Homeobox containing 1 (HMBOX1)

Homeobox containing 1 (HMBOX1) is a transcription factor and telomere repeat-binding protein encoded by the HMBOX1 gene. It is not known as a receptor, enzyme, or established therapeutic target, but as a DNA-binding protein, it regulates gene expression, particularly in the context of telomere maintenance and chromatin organization[2][3][5]. HMBOX1 is widely expressed in normal tissues with uneven levels, showing particularly high expression in brain, adrenal gland, testis, and skin[2]. It plays diverse biological roles including transcriptional repression, modulation of cell differentiation, regulation of inflammation, apoptosis, and autophagy, and functions as a positive regulator of telomere length[2][3][5]. Experimental evidence suggests a context-dependent role in cancer biology, where HMBOX1 expression can promote or suppress tumor development depending on the cellular environment[2]. No drugs are known to directly target HMBOX1, and its main mechanisms of action involve DNA and telomeric chromatin binding, impacting transcription and telomere homeostasis[2][3][5].

Other names

Homeobox telomere-binding protein 1HOT1