Methods of treating or suppressing pervasive developmental disorders (PDDs) including; autistic disorder, Asperger's syndrome, childhood disintegrative disorder (CDD), Rett's disorder, and PDD-not otherwise specified (PDD-NOS) or attention deficit/hyperactivity disorder (ADHD) comprising administering to a subject in need thereof a therapeutically effective amount of one or more compounds as disclosed herein.

Methods of treating or suppressing pervasive developmental disorders (PDDs) including; autistic disorder, Asperger's syndrome, childhood disintegrative disorder (CDD), Rett's disorder, and PDD-not otherwise specified (PDD-NOS) or attention deficit/hyperactivity disorder (ADHD) comprising administering to a subject in need thereof a therapeutically effective amount of one or more compounds as disclosed herein.

The disclosure provides therapeutic compounds, compositions (e.g., therapeutic agents or medicaments) and methods for preventing or treating mitochondrial disease such as Friedreich's ataxia in a mammalian subject, reducing risk factors, signs and/or symptoms associated with mitochondrial disease, such as Friedreich's ataxia, and/or reducing the likelihood or severity of mitochondrial disease such as Friedreich's ataxia. The disclosure further provides novel intermediates for the production of said therapeutic compositions. In some instances, the intermediates may themselves by therapeutic agents or prodrugs of therapeutic agents (e.g. reduced forms of the therapeutic compounds).

Methods of treating or suppressing pervasive developmental disorders (PDDs) including; autistic disorder, Asperger's syndrome, childhood disintegrative disorder (CDD), Rett's disorder, and PDD-not otherwise specified (PDD-NOS) or attention deficit/hyperactivity disorder (ADHD) comprising administering to a subject in need thereof a therapeutically effective amount of one or more compounds as disclosed herein.

The subject invention relates to improved tocopheryl quinine derivatives and tocopherol derivatives having improved pharmacokinetics in vivo that can, in some embodiments, be useful in the treatment of Lysosomal Storage Disorder, restoration of normal mitochondrial ATP production, modulation of intracellular calcium ion concentration and other treatments or therapies. The tocopheryl quinone derivatives and tocopherol derivatives have side chains that have terminally halogenated carbon atoms.

The subject invention relates to improved tocopheryl quinine derivatives and tocopherol derivatives having improved pharmacokinetics in vivo that can, in some embodiments, be useful in the treatment of Lysosomal Storage Disorder, restoration of normal mitochondrial ATP production, modulation of intracellular calcium ion concentration and other treatments or therapies. The tocopheryl quinone derivatives and tocopherol derivatives have side chains that have terminally halogenated carbon atoms.

Methods of treating or suppressing mitochondrial diseases, such as Friedreich's ataxia (FRDA), Leber's Hereditary Optic Neuropathy (LHON), mitochondrial myopathy, encephalopathy, lactacidosis, stroke (MELAS), or Kearns-Sayre Syndrome (KSS) are disclosed, as well as compounds useful in the methods of the invention. Methods and compounds useful in treating other disorders are also disclosed. Energy biomarkers useful in assessing the metabolic state of a subject and the efficacy of treatment are also disclosed. Methods of modulating, normalizing, or enhancing energy biomarkers, as well as compounds useful for such methods, are also disclosed.

Methods of treating or suppressing mitochondrial diseases, such as Friedreich's ataxia (FRDA), Leber's Hereditary Optic Neuropathy (LHON), mitochondrial myopathy, encephalopathy, lactacidosis, stroke (MELAS), or Kearns-Sayre Syndrome (KSS) are disclosed, as well as compounds useful in the methods of the invention. Methods and compounds useful in treating other disorders are also disclosed. Energy biomarkers useful in assessing the metabolic state of a subject and the efficacy of treatment are also disclosed. Methods of modulating, normalizing, or enhancing energy biomarkers, as well as compounds useful for such methods, are also disclosed.

The disclosure provides therapeutic compounds, compositions (e.g., therapeutic agents or medicaments) and methods for preventing or treating mitochondrial disease such as Friedreich's ataxia in a mammalian subject, reducing risk factors, signs and/or symptoms associated with mitochondrial disease, such as Friedreich's ataxia, and/or reducing the likelihood or severity of mitochondrial disease such as Friedreich's ataxia. The disclosure further provides novel intermediates for the production of said therapeutic compositions. In some instances, the intermediates may themselves by therapeutic agents or prodrugs of therapeutic agents (e.g. reduced forms of the therapeutic compounds).

Methods of treating or suppressing pervasive developmental disorders (PDDs) including; autistic disorder, Asperger's syndrome, childhood disintegrative disorder (CDD), Rett's disorder, and PDD-not otherwise specified (PDD-NOS) or attention deficit/hyperactivity disorder (ADHD) comprising administering to a subject in need thereof a therapeutically effective amount of one or more compounds as disclosed herein.