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Bodnar M, Szczyglowska M, Konieczka P, Namiesnik J. Methods of Selenium Supplementation: Bioavailability and Determination of Selenium Compounds. Crit Rev Food Sci Nutr 2014; 56:36-55. [DOI: 10.1080/10408398.2012.709550] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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152
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Dharmasena A. Selenium supplementation in thyroid associated ophthalmopathy: an update. Int J Ophthalmol 2014; 7:365-75. [PMID: 24790886 DOI: 10.3980/j.issn.2222-3959.2014.02.31] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 12/12/2013] [Indexed: 12/18/2022] Open
Abstract
The therapeutic effect of selenium (Se) has already been proven in thyroid disease and thyroid associated ophthalmopathy (TAO). In spite of clear scientific proof of its benefits in TAO, there appears to be no clear agreement among the clinicians regarding its optimum dose, duration of the treatment, efficacy and safety to date. In this review, the author summarises the findings of 135 English language articles published on this subject over the past four decades from 1973 to 2013. The regulation and metabolism of thyroid hormones require a steady supply of Se and recent studies have revealed several possible mechanisms by which Se improves the severity of thyroid disease and TAO. These mechanisms include 1) inhibitory effect of HLA-DR molecule expression on thyrocytes; 2) profound reductions of thyroid stimulating hormone (TSH) receptor antibodies (TSHR-Ab) and TPO antibodies (TPO-Ab); 3) prevention of dysregulation of cell-mediated immunity and B cell function; 4) neutralising reactive oxygen species (ROS) and inhibition of redox control processes required for the activation, differentiation and action of lymphocytes, macrophages, neutrophils, natural killer cells involved in both acute and chronic orbital inflammation in TAO; 5) inhibition of expression of pro-inflammatory cytokines and 6) inhibition of prostaglandin and leukotriene synthesis. An increased oxidative stress has been observed in both acute and chronic phases of thyroid disease with raised tissue concentrations of ROS. The benefits of Se supplementation in individuals with TAO appear to be proportionate to the degree of systemic activity of the thyroid disease. The maximal benefit of Se supplementation is therefore seen in the subjects who are hyperthyroid. Restoration of euthyroidism is one of the main goals in the management of TAO and when anti-thyroid drugs are combined with Se, the patients with Graves' disease (GD) and autoimmune thyroiditis (AIT) achieved euthyroidism faster than those treated with anti-thyroid drugs alone. Se status of normal adult humans can vary widely and Se supplementation may confer benefit only if serum Se levels are insufficient. The author recommends that serum Se levels of patients with TAO to be assessed prior to and during Se supplementation at regular intervals to avoid potential iatrogenic chronic Se overdose.
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Affiliation(s)
- Aruna Dharmasena
- Department of Oculoplastics, Lacrimal and Orbital Surgery, Manchester Royal Eye Hospital, Oxford Road, Manchester M13 9WH, UK
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153
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Poblaciones MJ, Rodrigo S, Santamaria O, Chen Y, McGrath SP. Selenium accumulation and speciation in biofortified chickpea (Cicer arietinum L.) under Mediterranean conditions. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:1101-6. [PMID: 23983062 DOI: 10.1002/jsfa.6372] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 08/14/2013] [Accepted: 08/23/2013] [Indexed: 05/02/2023]
Abstract
BACKGROUND Millions of people have Se-deficient diets and Se-biofortified crops could prevent such deficiency. The aim of the present study was to evaluate the potential of chickpea for use in Se fertilization programs in order to increase available Se. Two foliar Se fertilizers (sodium selenate and sodium selenite) at four rates (0, 10, 20, 40 g ha(-1)) were tested in the 2010/2011 and 2011/2012 growing seasons in a field experiment conducted under semiarid Mediterranean conditions. RESULTS Sodium selenate was much more effectively taken by plants than sodium selenite, and there was a strong and linear relationship between total Se content and Se rate for both. For each gram of Se fertilizer, applied either as sodium selenate or sodium selenite, the increases of total Se concentration in grain were 126 and 87, and 25 and 19 µg Se kg(-1) dry weight, in 2010/2011 and 2011/2012, respectively. Se was found to be incorporated into chickpea grains mainly (>70%) as selenomethionine. CONCLUSION Se-enriched chickpeas would be a good candidate for inclusion in biofortification programs under semiarid Mediterranean conditions and for promotion as a 'functional food'.
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Affiliation(s)
- Maria J Poblaciones
- Department of Ingeniería del Medio Agronómico y Forestal, Escuela de Ingenierías Agrarias, University of Extremadura, 06007, Badajoz, Spain
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154
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Vinceti M, Dennert G, Crespi CM, Zwahlen M, Brinkman M, Zeegers MPA, Horneber M, D'Amico R, Del Giovane C. Selenium for preventing cancer. Cochrane Database Syst Rev 2014; 2014:CD005195. [PMID: 24683040 PMCID: PMC4441528 DOI: 10.1002/14651858.cd005195.pub3] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND This review is an update of the first Cochrane publication on selenium for preventing cancer (Dennert 2011).Selenium is a metalloid with both nutritional and toxicological properties. Higher selenium exposure and selenium supplements have been suggested to protect against several types of cancers. OBJECTIVES Two research questions were addressed in this review: What is the evidence for:1. an aetiological relation between selenium exposure and cancer risk in humans? and2. the efficacy of selenium supplementation for cancer prevention in humans? SEARCH METHODS We conducted electronic searches of the Cochrane Central Register of Controlled Trials (CENTRAL, 2013, Issue 1), MEDLINE (Ovid, 1966 to February 2013 week 1), EMBASE (1980 to 2013 week 6), CancerLit (February 2004) and CCMed (February 2011). As MEDLINE now includes the journals indexed in CancerLit, no further searches were conducted in this database after 2004. SELECTION CRITERIA We included prospective observational studies (cohort studies including sub-cohort controlled studies and nested case-control studies) and randomised controlled trials (RCTs) with healthy adult participants (18 years of age and older). DATA COLLECTION AND ANALYSIS For observational studies, we conducted random effects meta-analyses when five or more studies were retrieved for a specific outcome. For RCTs, we performed random effects meta-analyses when two or more studies were available. The risk of bias in observational studies was assessed using forms adapted from the Newcastle-Ottawa Quality Assessment Scale for cohort and case-control studies; the criteria specified in the Cochrane Handbook for Systematic Reviews of Interventions were used to evaluate the risk of bias in RCTs. MAIN RESULTS We included 55 prospective observational studies (including more than 1,100,000 participants) and eight RCTs (with a total of 44,743 participants). For the observational studies, we found lower cancer incidence (summary odds ratio (OR) 0.69, 95% confidence interval (CI) 0.53 to 0.91, N = 8) and cancer mortality (OR 0.60, 95% CI 0.39 to 0.93, N = 6) associated with higher selenium exposure. Gender-specific subgroup analysis provided no clear evidence of different effects in men and women (P value 0.47), although cancer incidence was lower in men (OR 0.66, 95% CI 0.42 to 1.05, N = 6) than in women (OR 0.90, 95% CI 0.45 to 1.77, N = 2). The most pronounced decreases in risk of site-specific cancers were seen for stomach, bladder and prostate cancers. However, these findings have limitations due to study design, quality and heterogeneity that complicate interpretation of the summary statistics. Some studies suggested that genetic factors may modify the relation between selenium and cancer risk-a hypothesis that deserves further investigation.In RCTs, we found no clear evidence that selenium supplementation reduced the risk of any cancer (risk ratio (RR) 0.90, 95% CI 0.70 to 1.17, two studies, N = 4765) or cancer-related mortality (RR 0.81, 95% CI 0.49 to 1.32, two studies, N = 18,698), and this finding was confirmed when the analysis was restricted to studies with low risk of bias. The effect on prostate cancer was imprecise (RR 0.90, 95% CI 0.71 to 1.14, four studies, N = 19,110), and when the analysis was limited to trials with low risk of bias, the interventions showed no effect (RR 1.02, 95% CI 0.90 to 1.14, three studies, N = 18,183). The risk of non-melanoma skin cancer was increased (RR 1.44, 95% CI 0.95 to 1.17, three studies, N = 1900). Results of two trials-the Nutritional Prevention of Cancer Trial (NPCT) and the Selenium and Vitamin E Cancer Trial (SELECT)-also raised concerns about possible increased risk of type 2 diabetes, alopecia and dermatitis due to selenium supplements. An early hypothesis generated by NPCT that individuals with the lowest blood selenium levels at baseline could reduce their risk of cancer, particularly of prostate cancer, by increasing selenium intake has not been confirmed by subsequent trials. As the RCT participants were overwhelmingly male (94%), gender differences could not be systematically assessed. AUTHORS' CONCLUSIONS Although an inverse association between selenium exposure and the risk of some types of cancer was found in some observational studies, this cannot be taken as evidence of a causal relation, and these results should be interpreted with caution. These studies have many limitations, including issues with assessment of exposure to selenium and to its various chemical forms, heterogeneity, confounding and other biases. Conflicting results including inverse, null and direct associations have been reported for some cancer types.RCTs assessing the effects of selenium supplementation on cancer risk have yielded inconsistent results, although the most recent studies, characterised by a low risk of bias, found no beneficial effect on cancer risk, more specifically on risk of prostate cancer, as well as little evidence of any influence of baseline selenium status. Rather, some trials suggest harmful effects of selenium exposure. To date, no convincing evidence suggests that selenium supplements can prevent cancer in humans.
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Affiliation(s)
- Marco Vinceti
- University of Modena and Reggio EmiliaDepartment of Diagnostic, Clinical and Public Health MedicineVia Campi 287ModenaItaly41125
| | - Gabriele Dennert
- University of Applied Sciences DortmundSocial Medicine and Public Health with Focus on Gender and Diversity, Department of Applied Social SciencesEmil‐Figge‐Str. 44DortmundGermanyD‐44227
| | - Catherine M Crespi
- University of California Los AngelesBiostatisticsFielding School of Public Health650 Charles Young Drive South, A2‐125 CHS, Box 95690090095‐6900USALos Angeles
| | - Marcel Zwahlen
- University of BernInstitute of Social and Preventive MedicineFinkelhubelweg11BernSwitzerland3012
| | - Maree Brinkman
- Cancer Council VictoriaCancer Epidemiology Centre615 St Kilda RdMelbourneAustralia3004
| | | | - Markus Horneber
- Paracelsus Medical University, Klinikum NurembergDepartment of Internal Medicine, Division of Oncology and HematologyProf.‐Ernst‐Nathan‐Str. 1NurembergGermanyD‐90419
| | - Roberto D'Amico
- University of Modena and Reggio EmiliaItalian Cochrane Centre, Department of Diagnostic, Clinical and Public Health MedicineVia del Pozzo 71ModenaItaly41124
| | - Cinzia Del Giovane
- University of Modena and Reggio EmiliaItalian Cochrane Centre, Department of Diagnostic, Clinical and Public Health MedicineVia del Pozzo 71ModenaItaly41124
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Mahmoudvand H, Fasihi Harandi M, Shakibaie M, Aflatoonian MR, ZiaAli N, Makki MS, Jahanbakhsh S. Scolicidal effects of biogenic selenium nanoparticles against protoscolices of hydatid cysts. Int J Surg 2014; 12:399-403. [PMID: 24686032 DOI: 10.1016/j.ijsu.2014.03.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 02/14/2014] [Accepted: 03/26/2014] [Indexed: 01/02/2023]
Abstract
Cystic echinococcosis (hydatid cyst, CE) as a zoonotic parasitic infection caused by the larval stage of the dog tapeworm Echinococcus granulosus is still an important economic and public health concern in the world. One of the treatment options for CE is surgical removal of the cysts combined with chemotherapy using albendazole and/or mebendazole before and after surgery. Currently, many scolicidal agents, which have some complications, have been used for inactivation of the cyst contents. Therefore the development of new scolicidal agents with low side effects and more efficacies is an urgent need for surgeons. The present study was aimed to investigate the in vitro scolicidal effect of selenium nanoparticles biosynthesized by a newly isolated marine bacterial strain Bacillus sp. MSh-1 against protoscoleces of E. granulosus. Protoscolices were aseptically aspirated from sheep livers having hydatid cysts. Various concentrations (50-500 μg/ml) of Se NPs (in size range of about 80-220 nm) were used for 10-60 min. Viability of protoscoleces was confirmed by 0.1% eosin staining. The results indicated that biogenic Se NPs at all concentrations have potent scolicidal effects especially at concentrations 500 and 250 μg/ml after 10 and 20 min of application, respectively. In conclusion, the findings of present study proven that Se NPs have potent scolicidal effects, therefore may be used in CE surgery. However, the in vivo efficacy of these NPs remains to be explored.
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Affiliation(s)
- Hossein Mahmoudvand
- Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran; Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
| | - Majid Fasihi Harandi
- Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
| | - Mojtaba Shakibaie
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
| | - Mohammad Reza Aflatoonian
- Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran
| | - Naser ZiaAli
- Department of Medical Parasitology and Mycology, Kerman University of Medical Sciences Kerman, Iran
| | - Mahsa Sadat Makki
- Department of Medical Parasitology, Tehran University of Medical Sciences Tehran, Iran
| | - Sareh Jahanbakhsh
- Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran; Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
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156
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Hu J, Zhao Q, Cheng X, Selomulya C, Bai C, Zhu X, Li X, Xiong H. Antioxidant activities of Se-SPI produced from soybean as accumulation and biotransformation reactor of natural selenium. Food Chem 2014; 146:531-7. [PMID: 24176378 DOI: 10.1016/j.foodchem.2013.09.087] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 09/05/2013] [Accepted: 09/16/2013] [Indexed: 10/26/2022]
Abstract
A study to compare the uptake, translocation, and distribution of selenium (Se) in soybean planted in natural seleniferous soil in Fengcheng city of China was conducted to clarify the relationship between the Se content levels of soybean proteins and their radical scavenging activity. The data showed that the total Se content in different parts of soybean plants varied with the growth periods. The selenoprotein (Se-SPI) content increased remarkably with the increase of Se content in seleniferous soils. The Se-SPI content obtained from the region with the highest Se level was almost 18 times higher than that of the control group, while antioxidant activities were about 4-fold compared to the control, suggesting that Se played a positive role in enhancing the antioxidant activity of Se-SPI. The increase in the Se level also led to changes in amino acids composition, but with nearly no effects on the subunit composition of soybean Se-SPI.
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Affiliation(s)
- Juwu Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Jiangxi 330047, China; Jiangxi Academy of Sciences, Jiangxi 330029, China
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157
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Bhattacharjee A, Basu A, Ghosh P, Biswas J, Bhattacharya S. Protective effect of Selenium nanoparticle against cyclophosphamide induced hepatotoxicity and genotoxicity in Swiss albino mice. J Biomater Appl 2014; 29:303-317. [PMID: 24522241 DOI: 10.1177/0885328214523323] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cyclophosphamide (CP) is the most commonly used chemotherapeutic drug for various types of cancer. However, its use causes severe cytotoxicity to normal cells in human. It is well known that the undesirable side effects are caused due to the formation of reactive oxygen species. Selenium is an essential micronutrient for both animals and humans and has antioxidant and membrane stabilizing property, but selenium is also toxic above certain level. Nano selenium has been well proved to be less toxic than inorganic selenium as well as certain organoselenium compounds. The objective of the study is to evaluate the protective role of Nano-Se against CP-induced hepatotoxicity and genotoxicity in Swiss albino mice. CP was administered intraperitoneally (25 mg/kg b.w.) and Nano-Se was given by oral gavages (2 mg Se/kg b.w.) in concomitant and pretreatment scheme. Intraperitoneal administration of CP induced hepatic damage as indicated by the serum marker enzymes aspartate and alanine transaminases and increased the malonaldehyde level, depleted the glutathione content and antioxidant enzyme activity (glutathione peroxidase, glutathione-s-transferase, superoxide dismutase and catalase), and induced DNA damage and chromosomal aberration. Oral administration of Nano-Se caused a significant reduction in malonaldehyde, ROS level and glutathione levels, restoration of antioxidant enzyme activity, reduction in chromosomal aberration in bone marrow, and DNA damage in lymphocytes and also in bone marrow. Moreover, the chemoprotective efficiency of Nano-Se against CP induced toxicity was confirmed by histopathological evaluation. The results support the protective effect of Nano-Se against CP-induced hepatotoxicity and genotoxicity.
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Affiliation(s)
- Arin Bhattacharjee
- Chittaranjan National Cancer Institute, Department of Cancer Chemoprevention, Kolkata, West Bengal, India
| | - Abhishek Basu
- Chittaranjan National Cancer Institute, Department of Cancer Chemoprevention, Kolkata, West Bengal, India
| | - Prosenjit Ghosh
- Chittaranjan National Cancer Institute, Department of Cancer Chemoprevention, Kolkata, West Bengal, India
| | - Jaydip Biswas
- Chittaranjan National Cancer Institute, Department of Translational Research, Kolkata, West Bengal, India
| | - Sudin Bhattacharya
- Chittaranjan National Cancer Institute, Department of Cancer Chemoprevention, Kolkata, West Bengal, India
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158
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Concentration of cd, pb, hg, and se in different parts of human breast cancer tissues. J Toxicol 2014; 2014:413870. [PMID: 24659998 PMCID: PMC3934588 DOI: 10.1155/2014/413870] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 12/05/2013] [Accepted: 12/18/2013] [Indexed: 12/03/2022] Open
Abstract
Breast cancer is the major cause of cancer morbidity and mortality between women in the world. Metals involved in environmental toxicology are closely related to tumor growth and cancer. On the other hand, some metals such as selenium have anticarcinogenic properties. The aim of this study is to determine the concentration of cadmium, lead, mercury, and selenium in separated parts of tegmen, tumor, tumor adiposity, and tegmen adiposity of 14 breast cancer tissues which have been analyzed by graphite furnace atomic absorption (AA-670) and ICP-OES (ULTIMA 2CE). Our results show that Se and Hg have maximum and minimum concentration, respectively. Statistical analysis reveals no significant differences between metal accumulations in different parts of cancer tissues (P > 0.05) and this observation might be due to the close relation of separated parts of fatty breast organ. Thus, we could conclude that a high level of these heavy metals is accumulated in Iranian cancerous breasts and their presence can be one of the reasons of cancer appearance.
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159
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Chen K, Peng X, Fang J, Cui H, Zuo Z, Deng J, Chen Z, Geng Y, Lai W, Tang L, Yang Q. Effects of dietary selenium on histopathological changes and T cells of spleen in broilers exposed to aflatoxin B1. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:1904-13. [PMID: 24518648 PMCID: PMC3945576 DOI: 10.3390/ijerph110201904] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 01/16/2014] [Accepted: 01/26/2014] [Indexed: 12/21/2022]
Abstract
Aflatoxin B1 (AFB1), which causes hepatocellular carcinoma and immune-suppression, is commonly found in feedstuffs. To evaluate the ability of selenium (Se) to counteract the deleterious effects of AFB1, two hundred 1-day-old male avian broilers, divided into five groups, were fed with basal diet (control group), 0.3 mg/kg AFB1 (AFB1 group), 0.3 mg/kg AFB1+0.2 mg/kg Se (+Se group I), 0.3 mg/kg AFB1+0.4 mg/kg Se (+Se group II) and 0.3 mg/kg AFB1+0.6 mg/kg Se (+Se group III), respectively. Compared with control group, the relative weight of spleen in the AFB1 group was decreased at 21 days of age. The relative weight of spleen in the three +Se groups was higher than that in the AFB1 group. By pathological observation, the major spleen lesions included congestion in red pulp and vacuoles appeared in the lymphatic nodules and periarterial lymphatic sheath in the AFB1 group. In +Se groups II and III, the incidence of major splenic lesions was decreased. The percentages of CD3+, CD3+CD4+ and CD3+CD8+ T cells in the AFB1 group were lower than those in control group from 7 to 21 days of age, while there was a marked increase in the three +Se groups compared to the AFB1 group. The results indicated that sodium selenite could improve the cellular immune function impaired by AFB1 through increasing the relative weight of spleen and percentages of splenic T cell subsets, and alleviating histopathological spleen damage.
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Affiliation(s)
- Kejie Chen
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Xi Peng
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Jing Fang
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Hengmin Cui
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Zhicai Zuo
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Junliang Deng
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Zhengli Chen
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Yi Geng
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Weimin Lai
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Li Tang
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
| | - Qingqiu Yang
- Department of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China.
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160
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Abstract
Selenium (Se) is an essential micronutrient that is incorporated into selenoproteins. Although epidemiological studies suggest that low Se intake is associated with increased risk of various cancers, the results of supplementation trials have been confusing. These conflicting results may be due to different baseline Se status and/or genetic factors. In addition, mechanistic links between Se intake, selenoproteins and carcinogenesis are not clear. In this article, we discuss the functional significance of single-nucleotide polymorphisms (SNP) in selenoprotein genes and the evidence as to whether or not they influence risk of colorectal, prostate, lung or breast cancers. Both in vitro and in vivo studies have shown that a small number of SNPs in genes encoding glutathione peroxidases 1 and 4, selenoprotein P, selenoprotein S and 15-kDa selenoprotein have functional consequences. Data from case-control studies suggest that a variant at codon 198 in glutathione peroxidase 1 influences the effect of Se status on prostate cancer and risk, and it has also been associated with breast cancer and lung cancer risk, whereas variants in glutathione peroxidase 4, selenoprotein P and selenoprotein S may influence the risk of colorectal cancer. In addition, the results of gene microarray (transcriptomic) studies have identified novel selenoprotein biomarkers of Se status and novel downstream Se-targeted pathways. The work highlights the need to take baseline Se status and genetic factors into account in the design of future intervention trials.
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161
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Yu Y, Zhang F, Lu D, Zhang H. Selenium bioavailability from shrimps (Penaeus vannamei Boone) and its effect on the metabolism of phospholipid and cholesterol ester. J Funct Foods 2014. [DOI: 10.1016/j.jff.2013.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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162
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Le TT, Van Camp J, Dewettinck K. Milk Fat Globule Membrane Material. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2014. [DOI: 10.1016/b978-0-444-63294-4.00012-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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163
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Yuan D, Zheng L, Guo XY, Wang YX, Zhan XA. Regulation of selenoprotein P concentration and expression by different sources of selenium in broiler breeders and their offspring. Poult Sci 2013; 92:2375-80. [PMID: 23960120 DOI: 10.3382/ps.2013-03155] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
An 8-wk experiment using 180 Lingnan Yellow broiler breeders was conducted to investigate the effect of different sources of Se on the concentration and gene expression of selenoprotein P (SEPP1) in broiler breeders and their offspring. After receiving a low-Se basal diet for 8 wk, broiler breeders were randomly allocated to 3 treatments (6 replicates per treatment) and fed corn-soy-based diets supplemented with 0.15 mg/kg of Se from sodium selenite (SS), Se-enriched yeast (SY), and selenomethionine (SM), respectively. Fertile eggs from different replicates were collected during the last week of the experiment and then incubated in different incubator trays in the same incubator. The concentrations and mRNA levels of SEPP1 were determined in liver and kidney of broiler breeders and their offspring, as well as the serum SEPP1 concentration. Compared with SS, both SY and SM significantly increased (P < 0.05) the concentration and mRNA level of SEPP1 in 1-d-old chicks. In broiler breeders, the serum and liver SEPP1 concentrations were notably increased by the use of organic Se (P < 0.05), whereas no differences were found in the kidney. Moreover, the SEPP1 mRNA level in the liver was remarkably elevated (P < 0.05) in organic Se treatments, but also no differences were observed in the kidney. Results of this study indicate that the use of organic Se (SY or SM) in maternal diets is very effective for increasing the concentration and mRNA level of SEPP1, especially in their offspring. No differences between SY and SM were observed.
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Affiliation(s)
- D Yuan
- Feed Science Institute, College of Animal Science, Zhejiang University, No. 866, Yuhangtang Road, Hangzhou 310058, People's Republic of China
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164
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Erkekoglu P, Zeybek ND, Giray BK, Rachidi W, Kızılgün M, Hininger-Favier I, Favier A, Asan E, Hincal F. The effects of di(2-ethylhexyl)phthalate on rat liver in relation to selenium status. Int J Exp Pathol 2013; 95:64-77. [PMID: 24180374 DOI: 10.1111/iep.12059] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 09/07/2013] [Indexed: 12/13/2022] Open
Abstract
This study was performed to determine the hepatotoxicity of di(2-ethylhexyl)phthalate (DEHP) in relation to selenium status. In 3-week-old Sprague-Dawley rats, selenium deficiency was induced by a ≤0.05 selenium mg/kg. A selenium supplementation group was given 1 mg selenium/kg diet for 5 weeks. Di(2-ethylhexyl)phthalate-treated groups received 1000 mg/kg dose by gavage during the last 10 days of the experiment. Histopathology, peroxisome proliferation, catalase (CAT) immunoreactivity and activity and apoptosis were assessed. Activities of antioxidant selenoenzymes [glutathione peroxidase 1 (GPx1), glutathione peroxidase 4 (GPx4), thioredoxin reductase (TrxR1)], superoxide dismutase (SOD), and glutathione S-transferase (GST); aminotransferase, total glutathione (tGSH), and lipid peroxidation (LP) levels were measured. Di(2-ethylhexyl)phthalate caused cellular disorganization while necrosis and inflammatory cell infiltration were observed in Se-deficient DEHP group (DEHP/SeD). Catalase activity and immunoreactivity were increased in all DEHP-treated groups. Glutathione peroxidase 1 and GPx4 activities decreased significantly in DEHP and DEHP/SeD groups, while GST activities decreased in all DEHP-exposed groups. Thioredoxin reductase activity increased in DEHP and DEHP/SeS, while total SOD activities increased in all DEHP-treated groups. Lipid peroxidation levels increased significantly in SeD (26%), DEHP (38%) and DEHP/SeD (71%) groups. Selenium supplementation partially ameliorated DEHP-induced hepatotoxicity; while in DEHP/SeD group, drastic changes in hepatic histopathology and oxidative stress parameters were observed.
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Affiliation(s)
- Pınar Erkekoglu
- Department of Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
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165
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Warrington JM, Kim JJM, Stahel P, Cieslar SRL, Moorehead RA, Coomber BL, Corredig M, Cant JP. Selenized milk casein in the diet of BALB/c nude mice reduces growth of intramammary MCF-7 tumors. BMC Cancer 2013; 13:492. [PMID: 24152862 PMCID: PMC4015776 DOI: 10.1186/1471-2407-13-492] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 10/08/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dietary selenium has the potential to reduce growth of mammary tumors. Increasing the Se content of cows' milk proteins is a potentially effective means to increase Se intake in humans. We investigate the effects of selenized milk protein on human mammary tumor progression in immunodeficient BALB/c nude mice. METHODS Four isonitrogenous diets with selenium levels of 0.16, 0.51, 0.85 and 1.15 ppm were formulated by mixing low- and high-selenium milk casein isolates with a rodent premix. MCF-7 cells were inoculated into the mammary fat pad of female BALB/c nude mice implanted with slow-release 17 β-estradiol pellets. Mice with palpable tumors were randomly assigned to one of the four diets for 10 weeks, during which time weekly tumor caliper measurements were conducted. Individual growth curves were fit with the Gompertz equation. Apoptotic cells and Bcl-2, Bax, and Cyclin D1 protein levels in tumors were determined. RESULTS There was a linear decrease in mean tumor volume at 70 days with increasing Se intake (P < 0.05), where final tumor volume decreased 35% between 0.16 and 1.15 ppm Se. There was a linear decrease in mean predicted tumor volume at 56, 63 and 70 days, and the number of tumors with a final volume above 500 mm3, with increasing Se intake (P < 0.05). This tumor volume effect was associated with a decrease in the proportion of tumors with a maximum growth rate above 0.03 day-1. The predicted maximum volume of tumors (Vmax) and the number of tumors with a large Vmax, were not affected by Se-casein. Final tumor mass, Bcl-2, Bax, and Cyclin D1 protein levels in tumors were not significantly affected by Se-casein. There was a significantly higher number of apoptotic cells in high-Se tumors as compared to low-Se tumors. CONCLUSIONS Taken together, these results suggest that turnover of cells in the tumor, but not its nutrient supply, were affected by dairy Se. We have shown that 1.1 ppm dietary Se from selenized casein can effectively reduce tumor progression in an MCF-7 xenograft breast cancer model. These results show promise for selenized milk protein as an effective supplement during chemotherapy.
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Affiliation(s)
| | | | | | | | | | | | | | - John P Cant
- Centre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, ON N1G 2W1, Canada.
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166
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Topological insulator bismuth selenide as a theranostic platform for simultaneous cancer imaging and therapy. Sci Rep 2013; 3:1998. [PMID: 23770650 PMCID: PMC3683666 DOI: 10.1038/srep01998] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 05/24/2013] [Indexed: 12/18/2022] Open
Abstract
Employing theranostic nanoparticles, which combine both therapeutic and diagnostic capabilities in one dose, has promise to propel the biomedical field toward personalized medicine. Here we investigate the theranostic properties of topological insulator bismuth selenide (Bi2Se3) in in vivo and in vitro system for the first time. We show that Bi2Se3 nanoplates can absorb near-infrared (NIR) laser light and effectively convert laser energy into heat. Such photothermal conversion property may be due to the unique physical properties of topological insulators. Furthermore, localized and irreversible photothermal ablation of tumors in the mouse model is successfully achieved by using Bi2Se3 nanoplates and NIR laser irradiation. In addition, we also demonstrate that Bi2Se3 nanoplates exhibit strong X-ray attenuation and can be utilized for enhanced X-ray computed tomography imaging of tumor tissue in vivo. This study highlights Bi2Se3 nanoplates could serve as a promising platform for cancer diagnosis and therapy.
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167
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Gupta R, Kazmi I, Afzal M, Khan R, Chauhan M, Al-Abbasi FA, Ahmad A, Anwar F. Combination of sulfamethoxazole and selenium in anticancer therapy: a novel approach. Mol Cell Biochem 2013; 384:279-85. [DOI: 10.1007/s11010-013-1811-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Accepted: 08/08/2013] [Indexed: 09/13/2023]
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168
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Poblaciones MJ, Rodrigo S, Santamaría O, Chen Y, McGrath SP. Agronomic selenium biofortification in Triticum durum under Mediterranean conditions: from grain to cooked pasta. Food Chem 2013; 146:378-84. [PMID: 24176357 DOI: 10.1016/j.foodchem.2013.09.070] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 09/11/2013] [Accepted: 09/12/2013] [Indexed: 11/29/2022]
Abstract
To improve the nutritional value of durum wheat and derived products, two foliar Se fertilisers (sodium selenate and selenite) were tested at four rates (0-10-20-40gha(-1)) in 2010/2011 and 2011/2012 in southwestern Spain. There was a strong and linear relationship between total Se or selenomethionine (Se-Met) accumulation in grain and Se dose for both fertilisers, although selenate was much more efficient. Se-Met was the main Se species (≈90%) of the total Se extracted from all materials. Milling caused a 27% loss of Se due to the removal of Se located in bran and germ. In the pasta making process and the cooking process the loss of Se, mainly as selenite, was about 7%. Durum wheat may be a good candidate to be included in Se biofortification programs under rainfed Mediterranean conditions, as foodstuffs derived from it could efficiently increase the Se content in the human diet.
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Affiliation(s)
- M J Poblaciones
- Department of Agronomy and Forest Environment Engineering, University of Extremadura Avda., Adolfo Suárez s/n, 06007 Badajoz, Spain.
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169
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Effects of sodium selenite on the decreased percentage of T cell subsets, contents of serum IL-2 and IFN-γ induced by aflatoxin B1 in broilers. Res Vet Sci 2013; 95:143-5. [DOI: 10.1016/j.rvsc.2013.02.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 02/20/2013] [Accepted: 02/27/2013] [Indexed: 11/21/2022]
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170
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Font M, Lizarraga E, Ibáñez E, Plano D, Sanmartín C, Palop JA. Structural variations on antitumour agents derived from bisacylimidoselenocarbamate. A proposal for structure–activity relationships based on the analysis of conformational behaviour. Eur J Med Chem 2013; 66:489-98. [DOI: 10.1016/j.ejmech.2013.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/31/2013] [Accepted: 06/01/2013] [Indexed: 01/18/2023]
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171
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Shokrzadeh M, Ahangar N, Abdollahi M, Shadboorestan A, Omidi M, Payam SH. Potential chemoprotective effects of selenium on diazinon-induced DNA damage in rat peripheral blood lymphocyte. Hum Exp Toxicol 2013; 32:759-65. [DOI: 10.1177/0960327112468179] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The purpose of this study was to investigate the protective effects of selenium (Se) against genotoxicity induced by diazinon (DZN) in rat peripheral blood lymphocytes by micronucleus (MN) test. Animals were concurrently administered intraperitoneally with DZN in proper solvent (20 mg/kg body weight (b.w.)) and Se at three different doses (0.5, 1, and 2 mg/kg b.w.) for 30 consecutive days. The positive control group received DZN at the same dose without Se. After 24 h of last injection, 0.5 ml blood of each rat was received and cultured in culture medium for 44 h. The lymphocyte cultures were mitogenically stimulated with cytochalasin B to allow the evaluation of number of MNs in cytokinesis-blocked binucleated cells. Incubation of lymphocytes with DZN induced additional genotoxicity and is shown by increase in MNs frequency in human lymphocytes. Se at low dose of 0.5 mg/kg had a maximum effect and significantly reduced the MNs frequency in cultured lymphocytes ( p < 0.0001) that reduced the frequency of MN from 12.78 ± 0.24% for DZN group to 4.40 ± 0.36. The present study revealed that Se particularly at low doses has a potent antigenotoxic effect against DZN -induced toxicity in rats, which may be due to the scavenging of free radicals and increased antioxidant status.
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Affiliation(s)
- M. Shokrzadeh
- Pharmaceutical Sciences Research Center, Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Islamic Republic of Iran
| | - N. Ahangar
- Pharmaceutical Sciences Research Center, Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Islamic Republic of Iran
| | - M. Abdollahi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - A. Shadboorestan
- Pharmaceutical Sciences Research Center, Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Islamic Republic of Iran
| | - M. Omidi
- Pharmaceutical Sciences Research Center, Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Islamic Republic of Iran
| | - S.S Hosseini Payam
- Pharmaceutical Sciences Research Center, Department of Toxicology and Pharmacology, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Islamic Republic of Iran
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172
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Banji D, Banji OJF, Reddy M, Annamalai AR. Impact of zinc, selenium and lycopene on capsaicin induced mutagenicity and oxidative damage in mice. J Trace Elem Med Biol 2013; 27:230-5. [PMID: 23380154 DOI: 10.1016/j.jtemb.2013.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 12/13/2012] [Accepted: 01/05/2013] [Indexed: 11/17/2022]
Abstract
Capsaicin is employed as a condiment and colorant in the cosmetic and pharmaceutical industries. Metabolism of capsaicin produces reactive phenoxy radicals, which inflict damage to DNA. Micronutrients such as zinc and selenium facilitate the expression of tissue repair factors, and lycopene has natural antioxidant action. The current study investigated the possible protective role of zinc, selenium and lycopene singly and in combination in ameliorating capsaicin induced mutagenicity. Fifty four Swiss albino mice received the vehicle, zinc (10 mg/kg), selenium (2 mg/kg), lycopene (2 mg/kg) alone, capsaicin alone (2 mg/kg), and capsaicin along with zinc (10mg/kg), selenium (2 mg/kg) and lycopene (2 mg/kg) in combination by the oral route for 32 days. Animals were killed 24 h after the last treatment, and micronuclei formation in bone marrow and peripheral blood were assessed. Antioxidant status in plasma, the total protein, nucleic acids, and DNA fragmentation was assessed in the liver homogenate. Capsaicin substantially damaged nuclear material and increased oxidative stress. Individual therapy with lycopene was most effective in reducing micronuclei formation, lipid peroxidation, and in augmenting ferric reducing ability of plasma. This was closely followed by zinc and selenium. Zinc protected against DNA fragmentation followed by lycopene and selenium. The combination therapy was effective over individual treatment against DNA fragmentation, micronuclei and malondialdehyde formation. The combination did not exert a substantial benefit over individual therapy in enhancing the total antioxidant ability of plasma. The risk of capsaicin induced mutagenicity was lowered with the combination by reducing the generation of free radicals and by enhancing tissue repair.
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Affiliation(s)
- David Banji
- Department of Pharmacology and Toxicology, Nalanda College of Pharmacy, Cherlapally, Nalgonda 508001, A.P., India.
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173
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Chen K, Shu G, Peng X, Fang J, Cui H, Chen J, Wang F, Chen Z, Zuo Z, Deng J, Geng Y, Lai W. Protective role of sodium selenite on histopathological lesions, decreased T-cell subsets and increased apoptosis of thymus in broilers intoxicated with aflatoxin B₁. Food Chem Toxicol 2013; 59:446-54. [PMID: 23810797 DOI: 10.1016/j.fct.2013.06.032] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 06/16/2013] [Accepted: 06/18/2013] [Indexed: 01/15/2023]
Abstract
For evaluating the ability of selenium (Se) in counteracting the adverse effects of aflatoxin B₁ (AFB₁), two hundred 1-day-old male Avian broilers, divided into five groups, were fed with basal diet (control group), 0.3 mg/kg AFB₁ (AFB₁ group), 0.3 mg/kg AFB₁+0.2 mg/kg Se (+Se group I), 0.3mg/kg AFB₁+0.4 mg/kg Se (+Se group II) and 0.3mg/kg AFB₁+0.6 mg/kg Se (+Se group III), respectively. Compared with control group, the decreased relative weight of thymus and percentages of mature thymocytes, congestion in medulla and much debris in cortex of thymus, and the increased apoptotic thymocytes were observed in AFB1 group. However, supplied dietary sodium selenite could increase the relative weight of thymus and percentages of mature thymocytes, and alleviate histopathological lesions. Compared with AFB1 group, the percentages of apoptotic thymocytes detected by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling method and flow cytometry method in three +Se groups were decreased, the expression of Caspase-3 and Bax, through quantitative real-time PCR and immunohistochemical method, in three +Se groups were decreased, while the expression of Bcl-2 was increased. The results indicate that sodium selenite supplied in the diet, through a mechanism of apoptosis regulation, may ameliorated AFB₁-induced lesions of thymus and accordingly improve the impaired cellular immune function.
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Affiliation(s)
- Kejie Chen
- Key Laboratory of Animal Diseases and Environmental Hazards of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Ya'an, Sichuan 625014, China
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174
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JANAKIRAM NAVEENAB, MOHAMMED ALTAF, RAVILLAH DURGADEVI, CHOI CHANGIN, ZHANG YUTING, DESAI DHIMANT, AMIN SHANTU, RAO CHINTHALAPALLYV. Chemopreventive effects of PBI-Se, a selenium-containing analog of PBIT, on AOM-induced aberrant crypt foci in F344 rats. Oncol Rep 2013; 30:952-60. [DOI: 10.3892/or.2013.2483] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 03/26/2013] [Indexed: 11/06/2022] Open
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175
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Is selenium a potential treatment for cancer metastasis? Nutrients 2013; 5:1149-68. [PMID: 23567478 PMCID: PMC3705340 DOI: 10.3390/nu5041149] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 03/21/2013] [Accepted: 03/22/2013] [Indexed: 12/01/2022] Open
Abstract
Selenium (Se) is an essential micronutrient that functions as a redox gatekeeper through its incorporation into proteins to alleviate oxidative stress in cells. Although the epidemiological data are somewhat controversial, the results of many studies suggest that inorganic and organic forms of Se negatively affect cancer progression, and that several selenoproteins, such as GPXs, also play important roles in tumor development. Recently, a few scientists have examined the relationship between Se and metastasis, a late event in cancer progression, and have evaluated the potential of Se as an anti-angiogenesis or anti-metastasis agent. In this review, we present the current knowledge about Se compounds and selenoproteins, and their effects on the development of metastasis, with an emphasis on cell migration, invasion, and angiogenesis. In the cancers of breast, prostate, colorectal, fibrosarcoma, melanoma, liver, lung, oral squamous cell carcinoma, and brain glioma, there is either clinical evidence linking selenoproteins, such as thioredoxin reductase-1 to lymph node metastasis; in vitro studies indicating that Se compounds and selenoproteins inhibited cell motility, migration, and invasion, and reduced angiogenic factors in some of these cancer cells; or animal studies showing that Se supplementation resulted in reduced microvessel density and metastasis. Together, these data support the notion that Se may be an anti-metastastatic element in addition to being a cancer preventative agent.
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176
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Selenium and prostate cancer prevention: insights from the selenium and vitamin E cancer prevention trial (SELECT). Nutrients 2013; 5:1122-48. [PMID: 23552052 PMCID: PMC3705339 DOI: 10.3390/nu5041122] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/11/2013] [Accepted: 03/19/2013] [Indexed: 12/31/2022] Open
Abstract
The Selenium and Vitamin E Cancer Prevention Trial (SELECT) was conducted to assess the efficacy of selenium and vitamin E alone, and in combination, on the incidence of prostate cancer. This randomized, double-blind, placebo-controlled, 2 × 2 factorial design clinical trial found that neither selenium nor vitamin E reduced the incidence of prostate cancer after seven years and that vitamin E was associated with a 17% increased risk of prostate cancer compared to placebo. The null result was surprising given the strong preclinical and clinical evidence suggesting chemopreventive activity of selenium. Potential explanations for the null findings include the agent formulation and dose, the characteristics of the cohort, and the study design. It is likely that only specific subpopulations may benefit from selenium supplementation; therefore, future studies should consider the baseline selenium status of the participants, age of the cohort, and genotype of specific selenoproteins, among other characteristics, in order to determine the activity of selenium in cancer prevention.
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177
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Chouhan S, Kushwaha P, Kaul R, Flora SJ. Co-administration of selenium but not iron prevents fluoride toxicity in rats. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bionut.2012.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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178
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Composition and distribution of the main active components in selenium-enriched fruit bodies of Cordyceps militaris link. Food Chem 2013. [DOI: 10.1016/j.foodchem.2012.10.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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179
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Fang KM, Cheng FC, Huang YL, Chung SY, Jian ZY, Lin MC. Trace element, antioxidant activity, and lipid peroxidation levels in brain cortex of gerbils after cerebral ischemic injury. Biol Trace Elem Res 2013; 152:66-74. [PMID: 23334863 DOI: 10.1007/s12011-012-9596-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 12/27/2012] [Indexed: 01/22/2023]
Abstract
Proper trace element level and antioxidant enzyme activity are crucial for the brain in maintaining normal neurological functions. To our knowledge, alteration of lipid peroxidation status, trace element level, and antioxidant activity in the homogenates of brain cortex after cerebral ischemia in gerbil, however, has not been investigated so far. Male Mongolian gerbils were divided into control and ischemic subjects. Cerebral ischemia was induced by occlusion of the right middle cerebral artery and right common carotid artery for 1 h. Experimental results showed that a significant increase (P < 0.01) of the malondialdehyde level was found in the ischemic brain as compared with the control group. Trace element analysis indicated that a remarkable elevation (P < 0.01) of the level of iron (Fe), chromium (Cr), and a statistical decrease of selenium (Se) and zinc (Zn) (P < 0.05) concentration were observed in the ischemic brain as compared with the control subject. No significant change (P > 0.05) of the copper (Cu) level was found in both experimental groups. Additionally, antioxidant activity of superoxide dismutase (P < 0.01) and catalase (P < 0.05) was significantly decreased in the ischemic brain as compared with the control subject. Taking all results together, it is conceivable to manifest the experimental findings that cerebral ischemia not only may result in an enhanced oxidative stress but also may lead to further oxidative injury. Moreover, disturbance of trace element level combined with declined antioxidant activity seems to play a significant role in responsible for the etiology of cerebral ischemia.
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Affiliation(s)
- Kwang-Ming Fang
- Department of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, No.666, Buzih Road, Beitun District, Taichung 406, Taiwan
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180
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Rahman MM, Seo YR. Discovery of potential targets of selenomethionine-mediated chemoprevention in colorectal carcinoma mouse model using proteomics analysis. Carcinogenesis 2013; 34:1575-84. [PMID: 23504501 DOI: 10.1093/carcin/bgt078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Despite some controversy, selenomethionine (SeMet)-mediated protection against colorectal cancer (CRC) might be a very promising non-cytotoxic option. However, responsive molecular targets and underlying mechanisms of SeMet-mediated chemoprevention are still unclear. Our aim was to discover new targets of SeMet-mediated chemoprevention in CRC using proteomics analysis. We found dietary SeMet supplementation before carcinoma initiation effectively suppressed polyp incidence and dysplastic lesions without any adverse effects. To determine chemopreventive targets of SeMet, we employed two-dimensional gel electrophoresis-based proteomics analysis in CRC mouse model. Pretreatment with SeMet apparently modulated the expression of 30 proteins with functions in major processes like chronic inflammation, oxidative stress and apoptosis as discovered through pathway analysis with Pathway Studio software. We validated four proteins selected from pathway analysis including prohibitin, purine nucleoside phosphorylase, annexin 2 and c-reactive protein by immunohistochemistry. 8-Hydroxy-2'-deoxyguanosine (8-OHdG), a known oxidative stress marker, was decreased by SeMet treatment in CRC mice as seen by immunohistochemistry. Further network analysis was done among these new four validated proteins, 8-OHdG and colorectal cancer. These four proteins found by proteomics analysis might be considered as potential chemopreventive biomarkers of SeMet against colon cancer and can help develop and improve approaches in preventive, therapeutic and prognostic aspects.
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Affiliation(s)
- Md Mujibur Rahman
- Department of Life Science, Dongguk University-Seoul, 26 Pil-dong 3-ga, Jung-gu, Seoul 100-715, Republic of Korea
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181
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Mehdi Y, Hornick JL, Istasse L, Dufrasne I. Selenium in the environment, metabolism and involvement in body functions. Molecules 2013; 18:3292-311. [PMID: 23486107 PMCID: PMC6270138 DOI: 10.3390/molecules18033292] [Citation(s) in RCA: 364] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/05/2013] [Accepted: 03/07/2013] [Indexed: 11/16/2022] Open
Abstract
Selenium (Se³⁴₇₉) is a metalloid which is close to sulfur (S) in terms of properties. The Se concentration in soil varies with type, texture and organic matter content of the soil and with rainfall. Its assimilation by plants is influenced by the physico-chemical properties of the soil (redox status, pH and microbial activity). The presence of Se in the atmosphere is linked to natural and anthropogenic activities. Selenoproteins, in which selenium is present as selenocysteine, present an important role in many body functions, such as antioxidant defense and the formation of thyroid hormones. Some selenoprotein metabolites play a role in cancer prevention. In the immune system, selenium stimulates antibody formation and activity of helper T cells, cytotoxic T cells and Natural Killer (NK) cells. The mechanisms of intestinal absorption of selenium differ depending on the chemical form of the element. Selenium is mainly absorbed in the duodenum and caecum by active transport through a sodium pump. The recommended daily intake of selenium varies from 60 μg/day for women, to 70 μg/day for men. In growing ruminants the requirements are estimated at 100 μg/kg dry matter and 200 μg/Kg for pregnant or lactating females. A deficiency can cause reproductive disorders in humans and animals.
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Affiliation(s)
- Youcef Mehdi
- ULg-FMV, Nutrition Unit, Department of Animal Production, Boulevard de Colonster 20, Bât. B43 4000, Liège, Belgium.
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182
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Chen X, Cai K, Fang J, Lai M, Hou Y, Li J, Luo Z, Hu Y, Tang L. Fabrication of selenium-deposited and chitosan-coated titania nanotubes with anticancer and antibacterial properties. Colloids Surf B Biointerfaces 2013. [DOI: 10.1016/j.colsurfb.2012.10.022] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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183
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Slusarczyk J, Malinowska E, Krzyczkowski W, Kuraś M. Influence of inorganic and organic selenium on number of living mycelial cells and their ultrastructure in culture of Hericium erinaceum (Bull.: Fr. Pers.). ACTA BIOLOGICA HUNGARICA 2013; 64:96-105. [PMID: 23567834 DOI: 10.1556/abiol.64.2013.1.9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mycelium of the white-rot fungus (Hericium erinaceum (Bull.: Fr. Pers.) produces polysaccharides showing anticancer and immunostimulating activity. In our previous works, we have shown that organic selenitetriglycerides (Selol) contribute to the increase of biosynthesis of exopolysaccharides (EPS) having antioxidative properties and containing large amounts of selenium. The present work is a study of influence of inorganic and organic form of selenium on viability of H. erinaceum mycelium and on ultrastructural changes taking place during its development in submerged culture. The mycelium was grown on media containing sodium selenite (Na2SeO3), a mixture of Na2SeO3 + Selol2% and on control medium (no selenium added). It was shown that mycelium cultured for 3 days in control conditions on standard media contained almost 100% of living cells, with over 80% after 24 days. Treatment with 100 ppm of Na2SeO3 lowered the number of viable cells to 11.8% and 9.1% after 3 and 24 days, respectively. The addition of 2% Selol caused the amounts of living cells to remain at ca 90%. Apparently, Selol helped the cells to cope with the toxic activity of inorganic selenium ions. The addition of sodium selenite induced degradative changes in cell organelles. Such changes were not observed in the case of Na2SeO3 + Selol mixture, in which case cells contained numerous ribosomes and small lipid bodies.
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Affiliation(s)
- Joanna Slusarczyk
- Department of Ecology and Environmental Protection, Jan Kochanowski University, Świętokrzyska, Poland.
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184
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Mahn A, Reyes A. An overview of health-promoting compounds of broccoli (Brassica oleracea var. italica) and the effect of processing. FOOD SCI TECHNOL INT 2013; 18:503-14. [PMID: 23175779 DOI: 10.1177/1082013211433073] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Broccoli offers many heath-promoting properties owing to its content of antioxidant and anticarcinogenic compounds. The concentration and bioavailability of polyphenols, glucosinolates, sulforaphane and selenium depend on plant biochemistry, cultivation strategy and type of processing. In this article, the main biochemical properties of broccoli are reviewed regarding their health-promoting effects. Additionally, the way these properties are affected by processing is discussed. Steaming and drying result in an apparent increment of sulforaphane content as well as antioxidant activity, most likely due to an increase of the extractability of antioxidants and sulforaphane. Freezing and boiling diminish polyphenols concentration, mainly due to volatilization and leaching into the cooking water. In view of these results, the optimization of broccoli processing in order to maximize the content of bioactive compounds should be possible. The effect of processing on selenium compounds has been poorly studied so far, and therefore this topic should be investigated in the future. Finally, the effect of operating conditions in different drying processes on the content of bioactive compounds in broccoli should be investigated in a greater depth.
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Affiliation(s)
- Andrea Mahn
- Universidad de Santiago de Chile, Santiago, Chile.
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185
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Selenium in bone health: roles in antioxidant protection and cell proliferation. Nutrients 2013; 5:97-110. [PMID: 23306191 PMCID: PMC3571640 DOI: 10.3390/nu5010097] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 12/17/2012] [Accepted: 01/03/2013] [Indexed: 12/25/2022] Open
Abstract
Selenium (Se) is an essential trace element for humans and animals, and several findings suggest that dietary Se intake may be necessary for bone health. Such findings may relate to roles of Se in antioxidant protection, enhanced immune surveillance and modulation of cell proliferation. Elucidation of the mechanisms by which Se supports these cellular processes can lead to a better understanding of the role of this nutrient in normal bone metabolism. This article reviews the current knowledge concerning the molecular functions of Se relevant to bone health.
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186
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Weekley CM, Harris HH. Which form is that? The importance of selenium speciation and metabolism in the prevention and treatment of disease. Chem Soc Rev 2013; 42:8870-94. [DOI: 10.1039/c3cs60272a] [Citation(s) in RCA: 371] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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187
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Chen P, Wang L, Li N, Liu Q, Ni J. Comparative proteomics analysis of sodium selenite-induced apoptosis in human prostate cancer cells. Metallomics 2013; 5:541-50. [DOI: 10.1039/c3mt00002h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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188
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Németh A, García Reyes JF, Kosáry J, Dernovics M. The relationship of selenium tolerance and speciation in Lecythidaceae species. Metallomics 2013; 5:1663-73. [DOI: 10.1039/c3mt00140g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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189
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Han X, Li J, Brasky TM, Xun P, Stevens J, White E, Gammon MD, He K. Antioxidant intake and pancreatic cancer risk: the Vitamins and Lifestyle (VITAL) Study. Cancer 2012; 119:1314-20. [PMID: 23280534 DOI: 10.1002/cncr.27936] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 10/30/2012] [Accepted: 11/02/2012] [Indexed: 12/22/2022]
Abstract
BACKGROUND Oxidative stress causes damage to many components of human cells (ie, proteins, lipids, and DNA) and is involved in carcinogenesis. Nutrients with antioxidant properties may protect against oxidative stress. In this study, the authors examined the intake of antioxidants from diet and supplements in relation to pancreatic cancer risk among participants of the Vitamins and Lifestyle (VITAL) Study. METHODS The participants included 77,446 men and women ages 50 to 76 years who were residents of western Washington State and who completed a baseline questionnaire between 2000 and 2002. Participants reported usual diet over the past year and use of supplements over the past 10 years in addition to demographic and lifestyle factors. During a median follow-up of 7.1 years, 184 participants developed pancreatic adenocarcinoma. Cox proportional hazards models were used to estimate multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for 7 antioxidants: β-carotene, lutein plus zeaxanthin, lycopene, vitamin C, vitamin E, selenium, and zinc. RESULTS An inverse association was observed between dietary selenium and the risk of pancreatic cancer (medium vs low intake: HR, 0.58; 95% CI, 0.35-0.94; high vs low intake: HR, 0.44; 95% CI, 0.23-0.85; Ptrend = .01); however, when supplemental and dietary exposures were combined, the association was no longer statistically significant. CONCLUSIONS Dietary selenium intake was inversely associated with the risk of pancreatic cancer, and the observed association was attenuated by selenium supplementation.
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Affiliation(s)
- Xuesong Han
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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190
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Seng HL, Tiekink ERT. Anti-cancer potential of selenium- and tellurium-containing species: opportunities abound! Appl Organomet Chem 2012. [DOI: 10.1002/aoc.2928] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hoi-Ling Seng
- Department of Chemistry; University of Malaya; 50603 Kuala Lumpur Malaysia
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191
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Kolachi NF, Kazi TG, Afridi HI, Kazi NG, Khan S. Investigation of essential trace and toxic elements in biological samples (blood, serum and scalp hair) of liver cirrhotic/cancer female patients before and after mineral supplementation. Clin Nutr 2012; 31:967-73. [DOI: 10.1016/j.clnu.2012.04.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 04/19/2012] [Accepted: 04/24/2012] [Indexed: 11/24/2022]
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192
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Dietary derived compounds in cancer chemoprevention. Contemp Oncol (Pozn) 2012; 16:394-400. [PMID: 23788916 PMCID: PMC3687449 DOI: 10.5114/wo.2012.31767] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 07/25/2011] [Accepted: 08/09/2011] [Indexed: 01/10/2023] Open
Abstract
Cancer chemoprevention is defined as the application of natural or synthetic agents to suppress or reverse cancer development and progression. In this field especially diet derived compounds have recently attracted researchers' attention as potential therapeutics generally exerting low toxicity compared with regular drugs. This review presents a survey of recent findings concerning the most promising dietary chemopreventive agents such as green tea polyphenols (i.e. catechins), long-chain polyunsaturated fatty acids, carotenoids, glucosinolates/isothiocyanates, vitamins (i.e. vitamin D and folate) and minerals (i.e. calcium and selenium). Molecular targets involved in intrinsic pathways affected by these natural compounds are also shortly discussed.
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193
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Méplan C, Rohrmann S, Steinbrecher A, Schomburg L, Jansen E, Linseisen J, Hesketh J. Polymorphisms in thioredoxin reductase and selenoprotein K genes and selenium status modulate risk of prostate cancer. PLoS One 2012; 7:e48709. [PMID: 23133653 PMCID: PMC3486803 DOI: 10.1371/journal.pone.0048709] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 10/03/2012] [Indexed: 11/27/2022] Open
Abstract
Increased dietary intake of Selenium (Se) has been suggested to lower prostate cancer mortality, but supplementation trials have produced conflicting results. Se is incorporated into 25 selenoproteins. The aim of this work was to assess whether risk of prostate cancer is affected by genetic variants in genes coding for selenoproteins, either alone or in combination with Se status. 248 cases and 492 controls from an EPIC-Heidelberg nested case-control study were subjected to two-stage genotyping with an initial screening phase in which 384 tagging-SNPs covering 72 Se-related genes were determined in 94 cases and 94 controls using the Illumina Goldengate methodology. This analysis was followed by a second phase in which genotyping for candidate SNPs identified in the first phase was carried out in the full study using Sequenom. Risk of high-grade or advanced stage prostate cancer was modified by interactions between serum markers of Se status and genotypes for rs9880056 in SELK, rs9605030 and rs9605031 in TXNRD2, and rs7310505 in TXNRD1. No significant effects of SNPs on prostate cancer risk were observed when grade or Se status was not taken into account. In conclusion, the risk of high-grade or advanced-stage prostate cancer is significantly altered by a combination of genotype for SNPs in selenoprotein genes and Se status. The findings contribute to explaining the biological effects of selenium intake and genetic factors in prostate cancer development and highlight potential roles of thioredoxin reductases and selenoprotein K in tumour progression.
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Affiliation(s)
- Catherine Méplan
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom
- Human Nutrition Research Centre, Newcastle University, Newcastle-upon-Tyne, United Kingdom
| | - Sabine Rohrmann
- Division of Cancer Epidemiology and Prevention, Institute of Social and Preventive Medicine, University of Zurich, Zurich, Switzerland
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - Astrid Steinbrecher
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - Lutz Schomburg
- Institute for Experimental Endocrinology, Charité - University Medicine Berlin, Berlin, Germany
| | - Eugène Jansen
- Laboratory for Health Protection Research, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Jakob Linseisen
- Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
- Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany
| | - John Hesketh
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom
- Human Nutrition Research Centre, Newcastle University, Newcastle-upon-Tyne, United Kingdom
- * E-mail:
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194
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Abstract
The discovery of multiple selenoproteins has raised tantalizing questions about their role in maintaining normal cellular function. Unfortunately, many of these remain inadequately investigated. While they have a role in maintaining redox balance, other functions are becoming increasingly recognized. As the roles of these selenoproteins are further characterized, a better understanding of the true physiological significance of this trace element will arise. This knowledge will be essential in defining optimum intakes to achieve cellular homeostasis in order to optimize health, including a reduction in cancer, for diverse populations. Human variation in the response to selenium likely reflects significant interactions between the type and amounts of selenium consumed with the genome and a host of environmental factors including the totality of the diet, as discussed in this review.
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Affiliation(s)
- Cindy D. Davis
- Nutritional Science Research Group, National Cancer Institute, Rockville, Maryland 20892;,
- Current address: Office of Dietary Supplements, National Institutes of Health, Rockville, Maryland 20892
| | - Petra A. Tsuji
- Department of Biological Sciences, Towson University, Towson, Maryland 21252
| | - John A. Milner
- Nutritional Science Research Group, National Cancer Institute, Rockville, Maryland 20892;,
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195
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Nunes RGFL, Luz JMRD, Freitas RDB, Higuchi A, Kasuya MCM, Vanetti MCD. Selenium Bioaccumulation in Shiitake Mushrooms: A Nutritional Alternative Source of this Element. J Food Sci 2012; 77:C983-6. [DOI: 10.1111/j.1750-3841.2012.02837.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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196
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Zeng H, Cheng WH, Johnson LK. Methylselenol, a selenium metabolite, modulates p53 pathway and inhibits the growth of colon cancer xenografts in Balb/c mice. J Nutr Biochem 2012; 24:776-80. [PMID: 22841391 DOI: 10.1016/j.jnutbio.2012.04.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 04/10/2012] [Accepted: 04/13/2012] [Indexed: 01/06/2023]
Abstract
It is has been hypothesized that methylselenol is a critical selenium metabolite for anticancer activity in vivo. In this study, we used a protein array which contained 112 different antibodies known to be involved in the p53 pathway to investigate the molecular targets of methylselenol in human HCT116 colon cancer cells. The array analysis indicated that methylselenol exposure changed the expression of 11 protein targets related to the regulation of cell cycle and apoptosis. Subsequently, we confirmed these proteins with the Western blotting approach, and found that methylselenol increased the expression of GADD 153 and p21 but reduced the level of c-Myc, E2F1 and Phos p38 MAP kinase. Similar to our previous report on human HCT116 colon cancer cells, methylselenol also inhibited cell growth and led to an increase in G1 and G2 fractions with a concomitant drop in S-phase in mouse colon cancer MC26 cells. When the MC26 cells were transplanted to their immune-competent Balb/c mice, methylselenol-treated MC26 cells had significantly less tumor growth potential than that of untreated MC26 cells. Taken together, our data suggest that methylselenol modulates the expression of key genes related to cell cycle and apoptosis and inhibits colon cancer cell proliferation and tumor growth.
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Affiliation(s)
- Huawei Zeng
- US Department of Agriculture, Agricultural Research Service, Grand Forks Human Nutrition Research Center, Grand Forks, ND 58203, USA.
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197
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Park JS, Ryu JY, Jeon HK, Cho YJ, Park YA, Choi JJ, Lee JW, Kim BG, Bae DS. The effects of selenium on tumor growth in epithelial ovarian carcinoma. J Gynecol Oncol 2012; 23:190-6. [PMID: 22808362 PMCID: PMC3395015 DOI: 10.3802/jgo.2012.23.3.190] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 04/09/2012] [Accepted: 04/09/2012] [Indexed: 11/30/2022] Open
Abstract
Objective Epidemiological studies suggest that selenium protects against the development of several cancers. Selenium (sodium selenite) has been reported to interfere with cell growth and proliferation, and to induce cell death. In this study, we tested whether selenium could have growth-inhibiting effect in ovarian cancer cells and an orthotopic animal model. Methods Cell growth in selenium-treated cells was determined in human ovarian cancer cells, A2780, HeyA8, and SKOV3ip1 using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide (MTT) assay. Animal experiment of selenium with paclitaxel was performed using SKOV3ip1 cells in nude mice to evaluate their inhibiting effect for tumor growth. In addition, another animal experiment of paclitaxel with or without selenium was performed to assess the effect of survival and food intake in mice. Results The in vitro growth of selenium-treated cells was significantly decreased dose-dependently in A2780, HeyA8, and SKOV3ip1 cells. Therapy experiment in mice was started 1 week after injection of the SKOV3ip1 cells. Treatment with selenium (1.5 mg/kg, 3 times/week) and paclitaxel injection showed no addictive effect of the inhibition of tumor growth. However, combination of selenium and paclitaxel showed the slightly increased food intake compared with paclitaxel alone. Conclusion Although selenium has growth-inhibiting effect in ovarian carcinoma cells in vitro, there is no additive effect on tumor growth in mice treated with combination of paclitaxel and selenium. However, food intake is slightly higher in selenium-treated mice during chemotherapy.
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Affiliation(s)
- Jin Sun Park
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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198
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Selenium nanoparticles inhibit the growth of HeLa and MDA-MB-231 cells through induction of S phase arrest. Colloids Surf B Biointerfaces 2012; 94:304-8. [DOI: 10.1016/j.colsurfb.2012.02.006] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 02/04/2012] [Accepted: 02/06/2012] [Indexed: 11/18/2022]
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199
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Carey AM, Scheckel KG, Lombi E, Newville M, Choi Y, Norton GJ, Price AH, Meharg AA. Grain accumulation of selenium species in rice (Oryza sativa L.). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:5557-64. [PMID: 22502742 DOI: 10.1021/es203871j] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Efficient Se biofortification programs require a thorough understanding of the accumulation and distribution of Se species within the rice grain. Therefore, the translocation of Se species to the filling grain and their spatial unloading were investigated. Se species were supplied via cut flag leaves of intact plants and excised panicle stems subjected to a ± stem-girdling treatment during grain fill. Total Se concentrations in the flag leaves and grain were quantified by inductively coupled plasma mass spectrometry. Spatial accumulation was investigated using synchrotron X-ray fluorescence microtomography. Selenomethionine (SeMet) and selenomethylcysteine (SeMeSeCys) were transported to the grain more efficiently than selenite and selenate. SeMet and SeMeSeCys were translocated exclusively via the phloem, while inorganic Se was transported via both the phloem and xylem. For SeMet- and SeMeSeCys-fed grain, Se dispersed throughout the external grain layers and into the endosperm and, for SeMeSeCys, into the embryo. Selenite was retained at the point of grain entry. These results demonstrate that the organic Se species SeMet and SeMeSeCys are rapidly loaded into the phloem and transported to the grain far more efficiently than inorganic species. Organic Se species are distributed more readily, and extensively, throughout the grain than selenite.
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Affiliation(s)
- Anne-Marie Carey
- Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, Aberdeen AB24 3UU, United Kingdom
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Kojouri GA, Sadeghian S, Mohebbi A, Mokhber Dezfouli MR. The effects of oral consumption of selenium nanoparticles on chemotactic and respiratory burst activities of neutrophils in comparison with sodium selenite in sheep. Biol Trace Elem Res 2012; 146:160-6. [PMID: 22105658 PMCID: PMC3310134 DOI: 10.1007/s12011-011-9241-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 10/17/2011] [Indexed: 11/02/2022]
Abstract
The present study was designed to compare the effects of nano-selenium and of sodium selenite on the chemotactic and respiratory burst activities of neutrophils in sheep. Fifteen sheep were randomly divided into three groups. Groups 1 and 2 received selenium nanoparticles (1 mg/kg) or sodium selenite (1 mg/kg) orally, respectively, for ten consecutive days, and the third group was considered as the control. To determine the chemotactic and respiratory burst activities of the neutrophils, the leading front assay and the NBT test were used on heparinized blood samples that were collected at different intervals (days 0, 10th, 20th, and 30th). The results obtained showed that the chemotactic activities in groups 1 and 2 increased significantly on the 10th, 20th, and 30th day, compared to day 0, and on the 20th day in comparison with the 10th day, while in group 2, there was a significant decrease on the 30th day compared to the 20th day. The chemotactic activities in group 1 were significantly higher than in group 2 on the 10th day and in the control group on the 10th, 20th, and 30th day, but the chemotactic activities in group 2 were significantly higher than those in the control group only on the 20th day. On the 30th day into the experiment, the respiratory bursts in groups 1 and 2 were significantly stronger in comparison with those at day 0. Overall, nano-selenium increased the chemotactic and respiratory burst activities more significantly than sodium selenite, which is suggestive of a stronger stimulatory effect of the Se nanoparticles on intracellular activities.
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Affiliation(s)
- Gholam Ali Kojouri
- Department of Clinical Science, Faculty of Veterinary Medicine, University of Shahrekord, Shahrekord, Iran
| | - Sirous Sadeghian
- Department of Clinical Science, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Abdonnaser Mohebbi
- Department of Clinical Science, Faculty of Veterinary Medicine, University of Shahrekord, Shahrekord, Iran
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