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Homeobox protein Hox-B5 (HOXB5)
- Target
- HOXB5
- Molecular classification
- Transcription factor, Homeobox protein
01
Overview
Homeobox protein Hox-B5 (HOXB5) is a sequence-specific transcription factor encoded by the HOXB5 gene located in the homeobox B gene cluster on chromosome 17. It is a member of the Antennapedia (Antp) homeobox family, characterized by a conserved DNA-binding homeobox domain. HOXB5 regulates gene expression in embryonic development, with key roles in lung and gut formation and cell lineage specification. In adults, it marks long-term hematopoietic stem cells and contributes to stem cell identity. Aberrant expression of HOXB5 is associated with several human diseases, notably acute myeloid leukemia and multiple solid tumors, where it can drive proliferation, invasion, and epithelial–mesenchymal transition. It also serves as a prognostic biomarker in certain cancers and is implicated in rare congenital malformations of the lung and gut[1][3][5].
- Other names
- HOX2AHHO.C10HOX2HU-1Hox2.1homeobox protein Hox-2Ahomeobox protein Hu-1
02
Biological functions
Regulation of transcriptionEmbryonic developmentCell differentiationRegulation of cell migrationMaintenance of adult stem cell identityEndothelial differentiationAngioblast formation
03
Disease associations
Cancer (including acute myeloid leukemia, breast cancer, gastric cancer, non-small cell lung cancer, bladder cancer)Congenital lung and gut developmental disorders (e.g., bronchopulmonary sequestration, congenital cystic adenomatoid malformation)Early-onset obesity (genetic association)
04
Safety considerations
Therapeutic targeting may risk disruption of embryonic development and stem cell maintenance due to critical developmental roles
05
Biomarkers
Biomarker for distinct subsets of acute myeloid leukemiaMarker for long-term hematopoietic stem cellsPrognostic indicator in various cancers (e.g., predicts poor prognosis in breast cancer, aggressive bladder cancer)
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