Project description:Purpose: To understand the underlying mechanisms of oncolytic virus therapy in breast cancer. Methods: The primary tumors of 4T1 in BALB/C mice were exstracted and analyzed by RNA-seq. Results: In consistent with previous studies, we found some anti-tumor factors were up-regulated. Interestingly, several immunosupressive genes were activited. Conclusion: Our study identified the intercellular and intracellular factors restricting the optimized oHSV efficacy and supported the rationally designed triple therapy for clinical translation.
Project description:Purpose: To understand the underlying mechanisms of oncolytic virus therapy in breast cancer. Methods: The primary tumors of 4T1 in BALB/C mice were extracted and analyzed by RNA-seq. Results: In consistent with previous studies, we found some anti-tumor factors were up-regulated. Interestingly, several immunosupressive genes were activited. Conclusion: Our study identified the intercellular and intercellular factors restricting the optimized oHSV efficacy and supported the rationally designed triple therapy for clinical translation.
Project description:Triple-Negative Breast Cancer (TNBC) is known for its high recurrence and metastasis rates, posing treatment difficulties and a poor prognosis post-metastasis. Exosomes, linked to metastasis and immune evasion, could be early biomarkers for tumor spread. This study seeks to identify and preliminarily validate serum markers for diagnosing TNBC metastasis using high-throughput sequencing.
Project description:Triple-negative breast cancer (TNBC) is aggressive, resistant to chemotherapy, and prone to recurrence. While PARP inhibitors (PARPi) help some patients, most do not respond. We developed a novel therapy combining mitochondria-targeted luminoptogenetics (cmLumiOpto) with PARPi to enhance treatment. Delivered via an anti-CD276 monoclonal antibody-conjugated exosome-AAV (mAb-Exo-AAV), cmLumiOpto disrupts mitochondrial membrane potential, inducing cancer cell death. In vitro, the combination increased cytotoxicity; in vivo, it reduced tumor burden by 95–100%, suppressed xenograft growth, and blocked metastasis in TNBC models. Mechanistic studies showed mitochondrial depolarization, DNA damage, cytokine release, and immune infiltration, highlighting a promising strategy for TNBC therapy. The mechanism of action was further explained through bulk RNA sequencing post-treatment. These findings highlight the therapeutic potential of our cmLumiOpto gene therapy for treatment of triple negative breast cancers.
Project description:This microarray dataset contains 51 triple-negative breast cancers with clinical and recurrence information for at least 3 years of follow-up and 106 luminal breast cancers (reanalyzed data from Series GSE24124, GSE9309, and GSE17040). A novel set of 45-gene signature that was statistically predictive of distant metastasis recurrence for triple-negative breast cancer was identified in this study.
Project description:Aberrant SMAD3 activation has been implicated as a driving event in cancer metastasis. However, the drivers of SMAD3 activation are poorly defined. Here, we identify SMAD3 as a non-histone substrate of lysine acetyltransferase 6A (KAT6A). The acetylation of SMAD3 at K20 and K117 by KAT6A with promotes SMAD3 association with oncogenic H3K23ac reader TRIM24 and upregulation of immune response-related cytokines. This event in turn leads to enhanced myeloid-derived suppressor cell (MDSC) recruitment and triple-negative breast cancer (TNBC) metastasis. Inhibiting KAT6A in combination with anti-PD-L1 therapy in treating breast cancer xenograft-bearing animals markedly attenuates TNBC metastasis and provides a significant survival benefit. Thus, our work presents an KAT6A acetylation-dependent regulatory mechanism governing SMAD3 oncogenic function and provides insight into how targeting an epigenetic factor with immunotherapies enhances the anti-metastasis efficacy.
Project description:Triple-negative breast cancer (TNBC) has a relatively aggressive biological behavior and poor outcome. Our published study showed that PAI-1 could induce the migration and metastasis of TNBC cells. However, the underlying mechanism by which PAI-1 regulates TNBC metastasis has not been addressed. Using microarray analysis of lncRNA expression profiles, we identified a lncRNA SOX2-OT, which is by induced by PAI-1 and could function as an oncogenic lncRNA in TNBC.