PMID- 16962786 OWN - NLM STAT- MEDLINE DCOM- 20070123 LR - 20131121 IS - 0969-9961 (Print) IS - 0969-9961 (Linking) VI - 24 IP - 2 DP - 2006 Nov TI - Brain-derived neurotrophic factor does not influence age at neurologic onset of Huntington's disease. PG - 280-5 AB - In Huntington's disease (HD), genetic factors in addition to the HD CAG repeat mutation play a significant role in determining age at neurologic onset. Brain-derived neurotrophic factor (BDNF), a survival factor for striatal neurons, has been implicated as a target of regulation by huntingtin and is an attractive candidate as a genetic modifier. We tested this hypothesis by genotyping a SNP known to alter BDNF function (rs6265, also termed Val66Met) and a SNP associated with Alzheimer disease (BDNF C270T), along with two BDNF intronic SNPs (rs7103411, rs11030104), in 228 cases with extreme young onset and 329 cases with extreme old onset of HD. No differences were seen between groups for allele frequencies or genotype frequencies for any SNP. Furthermore, no association to onset age was seen in GEE models controlling for HD repeat size or in haplotype analyses of these SNPs. These results indicate that BDNF does not influence significantly the mechanisms in HD pathogenesis that lead to neurologic onset. FAU - Kishikawa, Shotaro AU - Kishikawa S AD - Molecular Neurogenetics Unit, Center for Human Genetic Research, Massachusetts General Hospital, and Department of Neurology, Boston University School of Medicine, MA 02114, USA. FAU - Li, Jian-Liang AU - Li JL FAU - Gillis, Tammy AU - Gillis T FAU - Hakky, Michael M AU - Hakky MM FAU - Warby, Simon AU - Warby S FAU - Hayden, Michael AU - Hayden M FAU - MacDonald, Marcy E AU - MacDonald ME FAU - Myers, Richard H AU - Myers RH FAU - Gusella, James F AU - Gusella JF LA - eng GR - NS16375/NS/NINDS NIH HHS/United States GR - NS32765/NS/NINDS NIH HHS/United States GR - P50NS016367/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20060907 PL - United States TA - Neurobiol Dis JT - Neurobiology of disease JID - 9500169 RN - 0 (Brain-Derived Neurotrophic Factor) RN - AE28F7PNPL (Methionine) RN - HG18B9YRS7 (Valine) SB - IM MH - Age of Onset MH - Alzheimer Disease/genetics MH - Amino Acid Substitution/genetics MH - Brain-Derived Neurotrophic Factor/chemistry/*genetics/metabolism MH - DNA Mutational Analysis MH - Gene Frequency/genetics MH - Genetic Predisposition to Disease/*genetics MH - Genetic Testing MH - Genotype MH - Haplotypes/genetics MH - Huntington Disease/*epidemiology/*genetics/physiopathology MH - Introns/genetics MH - Methionine/genetics MH - Polymorphism, Single Nucleotide/*genetics MH - Trinucleotide Repeat Expansion/genetics MH - Valine/genetics EDAT- 2006/09/12 09:00 MHDA- 2007/01/24 09:00 CRDT- 2006/09/12 09:00 PHST- 2006/05/27 00:00 [received] PHST- 2006/07/13 00:00 [revised] PHST- 2006/07/17 00:00 [accepted] PHST- 2006/09/12 09:00 [pubmed] PHST- 2007/01/24 09:00 [medline] PHST- 2006/09/12 09:00 [entrez] AID - S0969-9961(06)00173-2 [pii] AID - 10.1016/j.nbd.2006.07.008 [doi] PST - ppublish SO - Neurobiol Dis. 2006 Nov;24(2):280-5. doi: 10.1016/j.nbd.2006.07.008. Epub 2006 Sep 7.