HOTAIR was initially characterized as an epigenetic scaffold that recruits polycomb repressive complex 2, or PRC2, and lysine-specific demethylase 1, or LSD1. The review treats that recruitment model as an important starting point but highlights a broader regulatory architecture. HOTAIR interacts with chromatin-modifying complexes, RNA-binding proteins and post-transcriptional regulatory networks, allowing its activity to connect multiple cellular processes. The resulting function depends on the molecular context in which HOTAIR operates, challenging the idea that it has one uniform effect across cancers.

Evidence summarized in the review connects HOTAIR with tumor adaptation, metastasis, epithelial–mesenchymal transition, metabolic regulation and therapeutic resistance. These reported associations support the characterization of HOTAIR as a regulatory hub involved in both tumor progression and responses to anticancer treatment. However, the review is a synthesis of evidence rather than a new clinical study, and it does not establish that HOTAIR alone causes each of these outcomes. Differences among tumor lineages and cellular conditions may influence whether HOTAIR promotes progression, changes cellular states or contributes to treatment survival.

Potential diagnostic and therapeutic applications remain limited by several unresolved issues. The review identifies tumor heterogeneity, insufficient clinical validation, delivery limitations for HOTAIR-targeting agents and potential off-target effects as barriers to translation. Precise patient selection is also needed because activity observed in one tumor context may not translate to another. Current approaches for detecting HOTAIR may have clinical relevance, but the available evidence does not yet establish a reliable diagnostic or treatment-selection role. The authors conclude that progress will require molecular profiling, functional characterization and clinical evaluation to determine the value of HOTAIR-based strategies and identify the settings in which they may be most useful.

Subject of Research: Context-dependent regulatory roles of the HOTAIR long non-coding RNA in cancer

Article Title: HOTAIR in cancer: a context-dependent regulatory platform linking molecular mechanisms, tumor progression, and clinical translation

Article References: Shi, Q., Gao, C., & Xue, C. (2026). HOTAIR in cancer: a context-dependent regulatory platform linking molecular mechanisms, tumor progression, and clinical translation. Molecular Biology Reports, 53(1), Article 1775. https://doi.org/10.1007/s11033-026-12973-7

Image Credits: AI Generated

DOI: 10.1007/s11033-026-12973-7

Keywords: HOTAIR, long non-coding RNA, cancer regulation, chromatin remodeling, tumor progression, metastasis, metabolic adaptation, drug resistance, cancer biomarkers, translational oncology, cancer, context-dependent