Cytotoxic action of acetyl-11-keto-beta-bosweilic acid (AKBA) on meningioma cells
ABSTRACT Acetyl-11-keto-beta-boswellic acid (AKBA) is a naturally occurring pentacyclic triterpene isolated from the gum resin exudate of the tree Boswellia serrata (frankincense). Because pentacyclic triterpenes have antiproliferative and cytotoxic effects against different tumor types, we investigated whether AKBA would act in a similar fashion on primary human meningioma cell cultures. Primary cell cultures were established from surgically removed meningioma specimens. The number of viable cells in the absence/presence of AKBA was determined by the non-radioactive cell proliferation assay. The activation status of the proliferative cell marker, extracellular signal-regulated kinase-1 and -2 (Erk-1 and Erk-2) was determined by immunoblotting with the antibody that recognizes the activated form of these proteins. Treatment of meningioma cells by AKBA revealed a potent cytotoxic activity with half-maximal inhibitory concentrations in the range of 2 - 8 microM. At low micromolar concentrations, AKBA rapidly and potently inhibited the phosphorylation of Erk-1/2 and impaired the motility of meningioma cells stimulated with platelet-derived growth factor BB. The cytotoxic action of AKBA on meningioma cells may be mediated, at least in part, by the inhibition of the Erk signal transduction pathway. Because of the central role the Erk pathway plays in signal transduction and tumorigenesis, further investigation into the potential clinical use for AKBA and related boswellic acids is warranted.
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ABSTRACT: The study investigated the growth-inhibiting and apoptosis mediating effects of B. serrata extract as monotherapy and combination therapy with DOX against hepatocellular carcinoma cell lines. Boswellic acid rich fraction of B. serrata extract was prepared. MTT assay on HepG2 and Hep3B cells was carried out using B. serrata alone and in combination with DOX. Further, caspase-3 activity, TNF-α level, and IL-6 level were estimated. Isobolographic analysis was carried out to evaluate the effect of combination therapy. Additionally, protective effect of B. serrata extract on DOX induced hepatic toxicity was also evaluated in Wistar rats. B. serrata extract inhibited growth of HepG2 (IC50 value of 21.21 ± 0.92 μg/mL) as well as HepG2 (IC50 value of 18.65 ± 0.71 μg/mL). DOX inhibited growth in HepG2 and Hep3B cells with an IC50 of 1.06 ± 0.04 μg/mL and 1.92 ± 0.09 μg/mL. Isobolographic analysis showed combination index (CI) of DOX and B. serrata extract of 0.53 ± 0.03 to 0.79 ± 0.02 suggesting synergistic behavior against the two cell lines. B. serrata extract also caused dose dependent increase in caspase-3 activity, TNF-α level, and IL-6 level which was higher (P < 0.001) with DOX (1 μM) and B. serrata extract (20 μg/mL) combination. B. serrata extract also protected Wistar rats against DOX induced hepatic toxicity.BioMed Research International 08/2014; 2014. DOI:10.1155/2014/294143 · 2.71 Impact Factor
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ABSTRACT: Frankincense (Gum Olibanum), made from resins of Burseraceae family, grows in Somalia, India and Yemen. Many years ago the oldest doctors used this plant for treatment of many diseases. This study identifies frankincense impact by biochemical analysis and histological examination on rats. In this study, forty male Wister Albino rats weighing 70-100 g were maintained in clean cages. The rats were divided into 2 groups, each group contained 20 rats. Frankincense extract was prepared by heating distilled water (400 ml) to 80 °C and soaking 20 g of herbs for about 60 min. After cooking at room temperature the dose was given orally through special drinking bottles daily. The first group acted as control drinking water. The second group served as treated group and was given frankincense in the drinking water during the whole duration of the experiment. After 15 and 30 days of treatment, the rats were anesthetized with ether, and blood was collected from the livers and kidneys; some biochemical analyses were performed including aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and non-bilirubin, urea, uric acid, and creatinine. Rats were killed by cervical decapitation of livers and kidneys. Each group was divided into 2 parts. The first part was used for the determination of glutathione (GSH), glucose 6 phosphate dehydrogenase (G6PDH), xanthine oxidase (XO), malonyldealdehyde (MDA), nitric oxide (NO), and xanthine oxidase (XO). The second part of livers and kidneys was kept in formalin solution (10%) and stained by Hematoxylin and Eosin (H & E), to be used for histological examination. I demonstrated in the biochemical analysis in the serum, tissue and histological examination, different impact between group (B) and group (A), and that frankincense is not absolutely safe and that precautions must be taken during it's us as a traditional medicine and that increase the awareness with safety and health hazards of many other traditional medicine is critically needed.Saudi Journal of Biological Sciences 04/2011; 18(2):189-94. DOI:10.1016/j.sjbs.2010.10.005 · 0.74 Impact Factor
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ABSTRACT: We develop an analytical framework to quantify the effects of the spreading bandwidth on spread spectrum systems operating in dense multipath environments. The focus of the paper is to characterize the symbol error probability (SEP) performance of a RAKE receiver tracking the L strongest multipath components in frequency-selective fading. By transforming the physical RAKE receiver with correlated ordered paths into the domain of a “virtual RAKE” receiver with independent virtual paths, analytical expressions for the SEP are derived in terms of the spreading bandwidth, multipath spread of the channel and the number of combined pathsWireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE; 02/1999