GPC3

Chr XXLR

glypican 3

Also known as: DGSX, GTR2-2, MXR7, OCI-5, SDYS, SGB, SGBS, SGBS1

Cell surface heparan sulfate proteoglycans are composed of a membrane-associated protein core substituted with a variable number of heparan sulfate chains. Members of the glypican-related integral membrane proteoglycan family (GRIPS) contain a core protein anchored to the cytoplasmic membrane via a glycosyl phosphatidylinositol linkage. These proteins may play a role in the control of cell division and growth regulation. The protein encoded by this gene can bind to and inhibit the dipeptidyl peptidase activity of CD26, and it can induce apoptosis in certain cell types. Deletion mutations in this gene are associated with Simpson-Golabi-Behmel syndrome, also known as Simpson dysmorphia syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

GeneReviewsOMIMResearchGenerating clinical summary…

Primary Disease Associations & Inheritance

Simpson-Golabi-Behmel syndrome, type 1MIM #312870
XLR
Wilms tumor, somaticMIM #194070

Clinical highlights

Gene-disease validity (ClinGen)
Simpson-Golabi-Behmel syndrome · XLDefinitivesufficient evidence for diagnostic panels
Interpreting a novel variant
Loss of function is the curated mechanism (Gene2Phenotype) and the gene is intolerant of it in the population — truncating, frameshift and canonical splice variants carry more prior weight here than missense.Curated gene-level mechanism — a prior for triage, not a per-variant call.
12
Active trials
243
Pubs (1 yr)
P/LP submissions
P/LP missense
0.16
LOEUF· LoF intol.
LOF
Mechanism· G2P
📖
GeneReview available — GPC3
Authoritative clinical overview · Recommended first read
Open GeneReview ↗

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

LoF intolerant — likely haploinsufficient
LoF Constraint?
0.16LOEUF
pLI 0.998
Z-score 3.98
OE 0.00 (0.000.16)
Highly constrained

Highly LoF-intolerant (top ~10% of genes)

Missense Constraint?
1.45Z-score
OE missense 0.73 (0.640.83)
161 obs / 221.9 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios?
LoF OE?0.00 (0.000.16)
00.351.4
Missense OE?0.73 (0.640.83)
00.61.4
Synonymous OE?0.99
01.21.6
LoF obs/exp: 0 / 18.4Missense obs/exp: 161 / 221.9Syn Z: 0.04

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

GPC3 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

Hepatocellular CarcinomaImmunotherapyCAR

GPC3-CAR-T Cells for Immunotherapy of Cancer With GPC3 Expression

RECRUITING
NCT03198546Phase PHASE1Second Affiliated Hospital of Guangzhou Medical UniversityStarted 2017-07-01
GPC3 and/or TGFβ targeting CAR-T cells
Solid Tumor (Excluding CNS)Hepatocellular CarcinomaLiver Cell Carcinoma

Cytokine Armored GPC3 Specific Chimeric Antigen Receptor Expressing T-cells in Adults With Solid Tumors

NOT YET RECRUITING
NCT07224568Phase PHASE1Seattle Children's HospitalStarted 2026-04-01
SC-CAR.GPC3xIL15.21 CAR T cells
Liver Cell CarcinomaSolid TumorWilms Tumor

Interleukin-15 Armored Glypican 3-specific Chimeric Antigen Receptor Expressed in Autologous T Cells for Solid Tumors

ACTIVE NOT RECRUITING
NCT05103631Phase PHASE1Baylor College of MedicineStarted 2021-06-17
CATCH T cells
Liver CancerLung CancerBreast Cancer

Engineered TILs/CAR-TILs to Treat Advanced Solid Tumors

RECRUITING
NCT04842812Phase PHASE1Second Affiliated Hospital of Guangzhou Medical UniversityStarted 2021-01-01
TILs and CAR-TILs targeting HER2, Mesothelin, PSCA, MUC1, Lewis-Y, GPC3, AXL, EGFR, Claudin18.2/6, ROR1, GD1, or B7-H3
HepatoblastomaHepatocellular CarcinomaWilms Tumor

Immunotherapy For Adults With GPC3-Positive Solid Tumors Using IL-15 and IL-21 Armored GPC3-CAR T Cells

RECRUITING
NCT06198296Phase PHASE1Baylor College of MedicineStarted 2025-06-10
21.15.GPC3-CAR T cells
Glioblastoma Multiforme of Brain

GPC-3 CAR T CELLS FOR Recurrent GPC-3 Positive Glioblastoma

RECRUITING
NCT06815432Phase PHASE1Baylor College of MedicineStarted 2025-10-10
15.GPC3-CAR T cells
Liver CancerRhabdomyosarcomaMalignant Rhabdoid Tumor

Interleukin-15 Armored Glypican 3-specific Chimeric Antigen Receptor Expressed in T Cells for Pediatric Solid Tumors

ACTIVE NOT RECRUITING
NCT04377932Phase PHASE1Baylor College of MedicineStarted 2021-08-08
AGAR T cells
Solid Tumor (Excluding CNS)Liver Cell CarcinomaMalignant Rhabdoid Tumor

Immunotherapy for Solid Tumor Malignancies in Pediatrics Using Interleukin-15 and -21 Armored Glypican-3-specific Chimeric Antigen Receptor T Cells

RECRUITING
NCT07148050Phase PHASE1Seattle Children's HospitalStarted 2025-12-22
SC-CAR.GPC3xIL15.21 CAR T cells
Liver Cancer

Glypican 3-specific Chimeric Antigen Receptor Expressed in T Cells for Patients With Pediatric Solid Tumors (GAP)

ACTIVE NOT RECRUITING
NCT02932956Phase PHASE1Baylor College of MedicineStarted 2018-12-17
GAP T cellsCytoxanFludara
Liver CancerRhabdomyosarcomaMalignant Rhabdoid Tumor

Interleukin-15 and -21 Armored Glypican-3-specific Chimeric Antigen Receptor Expressed in T Cells for Pediatric Solid Tumors

RECRUITING
NCT04715191Phase PHASE1Baylor College of MedicineStarted 2024-05-24
CARE T cells
Hepatocellular CarcinomaHepatocellular CancerMetastatic Hepatocellular Carcinoma

GPC3 Targeted CAR-T Cell Therapy in Advanced GPC3 Expressing Solid Tumor Malignancies

RECRUITING
NCT05003895Phase PHASE1National Cancer Institute (NCI)Started 2021-12-08
CyclophosphamideCAR-T cellFludarabine
Hepatocellular Carcinoma (HCC)

A Phase I Study of ERY974 in Patients With Hepatocellular Carcinoma

ACTIVE NOT RECRUITING
NCT05022927Phase PHASE1Chugai PharmaceuticalStarted 2021-06-01
ERY974TocilicumabAtezolizumab