Achilles Tendon ; Citric Acid ; administration & dosage ; Humans ; Organometallic Compounds ; administration & dosage ; Tendinopathy ; drug therapy ; Vitamin E ; administration & dosage

V(E) acetate-loaded methoxy poly(ethylene glycol)-b-poly(lactic acid) amphiphilic diblock copolymer nano-dispersion (PMV) was prepared by self-emulsification/solvent evaporation method. The drug-loaded amount, size distribution of PMV nanoparticles, and entrapment efficiency of V(E) acetate (V(E)A) were determined by UV and laser particle analyzer. Drug release in vitro was primarily investigated by UV. The results indicate that the size of PMV nanoparticles is less than 300 nm and PMV is largely influenced by preparation methods, property of solvents, V(E)A-fed amount, and the concentration of dispersion. The initial burst release is not observed and the accumulated release is more than 79% after 14 h. This study develops a new formulation for V(E)A and provides an experimental basis for the novel drug delivery systems of V(E)A.
Delayed-Action Preparations ; chemical synthesis ; Drug Carriers ; administration & dosage ; chemistry ; Hydrophobic and Hydrophilic Interactions ; Nanoparticles ; Polyesters ; administration & dosage ; Polyethylene Glycols ; administration & dosage ; Vitamin E ; administration & dosage

Administration, Oral ; Adult ; Antioxidants ; administration & dosage ; pharmacology ; Ascorbic Acid ; administration & dosage ; pharmacology ; Humans ; Lipid Peroxidation ; drug effects ; Male ; Middle Aged ; Occupational Health ; Vitamin E ; administration & dosage ; pharmacology

OBJECTIVETo investigate the effect of oral sodium selenite and vitamin E on thyroid hormones in patients with cardiovascular disease at altitude.

METHODSNinety patients with cardiovascular disease were divided into A group (n = 42, sodium selenite + VE), B group (n = 28, sodium selenite only) and control group (n = 20). Serum selenium (Se), plasma glutathione peroxidase (GSH-Px), plasma malondialdehyde (MDA) and serum T(3) and T(4) were determined before and after 6 month treatment.

RESULTSSerum Se in A and B group after 6 month treatment were higher than before [(0.71 +/- 0.22) micromol/L vs (0.31 +/- 0.17) micromol/L, (0.68 +/- 0.18) micromol/L vs (0.33 +/- 0.14) micromol/L respectively, P < 0.01], and so were plasma GSH-Px levels [(87.12 +/- 13.61) U/L vs (58.43 +/- 18.93) U/L, (84.79 +/- 12.13) U/L vs (57.12 +/- 17.36) U/L respectively] while plasma MDA were lower than before [(4.86 +/- 1.18) nmol/ml vs (8.66 +/- 0.96) nmol/ml, (4.18 +/- 1.23) nmol/ml vs (8.71 +/- 0.87) nmol/ml respectively, P < 0.01]. Serum T(3) and T(4) levels in A and B group were also obviously decreased (P < 0.01). The levels of plasma GSH-Px were positively correlated with those of serum Se (r = 0.781, P < 0.01). The levels of plasma MDA and serum T(3) and T(4) were negatively correlated with those of serum Se (r = -0.385, -0.687, -0.412 respectively, P < 0.05). 31 cases (73.81%) in A group and 20 cases (71.42%) in B group completely recovered to normal; 4 cases (9.52%) in A group and 2 cases (7.43%) in B group partly recovered. The recovered rates were significantly different from that of control (P < 0.05).

CONCLUSIONSupplementation of adequate selenium may correct the abnormal function of secretion in thyroid hormones of patients because of lack of selenium at altitude areas.

Adult ; Altitude ; Cardiovascular Diseases ; blood ; drug therapy ; Female ; Humans ; Male ; Middle Aged ; Sodium Selenite ; administration & dosage ; therapeutic use ; Thyroid Hormones ; blood ; Vitamin E ; administration & dosage ; therapeutic use

To investigate primary metabolites of alpha-tocopherol in human urine, the urine samples of five healthy volunteers after oral administration of 250 mg vitamin E once a day for seven days were collected within 0 -6 h in the seventh day. The samples were purified through C18 solid-phase extraction cartridge and analyzed by liquid chromatography-tandem mass spectrometry. alpha-Tocopheronic acid, 2,5,7, 8-tetramethyl-2-(2'-carboxyethyl) -6-suphate-chroman (alpha-CEHC-sulphate), gamma-tocopheronolactone, and 2, 5, 7, 8-tetramethyl-2-(4', 8', 12'-trimethyl-12'-carboxy dodecanyl) -6-suphate-chroman were found in urine of volunteers as four primary metabolites of alpha-tocopherol. The method has shown to be promising for alpha-tocopherol detection with many desirable properties including high sensitivity and selectivity, thus providing a reliable pathway for further study in metabolism of alpha-tocopherol.
Administration, Oral ; Antioxidants ; administration & dosage ; pharmacokinetics ; Chromatography, High Pressure Liquid ; methods ; Humans ; Spectrometry, Mass, Electrospray Ionization ; methods ; Vitamin E ; pharmacokinetics ; alpha-Tocopherol ; metabolism ; urine

OBJECTIVETo examine the effect of multiple micronutrients supplementation on anti-oxidative activity and decreasing oxidized DNA damage of lymphocytes in Chinese children.

METHODS82 healthy children in a rural areas, aged 9-11 years, were selected and randomized allocated into group receiving supplements and control group with each of them 41. 24-hour dietary recall was used to collect data on daily nutrient intakes of the research subjects. The subjects in the supplement group were given vitamin A (VA) 600 microg, beta-carotene (beta-C) 1.0 mg, vitamin E (VE) 100 mg, vitamin C (VC) 300 mg and Na2SeO3(Se) 200 microg in a tablet on daily base while those in the control group took a same-sized color placebo tablet. The trial lasted 8 weeks. 5 ml blood samples from each subject were taken during 7 to 9 o'clock in the morning. DNA damage of lymphocytes and levels of plasma VA, VE, VC, beta-C, Se, malondialdehyde (MDA), activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) were then analyzed twice before and after the 8-week of trial.

RESULTSThe low intakes of VA, VC and Se only accounted for 50.6%, 65.6% and 67.3% of their recommended nutrient intake (RNI) respectively. After the trial, levels of plasma beta-C, VA, VE, VC and Se in the supplemented group increased by 13.4%, 32.8%, 11.5%, 46.9% and 24.6% respectively, compared with the control group, indicating that nutritional status regarding antioxidant nutrients had largely been improved. GSH-Px activity had a significant increase in the supplement group than before the supplement and in the control group (P < 0.01). GSH-Px before the trial (the 100.4 U/ml) also showed significant increase after the trial (161.7 U/ml) (P < 0.01). However, the values of SOD and MDA significantly decreased after the trial. Analysis of DNA damage indicated that there was no significant difference in the intrinsic damage of DNA (P > 0.05). Significant decreases of oxidized DNA damage induced by 5 micromol/L, 10 micromol/L and 25 micromol/L H2O2 were found more in peripheral lymphocytes of the supplemented group, than in pre-supplement and the control group after the trial (P < 0.01).

CONCLUSIONSupplementation of multiple micronutrients could effectively increase the levels of beta-C, VA, VE, VC and Se in plasma, and GSH-Px activity. In the meantime, MDA and oxidized DNA damage induced by a low level H2O2 decreased significantly after the trial. The reason accounted for the decrease of SOD activity after the trial needs to be further studied.

Antioxidants ; administration & dosage ; Ascorbic Acid ; administration & dosage ; Child ; China ; DNA Damage ; drug effects ; Dietary Supplements ; Female ; Humans ; Lymphocytes ; metabolism ; Male ; Malondialdehyde ; blood ; Nutrition Surveys ; Oxidative Stress ; drug effects ; genetics ; Rural Health ; Selenium ; administration & dosage ; Superoxide Dismutase ; blood ; Vitamin A ; administration & dosage ; Vitamin E ; administration & dosage ; Vitamins ; administration & dosage

The purpose of this study was to observe the effects of dietary intervention, through the modification of dietary fatty acids composition and antioxidant vitamins, on plasma thromboxane B2 (TXB2) levels in postmenopausal women with hypercholesterolemia. The subjects were treated for 12 weeks with one of three methods: hormone replacement therapy (HRT group, n=8), dietary intervention (DIET group, n=8), or HRT combined with dietary intervention (HRT +DIET group, n=8). Changes in serum phospholipid fatty acids composition, serum peroxides, and plasma TXB2 levels were measured at weeks 0, 4 and 12. The P/S ratio increased and the n-6/ n-3 ratio decreased in the DIET and the HRT +DIET group at week 4 (p<0.05). The ratio of C20:5/C20:4 in serum phospholipid increased in the DIET (p<0.05) and the HRT +DIET groups (NS) at week 4. Plasma TXB2 levels decreased in the DIET (-35%, p<0.05) and the HRT +DIET groups (-18.8%, NS) at week 4. Serum lipid peroxides levels significantly decreased by 10.5% and 15.2% in the DIET group at weeks 4 and 12, and by 10.8% in the HRT +DIET group only at week 12 (p<0.05). Dietary intervention may lower thrombotic risks in Korean postmenopausal women by changing the serum fatty acid composition, serum lipid peroxides levels and plasma thromboxane B2 levels.
Antioxidants/*administration & dosage/metabolism ; Ascorbic Acid/*administration & dosage/blood ; Dietary Fats/administration & dosage/blood ; Estrogen Replacement Therapy ; Fatty Acids/*administration & dosage/blood ; Female ; Humans ; Hypercholesterolemia/blood/*drug therapy ; Lipid Peroxidation ; Middle Aged ; Postmenopause ; Thromboxane B2/*blood ; Vitamin A/administration & dosage/blood ; Vitamin E/administration & dosage/blood

The present study was to evaluate effects of vitamin E on intravenous administration of lidocaine-induced antinociception. Experiments were carried out using male Sprague-Dawley rats. Orofacial formalin-induced nociceptive behavioral responses were used as the orofacial animal pain model. Subcutaneous injection of formalin produced significant nociceptive scratching behavior. Intraperitoneal injection of 5 and 10 mg/kg of lidocaine attenuated formalin-induced nociceptive behavior in the 2nd phase, compared to the vehicle-treated group. Intraperitoneal injection of 1 g/kg of vitamin E also attenuated the formalin-induced nociceptive behavior in the 2nd phase, compared to the vehicle-treated group. However, low dose of vitamin E (0.5 g/kg) did not affect the nociceptive behavioral responses produced by subcutaneous injection of formalin. The present study also investigated effects of intraperitoneal injection of both vitamin E and lidocaine on orofacial formalin-induced behavioral responses. Vehicle treatment affected neither formalin-induced behavioral responses nor lidocaine-induced antinociceptive effects. However, intraperitoneal injection of 0.5 g/kg of vitamin E enhanced the lidocaine-induced antinociceptive effects in the 2nd phase compared to the vehicle-treated group. Intraperitoneal injection of naloxone, an opioid receptor antagonist, did not affect antinociception produced by intraperitoneal injections of both vitamin E and lidocaine. These results suggest that treatment with vitamin E enhances the systemic treatment with lidocaine-induced antinociception and reduces side effects when systemically treated with lidocaine. Therefore, the combined treatment with vitamin E and lidocaine is a potential therapeutic for chronic orofacial pain.
Administration, Intravenous ; Animals ; Facial Pain ; Formaldehyde ; Humans ; Injections, Intraperitoneal ; Injections, Subcutaneous ; Lidocaine* ; Male ; Naloxone ; Rats* ; Rats, Sprague-Dawley ; Receptors, Opioid ; Vitamin E* ; Vitamins*

High-fat diet up-regulates either insulin resistance or triglycerides, which is assumed to be related to the expression of peroxisome proliferator-activated receptor (PPAR)-alpha and PPAR-gamma. The beneficial effects of vitamin E on insulin resistance are well known; however, it is not clear if vitamin E with a high-fat diet alters the expression of PPAR-alpha and PPAR-gamma. We investigated the effects of d-alpha-tocopherol supplementation on insulin sensitivity, blood lipid profiles, lipid peroxidation, and the expression of PPAR-alpha and PPAR-gamma in a high-fat (HF) diet-fed male C57BL/6J model of insulin resistance. The animals were given a regular diet (CON; 10% fat), a HF diet containing 45% fat, or a HF diet plus d-alpha-tocopherol (HF-E) for a period of 20 weeks. The results showed that the HF diet induced insulin resistance and altered the lipid profile, specifically the triglyceride (TG) and total cholesterol (TC) levels (P < 0.05). In this animal model, supplementation with d-alpha-tocopherol improved insulin resistance as well as the serum levels of TG and very-low-density lipoprotein-cholesterol (VLDL-C) (P < 0.05). Moreover, the treatment decreased the levels of malondialdehyde (MDA) in the serum and liver while increasing hepatic PPAR-alpha expression and decreasing PPAR-gamma expression. In conclusion, the oral administration of d-alpha-tocopherol with a high-fat diet had positive effects on insulin resistance, lipid profiles, and oxidative stress through the expression of PPAR-alpha and PPAR-gamma in a high-fat diet-fed male mice.
Administration, Oral ; Animals* ; Cholesterol ; Diet ; Diet, High-Fat ; Humans ; Insulin Resistance ; Lipid Metabolism* ; Lipid Peroxidation ; Liver ; Male ; Malondialdehyde ; Mice ; Models, Animal* ; Oxidative Stress ; Peroxisomes ; Triglycerides ; Vitamin E ; Vitamins

OBJECTIVETo explore the efficacy and safety of vitamin D (VD) in the treatment of idiopathic oligoasthenozoospermia.

METHODSThis study included 86 infertile men with idiopathic oligoasthenozoospermia, who were randomized to a VD and a control group of equal number, the former given oral VD 200 IU/d and calcium 600 mg/d,qd, while the latter administered oral vitamin E 100 mg and vitamin C 100 mg, tid. After 3 months of medication, we compared the semen parameters, adverse reactions, and pregnancy rate between the two groups.

RESULTSAfter medication, the count of progressively motile sperm per ejaculate was increased from (9.82 ± 3.72) x 10(6) to (21.47 ± 6.52) x 10(6) ( P < 0.05) and the proportion of progressively motile sperm from (18.41 ± 9.82)% to (28.27 ± 4.47)% (P < 0.05) in the VD group. In comparison, the count of progressively motile sperm per ejaculate was elevated from (9.51 ± 6.31) x 10(6) to (12.36 ± 4.43) x 10(6) (P > 0.05) and the proportion of progressively motile sperm from (17.79 ± 5.25)% to (21.35 ± 2.41)% (P > 0.05) in the control group. Pregnancy was achieved in 7 cases (16.3%) in the VD group, but only lease (2.3%) in the control (P < 0.05). No adverse reactions were observed in either of the groups.

CONCLUSIONVitamin D, as a safe option for the treatment of idiopathic oligoasthenozoospermia, can effectively improve the semen quality, especially the progressive sperm motility of the patient.

Administration, Oral ; Adult ; Asthenozoospermia ; drug therapy ; Female ; Humans ; Male ; Pregnancy ; Pregnancy Rate ; Semen ; drug effects ; physiology ; Semen Analysis ; Sperm Motility ; drug effects ; Vitamin D ; therapeutic use ; Vitamin E ; therapeutic use ; Vitamins ; therapeutic use