2003
DOI: 10.1191/0961203303lu329oa
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Homozygous single nucleotide polymorphism of the complement C1QA gene is associated with decreased levels of C1q in patients with subacute cutaneous lupus erythematosus

Abstract: We report an association between a non-familial form of photosensitive Lupus-specific skin disease, subacute cutaneous lupus erythematosus (SCLE), and a new single nucleotide polymorphism (SNP) in the C1QA gene. We also describe an association between this SNP and lower levels of serum C1q. This SNP consists of adenine replacing the third guanine in the codon for aminoacid residue Gly70 (position excludes the 22 amino acid leading peptide) that is located in the second exon of the C1QA gene. We have designated… Show more

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Cited by 79 publications
(67 citation statements)
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References 31 publications
(27 reference statements)
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“…The A allele of C1QA polymorphism rs172378 has been associated with decreased complement activity, resulting in reduced metastasis associated with breast cancer (Petry and Loos, 2005;Racila et al, 2006). The decrease in complement activity is suggested to result in less clearance of apoptotic tumour cells (Racila et al, 2003), and in a more effective antibody response against the tumour. Also, this same allele has been reported to associate with lower levels of serum C1qA protein (Racila et al, 2003).…”
Section: Discussionmentioning
confidence: 99%
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“…The A allele of C1QA polymorphism rs172378 has been associated with decreased complement activity, resulting in reduced metastasis associated with breast cancer (Petry and Loos, 2005;Racila et al, 2006). The decrease in complement activity is suggested to result in less clearance of apoptotic tumour cells (Racila et al, 2003), and in a more effective antibody response against the tumour. Also, this same allele has been reported to associate with lower levels of serum C1qA protein (Racila et al, 2003).…”
Section: Discussionmentioning
confidence: 99%
“…The decrease in complement activity is suggested to result in less clearance of apoptotic tumour cells (Racila et al, 2003), and in a more effective antibody response against the tumour. Also, this same allele has been reported to associate with lower levels of serum C1qA protein (Racila et al, 2003). Therefore, we hypothesised that the A allele, or another allele in tight linkage disequilibrium, could have a regulatory role and could correlate with lower expression of C1qA.…”
Section: Discussionmentioning
confidence: 99%
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“…The complement proteins C1q, C3 and C4 are deposited at the site of inflammation in the kidney and play an important role in the pathogenesis of LN. It is well known that hereditary C1q deficiency is strongly related to SLE, but there are several and inconsistent studies exploring single nucleotide poly-morphisms (SNPs) of the C1q gene cluster in relation to the pathogenesis of SLE (1)(2)(3)(4)(5)(6)(7)(8)(9)(10).…”
Section: Introductionmentioning
confidence: 99%