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1.
Biol Psychiatry ; 96(2): 147-158, 2024 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-38752911

RESUMO

BACKGROUND: A role for prenatal steroid hormones in the etiology of autism has been proposed, but evidence is conflicting. METHODS: Here, we examined serum levels of maternal estradiol, testosterone, 17-hydroxyprogesterone (OHP), and cortisol from the first trimester of gestation (mean = 10.1 weeks) in relation to the odds of diagnosed autism with and without co-occurring intellectual disability (ID) in the offspring (n = 118 autism with ID, n = 249 autism without ID, n = 477 control). Levels of maternal hormones were measured using highly sensitive liquid chromatography tandem mass spectrometry, standardized according to gestational timing of sample collection, and analyzed with restricted cubic spline logistic regression models adjusting for child's sex and maternal health, demographic, and socioeconomic factors. RESULTS: We observed significant nonlinear associations between maternal estradiol, 17-OHP, and cortisol with autism, which varied with the presence of co-occurring ID. Compared to mean levels, lower levels of estradiol were associated with higher odds of autism with ID (odds ratio for concentrations 1 SD below the mean = 1.66; 95% CI, 1.24-2.11), while higher cortisol levels were associated with lower odds (odds ratio for 1 SD above the mean = 0.55; 95% CI, 0.36-0.88). In contrast, higher 17-OHP was associated with increased odds of autism without ID (odds ratio for 1 SD above the mean = 1.49; 95% CI, 1.11-1.99). We observed no evidence for interaction with sex of the child. CONCLUSIONS: These findings support the notion that the maternal steroid hormonal environment in early pregnancy may contribute to autism, but also emphasize the complex relationship between early-life steroid exposure and autism.


Assuntos
Transtorno Autístico , Estradiol , Hidrocortisona , Efeitos Tardios da Exposição Pré-Natal , Humanos , Feminino , Gravidez , Estudos de Casos e Controles , Masculino , Transtorno Autístico/sangue , Transtorno Autístico/epidemiologia , Efeitos Tardios da Exposição Pré-Natal/sangue , Efeitos Tardios da Exposição Pré-Natal/epidemiologia , Hidrocortisona/sangue , Adulto , Estradiol/sangue , Primeiro Trimestre da Gravidez/sangue , Testosterona/sangue , 17-alfa-Hidroxiprogesterona/sangue , Deficiência Intelectual/sangue , Deficiência Intelectual/epidemiologia , Criança , Pré-Escolar
2.
Hum Mol Genet ; 32(9): 1429-1438, 2023 04 20.
Artigo em Inglês | MEDLINE | ID: mdl-36440975

RESUMO

Pathogenic variants in ANKRD11 or microdeletions at 16q24.3 are the cause of KBG syndrome (KBGS), a neurodevelopmental syndrome characterized by intellectual disability, dental and skeletal anomalies, and characteristic facies. The ANKRD11 gene encodes the ankyrin repeat-containing protein 11A transcriptional regulator, which is expressed in the brain and implicated in neural development. Syndromic conditions caused by pathogenic variants in epigenetic regulatory genes show unique patterns of DNA methylation (DNAm) in peripheral blood, termed DNAm signatures. Given ANKRD11's role in chromatin modification, we tested whether pathogenic ANKRD11 variants underlying KBGS are associated with a DNAm signature. We profiled whole-blood DNAm in 21 individuals with ANKRD11 variants, 2 individuals with microdeletions at 16q24.3 and 28 typically developing individuals, using Illumina's Infinium EPIC array. We identified 95 differentially methylated CpG sites that distinguished individuals with KBGS and pathogenic variants in ANKRD11 (n = 14) from typically developing controls (n = 28). This DNAm signature was then validated in an independent cohort of seven individuals with KBGS and pathogenic ANKRD11 variants. We generated a machine learning model from the KBGS DNAm signature and classified the DNAm profiles of four individuals with variants of uncertain significance (VUS) in ANKRD11. We identified an intermediate classification score for an inherited missense variant transmitted from a clinically unaffected mother to her affected child. In conclusion, we show that the DNAm profiles of two individuals with 16q24.3 microdeletions were indistinguishable from the DNAm profiles of individuals with pathogenic variants in ANKRD11, and we demonstrate the diagnostic utility of the new KBGS signature by classifying the DNAm profiles of individuals with VUS in ANKRD11.


Assuntos
Anormalidades Múltiplas , Proteínas Repressoras , Criança , Feminino , Humanos , Anormalidades Múltiplas/sangue , Anormalidades Múltiplas/diagnóstico , Anormalidades Múltiplas/genética , Doenças do Desenvolvimento Ósseo/sangue , Doenças do Desenvolvimento Ósseo/diagnóstico , Doenças do Desenvolvimento Ósseo/genética , Deleção Cromossômica , Metilação de DNA/genética , Epigênese Genética/genética , Fácies , Deficiência Intelectual/sangue , Deficiência Intelectual/diagnóstico , Deficiência Intelectual/genética , Aprendizado de Máquina , Mutação , Fenótipo , Proteínas Repressoras/genética , Anormalidades Dentárias/sangue , Anormalidades Dentárias/diagnóstico , Anormalidades Dentárias/genética , Fatores de Transcrição/genética
3.
Eur J Paediatr Neurol ; 28: 81-88, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32811771

RESUMO

BACKGROUND: Neurodegeneration with brain iron accumulation constitutes a group of rare progressive movement disorders sharing intellectual disability and neuroimaging findings as common denominators. Beta-propeller protein-associated neurodegeneration (BPAN) represents approximately 7% of the cases, and its first signs are typically epilepsy and developmental delay. We aimed to describe in detail the phenotype of BPAN with a special focus on iron metabolism. MATERIAL AND METHODS: We present a cohort of paediatric patients with pathogenic variants of WD-Repeat Domain 45 gene (WDR45). The diagnosis was established by targeted panel sequencing of genes associated with epileptic encephalopathies (n = 9) or by Sanger sequencing of WDR45 (n = 1). Data on clinical characteristics, molecular-genetic findings and other performed investigations were gathered from all participating centres. Markers of iron metabolism were analysed in 6 patients. RESULTS: Ten children (3 males, 7 females, median age 8.4 years) from five centres (Prague, Berlin, Vogtareuth, Tubingen and Cologne) were enrolled in the study. All patients manifested first symptoms (e.g. epilepsy, developmental delay) between 2 and 31 months (median 16 months). Seven patients were seizure-free (6 on antiepileptic medication, one drug-free) at the time of data collection. Neurological findings were non-specific with deep tendon hyperreflexia (n = 4) and orofacial dystonia (n = 3) being the most common. Soluble transferrin receptor/log ferritin ratio was elevated in 5/6 examined subjects; other parameters of iron metabolism were normal. CONCLUSION: Severity of epilepsy often gradually decreases in BPAN patients. Elevation of soluble transferrin receptor/log ferritin ratio could be another biochemical marker of the disease and should be explored by further studies.


Assuntos
Proteínas de Transporte/genética , Distúrbios do Metabolismo do Ferro/genética , Distúrbios do Metabolismo do Ferro/metabolismo , Ferro/sangue , Doenças Neurodegenerativas/genética , Doenças Neurodegenerativas/metabolismo , Biomarcadores/sangue , Criança , Epilepsia/sangue , Epilepsia/genética , Epilepsia/metabolismo , Feminino , Humanos , Deficiência Intelectual/sangue , Deficiência Intelectual/genética , Deficiência Intelectual/metabolismo , Distúrbios do Metabolismo do Ferro/sangue , Masculino , Transtornos dos Movimentos/sangue , Transtornos dos Movimentos/genética , Transtornos dos Movimentos/metabolismo , Doenças Neurodegenerativas/sangue , Fenótipo
4.
J Assist Reprod Genet ; 37(8): 1931-1938, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32519010

RESUMO

PURPOSE: Higher serum estradiol levels occur in women undergoing assisted reproductive technology (ART) owing to ovarian stimulation. Here, we investigated the association between maternal serum estradiol levels and the intellectual development of offspring conceived with ART. METHODS: A total of 204 singletons born after fresh embryo transfer were recruited for this cohort study. Among them, 102 children were born from mothers with high serum estradiol levels (> 12,000 pmol/L) on the day that human chorionic gonadotropin was administered. Another 102 children, matched by gestational age and age of the children, were recruited as controls from mothers with low serum estradiol (≤ 12,000 pmol/L). The Wechsler Preschool and Primary Scale of Intelligence was used to evaluate the intellectual development of the children. RESULTS: Children from mothers with higher serum estradiol levels scored lower in the verbal intelligence quotient (IQ) tests and verbal comprehension than children whose mothers had lower estradiol levels. The main difference between the two groups was in verbal subtests including information, vocabulary, and sorting. Partial correlation analysis revealed that the logarithm of maternal serum estradiol level negatively correlated with verbal IQ, performance IQ, and full scale IQ. CONCLUSION: Our data demonstrate that a high maternal serum estradiol level may negatively associate the verbal ability of children conceived via ART.


Assuntos
Estradiol/sangue , Deficiência Intelectual/sangue , Inteligência/fisiologia , Técnicas de Reprodução Assistida/efeitos adversos , Adulto , Criança , Pré-Escolar , Gonadotropina Coriônica/administração & dosagem , Estudos de Coortes , Transferência Embrionária/efeitos adversos , Feminino , Fertilização in vitro/efeitos adversos , Humanos , Deficiência Intelectual/etiologia , Deficiência Intelectual/fisiopatologia , Testes de Inteligência , Masculino , Injeções de Esperma Intracitoplásmicas/efeitos adversos
5.
Am J Perinatol ; 36(1): 3-7, 2019 01.
Artigo em Inglês | MEDLINE | ID: mdl-29433145

RESUMO

OBJECTIVE: We examined the effects of magnesium sulfate on non-neurologic neonatal outcomes with respect to cord blood magnesium level. STUDY DESIGN: We conducted a secondary analysis of the Maternal-Fetal Medicine Units Beneficial Effects of Antenatal Magnesium (MFMU BEAM) trial comparing the upper and lower quintiles of cord blood magnesium level. Outcomes included cerebral palsy (CP), necrotizing enterocolitis (NEC), retinopathy of prematurity (ROP), bronchopulmonary dysplasia (BPD), and assessments of mental and motor disability. Logistic regression was used to estimate adjusted odds ratios (aORs) of each outcome, controlling for gestational age (GA), birth weight, and treatment group (TG). RESULTS: A total of 1,254 women of the 2,444 included in the BEAM trial had cord blood magnesium levels recorded. GA and birth weight were lower and TG was more common in the upper quintile cohort (p < 0.001). Neonates in the upper quintile were more likely to have severe NEC (OR, 2.41, 95% confidence interval [CI]: 1.11-5.24), ROP (OR, 1.65, 95% CI: 1.05-2.59), and BPD (OR, 1.70, 95% CI: 1.04-2.73). Adjustment for covariates demonstrated no difference in the NEC, ROP, and BPD rates, although there was a decrease in rates of mental disability index < 70 which was not seen in the unadjusted analysis (aOR, 0.49, 95% CI: 0.25-0.99). CONCLUSION: Higher cord blood magnesium levels do not appear to have adverse non-neurologic effects on the neonate and may demonstrate improvement in neurologic outcomes.


Assuntos
Displasia Broncopulmonar , Paralisia Cerebral , Enterocolite Necrosante , Sangue Fetal , Sulfato de Magnésio , Magnésio/sangue , Retinopatia da Prematuridade , Adulto , Anticonvulsivantes/administração & dosagem , Anticonvulsivantes/efeitos adversos , Displasia Broncopulmonar/sangue , Displasia Broncopulmonar/epidemiologia , Paralisia Cerebral/epidemiologia , Paralisia Cerebral/prevenção & controle , Enterocolite Necrosante/sangue , Enterocolite Necrosante/epidemiologia , Feminino , Humanos , Recém-Nascido , Deficiência Intelectual/sangue , Deficiência Intelectual/epidemiologia , Sulfato de Magnésio/administração & dosagem , Sulfato de Magnésio/efeitos adversos , Masculino , Avaliação de Resultados em Cuidados de Saúde , Gravidez , Nascimento Prematuro/prevenção & controle , Retinopatia da Prematuridade/sangue , Retinopatia da Prematuridade/epidemiologia
6.
J Clin Endocrinol Metab ; 103(10): 3729-3736, 2018 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-30020468

RESUMO

Context: Thyroperoxidase antibody (TPOAb) positivity is a major risk factor for gestational thyroid dysfunction. During the first 18 to 20 weeks of pregnancy, high concentrations of human chorionic gonadotropin (hCG) stimulate the thyroid to ensure adequate thyroid hormone availability for the developing fetus. However, TPOAb-positive women have an impaired thyroidal response to hCG stimulation. Objective: To study the association of maternal TPOAb positivity during pregnancy with child IQ. Design, Setting, and Participants: This study was embedded in two prospective birth cohorts: Generation R (Rotterdam, the Netherlands) and Avon Longitudinal Study of Parents and Children (ALSPAC; United Kingdom). Mother-child pairs with available data on early pregnancy TPOAb (≤18 weeks of gestation) and offspring IQ were included (n = 3637 for Generation R and n = 2396 for ALSPAC). Main Outcome Measures: Child IQ at 5 to 10 years of age. Results: In Generation R, TPOAb positivity was associated with a 2.0 ± 0.9-point lower mean child IQ (P = 0.03). Sensitivity analyses showed negative effect estimates already from TPOAb concentrations considerably lower than currently used manufacturer cutoffs. In ALSPAC, neither TPOAb positivity nor TPOAb concentrations below manufacturer cutoffs were associated with child IQ (TPOAb positivity: 0.7 ± 1.0; P = 0.45). Adjustment for maternal TSH or free T4 concentrations or urinary iodine/creatinine ratio did not change the results. Conclusion: TPOAb positivity during pregnancy was associated with lower child IQ in Generation R but not in ALSPAC. Further studies are needed to elucidate whether differences between the study populations, such as maternal iodine status, could be the underlying cause for these differences.


Assuntos
Autoantígenos/imunologia , Desenvolvimento Infantil , Deficiência Intelectual/etiologia , Iodeto Peroxidase/imunologia , Proteínas de Ligação ao Ferro/imunologia , Complicações na Gravidez/etiologia , Efeitos Tardios da Exposição Pré-Natal/etiologia , Hormônios Tireóideos/sangue , Tireoidite Autoimune/complicações , Adulto , Biomarcadores/análise , Feminino , Seguimentos , Idade Gestacional , Humanos , Recém-Nascido , Deficiência Intelectual/sangue , Estudos Longitudinais , Masculino , Gravidez , Complicações na Gravidez/sangue , Efeitos Tardios da Exposição Pré-Natal/patologia , Prognóstico , Estudos Prospectivos
7.
Ann Thorac Surg ; 106(3): 792-798, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29733822

RESUMO

BACKGROUND: Neurocognitive deficits at school starting age may affect as many as 50% of children who underwent cardiac surgery for complex congenital heart disease (CHD). The aim of this study was to identify which phases of cardiopulmonary bypass (CPB) are associated with an increased risk of impaired neurodevelopmental skills in children with complex CHD. This was assessed by means of glial fibrillary acidic protein (GFAP) plasma levels during CPB for CHD surgery, as a marker of neurologic insult. We correlated GFAP levels with clinical parameters and neurodevelopmental outcome. METHODS: We studied 45 children undergoing surgery for complex CHD. We measured plasma GFAP levels by enzyme-linked immunosorbent assay at the following steps: anesthesia induction, CPB start, end of hypothermia, end of rewarming, and end of CPB. Neurologic assessment and Vineland Adaptive Behavior Scales (VABS-I) were administered to patients at least 18 months after surgery. RESULTS: GFAP was undetectable before surgery and it peaked at the end of hypothermia or rewarming. Multiple regression analyses showed that GFAP peak level and preoperative neurologic comorbidity were significant independent predictors of neurologic impairment, as showed by VABS-I communication domain intelligence quotient (IQ). Receiver operating characteristic curve showed that the model was highly significant. CONCLUSIONS: Impaired neurodevelopment was associated with increase of GFAP plasma levels during cardiac surgery in infants. The identification of the neurologic high-risk phases of CPB run could support the application of new neuroprotective strategies for CHD repair.


Assuntos
Ponte Cardiopulmonar/métodos , Transtornos Cognitivos/epidemiologia , Proteína Glial Fibrilar Ácida/sangue , Cardiopatias Congênitas/cirurgia , Deficiência Intelectual/epidemiologia , Centros Médicos Acadêmicos , Biomarcadores/sangue , Ponte Cardiopulmonar/efeitos adversos , Criança , Transtornos Cognitivos/etiologia , Transtornos Cognitivos/fisiopatologia , Estudos de Coortes , Feminino , Seguimentos , Cardiopatias Congênitas/diagnóstico por imagem , Humanos , Hipotermia Induzida/métodos , Incidência , Lactente , Recém-Nascido , Deficiência Intelectual/sangue , Deficiência Intelectual/etiologia , Itália , Masculino , Análise Multivariada , Exame Neurológico/métodos , Estudos Prospectivos , Curva ROC , Análise de Regressão , Medição de Risco
8.
Neurogenetics ; 19(3): 157-163, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29846820

RESUMO

Dandy-Walker malformation (DWM) has been reported to have heterogeneous causes, including mutations in genes of fibroblast growth factors and in genes in the sonic hedgehog (Shh) signaling pathway. Here, we identified an activating cancerous inhibitor of protein phosphatase 2A (CIP2A) p.D269V mutation, located at the predicted protein-protein interaction groove, as a novel genetic cause of Dandy-Walker variant (DWV). CIP2A has been reported as an oncoprotein promoting tumor survival via inhibition of protein phosphatase 2A (PP2A). However, the impact of human germline CIP2A mutation is unknown. We report a novel heterozygous CIP2A p.D269V mutation via whole exome sequencing in two siblings with DWV and severe intellectual disability who were born to non-consanguineous parents. Only the older brother developed a slow-growing sacral leiomyoma in his teens. The CIP2A p.D269V mutation is associated with increased PP2A, mTOR, and c-Myc protein levels in peripheral blood mononuclear cells (PBMCs). The PP2A phosphatase activity, however, was not suppressed. Deep sequencing revealed that the father carries 16% of somatic CIP2A p.D269V mutation, suggesting potential inheritance from the mosaic sperm populations. Our study is the first to describe a pathogenic CIP2A mutation in humans, which might disrupt neuronal development via enhancing mTOR and c-Myc protein expressions, shedding light in mechanisms of DWV pathogenesis.


Assuntos
Autoantígenos/genética , Síndrome de Dandy-Walker/genética , Deficiência Intelectual/genética , Proteínas de Membrana/genética , Mutação de Sentido Incorreto , Adolescente , Substituição de Aminoácidos , Síndrome de Dandy-Walker/sangue , Síndrome de Dandy-Walker/complicações , Feminino , Humanos , Deficiência Intelectual/sangue , Deficiência Intelectual/complicações , Peptídeos e Proteínas de Sinalização Intracelular , Leucócitos Mononucleares/metabolismo , Masculino , Linhagem , Proteínas Proto-Oncogênicas c-myc/sangue , Proteínas Proto-Oncogênicas c-myc/metabolismo , Irmãos , Serina-Treonina Quinases TOR/sangue , Serina-Treonina Quinases TOR/metabolismo , Sequenciamento do Exoma , Adulto Jovem
9.
Epilepsia ; 58(6): e91-e95, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28471529

RESUMO

Patients affected by protocadherin 19 (PCDH19)-female limited epilepsy (PCDH19-FE) present a remarkable reduction in allopregnanolone blood levels. However, no information is available on other neuroactive steroids and the steroidogenic response to hormonal stimulation. For this reason, we evaluated allopregnanolone, pregnanolone, and pregnenolone sulfate by liquid chromatographic procedures coupled with electrospray tandem mass spectrometry in 12 unrelated patients and 15 age-matched controls. We also tested cortisol, estradiol, progesterone, and 17OH-progesterone using standard immunoassays. Apart from estradiol and progesterone, all the considered hormones were evaluated in basal condition and after stimulation with adrenocorticotropic hormone (ACTH). A generalized decrease in blood levels of almost all measured neuroactive steroids was found. When considering sexual development, cortisol and pregnenolone sulfate basal levels were significantly reduced in postpubertal girls affected by PCDH19-FE. Of interest, ACTH administration did not recover pregnenolone sulfate serum levels but restored cortisol to control levels. In prepubertal girls with PCDH19-FE, by challenging adrenal function with ACTH we disclosed defects in the production of cortisol, pregnenolone sulfate, and 17OH-progesterone, which were not apparent in basal condition. These findings point to multiple defects in peripheral steroidogenesis associated with and potentially relevant to PCDH19-FE. Some of these defects could be addressed by stimulating adrenocortical activity.


Assuntos
Caderinas/genética , Epilepsia/sangue , Epilepsia/genética , Doenças Genéticas Ligadas ao Cromossomo X/sangue , Doenças Genéticas Ligadas ao Cromossomo X/genética , Hormônios Esteroides Gonadais/sangue , Deficiência Intelectual/sangue , Deficiência Intelectual/genética , Pregnanolona/sangue , Pregnanolona/deficiência , Pregnenolona/sangue , 17-alfa-Hidroxiprogesterona/sangue , Adolescente , Hormônio Adrenocorticotrópico/farmacologia , Síndrome Adrenogenital/sangue , Estudos de Casos e Controles , Criança , Pré-Escolar , Análise Mutacional de DNA , Estradiol/sangue , Feminino , Humanos , Hidrocortisona/sangue , Progesterona/sangue , Estudos Prospectivos , Protocaderinas , Puberdade Precoce/sangue , Puberdade Precoce/genética , Valores de Referência
10.
J Bone Miner Res ; 32(2): 333-346, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27589370

RESUMO

In humans, activating mutations in the PRKAR1A gene cause acrodysostosis 1 (ACRDYS1). These mutations result in a reduction in PKA activation caused by an impaired ability of cAMP to dissociate mutant PRKAR1A from catalytic PKA subunits. Two striking features of this rare developmental disease are renal resistance to PTH and chondrodysplasia resulting from the constitutive inhibition of PTHR1/Gsa/AC/cAMP/PKA signaling. We developed a knock-in of the recurrent ACRDYS1 R368X PRKAR1A mutation in the mouse. No litters were obtained from [R368X]/[+] females (thus no homozygous [R368X]/[R368X] mice). In [R368X]/[+] mice, Western blot analysis confirmed mutant allele heterozygous expression. Growth retardation, peripheral acrodysostosis (including brachydactyly affecting all digits), and facial dysostosis were shown in [R368X]/[+] mice by weight curves and skeletal measurements (µCT scan) as a function of time. [R368X]/[+] male and female mice were similarly affected. Unexpected, however, whole-mount skeletal preparations revealed a striking delay in mineralization in newborn mutant mice, accompanied by a decrease in the height of terminal hypertrophic chondrocyte layer, an increase in the height of columnar proliferative prehypertrophic chondrocyte layer, and changes in the number and spatial arrangement of proliferating cell nuclear antigen (PCNA)-positive chondrocytes. Plasma PTH and basal urinary cAMP were significantly higher in [R368X]/[+] compared to WT mice. PTH injection increased urinary cAMP similarly in [R368X]/[+] and WT mice. PRKACA expression was regulated in a tissue (kidney not bone and liver) manner. This model, the first describing the germline expression of a PRKAR1A mutation causing dominant repression of cAMP-dependent PKA, reproduced the main features of ACRDYS1 in humans. It should help decipher the specificity of the cAMP/PKA signaling pathway, crucial for numerous stimuli. In addition, our results indicate that PRKAR1A, by tempering intracellular cAMP levels, is a molecular switch at the crossroads of signaling pathways regulating chondrocyte proliferation and differentiation. © 2016 American Society for Bone and Mineral Research.


Assuntos
Subunidade RIalfa da Proteína Quinase Dependente de AMP Cíclico/genética , Disostoses/enzimologia , Disostoses/genética , Técnicas de Introdução de Genes , Deficiência Intelectual/enzimologia , Deficiência Intelectual/genética , Modelos Biológicos , Mutação/genética , Osteocondrodisplasias/enzimologia , Osteocondrodisplasias/genética , Animais , Animais Recém-Nascidos , Osso e Ossos/anormalidades , Osso e Ossos/patologia , Disostoses/sangue , Disostoses/diagnóstico por imagem , Ativação Enzimática , Feminino , Técnicas de Genotipagem , Integrases/metabolismo , Deficiência Intelectual/sangue , Deficiência Intelectual/diagnóstico por imagem , Masculino , Camundongos Endogâmicos C57BL , Camundongos Mutantes , Especificidade de Órgãos , Osteocondrodisplasias/sangue , Osteocondrodisplasias/diagnóstico por imagem , Fenótipo , Microtomografia por Raio-X
11.
Eur J Endocrinol ; 175(6): P1-P17, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27401862

RESUMO

OBJECTIVE: Disorders caused by impairments in the parathyroid hormone (PTH) signalling pathway are historically classified under the term pseudohypoparathyroidism (PHP), which encompasses rare, related and highly heterogeneous diseases with demonstrated (epi)genetic causes. The actual classification is based on the presence or absence of specific clinical and biochemical signs together with an in vivo response to exogenous PTH and the results of an in vitro assay to measure Gsa protein activity. However, this classification disregards other related diseases such as acrodysostosis (ACRDYS) or progressive osseous heteroplasia (POH), as well as recent findings of clinical and genetic/epigenetic background of the different subtypes. Therefore, the EuroPHP network decided to develop a new classification that encompasses all disorders with impairments in PTH and/or PTHrP cAMP-mediated pathway. DESIGN AND METHODS: Extensive review of the literature was performed. Several meetings were organised to discuss about a new, more effective and accurate way to describe disorders caused by abnormalities of the PTH/PTHrP signalling pathway. RESULTS AND CONCLUSIONS: After determining the major and minor criteria to be considered for the diagnosis of these disorders, we proposed to group them under the term 'inactivating PTH/PTHrP signalling disorder' (iPPSD). This terminology: (i) defines the common mechanism responsible for all diseases; (ii) does not require a confirmed genetic defect; (iii) avoids ambiguous terms like 'pseudo' and (iv) eliminates the clinical or molecular overlap between diseases. We believe that the use of this nomenclature and classification will facilitate the development of rationale and comprehensive international guidelines for the diagnosis and treatment of iPPSDs.


Assuntos
Proteína Relacionada ao Hormônio Paratireóideo , Hormônio Paratireóideo , Pseudo-Hipoparatireoidismo/classificação , Pseudo-Hipoparatireoidismo/diagnóstico , Doenças Ósseas Metabólicas/sangue , Doenças Ósseas Metabólicas/classificação , Doenças Ósseas Metabólicas/diagnóstico , Disostoses/sangue , Disostoses/classificação , Disostoses/diagnóstico , Europa (Continente) , Humanos , Deficiência Intelectual/sangue , Deficiência Intelectual/classificação , Deficiência Intelectual/diagnóstico , Ossificação Heterotópica/sangue , Ossificação Heterotópica/classificação , Ossificação Heterotópica/diagnóstico , Osteocondrodisplasias/sangue , Osteocondrodisplasias/classificação , Osteocondrodisplasias/diagnóstico , Hormônio Paratireóideo/sangue , Proteína Relacionada ao Hormônio Paratireóideo/sangue , Pseudo-Hipoparatireoidismo/sangue , Dermatopatias Genéticas/sangue , Dermatopatias Genéticas/classificação , Dermatopatias Genéticas/diagnóstico
12.
Age Ageing ; 45(1): 142-8, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26563885

RESUMO

INTRODUCTION: People with intellectual disabilities (ID) are earlier frail than people in the general population. Although this may be explained by lifelong unfavourable social, psychological and clinical causes, underlying physiological pathways might be considered too. Biological measures can help identify pathophysiological pathways. Therefore, we examined the association between frailty and a range of serum markers on inflammation, anaemia, the metabolic system, micronutrients and renal functioning. METHODS: Participants (n = 757) with borderline to severe ID (50+) were recruited from three Dutch ID care and support services. RESULTS: Frailty was measured with a frailty index, a measure based on the accumulation of deficits. Linear regression analyses were performed to identify associations between frailty and biochemical measures independent of age, gender, level of ID and the presence of Down syndrome. Frailty appears associated with inflammation (IL-6 and CRP), anaemia, metabolic markers (glucose, cholesterol and albumin) and renal functioning (cystatin-C and creatinine). DISCUSSION: These results are in line with results observed in the general population. Future research needs to investigate the causal relation between biochemical measures and frailty, with a special focus on inflammation and nutrition. Furthermore, the possibility to screen for frailty using biochemical measures needs to be used.


Assuntos
Envelhecimento , Biomarcadores/sangue , Idoso Fragilizado , Indicadores Básicos de Saúde , Nível de Saúde , Deficiência Intelectual/diagnóstico , Pessoas com Deficiência Mental/psicologia , Fatores Etários , Idoso , Envelhecimento/sangue , Envelhecimento/psicologia , Glicemia/análise , Distribuição de Qui-Quadrado , Creatinina/sangue , Estudos Transversais , Cistatina C/análise , Feminino , Avaliação Geriátrica , Humanos , Mediadores da Inflamação/sangue , Deficiência Intelectual/sangue , Deficiência Intelectual/fisiopatologia , Deficiência Intelectual/psicologia , Rim/fisiopatologia , Modelos Lineares , Lipídeos/sangue , Masculino , Pessoa de Meia-Idade , Países Baixos , Avaliação Nutricional , Estado Nutricional , Prognóstico , Medição de Risco , Fatores de Risco , Albumina Sérica/análise , Albumina Sérica Humana , Índice de Gravidade de Doença
13.
Int J Hematol ; 102(5): 544-52, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26329388

RESUMO

Dyskeratosis congenita (DKC) is an inherited bone marrow failure (BMF) syndrome typified by reticulated skin pigmentation, nail dystrophy, and mucosal leukoplakia. Hoyeraal-Hreidarsson syndrome (HHS) is considered to be a severe form of DKC. Unconventional forms of DKC, which develop slowly in adulthood but without the physical anomalies characteristic of DKC (cryptic DKC), have been reported. Clinical and genetic features of DKC have been investigated in Caucasian, Black, and Hispanic populations, but not in Asian populations. The present study aimed to determine the clinical and genetic features of DKC, HHS, and cryptic DKC among Japanese patients. We analyzed 16 patients diagnosed with DKC, three patients with HHS, and 15 patients with cryptic DKC. We found that platelet count was significantly more depressed than neutrophil count or hemoglobin value in DKC patients, and identified DKC patients with large deletions in the telomerase reverse transcriptase and cryptic DKC patients with RTEL1 mutations on both alleles. This led to some patients previously considered to have unclassifiable BMF being diagnosed with cDKC through identification of new gene mutations. It thus seems important from a clinical viewpoint to re-examine the clinical characteristics, frequency of genetic mutations, and treatment efficacy in DKC, HHS, and cDKC.


Assuntos
Alelos , DNA Helicases , Disceratose Congênita , Retardo do Crescimento Fetal , Deficiência Intelectual , Microcefalia , Mutação , Estudos de Casos e Controles , Criança , Pré-Escolar , DNA Helicases/genética , DNA Helicases/metabolismo , Disceratose Congênita/sangue , Disceratose Congênita/genética , Disceratose Congênita/terapia , Feminino , Retardo do Crescimento Fetal/sangue , Retardo do Crescimento Fetal/genética , Retardo do Crescimento Fetal/terapia , Humanos , Lactente , Deficiência Intelectual/sangue , Deficiência Intelectual/genética , Deficiência Intelectual/terapia , Japão , Masculino , Microcefalia/sangue , Microcefalia/genética , Microcefalia/terapia , Contagem de Plaquetas
14.
Amino Acids ; 47(9): 1893-908, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26031828

RESUMO

Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide (NO) synthesis, whereas L-arginine (Arg) and L-homoarginine (hArg) serve as substrates for NO synthesis. ADMA and other methylated arginines are generally believed to exclusively derive from guanidine (N (G))-methylated arginine residues in proteins by protein arginine methyltransferases (PRMTs) that use S-adenosylmethionine (SAM) as the methyl donor. L-Lysine is known for decades as a precursor for hArg, but only recent studies indicate that arginine:glycine amidinotransferase (AGAT) is responsible for the synthesis of hArg. AGAT catalyzes the formation of guanidinoacetate (GAA) that is methylated to creatine by guanidinoacetate methyltransferase (GAMT) which also uses SAM. The aim of the present study was to learn more about the mechanisms of ADMA and hArg formation in humans. Especially, we hypothesized that ADMA is produced by N (G)-methylation of free Arg in addition to the known PRMTs-involving mechanism. In knockout mouse models of AGAT- and GAMT-deficiency, we investigated the contribution of these enzymes to hArg synthesis. Arg infusion (0.5 g/kg, 30 min) in children (n = 11) and ingestion of high-fat protein meals by overweight men (n = 10) were used to study acute effects on ADMA and hArg synthesis. Daily Arg ingestion (10 g) or placebo for 3 or 6 months by patients suffering from peripheral arterial occlusive disease (PAOD, n = 20) or coronary artery disease (CAD, n = 30) was used to study chronic effects of Arg on ADMA synthesis. Mass spectrometric methods were used to measure all biochemical parameters in plasma and urine samples. In mice, AGAT but not GAMT was found to contribute to plasma hArg, while ADMA synthesis was independent of AGAT and GAMT. Arg infusion acutely increased plasma Arg, hArg and ADMA concentrations, but decreased the plasma hArg/ADMA ratio. High-fat protein meals acutely increased plasma Arg, hArg, ADMA concentrations, as well as the plasma hArg/ADMA ratio. In the PAOD and CAD studies, plasma Arg concentration increased in the verum compared to the placebo groups. Plasma ADMA concentration increased only in the PAOD patients who received Arg. Our study suggests that in humans a minor fraction of free Arg is rapidly metabolized to ADMA and hArg. In mice, GAMT and N (G)-methyltransferases contribute to ADMA and hArg synthesis from Arg, whereas AGAT is involved in the synthesis of hArg but not of ADMA. The underlying biochemical mechanisms remain still elusive.


Assuntos
Arginina/análogos & derivados , Arginina/administração & dosagem , Doença da Artéria Coronariana/sangue , Homoarginina/biossíntese , Doença Arterial Periférica/sangue , Adolescente , Adulto , Amidinotransferases/sangue , Amidinotransferases/deficiência , Amidinotransferases/genética , Amidinotransferases/metabolismo , Erros Inatos do Metabolismo dos Aminoácidos/sangue , Erros Inatos do Metabolismo dos Aminoácidos/tratamento farmacológico , Erros Inatos do Metabolismo dos Aminoácidos/genética , Animais , Arginina/biossíntese , Criança , Doença da Artéria Coronariana/tratamento farmacológico , Doença da Artéria Coronariana/genética , Deficiências do Desenvolvimento/sangue , Deficiências do Desenvolvimento/tratamento farmacológico , Deficiências do Desenvolvimento/genética , Feminino , Guanidinoacetato N-Metiltransferase/sangue , Guanidinoacetato N-Metiltransferase/deficiência , Guanidinoacetato N-Metiltransferase/genética , Guanidinoacetato N-Metiltransferase/metabolismo , Humanos , Deficiência Intelectual/sangue , Deficiência Intelectual/tratamento farmacológico , Deficiência Intelectual/genética , Transtornos do Desenvolvimento da Linguagem/sangue , Transtornos do Desenvolvimento da Linguagem/tratamento farmacológico , Transtornos do Desenvolvimento da Linguagem/genética , Masculino , Camundongos , Camundongos Knockout , Pessoa de Meia-Idade , Transtornos dos Movimentos/sangue , Transtornos dos Movimentos/congênito , Transtornos dos Movimentos/tratamento farmacológico , Transtornos dos Movimentos/genética , Doença Arterial Periférica/tratamento farmacológico , Doença Arterial Periférica/genética , Distúrbios da Fala/sangue , Distúrbios da Fala/tratamento farmacológico , Distúrbios da Fala/genética
15.
Nutrients ; 7(3): 1538-64, 2015 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-25734565

RESUMO

People with neurodevelopmental disorders and intellectual disabilities have much greater health care needs. Mainly staying indoors, such people generally have low 25-hydroxyvitamin D (25(OH)D) concentrations. The Vitamin D Task Force of the American Academy of Developmental Medicine and Dentistry (AADMD) reviewed the evidence of 25(OH)D concentrations that benefit the health of persons with developmental disabilities. Maintaining recommended optimal serum 25(OH)D concentrations year long will benefit skeletal development in infants, children, and adolescents, and benefit musculoskeletal health and neuromuscular coordination in adult patients, and decrease risk of falls. Maintaining optimal concentrations decreases risks and severities of autoimmune diseases, cardiovascular disease, many types of cancer, dementia, types 1 and 2 diabetes mellitus, and respiratory tract infections. Other benefits include improved dental and oral health and improved physical performance. The Task Force recommends that 25(OH)D concentrations for optimal health to be in the range of 75 to 125 nmol/L, which can be achieved using between 800 and 4000 IU/day vitamin D3 and sensible exposure to solar UVB radiation. The paper also discusses the potential risks of higher 25(OH)D concentrations, the evidence from and limitations of randomized controlled trials, and the recommendations by various groups and agencies.


Assuntos
Deficiências do Desenvolvimento , Saúde , Deficiência Intelectual , Deficiência de Vitamina D/tratamento farmacológico , Vitamina D/análogos & derivados , Vitamina D/uso terapêutico , Vitaminas/uso terapêutico , Deficiências do Desenvolvimento/sangue , Deficiências do Desenvolvimento/complicações , Suplementos Nutricionais , Humanos , Deficiência Intelectual/sangue , Deficiência Intelectual/complicações , Luz Solar , Vitamina D/sangue , Deficiência de Vitamina D/sangue , Deficiência de Vitamina D/complicações , Vitaminas/sangue
16.
Eur J Hum Genet ; 23(9): 1254-8, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25564041

RESUMO

Coenzyme Q10 deficiency is a clinically and genetically heterogeneous disorder, with manifestations that may range from fatal neonatal multisystem failure, to adult-onset encephalopathy. We report a patient who presented at birth with severe lactic acidosis, proteinuria, dicarboxylic aciduria, and hepatic insufficiency. She also had dilation of left ventricle on echocardiography. Her neurological condition rapidly worsened and despite aggressive care she died at 23 h of life. Muscle histology displayed lipid accumulation. Electron microscopy showed markedly swollen mitochondria with fragmented cristae. Respiratory-chain enzymatic assays showed a reduction of combined activities of complex I+III and II+III with normal activities of isolated complexes. The defect was confirmed in fibroblasts, where it could be rescued by supplementing the culture medium with 10 µM coenzyme Q10. Coenzyme Q10 levels were reduced (28% of controls) in these cells. We performed exome sequencing and focused the analysis on genes involved in coenzyme Q10 biosynthesis. The patient harbored a homozygous c.545T>G, p.(Met182Arg) alteration in COQ2, which was validated by functional complementation in yeast. In this case the biochemical and morphological features were essential to direct the genetic diagnosis. The parents had another pregnancy after the biochemical diagnosis was established, but before the identification of the genetic defect. Because of the potentially high recurrence risk, and given the importance of early CoQ10 supplementation, we decided to treat with CoQ10 the newborn child pending the results of the biochemical assays. Clinicians should consider a similar management in siblings of patients with CoQ10 deficiency without a genetic diagnosis.


Assuntos
Alquil e Aril Transferases/genética , Ataxia/diagnóstico , Ataxia/genética , Mitocôndrias Musculares/genética , Doenças Mitocondriais/diagnóstico , Doenças Mitocondriais/genética , Debilidade Muscular/diagnóstico , Debilidade Muscular/genética , Mutação Puntual , Ubiquinona/análogos & derivados , Ubiquinona/deficiência , Acidose Láctica/sangue , Acidose Láctica/genética , Acidose Láctica/patologia , Alquil e Aril Transferases/deficiência , Ataxia/sangue , Ataxia/patologia , Consanguinidade , Evolução Fatal , Feminino , Expressão Gênica , Insuficiência Hepática/sangue , Insuficiência Hepática/genética , Insuficiência Hepática/patologia , Humanos , Recém-Nascido , Deficiência Intelectual/sangue , Deficiência Intelectual/genética , Deficiência Intelectual/patologia , Mitocôndrias Musculares/enzimologia , Mitocôndrias Musculares/patologia , Doenças Mitocondriais/sangue , Doenças Mitocondriais/patologia , Debilidade Muscular/sangue , Debilidade Muscular/patologia , Músculo Esquelético/enzimologia , Músculo Esquelético/patologia , Proteinúria/sangue , Proteinúria/genética , Proteinúria/patologia , Aminoacidúrias Renais/sangue , Aminoacidúrias Renais/genética , Aminoacidúrias Renais/patologia , Análise de Sequência de DNA , Ubiquinona/sangue , Ubiquinona/genética
18.
Indian J Gastroenterol ; 33(1): 82-4, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24052374
20.
Hormones (Athens) ; 12(2): 309-11, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23933701

RESUMO

An 18-year-old man was admitted to the clinic complaining of deterioration in the function of his hands and feet. The clinical examination revealed that his movements were clumsy and that he had disproportionally short limbs. In addition, he also had facial abnormalities of frontal bossing, hypertelorism, maxillary hypoplasia, broad low nasal bridge, short upturned nose with anteverted nostrils and triangular mouth. All extremities appeared short with stubby fingers and toes and with broad hands and wrinkling of the dorsal skin. Chromosomal analysis showed a normal (46, XY) karyotype. X-ray studies revealed broad, short metacarpals and phalanges with cone-shaped epiphyses and brachycdactyly and a diagnosis of peripheral dysostosis was confirmed by the characteristic radiographic appearance of the hands. Serum calcium and alkaline phosphatase levels were high, parathormone (PTH) was low, but 25 (OH) Vitamin D, albumin, and 24 hour urine calcium levels were in the normal range. Based on these findings, a diagnosis of acrodysostosis associated with hypercalcemia was made. To the best of our knowledge, this represents the first description of this syndrome.


Assuntos
Disostoses/diagnóstico por imagem , Hipercalcemia/complicações , Deficiência Intelectual/diagnóstico por imagem , Osteocondrodisplasias/diagnóstico por imagem , Adolescente , Ataxia/etiologia , Diagnóstico Diferencial , Disostoses/sangue , Disostoses/complicações , Disostoses/fisiopatologia , Ossos da Mão/diagnóstico por imagem , Humanos , Deficiência Intelectual/sangue , Deficiência Intelectual/complicações , Deficiência Intelectual/fisiopatologia , Masculino , Osteocondrodisplasias/sangue , Osteocondrodisplasias/complicações , Osteocondrodisplasias/fisiopatologia , Pseudo-Hipoparatireoidismo/diagnóstico , Radiografia
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