Raras
Buscar doenças, sintomas, genes...
Fenilcetonúria
ORPHA:716CID-10 · E70.0CID-11 · 5C50.0OMIM 261600PCDT · SUSDOENÇA RARA

Fenilcetonúria (FCU) é um dos problemas genéticos mais comuns que afetam a forma como o corpo processa os aminoácidos e, se não for tratada, pode levar a uma deficiência intelectual que varia de leve a grave.

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Introdução

O que você precisa saber de cara

📋

Fenilcetonúria (FCU) é um dos problemas genéticos mais comuns que afetam a forma como o corpo processa os aminoácidos e, se não for tratada, pode levar a uma deficiência intelectual que varia de leve a grave.

Pesquisas ativas
32 ensaios
185 total registrados no ClinicalTrials.gov
Publicações científicas
6.961 artigos
Último publicado: 2026 Apr 17
Medicamentos
2 registrados
SAPROPTERIN DIHYDROCHLORIDE, SAPROPTERIN

Tem tratamento?

2 medicamentos registrados
Ver detalhes, fases e interações →
SAPROPTERIN DIHYDROCHLORIDESAPROPTERIN

Escala de raridade

CLASSIFICAÇÃO ORPHANET · BRASIL 2024
1-9 / 100 000
Ultra-rara
<1/50k
Muito rara
1/20k
Rara
1/10k
Pouco freq.
1/5k
Incomum
1/2k
Prevalência
10.99
France
Início
Infancy
🏥
SUS: Cobertura completaScore: 100%
PCDT disponível2 medicamentos CEAFTriagem neonatal (Fase 1)Centros em: PA, PR, SC, RS, ES +8CID-10: E70.0
🇧🇷Dados SUS / DATASUS2024
245
internações/ano
R$ 1.520
custo médio/internação
ESTADOS COM MAIS INTERNAÇÕES
SPMGRSPRBA
PROCEDIMENTOS SIGTAP (7)
0202010279
Dosagem de aminoácidos (erros inatos)metabolic_test
0202010295
Dosagem de ácidos orgânicos na urinagenetic_test
0202010490
Teste de triagem para erros inatos do metabolismonewborn_screening
0202010694
Sequenciamento completo do exoma (WES)rehabilitation
0202080013
Teste do pezinho (triagem neonatal)nutritional
0301070040
Atendimento em reabilitação — doenças raras
+1 outros procedimentos
Você se identifica com essa condição?
O Raras está aqui pra te apoiar — com ou sem diagnóstico

Encontrou um erro ou informação desatualizada? Sugira uma correção →

Entender a doença

Do básico ao detalhe, leia no seu ritmo

Preparando trilha educativa...

Sinais e sintomas

O que aparece no corpo e com que frequência cada sintoma acontece

Partes do corpo afetadas

🧠
Neurológico
19 sintomas
😀
Face
8 sintomas
🧬
Pele e cabelo
5 sintomas
🦴
Ossos e articulações
5 sintomas
❤️
Coração
5 sintomas
🫘
Rins
4 sintomas

+ 23 sintomas em outras categorias

Características mais comuns

100%prev.
Aumento do nível de ácido hipúrico na urina
Frequência: 20/20
100%prev.
Nível urinário elevado de gama-glutamilfenilalanina
Frequência: 12/12
90%prev.
Fenilalaninúria
Muito frequente (99-80%)
55%prev.
Convulsão
Frequente (79-30%)
55%prev.
Morfologia anormal da substância branca cerebral
Frequente (79-30%)
55%prev.
Deficiência intelectual, grave
Frequente (79-30%)
76sintomas
Muito frequente (3)
Frequente (14)
Ocasional (10)
Sem dados (49)

Os sintomas variam de pessoa para pessoa. Abaixo estão as 76 características clínicas mais associadas, ordenadas por frequência.

Aumento do nível de ácido hipúrico na urinaIncreased level of hippuric acid in urine
Frequência: 20/20100%
Nível urinário elevado de gama-glutamilfenilalaninaElevated urinary gamma-glutamylphenylalanine level
Frequência: 12/12100%
FenilalaninúriaPhenylalaninuria
Muito frequente (99-80%)90%
ConvulsãoSeizure
Frequente (79-30%)55%
Morfologia anormal da substância branca cerebralAbnormal cerebral white matter morphology
Frequente (79-30%)55%

Linha do tempo da pesquisa

Publicações por ano — veja quando o interesse científico cresceu
Anos de pesquisa1desde 2026
Total histórico6.961PubMed
Últimos 10 anos200publicações
Pico2025139 papers
Linha do tempo
2026Hoje · 2026🧪 1983Primeiro ensaio clínico📈 2025Ano de pico
Publicações por ano (últimos 10 anos)

Triagem neonatal (Teste do Pezinho)

👶
Teste: Fenilalanina em sangue seco (Teste do Pezinho)
Fase 1 do PNTNTriagem nacionalimplemented_nationally
Incidência no Brasil: 1:15.000

A triagem neonatal permite diagnóstico precoce e início imediato do tratamento.

Encontrou um erro ou informação desatualizada? Sugira uma correção →

Genética e causas

O que está alterado no DNA e como passa nas famílias

Genes associados

1 gene identificado com associação a esta condição. Padrão de herança: Autosomal recessive.

PAHPhenylalanine-4-hydroxylaseDisease-causing germline mutation(s) inTolerante
FUNÇÃO

Catalyzes the hydroxylation of L-phenylalanine to L-tyrosine

LOCALIZAÇÃO

VIAS BIOLÓGICAS (1)
Phenylalanine metabolism
MECANISMO DE DOENÇA

Phenylalanine hydroxylase deficiency

An autosomal recessive inborn error of phenylalanine metabolism characterized by intolerance to dietary intake of the essential amino acid phenylalanine. The disease spectrum depends on the degree of PAH deficiency and the phenylalanine levels in plasma. Severe deficiency causes classic phenylketonuria (PKU) that is characterized by plasma concentrations of phenylalanine persistently above 1200 umol/L. PKU patients develop profound and irreversible intellectual disability, unless low phenylalanine diet is introduced early in life. They tend to have light pigmentation, rashes similar to eczema, epilepsy, extreme hyperactivity, psychotic states and an unpleasant 'mousy' odor. Less severe forms of PAH deficiency are characterized by phenylalanine levels above normal (120 umol/L) but below 1200 umol/L and include moderate PKU, mild PKU, non-PKU hyperphenylalaninemia (non-PKU HPA) and mild hyperphenylalaninemia. Individuals with PAH deficiency who have plasma phenylalanine concentrations consistently below 600 umol/L on an unrestricted diet are not at higher risk of developing intellectual, neurologic, and neuropsychological impairment than are individuals without PAH deficiency.

EXPRESSÃO TECIDUAL(Tecido-específico)
Fígado
252.5 TPM
Rim - Córtex
28.6 TPM
Rim - Medula
6.4 TPM
Testículo
4.4 TPM
Pâncreas
3.0 TPM
OUTRAS DOENÇAS (3)
phenylketonuriamaternal phenylketonuriatetrahydrobiopterin-responsive hyperphenylalaninemia/phenylketonuria
HGNC:8582UniProt:P00439

Medicamentos e terapias

SAPROPTERIN DIHYDROCHLORIDEPhase 4

Mecanismo: Phenylalanine-4-hydroxylase activator

SAPROPTERINPhase 3

Mecanismo: Phenylalanine-4-hydroxylase activator

Ver mais no OpenTargets

Variantes genéticas (ClinVar)

1,047 variantes patogênicas registradas no ClinVar.

🧬 PAH: NM_000277.3(PAH):c.1181A>G (p.Asp394Gly) ()
🧬 PAH: NM_000277.3(PAH):c.530T>C (p.Val177Ala) ()
🧬 PAH: NM_000277.3(PAH):c.394G>A (p.Ala132Thr) ()
🧬 PAH: NM_000277.3(PAH):c.266C>G (p.Pro89Arg) ()
🧬 PAH: NM_000277.3(PAH):c.1223G>C (p.Arg408Pro) ()
Ver todas no ClinVar

Classificação de variantes (ClinVar)

Distribuição de 1,556 variantes classificadas pelo ClinVar.

389
622
545
Patogênica (25.0%)
VUS (40.0%)
Benigna (35.0%)
VARIANTES MAIS SIGNIFICATIVAS
PAH: NM_000277.3(PAH):c.1181A>G (p.Asp394Gly) [Pathogenic]
PAH: NM_000277.3(PAH):c.530T>C (p.Val177Ala) [Likely pathogenic]
LOC126861615: NM_000277.3(PAH):c.877T>A (p.Leu293Met) [Likely pathogenic]
PAH: NM_000277.3(PAH):c.512G>A (p.Gly171Glu) [Likely pathogenic]
LOC126861615: NM_000277.3(PAH):c.911A>C (p.Gln304Pro) [Likely pathogenic]

Vias biológicas (Reactome)

2 vias biológicas associadas aos genes desta condição.

Diagnóstico

Os sinais que médicos procuram e os exames que confirmam

Carregando...

Tratamento e manejo

Remédios, cuidados de apoio e o que precisa acompanhar

Pipeline de tratamentos
Pipeline regulatório — de medicamentos já aprovados a drogas em pesquisa exploratória.
Aprovado1
3Fase 34
2Fase 22
1Fase 11
·Pré-clínico14
Medicamentos catalogadosEnsaios clínicos· 2 medicamentos · 20 ensaios
✓ Aprovados — podem ser usados hoje
SAPROPTERIN DIHYDROCHLORIDE
Carregando informações de tratamento...

Onde tratar no SUS

Hospitais de referência no Brasil e o protocolo oficial do SUS (PCDT)

🇧🇷 Atendimento SUS — Fenilcetonúria

Centros de Referência SUS

21 centros habilitados pelo SUS para Fenilcetonúria

Centros para Fenilcetonúria

Detalhes dos centros

Hospital Universitário Prof. Edgard Santos (HUPES)

R. Dr. Augusto Viana, s/n - Canela, Salvador - BA, 40110-060 · CNES 0003808

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do Metabolismo

Hospital de Apoio de Brasília (HAB)

AENW 3 Lote A Setor Noroeste - Plano Piloto, Brasília - DF, 70684-831 · CNES 0010456

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital Estadual Infantil e Maternidade Alzir Bernardino Alves (HIABA)

Av. Min. Salgado Filho, 918 - Soteco, Vila Velha - ES, 29106-010 · CNES 6631207

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital das Clínicas da UFG

Rua 235 QD. 68 Lote Área, Nº 285, s/nº - Setor Leste Universitário, Goiânia - GO, 74605-050 · CNES 2338424

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do Metabolismo

Hospital das Clínicas da UFMG

Av. Prof. Alfredo Balena, 110 - Santa Efigênia, Belo Horizonte - MG, 30130-100 · CNES 2280167

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

NUPAD / Faculdade de Medicina UFMG

Av. Prof. Alfredo Balena, 189 - 5 andar - Centro, Belo Horizonte - MG, 30130-100 · CNES 2183226

Serviço de Referência

Rota
Erros Inatos do Metabolismo

Hospital Universitário João de Barros Barreto

R. dos Mundurucus, 4487 - Guamá, Belém - PA, 66073-000 · CNES 2337878

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital de Clínicas da Universidade Federal de Pernambuco

Av. Prof. Moraes Rego, 1235 - Cidade Universitária, Recife - PE, 50670-901 · CNES 2561492

Atenção Especializada

Rota
Erros Inatos do Metabolismo

Instituto de Medicina Integral Prof. Fernando Figueira (IMIP)

R. dos Coelhos, 300 - Boa Vista, Recife - PE, 50070-902 · CNES 0000647

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital de Clínicas da UFPR

R. Gen. Carneiro, 181 - Alto da Glória, Curitiba - PR, 80060-900 · CNES 2364980

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital Universitário Pedro Ernesto (HUPE-UERJ)

Blvd. 28 de Setembro, 77 - Vila Isabel, Rio de Janeiro - RJ, 20551-030 · CNES 2280221

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do Metabolismo

Instituto Nacional de Saúde da Mulher, da Criança e do Adolescente Fernandes Figueira (IFF/Fiocruz)

Av. Rui Barbosa, 716 - Flamengo, Rio de Janeiro - RJ, 22250-020 · CNES 2269988

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital Universitário Onofre Lopes (HUOL)

Av. Nilo Peçanha, 620 - Petrópolis, Natal - RN, 59012-300 · CNES 2408570

Atenção Especializada

Rota
Erros Inatos do Metabolismo

Hospital São Lucas da PUCRS

Av. Ipiranga, 6690 - Jardim Botânico, Porto Alegre - RS, 90610-000 · CNES 2232928

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do Metabolismo

Hospital de Clínicas de Porto Alegre (HCPA)

Rua Ramiro Barcelos, 2350 Bloco A - Av. Protásio Alves, 211 - Bloco B e C - Santa Cecília, Porto Alegre - RS, 90035-903 · CNES 2237601

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital Universitário da UFSC (HU-UFSC)

R. Profa. Maria Flora Pausewang - Trindade, Florianópolis - SC, 88036-800 · CNES 2560356

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do Metabolismo

Hospital das Clínicas da FMUSP

R. Dr. Ovídio Pires de Campos, 225 - Cerqueira César, São Paulo - SP, 05403-010 · CNES 2077485

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital de Clínicas da UNICAMP

R. Vital Brasil, 251 - Cidade Universitária, Campinas - SP, 13083-888 · CNES 2748223

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Hospital de Clínicas de Ribeirão Preto (HCRP-USP)

R. Ten. Catão Roxo, 3900 - Vila Monte Alegre, Ribeirão Preto - SP, 14015-010 · CNES 2082187

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do MetabolismoDeficiência Intelectual

Instituto da Criança e do Adolescente (ICr-HCFMUSP)

Av. Dr. Enéas Carvalho de Aguiar, 647 - Cerqueira César, São Paulo - SP, 05403-000 · CNES 2081695

Serviço de Referência

Rota
Erros Inatos do Metabolismo

UNIFESP / Hospital São Paulo

R. Napoleão de Barros, 715 - Vila Clementino, São Paulo - SP, 04024-002 · CNES 2688689

Serviço de Referência

Rota
Anomalias CongênitasErros Inatos do Metabolismo
Sobre os centros SUS: Estes centros são habilitados pelo Ministério da Saúde como Serviços de Referência em Doenças Raras ou Serviços de Atenção Especializada. O atendimento é pelo SUS, com encaminhamento da rede de atenção básica.

Dados de DATASUS/CNES, SBGM, ABNeuro e Ministério da Saúde. Sempre confirme a disponibilidade diretamente com o estabelecimento.

Pesquisa ativa

Ensaios clínicos abertos e novidades científicas recentes

🟢 Recrutando agora

20 pesquisas recrutando participantes. Converse com seu médico sobre a possibilidade de participar.

NCT06628128 · A Study to Evaluate the Long-Term Safety and Efficacy of JNT…Recrutando
PHASE3
NCT07526909 · Effect of Different Meal Types Given Before Exercise on Plas…Recrutando
NA
NCT06971731 · A Study to Evaluate the Safety and Efficacy of JNT-517 in Pa…Recrutando
PHASE3
NCT06302348 · A Study of Sepiapterin in Participants With Phenylketonuria …Recrutando
PHASE3
NCT05813678 · A Long-term, Post-marketing Safety Study of Palynziq in Pati…Recrutando
NCT06305234 · A Long Term, Post-marketing Study of Immune Response in Pati…Recrutando
NCT05579548 · A Global, Multicenter Study to Assess Maternal, Fetal and In…Recrutando
NCT07220265 · Impact of Phenylalanine Elevations on Brain and Cognition in…Recrutando
NA
NCT06061614 · Safety and Efficacy Study of NGGT002 in PKU Adult SubjectsRecrutando
EARLY_PHASE1
NCT04404530 · Nutritional Impacts of Palynziq on Patients With Phenylketon…Recrutando
NCT06560736 · Development of Novel Psychological Assessment Tools and Anxi…Recrutando
NA
NCT06941532 · GMP Powdered Substitutes in PKU and TYRRecrutando
NA
NCT06332807 · AAV Gene Therapy Clinical Study in Adult Classic PKU (PHEdom…Recrutando
PHASE1, PHASE2
NCT06637514 · A Phase 2 Study of JNT-517 in Adolescent Participants With P…Recrutando
PHASE2
NCT06969209 · Brain Aging in PhenylketonuriaRecrutando
NCT05128149 · Metabolic Control and Patient Well-being in Phenylketonuria:…Recrutando
NCT06337864 · Effect of Large Neutral Amino Acids in Adults With Classical…Recrutando
NA
NCT01659749 · Educational, Social Support, and Nutritional Interventions a…Recrutando
NA
NCT06940193 · A Self-test Home-use Blood Phenylalanine Monitoring System U…Por convite
NCT03655223 · Early Check: Expanded Screening in NewbornsPor convite

Outros ensaios clínicos

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Publicações mais relevantes

🥈Melhor nível de evidência: Observacional
Timeline de publicações
1.904 papers (10 anos)

Mostrando amostra de 200 publicações de um total de 1.904

#1

Reply to Iqhrammullah, M. Comment on "Bokayeva et al. Vitamin Status in Patients with Phenylketonuria: A Systematic Review and Meta-Analysis. Int. J. Mol. Sci. 2024, 25, 5065".

International journal of molecular sciences2026 Feb 26

We thank the author for their comment [...].

#2

Comment on Bokayeva et al. Vitamin Status in Patients with Phenylketonuria: A Systematic Review and Meta-Analysis. Int. J. Mol. Sci. 2024, 25, 5065.

International journal of molecular sciences2026 Feb 26

I read with great interest the work by Bokayeva et al [...].

#3

Assessing the nutritional value and health risks of special low‑protein foods: narrative review.

Orphanet journal of rare diseases2026 Mar 06

Special low-protein foods (SLPFs) are essential for patients with disorders of inherited amino acid metabolism that require lifelong dietary protein restriction to prevent severe neurocognitive effects and even death. Conditions such as phenylketonuria (PKU), tyrosinemia (TYR), maple syrup urine disease (MSUD), homocystinuria (HCU), and urea cycle disorders (UCD) depend on these foods to support metabolic control and dietary adherence. SLPFs provide satiety, energy, and help prevent catabolism, but their nutritional composition poses challenges. Most SLPFs are formulated using isolated starches as the primary macronutrient base. Hydrocolloid fibers are commonly added to improve texture, consistency, shelf life, and water or gas retention. These ingredients form the backbone of SLPFs production and are consistently used across different regions worldwide, reflecting a standardized approach to their formulation. However, their potential adverse effects include suppression of gut microbiota, gut dysbiosis, increased inflammatory markers, overweight, and obesity, all of which raise cardio‑metabolic risks. Strengthening the nutritional quality of SLPFs through natural plant sources may help mitigate their potential adverse outcomes while ensuring patients’ dietary needs are met. Therefore, it is important to explore natural low‑protein alternatives that can both support sustainable food production and promote long‑term health benefits. PTS-related tetrahydrobiopterin deficiency (PTPSD) results in a lack of tetrahydropterin, an important cofactor for phenylalanine hydroxylase (PAH), tyrosine hydroxylase, and tryptophan hydroxylase. Deficiency can thus lead to neurotransmitter and neuropsychiatric disorders. The clinical spectrum of PTPSD is broad and differs according to age of onset, severity of disease, and whether preventative therapies were initiated and maintained from an early age. In the severe form, clinical symptoms may become apparent in the neonatal period and can include hypotonia, movement disorders, abnormal eye movements, autonomic dysregulation, and impaired development. Without treatment, developmental delays become more marked. Neurologic symptoms (dysarthria, dystonia, tremors, abnormal gait, parkinsonism, oculogyric crises, motor tics) may be ameliorated by treatment with sapropterin dihydrochloride and neurotransmitter precursors. Other features of the condition can include psychiatric comorbidities (ADHD, anxiety, depression), infant feeding difficulties leading to early growth failure, hyperprolactinemia, growth hormone deficiency, sleep issues, and autonomic dysfunction; many of these features can be ameliorated by appropriate treatment. In treated individuals, development often improves during adolescence, with many adults having a normal IQ level. In the mild (peripheral) form, affected individuals are usually asymptomatic apart from an increase in phenylalanine (Phe) levels. Some remain asymptomatic. However, with time, some have mild developmental delays and can develop deficiency of neurotransmitter production, such that treatment of some asymptomatic individuals may be required. The biochemical diagnosis of PTPSD is established in a proband with confirmed hyperphenylalaninemia, elevated neopterin levels, reduced biopterin levels, and a decreased biopterin-to-neopterin ratio in urine or dried blood spots (DBS) and normal dihydropteridine reductase (DHPR) activity in DBS. The molecular diagnosis of PTPSD is established in a proband by identification of biallelic pathogenic (or likely pathogenic) variants in PTS by molecular genetic testing. Targeted therapies: Immediate therapy with sapropterin (tetrahydrobiopterin dihydrochloride; BH4), a cofactor/cosubstrate of PAH, is recommended to reduce blood Phe concentrations in individuals with hyperphenylalaninemia. If sapropterin is not available, dietary Phe restriction should be implemented. Because sapropterin has limited access to the central nervous system (CNS), or rather, this access is only achieved at high doses, therapy with sapropterin does not normalize the activity of tyrosine or tryptophan hydroxylase in people with PTPSD. Additional treatment strategies are necessary for long-term management and may include the use of neurotransmitter precursors (levodopa plus decarboxylase inhibitor (DCI), i.e., carbidopa or benserazide), 5-hydroxytryptophan, and/or dopamine (rotigotine patch, pramipexole) and/or serotonin agonists, or other medications (MAO inhibitors such as selegiline) to address specific neurotransmitter deficiencies and maintain optimal neurologic function. Supportive care: Optimization of dosage and intervals of levodopa/DCI in those with abnormal movements/parkinsonism; growth hormone supplementation and/or optimization of neurotransmitter precursor therapy for growth hormone deficiency; optimization of neurotransmitter precursor therapy for recurrent hyperthermia; anticholinergic treatment may be considered for hypersalivation; standard treatment for developmental delay, spasticity, epilepsy, sleep disorders, and decreased bone mineral density. Biochemical surveillance: Routine Phe monitoring in infants (age <1 year) weekly until normalized and then every three to six months once levels normalize; every six months in children younger than age 12 years; and every six to 12 months in adolescents and adults; the Phe target ranges correspond to those of PAH deficiency. Prolactin level at each visit. Routine clinical visits with a metabolic specialist (and metabolic dietician if on Phe-restricted diet) every one to three months in infants (age <1 year), every three to six months between ages one and seven years, and every six to 12 months in those age eight years and older. General surveillance: At each visit, measure growth parameters and evaluate nutritional status; asses for new neurologic manifestations (changes in tone, seizures, movement disorders); monitor developmental progress and assess educational needs; monitor for behavioral issues (anxiety, ADHD, emotional dysregulation, depression, aggression); and assess for signs and symptoms of sleep disorders. At ages two, six, 12, and 18 years, consider neuropsychological evaluation. In adulthood, periodic parathormone levels and DXA scan. As needed, consider EEG to differentiate from movement disorder seizures. Agents/circumstances to avoid: Persons with PTPSD on Phe-reduced diet should either avoid products containing aspartame or calculate total intake of Phe when using such products and adapt diet components accordingly. Evaluation of relatives at risk: If prenatal genetic testing has not been performed, each at-risk newborn sib should be evaluated immediately (at or just after 24 hours) after birth for PTPSD using measurement of blood Phe concentration to allow for earliest possible diagnosis and treatment. If older sibs have not undergone NBS or genetic testing for the known familial pathogenic variants in PTS, measure blood Phe concentrations to clarify their disease status. Pregnancy management: Women with PTPSD who have received appropriate treatment throughout childhood and adolescence and during pregnancy may have offspring with normal intellectual and behavioral development, particularly if levels of Phe are kept in the normal range during pregnancy. Intensive clinical and biochemical supervision by a multidisciplinary team before, during, and after pregnancy in a woman with PTPSD is essential to control the symptoms of the disease, adjust the treatment if needed, and monitor the development of the fetus. If the affected woman has elevated blood Phe concentrations during pregnancy, the fetus is at high risk for maternal phenylketonuria (MPKU) syndrome (reported specifically in women who have PAH deficiency as the primary cause of their elevated Phe levels), including malformations and intellectual disability, since Phe is a potent teratogen. PTPSD is inherited in an autosomal recessive manner. If both parents are known to be heterozygous for a PTS pathogenic variant, each sib of an affected individual has at conception a 25% chance of being affected, a 50% chance of being an asymptomatic carrier, and a 25% chance of inheriting neither of the familial PTS pathogenic variants. Children born of one parent with PTPSD and one parent with two normal PTS alleles are obligate heterozygotes. If the mother is the affected parent, MPKU syndrome is a critical issue. Females with PTPSD should receive counseling regarding the teratogenic effects of elevated maternal plasma Phe concentration (i.e., MPKU syndrome) when they reach childbearing age. Once the PTS pathogenic variants have been identified in an affected family member, carrier testing for at-risk relatives and prenatal/preimplantation genetic testing for PTPSD are possible.

#4

The prevalence of phenylketonuria (PKU) and hyperphenylalaninemia (HPA) in Iran: a systematic review and meta-analysis.

Orphanet journal of rare diseases2026 Feb 25

Phenylketonuria (PKU) is one of the common Inborn Errors of Metabolism diseases, that is caused by a phenylalanine hydroxylase (PAH) deficiency or cofactor tetrahydrobiopterin. This systematic review and meta-analysis aimed to investigate the prevalence of PKU in Iran. The protocol was registered in PROSPERO (CRD42024540811). The MOOSE protocol and the PRISMA guidelines were used. The Web of Sciences, PubMed/ Medline, Sciences Direct, Google Scholar, Scopus, Civilica, IranDoc, and SID databases were searched on 31/03/2024. The I2 index and Q test were used to check heterogeneity. Comprehensive meta-analysis software (CMA ver. 2) was used (P < 0.05 is considered significant). The prevalences were reported in 100,000 neonates at national and provincial levels. Finally, 20 studies with 1,992,090 Iranian neonates were included. The prevalence of screen-positive cases was 75.6 (95% CI: 48.1-118.72). The prevalence of confirmed PKU was 16.7 (95% CI: 13.6- 20.5); this prevalence in girls and boys was 15.2 (95% CI: 5.2-44.2) and 9.8 (95% CI: 3.2- 29.8), respectively. 53% of the cases had Hyperphenylalaninemia (HPA). The prevalence of HPA and classical PKU was estimated at 8.9 (95% CI: 5.9-13.41) and 8.0 (95% CI: 5.1-12.59), respectively. Subgroup analysis was performed based on region, province, and study quality to discover the source of heterogeneity. In addition, mixed effects meta-regression was used to find the relationship between continuous variables. Sensitivity analysis showed that the pooled estimate was robust. It seems that the screening program in Iran was effective and detected almost all PKU cases in the first few days of their lives. This information showed that the PKU prevalence is relatively higher than in most parts of the world, thus their prevalence should be controlled.

#5

Brain Age in Adult Patients With Early-Treated Phenylketonuria.

Journal of inherited metabolic disease2026 Mar

Structural brain alterations have been observed in individuals with phenylketonuria (PKU); however, the potential impact of PKU on brain aging remains unexplored. This study investigated brain age in adults with early-treated classical PKU compared to healthy controls. Thirty early-treated adults with classical PKU (age 19-48 years) and 59 age-, sex-, and education-comparable healthy controls underwent structural magnetic resonance imaging (MRI), cognitive and mood assessment, and blood sampling. Brain age was estimated using machine learning models trained to predict brain age from MRI-derived features across the full brain, cortical lobes, or subcortical regions. The brain age gap (BAG)-the difference between brain age and chronological age-was calculated. In addition, white matter lesion load was rated in patients. While patients with PKU showed differences in BAG for four out of eight brain age estimates, only the BAG in the insula was significantly higher in PKU than controls after correcting for multiple comparisons (puncor = 0.006, η2 = 0.07). The cingulate BAG was positively associated with concurrent and historical Phe levels (rs = 0.41-0.69, puncor < 0.05) and with white matter lesion load (rs = 0.40, puncor = 0.034). Further, subcortical and cingulate BAG were linked to cognitive performance (rs = -0.41-0.38, puncor < 0.05). These correlations did not survive FDR-correction. In conclusion, the elevated insular BAG in adults with early-treated PKU may reflect atypical brain development due to cumulative effects of early-life or lifelong metabolic disturbances. Longitudinal studies are warranted to elucidate brain aging trajectories and their cognitive implications in PKU.

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GluN2B suppression restores phenylalanine-induced neuroplasticity and cognition impairments in a mouse model of phenylketonuria.

The Journal of clinical investigation
2025

An Oxford Nanopore Technologies-Based Sequencing Assay for Molecular Diagnosis of Phenylketonuria and Variant Frequencies in a Turkish Cohort.

International journal of genomics
2025

Agreement between the Amsterdam Neuropsychological Tasks and the Cambridge Neuropsychological Test Automated Battery in the assessment of PKU patients and healthy controls.

Molecular genetics and metabolism
2025

Frailty indices based on routinely collected data: a scoping review.

The Journal of frailty &amp; aging
2025

Evaluating adverse events of pegvaliase-pqpz in phenylketonuria treatment: A comprehensive safety assessment.

SAGE open medicine
Ver todos os 4.662 no EuropePMC

Associações

Organizações que acompanham esta doença — pra ter apoio e orientação

IJCVerificada

Pioneiro da triagem neonatal na América Latina (1976). 17 milhões de bebês triados.

Comunidades

Grupos ativos de quem convive com esta doença aqui no Raras

Ainda não existe comunidade no Raras para Fenilcetonúria

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Doenças relacionadas

Doenças com sintomas parecidos — ajudam quem ainda está buscando diagnóstico

Ordenadas pelo número de sintomas em comum.

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.

  1. Reply to Iqhrammullah, M. Comment on "Bokayeva et al. Vitamin Status in Patients with Phenylketonuria: A Systematic Review and Meta-Analysis. Int. J. Mol. Sci. 2024, 25, 5065".
    International journal of molecular sciences· 2026· PMID 41828404mais citado
  2. Comment on Bokayeva et al. Vitamin Status in Patients with Phenylketonuria: A Systematic Review and Meta-Analysis. Int. J. Mol. Sci. 2024, 25, 5065.
    International journal of molecular sciences· 2026· PMID 41828403mais citado
  3. Assessing the nutritional value and health risks of special low&#x2011;protein foods: narrative review.
    Orphanet journal of rare diseases· 2026· PMID 41792796mais citado
  4. The prevalence of phenylketonuria (PKU) and hyperphenylalaninemia (HPA) in Iran: a systematic review and meta-analysis.
    Orphanet journal of rare diseases· 2026· PMID 41742279mais citado
  5. Brain Age in Adult Patients With Early-Treated Phenylketonuria.
    Journal of inherited metabolic disease· 2026· PMID 41703402mais citado
  6. Improved dietary control results in improvements in indices of white matter structure in adults with phenylketonuria: the ReDAPT study.
    Acta Neuropsychiatr· 2026· PMID 41992913recente
  7. Real-Life Application of a Point-of-Care Biosensor for Phenylalanine in Patients With Phenylketonuria.
    J Inherit Metab Dis· 2026· PMID 41989430recente
  8. Variant-dependent pharmacological rescue of phenylalanine hydroxylase supports a precision therapeutic strategy for phenylketonuria.
    Biomed Pharmacother· 2026· PMID 41990466recente
  9. Tandem Mass Spectrometry Fingerprint Tags (TMSFT) Applied for Early Gestation Noninvasive Prenatal Detection of Single-Gene Disorders.
    Anal Chem· 2026· PMID 41973470recente
  10. Long-Term Safety and Efficacy of Pegvaliase in Japanese Adults With Phenylketonuria: Final Results of a Phase III Trial.
    JIMD Rep· 2026· PMID 41971647recente

Bases de dados e fontes oficiais

Identificadores e referências canônicas usadas para montar este verbete.

  1. ORPHA:716(Orphanet)
  2. OMIM OMIM:261600(OMIM)
  3. MONDO:0009861(MONDO)
  4. Fenilcetonuria(PCDT · Ministério da Saúde)
  5. GARD:7383(GARD (NIH))
  6. Variantes catalogadas(ClinVar)
  7. Busca completa no PubMed(PubMed)
  8. Artigo Wikipedia(Wikipedia)
  9. Q194041(Wikidata)

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.

Conteúdo mantido por Agente Raras · Médicos e pesquisadores podem colaborar

Fenilcetonúria
Compêndio · Raras BR

Fenilcetonúria

ORPHA:716 · MONDO:0009861
🇧🇷 Brasil SUS
Triagem
Fenilalanina em sangue seco (Teste do Pezinho)
PNTN
Fase 1 · Nacional
Incidência BR
1:15.000
CEAF
1ADicloridrato de sapropterinaPegvaliase
Internações
245/ano
Prevalência BR
1:15000
Custo SUS
R$ 1.520/internação
Dados
DATASUS 2024
Geral
Prevalência
1-9 / 100 000
Herança
Autosomal recessive
CID-10
E70.0 · Fenilcetonúria clássica
CID-11
Ensaios
32 ativos
Medicamentos
2 registrados
Início
Infancy
Prevalência
10.99 (France)
MedGen
UMLS
C0031485
EuropePMC
Wikidata
Wikipedia
Papers 10a
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