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Search Results: 1 - 10 of 461667 matches for " A. Ouichou "
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Maternal Separation Affects Mothers’ Affective and Reproductive Behaviors as Well as Second Offspring’s Emotionality  [PDF]
R. Bousalham, B. Benazzouz, A. El Hessni, A. Ouichou, A. Mesfioui
Journal of Behavioral and Brain Science (JBBS) , 2013, DOI: 10.4236/jbbs.2013.35042
Abstract: Daily separation of rat pups from their mothers while the preweaning period has an impact on behavior and stress response of pups. We hypothesized that maternal separation may create a depression-like state in mother rats from which we separate the rat pups and decrease their reproductive function and fertility. Also, we aimed to evaluate the transmission degree of depression and anxiety across generations. Females aged 3 months were divided in two groups of 10 rats each. After a first mating and a first parturition, we conducted maternal separation 3 h during 22 days for the experienced group while the control group mothers kept their pups. At 4 months of age, females underwent behavioral tests and a second mating. Second generation’s pups were also subjected to behavioral tests. Behavioral tests showed that mothers which experienced separation were more depressive and anxious than control ones, also they had a lower litter size. Rats pups of the second generation whose mothers experienced maternal separation also revealed behavior changes akin to depression and anxiety. Thus, maternal separation causes depressive and anxious-likestates on mother rats which experienced separation and has an impact on their litter size. Also, consequences of maternal separation seem to last throughout generations.
Impact of the Association of a High Fructose Diet and Chronic Mild Stress on Metabolic and Affective Disorders in Male Rat  [PDF]
Y. Chahirou, M. Lamtai, A. Mesfioui, A. Ouichou, M. Coulibaly, R. Boussekkour, A. El Hessni
Journal of Behavioral and Brain Science (JBBS) , 2018, DOI: 10.4236/jbbs.2018.84010
Abstract: An early unbalanced nutritional diet can induce affective disorders in adulthood. As well as stress in adolescence can accentuate these disorders. Both human and rat structural changes have been demonstrated in the hippocampus, likewise, oxidative stress may be involved in these disturbances. The objective of this study is to see the impact of a high-fructose diet (PN21) associated with chronic mild stress (CMS) at the end of adolescence (PN55) on metabolic and affective disorders in rats Wistar. This study was performed on four groups of male rats: control group, CMS for five weeks (PN55), fructose for ten weeks (PN21) and fructose for ten weeks (PN21) associated with CMS for five weeks (PN55). These animals underwent behavioral tests to evaluate their affective states (open field test, Sucrose preference test). After sacrifice, the dosage of glucose, triglycerides and total cholesterol was performed at the prefrontal cortex (CPF) and also at the hippocampus; the dosage of nitric oxide (NO) was performed, too. The bulk of our results show that fructose induces metabolic disturbances; the CMS induces a state of depression-like, while the association potentiated metabolic disturbances, depression-like state and also inducing anxiety. This study has shown that fructose and CMS can disrupt the various functions of the body and their association can potentiate these disturbances.
Affective Responses of Early Life Photoperiod in Male Wistar Rats  [PDF]
Nassira Benabid, Ali Ouichou
Neuroscience & Medicine (NM) , 2011, DOI: 10.4236/nm.2011.23025
Abstract: Behavior changes season dependant are probably linked to change in day length or photoperiod. Although much research on seasonality in small mammals has focused on photoperiod manipulations in adults, early life photoperiod is also an important source of seasonal information and can establish individual’s developmental trajectory by regulating somatic and reproductive development and affective responses to day lengths later in life. The experiments developed in this work are based on the hypothesis that early life photoperiod affect emotionality in adult rats. To cheek this hypothesis, male rats were exposed at birth to different photoperiods (LP: 16L/8D; SP: 8L/16D). 8, 16 or 24 weeks later, rats were subjected to different behavioral tests to quantify anxiety-like behavior. Independently of duration, rats exposed to SP exhibited higher levels of anxious-like behavior than rats raised in LP, in an open field test (OFT) and in elevated plus maze (EPM). Repeated comparisons showed that photoperiod effect was accentuated after 16 weeks of treatment. 24 weeks of treatment failed to induce any effect on emotionality in male rats. Our results indicate that changes in day length are associated with different levels of anxious-like behaviors; consistent with the conjecture that early life photoperiod may influence affective behavior in adult male rats.
Preventive Effects of Flaxseed and Sesame Oil on Bone Loss in Ovariectomized Rats
S. Boulbaroud,A. Mesfioui,A. Arfaoui,A. Ouichou
Pakistan Journal of Biological Sciences , 2008,
Abstract: A study was designed to examine the effects of dietary flaxseed oil (FO) and sesame oil (SO) which are rich successively in n-3 and (n-9 and n-6) on biochemical parameters and histological status of bone. Sixty-four 90-day-old female wistar rats were randomly assigned to 6 groups: sham-operated rat (sham)+ control diets, ovariectomized rat (OVX))+ control diets, OVX+ 7% FO, OVX+ 7% SO, OVX+ 10% FO, OVX+ 10% SO. After 4 weeks of treatments, rats were euthanized; blood and tissues were collected for analyses. Markers of bone formation which is alkaline phosphatase activity and markers of bone resorption which is tartrate resistant acid phosphatase activity were measured. Present results showed that OVX increased significantly ALP and TRAP activity and the examination of bone tissue showed disruptive and lytic bone trabeculae. Animals fed 10% FO and 10% SO of fat reduced these parameters and improved bone microarchitecture. Whereas, there was no improvement in biochemical and histological states in OVX rats that received 7% of PUFAs successively provided from FO and SO diets. In conclusion, our results are encouraging because they suggest that PUFAs intake may help to prevent osteoporosis associated with estrogens deficiency. However, further studies are needed to determine the mechanism by which a diet rich in n-3 or lignans modulate bone tissue.
The Influence of Gonadectomy on Anxiolytic and Antidepressant Effects of Melatonin in Male and Female Wistar Rats: A Possible Implication of Sex Hormones  [PDF]
El Mrabet Fatima Zahra, Lagbouri Ibtissam, Mesfioui Abdelhalim, El Hessni Aboubakr, Ouichou Ali
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.32021
Abstract: The main objective of this study was to analyze the effects of sex, ovariectomy (Ovx) and orchidectomy (Orx) on antidepressant and anxiolytic effect of melatonin in forced swimming test, open field test and elevated plus maze test. Initially, 4 mg/kg of melatonin was daily administered, at 4:00 pm, to intact male and female rats during 8 weeks. Our results have shown that the effect of chronic injection of Mel is sex dependent in the three behaviors tests. Females rats have responded better than males in behavior test study after administration of melatonin, this difference between the sexes may be related to the action of sex hormones (androgens and estrogens) on behavior in males as well as in females. Secondly, to determine the possible interaction between Melatonin and steroid hormones, Ovx/sham female received Mel at dose of 4mg/kg alone or NaCl (0.9%) alone, and Orx/sham male received Mel at dose of 4 mg/kg alone or NaCl (0.9%) alone daily and during 8 weeks of treatment at 4:00 pm. All animals were tested in the open-field test, elevated plus maze test for anxiety behavior study, and forced swimming test for depression behavior study. Results revealed that Mel exerts an anxiolytic and antidepressant effects in the orchidectomized males and in intact females, confirming that the suppression of androgens by orchidectomy improved anxiolytic and antidepressant effects of melatonin in males. However in females, the suppression of estrogen by ovariectomy masked the antidepressant and anxiolytic effects of melatonin. Our results confirmed that the antidepressant and anxiolytic effects of melatonin are linked to sex hormones.
Pinealectomy and Exogenous Melatonin Regulate Anxiety-Like and Depressive-Like Behaviors in Male and Female Wistar Rats  [PDF]
El Mrabet Fatima Zahra, Ouaaki Siham, Mesfioui Abdelhalim, El Hessni Aboubakr, Ouichou Ali
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.34049
Abstract: The main objective of this work was to 1) study the influence of endogenous melatonin (Mel) abolishment via pinealectomy and 2) explore exogenous Mel effect on anxiety-like and depressive-like behavior in male and female rats. Rats were shamoperated (Sh) or pinealectomized (Px) and following subgroups were selected 1) Px/NaCl (0.9%) and Sh/NaCl (0.9%) : rats injected subcutaneously, once daily for 8 weeks, with saline solution NaCl (0.9%) as vehicle; 2) Px/Mel (4 mg/Kg) and Sh/Mel (4 mg/Kg): Rats similarly injected with 4 mg/Kg of Mel. All animals were housed under a photoperiod of (LD:16/8). After different treatments animals were tested in the open-field test (OFT), elevated plus maze test (EPM) to determine anxiety-like behavior, and forced swimming test (FST) to evaluate depressive-like level. Our results revealed that level of anxiety-like and depressive-like behavior are significantly higher in Px/NaCl (0.9%) when compared to Sh/NaCl (0.9%) group, suggesting that pinelectomy induced an anxiogenic and depressant effects. The Px effects would be due to the absence of endogenous Mel synthesis and release. Additionally, we clearly demonstrated that the level of anxiety-like and depressive-like behavior are higher in Px/Mel (4 mg/Kg) and Sh/Mel when compared respectively to Px/NaCl (4 mg/Kg) and Sh/NaCl groups suggesting an anxiolytic and antidepressant effects of exogenous Mel. Behavioral responses were sex dependent since the difference between females and males, especially, after melatonin administration, were statistically significant. These experiments provide evidence that pinealectomy and Mel regulated emotionally behavior in male and female rats.
Synthesis and Influence of Two Quinoxalinone Derivatives on Anxiety- and Depressive-Like Responses in Wistar Rat  [PDF]
Redouan Nakache, Brahim Lakhrissi, Fatima Zahra El Mrabet, Aboubaker Elhessni, Ali Ouichou, Bouchra Benazzouz, Abdelhalem Mesfioui
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.34039
Abstract: Two new quinoxalinone derivatives have been synthesized adopting the HONG method, and investigated for some neuropharmacological effects (anxiety- and depressive-like responses) in rats. The present experiment sought to determine whether treatment with these compounds produces changes in affective responses. We found that the chronic injection of 6-nitro-2(1H)-quinoxalinone (NQu) showed obvious anxiolytic- and antidepressant-like effects, respectively, measured in the behavioral tests of Elevated Plus Maze (EPM) and Forced Swim Test (FST). At the dose of 30 mg/kg, NQu showed a comparative anxiolytic-like effect in rats as diazepam (Dz) (1 mg/kg), and a comparative antidepressant effect as clomipramine (Clmp) (2 mg/kg; i.p). The 2(1H)-quinoxalinone (Qu) significantly reduced depressive-like responses as evaluated in FST, whereas no anxiolytic-like effect was found as measured by open field test (OF). Additionally, the locomotor activity levels were unaffected by treatment as measured by OF and EPM.
Conversion of L-Tryptophan into Melatonin Is the Possible Action Pathway Involved in the Effect of L-Tryptophan on Antidepressant-Related Behavior in Female Rats: Analysis of the Influence of Treatment Duration  [PDF]
Sihame Ouakki, Fatima Zahra El Mrabet, Aboubaker El Hessni, Abdelhalem Mesfioui, Paul Pévet, Ali Ouichou
Journal of Behavioral and Brain Science (JBBS) , 2013, DOI: 10.4236/jbbs.2013.34036
Abstract: The aim of this study was to determine the effect of pharmacological doses of melatonin (MEL) and L-tryptophan (L-TRP) on depression-like behavior in female rats submitted to the forced swimming test (FST) after 2, 4, 6 or 8 weeks of treatment. This will allow exploring the different mechanisms of L-TRP actions particularly that due to its conversion into MEL. For this purpose, four groups of 24 rats each were constituted; (Group 1: Control): received saline solution NaCl (0.9%), (Group 2: MEL4): received 4 mg/Kg of MEL, (Group 3: L-TRP4): received 4 mg/Kg of L-TRP and (Group 4: L-TRP20): received 20 mg/Kg of L-TRP. Animals of each group were distributed on 4 subgroups of 6 rats submitted to different time treatments. The duration of immobility (TIM) and struggling period (TST) of rats in FST were measured after 2, 4, 6 and 8 weeks of drug treatment and the effects of MEL and L-TRP were compared. Chronical administration of different doses of MEL or L-TRP failed to induce any anti-depressant activity in rats subjected to FST after 2 weeks of treatment. However, after 4 weeks, daily administration of MEL at 4 mg/Kg significantly reduced the immobility period and enhanced struggling time. After 6 weeks, MEL at 4 mg/Kg and L-TRP at 20 mg/Kg were both effective in reducing immobility and increasing struggling movement, their effects being statistically comparable. All treatments were able to significantly reduce immobility time and increase struggling duration after 8 weeks, but L-TRP at 4 mg/Kg was less
Evaluation of Acute Toxicity and Sedative Effects of Ethylic Extract of Thymelaea lythroides in Wistar Rats  [PDF]
Inssaf Berkiks, Abdelhalem Mesfioui, Abdrahim Kribii, Ali Ouichou, Bouchra Benazzouz, Aboubaker El Hessni
Journal of Behavioral and Brain Science (JBBS) , 2014, DOI: 10.4236/jbbs.2014.43016
Abstract: The purpose of this study was to evaluate the acute toxicity and sedative effect of the ethylic extract of Thymelaea lythroides (Tl) on Wistar rats. The study was based on the gavage administration of the ethylic extract of Tl with different doses (i.e. 200, 400, 500 and 5000 mg/kg), where the toxicity and the sedative activity of the plant were observed and the obtained results were analyzed using the ANOVA test followed by the Bonferroni test. The main results of this study showed that the lethal dose of the ethylic extract of Tl was higher than the 5000 mg/kg dose. Moreover, when compared to the control rats, the animals treated with 5000 mg/kg of the extract exhibited significant reduction in appetite for food and water in the first week. Furthermore, results of the psychotropic test conducted during this study showed visible effects on the exploratory activity of the rats. The dose of 5000 mg/kg was also found to have a significant central nervous system effect; the locomotor activities of the animals decreased in a manner similar to those administered with Zepam as control.
Melatonin and Diazepam Affect Anxiety-Like and Depression-Like Behavior in Wistar Rats: Possible Interaction with Central GABA Neurotransmission  [PDF]
Sihame Ouakki, Fatima Zahra El Mrabet, Ibtissam Lagbouri, Aboubaker El Hessni, Abdelhalem Mesfioui, Paul Pévet, Etienne Challet, Ali Ouichou
Journal of Behavioral and Brain Science (JBBS) , 2013, DOI: 10.4236/jbbs.2013.37055
Abstract: Recent studies have shown the importance of the GABA-ergic transmission in the pathophysiology of anxiety and depressive disorders in humans. Our present study aims to investigate the interaction of melatonin (MEL) with this system by exploring the effects of MEL with or without a facilitator of GABA-ergic neurotransmission, diazepam (DZ) on the levels of depression and anxiety in Wistar rats. For this purpose, different doses of MEL (2, 4 or 16 mg/kg) or DZ (2 mg/kg) are subchronically administered during 15 days. After pharmacological treatments, anxiety levels are evaluated in behavioral tests of Open Field (OFT) and elevated plus maze (EPM) and depression levels are evaluated by the forced swim test (FST). The results showed that MEL produces anxiolytic-like and antidepressant-like effects in a dose-dependent manner; the maximum effect was obtained at a dose of 16 mg/kg. However, a dose of 4 mg/kg is necessary to induce an effect. The effect of MEL and DZ reported in this study concerns selective modulation of behavioral anxiety and depression since locomotor activity assessed by the OFT and EPM was not affected. The subchronic injection of MEL at 4 mg/kg, DZ at 2 mg/kg or the two combined molecules also induces also anxiety-like and antidepressant-like behavior. In addition, a potentiating effect between MEL and DZ was observed. These effects suggest that psychopharmacological actions of MEL are due, at least in part, to its ability to improve the central GABA-ergic transmission.
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