{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n H2BC18 is a replication‐dependent histone H2B family member that plays a central role in organizing DNA into nucleosomes and thereby governs chromatin structure, gene transcription, and genomic stability. Dysregulation of H2B family members—including altered expression, epigenetic modifications, and changes in mRNA processing—has been repeatedly linked to various pathological states. For instance, studies in prostate and lung cancers have demonstrated that aberrant DNA methylation and upregulation of clustered H2B genes correlate with tumor progression and poor patient prognosis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " In colorectal carcinoma, increased expression of certain H2B variants reinforces cancer stem cell features and enhances malignant potential through the activation of signaling pathways such as Notch."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": " Similarly, modulation of H2B family proteins has been implicated in the response to novel targeted therapies in aggressive cancers"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": ", and variations in the expression of these genes have also been observed in proteomic profiling studies distinguishing phenotypes in model organisms."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": " Moreover, research on histone gene processing revealed that under certain conditions replication-dependent H2B genes can produce alternatively polyadenylated transcripts that are actively translated, suggesting regulation at both the epigenetic and post-transcriptional levels."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": " Finally, incomplete reprogramming of histone clusters, as observed in somatic cell nuclear transfer embryos, reinforces the importance of proper H2B gene regulation for developmental and cellular fidelity."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n Collectively, these findings underscore that H2BC18 and its related H2B family members are not only structural components vital for nucleosome formation but also serve as dynamic regulators of gene expression. Their alterations in diverse disease models highlight potential roles as biomarkers and therapeutic targets, warranting further investigation into their mechanistic contributions to oncogenesis, developmental reprogramming, and chromatin remodeling.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Gunter Weiss, Susan Cottrell, Jürgen Distler, et al. 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