GPC3

GPC3

A gene on chromosome Xq26.1 that encodes glypican 3, a cell surface proteoglycan with heparan sulfate that inhibits the dipeptidyl peptidase activity of DPP4. It may be involved in modulating growth of mesodermal tissues, in IGF2-receptor interactions, and in cellular growth and tumourigenesis.

Molecular Pathology
Defects in GPC3 cause Simpson-Golabi-Behmel syndrome.
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References in periodicals archive ?
In the absence of HN3, growth factors bind to GPC3 and promote cell proliferation13.
Tumours were classified as positive when they showed >5% positivity and negative when showing 5% (cytoplasmic and membranous) positivity and GPC3 negative when tumour cells showed >5% (cytoplasmic and membranous) positivity.
Immunostaining for glypican 3 (GPC3), heat-shock protein 70 (HSP70), and glutamine synthetase and/or gene expression (GPC3, lymphatic vessel endothelial hyaluronan receptor 1 [LYVE1], and survivin) are recommended to differentiate high-grade dysplastic nodules from early HCC.
Liver regeneration- as well as liver-specific genes (hepatocyte growth factor (HGF), a-fetoprotein (AFP), albumin (ALB), glypican 3 (GPC3), tyrosine aminotransferase (TAT), hepatocyte nuclear factor 4A (HNF-4a), and cytochrome P450 1A2 (CYP1A2)) relative mRNA expression levels were determined by reverse transcription quantitative real-time PCR (RT-qPCR), by using the [2.sup.-[DELTA][DELTA]CT] method, on LightCycler[R] 480 System (Roche Diagnostics GmbH, Germany), using Maxima[R] SYBR Green/ROX kit (Thermo Fisher Scientific, DE, USA).
Glypican 3 (GPC3) and paranuclear dot-like staining for cytokeratin has been reported [14, 27].
Bagheri et al., "Familial simpson-golabibehmel syndrome: studies of X-chromosome inactivation and clinical phenotypes in two female individuals with GPC3 mutations," Clinical Genetics, vol.
Immunohistochemically, the tumor cells were positive for the enteroblastic lineage biomarkers AFP (rabbit polyclonal, 1:250; Dako, Glostrup, Denmark), GPC3 (clone 1G12, prediluted; Nichirei, Tokyo, Japan), and SALL4 (clone 6E3, 1:800; Abnova, Taipei, Taiwan) (Figures 5(a)-5(c)); they were negative for synaptophysin (clone 27G12, 1:100; Novocastra, Newcastle, UK) and HER2 (clone TAB250, 1:1; Zymed, San Francisco, CA, USA).
Glypican-3.--Glypican-3 (GPC3) is an oncofetal protein that can be detected in 70% to 80% of HCCs but not in benign hepatocellular lesions, such as hepatocellular adenoma.
Genes Tested AtP ALK APC ATM BAP1 BRCA2 BRIP1 BUB1B CDC73 CDH1 CEP57 CHEK2 CYLD DDB2 DICER1 ERCC3 ERCC4 ERCC5 EXT1 EXT2 FANCD2 FANCE FANCF FANCG FANCI GATA2 GPC3 HNF1A HOXB13 HRAS MLH1 MHS2 MSH6 MUTYH NBN PHOX2B PMS1 PMS2 PPM1D PRF1 RAD51D RBI RECQL4 RET RHBDF2 SDHC SDHD SLX4 SMAD4 SMARCA4 TP53 TSC1 TSC2 VHL WT1 BARD1 BLM BMPR1A BRCA1 CDK4 CDKN1C CDKN2A CEBPA DI53L2 EGFR EPCAM ERCC2 EZH2 FANCA FANCB FANCC FANCL FANCM FH FLCN KIT MAX MEN1 MET NF1 NF2 NSD1 PALB2 PRKAR1A PTCH1 PTEN RAD51C RUN XI SBDS SDHAF2 SDHB SMARCB1 STK11 5UFU TMEM127 WRN XPA XPC This chart shows all 98 cancer susceptible genes included in this new test.
In a phase 1 study published in 2012, two glypican-3 (GPC3) derived peptides restricted for HLA-A phenotypes induced specific CD8+ cells tumour infiltration; a peptide-specific cytotoxic T response was associated with longer OS, but only one out of 33 treated patients reached an objective response [77].
This TF also suppresses glypican 3 (GPC3) transcription [33].