Abstract: Aspects of the disclosure relate to methods and compositions (e.g., kits) for detecting certain repeat-associated non-ATG (RAN) proteins in a subject (e.g., a subject having or suspected of having a disease associated with a CAG and/or CTG repeat expansion). In some embodiments, methods described by the disclosure comprise detecting one or more RAN proteins in a biological sample obtained from a subject by an immunoassay using one or more antibodies that target homopolymeric repeat regions of RAN proteins. In some embodiments, the disclosure relates to kits comprising one or more antibodies that target homopolymeric repeat regions of RAN proteins, and an immunoassay plate and/or reagents. In some embodiments, the disclosure provides methods of producing anti-RAN protein antibodies.

Abstract: The present disclosure provides the use of compounds of Formulae (I), (II), (III), (III-A), and (III-B) (e.g., metformin) in treating a neurological disease associated with repeat expansions and/or RAN protein accumulation, reducing the level of one or more repeat associated non-ATG (RAN) proteins, and reducing the accumulation of RAN proteins in a subject and/or biological sample. Also provided is the use of compounds of Formulae (I), (II), (III), (III-A), and (III-B) (e.g., metformin) in inhibiting RAN protein translation in a subject and in a biological sample (e.g., cells, tissue). Also provided in the present disclosure are pharmaceutical compositions, Skits, and uses of compounds of Formulae (I), (II), (III), (III-A), and (III-B) (e.g., metformin) for treating diseases associated with repeat expansions.

Abstract: Aspects of the disclosure relate to methods and compositions (e.g., biomarkers) useful for diagnosing pre- symptomatic amyotrophic lateral sclerosis (ALS) and/or frontotemporal dementia (FTD), and for monitoring the progression of ALS/FTD in subjects diagnosed with the disease. Methods of treating neurodegenerative diseases (e.g., ALS/FTD) are also described.

Abstract: The disclosure provides methods for the diagnosis of Huntington's disease. In some embodiments, the method comprises detecting one or more repeat associated non-ATG (RAN) proteins in a biological sample.

Abstract: Aspects of the disclosure relate to compositions and methods for eliciting (or enhancing) anti-repeat-associated non-ATG (RAN) protein antibody expression or production in a subject. Administration of the compositions according to the methods of the present disclosure may in some embodiments result in decreased levels of RAN protein expression and/or aggregation. Such compositions and methods may therefore be useful for the treatment of diseases and disorders known to be associated with RAN proteins.

Abstract: Methods and compositions for modulating repeat non-ATG protein (RAN protein) translation are provided. In some aspects, the disclosure provides methods of inhibiting RAN protein translation by contacting a cell with an effective amount of an inhibitor of eIF2 phosphorylation or an inhibitor of protein kinase R (PKR). In some embodiments, methods described by the disclosure are useful for treating diseases associated with RAN protein translation, such as certain neurodegenerative diseases.

Abstract: Aspects of the disclosure relate to methods and compositions (e.g., kits) for detecting anti-repeat-associated non-ATG (RAN) protein antibodies in a subject (e.g., a subject that has been administered a therapeutic anti-RAN protein antibody or a vaccine against a disease or disorder associated with RAN protein expression, translation, and/or accumulation, for example amyotrophic lateral sclerosis (ALS) and/or frontotemporal dementia (FTD)). In some embodiments, methods described by the disclosure comprise detecting one or more anti-RAN protein antibodies in a biological sample obtained from a subject by an electrochemiluminescence-based immunoassay using one or more target di-amino acid repeat peptides. In some embodiments, the disclosure relates to kits comprising one or more di-amino acid repeat peptides and an electrochemiluminescence-based immunoassay plate and/or reagents.

Abstract: Aspects of the disclosure relate to compositions and methods for the diagnosis and/or treatment of certain neurodegenerative diseases, for example those diseases associated with repeat-associated non-ATG (RAN) translation proteins, such as Alzheimer's disease (AD). In some embodiments, the disclosure relates to identifying a subject having a RAN protein-associated disease by detecting expression or activity of repeat-associated non-ATG (RAN) translation proteins (e.g., RAN proteins). In some embodiments, the disclosure relates to methods of treating a RAN protein-associated disease by administering to a subject in need thereof an agent that reduces expression or activity of RAN proteins.

Abstract: Methods and compositions for modulating repeat non-ATG protein (RAN protein) translation are provided. In some aspects, the disclosure provides methods of inhibiting RAN protein translation by contacting a cell with an effective amount of an inhibitor of eIF2 phosphorylation or an inhibitor of protein kinase R (PKR). In some embodiments, methods described by the disclosure are useful for treating diseases associated with RAN protein translation, such as certain neurodegenerative diseases.

Abstract: Disclosed herein are methods and compositions for identifying and/or treating subjects having or likely to have amyotrophic lateral sclerosis (ALS) or frontotemporal dementia (FTD). Antibodies specific for one or more di-amino acid repeat-containing proteins are also provided herein.

Abstract: Methods and compositions for modulating repeat non-ATG protein (RAN protein) translation are provided. In some aspects, the disclosure relates to methods for treating a subject having a disease associated with RAN protein translation by administering the subject a modulator of eIF3 or an eIF3 subunit, or an antibody that bind to a RAN protein.

Abstract: Disclosed herein are methods and compositions for identifying and/or treating subjects having or likely to have amyotrophic lateral sclerosis (ALS) or frontotemporal dementia (FTD). Antibodies specific for one or more di-amino acid repeat-containing proteins are also provided herein.

Abstract: Methods and compositions for modulating repeat non-ATG protein (RAN protein) translation are provided. In some aspects, the disclosure relates to methods for treating a subject having a disease associated with RAN protein translation by administering the subject a modulator of eIF3 or an eIF3 subunit, or an antibody that bind to a RAN protein.

Abstract: Disclosed herein are methods and compositions for identifying and/or treating subjects having or likely to have amyotrophic lateral sclerosis (ALS) or frontotemporal dementia (FTD). Antibodies specific for one or more di-amino acid repeat-containing proteins are also provided herein.

Abstract: The present disclosure provides the use of compounds of Formulae (I), (II), (III), (III-A), and (III-B) (e.g., metformin) in treating a neurological disease associated with repeat expansions and/or RAN protein accumulation, reducing the level of one or more repeat associated non-ATG (RAN) proteins, and reducing the accumulation of RAN proteins in a subject and/or biological sample. Also provided is the use of compounds of Formulae (I), (II), (III), (III-A), and (III-B) (e.g., metformin) in inhibiting RAN protein translation in a subject and in a biological sample (e.g., cells, tissue). Also provided in the present disclosure are pharmaceutical compositions, Skits, and uses of compounds of Formulae (I), (II), (III), (III-A), and (III-B) (e.g., metformin) for treating diseases associated with repeat expansions.

Abstract: The disclosure provides methods for the diagnosis of Huntington's disease. In some embodiments, the method comprises detecting one or more repeat associated non-ATG (RAN) proteins in a biological sample.

Abstract: Aspects of the disclosure relate to methods and compositions (e.g., kits) for detecting repeat-associated non-ATG (RAN) proteins in a subject (e.g., a subject having or suspected of having a disease associated with RAN protein translation, for example amyotrophic lateral sclerosis (ALS) and/or frontotemporal dementia (FTD), or spinocerebellar ataxia type 36 (SCA36), or other diseases that produce poly(PR), poly(GR) or poly(GP) RAN proteins. In some embodiments, methods described by the disclosure comprise detecting one or more RAN proteins in a biological sample obtained from a subject by an electrochemiluminescence-based immunoassay using one or more anti-RAN protein antibodies. In some embodiments, the disclosure relates to kits comprising one or more anti-RAN antibodies and an electrochemiluminescence-based immunoassay plate and/or reagents.

Abstract: Methods and compositions for modulating repeat non-ATG protein (RAN protein) translation are provided. In some aspects, the disclosure relates to methods for treating a subject having a disease associated with RAN protein translation by administering the subject a modulator of eIF3 or an eIF3 subunit, or an antibody that bind to a RAN protein.

Abstract: Disclosed herein are methods and compositions for identifying and/or treating subjects having or likely to have amyotrophic lateral sclerosis (ALS) or frontotemporal dementia (FTD). Antibodies specific for one or more di-amino acid repeat-containing proteins are also provided herein.

Abstract: Methods and compositions for modulating repeat non-ATG protein (RAN protein) translation are provided. In some aspects, the disclosure provides methods of inhibiting RAN protein translation by contacting a cell with an effective amount of an inhibitor of eIF2 phosphorylation or an inhibitor of protein kinase R (PKR). In some embodiments, methods described by the disclosure are useful for treating diseases associated with RAN protein translation, such as certain neurodegenerative diseases.