Assessment of complement C4 gene copy number using the paralog ratio test.
Assessment of complement C4 gene copy number using the paralog ratio test.
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DOI:
10.1002/humu.21259
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发表时间:
2010-07
期刊:
影响因子:
3.9
通讯作者:
Vyse, Timothy J.
中科院分区:
文献类型:
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作者:
Fernando, Michelle M. A.;Boteva, Lora;Morris, David L.;Zhou, Bi;Wu, Yee Ling;Lokki, Marja-Liisa;Yu, Chack Yung;Rioux, John D.;Hollox, Edward J.;Vyse, Timothy J.
The complement C4 locus is in the class III region of the MHC, and exhibits copy number variation. Complement C4 null alleles have shown association with a number of diseases including systemic lupus erythematosus (SLE). However, most studies to date have used protein immunophenotyping and not direct interrogation of the genome to determine C4 null allele status. Moreover, a lack of accurate C4 gene copy number (GCN) estimation and tight linkage disequilibrium across the disease-associated MHC haplotypes has confounded attempts to establish whether or not these associations are causal. We have therefore developed a high through-put paralog ratio test (PRT) in association with two restriction enzyme digest variant ratio tests (REDVRs) to determine total C4 GCN, C4A GCN, and C4B GCN. In the densely genotyped CEU cohort we show that this method is accurate and reproducible when compared to gold standard Southern blot copy number estimation with a discrepancy rate of 9%. We find a broad range of C4 GCNs in the CEU and the 1958 British Birth Cohort populations under study. In addition, SNP-C4 CNV analyses show only moderate levels of correlation and therefore do not support the use of SNP genotypes as proxies for complement C4 GCN.
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影响因子:
4.4
作者:
Franciotta, D;Cuccia, M;Cosi, V
通讯作者:
Cosi, V
影响因子:
3.9
作者:
Hollox, Edward J.;Detering, Jan-Christoph;Dehnugara, Tushna
通讯作者:
Dehnugara, Tushna
影响因子:
11.4
作者:
CARROLL, MC;PALSDOTTIR, A;PORTER, RR
通讯作者:
PORTER, RR
影响因子:
4.4
作者:
KRAMER, J;RAJCZY, K;FUST, G
通讯作者:
FUST, G
影响因子:
64.8
作者:
通讯作者:
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