Introduction:Depression is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with everyday life for one to several weeks. Several studies have shown that iron nanoparticles have neuroprotective and anti-inflammatory effects. This study aimed to evaluate anti-depressive effect of iron nanoparticles in male rats.Methods:Depression was induced by Lipopolysaccharide (LPS) adminstration. Rats were randomly assigned into six groups (10 in each group): 1) control (sterile saline solution; 200 μL, IP); 2) LPS (LPS;100 μg/kg, IP); 3) Low dose Iron Nanoparticle (LINP) (1 mg/kg, IP); 4) High dose Iron Nanoparticle (HINP), 5 mg/kg IP); 5) LPS/LINP (LPS; 100μg/kg IP+INP 1 mg/kg IP); and 6) LPS/HINP (LPS; 100 μg/kg IP+INP 5 mg/kg IP). All injections were performed every other day. To assess the effect of iron nanoparticles on depression symptoms, rats were subjected to two behavioral tests: Forced Swim Test (FST) and Open Field Test (OFT).Results:Iron nanoparticles treatment in 1 mg/kg and 5 mg/kg doses groups significantly improved depression symptoms when assessed by OFT and FST. In OFT, the number of line crossings, entrance to central square, rearing and duration of attending in central square increased after iron nanoparticles adminstration in depressed rats. Iron nanoparticles adminstration reduced immobility time confirmed by FST and OFT. Also, iron nanoparticles adminstration significantly increased duration of swimming in FST depressed rats.Conclusion:Our results for the first time showed potential advantageous effect of iron nanoparticles administration in attenuating depression symptoms, which was possibly mediated by modulation of neurotransmitters and anti-inflammatory effects of iron nanoparticles.
Background and Objectives: Capparis decidua is a plant used in herbal medicine. This study was carried out to assess effects of C. decidua hydroalcoholic extract on blood glucose, lipid profile and leptin in male rats with high-cholesterol diets. Materials and Methods: Totally, 40 Wistar-albino male rats with 200-250 g weight were equally divided into one control (C) and three experimental groups of high-cholesterol diet (HCD), high-cholesterol diet and lovastatin (HCDL) and high-cholesterol diet and C. decidua hydroalcoholic extract (HCDCD). At the end of the intervention, animals were sacrificed using deep anesthesia. Blood samples were collected and fasting blood sugar (FBS), high density lipoprotein (HDL), total cholesterol (TC), triglycerides (TG) and leptin were assessed. Low density lipoprotein (LDL) was calculated using Friedewald formula. Results were expressed as mean ±SE (standard error). The P<0.05 was considered as statistically significant. Results: Serum TG in HCDCD group significantly decreased, compared to C and HCD groups (71.33±3.55 (mg dl-1) instead of 97.55±7.09 (mg dl-1) and 94 ±7.01(mg dl-1) respectively, P=0.003) and TC in HCDCD group significantly decreased, compared to HCD group (67.66±2.65 (mg dl-1) instead of 83.11±5.25 (mg dl-1), P=0.021). Moreover, TC in HCDL group significantly decreased, compared to HCD group (68.33 ±1.88 (mg dl-1) instead of 83.11 ±5.25 (mg dl-1), P = 0.04). Leptin included the lowest value in HCDL group, compared to other groups (P<0.0001). Other parameters did not include significant differences within the groups. Conclusions: The current findings have demonstrated that hydroalcoholic extracts from C. decidua leaves and thin stems decreased serum TG and TC in HCDCD male rats.
Background: Since gold nanoparticle (AuNP) has shown anti-oxidant activity, this study was designed to assess the effect of AuNP on the liver toxicity induced by Carbon -Tetrachloride (CCl4) in rats.
Background: Addiction is known as a gradual process leading to the uncontrolled abuse of a substance. The main problem facing the practitioners is the high rate of return among abusers after stopping substance consumption. Deep brain stimulation (DBS) is considered as one of the methods for treating stimulant substance abuse, in which an electrical current is passed, typically at frequencies above 100 Hz, through electrodes implanted surgically in the subcortical brain nuclei. Objectives: The present study aimed to investigate the effects of high-frequency DBS (HF-DBS) applied to the medial prefrontal cortex (mPFC) on the electrical response of the accumbens nucleus as well as on the motor activity and dependency in morphine-addicted male rats. Methods: Experimental rats (n = 40) were assigned to five groups (n = 8), including saline, sham, morphine, saline+DBS, and morphine+DBS groups. The rats received DBS with a frequency of 130 Hz, amplitude of 0.2 to 0.5 mA, and repeated periods of 15 minutes with an interval of 45 minutes for 3 hours during the conditioning period in the conditioned place preference (CPP) box. Then, they were treated with saline or morphine and were subjected to stereotaxic surgery for insertion of the stimulator electrode in mPFC and the recorder electrode in AC. The electrical response of AC neurons to DBS was determined adopting the single unit recording method. Then, motor activities of different groups were assessed in order to evaluate the effects of DBS on animal movement activities. Finally, data analysis was performed using GraphPad Prism 8.1. Results: The injection of morphine enhanced the CPP score and reduced the average of spikes in the cortical neurons of the AC compared to those obtained in the sham group. These parameters were significantly decreased and increased in the animals receiving morphine+DBS compared to the morphine group, respectively. Moreover, a significant difference was observed between morphine+DBS group and morphine group in terms of the total traveled distance. Conclusions: The stimulation of the AC nucleus at high frequency reduced the addiction preference as well as enhanced the locomotor activity and primary neuron activity in the cortex of AC nucleus.
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