Robens BK, Gembé E, Fassunke J, Becker AJ, Schoch S, Grote A. Abundance of LRP12 C-rs9694676 allelic promoter variant in epilepsy-associated gangliogliomas.
Life Sci 2016;
155:70-5. [PMID:
27142828 DOI:
10.1016/j.lfs.2016.01.049]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 01/14/2016] [Accepted: 01/30/2016] [Indexed: 11/28/2022]
Abstract
AIMS
Chronic epilepsy associated gangliogliomas (GGs) represent tumors composed of irregularly distributed, often dysmorphic, neurons and neoplastic astroglia. The pathogenesis of GGs is largely unknown. Low-density lipoprotein receptor-related protein 12 (LRP12) is critical for brain development and involved in tumorigenesis of non-cerebral neoplasms.
MAIN METHODS
Here, we have examined a potential role of LRP12 in the pathogenesis of GGs by a combination of mRNA quantification and molecular-biological in vitro assays.
KEY FINDINGS
We observed a significant increase of the single nucleotide polymorphism (SNP) rs9694676 C-allele, located in the LRP12 promoter, in GGs compared to normal control individuals. C-allele expression is correlated with abundant seizure frequency. Expression of LRP12 was lower in GGs than in control brain. In luciferase assays, the C-allele of rs9694676 decreases both, the basal LRP12 core promoter activity and the stimulatory effect of the transcription factor (TF) STAT5a.
SIGNIFICANCE
Accumulation of functional promoter-associated allelic variants with impact on the transcriptional regulation of LRP12 provides a new pathomechanism for GGs, i.e. highly differentiated epileptogenic brain tumors.
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