TY - JOUR
T1 - Poly(GR) and poly(GA) in cerebrospinal fluid as potential biomarkers for C9ORF72-ALS/FTD
AU - Krishnan, Gopinath
AU - Raitcheva, Denitza
AU - Bartlett, Daniel
AU - Prudencio, Mercedes
AU - McKenna-Yasek, Diane M.
AU - Douthwright, Catherine
AU - Oskarsson, Björn E.
AU - Ladha, Shafeeq
AU - King, Oliver D.
AU - Barmada, Sami J.
AU - Miller, Timothy M.
AU - Bowser, Robert
AU - Watts, Jonathan K.
AU - Petrucelli, Leonard
AU - Brown, Robert H.
AU - Kankel, Mark W.
AU - Gao, Fen Biao
N1 - Funding Information:
We thank many patients and their families for the CSF samples used in this study. The NIH Intramural study NCT01925196 led by Dr. Mary Kay Floeter and the NEALS Biorepository led by Dr. James D. Berry provided some CSF samples from patients with ALS and healthy people. The detection and capture antibodies used to evaluate CSF poly(GA) levels were discovered at Neurimmune. This work was supported by grants from the Association for Frontotemporal Degeneration and the Target ALS Foundation (F.-B.G., M.K., S.J.B., and R.B.), the NIH (R37NS057553 and R01NS101986 to F.-B.G., R01NS111990 to R.H.B. and J.K.W.; R01NS078398 to T.M.M.; R35NS097273, P01NS084974, and P01NS099114 to L.P.), and the Angel Fund for ALS Research (R.H.B.) ALS Association (T.M.M.), Biogen (T.M.M.).
Funding Information:
We thank many patients and their families for the CSF samples used in this study. The NIH Intramural study NCT01925196 led by Dr. Mary Kay Floeter and the NEALS Biorepository led by Dr. James D. Berry provided some CSF samples from patients with ALS and healthy people. The detection and capture antibodies used to evaluate CSF poly(GA) levels were discovered at Neurimmune. This work was supported by grants from the Association for Frontotemporal Degeneration and the Target ALS Foundation (F.-B.G., M.K., S.J.B., and R.B.), the NIH (R37NS057553 and R01NS101986 to F.-B.G., R01NS111990 to R.H.B. and J.K.W.; R01NS078398 to T.M.M.; R35NS097273, P01NS084974, and P01NS099114 to L.P.), and the Angel Fund for ALS Research (R.H.B.) ALS Association (T.M.M.), Biogen (T.M.M.).
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - GGGGCC repeat expansion in C9ORF72, which can be translated in both sense and antisense directions into five dipeptide repeat (DPR) proteins, including poly(GP), poly(GR), and poly(GA), is the most common genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Here we developed sensitive assays that can detect poly(GA) and poly(GR) in the cerebrospinal fluid (CSF) of patients with C9ORF72 mutations. CSF poly(GA) and poly(GR) levels did not correlate with age at disease onset, disease duration, or rate of decline of ALS Functional Rating Scale, and the average levels of these DPR proteins were similar in symptomatic and pre-symptomatic patients with C9ORF72 mutations. However, in a patient with C9ORF72-ALS who was treated with antisense oligonucleotide (ASO) targeting the aberrant C9ORF72 transcript, CSF poly(GA) and poly(GR) levels decreased approximately 50% within 6 weeks, indicating they may serve as sensitive fluid-based biomarkers in studies directed against the production of GGGGCC repeat RNAs or DPR proteins.
AB - GGGGCC repeat expansion in C9ORF72, which can be translated in both sense and antisense directions into five dipeptide repeat (DPR) proteins, including poly(GP), poly(GR), and poly(GA), is the most common genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Here we developed sensitive assays that can detect poly(GA) and poly(GR) in the cerebrospinal fluid (CSF) of patients with C9ORF72 mutations. CSF poly(GA) and poly(GR) levels did not correlate with age at disease onset, disease duration, or rate of decline of ALS Functional Rating Scale, and the average levels of these DPR proteins were similar in symptomatic and pre-symptomatic patients with C9ORF72 mutations. However, in a patient with C9ORF72-ALS who was treated with antisense oligonucleotide (ASO) targeting the aberrant C9ORF72 transcript, CSF poly(GA) and poly(GR) levels decreased approximately 50% within 6 weeks, indicating they may serve as sensitive fluid-based biomarkers in studies directed against the production of GGGGCC repeat RNAs or DPR proteins.
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UR - http://www.scopus.com/inward/citedby.url?scp=85130378863&partnerID=8YFLogxK
U2 - 10.1038/s41467-022-30387-4
DO - 10.1038/s41467-022-30387-4
M3 - Article
C2 - 35589711
AN - SCOPUS:85130378863
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 2799
ER -