Frankincense oil appears to distinguish cancerous from normal bladder cells and suppress cancer cell viability. Microarray and bioinformatics analysis proposed multiple pathways that can be activated by frankincense oil to induce bladder cancer cell death. Frankincense oil might represent an alternative intravesical agent for bladder cancer treatment.

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The aim of this study was to evaluate the effect of the gum methanol extract of Boswellia thurifera on the viability and P53 gene expression of cultured breast cancer cells.

The results of the current study show that gum methanol extract of Boswellia thurifera has probably anti-cancer effects and could induce P53 gene transcription and toxicity in the cultured breast cancer cell line. The increase of P53 gene specific mRNA may be a mechanism of gum methanol extract induced cytotoxicity. However, for a definitive conclusion, further studies on other cell lines as well as animal models and subsequent clinical studies are warranted.

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All fractions of frankincense essential oil from Boswellia sacra are capable of suppressing viability and inducing apoptosis of a panel of human pancreatic cancer cell lines. Potency of essential oil-suppressed tumor cell viability may be associated with the greater abundance of high molecular weight compounds in Fractions III and IV. Although chemical component(s) responsible for tumor cell cytotoxicity remains undefined, crude essential oil prepared from hydrodistillation of Boswellia sacra gum resins might be a useful alternative therapeutic agent for treating patients with pancreatic adenocarcinoma, an aggressive cancer with poor prognosis.

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Apoptosis - Boswellia sacra essential oil was prepared from Omani Hougari grade resins through hydrodistillation at 78 or 100 ^oC for 12 hours. Chemical compositions were identified by gas chromatography-mass spectrometry; and total boswellic acids contents were quantified by high-performance liquid chromatography.

Similar to our previous observations in human bladder cancer cells, Boswellia sacra essential oil induces breast cancer cell-specific cytotoxicity. Suppression of cellular network formation and disruption of spheroid development of breast cancer cells by Boswellia sacra essential oil suggest that the essential oil may be effective for advanced breast cancer. Consistently, the essential oil represses signaling pathways and cell cycle regulators that have been proposed as therapeutic targets for breast cancer. Future pre-clinical and clinical studies are urgently needed to evaluate the safety and efficacy of Boswellia sacra essential oil as a therapeutic agent for treating breast cancer.

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Recent studies have found that triterpene acid type compounds has many effects including antiinflammatory, regulating blood sugar level, antiviral and antitumor activity. More importantly, triterpene acid type compounds has become one of the most popular topics recently because its selective toxic effects on cancer cells and harmless to normal cells at the same time. This review summarized the antitumor activity and the mechanism of triterpene acid type compounds, providing guideline for further research and development of new antitumor natural products.

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Anti-Inflammatory - Boswellic acids are the main well-known active components of the resin of Boswellia carteri (Burseraceae) and these are still dealing with the ethnomedicinal use for the treatment of rheumatoid arthritis and other inflammatory diseases.

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Anti-Proliferative - Aromatic gum from Boswellia carteri (olibanum oleogum) has long been used in Egyptian traditional medicine.

This is the first report of COX-1 and -2 enzyme and tumor cell proliferation inhibitory effects of compounds 1 and 2.

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3-Oxo-tirucall-8, 24-dien-3-one-21-oic acid is a minor natural product isolated from Boswellia serrata gum apart from β-boswellic acids.

While naturally occurring 3-oxo-tirucallic acid (1) and its methyl ester (2) exhibited nearly the same antiproliferative activity, A-ring modified molecules displayed improved anti-tumor activity with methyl A-homo-4-aza-3-oxo-tirucall-8, 24, dien-3-one-21-oate (4) exhibiting significant effect against prostate cancer cell lines.

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