Search

Three new dinuclear Co(II) complexes [Co2(L1)2Cl2](PF6)2 (1), [Co2L2(OAc)2(CH3OH)4](ClO4)2 (2), and [Co2L3(OAc)2(CH3OH)4](ClO4)2 (3) were synthesized and structurally determined by X‐ray single‐crystal diffraction analysis as well as IR, elemental analysis, and mass spectrometry. All complexes exhibit efficiently self‐activated cleavage activity with hydrolytic mechanism, which was accurately proved by addition of regular radical scavengers, anaerobic cleavage experiment, and 2‐thiobarbituric acid reaction. Complex 1 exhibited higher selective cytotoxicity against tumor cells than normal cells, which is significantly better than that of cisplatin. Hoechst 33342 staining, intracellular ROS generation and mitochondrial membrane potential were conducted to assess the apoptosis‐inducing activity of 1. The effect of complex 1 on cell invasion was observed by Transwell assay and angiogenesis experiment, and the results demonstrated that 1 could inhibit the cell invasion and angiogenesis. [ABSTRACT FROM AUTHOR]

Background: Cisplatin (CIS) is widely used to treat various cancers but can cause ototoxicity and sensory hair cell loss in the inner ear. Copper induces an excessive production of reactive oxygen species (ROS) in hair cells, leading to the development of various antioxidants. Methods and results: This study aimed to evaluate the potential antioxidant properties of curcumin (CUR) in the inner ear organ of corti-1 cells (OC1) and animal models (zebrafish and guinea pigs). Graphene oxide quantum dots (GOQDs) enabled CUR to penetrate the round window membrane (RWM) and maintain the concentration in the perilymph after inner ear administration. The results showed that CUR/GOQDs had favorable biocompatibility and strongly affected ROS generation induced by CIS in OC1 cells. DCFHDA Green staining demonstrated that CUR/GOQDs successfully reversed the decrease in mitochondrial membrane potential induced by CIS in vitro and rescued cells from early cuproptosis, which was confirmed by FDX1 staining. Additionally, the experiment found that CUR decreased the expression of cuproptosis proteins (FDX1, LIAS, and LIPT1) and increased the expression of the Bcl-2 protein. Conclusion: The results demonstrate that CUR/GOQDs is a promising therapeutic agent that can prevent CIS-induced ototoxicity by blocking the cuproptosis signal pathway., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Hu, Zhang, Yang, Qiao, Lu and Yu.)

Objective: Heat shock protein A2 has been reported to be tightly associated with tumorigenesis and tumor progression. This study aimed to determine the oncogenic and immunological roles of Heat shock protein A2 in pancreatic cancer by bioinformatics., Methods: Expression of Heat shock protein A2 in tumorous and normal specimens of pancreatic cancer was analyzed using the Cancer Genome Atlas and the Cancer Genome Atlas + Genotype-Tissue Expression data sets, respectively. Relationships of Heat shock protein A2 expression with immune infiltrates in pancreatic cancer were assessed. Heat shock protein A2-associated coexpressed genes in pancreatic cancer were obtained, followed by the implementation of enrichment analysis., Results: The data demonstrated that Heat shock protein A2 was significantly overexpressed in tumorous samples compared with normal samples. Heat shock protein A2 expression was remarkably positively interrelated with CD8+ T cell, neutrophil, dendritic cell, and macrophage, but not with CD4+ T and B cells. Heat shock protein A2 expression was markedly positively relevant to both cancer-associated fibroblast and endothelial cell. Enrichment data revealed that Heat shock protein A2 was intimately involved in the tumorigenesis and progression of pancreatic cancer., Conclusion: Heat shock protein A2 is upregulated in pancreatic cancer and is closely associated with tumor immunity and aggressive progression.

Lymph node metastasis (LNM) is associated with poor survival in patients with Head and Neck cancer (HNC). Aryl hydrocarbon receptor repressor (AHRR) is thought to be responsible for increased lymphangiogenesis and LNM. AHRR and endothelial PAS domain-containing protein 1 (EPAS1) are basic helix-loop-helix/per-arnt-sim family transcription factors, however, its central role in lymphangiogenesis remains to be explored. In this study, we explored that EPAS1 dimerizes with HIF-1β during lymphangiogenes and tumor growth, inducing expression of many genes, including vascular endothelial growth factor-d (VEGFD). AHRR wild-type ( Ahrr +/+ ) transgenic carcinoma of the mice develop tumors with greater frequency than AHRR-null ( Ahrr -/- ) mice, even though prevalence of squamous epithelial hyperplasia is not inhibited. Hypoxia induced VEGFD protein in a genotype-dependent fashion in Ahrr +/+ , Ahrr +/- and Ahrr -/- HNC. However, hypoxia induced upstream proteins in the phosphatidylinositol 3-kinase-signaling cascade to a similar extent in HNC of each Ahrr genotype, evidenced by Akt phosphorylation. These findings suggest that AHRR induces HIF-1β expression, increasing interaction with EPAS1 enhancing VEGFD production and lymphangiogenesis in HNC., Competing Interests: None., (AJCR Copyright © 2022.)

Background: Heat shock protein A2 (HSPA2) is known to relate to the pathogenesis and progress of cancer. This study aimed to investigate the connection between HSPA2 and early postsurgical relapse of pancreatic cancer (PC)., Methods: Expression of HSPA2 in 85 pairs of cancerous and matched noncancerous samples was determined by immunostaining method. The relationship between HSPA2 expression and early postsurgical recurrence was assessed using logistic regression. The performance and potential application of HSPA2 expression to predict early postsurgical recurrence was evaluated by receiver operating characteristic (ROC) curve analysis and decision curve analysis (DCA)., Results: HSPA2 expression in tumor specimens was markedly elevated compared with non-tumor specimens. Logistic regression analysis indicated that HSPA2 upregulation was an independent risk marker for early postsurgical recurrence of PC. ROC curve analysis and DCA demonstrated that both the area under the curve (AUC) and the net benefit of HSPA2 expression were higher than those of other clinicopathologic features in predicting early postsurgical relapse of PC. The combination of HSPA2 expression with other malignant clinicopathologic characteristics had greater AUC and net benefit relative to them alone in predicting early postsurgical recurrence., Conclusions: Upregulated HSPA2 independently predicts early postsurgical recurrence of PC and has superior predictive performance and potential application value when combined with malignant clinicopathologic features. Our findings reveal that HSPA2 is a promising predictor for early postoperative relapse of PC., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://dx.doi.org/10.21037/gs-21-262). The authors have no conflicts of interest to declare., (2021 Gland Surgery. All rights reserved.)