TY - JOUR
T1 - Identification of genetic modifiers of age-at-onset for familial Parkinson's disease
AU - Hill-Burns, Erin M.
AU - Ross, Owen A.
AU - Wissemann, William T.
AU - Soto-Ortolaza, Alexandra I.
AU - Zareparsi, Sepideh
AU - Siuda, Joanna
AU - Lynch, Timothy
AU - Wszolek, Zbigniew K.
AU - Silburn, Peter A.
AU - Mellick, George D.
AU - Ritz, Beate
AU - Scherzer, Clemens R.
AU - Zabetian, Cyrus P.
AU - Factor, Stewart A.
AU - Breheny, Patrick J.
AU - Payami, Haydeh
N1 - Publisher Copyright:
© The Author 2016. Published by Oxford University Press. All rights reserved.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Parkinson's disease (PD) is the most common cause of neurodegenerative movement disorder and the second most common cause of dementia. Genes are thought to have a stronger effect on age-at-onset of PD than on risk, yet there has been a phenomenal success in identifying risk loci but not age-at-onset modifiers. We conducted a genome-wide study for age-at-onset. We analysed familial and non-familial PD separately, per prior evidence for strong genetic effect on age-at-onset in familial PD. GWAS was conducted in 431 unrelated PD individuals with at least one affected relative (familial PD) and 1544 nonfamilial PD from the NeuroGenetics Research Consortium (NGRC); an additional 737 familial PD and 2363 non-familial PD were used for replication. In familial PD, two signals were detected and replicated robustly: one mapped to LHFPL2 on 5q14.1 (PNGRC=3E-8, PReplication=2E-5, PNGRC+Replication=1E-11), the second mapped to TPM1 on 15q22.2 (PNGRC=8E-9, PReplication=2E- 4, PNGRC+Replication=9E-11). The variants that were associated with accelerated onset had low frequencies (<0.02). The LHFPL2 variant was associated with earlier onset by 12.33 [95% CI: 6.2; 18.45] years in NGRC, 8.03 [2.95; 13.11] years in replication, and 9.79 [5.88; 13.70] years in the combined data. The TPM1 variant was associated with earlier onset by 15.30 [8.10; 22.49] years in NGRC, 9.29 [1.79; 16.79] years in replication, and 12.42 [7.23; 17.61] years in the combined data. Neither LHFPL2 nor TPM1 was associated with age-at-onset in non-familial PD. LHFPL2 (function unknown) is overexpressed in brain tumours. TPM1 encodes a highly conserved protein that regulates muscle contraction, and is a tumour-suppressor gene.
AB - Parkinson's disease (PD) is the most common cause of neurodegenerative movement disorder and the second most common cause of dementia. Genes are thought to have a stronger effect on age-at-onset of PD than on risk, yet there has been a phenomenal success in identifying risk loci but not age-at-onset modifiers. We conducted a genome-wide study for age-at-onset. We analysed familial and non-familial PD separately, per prior evidence for strong genetic effect on age-at-onset in familial PD. GWAS was conducted in 431 unrelated PD individuals with at least one affected relative (familial PD) and 1544 nonfamilial PD from the NeuroGenetics Research Consortium (NGRC); an additional 737 familial PD and 2363 non-familial PD were used for replication. In familial PD, two signals were detected and replicated robustly: one mapped to LHFPL2 on 5q14.1 (PNGRC=3E-8, PReplication=2E-5, PNGRC+Replication=1E-11), the second mapped to TPM1 on 15q22.2 (PNGRC=8E-9, PReplication=2E- 4, PNGRC+Replication=9E-11). The variants that were associated with accelerated onset had low frequencies (<0.02). The LHFPL2 variant was associated with earlier onset by 12.33 [95% CI: 6.2; 18.45] years in NGRC, 8.03 [2.95; 13.11] years in replication, and 9.79 [5.88; 13.70] years in the combined data. The TPM1 variant was associated with earlier onset by 15.30 [8.10; 22.49] years in NGRC, 9.29 [1.79; 16.79] years in replication, and 12.42 [7.23; 17.61] years in the combined data. Neither LHFPL2 nor TPM1 was associated with age-at-onset in non-familial PD. LHFPL2 (function unknown) is overexpressed in brain tumours. TPM1 encodes a highly conserved protein that regulates muscle contraction, and is a tumour-suppressor gene.
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U2 - 10.1093/hmg/ddw206
DO - 10.1093/hmg/ddw206
M3 - Article
C2 - 27402877
AN - SCOPUS:85014315781
SN - 0964-6906
VL - 25
SP - 3849
EP - 3862
JO - Human molecular genetics
JF - Human molecular genetics
IS - 17
ER -