CYBERMED LIFE - ORGANIC  & NATURAL LIVING

Chemopreventive

  • A Polysaccharide Isolated from Mycelia of the Lion's Mane Medicinal Mushroom Hericium erinaceus (Agaricomycetes) Induced Apoptosis in Precancerous Human Gastric Cells.

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    Abstract Title:

    A Polysaccharide Isolated from Mycelia of the Lion's Mane Medicinal Mushroom Hericium erinaceus (Agaricomycetes) Induced Apoptosis in Precancerous Human Gastric Cells.

    Abstract Source:

    Int J Med Mushrooms. 2017 ;19(12):1053-1060. PMID: 29431066

    Abstract Author(s):

    Mingxing Wang, Yanqiu Zhang, Xulang Xiao, Duoduo Xu, Yang Gao, Qipin Gao

    Article Affiliation:

    Mingxing Wang

    Abstract:

    Hericium erinaceus is typically used in traditional Chinese medicine for mucosal protection, healing of gastric ulcers, and treatment of gastritis. We purified from the cultured mycelia of H. erinaceus a polysaccharide with anti-gastric ulcer and antigastritis activity, but its effects on gastric malignancy have not been elucidated. We examined the differential effects of this purified polysaccharide, named EP-1, on the human gastric (GES-1) cell line and a precancerous cell line (MC) that was transformed from GES-1 using N-methyl-N'-nitro-N-nitrosoguanidine. We observed that the polysaccharide potently induced cell apoptosis and cell cycle arrest at the G0/G1 phase in the MC cell line but did not have any effect on the GES-1 cell line at the same doses. Further mechanistic studies revealed that the polysaccharide exerted its activity through an apoptosis-associated pathway by modulating the expression of Bax, Bcl-2, and caspase-3. Differential effects of the polysaccharide on the GES-1 and MC cell lines indicate that the polysaccharide was effective in preventing gastric cancer progression.

  • A protective effect of the Mediterranean diet for cutaneous melanoma📎

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    Abstract Title:

    A protective effect of the Mediterranean diet for cutaneous melanoma.

    Abstract Source:

    Eur J Haematol. 2009 Aug;83(2):108-18. Epub 2009 Mar 5. PMID: 18621803

    Abstract Author(s):

    C Fortes, S Mastroeni, F Melchi, M A Pilla, G Antonelli, D Camaioni, M Alotto, P Pasquini

    Abstract:

    BACKGROUND: Many studies have investigated the Mediterranean diet as a risk factor for cancer, none of which has included cutaneous melanoma. The latter is usually fatal, rendering knowledge about prevention extremely important. We assessed the role of some food components of the Mediterranean diet and cutaneous melanoma.

    METHODS: A hospital-based case-control study was conducted in the inpatient wards of IDI-San Carlo Rome, Italy including 304 incident cases of cutaneous melanoma and 305 controls, frequency matched to cases. Information on socio-demographic characteristics, medical history, smoking, sun exposure, pigmentary characteristics and diet was collected. Logistic regression was the method used to estimated odds ratio and 95% CIs.

    RESULTS: After careful control for several sun exposure and pigmentary characteristics, we found a protective effect for weekly consumption of fish (OR, 0.65, 95%CI = 0.43-0.97), shellfish (OR, 0.53, 95%CI = 0.31-0.89), fish rich in n-3 fatty acids (OR, 0.52, 95%CI = 0.34-0.78), daily tea drinking (OR, 0.42, 95%CI, 0.18-0.95; P(trend) = 0.025) and high consumption of vegetables (OR, 0.50, 95%CI = 0.31-0.80, P(trend) = 0.005) in particular carrots, cruciferous and leafy vegetables and fruits (OR, 0.54, 95%CI =0.33-0.86, P(trend) = 0.013), in particular citrus fruits. No association was found for alcohol consumption and any other food items.

    CONCLUSION: Overall, our findings suggest that some dietary factors present in the Mediterranean diet might protect from cutaneous melanoma.

  • A Specific Mixture of Nutrients Suppresses Ovarian Cancer A-2780 Tumor Incidence, Growth, and Metastasis to Lungs. 📎

    Abstract Title:

    A Specific Mixture of Nutrients Suppresses Ovarian Cancer A-2780 Tumor Incidence, Growth, and Metastasis to Lungs.

    Abstract Source:

    Nutrients. 2017 Mar 18 ;9(3). Epub 2017 Mar 18. PMID: 28335466

    Abstract Author(s):

    Mohd Waheed Roomi, Tatiana Kalinovsky, Matthias Rath, Aleksandra Niedzwiecki

    Article Affiliation:

    Mohd Waheed Roomi

    Abstract:

    Ovarian cancer is the deadliest gynecological malignancy in women, and fifth leading cause of death. Despite advances made in chemotherapy and surgery, the average time of clinical remission is approximately 2 years and the 5-year survival rate is 45%. Thus, there is an urgent need for the development of a novel therapeutic approach to ovarian cancer treatment. We investigated the effect of a specific nutrient mixture (EPQ) containing ascorbic acid, lysine, proline, green tea extract, and quercetin on human ovarian cancer cell A-2780 in vivo and in vitro. Athymic female nude mice (n = 12) were all inoculated intraperitoneally (IP) with 2× 10⁶ cells in 0.1 mL of phosphate buffered saline (PBS) and randomly divided into two groups. Upon injection, the Control group (n = 6) was fed a regular diet and the EPQ group (n = 6) a regular diet supplemented with 0.5% EPQ. Four weeks later, the mice were sacrificed and tumors that developedin the ovary were excised, weighed, and processed for histology. Lungs were inspected for metastasis. In vitro, A-2780 cells were cultured in Dulbecco modified Eagle medium supplemented with 10% FBS and antibiotics. At near confluence, cells were treated with EPQ in triplicate at concentrations between 0 and 1000 μg/mL. Cell proliferation was measured via MTT assay, MMP-9 secretion via gelatinase zymography, invasion through Matrigel and morphology via hematoxylin and eosin (H& E) staining. All Control mice developed large ovarian tumors, whereas 5 out of 6 mice in the EPQ group developed no tumors, and one, a small tumor. Control mice also showed lung metastasis in 6 out of 6 mice, while no lung metastasis was evident in EPQ mice. Zymography demonstrated only MMP-9 expression, which EPQ inhibited in a dose-dependent fashion, with virtual total block at 250μg/mL concentration. EPQ significantly inhibited invasion through Matrigel with total block at 250 μg/mL concentration. MTT showed dose-dependent inhibition of cell proliferation with EPQ, and H& E staining showed no morphological changes below 500μg/mL EPQ. These results suggest that EPQ has therapeutic potential in the treatment of ovarian cancer by significantly suppressing ovarian tumor incidence and growth and lung metastasis, and by inhibiting MMP-9 secretion and invasion of A-2780 ovarian cancer cells.

  • Acute Effects of Vitamin C Exposure On Colonic Crypts: Direct Modulation of pH Regulation. 📎

    Abstract Title:

    Acute Effects of Vitamin C Exposure On Colonic Crypts: Direct Modulation of pH Regulation.

    Abstract Source:

    Cell Physiol Biochem. 2017 ;44(1):377-387. Epub 2017 Nov 13. PMID: 29132138

    Abstract Author(s):

    Mohammed M Aldajani, Clemens N Vanicek, Norah Alhazzaa, Taras Lysyy, Raghav Agarwal, John P Geibel

    Article Affiliation:

    Mohammed M Aldajani

    Abstract:

    BACKGROUND/AIM:Colorectal cancer is still considered a leading cause of death in the United States and worldwide. One potential way to improve survival besides detection is to look to new therapeutic agents that can be taken prophylactically to reduce the risk of tumor formation. For cancer cells to grow and invade, a higher (more alkaline) intracellular pH must occur. We chose to examine a specific nutraceutical agent, which is Vitamin C. The acute effect of Vitamin C exposure on normal colonic crypts has been studied, providing some insight into how Vitamin C achieve its effect.

    METHODS:Distal colon was excised from rats. Following enzymatic digestion single colonic crypts were isolated. Colonic crypts were loaded with pH sensitive dye to measure the intracellular pH changes. Crypts were exposed to solutions +/- Vitamin C.

    RESULTS:10 mM Vitamin C decreased Na+-dependent intracellular pH recovery. Vitamin C modulates SVCT leading to changes in proton extrusion. Vitamin C entry occurs via either SVCT2 on the basolateral membrane or by transcellular passive diffusion through tight junctions to the apical membrane and then active transport via SVCT1.

    CONCLUSION:Acute addition of Vitamin C to the basolateral membrane maintains low intracellular pH for a longer period which could halt and/or prevent tumor formation.

  • Adherence to Mediterranean diet and prostate cancer risk in Sicily: population-based case-control study.

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    Abstract Title:

    Adherence to Mediterranean diet and prostate cancer risk in Sicily: population-based case-control study.

    Abstract Source:

    Int J Impot Res. 2018 Oct 18. Epub 2018 Oct 18. PMID: 30337696

    Abstract Author(s):

    Giorgio Ivan Russo, Tatiana Solinas, Daniele Urzì, Salvatore Privitera, Daniele Campisi, Andrea Cocci, Marco Carini, Massimo Madonia, Sebastiano Cimino, Giuseppe Morgia

    Article Affiliation:

    Giorgio Ivan Russo

    Abstract:

    Prostate cancer (PCa) is the second most frequently diagnosed cancer and the sixth leading cause of death from cancer worldwide. Countries following a Mediterranean-type dietary pattern, has been reported to have lower PCa incidence and mortality compared with other European regions. A population-based case-control study has been conducted from January 2015 to December 2016 in a single institution of the municipality of Catania, southern Italy. A total of 118 PCa and 238 population-based controls were collected. Controls had significantly higher adherence to the Mediterranean diet, which was evident for several subgroups (including age groups, overweight and obese men, current smokers, alcohol intake, low and medium physical activity levels). PCa cases were found to consume lower amount of vegetables (223 g/d vs. 261 g/d; p = 0.001), legumes (34.26 g/d vs. 53.55 g/d; p = 0.003), and fish (47.75 g/d vs. 58.3 g/d) than controls; other differences emerged were related to alcohol intake (12.37 g/d vs 5.07 g/d; p < 0.01), cereals (254.06 g/d vs.235.94 g/d; p < 0.001), dairy (196 g/d vs. 166 g/d; p < 0.001), and meat consumption (98.09 g/d vs. 70.15 g/d; p < 0.001). However, no statistically significant differences between cases and controls were found regarding fruit, legumes, and olive oil consumption. The Mediterranean diet score was inversely associated with lower likelihood of having PCa in a linear manner (odds ratio [OR]: 0.86 [95% CI 0.77-0.96]). Specifically, individuals in the highest group of adherence had 78% less likelihood of have PCa and 14% less likelihood for each point increase of the score. The model adjusted for total polyphenol intake showed still a significant inverse association between adherence to the Mediterranean dietand PCa, but the relation was no more linear and not significant for one-point increase of the score (OR: 0.88 [95% CI 0.77-1.01]). In our cohorts of Italian men, we observed that high adherence to the Mediterranean diet was inversely associated with likelihood of having PCa cancer.

  • Aerobic Training and Green Tea Extract Protect against NMU-induced Prostate Cancer.

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    Abstract Title:

    Aerobic Training and Green Tea Extract Protect against NMU-induced Prostate Cancer.

    Abstract Source:

    Med Sci Sports Exerc. 2019 May 29. Epub 2019 May 29. PMID: 31157709

    Abstract Author(s):

    Saber Saedmocheshi, Marziyeh Saghebjoo, Zakaria Vahabzadeh, Dariush Sheikholeslami-Vatani

    Article Affiliation:

    Saber Saedmocheshi

    Abstract:

    INTRODUCTION:Aerobic training and green tea extract can be used to reduce the risk of prostate cancer. The goal of this study was to evaluate the effects of eight-week aerobic exercise training and administration of green tea extract on the level of nuclear factor kappa B (NF-kB), cyclooxygenase-2 (COX-2) and p53 tumor suppressor protein (p53) in prostate of rats which were stimulated by N-Methyl-N-nitrosourea (NMU) to induce the prostate cancer.

    METHODS:60 adult male Wistar rats were assigned into six groups including healthy control (HCt), cancer control (CCt), cancer training (CTr: 45 min/day at low-moderate intensity, 5 times/week, 8 weeks), cancer extract (CEx: 1.34 ml of green tea extract, 3 times/week, 8 weeks), cancer training+ cancer extract (CTr+CEx) and sham groups. Rats were sacrificed 48 hours after the last intervention session, and the prostate tissue was isolated to measure the levels of NF-kB, COX-2, and p53.

    RESULTS:The NF- kB level in CCt group was increased significantly compared to the HCt (P=0.02). In the CTr group, NF-kB level was decreased significantly compared to the CCt and CEx groups (P=0.001 and 0.05, respectively). In addition, the levels of P53 protein were reduced in CTr, CEx and CTr+CEx groups compared to CCt group (P=0.001, 0.02 and 0.004, respectively). No significant changes were found in the level of COX-2 between groups.

    CONCLUSIONS:These results suggest that a long-term exercise training combined with the intake of green tea extract may reduce levels of NF-kB and p53 in rats with prostate cancer. Given the importance of recognizing complementary therapies in this regard, future studies are warranted.

  • Air pollution and DNA methylation alterations in lung cancer: A systematic and comparative study. 📎

    Abstract Title:

    Air pollution and DNA methylation alterations in lung cancer: A systematic and comparative study.

    Abstract Source:

    Oncotarget. 2016 Nov 25. Epub 2016 Nov 25. PMID: 27901495

    Abstract Author(s):

    Cheng-Lan Jiang, Shui-Wang He, Yun-Dong Zhang, He-Xian Duan, Tao Huang, Yun-Chao Huang, Gao-Feng Li, Ping Wang, Li-Ju Ma, Guang-Biao Zhou, Yi Cao

    Article Affiliation:

    Cheng-Lan Jiang

    Abstract:

    The lung cancer incidence in the Xuanwei and neighboring region, Yunnan, China, is among the highest in China and is attributed to severe air pollution with high benzo(a)pyrene levels. We systematically and comparatively analyzed DNA methylation alterations at genome and gene levels in Xuanwei lung cancer tissues and cell lines, as well as benzo(a)pyrene-treated cells and mouse samples. We obtained a comprehensive dataset of genome-wide cytosine-phosphate-guanine island methylation in air pollution-related lung cancer samples. Benzo(a)pyrene exposure induced multiple alterations in DNA methylation and in mRNA expressions of DNA methyltransferases and ten-11 translocation proteins; these alterations partially occurred in Xuanwei lung cancer. Furthermore, benzo(a)pyrene-induced DKK2 and EN1 promoter hypermethylation and LPAR2 promoter hypomethylation led to down-regulation and up-regulation of the genes, respectively; the down-regulation of DKK2 and EN1 promoted the cellular proliferation. Thus, DNA methylation alterations induced by benzo(a)pyrene contribute partially to abnormal DNA methylation in air pollution-related lung cancer, and these DNA methylation alterations may affect the development and progression of lung cancer. Additionally, vitamin C and B6 can reduce benzo(a)pyrene-induced DNA methylation alterations and may be used as chemopreventive agents for air pollution-related lung cancer.

  • An adjunctive preventive treatment for cancer: ultraviolet light and ginkgo biloba, together with other antioxidants, are a safe and powerful, but largely ignored, treatment option for the prevention of cancer.

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    Abstract Title:

    An adjunctive preventive treatment for cancer: ultraviolet light and ginkgo biloba, together with other antioxidants, are a safe and powerful, but largely ignored, treatment option for the prevention of cancer.

    Abstract Source:

    Med Hypotheses. 2006;66(6):1152-6. Epub 2006 Feb 17. PMID: 16483725

    Abstract Author(s):

    Robert Eli, James A Fasciano

    Abstract:

    Cancer has surpassed heart disease as the leading cause of death in the United States. The mortality rate for cancer is high (roughly 42%), and it increases dramatically with increasing age, especially in patients between the ages of 40 and 60 years old. Currently, the efforts at cancer prevention have been minimal. The drugs developed so far are expensive and have serious side effects. There are at least 18 vitamin D-sensitive cancers. Ultraviolet light, and specifically ultraviolet B (UVB), could reduce cancer by the limited exposure of suitable skin areas to UVB of an intensity and duration insufficient to produce skin cancer. An irrational fear of skin cancer is preventing this idea from being implemented. Though skin cancer incidence is significant, mortality from skin cancer is relatively rare. Roughly 1,000,000 Americans will be affected by skin cancer but only 10,000 deaths are expected in 2005 (a 1% mortality rate). Skin cancer is easily detected and often cured by excisional biopsy alone. Current practice among practicing clinicians is to use a prescription drug substitute for UV light, calcitriol (1-25 dihydroxycholcalciferol). However, high levels of (calcitriol) are dangerous, and there is no consensus on just what a high dose or a safe dose is. Apart from skin cancer, UV light exposure possesses few risks. Additionally, a number of botanical agents such as ginkgo biloba, vitamins E and C, carotenoids, selenium and proanthocyanidins can prevent the risk of skin cancer. Ginkgo biloba also possess the following additional cancer chemopreventive qualities: (1) promoting apoptosis of cancer cells; (2) an anti-clastogenic effect on chromosomes by repairing and reconstituting broken and damaged chromosomes; (3) a powerful therapeutic effect on the treatment of fibrosis-related cancer; (4) a therapeutic effect on free radical-induced cancer; (5) a therapeutic effect on the treatment of cancer incident to the result of numerous carcinogens; (6) a therapeutic effect on preventing free radical-induced cancer; (7) an enhancing effect on radiation therapy in the treatment of cancer; and (8) a therapeutic effect on reducing the size of cancer tumors. Ginkgo biloba is widely-used and has few adverse effects. The proposed preventive treatment for cancer consists of short intermittent exposure of the least sensitive areas of the body to sunlight and/or artificial ultraviolet light. The routine testing of plasma vitamin D levels help monitor the effectiveness of the treatment and periodic checkups with a dermatologist help monitor the safety.

  • Anticancer effect of triterpenes fromin human prostate cancer cells📎

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    Abstract Title:

    Anticancer effect of triterpenes fromin human prostate cancer cells.

    Abstract Source:

    Oncol Lett. 2017 Dec ;14(6):7467-7472. Epub 2017 Oct 9. PMID: 29344190

    Abstract Author(s):

    Lijun Qu, Sumei Li, Yumin Zhuo, Jianfan Chen, Xiaoping Qin, Guoqing Guo

    Article Affiliation:

    Lijun Qu

    Abstract:

    , within the Polyporaceae family of Basidiomycota, is a popular traditional remedy medicine used in Asia to promote health and longevity. Compounds extracted fromhave revealed anticancer, antioxidant and liver protective effects.has been associated with prostate cancer cells.extracts contain numerous bioactive components; however, the exact functional monomer is unknown and the role of triterpenes from(GLT) in prostate cancer remain obscure. The present study investigated the effects of GLT on cell viability, migration, invasion and apoptosis in DU-145 human prostate cancer cells. The results demonstrated that a high dose (2 mg/ml) of GLT inhibits cell viability in a dose- and time-dependent manner by the regulation of matrix metalloproteases. Furthermore, GLT induced apoptosis of DU-145 cells. In general, GLT exerts its effect on cancer cells via numerous mechanisms and may have potential therapeutic use for the prevention and treatment of cancer.

  • Anticancer Potential of Dietary Vitamin D and Ascorbic Acid: A Review.

    Abstract Title:

    Anticancer Potential of Dietary Vitamin D and Ascorbic Acid: A Review.

    Abstract Source:

    Crit Rev Food Sci Nutr. 2015 Oct 19:0. Epub 2015 Oct 19. PMID: 26479551

    Abstract Author(s):

    B V Sunil Kumar, Satparkash Singh, Ramneek Verma

    Article Affiliation:

    B V Sunil Kumar

    Abstract:

    Cancers have been the leading cause of death worldwide and poor diet and physical inactivity are major risk factors in cancer-related deaths. Micronutrients such as vitamins and minerals appear to have preventive properties against cancer. One important mechanism by which dietary changes can exert preventive effects on cancer is via modulation of micronutrient concentrations in target tissues. Many of these micronutrients are available in the form of dietary supplements, and the intake of these supplements is prevalent in various parts of the world. However in most cases it is not known which micronutrient (or combination of micronutrients) is best when it comes to lowering the risk of cancer. The present review illustrates the effect of vitamin D and ascorbic acid intake on preventing cancer.

  • Association between Dietary Vitamin C Intake and Risk of Prostate Cancer: A Meta-analysis Involving 103,658 Subjects. 📎

    Abstract Title:

    Association between Dietary Vitamin C Intake and Risk of Prostate Cancer: A Meta-analysis Involving 103,658 Subjects.

    Abstract Source:

    J Cancer. 2015 ;6(9):913-21. Epub 2015 Jul 28. PMID: 26284143

    Abstract Author(s):

    Xiao-Yan Bai, Xinjian Qu, Xiao Jiang, Zhaowei Xu, Yangyang Yang, Qiming Su, Miao Wang, Huijian Wu

    Article Affiliation:

    Xiao-Yan Bai

    Abstract:

    We attempted to systematically determine the association between dietary intake of vitamin C and risk of prostate cancer. PubMed and Embase were searched to obtain eligible studies published before February 2015. Cohort or case-control studies that reported the relative risk (RR)/odds ratio (OR) estimates with 95% confidence intervals (CIs) for the association between vitamin C intake and prostate cancer risk were included. Eighteen studies regarding dietary vitamin C intake were finally obtained, with a total of 103,658 subjects. The pooled RR of prostate cancer for the highest versus the lowest categories of dietary vitamin C intake was 0.89 (95%CI: 0.83-0.94; p = 0.000) with evidence of a moderate heterogeneity (I(2) = 39.4%, p = 0.045). Meta-regression analysis suggested that study design accounted for a major proportion of the heterogeneity. Stratifying the overall study according to study design yielded pooled RRs of 0.92 (95%CI: 0.86-0.99, p = 0.027) among cohort studies and 0.80 (95%CI: 0.71-0.89, p = 0.000) among case-control studies, with no heterogeneity in either subgroup. In the dose-response analysis, an inverse linear relationship between dietary vitamin C intake and prostate cancer risk was established, with a 150 mg/day dietary vitamin C intake conferred RRs of 0.91 (95%CI: 0.84-0.98, p = 0.018) in the overall studies, 0.95 (95%CI: 0.90-0.99, p = 0.039) in cohort studies, and 0.79 (95%CI: 0.69-0.91, p = 0.001) in case-control studies. In conclusion, intake of vitamin C from food was inversely associated with prostate cancer risk in this meta-analysis.

  • Association between Mediterranean diet and head and neck cancer: results of a large case-control study in Italy.

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    Abstract Title:

    Association between Mediterranean diet and head and neck cancer: results of a large case-control study in Italy.

    Abstract Source:

    Eur J Cancer Prev. 2016 Aug 1. Epub 2016 Aug 1. PMID: 27483412

    Abstract Author(s):

    Luca Giraldi, Nikola Panic, Gabriella Cadoni, Stefania Boccia, Emanuele Leoncini

    Article Affiliation:

    Luca Giraldi

    Abstract:

    The Mediterranean diet (MD) is a known protective factor for head and neck cancer (HNC); however, there is still a lack of studies investigating this association by HNC subsite. The aim of the present study was therefore to evaluate the association between adherence to MD and HNC overall and by cancer subsite, as well as the effect of the individual food components on HNC risk. A case-control study was carried out at the Gemelli Hospital of Rome (Italy). A total of 500 HNC cases and 433 controls were interviewed. Dietary intake was assessed through a validated food frequency questionnaire that collected information on over 25 food items. Odds ratios (ORs) and 95% confidence intervals (CI) of HNC were calculated using a multiple logistic regression model. We found a reduced risk of both oral cavity and pharynx cancer (OR=0.61; CI: 0.54-0.70) and larynx cancer (OR=0.64; CI: 0.56-0.73) with increasing adherence to MD. We also found a high consumption of fruit, vegetables, and legumes to be significantly associated with a lower risk of larynx as well as oral cavity and pharynx cancers. Our study showed that adherence to MD acts protectively against HNC overall and by cancer subsite.

  • Association between vitamin C Intake and the risk of cervical neoplasia: A meta-analysis.

    Abstract Title:

    Association between vitamin C Intake and the risk of cervical neoplasia: A meta-analysis.

    Abstract Source:

    Nutr Cancer. 2016 Jan 5:1-10. Epub 2016 Jan 5. PMID: 26731169

    Abstract Author(s):

    Dan Cao, Kaiying Shen, Zhunan Li, Ying Xu, Dan Wu

    Article Affiliation:

    Dan Cao

    Abstract:

    To assess the association between vitamin C intake and cervical neoplasia (CN) risk. Databases including PubMed, Embase, and Springer link were retrieved up to June 10, 2014 with predefined strategy. The combined odds ratios (ORs) and their 95% confidence intervals (CIs) were calculated for overall and subgroup analyses. The publication bias was assessed using Begg's test and Egger's test. Sensitivity analysis was also conducted. Twelve studies consisting of 1 prospective cohort study and 11 case-control studies were included. In overall analysis, vitamin C intake was significantly associated with the reduced risk of CN (OR = 0.58; 95% CI: 0.44 to 0.75; P<0.001). Subgroup analysis stratified by vitamin C dose indicated all dose categories achieved a reduced CN risk. Furthermore, increased vitamin C intake by 50 mg/day was related to the reduced risk of CN (OR = 0.92; 95% CI: 0.89 to 0.94; P<0.05). No publication bias was detected by Begg's test (P = 0.169) and no apparent fluctuation was observed in summary OR by sensitivity analysis. Vitamin C intake was inversely associated with the risk of CN and this association was dose-dependent. However, more randomized controlled trials are required for further validation.

  • Black tea polyphenols suppress cell proliferation and induce apoptosis during benzo(a)pyrene-induced lung carcinogenesis.

    Abstract Title:

    Black tea polyphenols suppress cell proliferation and induce apoptosis during benzo(a)pyrene-induced lung carcinogenesis.

    Abstract Source:

    Eur J Cancer Prev. 2005 Jun;14(3):215-21. PMID: 15901989

    Abstract Author(s):

    S Banerjee, S Manna, P Saha, C Kr Panda, S Das

    Abstract:

    One of the most promising strategies for cancer prevention is chemoprevention by daily used food and beverages. Black tea, the most widely consumed beverage, is a source of compounds with antioxidative, antimicrobial, antimutagenic and anticarcinogenic properties. Lung cancer is the most common cause of cancer deaths in both men and women worldwide. Over one million people around the world are likely to be killed by lung cancer due to increased tobacco smoking and environmental pollutants, especially car exhausts. Therefore chemopreventive intervention using black tea and its active components may be a viable means to reduce lung cancer death. In the present investigation, we used benzo(a)pyrene (BP) to induce lung carcinogenesis in mice for the assessment of potential apoptosis-inducing and proliferation-suppressing effects of theaflavins and epigallocatechin gallate, active components of black tea. Hyperplasia, dysplasia and carcinoma in situ evident in the carcinogen control group on the 8th, 17th and 26th weeks respectively, were effectively reduced after treatment with theaflavins and epigallocatechin gallate. Significant reduction in number of proliferating cells and increased number of apoptotic cells was also found on the 8th, 17th and 26th week of treatment with theaflavins and epigallocatechin gallate in BP-exposed mice. Our observation suggests a promising role for black tea polyphenols in the prevention of lung cancer.

  • Cannabisin B induces autophagic cell death by inhibiting the AKT/mTOR pathway and S phase cell cycle arrest in HepG2 cells.

    Abstract Title:

    Cannabisin B induces autophagic cell death by inhibiting the AKT/mTOR pathway and S phase cell cycle arrest in HepG2 cells.

    Abstract Source:

    Food Chem. 2013 Jun 1 ;138(2-3):1034-41. Epub 2012 Dec 5. PMID: 23411211

    Abstract Author(s):

    Tianpeng Chen, Jianxiong Hao, Jinfeng He, Jianchun Zhang, Yingcong Li, Rui Liu, Lite Li

    Article Affiliation:

    Tianpeng Chen

    Abstract:

    This study investigates the anticancer properties of cannabisin B, purified from hempseed hull, in HepG2 human hepatoblastoma cells. The results indicate that cannabisin B significantly inhibited cell proliferation by inducing autophagic cell death rather than typical apoptosis. Cell viability transiently increased upon the addition of a low concentration of cannabisin B but decreased upon the addition of high concentrations. Cannabisin B-induced changes in cell viability were completely inhibited by pre-treatment with 3-methyladenine (3-MA), indicating that the induction of autophagy by cannabisin B caused cell death. Additionally, cannabisin B induced S phase cell cycle arrest in a dose-dependent manner. Moreover, cannabisin B was found to inhibit survival signaling by blocking the activation of AKT and down-stream targets of the mammalian target of rapamycin (mTOR). These findings suggest that cannabisin B possesses considerable antiproliferative activity and that it may be utilised as a promising chemopreventive agent against hepatoblastoma disease.

  • Chemopreventive

  • Consumption of raw cruciferous vegetables is inversely associated with bladder cancer risk📎

    Abstract Title:

    Consumption of raw cruciferous vegetables is inversely associated with bladder cancer risk.

    Abstract Source:

    Cancer Epidemiol Biomarkers Prev. 2008 Apr;17(4):938-44. PMID: 18398034

    Abstract Author(s):

    Li Tang, Gary R Zirpoli, Khurshid Guru, Kirsten B Moysich, Yuesheng Zhang, Christine B Ambrosone, Susan E McCann

    Abstract:

    Cruciferous vegetables contain isothiocyanates, which show potent chemopreventive activity against bladder cancer in both in vitro and in vivo studies. However, previous epidemiologic studies investigating cruciferous vegetable intake and bladder cancer risk have been inconsistent. Cooking can substantially reduce or destroy isothiocyanates, and could account for study inconsistencies. In this hospital-based case-control study involving 275 individuals with incident, primary bladder cancer and 825 individuals without cancer, we examined the usual prediagnostic intake of raw and cooked cruciferous vegetables in relation to bladder cancer risk. Odds ratios (OR) and 95% confidence intervals (CI) were estimated with unconditional logistic regression, adjusting for smoking and other bladder cancer risk factors. We observed a strong and statistically significant inverse association between bladder cancer risk and raw cruciferous vegetable intake (adjusted OR for highest versus lowest category = 0.64; 95% CI, 0.42-0.97), with a significant trend (P = 0.003); there were no significant associations for fruit, total vegetables, or total cruciferous vegetables. The associations observed for total raw crucifers were also observed for individual raw crucifers. The inverse association remained significant among current and heavy smokers with three or more servings per month of raw cruciferous vegetables (adjusted ORs, 0.46 and 0.60; 95% CI, 0.23-0.93 and 0.38-0.93, respectively). These data suggest that cruciferous vegetables, when consumed raw, may reduce the risk of bladder cancer, an effect consistent with the role of dietary isothiocyanates as chemopreventive agents against bladder cancer.

  • Cryotherapy in the management of premalignant and malignant conditions of the esophagus. 📎

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    Abstract Title:

    Cryotherapy in the management of premalignant and malignant conditions of the esophagus.

    Abstract Source:

    World J Gastroenterol. 2018 Nov 21 ;24(43):4862-4869. PMID: 30487696

    Abstract Author(s):

    Pooja Lal, Prashanthi N Thota

    Article Affiliation:

    Pooja Lal

    Abstract:

    Endoscopic cryotherapy is a relatively new thermal ablative modality used for the treatment of neoplastic lesions of the esophagus. It relies on cycles of rapid cooling and thawing to induce tissue destruction with a cryogen (liquid nitrogen or carbon dioxide) leading to intra and extra-cellular damage. Surgical treatment was once considered the standard therapeutic intervention for neoplastic diseases of the esophagus and is associated with considerable rates of morbidity and mortality. Several trials that evaluated cryotherapy in Barrett's esophagus (BE) associated neoplasia showed reasonable efficacy rates and safety profile. Cryotherapy has also found applications in the treatment of esophageal cancer, both for curative and palliative intent. Cryotherapy has also shown promising results as salvage therapy in cases refractory to radiofrequency ablation treatment. Cryoballoon focal ablation using liquid nitrogen is a novel mode of cryogen delivery which has been used for the treatment of BE with dysplasia and squamous cell carcinoma. Most common side effects of cryotherapy reported in the literature include mild chest discomfort, esophageal strictures and bleeding. In conclusion, cryotherapy is an effective and safe method for the treatment of esophageal neoplastic processes, ranging from early stages of low grade dysplasia to esophageal cancer.

  • Ecological Studies of the UVB-Vitamin D-Cancer Hypothesis. 📎

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    Abstract Title:

    Ecological Studies of the UVB-Vitamin D-Cancer Hypothesis.

    Abstract Source:

    Anticancer Res. 2012 Jan ;32(1):223-36. PMID: 22213311

    Abstract Author(s):

    William B Grant

    Article Affiliation:
    Abstract:

    UNLABELLED:Background/Aim: This paper reviews ecological studies of the ultraviolet-B (UVB)-vitamin D-cancer hypothesis based on geographical variation of cancer incidence and/or mortality rates.

    MATERIALS AND METHODS:The review is based largely on three ecological studies of cancer rates from the United States; one each from Australia, China, France, Japan, and Spain; and eight multicountry, multifactorial studies of cancer incidence rates from more than 100 countries.

    RESULTS:This review consistently found strong inverse correlations with solar UVB for 15 types of cancer: bladder, breast, cervical, colon, endometrial, esophageal, gastric, lung, ovarian, pancreatic, rectal, renal, and vulvar cancer; and Hodgkin's and non-Hodgkin's lymphoma. Weaker evidence exists for nine other types of cancer: brain, gallbladder, laryngeal, oral/pharyngeal, prostate, and thyroid cancer; leukemia; melanoma; and multiple myeloma.

    CONCLUSION:The evidence for the UVB-vitamin D-cancer hypothesis is very strong in general and for many types of cancer in particular.

  • Effect of a nutrient mixture on the localization of extracellular matrix proteins in HeLa human cervical cancer xenografts in female nude mice. 📎

    Abstract Title:

    Effect of a nutrient mixture on the localization of extracellular matrix proteins in HeLa human cervical cancer xenografts in female nude mice.

    Abstract Source:

    Exp Ther Med. 2015 Sep ;10(3):901-906. Epub 2015 Jun 23. PMID: 26622412

    Abstract Author(s):

    M Waheed Roomi, John Cha, Tatiana Kalinovsky, Nusrath Roomi, Aleksandra Niedzwiecki, Matthias Rath

    Article Affiliation:

    M Waheed Roomi

    Abstract:

    Cervical cancer is one of the most commonly diagnosed cancers and a significant cause of mortality in women worldwide. Although cervical cancer is fully treatable in the early stages, once it has metastasized, patient outcome is poor. The objective of the present study was to investigate the effect of dietary supplementation with a nutrient mixture (NM) containing lysine, ascorbic acid, proline, green tea extract and other micronutrients on the expression of extracellular matrix (ECM) proteins in HeLa cell xenografts in nude female mice. After housing for 1 week, female athymic nude mice between 5 and 6 weeks of age (n=12) were inoculated subcutaneously with 3×10(6) HeLa cells in phosphate-buffered saline and Matrigel and randomly divided into two groups. These were the control group, in which the mice were fed with regular mouse chow, and the NM group, in which the mice were fed with the regular diet supplemented with 0.5% NM (w/w). After 4 weeks, thetumors were excised and processed for histology. Tumor growth was evaluated and the tumors were stained for the ECM proteins collagen I, collagen IV, fibronectin, laminin, periodic acid-Schiff (PAS) and elastin. NM strongly inhibited (by 59%, P=0.001) the growth of HeLa xenografts in nude mice. Tumors from control mice exhibited little to no collagen I expression either internally or in the fibrous capsule, while tumors from the NM group expressed collagen I in the fibrous capsule and within the tumor. Tumors from the control group showed diffuse cytoplasmic and capsular collagen IV with abundant nucleated cells. NM treatment substantially increased collagen IV production and induced a dense fibrous network of collagen IV with chambers that surrounded live nucleated cells and large amounts of necrotic cell debris. Tumors from the mice fed with the NM exhibited a well-defined border of fibronectin in the capsule and intense areas of staining internally whereas control group tumors showed less overall fibronectin with sporadic internal staining and little in the fibrous capsule. Although laminin appeared abundantly in control and NM-treated tumors, the NM group tumors exhibited a chamber-like network of laminin internally. Tumors from the control group exhibited internal areas of intense PAS staining, whereas tumors from the NM-treated group exhibited a more uniform diffuse pattern of PAS staining. In conclusion, NM supplementation of HeLa xenograft-bearing female nude mice demonstrated a potent inhibition of tumor growth and enhancement of ECM proteins, suggesting the therapeutic value of this specific nutrient complex in the treatment of cervical cancer.

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