Administration Of Antioxidants Research Articles

GAMBARAN HISTOPATOLOGI PARU PADA MENCIT (Mus musculus) YANG DIPAPAR ASAP ROKOK KRETEK AKIBAT PENGARUH PEMBERIAN INFUSA TEH HIJAU (Camellia sinensis)

This study was conducted to determine the effect of antioxidant administration from green tea infusion (Camellia sinensis) on damage to the histological structure of the lung exposed to clove cigarette smoke in mice (Mus muscullus). Free radicals in cigarette smoke such as tar, nicotine, and carbon monoxide can cause various damages to the lung or
 This study was conducted to determine the effect of antioxidant administration from green tea infusion (Camellia sinensis) on damage to the histological structure of the lung exposed to clove cigarette smoke in mice (Mus muscullus). Free radicals in cigarette smoke such as tar, nicotine, and carbon monoxide can cause various damages to the lung organs due to oxidative stress caused by the reaction of ultrafine particles with cells. A total of 27 mice were taken from the Biochemical Laboratory of Airlangga University, Surabaya. In this study mice (Mus muscullus) were exposed to kretek cigarette smoke in the smoking chamber for 15 minutes in a period of 2 weeks, used 2 variants of antioxidant doses of green tea infusion of 0.45 gr to 0.6 gr. After the treatment was completed, the preparation of the mice's pulmonary organ preparations and damage to the structure of the lung organ were observed in 9 visual fields. The results showed that there was a relationship between the amount of cigarette smoke exposed and damage to the lung organs of mice when given antioxidant green tea. The administration of green tea antioxidants reduced inflammation of the lung organ infiltration of inflammatory cells by 44%, edema by 55%, and destruction of septa alveoli by 88%.
 gans due to oxidative stress caused by the reaction of ultrafine particles with cells. A total of 27 mice were taken from the Biochemical Laboratory of Airlangga University, Surabaya. In this study mice (Mus muscullus) were exposed to kretek cigarette smoke in the smoking chamber for 15 minutes in a period of 2 weeks, used 2 variants of antioxidant doses of green tea infusion of 0.45 gr to 0.6 gr. After the treatment was completed, the preparation of the mice's pulmonary organ preparations and damage to the structure of the lung organ were observed in 9 visual fields. The results showed that there was a relationship between the amount of cigarette smoke exposed and damage to the lung organs of mice when given antioxidant green tea. The administration of green tea antioxidants reduced inflammation of the lung organ infiltration of inflammatory cells by 44%, edema by 55%, and destruction of septa alveoli by 88%.

Effect of trans-resveratrol or ubiquinol supplementation on the sperm morphology of CD-1 mice subjected to forced swimming

This study was undertaken to assess the effect of a three-minute forced swimming protocol for 50 days, with and without antioxidant administration on sperm morphology in CD-1 mice. Seventy-five mice were randomly allocated to one of the following five groups: no exercise (control group; CG), swimming without antioxidant administration (EX), swimming with trans-resveratrol administration (EX-Resv), swimming with ubiquinol and excipient administration (Kaneka´s ubiquinol) (EX-Ubiq), and swimming with just only the excipient for Kaneka´s ubiquinol administration (EX-Excp). The EX group showed that 53.03±4.83% of sperm had abnormal morphology, with significant differences with regards to CG (46.47±10.57%) (p<0.05). The number of sperm with abnormal morphology decreased in all groups treated with either antioxidants or with excipient; this was most noticeable in EX-Ubiq (p<0.05). The percentage of midpiece and tail, as well as multiple anomalies were greater in EX than in CG (p<0.05). While both antioxidants, as well as the excipient, decreased midpiece and head anomalies, only trans-resveratrol and ubiquinol had an effect on multiple anomalies. Furthermore, only trans-resveratrol had an effect upon tail anomalies. The imposed exercise caused alterations in CD-1 mice sperm morphology, and antioxidant treatment seems suitable to decrease morphological anomalies. Both trans- resveratrol and ubiquinol were effective in decreasing simple as well as multiple sperm anomalies.

English

BACKGROUND Severe oxidative stress has been reported in TB patients because of infection associated with malnutrition and poor immunity. Mycobacteria can induce reactive oxygen species (ROS) production by activating phagocytes, and enhanced ROS production may promote tissue injury and inflammation. We wanted to compare the effect of antioxidant administration in the outcome of ATT treatment between the test and the control group. METHODS This perspective study was conducted in the Departments of Biochemistry and Chest Medicine, CMC & Hospital. Hundred patients (fifty controls and fifty tests) who were diagnosed as pulmonary tuberculosis and started on DOT therapy under RNTCP during this period were included in the study. Each participant in the study was subjected to the following test at the first visit, 2nd month and 6th month follow up (biochemical markers Nitric oxide, SOD, Glutathione Peroxidase and Vitamin E levels). Statistical analysis was done using SPSS version. RESULTS The results were based on four categories (male / female, alcoholic / non-alcoholic, smoker / non-smoker, and younger / older age group). Females had responded better with greater fall in percentage of nitric oxide values (69 %) than males (64.1 %). The mean of SOD activity (277.5 + / - 31.5) was more in smokers than non-smokers (261.3 + / - 36.0) & percentage fall of nitric oxide in smokers (65 %) & non-smokers (67 %). In alcoholics the percentage fall of nitric oxide (68.3 %) was higher with more SOD activity (Mean 278.7 + / - 27.6) than non-alcoholics (Mean 256 + / - 38.0) indicating a positive correlation of smoking & alcoholism with tuberculosis. Younger age group responded better with more fall in the percentage of nitric oxide (67 %) & mean SOD activity (265.8 + / - 30.1) than older age group. CONCLUSIONS Antioxidant supplementation reduces oxidative stress, improves the effectiveness of ATT therapy, and thus helps in improving the outcome in pulmonary tuberculosis. KEY WORDS Pulmonary TB, ATT (Anti-Tubercular Treatment), Antioxidants & Free Radicals

Antioxidants and Oligoasthenoteratozoospermia

The present review examines whether and to which extent the antioxidant drugs have a role in the management of patients with oligoasthenoteratozoospermia (OAT). Subfertility and especially semen parameters disorders presented as OAT have been associated with increased oxidative stress and on this basis, several studies of antioxidants administration toward its treatment have been carried out. In the limits of this literature review and by using scientific publications search engines (PubMed, Medscape, Cochrane Library, Google Scholar), 285 related studies were found in total. Among them, the 34 more relevant to the investigated topic, with a complete statistical analysis, were isolated and included in the present review. It seems that there is a significant positive impact of antioxidants on semen parameters' improvement and childbearing. However, these studies are quite heterogeneous and more studies are required, for safe conclusions to be extracted. Administration of antioxidants to those men should be a matter of individualized approach.

Mediterranean diet and oxidative stress

PurposeThis study aims to analyze the antioxidant properties of the Mediterranean diet and describe methods that are used in clinical studies to assess its role in reducing oxidative stress.Design/methodology/approachThe review presents the results of interventional and observational clinical trials aimed at assessing the influence of the Mediterranean diet on the level of enzymatic and non-enzymatic antioxidants, as well as the total blood antioxidant capacity.FindingsThe Mediterranean diet as a varied diet can be a better way to provide antioxidants to the body than supplements. Individual compounds administered in an isolated form can give the opposite effect to the expected, stimulating oxidative stress. The administration of antioxidants in the form of supplements instead of a varied diet is also associated with a lack of synergism of action. In studies on the importance of the Mediterranean diet in the reduction of oxidative stress, single markers are used to measure oxidative damage, the activity of enzymatic antioxidants and the concentration of individual non-enzymatic antioxidants. At the same time, the need to find markers that would assess the level of oxidative stress and the body’s antioxidant capacity more comprehensively is emphasized.Practical implicationsIt should be taken into account that differences between in vivo and in vitro results may result from the fact of various factors, including genetic, smoking, intestinal microflora or diet composition. It is also necessary to answer the question about which marker or set of markers could in the most comprehensive way to assess the level of oxidative stress and the body’s antioxidant capacity.Originality/valueThe literature review shows not only the source of antioxidants in the Mediterranean diet. This paper also presents a critical approach to markers that allow the assessment of the antioxidant properties of the diet.

Molecular and Cellular Substrates for the Friedreich Ataxia. Significance of Contactin Expression and of Antioxidant Administration.

In this study, the neural phenotype is explored in rodent models of the spinocerebellar disorder known as the Friedreich Ataxia (FA), which results from mutations within the gene encoding the Frataxin mitochondrial protein. For this, the M12 line, bearing a targeted mutation, which disrupts the Frataxin gene exon 4 was used, together with the M02 line, which, in addition, is hemizygous for the human Frataxin gene mutation (Pook transgene), implying the occurrence of 82–190 GAA repeats within its first intron. The mutant mice phenotype was compared to the one of wild type littermates in regions undergoing differential profiles of neurogenesis, including the cerebellar cortex and the spinal cord by using neuronal (β-tubulin) and glial (Glial Fibrillary Acidic Protein) markers as well as the Contactin 1 axonal glycoprotein, involved in neurite growth control. Morphological/morphometric analyses revealed that while in Frataxin mutant mice the neuronal phenotype was significantly counteracted, a glial upregulation occurred at the same time. Furthermore, Contactin 1 downregulation suggested that changes in the underlying gene contributed to the disorder pathogenesis. Therefore, the FA phenotype implies an alteration of the developmental profile of neuronal and glial precursors. Finally, epigallocatechin gallate polyphenol administration counteracted the disorder, indicating protective effects of antioxidant administration.

Modelling the effects of age-related morphological and mechanical skin changes on the stimulation of tactile mechanoreceptors

Our sense of fine touch deteriorates as we age, a phenomenon typically associated with neurological changes to the skin. However, geometric and material changes to the skin may also play an important role on tactile perception and have not been studied in detail. Here, a finite element model is utilised to assess the extent to which age-related structural changes to the skin influence the tactile stimuli experienced by the mechanoreceptors. A numerical, hyperelastic, four-layered skin model was developed to simulate sliding of the finger against a rigid surface. The strain, deviatoric stress and strain energy density were recorded at the sites of the Merkel and Meissner receptors, whilst parameters of the model were systematically varied to simulate age-related geometric and material skin changes. The simulations comprise changes in skin layer stiffness, flattening of the dermal-epidermal junction and thinning of the dermis. It was found that the stiffness of the skin layers has a substantial effect on the stimulus magnitudes recorded at mechanoreceptors. Additionally, reducing the thickness of the dermis has a substantial effect on the Merkel disc whilst the Meissner corpuscle is particularly affected by flattening of the dermal epidermal junction. In order to represent aged skin, a model comprising a combination of ageing manifestations revealed a decrease in stimulus magnitudes at both mechanoreceptor sites. The result from the combined model differed from the sum of effects of the individually tested ageing manifestations, indicating that the individual effects of ageing cannot be linearly superimposed. Each manifestation of ageing results in a decreased stimulation intensity at the Meissner Corpuscle site, suggesting that ageing reduces the proportion of stimuli meeting the receptor amplitude detection threshold. This model therefore offers an additional biomechanical explanation for tactile perceptive degradation amongst the elderly. Applications of the developed model are in the evaluation of cosmetics products aimed at mitigating the effects of ageing, e.g. through skin hydration and administration of antioxidants, as well as in the design of products with improved tactile sensation, e.g. through the optimisation of materials and surface textures.

Doxorubicin-Induced Oxidative Stress and Endothelial Dysfunction in Conduit Arteries Is Prevented by Mitochondrial-Specific Antioxidant Treatment

BackgroundDoxorubicin (DOXO) chemotherapy increases risk for cardiovascular disease in part by inducing endothelial dysfunction in conduit arteries. However, the mechanisms mediating DOXO-associated endothelial dysfunction in (intact) arteries and treatment strategies are not established. ObjectivesWe tested the hypothesis that DOXO impairs endothelial function in conduit arteries via excessive mitochondrial reactive oxygen species (ROS) and that these effects could be prevented by treatment with a mitochondrial-targeted antioxidant (MitoQ). MethodsEndothelial function (endothelium-dependent dilation [EDD] to acetylcholine) and vascular mitochondrial ROS were assessed 4 weeks following administration (10 mg/kg intraperitoneal injection) of DOXO. A separate cohort of mice received chronic (4 weeks) oral supplementation with MitoQ (drinking water) for 4 weeks following DOXO. ResultsEDD in isolated pressurized carotid arteries was 55% lower 4 weeks following DOXO (peak EDD, DOXO: 42 ± 7% vs. sham: 94 ± 3%; p = 0.006). Vascular mitochondrial ROS was 52% higher and manganese (mitochondrial) superoxide dismutase was 70% lower after DOXO versus sham (p = 0.0008). Endothelial function was rescued by administration of the mitochondrial-targeted antioxidant, MitoQ, to the perfusate. Exposure to plasma from DOXO-treated mice increased mitochondrial ROS in cultured endothelial cells. Analyses of plasma showed differences in oxidative stress-related metabolites and a marked reduction in vascular endothelial growth factor A in DOXO mice, and restoring vascular endothelial growth factor A to sham levels normalized mitochondrial ROS in endothelial cells incubated with plasma from DOXO mice. Oral MitoQ supplementation following DOXO prevented the reduction in EDD (97 ± 1%; p = 0.002 vs. DOXO alone) by ameliorating mitochondrial ROS suppression of EDD. ConclusionsDOXO-induced endothelial dysfunction in conduit arteries is mediated by excessive mitochondrial ROS and ameliorated by mitochondrial-specific antioxidant treatment. Mitochondrial ROS is a viable therapeutic target for mitigating arterial dysfunction with DOXO.

Bioradical homeostasis as new complex parameters of different biological systems

The current state of free radical biomedicine allows us to formulate a fundamentally new parameter of homeostasis – homeostasis, understood as a state of free radical processes, reflecting the optimal intensity of the body metabolism of oxygen, nitrogen and halogens reactive species, carbonyls and other radical molecules. This term allows us to formulate another term – bioradical stress. It is proposed to understand the effective violation of the physiological level of free-radical processes associated with the formation of active forms of oxygen, nitrogen or halogens and/or a decrease in the activity of systems that limit their damaging effect. It combines all known syndromes associated with level shifts (oxidative, nitrosative, halogenating and carbonyl stress). The introduction of the concept of stress involves the study of the effectiveness of various options for specific pathogenetic correction of stress (the administration of antioxidants, directed stimulation of antioxidant capacity by active oxygen forms, the use of regulatory properties of NO, etc.). 800x600 Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Обычная таблица; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:Times New Roman,serif;}

New therapy for chemotherapy-induced hepatic failure in leukemia; a randomized double-blind clinical trial study

Introduction: Hepatotoxicity is usual toxicity after chemotherapy in acute lymphoblastic leukemia (ALL) patients. Conventional treatment methods such as supportive care did not have an effective role in the improvement of hepatotoxicity. Objectives: In this study clinical efficacy of milk thistle in contrast with placebo was compared in leukemia patients with chemotherapy-induced hepatotoxicity. Patients and Methods: In this double-blind study, 93 ALL patients with chemotherapy-induced hepatotoxicity were randomized to a clinical trial with milk thistle or placebo. Liver enzymes level evaluated during 70 days. We divided patients randomly into two groups. Milk thistle at dosage of 7 mg/kg daily was prescribed in the intervention group while in the control group, placebo pills similar to milk thistle in shape and color were prescribed daily. Results: At day 35 and day 70 of the study, in the milk thistle arm ALT and AST mean serum levels were lower than the placebo group (P<0.001). In the milk thistle group there was a significant reduction in mean of AST and ALT during the first 35 days in patients who were taking livergol in comparison to next 35 days that patients stopped taking it. Children’s age was between 3-15 years. Conclusion: Based on our results, milk thistle improves liver function in chemotherapy-induced hepatotoxicity and there was no need for dose reduction or discontinuation of chemotherapy. Future clinical trials should be conducted to explore longtime effect of livergol in leukemia patients and to determine if there is any need for prophylactic administration of antioxidants. Trial Registration: This clinical trial has been approved by the Iranian Registry of Clinical Trials at 2018-02-14 (identifier: IRCT20170821035831N2; http://en.irct.ir/trial/26957).

Primary and Secondary Markers of Doxorubicin-Induced Female Infertility and the Alleviative Properties of Quercetin and Vitamin E in a Rat Model

The incidence of cancer has recently risen among the women at the reproductive age. Therefore, exposure to doxorubicin (DOX) chemotherapy has become a cause of reproductive toxicity followed by secondary destructive effects. The present study aimed to evaluate the effects of quercetin (QCT) and vitamin.E (Vit.E) on doxorubicin-induced toxicity in the ovary and uterus, and the secondary bone-related effects in a rat model. Animals were divided into six groups including control normal saline/corn oil (CON), QCT at 20 mg/Kg, Vit.E at 200 mg/Kg, DOX at accumulative 15 mg/Kg, DOX/QCT, and DOX/Vit.E. After 21 days of treatment, the alterations were analyzed in histoarchitecture, apoptosis, hormones secretion, the gene expression of aromatase and estrogen α−receptor (ER-α) in the uterine and ovarian tissues, and serum levels of bone-related factors. The results demonstrated the ameliorative effects of QCT and Vit.E on doxorubicin caused altered ovarian histology, increased apoptosis, decreased ovarian aromatase and ER-α gene expression (p-value<0.05), decreased estrogen and progesterone levels, decreased ALP (p-value<0.001), and increased osteocalcin (p-value<0.05). The findings suggested that the studied antioxidants administration could be a promising fertility preservation strategy in DOX-treated females.

Protective Effect of Methylxanthine Fractions Isolated from Bancha Tea Leaves against Doxorubicin-Induced Cardio- and Nephrotoxicities in Rats.

Doxorubicin is an anthracycline antibiotic that is used for the treatment of various types of cancer. However, its clinical usage is limited due to its potential life-threatening adverse effects, such as cardio- and nephrotoxicities. Nonetheless, simultaneous administration of doxorubicin and antioxidants, such as those found in green tea leaves, could reduce cardiac and renal tissue damage caused by oxidative stress. The methylxanthine fraction isolated from Bancha tea leaves were tested in vitro for its antioxidant activity and in vivo for its organoprotective properties against doxorubicin-induced cardio- and nephrotoxicities in a rat model. The in vivo study was conducted on male Wistar rats divided into 6 groups. Methylxanthines were administered at high (5 mg/kg body weight) and low (1 mg/kg body weight) doses, while doxorubicin was administered at a cumulative dose of 20 mg/kg body weight. Serum creatinine, uric acid, and urea concentrations, as well as serum enzyme levels (creatinine kinase (CK), creatinine kinase MB fraction (CK-MB), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH)) and electrolytes (Na+, K+, and Cl−), were analysed. In addition, histological analysis was performed to assess cardiac and renal tissue damage. The concomitant administration of Bancha methylxanthines and doxorubicin showed a dose-dependent reduction in the serum biochemical parameters, indicating a decrease in the cardiac and renal tissue damage caused by the antibiotic. Histological analysis showed that pretreatment with methylxanthines at the dose of 5 mg/kg resulted in an almost normal myocardial structure and a significant decrease in the morphological kidney changes caused by doxorubicin exposure compared with the group that received doxorubicin alone. The putative mechanism is most likely related to a reduction in the oxidative stress caused by doxorubicin.

Apoptosis and Cell Proliferation Markers in Inflammatory-Fibroproliferative Diseases of the Vessel Wall (Review).

Apoptosis is the main feature of inflammatory-fibroproliferative disorders of the vessel wall. Studies in animal models have shown that smooth muscle cells (SMCs) cultured from endarterectomy specimens from the affected area proliferate more slowly and display higher apoptotic indices than SMCs derived from the normal vessel wall. Apoptotic cells were found in the destabilized atherosclerotic plaques, as well as in the samples with restenosis of the reconstruction area.Injury to the vessel wall causes two waves of apoptosis. The first wave is the rapid apoptosis in the media that occurs within a few hours after injury and leads to a marked reduction in the number of vascular wall cells. The second wave of apoptosis occurs much later (from several days to weeks) and is limited by the SMCs within the developing neointima. Up to 14% of the neointimal SMCs undergo apoptosis 20 days after balloon angioplasty. Ligation of the external carotid artery in a rabbit model led to a marked decrease in blood flow in the common carotid artery, which correlated with the increased apoptosis of endothelial cells and SMCs.Angioplasty-induced death of SMCs is regulated by a redox-sensitive signaling pathway, and topical administration of antioxidants can minimize vascular cell loss. On the whole, studies show that apoptosis is prevalent in vascular lesions, controlling the viability of both inflammatory and vascular cells, determining the cellular composition of the vessel wall. The main markers of apoptosis (Fas, Fas ligand, p53, Bcl-2, Bax) and cell proliferation (toll receptor) have been considered in the current review.

The Dynamics of Clinical and Laboratory Data in Patients with Firstly Diagnosed Pulmonary Tuberculosis and Alcohol Consumption, and the Possibility of Predicting the Effectiveness of Treatment

The objective: the study of dynamics of clinical and laboratory data after an intensive phase of treatment in patients with firstly diagnosed pulmonary tuberculosis (FDTB) who consume alcohol, and the development of a method for predicting the effectiveness of treatment.Materials and methods. A total of 109 men with FDTB aged 20 to 50 years were examined. Depending on the level of alcohol consumption, 3 groups of patients were formed. Patients of each group are divided into two subgroups depending on the treatment regimen.Results. An analysis of the dynamics of immuno-inflammatory indicators showed the greatest response to antioxidant therapy data of phagocytic and enzymatic activity of neutrophils and endogenous intoxication (p&lt;0.05). Assessment of the oxidative status indicators dynamics demonstrated the most significant effect of antioxidant in groups 1st and 2nd. The dynamics of a decrease in all indicators of oxidative stress in these groups was higher in patients receiving additional antioxidant therapy (p&lt;0.01). In group 3, the positive effect was less pronounced: an increase in blood levels of GPx and a decrease in diene conjugates and NO2 (p≤0.05) were determined. Models have been developed to predict the level of positive dynamics in the treatment of patients depending on the therapy received.Conclusions. The administration of antioxidants had the most significant positive effect on the dynamics of the levels of phagocytosis completeness, enzyme activity of neutrophils, medium molecular weight peptides and CRP and indicators of oxidative stress with the best effect in patients who drink alcohol at low and health-threatening levels. The initial alcohol consumpyion, phagocytic index and blood lymphocytes affect the positive effect of treatment according to the standard scheme of anti-tuberculosis therapy; when antioxidants are added to the standard scheme, the initial indicators of the alcohol consumption level and phagocytic number affect.

The Role of Oxidative Stress in Physiopathology and Pharmacological Treatment with Pro- and Antioxidant Properties in Chronic Diseases.

Oxidative stress (OS) has the ability to damage different molecules and cellular structures, altering the correct function of organs and systems. OS accumulates in the body by endogenous and exogenous mechanisms. Increasing evidence points to the involvement of OS in the physiopathology of various chronic diseases that require prolonged periods of pharmacological treatment. Long-term treatments may contribute to changes in systemic OS. In this review, we discuss the involvement of OS in the pathological mechanisms of some chronic diseases, the pro- or antioxidant effects of their pharmacological treatments, and possible adjuvant antioxidant alternatives. Diseases such as high blood pressure, arteriosclerosis, and diabetes mellitus contribute to the increased risk of cardiovascular disease. Antihypertensive, lipid-lowering, and hypoglycemic treatments help reduce the risk with an additional antioxidant benefit. Treatment with methotrexate in autoimmune systemic inflammatory diseases, such as rheumatoid arthritis, has a dual role in stimulating the production of OS and producing mitochondrial dysfunction. However, it can also help indirectly decrease the systemic OS induced by inflammation. Medicaments used to treat neurodegenerative diseases tend to decrease the mechanisms related to the production of reactive oxygen species (ROS) and balance OS. On the other hand, immunosuppressive treatments used in cancer or human immunodeficiency virus infection increase the production of ROS, causing significant oxidative damage in different organs and systems without widely documented exogenous antioxidant administration alternatives.

Study on Ajuga reptans Extract: A Natural Antioxidant in Microencapsulated Powder Form as an Active Ingredient for Nutraceutical or Pharmaceutical Purposes.

The administration of natural antioxidants is considered to be a prevention strategy for chronic diseases and a useful tool for the healthcare system to reduce the administration of expensive and often not effective treatments. The chemical characterization of a methanolic extract (AJ) of Ajuga reptans L. was performed, and its antioxidant activity was evaluated. AJ and the major compounds, characterized by chromatographic techniques as phenylpropanoids and iridoids, were able to reduce the Reactive Oxygen Species levels in cancer cell lines (melanoma, A375, cervical cancer, HeLa, and alveolar adenocarcinoma, A549), stimulated by E. coli lipopolysaccharide. However, a clinical translation of these results encountered a significant limitation represented by the poor water solubility and bioavailability of the extract and compounds. Consequently, a hydro-soluble powder system (AJEP3) was developed by spray-drying encapsulating AJ into a multi-component solid matrix that is based on L-proline and hydroxyethylcellulose as loading and coating agents, and lecithin as solubility enhancer. The technological approach led to a satisfactory process yield (71.5%), encapsulation efficiency (99.9%), and stability. The in vitro water dissolution rate of the bioactive compounds appeared to be improved with respect to the extract, suggesting higher feasibility in the manufacturing and administration; even the in vitro biological activity of the produced multi-component AJEP3 was clearly enhanced.

Stereological and histopathological evaluation of doxorubicin-induced toxicity in female rats' ovary and uterus and palliative effects of quercetin and vitamin E.

Doxorubicin (DOX) is a widely used chemotherapeutic agent with demonstrated reproductive toxicity. This study sought to determine the DOX-induced toxicity in the ovary and uterus and the preventive effects of quercetin (QCT) and vitamin E (Vit.E). Female rats were divided into six groups as follows: control, QCT (20 mg/kg), Vit.E (200 mg/kg), DOX (accumulative 15 mg/kg), DOX/QCT, and DOX/Vit.E. After 3 weeks, the toxicity of DOX in ovarian and uterine tissues and the potential palliative effects of QCT and Vit.E were evaluated by histopathological-stereological methods. The findings indicate a dramatic decline in the number of ovarian follicles (p < 0.001), ovarian and its associated structures volume, the volume of the uterus, its layers, and related structures (p < 0.05). Coadministration of QCT and Vit.E with DOX-treated rats demonstrated an alleviative effect on most of the studied parameters. Nevertheless, few adverse effects were recognized concerning these antioxidants administration (p < 0.05). In conclusion, the findings of this study support the protective role of these dietary supplements in the prevention of DOX-induced toxicity in uterine and ovarian tissues.

Chronic cadmium toxicity in rats: Treatment with combined administration of vitamins, amino acids, antioxidants and essential metals

The present study was designed to investigate the protective effect of dietary nutrients against cadmium-induced hepatic and renal toxicities in male albino rats. The animals were randomly divided into eleven groups where the control group (Group I) received physiological saline (p.o.) and Group II was administered with cadmium chloride (2 mg/kg, s.c.) only. Groups III, IV, V, VI, VII, VIII and IX received 10 mg/kg dietary nutrients, i.e. thiamine, methionine, N-acetylcysteine (NAC), melatonin, zinc (Zn), vitamin E and cystine, respectively. Group X received a dose of 0.1 mg/kg of selenium (Se) and Group XI was administered with a combination of NAC, Zn, vitamin B1 and melatonin. All treatments were administered orally for 21 days with a concomitant subcutaneous (s.c.) cadmium treatment. Cadmium-intoxicated rats exhibited hepatic and renal toxicities as indicated by elevation of lipid peroxidation and marked decline in superoxide dismutase, glutathione peroxidase, alkaline phosphatase activities and total protein. However, a combined treatment with dietary nutrients, i.e. methionine, zinc, vitamin B1 and N-acetylcysteine ameliorated cadmium-induced lipid peroxidation and oxidative stress as they provoked the antioxidant defense system more significantly, when compared to each of them alone and hence is suggested as protective against cadmium-induced hepatic and renal toxicities.

D-galactose: a model of accelerated ageing sufficiently sensitive to reflect preventative efficacy of an antioxidant treatment.

Considering that the phenomenon of accelerated ageing contributes to early onset of various chronic diseases, modelling of the relevant dysregulated systems or responses is vital for research aimed at identification of potential therapeutic targets. Here, we aimed to establish a model capable of simulating the redox and inflammatory changes of accelerated ageing-specifically, the aim was early phase accelerated ageing, which would allow therapeutic intervention in a preventative approach prior to clinical disease manifestation. A secondary aim was to evaluate the sensitivity of the model to reflect preventative treatment efficacy. Daily D-galactose injections (250mg/kg body mass/day) for 8weeks in 9-week-old male Wistar rats induced a model of early accelerated ageing (decreased plasma FRAP; P < 0.05 and altered inflammatory signalling) and an aged profile in lymph node ultrastructure, but did not yet result in telomere shortening. Preventative daily oral antioxidant administration (grape seed-derived polyphenol, 100mg/kg body mass) prevented tissue ageing, beneficially modulated the inflammatory response, including neutrophil chemokinetic capacity, and tended to increase absolute telomere length. Data suggests that using a mild model of D-galactose administration than those employed to induce neurodegeneration, simulated the point where oxidative stress starts to overwhelm the endogenous antioxidant response and where a pro-inflammatory phenotype switch manifests. Furthermore, despite the expected small effect size, the model was sufficiently sensitive to reflect benefits of preventative antioxidant treatment in the context of ageing. This model presents a practical model for use in drug discovery, particularly in the context of preventative medicine aimed at limiting oxidative stress-associated ageing. Since this starting point of accelerated ageing as illustrated by current data, is not expected to reflect major ageing-associated changes yet, we recommend that future preventative drug discovery studies employ a longitudinal study design in order to clearly demonstrate the delay of this starting point by preventative strategies.

Effectiveness of Vitamin C and Vitamin E Antioxidant Combination on Caspase-3 Expression in Wistar White Rat Pulmonum Contusion

Introduction.Pulmonary contusions can cause a progressive inflammatory response. Activation of TNF-α cytokines and reactive oxygen species (ROS) can cause pulmonary cell death. Antioxidants can have the potential to neutralize ROS. The purpose of this study is to determine the effectiveness of antioxidant administration in maintaining pulmonary cell function in wistar rats that have been induced to experience pulmonary contusions through caspase-3 levels. Methods.This study was an in vivo experimental study conducted on thirty male wistar rats and divided into five groups (n = 6): control, pulmonary contusion + asthaxanthine 5 mg/kgBW, pulmonary contusion + vitamin C and E 50 mg/kgBW, pulmonary contusion + vitamin C and E 100 mg/kgBW, pulmonary contusion + vitamin C and E 200 mg/kgBW. The value of Caspase-3 is evaluated by the IHC. All data analyzes used SPSS 18. Results. Low doses of antioxidants have the potential to reduce pulmonary cell death in wistar rats induced by pulmonary contusions.Conclussion. Vitamin C and E effective to reduce polmonary cell death in pulmonary contusion.Keywords: antioxidants, vitamin C, vitamin E, pulmonary contusions animal model, apoptosis, caspase-3