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Inhibition of osteosarcoma progression by sporoderm-removed ganoderma lucidum spores

ABSTRACT: Osteosarcoma (OS) is a severe malignancy affecting children and adolescents, with limited effective treatments leading to poor outcomes. This study explored the potential of sporoderm-removed Ganoderma lucidum spores (RGLS) as a novel therapeutic agent against OS and elucidated its mechanism of action. Our in vivo and in vitro experiments showed that RGLS significantly inhibited S-180 OS cell proliferation, colony formation, and migration, while simultaneously inducing apoptosis. Multi-omics analysis revealed that RGLS disrupted glycerophospholipid metabolism by upregulating lysophosphatidylcholine (LysoPC) levels through phospholipase A2 (PLA2)-mediated pathways. Co-culture assays further demonstrated that RGLS promoted the endocytosis of macrophage-derived Pla2g7 protein into S-180 cells, enhancing its anti-cancer effects. Additionally, RGLS modulated the cellular fatty acid profile and suppressed the β-oxidation of long-chain fatty acids, leading to energy depletion in OS cells. These findings provide a novel view of the multi-targeted mechanisms of RGLS, positioning it as a promising candidate for OS therapy.

ORGANISM(S): Mus Musculus

SUBMITTER: Jihong Yang

PROVIDER: PXD056264 | iProX | Wed Sep 25 00:00:00 BST 2024

REPOSITORIES: iProX

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Project description:Background: Osteosarcoma (OS) tumors and derived cell lines are characterized by complex chromosomal abnormalities. The availability of molecular genome profiling techniques such as array CGH have markedly enabled the high-resolution genome analysis of tumor genomes, as well as helped elucidate the mechanisms leading to their complexity. The identification of tumor-specific genomic profiles is currently the focus of many array CGH studies, but there have been no analyses to date documenting the genomic signatures consistent with chromosomal instability mechanisms in OS. Results: In this study we utilized high-resolution oligonucleotide array CGH to interrogate recurrent signatures of genomic imbalance in 10 OS tumors that were consistent with the breakage fusion bridge(BFB) mechanism. Comparative analysis of the tumors showed that they exhibited varying levels of genomic imbalance. The analysis also highlighted three chromosomal regions (6p21 ~ p22, 8q24 and 17p11.2 ~ p12) that were consistently involved in high level gain or amplification events. These three regions have been previously shown by us to be not only involved in high-level imbalance in OS-derived cell lines, but also to exhibit similar imbalance profiles consistent with BFB-related events. Karyotype and dual-color FISH analysis showed that repeated rearrangements of these unstable chromosomes through BFB cycles may create a heterogeneous pattern of copy number alterations. Conclusions: This genome-wide analysis is the first to utilize oligonucleotide array CGH and FISH analysis to derive possible genomic signatures of chromosomal instability in OS tumors. Perpetuation of the BFB cycle will create a heterogeneous pattern of copy number alterations by repeated rearrangement of the unstable tumor genome., thereby generating diverse phenotypes The resulting phenotypic diversity can generate tumors with a propensity for an aggressive disease course. A better understanding of the underlying mechanisms events leading to tumor development could result in the identification of prognostic markers and therapeutic targets. Experiment Overall Design: 10 OS tumor samples were used; fluor-flip was performed with normal human DNA as control

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Inhibition of osteosarcoma progression by sporoderm-removed ganoderma lucidum spores

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