Project description:Tumor growth reduction induced by anthracycline-based chemotherapy is largely determined by an anticancer immune response that is ignited by the presentation of dead-cell antigens by intratumoral dendritic cells. In an unbiased screen designed to identify cancer therapy-relevant single nucleotide polymorphisms in genes affecting the interaction between dying tumor cells and immune cells, we identified a loss-of-function allele of the gene coding for formyl peptide receptor 1 (FPR1) that was associated with poor metastasis-free and overall survival in breast cancer patients receiving adjuvant chemotherapy. In mice, the therapeutic effects of anthracyclines were abrogated when the immune system was rendered deficient for FPR1 or when tumor cells lacked the FPR1 ligand Annexin A1 (ANXA1). Defective anticancer immune responses from FPR1 knockout mice could be attributed to the failure of dendritic cells to approach dying tumor cells and hence to present tumor cell antigens to T lymphocytes. Experiments performed in a microfluidic device confirmed the obligatory contribution of ANXA1 and FPR1 to the induction of stable conjugates between dying tumor cells and human or murine leukocytes. Altogether, these results underscore the functional and clinical importance of FPR1 in determining chemotherapy-relevant anticancer immune responses. When the surface of tumor reached 25-45 mm2 after subcutaneous tumor cell innoculation, mice received 2.9 mg/Kg intratumoral doxorubicin (DX) (in 50 μL PBS). Two days after treatment, tumor samples were harvested, rinsed briefly with cold PBS and immediately preserved in RNAlater RNA Stabilization Reagent (Qiagen) overnight at 4°C. Samples were then snap-frozen in liquid nitrogen and stored at -80°C before RNA isolation.
Project description:Tumor growth reduction induced by anthracycline-based chemotherapy is largely determined by an anticancer immune response that is ignited by the presentation of dead-cell antigens by intratumoral dendritic cells. In an unbiased screen designed to identify cancer therapy-relevant single nucleotide polymorphisms in genes affecting the interaction between dying tumor cells and immune cells, we identified a loss-of-function allele of the gene coding for formyl peptide receptor 1 (FPR1) that was associated with poor metastasis-free and overall survival in breast cancer patients receiving adjuvant chemotherapy. In mice, the therapeutic effects of anthracyclines were abrogated when the immune system was rendered deficient for FPR1 or when tumor cells lacked the FPR1 ligand Annexin A1 (ANXA1). Defective anticancer immune responses from FPR1 knockout mice could be attributed to the failure of dendritic cells to approach dying tumor cells and hence to present tumor cell antigens to T lymphocytes. Experiments performed in a microfluidic device confirmed the obligatory contribution of ANXA1 and FPR1 to the induction of stable conjugates between dying tumor cells and human or murine leukocytes. Altogether, these results underscore the functional and clinical importance of FPR1 in determining chemotherapy-relevant anticancer immune responses.
Project description:Caesalpinia sappan L. has exhibited various pharmacological effects, yet its anticancer activities against colorectal cancer (CRC) and underlying molecular mechanisms remain unclear. This study investigated the anticancer properties of an ethanol extract of C. sappan L. (CSE) against CRC cells, focusing on the identification of bioactive compounds and their mechanisms of action. A network pharmacology analysis was conducted to identify potential CRC targets and bioactive compounds of CSE, using LC-MS for compound identification. The anticancer effects of CSE were then validated through in vitro and in vivo models of CRC. The network pharmacological approach identified 87 overlapping genes between CSE targets and CRC-related genes, with protein–protein interaction analysis highlighting 33 key target genes. CSE inhibited cell proliferation in human CRC cell lines, including HCT 116, KM12SM, HT-29, and COLO 205, and induced apoptosis via caspase 3/7 activation. Western blot analyses confirmed the modulation of critical signaling pathways, including STAT3, AKT, and mitogen-activated protein kinases. Furthermore, CSE significantly suppressed tumor growth in MC38 CRC-bearing mice. These findings suggest that CSE possesses substantial potential as a natural anticancer agent for CRC treatment, highlighting the need for further exploration in therapeutic development.
Project description:Anticancer drug clustering in lung cancer based on gene expression profiles. We performed gene expression analysis in lung cancer cell lines. (used: Affymetrix GeneChip Human Genome U133 Array Set HG-U133A). We also examines the sensitivity of these cell lines to commonly used anti-cancer agents (docetaxel, paclitaxel, gemcitabine, vinorelbine, 5-FU, SN38, cisplatin, and carboplatin) via MTT assay. We related the cytoxic activity of each of these agents to corresponding expression pattern in each of the cell lines using modified NCI program. Keywords: cytotoxicity, lung cancer, anticancer drugs
Project description:A series of novel pyrazoline scaffolds from coumarin-carbazole chalcones were synthesized. We explored various acetyl, amide, and phenyl substituents at the N-1 position of the pyrazoline core. The synthesized compounds were characterized by FTIR, 1H-NMR, 13C-NMR, DEPT, and mass spectroscopic techniques. The in vitro cytotoxicity study of all the synthesized compounds was evaluated against HeLa, NCI-H520 and NRK-52E cell lines. Compounds 4a and 7b became the most active compounds and exhibited their potential to arrest the cell cycle progression and induce apoptosis in both the cell lines. In addition, molecular docking studies revealed a higher binding affinity of both the molecules with CDK2 protein. Based on the obtained results, a comprehensive analysis is warranted to establish the role of compounds 4a and 7b as promising cancer therapeutic agents.
Project description:Background: Antimalarials have anticancer potential. Results: We have systematically tested five distinct antimalaria drugs in a panel of cancer cell lines. Conclusion: Three antimalarial classes display potent antiproliferative activity, and their potency is correlated with cancer cell gene expression patterns. Significance: We confirm and extend anticancer potential of these antimalarials and we discuss their therapeutic potential based on clinical data. Key words: Malaria, Anticancer drug, Drug Discovery, Genomics, Gene Expression, Bioinformatics, Cancer AffymetrixM-BM-. HG-U133 Plus 2.0 mRNA expression arrays were used to determine the expression. CEL result files were pre-processed using the RMA (Irizarry et al, 2003) algorithm. This microarray analysis was performed for 91 cell lines.
Project description:Platinum-based metallodrugs are the most widely used anticancer agents. Their reduced effectiveness after repeat dosing (resistance) constitutes a major clinical problem. In this experiment we study a potent organo-osmium compound with improved activity over cisplatin and no cross-resistance in platinum-resistant cancers. A2780 cells were exposed to an osmium anticancer compound and to a negative control solution, in triplicate. At 0, 4, 12, 24 and 48 h, cells were collected for each condition, and whole cell RNA was extracted. Samples were purified and QC checked before Truseq library preparation and Illumina sequencing. Each sample had approximately 30 million paired-end reads. Samples were mapped to the human genome using Tophat2 and differential expression analysed using edgeR.
Project description:Background: Antimalarials have anticancer potential. Results: We have systematically tested five distinct antimalaria drugs in a panel of cancer cell lines. Conclusion: Three antimalarial classes display potent antiproliferative activity, and their potency is correlated with cancer cell gene expression patterns. Significance: We confirm and extend anticancer potential of these antimalarials and we discuss their therapeutic potential based on clinical data. Key words: Malaria, Anticancer drug, Drug Discovery, Genomics, Gene Expression, Bioinformatics, Cancer
Project description:Drug resistance, caused by complex and redundant mechanisms, is a major obstacle in cancer treatment, especially in liver and kidney cancers. Combinational therapy of miRNAs, which concurrently target multiple pathways, with anticancer drugs represent a new strategy to improve the drug response. By a systems approach, we identified that miR-27b, a miRNA deleted in liver and kidney cancers, sensitizes cancer cells to a broad spectrum of anticancer drugs in vitro and in vivo. Two samples transfected with nontarget miRNA control or miR-27b mimics followed by 48 hours doxorubicin treatment
Project description:Sorafenib, a multiple-kinase inhibitor, has been widely used as a first-line anticancer drug for advanced hepatocellular carcinoma (HCC). However, the development of drug resistance to sorafenib is frequently observed in clinical applications. Potential non-kinase targets of sorafenib have not been well documented and may provide insights into reversing drug resistance. Herein, we report that sorafenib exerted its anticancer effects by activating metallothionein 1G (MT1G) expression. MT1G served as a novel marker in HCC and correlated well with patient survival. MT1G overexpression suppressed the cellular proliferation, migration, invasion, and tumor formation of HCC, and sensitized cells to sorafenib treatment. However, the disruption of MT1G attenuated sorafenib’s anticancer effects. Mechanistically, sorafenib upregulated MT1G expression via hypomethylation of its promoter region by binding and inhibiting DNA methyltransferase 1 (DNMT1) and increasing its promoter accessibility in HCC cells. The activation of MT1G also inhibited CA9 transcription through the degradation of HIF1a as mediated by KLF4. Our collective data revealed that sorafenib exerted its anticancer effects through epigenetic regulation of the DNMT1/MT1G/KLF4/CA9 axis in HCC, and that the activation of MT1G might constitute a strategy for reversing sorafenib resistance.