OBSCN (Obscurin)

Potential tumor-suppressing properties have been revealed through OBSCN lncRNAs and epigenetic regulation. This review aims to provide a comprehensive overview of obscurin's molecular functions and interactions by discussing the effects of its differential expression and its interactions with binding partners, along with the differences and similarities between vertebrate and invertebrate obscurin.

Furthermore, machine learning models based on the OBSCN mutation-related gene signatures (OMRGS) achieve outstanding performance in prediction of response to immune checkpoint inhibitors. In summary, our findings position OBSCN as a novel molecular nexus linking genomic alterations, intratumoral microbiome dysbiosis, and immune infiltration in GC, providing a rationale for future biomarker-driven therapeutic strategies.

To date, somatic OBSCN mutations have been reported in melanoma. This first report of a germline OBSCN frameshift variant in melanoma expands the genetic landscape of melanoma predisposition and suggests that OBSCN may represent a candidate gene contributing to melanoma risk.

This study confirmed that BLCA patients with low OBSCN expression had a worse prognosis but a superior response to ICIs, providing a reference for individualised treatment of BLCA patients.

In summary, we characterized the genomic landscape of MM in diverse Chinese populations, confirmed clonal evolution, and identified prognostic genes.

Glioblastoma multiforme (GBM), a malignant neoplasm originating from glial cells, remains challenging to treat despite the current standard treatment approach that involves maximal safe surgical resection, radiotherapy, and adjuvant temozolomide chemotherapy...Also, the study identified potential drug sensitivity patterns in GBM patients with mutations in OBSCN and AHNAK2, and evaluated the impact of amino acid changes in specific protein domains on the survival of GBM patients. These findings provide important insights into the genetic alterations and somatic interactions in GBM, which could have implications for the development of new therapeutic strategies for this aggressive malignancy.

In addition, the LR group had high tumor mutation burden, FLG, and OBSCN mutations. A prognostic risk classifier for GC patients was identified and validated by carrying out a multicenter retrospective study.

CRISPR-activation of OBSCN-AS1 in triple-negative breast cancer cells effectively and specifically restores OBSCN expression and markedly suppresses cell migration, invasion, and dissemination from three-dimensional spheroids in vitro and metastasis in vivo. Collectively, these results reveal the previously unknown regulation of OBSCN by an antisense lncRNA and the metastasis suppressor function of the OBSCN-AS1/OBSCN gene pair, which may be used as prognostic biomarkers and/or therapeutic targets for metastatic breast cancer.

Mutations of CD19 exon2-4 leads to the variation on protein structure, which hindered targeted killing process of CAR-T cells and finally resulted in CD19-negative relapse. On the other hand, OBSCN and RHOH may play a role in promoting leukemia proliferation and decreasing apoptosis, and the lower expression of OBSCN and RHOH may be risk factors associated with CD19-negative relapse. In addition, lower expression of RHOH was unfavourable for the infiltration of TN, TEM, TM and TILs in tumor microenvironment, which lead to the weakening anti-tumor effect of immunocytes.