinism associated with mutations in AP3D1.
Pigment cell & melanoma researchA cross-sectional examination of visual acuity by specific type of albinism.
Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and StrabismusLarge-Scale Recombinant Expression and Purification of Human Tyrosinase Suitable for Structural Studies.
PloS onePhacoemulsification and intraocular lens implantation in patients with oculocutaneous albinism.
Ophthalmic geneticsPosterior staphyloma in oculocutaneous albinism: another possible cause of reduced visual acuity.
Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and StrabismusCytoplasmic Control of Sense-Antisense mRNA Pairs.
Cell reportsPrenatal genotyping of four common oculocutaneous albinism genes in 51 Chinese families.
Journal of genetics and genomics = Yi chuan xue baoTwo novel splicing mutations in the SLC45A2 gene cause Oculocutaneous Albinism Type IV by unmasking cryptic splice sites.
Journal of human geneticsRefractive errors, visual impairment, and the use of low-vision devices in albinism in Malawi.
Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle OphthalmologieDefective PDI release from platelets and endothelial cells impairs thrombus formation in Hermansky-Pudlak syndrome.
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Referências e fontes
Bases de dados externas citadas neste artigo
Publicações científicas
Artigos indexados no PubMed ligados a esta doença no grafo RarasNet — título, periódico e PMID direto da fonte, sem intermediação de IA.
- First Report of Oculocutaneous Albinism Type I Among Baka Pygmies From Cameroon.
- Choline and CCL22 Are Prognostic Blood Biomarkers for Hermansky-Pudlak Syndrome Pulmonary Fibrosis.
- Platelet secretion defects and increased CD63 expression in Hermansky-Pudlak syndrome: a case report.Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis· 2025· PMID 40333031mais citado
- A novel HPS3 pathogenic nonsense variant associated with Hermansky-Pudlak syndrome type 3 and a platelet dysfunction.
- A recessive coat color dilution in Dexter cattle attributed to a missense mutation in SLC45A2.
- Multiple metastatic eccrine porocarcinoma with squamous differentiation in oculo-cutaneous albinism.
- Hermansky-Pudlak Syndrome Type 3 Complicated by Schizophrenia and Crohn's-Like Colitis.
- Haplotype-Based Analysis of OCA2 Variants in Oculocutaneous Albinism.
- Quantifying functional vision in a mouse model of oculocutaneous albinism type 1.
- The impact of stigma on people with albinism in Africa: a narrative review.
Bases de dados e fontes oficiais
Identificadores e referências canônicas usadas para montar este verbete.
- ORPHA:370091(Orphanet)
- OMIM OMIM:615312(OMIM)
- MONDO:0014127(MONDO)
- GARD:17598(GARD (NIH))
- Busca completa no PubMed(PubMed)
- Artigo Wikipedia(Wikipedia)
Dados compilados pelo RarasNet a partir de fontes abertas (Orphanet, OMIM, MONDO, PubMed/EuropePMC, ClinicalTrials.gov, DATASUS, PCDT/MS). Este conteúdo é informativo e não substitui avaliação médica.
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