Natural cancer bullets A - Z continued:
Source: Ginger Root
Antitumor effect of β-elemene in non-small-cell lung cancer cells is mediated via induction of cell cycle arrest and apoptotic cell death
“ Beta-elemene is a novel anticancer drug, which was extracted from the ginger plant. However, the mechanism of action of beta-elemene in non-small-cell lung cancer (NSCLC) remains unknown. Here we show that beta-elemene had differential inhibitory effects on cell growth between NSCLC cell lines and lung fibroblast and bronchial epithelial cell lines. ...These data indicate that the effect of beta-elemene on lung cancer cell death may be through a mitochondrial release of the cytochrome c-mediated apoptotic pathway.
Elemene displays anti-cancer ability on laryngeal cancer cells in vitro and in vivo
“ Elemene inhibited the growth of HEp-2 cells in vitro in a dose- and time-dependent manner with an IC50 of 346.5 μM (24 h incubation). Increased apoptosis was observed in elemene-administered cells. Elemene is suspected to enhance caspase-3 activity, and thus inhibit protein expression of eIFs (4E, 4G), bFGF, and VEGF. In vivo, the growth of HEp-2 cell-transplanted tumors in nude mice was inhibited by intraperitoneal injection of elemene. Compared with control groups, elemene significantly inhibited the protein expression of eIFs (4E and 4G), bFGF, and VEGF and decreased the MVD. Conclusions: Elemene inhibits the growth of HEp-2 cells in vitro and in vivo. These data provide useful information for further clinical study on the treatment of LSCC by elemene.
Antiproliferative effect of β-elemene in chemoresistant ovarian carcinoma cells
In this study, we show that beta-elemene inhibited the proliferation of cisplatin-resistant human ovarian cancer cells and their parental cells, but had only a marginal effect in human ovary cells, indicating differential inhibitory effects on cell growth between ovarian cancer cells and normal ovary cells.Effect of Local Arterial Infusion of β_elemene on Breast Cancer Tissue Inhibition and Cell Apoptosis and Proliferation
“ The effect of local arterial infusion of β_elemene on breast cancer tissue inhibition and cell apoptosis and proliferation was observed.N-(beta-Elemene-13-yl)tryptophan methyl ester induces apoptosis in human leukemia cells
“ Beta-elemene is an active component of herb medicine Curcuma Wenyujin and N-(beta-elemene-13-yl)tryptophan methyl ester (ETME) was synthesized for increasing its antitumor activity. ETME induced apoptosis in human leukemia HL-60 and NB4 cells at concentrations less than 40 microM. The apoptosis induction ability of ETME was associated with the production of hydrogen peroxide (H(2)O(2)), the decrease of mitochondrial membrane potential, and the activation of caspase-3 that was blocked by catalase. ETME in combination with arsenic trioxide (As(2)O(3)), an agent used to treat acute promyelocytic leukemia, synergistically induced apoptosis in both cell lines by enhanced production of H(2)O(2). These data suggest that ETME induces apoptosis and synergizes with As(2)O(3) in leukemia cells through a H(2)O(2)-dependent pathway.
Foods: Mushrooms, Grains & Yeast.
Mushrooms: Shiitake (Lentinula edodes), Reishi (Ganoderma lucidum & Ganoderma tsugae), Maitake (Grifola frondosa), Oyster Mushroom (Pleurotus ostreatus), Cauliflower Mushroom (Sparassis). Grains: Oats, Barley.
Fights cancer and eases the effects of radiation.
NOTE: Literally all of the listed mushrooms above have other important anti-cancer effects not necessarily specified here
ß-Glucan...Uses Antibodies to Target Tumors for Cytotoxic Recognition by Leukocyte Complement Receptor Type 3
“ ß-Glucans were identified 36 years ago as a biologic response modifier that stimulated tumor rejection. In vitro studies have shown that ß-glucans bind to a lectin domain within complement receptor type 3 (CR3; known also as Mac-1, CD11b/CD18, or Mß2-integrin, that functions as an adhesion molecule and a receptor for factor I-cleaved C3b, i.e., iC3b) resulting in the priming of this iC3b receptor for cytotoxicity of iC3b-opsonized target cells. This investigation explored mechanisms of tumor therapy with soluble ß-glucan in mice. Normal mouse sera were shown to contain low levels of Abs reactive with syngeneic or allogeneic tumor lines that activated complement, depositing C3 onto tumors. Implanted tumors became coated with IgM, IgG, and C3, and the absent C3 deposition on tumors in SCID mice was reconstituted with IgM or IgG isolated from normal sera. Therapy of mice with glucan- or mannan-rich soluble polysaccharides exhibiting high affinity for CR3 caused a 57–90% reduction in tumor weight. In young mice with lower levels of tumor-reactive Abs, the effectiveness of ß-glucan was enhanced by administration of a tumor-specific mAb, and in SCID mice, an absent response to ß-glucan was reconstituted with normal IgM or IgG. The requirement for C3 on tumors and CR3 on leukocytes was highlighted by therapy failures in C3- or CR3-deficient mice. Thus, the tumoricidal function of CR3-binding polysaccharides such as ß-glucan in vivo is defined by natural and elicited Abs that direct iC3b deposition onto neoplastic cells, making them targets for circulating leukocytes bearing polysaccharide-primed CR3. Therapy fails when tumors lack iC3b, but can be restored by tumor-specific Abs that deposit iC3b onto the tumors.
Yeast ß-Glucan Amplifies Phagocyte Killing of iC3b-Opsonized Tumor Cells
“ Anti-tumor mAbs hold promise for cancer therapy, but are relatively inefficient. Therefore, there is a need for agents that might amplify the effectiveness of these mAbs. One such agent is -glucan, a polysaccharide produced by fungi, yeast, and grains, but not mammalian cells. -Glucans are bound by C receptor 3 (CR3) and, in concert with target-associated complement fragment iC3b, elicit phagocytosis and killing of yeast. -Glucans may also promote killing of iC3b-opsonized tumor cells engendered by administration of anti-tumor mAbs. In this study, we report that tumor-bearing mice treated with a combination of -glucan and an anti-tumor mAb show almost complete cessation of tumor growth.
Chemosensitization of Carmustine with Maitake β-Glucan on Androgen-Independent Prostatic Cancer Cells
“ This study demonstrates a sensitized cytotoxic effect of BCNU with β-glucan in PC-3 cells, which was associated with a drastic (~80%) inactivation of Gly-I. Therefore, the BCNU/β-glucan combination may help to improve current treatment efficacy by targeting Gly-I, which appears to be critically involved in prostate cancer viability.
Beta glucan induces proliferation and activation of monocytes in peripheral blood of patients with advanced breast cancer
“ Glucans are glucose polymers that constitute a structural part of fungal cell wall. They can stimulate the innate immunity by activation of monocytes/macrophages. In human studies it has been shown that beta glucan has an immunomodulatory effect and can increase the efficacy of the biological therapies in cancer patients. In this prospective clinical trial we assessed in vivo effects of short term oral beta glucan administration on peripheral blood monocytes and their expression of activation markers in patients with advanced breast cancer. ...Oral beta glucan administration seems to stimulate proliferation and activation of peripheral blood monocytes in vivo in patients with advanced breast cancer.
Source: Lithospermum (herbs).
ß-Hydroxyisovalerylshikonin Inhibits the Cell Growth of Various Cancer Cell Lines and Induces Apoptosis in Leukemia HL–60 Cells
“ ß-Hydroxyisovalerylshikonin (ß-HIVS), which was isolated from the plant, Lithosper-mium radix, inhibited the growth of various lines of cancer cells derived from human solid, tumors at low concentrations between 10-8 and 10-6 M. When HL-60 cells were treated with 10-6 M ß-HIVS for 3 h, characteristic features of apoptosis, such as DNA fragmentation, nuclear fragmentation, and activation of caspase-3–like activity, were observed.
β-Hydroxyisovalerylshikonin and Cisplatin Act Synergistically to Inhibit Growth and to Induce Apoptosis of Human Lung Cancer DMS114 Cells
“ beta-Hydroxyisovalerylshikonin (beta-HIVS) and cisplatin (CDDP) had a synergistic growth-inhibitory effect on cultured human small-cell lung carcinoma DMS114 cells, as well as on human leukemia U937 and epidermoid carcinoma A431 cells, while beta-HIVS and CDDP alone at the same respective concentrations had little effect.
Source: The bark of Red Alder trees & White Birch trees, and the mushroom Chaga that grows on White Birch.
Anti-Cancer Effect of Betulin on a Human Lung Cancer Cell Line
“ Betulin is a representative compound of Betula platyphylla, a tree species belonging to the Betulaceae family. In this investigation, we revealed that betulin showed anticancer activity on human lung cancer A549 cells by inducing apoptosis and changes in protein expression profiles were observed.
Betulinic Acid Inhibits Prostate Cancer Growth
“ Betulinic acid is a pentacyclic triterpene natural product initially identified as a melanoma-specific cytotoxic agent that exhibits low toxicity in animal models. Subsequent studies show that betulinic acid induces apoptosis and antiangiogenic responses in tumors derived from multiple tissues;Betulinic acid induces apoptosis in human neuroblastoma cell lines
Neuroblastoma has long been recognized to show spontaneous regression during fetal development and in the majority of stage 4s infantsApoptotic activity of betulinic acid derivatives on murine melanoma B16 cell line
“ Exposure of B16 cells to betulinic acid, 23-hydroxybetulinic acid and 3-oxo-23-hydroxybetulinic acid caused a rapid increase in reactive oxidative species production and a concomitant dissipation of mitochondrial membrane potential in a dose- and time-dependent manner, which resulted in cell apoptosis, as demonstrated by fluorescence microscopy, gel electrophoresis and flow-cytometric analysis. Cell cycle analysis further demonstrated that both 3-oxo-23-hydroxybetulinic acid and 23-hydroxybetulinic acid dramatically increased DNA fragmentation at the expense of G1 cells at doses as low as 12.5 and 25 microg/ml, respectively, thereby showing their potent apoptotic properties. Our results showed that hydroxylation at the C3 position of betulinic acid is likely to enhance the apoptotic activity of betulinic acid derivatives (23-hydroxybetulinic acid and 3-oxo-23-hydroxybetulinic acid) on murine melanoma B16 cells.
Betulinic acid: A new cytotoxic compound against malignant head and neck cancer cells
“ In two HNSCC cell lines betulinic acid induced apoptosis, which was characterized by a dose-dependent reduction in cell numbers, emergence of apoptotic cells, and an increase in caspase activity. Western blot analysis of the expression of various Bcl-2 family members in betulinic acid–treated cells showed, surprisingly, a suppression of the expression of the proapoptotic protein Bax but no changes in Mcl-1 or Bcl-2 expression.
Evidence for anti-cancer properties of blueberries: a mini-review.
“ Blueberries are amongst the most commonly consumed berries in the United States. Berries in general are rich in phenolic compounds, which are known for their high antioxidant capacity. Specifically, evidence from in vitro, in vivo and a few clinical studies suggest that blueberries and their active constituents show promise as effective anti-cancer agents, both in the form of functional foods and as nutritional supplements. Some of the mechanisms by which blueberries have been shown to prevent carcinogenesis include inhibition of the production of pro-inflammatory molecules, oxidative stress and products of oxidative stress such as DNA damage, inhibition of cancer cell proliferation and increased apoptosis. This review will focus on the preclinical and clinical evidence that supports blueberries as an anti-cancer fruit, as well as expressing the need for more preclinical studies and the conduction of clinical studies with respect to the cancer preventive ability of blueberries.
Effect of Anthocyanin Fractions from Selected Cultivars of Georgia-Grown Blueberries on Apoptosis and Phase II Enzymes
“ The response correlated positively with dose. The QR activity was lower in all cells treated with an anthocyanin fraction from Tifblue, Powderblue, Brightblue, and Brightwell cultivars than in control cells (P < 0.05). The activity decreased gradually when treated with increased concentrations of anthocyanin fractions (50−150 μg/mL) in the Tifblue and Powderblue cultivars. The GST activity was lower (P < 0.05) in cells treated with anthocyanin fractions from all of the cultivars and at all concentrations. These results indicated that apoptosis was confirmed in HT-29 cells when treated with anthocyanins from blueberry cultivars at 50−150 μg/mL concentrations, but these same concentrations decrease QR and GST activities rather than induce them.Availability of blueberry phenolics for microbial metabolism in the colon and the potential inflammatory implications
“ Blueberries are a rich source of phenylpropanoid-derived phytochemicals, widely studied for their potential health benefits. Of particular interest for colonic health are the lower molecular weight phenolic acids and their derivatives, as these are the predominant phenolic compounds detected in the colon. Blueberries contained a wide variety of phenolic acids, the majority of which (3371.14 ± 422.30 mg/kg compared to 205.06 ± 45.34 mg/kg for the free phenolic acids) were attached to other plant cell-wall components and therefore, likely to become available in the colon. Cytokine-induced stimulation of the inflammatory pathways in colon cells was four-fold up-regulated in the presence of the free phenolic acid fraction. Incubation of the bound phenolic acids with human faecal slurries resulted in qualitative and quantitative differences in the phenolic compounds recovered. The metabolites obtained by incubation with faecal slurries from one volunteer significantly decreased (1.67 ± 0.69 ng/cm3) prostanoid production, whereas an increase (10.78 ± 5.54 ng/cm3) was obtained with faecal slurries from another volunteer. These results suggest that any potential protective effect of blueberry phenolics as anti-inflammatory agents in the colon is a likely result of microbial metabolism. Studies addressing a wide-range of well-characterised human volunteers will be required before such health claims can be fully established.
Relatives: Romanesco, Broccoflower, Cauliflower, Kale, Raab, Brussel Sprouts, Cabbage, Collards and Kohl Rabi.
Natural Compound in Broccoli Slows Breast Cancer Stem Cells
“ In lab studies, when breast cancer cells were exposed to sulforaphane extract from broccoli, the growth of cancer stems cells slowed down and tumors shrank. The researchers speculate about the possible use of sulforaphane extract to prevent as well as treat breast cancer, someday.Broccoli Sprouts contain 3X the amount of Sulforaphane Glucosinolate
“Johns Hopkins University researchers found that young broccoli sprouts, in particular, contained high concentrations of SGS. The scientists believe that SGS boosts the body's own antioxidant defense system, including Phase 2 detoxification enzymes, which promote long-lasting antioxidant activity in the body.
“At the University of California at Berkeley, the Chairman of the Nutritional Sciences Department and the Director of the National Institutes of Health Cancer Research Program were studying the biological properties of Diindolylmethane (DIM), a naturally occurring compound found in Brassica vegetables (broccoli, cauliflower, cabbage, kale, brussels sprouts), when they made a remarkable discovery: DIM is a potent activator of the immune response system. They patented their discovery and ActivaMune was launched as a first-in-class nutritional supplement to enhance the immune system and support multiple organs throughout the body: breast, prostate, cardiovascular, vision, skin and colon health. ActivaMune's unique and patented formula combines multiple nutrients for maximum effectiveness: Diindolylmethane (DIM), Sulforaphane, Selenium, Lycopene, Lutein, Zeaxanthin, Calcium and Vitamins C, D3 & E.
Surprising Discovery Reveals How Broccoli Fights Cancer
“Broccoli — and to an even greater degree broccoli sprouts — has gained a reputation as a potent cancer-fighter, and recent research sheds new light on the actual mechanics behind its chemoprotective abilities.
One of the compounds in broccoli known to have anti-cancer activity is sulforaphane, a naturally occurring organic sulfur.
Studies have shown sulforaphane supports normal cell function and division while causing apoptosis (programmed cell death) in colon,1 prostate,2 breast3 and tobacco-induced lung cancer4 cells, and reducing the number of cancerous liver tumors in mice.5
Three servings of broccoli per week may reduce your risk of prostate cancer by more than 60 percent.6 Now, Oregon State University (OSU) researchers believe they've discovered yet another way sulforaphane works to protect you against cancer.