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Target intelligence / Profile preview
T-box transcription factor 18 (TBX18)
- Target
- TBX18
- Molecular classification
- Transcription factor, DNA-binding protein, T-box family (specifically Tbx1 sub-family)
01
Overview
T-box transcription factor 18 (TBX18) is a DNA-binding transcription factor from the T-box family, essential for embryonic development of the vertebral column, ureter, posterior heart, and specification of mesenchymal and smooth muscle cell lineages. TBX18 functions mainly as a transcriptional repressor, forming homo- and heterodimers with other transcription factors to regulate gene expression. Mutations or dysregulation of TBX18 are linked to congenital anomalies such as CAKUT and heart defects. In cardiac cells, TBX18 suppresses Cx43 to confer pacemaker cell properties, and overexpression can reprogram cells into pacemaker-like phenotypes—a strategy under preclinical development using modified mRNA. TBX18 interacts with multiple cofactors and homeobox proteins, indicating complex regulatory networks in development and disease contexts.
- Other names
- T-box transcription factor TBX18TBX18T-box protein 18CAKUT2PUJOT-box 18
02
Mechanism of action
For gene/mRNA therapeutics: Cellular reprogramming via induction of TBX18 transcriptional activity
03
Biological functions
Embryonic development (vertebral column, ureter, heart, mesenchyme, smooth muscle cells)Transcriptional repressionRegulation of cell differentiation (e.g., coronary smooth muscle, fibroblasts, pacemaker-like cells)Interaction with transcriptional and centrosomal cofactors
04
Disease associations
Congenital anomalies of kidney and urinary tract (CAKUT)Congenital heart defectsUreteropelvic junction obstruction (PUJO)Potential role in cancer (radioresistance in esophageal squamous cell carcinoma)
05
Safety considerations
Risks of off-target development effects if modulated in gene/mRNA therapyPotential contribution to oncogenic radioresistance in some tumors
06
Biomarkers
TBX18 promoter or expression levels (for congenital heart defect or CAKUT risk monitoring)
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