COL23A1 as a Radioligand Therapy Target
COL23A1, collagen type XXIII alpha 1 chain, is a cell-surface protein. In Human Protein Atlas immunohistochemistry, COL23A1 staining is highest in glioma (100% of samples positive), head and neck cancer (100% of samples positive) and neuroendocrine tumors (100% of samples positive). Clinical status: Discovery-stage (no clinical drug program).
Is COL23A1 a good radioligand therapy target?
Scored against the six criteria that decide whether a protein can become a radioligand therapy:
- ✅ Cell-surface accessibility: Localized to the cell surface, so a radioligand can reach it from circulation.
- ✅ Tumor expression: High IHC staining in glioma, 100% of samples positive.
- ❔ Internalization: Not yet assessed.
- ⚠️ Clinical precedent: Discovery-stage (no clinical drug program)
- ❔ Shedding: Not yet assessed.
- ❔ Normal-tissue dosimetry: Check kidney, liver, bone marrow and salivary expression in the Human Protein Atlas tissue atlas.
COL23A1 expression in cancer
Protein expression of COL23A1 across 20 cancer types from Human Protein Atlas immunohistochemistry. The score is a weighted staining intensity from 0 to 1; "% positive" is the share of patient samples with detectable staining.
| Cancer type | IHC score | Level | % positive |
|---|---|---|---|
| Glioma | 0.81 | High | 100% |
| Head and Neck Cancer | 0.75 | High | 100% |
| Neuroendocrine Tumors | 0.75 | High | 100% |
| Gastric Cancer | 0.72 | High | 100% |
| Skin Cancer | 0.67 | High | 100% |
| Thyroid Cancer | 0.67 | High | 100% |
| Cervical Cancer | 0.67 | High | 100% |
| Colorectal Cancer | 0.67 | High | 89% |
| Ovarian Cancer | 0.64 | High | 100% |
| Melanoma | 0.64 | High | 92% |
| Breast Cancer | 0.64 | High | 100% |
| Testicular Cancer | 0.64 | High | 100% |
| Pancreatic Cancer | 0.63 | High | 90% |
| Lung Cancer | 0.61 | High | 92% |
| Prostate Cancer | 0.61 | High | 91% |
| Bladder Cancer | 0.58 | High | 92% |
| Endometrial Cancer | 0.57 | High | 90% |
| Kidney Cancer | 0.56 | High | 83% |
| Lymphoma | 0.50 | Medium | 83% |
| Liver Cancer | 0.39 | Medium | 64% |
Is COL23A1 internalized?
Nuclens has not yet extracted internalization evidence for COL23A1. Internalization matters for radioligands because an internalizing receptor traps the radionuclide inside the tumor cell. Run a full analysis to pull the latest literature.
COL23A1 clinical trials
Discovery-stage (no clinical drug program). Nuclens hasn't indexed trials for COL23A1 yet. Search ClinicalTrials.gov for COL23A1 trials.
COL23A1 normal tissue expression
Normal-tissue expression in dose-limiting organs (kidney, liver, bone marrow, salivary glands) drives radioligand dosimetry risk. Nuclens is re-validating its normal-tissue values, so they are not shown here yet. See COL23A1 in the Human Protein Atlas tissue atlas, and read how normal-tissue expression predicts radioligand dosimetry risk.
COL23A1 gene essentiality (DepMap)
CRISPR knockout effect across 1247 cancer cell lines: 0.06 (not essential). Radioligands kill by radiation, not by blocking the target, so essentiality matters less than for inhibitors. A non-essential target can still be an excellent radioligand target.
Related glioma radioligand targets
EGFR · HER3 (ERBB3) · c-MET (MET) · ITGAV · B7-H3 (CD276) · SSTR2 · STEAP2 · FAP
See all radioligand therapy targets in glioma.
See how COL23A1 ranks against 15,000 targets for your indication.
Run a free analysisData sources
Subcellular localization: UniProt via Open Targets (CC BY 4.0 / CC0). Tumor immunohistochemistry: Human Protein Atlas (CC BY-SA 4.0). Clinical trials: ClinicalTrials.gov (public domain). Gene essentiality: DepMap (CC BY 4.0). Internalization and shedding: AI-extracted from PubMed abstracts, so verify against the cited papers before relying on them. Nuclens is a first-pass triage layer, not a substitute for wet-lab validation or clinical dosimetry. Derived expression data on this page is shared under CC BY-SA 4.0.