Ameliorative Effect Of Curcumin Research Articles

Curcumin mitigates fenthion-induced testicular toxicity in rats: histopathological and immunohistochemical study

Fenthion is a widely used organophosphorus pesticide in agriculture that induces different cytotoxic effects, including male reproductive toxicity. The present work aimed to study the ameliorative effects of curcumin, a potential therapeutic agent against several chronic diseases, on reproductive toxicity induced by the organophosphate insecticide fenthion. Forty adult male albino rats were divided into four groups. The control group received distilled water. The curcumin group was administered curcumin at a dose of 100 mg kg−1 body weight. The fenthion group was administered fenthion at a dose of 0.001 mg kg−1. The fenthion/curcumin group was administered fenthion and curcumin together at the same doses. After four weeks of daily oral administration, the animals were sacrificed and their testes were excised. Specimens were processed for histopatholological and immunohistochemical investigations. Light and electron microscopic analysis visualised dramatic degenerative changes in seminiferous tubules as indicated by atrophy, necrosis, vacuolation and decreased number of spermatogenic cells. Moreover, the fenthion group showed a significant reduction in the proliferating cell nuclear antigen (PCNA)-immunoreactivity. Decreased PCNA-immunoreactivity reflected the depletion in the proliferation rate of spermatogenic cells and suggesting arrested spermatogenesis. Curcumin administration to fenthion-treated rats revealed mild degenerative changes with partial improvement of active spermatogenesis. In conclusion, these data may confirm the cytoprotective potency of curcumin against fenthion-induced cyto-toxicity.

Aluminium-Induced Oxidative Stress, Apoptosis and Alterations in Testicular Tissue and Sperm Quality in Wistar Rats: Ameliorative Effects of Curcumin.

Reproductive toxicity is a major challenge associated with aluminum (Al) exposure. No studies have evaluated the possible effects of curcumin (CUR) on Al-induced reproductive dysfunction. Therefore, this study investigated the effects of CUR treatment on Al-induced reproductive damage. In this experimental study, 40 male Wistar rats were allocated to the five groups (n=8) based on the treatment they received: no treatment (control), solvent [dimethyl sulfoxide (DMSO) or distilled water], CUR 10 mg/kg body weight (BW), Al chloride 10 mg/kg BW, and CUR+Al chloride (10 mg/kg BW/each alone). Treatments were performed by intraperitoneal (IP) injections for 28 days. The left testis was assessed for histopathological analysis as well as the incidence of germ cell apoptosis. One-way analysis of variance (ANOVA) followed by the Tukey's test was used. P<0.05 was considered significant. Significant reductions in body and testis weight; plasma testosterone and luteinizing hormone levels; sperm count, motility, morphology, and viability; germinal epithelium thickness; seminiferous tubules diameter; as well as, superoxide dismutase activity were observed in rats treated with Al. Moreover, Al exposure caused significant increments in the lumen diameter of tubules, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive cells and malondialdehyde (MDA) levels compared to the control group. However, in rats receiving CUR+Al, CUR significantly reversed the adverse effects of Al on testis and sperm quality. No significant differences in follicle-stimulating hormone (FSH) levels and nuclear diameter of spermatogonia were detected among all groups. It can be concluded that Al causes reproductive dysfunction by creating oxidative damage. CUR, on the other hand, reduces the toxic effects of Al and improves the antioxidant status and sperm quality in male rats.

Ameliorative Effect of Curcumin on Olanzapine-induced Obesity in Sprague-Dawley Rats.

Objective:To evaluate the effect of curcumin on olanzapine-induced obesity in rats.Materials and Methods:Sprague-Dawley (SD) rats were used for experiments. The animals were divided into six groups, namely, normal control, olanzapine control, betahistine (10 mg/kg), and curcumin 50, 100, and 200 mg/kg treated groups. Except the normal control group, all other animals were administered with olanzapine 4 mg/kg intraperitoneally to induce obesity. The drugs were administered once daily, per oral for 28 days. During the experiment, body weight changes and behavior alterations were monitored at regular intervals. At the end of the experiment, blood sample was collected from all the experimental animals for biochemical analysis. Part of the liver and kidney tissues was harvested from the sacrificed animals and preserved in neutral formalin for histopathological studies.Results:Curcumin showed a significant reduction in olanzapine-induced body weight gain on the rats and improved the locomotor effects. The effect of curcumin on olanzapine-induced body weight gain is not comparable with that of betahistine.Conclusion:This study has shown metabolic alteration effect of curcumin on olanzapine, an antipsychotic drug, treated SD rats.SUMMARY Olanzapine is an atypical antipsychotic drug used for the treatment of schizophrenia and bipolar disorder. Obesity is an adverse effect of olanzapine, and the present study was made an attempt to study the effect of curcumin on olanzapine-induced obesity in rats. In this present study, curcumin significantly reduced olanzapine-induced body weight gain in rats. Abbreviations Used: 5HT: 5-hydroxytryptamine, ALP: Alkaline phosphatase, ALT: Alanine transaminase, ANOVA: Analysis of variance, AST: Aspartate transaminase, CMC: Carboxymethyl cellulose, D: Dopamine, H and E: Hematoxylin and Eosin stain, H: Histamine, HDL-C: Highdensity lipoprotein cholesterol, IP: Intraperitoneal, MAO: Monoamine oxidase, NaOH: Sodium hydroxide, SD rats: Sprague Dawley rats, TCs: Total cholesterols, TG: Triglyceride.

Studies on the ameliorative effect of curcumin on carbofuran induced perturbations in the activity of lactate dehydrogenase in wistar rats.

Carbofuran is known to inhibit neurotransmission system of insects. The present study was undertaken to evaluate the possible ameliorative effect of curcumin on carbofuran induced alterations in energy metabolism in brain and liver of rats. The results demonstrate that carbofuran caused a significant inhibition of lactate dehydrogenase (LDH) activity in rat liver but an increase in LDH activity in the brain. Increased LDH activity was also observed in the serum indicating organ damage in treated animals. Carbofuran caused an increase in level of pyruvic acid in rat liver but a decrease in the brain. A decrease in the level of soluble protein was also observed in the tissues studied. Pretreatment of animals with curcumin resulted in significant amelioration of the altered indices. These results indicate that carbofuran at sub lethal concentrations may adversely alter energy metabolism in brain and liver of non-target mammalian systems. Pretreatment of animals with curcumin may exhibit a potential to mitigate the carbofuran induced toxicity.

Effects of GST Polymorphism on Ameliorative Effect of Curcumin and Carvacrol against DNA Damage Induced by Combined Treatment of Malathion and Parathion

Background: Organophosphorus pesticides has been widely used in agriculture fields to control various crop insects and their extensive use pose human life at threat because of their adverse effects on human health. In this study, we checked the effects of GST polymorphism on ameliorative effect of curcumin and carvacrol against DNA damages. Methods: Comet assay was used to assess the DNA damage and results were expressed as Tail moment. Heparinised fresh blood from healthy individuals was treated with combined concentration of malathion and parathion (i.e. 30 µg/ml of malathion and 2.5 µg/ml of parathion) in presence of combination of curcumin and carvacrol (25 µg/ml curcumin + 2.5 µg/ml carvacrol and 50 µg/ml curcumin + 5.0 µg/ml carvacrol) in order to observe the ameliorative role of curcumin and carvacrol. Multiplex PCR was performed for GSTM1 and GSTT1 genotyping. Results: Curcumin in combination with carvacrol (i.e. 25 µg/ml curcumin + 2.5 µg/ml carvacrol and 50 µg/ml curcumin + 5.0 µg/ml carvacrol) significantly reduced the DNA damage caused by combined action of malathion and parathion which supports their antigenotoxic property. No significant relationship of GSTT1 and GSTM1 polymorphism with genotoxicity of both the pesticides and antigenotoxic potential of curcumin and carvacrol was observed. Conclusion: Malathion and parathion were genotoxic in human PBL. Curcumin and carvacrol had an antigenotoxic effect against the malathion and parathion while there was not any significant effect of GSTT1 and GSTM1 polymorphism on genotoxicity of these pesticides and antigenotoxicity of curcumin and carvacrol.

Role of dopaminergic receptors and post synaptic signaling in arsenic induced neurotoxicity: Ameliorative effect of curcumin

Role of dopaminergic receptors and post synaptic signaling in arsenic induced neurotoxicity: Ameliorative effect of curcumin

Role of dopaminergic receptors and post synaptic signaling in arsenic induced neurotoxicity: Ameliorative effect of curcumin

Objectives: In view of increasing incidences of arsenic induced dopaminergic alterations, study has been carried out to investigate protective role of curcumin in arsenic induced alterations in dopamine receptor and post synaptic signaling in corpus striatum of rat brain.

Ameliorative Effects of Curcumin on Artesunate-Induced Subchronic Toxicity in Testis of Swiss Albino Male Mice.

India is one of the endemic areas where control of malaria has become a formidable task. Artesunate is the current antimalarial drug used to treat malaria, especially chloroquine resistant. The objective of the present study was to investigate the dose-dependent effect of oral administration of artesunate on the oxidative parameters in testes of adult male Swiss albino mice and ameliorative efficacy of curcumin, a widely used antioxidant. An oral dose of 150 mg/kg body weight (bwt; low dose) and 300 mg/kg bwt (high dose) of artesunate was administered for a period of 45 days to male mice, and ameliorative efficacy of curcumin was also assessed. The results revealed that artesunate caused significant alteration in oxidative parameters in dose-dependent manner. Administration of artesunate brought about significant decrease in activities of superoxide dismutase, glutathione, glutathione peroxidase, and glutathione reductase, whereas lipid peroxidation and glutathione-S-transferase activity were found to be significantly increased. The results obtained show that oxidative insult is incurred upon the intracellular antioxidant system of testis tissue by artesunate treatment. Further, administration of curcumin at the dose level of 80 mg/kg bwt along with both doses of artesunate attenuated adverse effects in male mice.

Ameliorative effect of curcumin on aflatoxin B1-induced changes in liver gene expression of Oreochromis niloticus

Ameliorative effect of curcumin on aflatoxin B1-induced changes in liver gene expression of Oreochromis niloticus

The Possible Ameliorative Effect of Curcumin on Atrazine-Induced Oxidative Stress, DNA Damage, Mitochondrial Dysfunction, and Apoptosis in the Kidney of Adult Male Albino Rats

Introduction: Atrazine (ATR), a worldwide triazine herbicide, induces oxidative stress and DNA damage. It was found that oxidative stress is closely linked to apoptosis. Curcumin has strong antioxidant, antimicrobial, anticancer and anti-inflammatory actions. Aim of the study: The aim of this study was to assess the possible ameliorative effect of curcumin on ATR- induced oxidative stress, oxidative DNA damage, mitochondrial dysfunction, and apoptosis in the kidney of adult male albino rats. Material and methods: The current study was conducted on 40 adult male albino rats. Rats were divided into four equal groups. The first group was control. Group II was treated with curcumin (100mg/kg/day). Group III was treated with ATR (400mg/kg/day). Group IV was treated with both ATR (400mg/kg/day) and curcumin (100mg/kg/day). All were given orally for 21days. Body and kidney weights, blood urea and creatinine as well as 24 hours urinary protein levels were measured. Levels of malondialdehyde (MDA), reduced glutathione (GSH), and 8-Hydroxy-2′-deoxyguanosine (8- OHdG) as well as activities of catalase (CAT), heme oxygenase-1 (HO-1) and complex-1 were assessed. Histopathological and immunohistochemical examination of renal tissue were carried out. Results: ATR treated group was significantly decreased in body and kidney weights, GSH level and HO-1 as well as complex 1 activities while there was significant increase in blood urea, creatinine, 24 hours urinary protein, MDA and 8-OHdG levels as well as CAT activity. Renal cloudy swelling was observed in H&E sections. Caspase 3 immunohistochemistry revealed high rate of apoptosis. Curcumin administration along with ATR significantly improved these observations. Conclusion: It was concluded that administration of curcumin along with ATR ameliorated oxidative stress, DNA damage, mitochondrial dysfunction and apoptosis induced by ATR. Recommendations: The current study recommend further studies to clarify issues related to human exposure to ATR and the ameliorative effect of curcumin in Egypt and elsewhere around the world.

DNA fragmentation, apoptosis and cell cycle arrest induced by sodium arsenite in cultured murine Sertoli cells: prevention by curcumin

Arsenic is a significant environmental concern worldwide, primarily due to geo physiochemical contamination of drinking water, and a major public health hazard in both developing and developed countries. The present study was aimed to investigate ameliorative effects of curcumin (Cur) against sodium arsenite (SA)-induced toxicity in cultured murine Sertoli cells. The cells were treated with SA (5 μM) and Cur (5 μg/ml and 10 μg/ml) alone or in combination for 12 hr. The SA treatment decreased cell viability, produced oxidative stress, and induced apoptosis as reflected by reactive oxygen species (ROS) generation, loss of mitochondrial transmembrane potential, DNA fragmentation, and apoptotic cells. Moreover, the SA-induced cell cycle arrest in the cells is characterized by a rise in the number of cells in the sub G1 phase of the cell cycle. The Cur was found to be effective in reversing all these arsenic (As)-induced cellular events. Data suggest that Cur modulates As-mediated oxidative stress, apoptosis, DNA fragmentation, and cell cycle arrest through suppression of excessive ROS generation. Evidence indicates that Cur may emerge as a useful protective agent against As-induced Sertoli cells toxicity by inhibiting As-induced damage in testes.

Ameliorative effect of curcumin on fluoxetine-induced reproductive toxicity and oxidative stress in male albino rats

Fluoxetine is a selective serotonin reuptake inhibitor used to treat depression and mood disorders. Curcumin, the major active ingredient of turmeric (Curcuma longa), showed many pharmacological effects and is known for its potent antioxidant capacity. The present work aims to evaluate the possible ameliorative effect of curcumin on fluoxetine-induced reproductive toxicity and oxidative stress in albino rats. Histological examination of testis of fluoxetine-treated rats revealed degeneration of spermatogenic cells, congestion of blood vessels and destruction of Leydig cells. In addition, speramatogenesis was inhibited as indicated by the decrease of the number of different spermatogenic cells. The diameters of the seminiferous tubules and heights of their germinal epithelium were significantly reduced. Moreover, significant higher numbers of Bax-positive Leydig cells were recorded. Testosterone, luteinizing hormone (LH) and glutathione (GSH) were decreased while malondialdehyde were increased in sera of fluoxetine-treated animals. Treating animals with fluoxetine followed by curcumin revealed an improvement in the histological changes observed in animals treated with fluoxetine. Moreover, curcumin treatment leads to decrease in the number of Bax-positive cells, increase in testosterone, LH, GSH, and decrease of lipid peroxidation. According to the present results, it can be concluded that combined treatment with fluoxetine and curcumin can improve the testicular abnormalities induced by fluoxetine. This effect of curcumin may be attributed to its antioxidant properties.

Curcumin Protects the Seminal Vesicles from Metronidazole‑induced Reduction of Secretion in Mice

Seminal vesicle secretion is important for increasing the stability of sperm chromatin, inhibition of the immune activity in the female reproductive tract and so on. Metronidazole (MTZ), a drug used for treatment of infections caused by anaerobic bacteria and protozoa, may have negative effects on the genital gland including the seminal vesicles. Curcumin exhibits antioxidant as well as anti-inflammatory properties. The present study aims to evaluate the negative effects of MTZ on the seminal vesicle structure and ameliorative effects of curcumin using stereological methods. Thirty balb/c mice were divided into six groups. The control group was received distilled water. The second and the third received higher doses of MTZ (500 mg/kg body weight/day) and MTZ (500 mg/kg/day) + 100 mg/kg/day curcumin, respectively. The fourth and the fifth were treated with lower doses of MTZ (165 mg/kg body weight/day) and MTZ (165 mg/kg body weight/day) + curcumin (100 mg/kg body weight/day), respectively. The sixth group received 100 mg/kg body weight/day curcumin. All the administrations were done by oral gavages for 14 days. After 30 days, seminal vesicles were removed. Stereological study of the seminal vesicle structure revealed a significant reduction in gland and vesicular fluid volume in MTZ-treated (higher or lower doses) animals. Curcumin protected the reduction of both parameters in therapeutic-dose treated animals. Metronidazole treatment does not induce structural changes in the seminal gland; however, it can have a significant impact on its secretion ability. Importantly, these deteriorations might be preventable by curcumin co-treatment.

Ameliorative effects of curcumin against renal injuries mediated by inducible nitric oxide synthase and nuclear factor kappa B during gentamicin-induced toxicity in Wistar rats

The ameliorative role of curcumin in attenuating gentamicin-induced nephrotoxicity has been reported earlier however, the mechanism of action remains unclear. Gentamicin was injected intraperitoneally (100 mg/kg body weight) once daily for 6 days. Curcumin was administered orally (200 mg/kg body weight) once daily for 7, 15 and 30 days. Gentamicin-induced rats showed significant increase in the levels of kidney markers and the activities of urinary marker enzymes, which was reversed upon curcumin treatment. A significant increase in kidney lipid peroxidation (LPO) and decrease in activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione-S-transferase (GST) and reduced glutathione (GSH) were observed in gentamicin-induced rats. Immunohistochemical, Western blot and RT-PCR studies in gentamicin-induced rats also demonstrated an increase in the levels of inducible nitric oxide synthase (iNOS) and nuclear factor-κB (NF-κB). All these effects induced by gentamicin were reduced upon treatment with curcumin in a time dependent manner. To conclude, curcumin enhances antioxidants, and decreases iNOS and NF-κB, thereby protecting the cells against oxidative stress induced by gentamicin.

Ameliorative effects of curcumin on the structural parameters of seminiferous tubules and Leydig cells in metronidazole-treated mice: A stereological approach

Metronidazole (MTZ), an anti-parasitic drug, induces negative effects on the testis. Curcumin exhibits antioxidant properties and anti-tumor properties. The aim was to evaluate negative effects of seminiferous tubules and Leydig cells by MTZ and ameliorative effects of curcumin. Balb/c mice were divided into six groups. The control, second, third, fourth and fifth, and sixth groups were administrated distilled water, high doses of MTZ (500 mg/kg/day), MTZ (500 mg/kg/day) +100 mg/kg/day curcumin, therapeutic doses of MTZ (165 mg/kg/day), MTZ (165 mg/kg/day) +100 mg/kg/day curcumin, and 100 mg/kg/day curcumin, respectively. The data revealed significant reduction in tubule volume, length and diameter and germinal epithelium height, and increase the number of Leydig cells in MTZ-treated (high or therapeutic doses) animals. Combined treatment of curcumin with high or therapeutic doses of MTZ ameliorated the increase in number of Leydig cell. Ameliorative effects of curcumin on the other above-mentioned parameters were observed in mice receiving therapeutic doses of MTZ. Leydig cell or nucleus volume and interstitial tissue volume did not show any significant difference in the MTZ-treated mice. It can be concluded that metronidazole can changes structural parameters of the tubules and number of Leydig cells and curcumin can ameliorate these effects.

Ameliorative effect of curcumin on hepatotoxicity induced by chloroquine phosphate

India is one of the most endemic areas, where malaria predominates and its control has become a formidable task. Chloroquine phosphate (CQ) on account of its rapid action on blood schizontocide of all the malarial parasite strains has become the most widely prescribed drug for prophylaxis and treatment of malaria. Toxicity of CQ is most commonly encountered at therapeutic and higher doses of treatment. Thus, the present study was undertaken to evaluate the protective effect of Curcumin, a herbal antioxidant obtained from Curcuma longa, on hepatic biochemical and histopathological status of CQ induced male mice. Swiss albino male mice were administered oral doses of CQ (100 mg/kg body wt., 200 mg/kg body wt. and 300 mg/kg body wt.) and CQ + curcumin (300 mg/kg body wt. + 80 mg/kg body wt.) for 45 days. A withdrawal of high dose treatment for 45 days was also studied. Administration of CQ brought about a significant decrease in Protein content with a decline in SDH, ATPase and ALKase activities, whereas ACPase activity was found to be significantly increased following CQ treatment. Antioxidant enzyme SOD registered a significant reduction as opposed to TBARS which was found to be elevated in a significant manner in the CQ treated groups as compared to control. Gravimetric indices (body weight and organ weight) declined significantly following CQ treatment. Administration of curcumin exhibited significant reversal of CQ induced toxicity in hepatic tissue. Protein content, SDH, ATPase, ALKase, ACPase, SOD, TBARS, body weight and organ weight were found to be comparable to that of control group after curcumin administration. Thus, obtained results led us to conclude the curative potential of curcumin against CQ induced hepatotoxicity.

Ameliorative Effects of Curcumin on the Seminiferous Epithelium in Metronidazole-Treated Mice

Metronidazole (MTZ) has negative effects on sperm analysis and testis structure. Curcumin is the principal curcuminoid found in turmeric and exhibits antitumor, anti-inflammatory, and anti-infectious activities with low toxicity. To evaluate stereological changes of seminiferous germinal epithelium by MTZ and ameliorative effects of curcumin, Balb-c mice were divided into 6 groups. The control, second, third, fourth, fifth, and sixth groups were administrated distilled water, high doses of MTZ (500 mg/kg/day), MTZ (500 mg/kg/day) + 100 mg/kg/d curcumin, therapeutic doses of MTZ (165 mg/kg/day), MTZ (165 mg/kg/day) + 100 mg/kg/day curcumin, and 100 mg/kg/day curcumin, respectively. Testis weight, testis volume, total epithelial volume, spermatocytes, and spermatid number showed a significant reduction in MTZ-treated (high or therapeutic doses) animals in comparison with the controls. Curcumin can protect spermatocytes after high or therapeutic doses of MTZ treatment. But curcumin is able to protect the other parameters only in the mice receiving therapeutic doses of MTZ. The total number of sertoli cells and spermatogonia did not show any significant difference in the mice that received MTZ. MTZ can reduce germinal epithelium volume and the number of spermatocytes and spermatids. Ameliorative effects of curcumin can mainly be observed in the mice receiving therapeutic doses of MTZ.