Μg Selenium Research Articles

Brazil Nut (Bertholletia excelsa H.B.K.) Consumption in Energy-Restricted Intervention Decreases Proinflammatory Markers and Intestinal Permeability of Women with Overweight/Obesity: A Controlled Trial (Brazilian Nuts Study)

BackgroundObesity is associated with low-grade inflammation and increased intestinal permeability (IP). The Brazil nut (BN) (Bertholletia excelsa H.B.K.) appears to be a promising dietary intervention to control inflammation by enhancing antioxidant defenses. ObjectivesWe aimed to assess the effect of daily BN consumption on inflammatory biomarkers and IP in the context of an energy-restricted intervention. Furthermore, we evaluated the correlation between the changes in these inflammatory markers and the changes in serum selenium and IP. MethodsIn this 8-wk nonrandomized controlled trial, 56 women with overweight or obesity were allocated into 2 groups, both following an energy-restricted diet (−500 kcal/d). The control group (CO) consumed a nut-free diet, while the BN group consumed 8 g BN/d, providing 347.2 μg selenium (Se). Inflammatory cytokines were analyzed in plasma and Se in serum. IP was assessed using the lactulose/mannitol test (LM ratio). ResultsForty-six women completed the intervention. Both groups achieved similar energy restriction (CO Δ= −253.7 ± 169.4 kcal/d; BN Δ= −265.8 ± 141.8 kcal/d) and weight loss (CO Δ= −2.5 ± 0.5 kg; BN Δ= −3.5 ± 0.5 kg). The BN group showed lower values of C-reactive protein, tumor necrosis factor, interleukin (IL)1-β, IL-8, percentage lactulose excretion, and LM ratio than the CO group. Additionally, changes in serum Se concentration were predictive of changes in IL-8 concentration (β: −0.054; adjusted R2: 0.100; 95% confidence interval [CI]: −0.100; −0.007; P = 0.025), and changes in IL-8 were predictive of changes in the LM ratio (β: 0.006; adjusted R2: 0.101; 95% CI: 0.001, 0.011; P = 0.024). ConclusionsRegular intake of BNs can be a promising complementary dietary strategy for controlling low-grade inflammation and improving IP in women with overweight/obesity undergoing energy-restricted treatment. However, the effects of BNs seem to be Se status-dependent.This trial was registered at the Brazilian Registry of Clinical Trials (ReBEC: https://ensaiosclinicos.gov.br/rg/RBR-3ntxrm/.

Enhancing Endothelial Function with Nutrient-Enriched Table Hen Eggs: A Randomized Study in Patients Recovering from Acute Coronary Syndrome.

This study investigated the effect of consumption of table eggs enriched with n-3 polyunsaturated fatty acids (n-3 PUFA), lutein, vitamin E and selenium on microvascular function, oxidative stress and inflammatory mediators in patients after acute coronary syndrome (ACS). In a prospective, randomized, interventional, double-blind clinical trial, ACS patients were assigned to either the Nutri4 (N=15, mean age: 57.2±9.2 years), or the Control group (N=13; mean age 56.8±9.6 years). The Nutri4 group consumed three enriched hen eggs daily for three weeks, providing approximately 1.785 mg of vitamin E, 0.330 mg of lutein, 0.054 mg of selenium and 438 mg of n-3 PUFAs. Biochemical parameters, including serum lipids, liver enzymes, nutrient concentrations, serum antioxidant enzyme activity (catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD)), and markers of oxidative stress (thiobarbituric acid reactive substances (TBARS) and ferric reducing ability (FRAP)), were assessed before and after the dietary interventions. Additionally, arterial blood pressure, heart rate, body composition, fluid status, anthropometric measurements, and skin microvascular blood flow responses to various stimuli (postocclusive reactive hyperemia (PORH), acetylcholine- (AchID), and sodium nitroprusside- (SNPID)) were measured using laser Doppler flowmetry (LDF) throughout the study. The intake of Nutri4 eggs led to a significant reduction in LDL cholesterol levels, while the levels of total cholesterol remained within the established reference values. Consuming Nutri4 eggs resulted in a 12.7% increase in serum vitamin E levels, an 8.6% increase in selenium levels, and demonstrated a favorable impact on microvascular reactivity, as evidenced by markedly improved PORH and ACh ID. Nutri4 eggs exerted a significant influence on the activity of GPx and SOD, with no observed changes in TBARS or FRAP values. The consumption of Nutri4 eggs positively influenced microvascular function in individuals with ACS, without eliciting adverse effects on oxidative stress.

Selenium supplementation and placebo are equally effective in improving quality of life in patients with hypothyroidism.

We investigated whether selenium supplementation improves quality-of-life (QoL) in patients with autoimmune thyroiditis (ID:NCT02013479). We included 412 patients ≥18 years with serum thyroid peroxidase antibody (TPOAb) level ≥100 IU/mL in a multicentre double-blinded randomised clinical trial. The patients were allocated 1:1 to daily supplementation with either 200 μg selenium as selenium-enriched yeast or matching placebo tablets for 12 months, as add-on to levothyroxine (LT4) treatment. QoL, assessed by the Thyroid-related Patient-Reported-Outcome questionnaire (ThyPRO-39), was measured at baseline, after six weeks, three, six, 12, and 18 months. In total, 332 patients (81%) completed the intervention period, of whom 82% were women. Although QoL improved during the trial, no difference in any of the ThyPRO-39 scales was found between the selenium group and the placebo group after 12 months of intervention. In addition, employing linear mixed model regression no difference between the two groups was observed in the ThyPRO-39 composite score (28.8 [95%CI:24.5-33.6] and 28.0 [24.5-33.1], respectively; P=0.602). Stratifying the patients according to duration of the disease at inclusion, ThyPRO-39 composite score, TPOAb level, or selenium status at baseline did not significantly change the results. TPOAb levels after 12 months of intervention were lower in the selenium group than in the placebo group (1995 [95%CI:1512-2512] vs. 2344 kIU/L [1862-2951]; P=0.016) but did not influence LT4 dosage or free triiodothyronine/free thyroxin ratio. In hypothyroid patients on LT4 therapy due to autoimmune thyroiditis, daily supplementation with 200 μg selenium or placebo for 12 months improved QoL to the same extent.

ВЛИЯНИЕ СЕЛЕНА НА МЯСНУЮ ПРОДУКТИВНОСТЬ БРОЙЛЕРОВ

The research results have been given in the article on selenium containing preparation influence on broilers meat production. Determined that the preparation using in broiler rations (experimental group 1 — 0.7 mg of preparation per 1 kg of feed, experimental group 2 — 0.9 mg/kg and experimental group 3 — 1.1 mg/kg) promoted eviscerated carcass mass increasing by 2.52%; 5.46% (P<0.01) and 4.03% (P<0.05) respectively; carcass edible parts mass by 3.08%; 6.64% (P<0.01) and 5.02% (P<0.05); breast muscles mass by 3.20%; 6.77% (P<0.05) and 5.04% (P<0.05) in comparison with the control group. Meat quality has improved in broilers of experimental groups: dry matter content in breast muscles has increased by 0.12%; 0.24% (P<0.01) and 0.19% (P<0.05); protein content has increase by 0.25% (P<0.05); 0.44% (P<0.01) and 0.33% (P<0.05); fat content by 0.06%; 0.11% (P<0.05) and 0.13% (P<0.01). The best traits of meat yields and quality has been found in broilers that have received 0.9 mg of selenium containing preparation per 1 kg of feed.

PREPARATION OF IRON(II) AND SELENIUM(IV) DIETARY SUPPLEMENTS BY THEIR BIOTRANSFORMATION IN ARTHROSPIRA SP.

Background. The aim of the research was to develop a new method of growing Arthrospira sp. under closed conditions so that the resulting microalgae would be free of microbial contamination, heavy metal contamination and PAHs, while containing additional nutrients (iron and selenium). The project included industrial research, development work and patent applications for the results obtained. The industrial research consisted of experimental cultivation of spirulina and phycocyanin extraction under laboratory conditions, and research on the antioxidant ORAC parameter. Results and conclusions. The raw material obtained from the study meets all quality standards required by law in terms of heavy metal and PAH, as well as microbiological purity. It was shown that microalgae grown using the supplementation method contain on average 57.7 µg of selenium in a daily serving of 3 g. The iron contentin the raw material was up to 11.7 mg in 3 g. Moreover, a significant ORAC factor was recorded. Based on the results, it can be concluded that spirulina-Fe(II) and spirulina-Se(IV) show significant antioxidant potential and are useful raw materials for the production of dietary supplements and functional food. Dietary supplements and functional food produced using the methods employed in the study may not only be important in supplementing with micronutrients Fe(II) and Se(IV), but can also be used to supplement the diet with the valuable ingredients of Arthrospira sp.

Improved titer and stability of selenium nanoparticles produced by engineered Saccharomyces cerevisiae

Selenium nanoparticles (SeNPs) have gained significant attention in the fields of medicine and healthcare products due to their various biological activities and low toxicity. In this study, we focused on genetically modifying the Saccharomyces cerevisiae strain YW16 (CICC 1406), which has the ability to efficiently reduce sodium selenite and produce red SeNPs. By overexpressing genes involved in glutathione production, we successfully increased the glutathione titer of the modified strain YJ003 from 41.0 mg/L to 212.0 mg/L. Moreover, we improved the conversion rate of 2.0 g/L sodium selenite from 49.3% to 59.6%. Furthermore, we identified three surface proteins of SeNPs, and found that overexpression of Act1, one of the identified proteins, led to increased stability of SeNPs across different acid-base and temperature conditions. Through a 135-h feed fermentation process using 5.0 g/L sodium selenite, we achieved an impressive conversion rate of 88.7% for sodium selenite, and each gram of SeNPs contained 195.7 mg of selenium. Overall, our findings present an efficient method for yeast to synthesize SeNPs with high stability. These SeNPs hold great potential for applications in nanomedicine or as nutritional supplements to address selenium deficiency.

Selenium in Cancer Rehabilitation-A Retrospective Study from a Specialized Clinic.

Micronutrient deficiencies are common at the time of cancer diagnosis and are associated with worse prognosis. Little is known about them in cancer rehabilitation. Data from routine health-related quality of life (HRQOL) were analyzed at an inpatient cancer rehabilitation center. Rehabilitation patients completed the EORTC QLQ-C30 questionnaire before and after multidisciplinary rehabilitation treatment and three months after discharge. Selenium and zinc status were measured in whole blood at these three time points. In case of selenium deficiency, up to 600 µg selenium per day as sodium selenite was supplemented for three weeks during and for three months after rehabilitation. A total of 271 patients (breast, colon, and pancreatic cancer) were included in the analysis. There was clinically meaningful improvement in many domains of the EORTC QLQ-C30 during rehabilitation. However, the effect often waned in the three months after. Prevalence for selenium deficiency varied between 34 to 90% depending on cancer type (breast < colon < pancreas). In contrast, zinc deficiency was rare. Daily selenium supplementation of 600 µg was more efficient to correct selenium deficiency compared to 300 µg selenium per day. Rehabilitation and increasing selenium status after rehabilitation were associated with improved global quality of life, physical and emotional functioning, and fatigue. In cancer patients with decreasing selenium status, values of global quality of life, physical and emotional functioning, and fatigue were back to the values at the beginning of rehabilitation. Selenium deficiency is common in cancer patients admitted to a cancer rehabilitation clinic. Selenium supplementation during rehabilitation effectively corrected selenium deficiency in most cases. The positive effects of rehabilitation persisted longer when selenium status did not decrease after rehabilitation.

The Effect of using Nano-Selenium and Vitamin D3 on some Blood Parameters in Male Awassi Lambs

The research was carried out in the Animal Production Department of the College of Agriculture at Tikrit University in Iraq. The goal of this study was to examine the impact of administering nano-selenium and vitamin D3 to Awassi sheep on a variety of biochemical parameters of blood. Sixteen Awassi lambs were employed in the study; their ages ranged from (4-5) months, and their average weight was (19.56 0.17 kg). These lambs were randomly split into four groups (4 animals per group), and the investigation spanned two time periods (45 and 90 days). The first group (control) received 10 ml of distilled water (per animal), while the second group (treatment) was dosed with 0.5 mg of selenium nanoparticles/kg of feed and the third group (treatment) was dosed with 5.5 international units of vitamin D3/kg of body weight. Fourth, the results of this investigation showed that the levels of total cholesterol, triglycerides, and low lipoproteins all decreased significantly (P≤0.05) after a combination dose of the nano-element selenium and vitamin D3 (0.5 mg/kg feed + 5.5 international units/kg body weight). High-density lipoproteins were significantly increased (P≤0.05) in the second treatment compared to the control treatment, but low-density and very low-density lipoproteins were decreased. Serum creatinine levels were found to be significantly lower after the second and fourth treatments compared to the first (control) and third treatments (P≤0.05), whereas blood urea levels and AST and ALT enzyme levels were not statistically different between the treatments.

A Randomized, Double-Blind, Placebo-Controlled Investigation of Selenium Supplementation in Women at Elevated Risk for Breast Cancer: Lessons for Re-Emergent Interest in Selenium and Cancer.

Damage to cellular macromolecules such as DNA and lipid, induced via reactive oxygen species, and indicators of cell proliferation potential such as insulin-like growth factor (IGF) metabolic status are intermediate biomarkers of breast cancer risk. Based on reports that selenium status can affect these markers, a randomized, placebo-controlled, double-blind experiment was conducted to investigate the potential of selenium supplementation to modulate breast cancer risk. Using a placebo tablet or a tablet containing 200 μg selenium provided as high-selenium yeast daily for one year, concentrations of the biomarkers in blood or urine were assessed at baseline and after 6 and 12 months of intervention. The selenium intervention used in this study is presumed to mediate its effect via the induction of glutathione peroxidase activity and the consequential impact of the active form of this protein on oxidative damage. We found no evidence to support this hypothesis or to indicate that systemic IGF metabolic status was affected. Critical knowledge gaps must be addressed for the resurgence of interest in selenium and cancer to garner clinical relevance. Those knowledge gaps include the identification of a specific, high-affinity selenium metabolite and the cellular target(s) to which it binds, and the demonstration that the cellular determinant that the selenium metabolite binds plays a critical role in the initiation, promotion, or progression of a specific type of cancer.

The Effect of Oral Selenium on the Size of Thyroid Nodules in Patients with Benign Thyroid nodules: A Brief Study

Objective: The thyroid gland is susceptible to the formation of nodules. Therefore, due to the critical role of selenium in the function of the thyroid gland, the impact of this element on the size and volume of this organ and its nodules were examined.&#x0D; Materials and Methods: During three months, two groups consisting of 30 patients with benign thyroid nodules who were referred to Baghaeipour Endocrinology Clinic were given daily doses of 100 and 200 micrograms of selenium, and a control group of 30 people without selenium consumption were assessed.&#x0D; Results: The results of intergroup analysis detected that the mean (±SD) of nodules length in the 100 µg selenium consumer group was 17.13 (±7.9) and 14.93 (±6.01) before and after intervention respectively (P= 0.008). About the nodules height in the 200 µg selenium consumer group, the mean (±SD) was 9.3 (±2.8) and 8.93 (±2.71) before and after intervention in that order (P= 0.001).&#x0D; Conclusion: Our findings suggest that selenium has been effective in the size and volume of the nodule and thyroid gland, as well as the TSH hormone, and further studies are needed to determine its therapeutic approach and efficacy.

Provision of Small-Quantity Lipid-Based Nutrient Supplements Increases Plasma Selenium Concentration in Pregnant Women in Malawi: A Secondary Outcome of a Randomized Controlled Trial

ABSTRACTBackgroundPregnant women in Malawi are at risk of selenium deficiency, which can have adverse effects on pregnancy outcomes. Interventions for improving selenium status are needed.ObjectivesTo assess the effect of provision of small-quantity lipid-based nutrient supplements (SQ-LNSs) to Malawian women during pregnancy on their plasma selenium concentrations at 36 wk of gestation.MethodsPregnant women (≤20 wk of gestation) were randomly assigned to receive daily either: 1) iron and folic acid (IFA); 2) multiple micronutrients (MMN; 130 µg selenium per capsule); or 3) SQ-LNS (130 µg selenium/20 g). Plasma selenium concentrations were measured by inductively coupled plasma mass spectrometry at baseline and after ≥16 wk of intervention (at 36 wk of gestation) and compared by intervention group.ResultsAt 36 wk of gestation, median (quartile 1, quartile 3) plasma selenium concentrations (micromoles per liter) were 0.96 (0.73, 1.23), 0.94 (0.78, 1.18), and 1.01 (0.85, 1.28) in the IFA, MMN, and SQ-LNS groups, respectively. Geometric mean (GM) plasma selenium concentration was 5.4% (95% CI: 1.8%, 9.0%) higher in the SQ-LNS group than in the MMN group and tended to be higher than in the IFA group (+4.2%; 95% CI: 1.0%, 7.8%). The prevalence of adjusted plasma selenium concentrations <1 µmol/L was 55.1%, 57.8%, and 47.3% in the IFA, MMN, and SQ-LNS groups, respectively; it was lower in the SQ-LNS group than in the MMN group, OR = 0.44 (95% CI: 0.24, 0.83), and tended to be lower than in the IFA group, OR = 0.54 (95% CI: 0.29, 1.03). There was a significant interaction between baseline plasma selenium concentration and intervention group (P = 0.003). In the lowest tertile of baseline selenium concentrations, GM plasma selenium concentration was higher, and the prevalence of low values was lower in the SQ-LNS group compared with the MMN and IFA groups at 36 wk of gestation (P ≤ 0.007).ConclusionsProvision of SQ-LNS containing selenium to pregnant women can be an effective strategy for improving their selenium status.This trial was registered at clinicaltrials.gov (identifier: NCT01239693).

Selenium supplementation levels and sources in postlarvae Nile tilapia diet

Fish larviculture exert great influence in the subsequent phases, in which nutrition is a basic prerequisite for success. Therefore, when it is in an intensified production system, it promotes the limitation of some minerals, making it necessary to supplement selenium in diets for post-larvae. The objective of this study was to evaluate selenium levels and sources in post-larvae Nile tilapia diets on muscle performance and histology. A total of 1,260 post-larvae with an initial average weight of 0.010 g were used, distributed in a completely randomized design in a factorial scheme with four supplementation levels (0.6; 0.9; 1.2 and 1.5 mg of Se/Kg) and two sources (sodium selenite and selenium yeast), plus the negative control, with 35 post-larvae Nile tilapia used per experimental unit. The physical-chemical parameters of water quality were within those recommended for tilapia cultivation. Feed consumption (p &lt; 0.05) and hepatosomatic index (p &lt; 0.05) were affected by the source used. Effects of supplemented selenium levels and sources were not observed for the other performance variables. Higher values for final height, final width, specific development rate and protein efficiency rate were found (p &lt; 0.05) when comparing the control diet with diets containing the sodium selenite source. No effects on muscle fiber morphometry were observed (p &gt; 0.05) in the studied variables. It is concluded that 0.6 mg of selenium in the diet, regardless of the source used, met the mineral requirement for post-larvae Nile tilapia.

The effects of selenium administration on carotid intima-media thickness and metabolic status in diabetic hemodialysis patients: A randomized, double-blind, placebo-controlled trial.

Intake of dietary antioxidants is inversely associated with reduced markers of atherosclerosis development such as carotid intima-media thickness (CIMT). This study was designed to assess the effects of selenium supplementation on CIMT and metabolic profiles of in diabetic hemodialysis (HD) patients. This randomized, double-blind, placebo-controlled trial was performed on 60 diabetic HD patients. Subjects were randomly assigned to receive selenium supplements or placebo (starch). Individuals in the selenium group (n=30) received 200μg selenium per day in the placebo group (n=30) received for 24 weeks. Fasting blood samples were taken at the study baseline and after 24 weeks of intervention. Following the administration of selenium supplements, was observed a significant reduction in serum insulin levels (P=0.003), insulin resistance (P=0.003), total cholesterol (P=0.008), LDL-cholesterol (P<0.001) and C-reactive protein (CRP) (P<0.001), and a significant increase in insulin sensitivity (P<0.001), HDL-cholesterol (P<0.001) and total glutathione (GSH) (P<0.001) compared with the placebo. Selenium supplementation in diabetic HD patients had beneficial effects on markers of insulin metabolism, total-, LDL-, HDL-cholesterol, CRP and GSH levels. This trial was registered at www.irct.ir as http://www.irct.ir: IRCT20170513033941N47.

Clinical effect of methimazole combined with selenium in the treatment of toxic diffuse goiter in children.

BACKGROUNDThe incidence of toxic diffuse goiter (Graves’ disease) is higher in adolescents and preschool-aged children, with an upward trend. The incidence at 6–13 years of age is approximately 11.0%, and the incidences in men and women are 7.8% and 14.3%, respectively.AIMTo explore the clinical effect of methimazole combined with selenium in the treatment of toxic diffuse goiter (Graves’ disease) in children and its effect on serum anti-thyroglobulin antibody (TRAb) and anti-thyroid peroxidase antibody (TPOAb).METHODSA total of 103 children with Graves’ disease treated in our hospital from January 2018 to June 2021 were divided into a traditional group and a combined group (15-20 mg methimazole orally given to children) and a combined group (50 µg selenium added on the basis of traditional treatment) according to different treatment methods to explore the therapeutic effects of the two methods and to observe the changes in thyroid volume and serum TRAb, TPOAb, free thyroxine (FT4) and inflammatory factor levels before and after treatment. The time taken for FT4 to return to normal was compared between the two groups.RESULTSTreatment was significantly more effective in the combined group than in the traditional group (P < 0.05). The thyroid volumes of the children in the two groups was measured before and after treatment. Thyroid volume decreased significantly after treatment in both groups, and the thyroid volume was significantly lower in the combined group than in the traditional group (P < 0.05). The serum levels of interleukin-6 (IL-6), IL-8, TRAb, TPOAb and FT4 in the two groups were detected before and after treatment. The levels of IL-6, IL-8, TRAb, TPOAb and FT4 were significantly lower in the combined group than in the traditional group (P < 0.05). Follow-up of the children in the two groups showed that compared with the traditional group, it took less time for children in the combined group to return to the normal level (P < 0.05).CONCLUSIONMethimazole combined with selenium can effectively treat Graves’ disease in children, reduce the expression of TRAb, TPOAb, FT4 and inflammatory factors, and improve the curative effect. Thus, the combined treatment warrants further clinical research.

White spots in the questions related to selenium deficiency: about the place of selenium-containing drugs in the treatment of thyroid pathology

White spots in the questions related to selenium deficiency: about the place of selenium-containing drugs in the treatment of thyroid pathology

Comparison of 3- and 6-Month Outcomes of Combined Oral L-Carnitine Fumarate and Acetyl-L-Carnitine Therapy, Included in an Antioxidant Formulation, in Patients with Idiopathic Infertility.

The male factor is responsible for infertility in about 35–40% of all cases. Idiopathic oligo- and/or astheno- and/or therato-zoospermia is one of the most common male fertility disorders and remains a significant therapeutic challenge. The primary cause of idiopathic male infertility remains unknown but seems to be associated with oxidative stress. Objective: The use of antioxidative formulation to improve qualitative and quantitative deficiencies in the male gametes.In total, 78 subjects were treated with a combination of 1,725 mg L-carnitine fumarate, 500 mg acetyl-L-carnitine, 90 mg vitamin C, 20 mg coenzyme Q10, 10 mg zinc, 200 µg folic acid, 50 µg selenium, and 1.5 µg vitamin B12 (Proxeed® Plus, Sigma-Tau, Italy) for 6 months; the preparation was taken twice daily from the time idiopathic infertility was diagnosed. Basic seminal parameters were evaluated by a European Society of Human Reproduction and Embryology (ESHRE) -certified embryologist following the fifth edition of the World Health Organisation (2010) guidelines at three time points: at baseline and 3 and 6 months of treatment.Improvements in semen parameters (differing in terms of dynamics) were evident at 3 months and gradually improved over the 6 months of treatment. Each parameter: sperm concentration, total sperm count, sperm total and progressive motility improved significantly after treatment except for the percentage of sperm of abnormal morphology and ejaculate volume.Proxeed Plus was effective for patients with idiopathic infertility; however, a long treatment period is needed to achieve optimal results.

EVALUATING THE EFFECT OF SELENIUM IN PREVENTING ORAL MUCOSITIS: A RANDOMIZED CLINICAL TRIAL

Introduction: Radiation-induced oral mucositis (RIOM) is one of the most common complications in head and neck cancer (HNC) patients and thought to occur through oxidative stress. Selenium(Se) has attracted tremendous interest because of its importance as antioxidant and anti-inflammatory. Objectives: Evaluating the effectiveness of Se in the prevention of radiation‐induced oral mucositis(OM). Patients and methods: A randomized controlled clinical study was conducted on 40 head and neck cancer patients undergoing radiotherapy at the Department of Clinical Oncology, Faculty of medicine, Alexandria University, Egypt. Patients were assigned equally to either control group who received conventional preventive medications or test group who received 200 mg of selenium twice daily along with the conventional preventive medications. All patients were clinically evaluated for OM severity (objective assessment) and pain (subjective assessment) at day 1 of radiotherapy, day 14, day 21 and day 42. Results: There was no significant difference comparing control and test groups regarding severity of OM and mean pain score during the 4 times of assessment. Conclusion: The administration of Se supplementation during radiotherapy has no effect on OM severity and its related pain regarding World Health Organization (WHO) scale and visual analogue scale(VAS) respectively.

Effect of Selenium-Enriched Yeast Supplementation on Serum Thyroid-Stimulating Hormone and Anti-Thyroid Peroxidase Antibody Levels in Subclinical Hypothyroidism: Randomized Controlled Trial.

Background:In the subclinical hypothyroidism, T4 or T3 levels are normal and thyroid-stimulating hormone (TSH) is slightly high. Selenium deficiency can lead to thyroid dysfunction. The present study aims to investigate the effect of selenium supplementation on the thyroid hormone and anti-thyroid peroxidase antibody (anti-TPO AB) levels.Materials and Methods:In this double-blinded, randomized, placebo-controlled clinical trial, 42 patients with subclinical hypothyroidism were randomly assigned to receive 200 μg selenium or placebo for 8 weeks. In the both groups, the serum TSH and anti-TPO antibody levels were measured and assessed before and after the intervention.Results:After the interventions, the mean serum TSH reduction in the intervention and placebo groups was −10.98 ± 33.31 and −3.20 ± 38.36, respectively, which were not statistically significant. However, the mean serum anti-TPO Ab concentration increased in the intervention and placebo groups (109.81 ± 51.49% vs. 173.17 ± 96.26%), between which the difference was not statistically significant (P >0.05) despite a slight increase in the mean anti-TPO level in the intervention group.Conclusion:The results of the current study indicated that selenium supplementation has no significant effect on serum anti-TPO Ab and TSH levels in the patients with subclinical hypothyroidism. Studies with larger sample size and with different doses of selenium are needed to reach more precise results.

EFEK SELENIUM OKSIKLORIDA TERHADAP AKTIVITAS IMUNOMODULATOR DARI EKSOPOLISAKARIDA Lactobacillus plantarum

Lactobacillus plantarum (LAB) is a group of lactic acid bacteria that can produce exopolysaccharide (EPS). The objective of this study was to determine the effect of adding selenium chloride oxide (SeOCl2) to the increased immunomodulatory potential of EPS L. plantarum Y-1.2. The experiment was conducted in vivo using macrophage cells of peritoneal fluid of mice induced by Staphylococcus aureus. EPS was obtained by precipitation at 4 °C. Identification test using HPLC showed that crude EPS of L. plantarum Y-1.2 containing glucose monomers for value retention times 4.198 and 4.204, crude EPS approaches the retention time of glucose BP 4.234. Testing of immuno-modulatory divided into six treatment groups. Group 1-3 as the control group, a positive control (Stimuno), negative control (crude EPS 50 mg/kg BW in mice), normal control (distilled water). Group 4-6 as the test group was given crude EPS 50 mg/kg BW in mice and selenium oxide chloride doses of 0.13 µg; 0.26 µg; 0.52 µg. The test results showed a dosage of 0.52 µg selenium chloride oxide to crude EPS of 50 mg/kg BW in mice could increase the activity and phagocytic capacity amounted to 28.06% and 28.39%

Derepression of glomerular filtration, renal blood flow and antioxidant defence in patients with type 2 diabetes at high-risk of cardiorenal disease

BackgroundThe role of antioxidant status on microvascular blood flow and glomerular filtration (eGFR) in patients with type 2 diabetes and hypertension whose risk of progressive renal disease varies by ethnicity is unknown. MethodsAdult, non-Caucasian (n = 101) and Caucasian (n = 69) patients with type 2 diabetes, hypertension and/or microalbuminuria and an eGFR > 45 mL/min/1.73 m2 were randomised to receive 400 IU vitamin E and/or 20 μg selenium daily or matching placebo. eGFR (CKD-EPI) was measured at baseline, 3,6 and 12 months and renal blood flow by contrast-enhanced ultrasonography in a sub-group (n = 9) at baseline and 3 months by assessing the area under the time intensity curve (TIC). Circulating glutathione peroxidase 3 (GPx-3) activity was measured as a biomarker of oxidative defence status. ResultsThe time to change in eGFR was shortest with combined vitamin E and selenium than usual care (5.6 [4.0–7.0] vs 8.9 [6.8–10.9 months]; p = 0.006). Area under the TIC was reduced compared to baseline (38.52 [22.41–90.49] vs 123 [86.98–367.03]dB.s; P ≤ 0.05 and 347 [175.88–654.92] vs 928.03 [448.45–1683]dB.s; P ≤ 0.05, respectively] at 3 months suggesting an increase in rate of perfusion. The proportional change in eGFR at 12 months was greater in the group whose GPx-3 activity was above, compared with those below the cohort median (360 U/L) in the non-Caucasian and the Caucasian groups (19.1(12.5–25.7] % vs 6.5[-3.5 to 16.5] % and 12.8 [0.7 to 24] % vs 0.2 [-6.1 to 6.5] %). ConclusionIn these patients with type 2 diabetes and early CKD, antioxidant treatment derepresses renal blood flow and a rise in eGFR correlated directly with GPx-3 activity. SignificanceDiabetes mellitus is the world's leading cause of end-stage renal disease which has a predilection for black and minor ethnic groups compared with Caucasians. The differences in risk despite the benefits of conventional care may be related to oxidative stress. We found that glomerular filtration and renal blood flow is suppressed when renal function is preserved in high-risk patients with type 2 diabetes. Conventional care supplemented with selenium - the co-factor for glutathione peroxidase-3 (GPx-3) - improves renal perfusion and increase glomerular filtration according to host antioxidant defence determined by GPx-3 activity. Circulating GPx-3 activity warrants further investigation as a novel biomarker of reversible haemodynamic changes in early diabetic kidney disease to better enable targeting of renoprotective strategies.