124 studies found for:    "Renpenning syndrome" OR "Mental Retardation, X-Linked"
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21 Active, not recruiting A 6-week, Study of MG01CI Low Dose and High Dose Compared With Placebo in Adults and Adolescents With Fragile X Syndrome
Condition: Fragile X Syndrome
Intervention: Drug: MG01CI extended-release tablet
22 Completed Screening Study to Identify Pediatric Patients With Hunter Syndrome Who Demonstrate Evidence of Central Nervous System (CNS) Involvement and Who Are Currently Receiving Treatment With Elaprase®
Condition: Hunter Syndrome
Interventions: Behavioral: Neurobehavioral testing;   Other: Visual and auditory assessments
23 Unknown  Teaching Math Skills to Individuals With Fragile X Syndrome
Conditions: Developmental Disabilities;   Fragile X Syndrome
Intervention: Behavioral: discrete-trial training
24 Completed Exercise Study of Function and Pathology for Women With X-linked Adrenoleukodystrophy
Condition: X-linked Adrenoleukodystrophy
Intervention: Behavioral: exercise training
25 Withdrawn Trial of Kuvan in Lesch-Nyhan Disease
Condition: Behavioral Manifestations of Lesch-Nyhan Disease
Intervention: Drug: sapropterin
26 Recruiting Mucopolysaccharidosis (MPS) I, II, and VI Screening in a High-Risk Population With Previous Surgical Repair or Presence of Inguinal and/or Umbilical Hernia in Combination With Pediatric ENT Surgery (The HATT Project)
Conditions: Mucopolysaccharidosis;   Mucopolysaccharidosis I;   Mucopolysaccharidosis II;   Mucopolysaccharidosis VI
Intervention:
27 Completed Creatine Metabolism in Rett Syndrome
Condition: Rett Syndrome
Intervention:
28 Recruiting A PET Brain Imaging Study of mGluR5 in Subjects With Neuropsychiatric Conditions
Conditions: Parkinson Disease;   Huntington Disease;   Autistic Spectrum Disorders;   Fragile X Syndrome;   Alzheimer Disease;   Mild Cognitive Impairment
Intervention: Drug: [18F]FPEB
29 Terminated Study to Detect Unrecognized Mucopolysaccharidosis in Children Visiting Rheumatology, Hand or Skeletal Dysplasia Clinics
Conditions: Mucopolysaccharidoses;   Mucopolysaccharidosis I;   Mucopolysaccharidosis II;   Mucopolysaccharidosis IV;   Mucopolysaccharidosis VI
Intervention: Other: Dried blood spot test for MPS
30 Completed Randomized Controlled Study of Donepezil in Fragile X Syndrome
Condition: Fragile X Syndrome
Interventions: Drug: donepezil hydrochloride;   Drug: sugar pill
31 Completed Safety and Efficacy Study of Antioxidants for the Treatment of the Fragile X Syndrome
Condition: Fragile X Syndrome
Interventions: Dietary Supplement: Ascorbic Acid (Vitamin C) and Alpha-tocopherol (Vitamin E);   Dietary Supplement: Placebo
32 Completed Compassionate Treatment of Patients With Inborn Errors of Bile Acid Metabolism With Cholic Acid
Conditions: Infantile Refsum's Disease;   Zellweger Syndrome;   Adrenoleukodystrophy;   Peroxisomal Disorders;   Cholestasis
Intervention: Drug: Cholic Acids
33 Unknown  The Psychiatric and Cognitive Phenotypes in Velocardiofacial Syndrome
Conditions: Velocardiofacial Syndrome;   Williams Syndrome;   Fragile X Syndrome
Intervention: Drug: methylphenidate, fluoxetin, risperidone
34 Completed Efficacy and Safety Study of STX209 (Arbaclofen) for the Treatment of Social Withdrawal in Children With Fragile X Syndrome
Condition: Fragile X Syndrome
Interventions: Drug: arbaclofen;   Drug: Placebo
35 Recruiting The Long-term Safety Study of Idursulfase-beta in Hunter Syndrome(Mucopolysaccharidosis II) Patients
Condition: Hunter Syndrome
Intervention:
36 Completed Safety and Efficacy of AFQ056 in Adult Patients With Fragile X Syndrome
Condition: Fragile X Syndrome
Interventions: Drug: AFQ056;   Drug: Placebo
37 Active, not recruiting Observational Study to Evaluate Neurodevelopmental Status in Pediatric Patients With Hunter Syndrome (MPS II)
Conditions: Mucopolysaccharidosis II;   MPS II;   Hunter Syndrome
Intervention:
38 Completed An Open-Label Trial of Donepezil in Fragile X Syndrome
Condition: Fragile X Syndrome
Intervention: Drug: donepezil
39 Completed Functional Abilities in Rett Syndrome
Condition: Rett Syndrome
Intervention:
40 Completed Efficacy and Safety Study of STX209 (Arbaclofen) for Social Withdrawal in Adolescents and Adults With Fragile X Syndrome
Condition: Fragile X Syndrome
Interventions: Drug: arbaclofen;   Drug: placebo

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Indicates status has not been verified in more than two years