Saturday, November 4, 2006

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efficacy of triptans in migraine menstrual

menstrual migraine affects approximately 50-60% of women who suffer from migraines, but knowledge about the role of hormones, particularly estrogen, is yet to be defined in a comprehensive manner. Researchers at Vanderbilt University School of Medicine in Nashville (USA) conducted a systematic review aimed to determine the role of hormones menstrual migraine. From the literature, we selected 643 articoli.L 'influence of estrogen in migraine is evident by the fact that women have an incidence of migraines three times more than men, and significant changes in the incidence of migraine in female reproductive function of the state. The menstrual migraine is generally more resistant to treatment, usually not associated with aura, is long lasting and, in general, involves a greater functional disability compared with attacks occurring at other times of the month. The genetic and biochemical evidence indicates a central and peripheral role of estrogen in the pathophysiology of menstrual migraine, with potential interactions with excitatory circuits, including serotonergic components. Although there is no evidence regarding the use of estrogen as a preventative treatment of menstrual migraine, serotonin receptor agonists (triptans) have a deep relief and may also have a preventive role. In conclusion: the epidemiological evidence, clinical and pathophysiological correlates estrogen migraine. Triptans appear to significantly alleviate the pain and can also be used as a preventive measure.
Brandes JL, JAMA 2006, 295: 1824-1830

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Encouraging results for creatine and minocycline in Parkinson's disease in early

A study by NINDS NET-PD Investigators evaluated whether minocycline creatine el'antibiotico were able to alter the course of Parkinson's disease at an early stage. Participants had been diagnosed with Parkinson's disease for less than 5 years and do not require treatment for the symptoms. The primary endpoint was the change to the scale UPDRS (Unified Parkinson's Disease Rating Scale) from baseline at the time was found sufficient to establish disability symptomatic therapy for Parkinson's disease, or 12 months. A total of 200 patients were randomized in 1:1:1 ratio to receive creatine 10g/die, Minocycline 200 mg or placebo. The futility threshold was defined as a 30% reduction in the progression of the UPDRS scale compared to the placebo arm / DATATOP tocopherol in the study (Deprenyl And Tocopherol Antioxidative Therapy of Parkinsonism). A p value less than or equal to 0.1 index was futility. E 'was observed that neither creatine nor minocycline may be considered futile therapy based on the threshold of futility DATATOP. Tolerability was 91% in the creatine group and 77% in the minocycline group. The most common side effects were: respiratory symptoms (26%), joint pain (19%), nausea (17%). According to the authors, is that the creatine minocycline should be assessed in phase III clinical trials to determine if they are able to change the long-term progression of Parkinson's disease.
NINDS NET-PD Investigators, Neurology 2006; Published online before print

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Indiplon in the treatment of insomnia

Indiplon is a non-benzodiazepine sedative-hypnotic in the short duration of action. It 's a high-affinity allosteric enhancer of GABA-A receptor. E 'Indiplon has been shown that it binds to specific binding sites for BZ1 or GABA-A receptor alpha 1, differing from the classic benzodiazepines. A phase III To evaluate the efficacy and safety of Indiplon, immediate-release formulation, in 200 adult patients with chronic primary insomnia over a period of 35 days. Indiplon showed a statistically significant improvement nell'end primary endpoint of Latency to Persistent Sleep (LPS), a measure obtained by polysomnography. Treatment with LPS Indiplon 10mg reduced to 28 minutes (p <> Q). Rebound insomnia was not observed. A second phase III clinical trial with immediate-release Indiplon showed the achievement of primary and secondary end points in 593 subjects with transient insomnia. The primary end point was represented by Latency to Persistent Sleep (LPS), while the end secondary endpoint was to Latency to Sleep Onset (LSO). The improvements mean nell'end primary endpoint were 36% and 50% for the 10mg dose and 20mg, respectively. Patients also presented an improvement of Sleep Quality for both doses.
Source: Neurocrine Biosciences, 2006

Wednesday, September 13, 2006

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varenicline, a drug for smoking cessation

Varenicline (Champix ) is a partial agonist of the nicotinic receptor alpha4-beta2. The effectiveness of varenicline has been evaluated in two placebo-controlled clinical trials in about 2000 smokers. These subjects were randomly assigned to receive varenicline 1mg twice a day, bupropion 150mg 2 times daily, or placebo for 12 weeks. The follow-up period was 40 weeks (without treatment). 44% of patients treated with varenicline stopped smoking at the end of the treatment period of 12 weeks, compared with 30% of patients who quit after taking bupropion and 18% of those treated with placebo.Dopo 1 year, patients who received varenicline were significantly more likely to remain smoke-free than patients who received bupropion or placebo. In a third study, patients were treated with varenicline for 12 weeks, and then were randomly assigned to either placebo or varenicline for another 12 weeks. These patients were followed for 28 weeks after treatment. 71% of subjects taking varenicline were smoke-free after 6 months compared to 50% on placebo.

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Effects of Cannabis on neurodevelopmental

The developing brain is susceptible to the effects of exogenous cannabinoids both during the perinatal period (through the use of cannabis by the mother) and adolescence. Perinatal exposure data in animals and humans have shown an effect Cannabis on certain features, including: specific cognitive deficits, especially in visuospatial function, impulsivity, inattention and hyperactivity, symptoms of depression. Animal studies have shown that the systems of motor control, neuroendocrine function and nociception can be affected by cannabis. Fetal studies have shown that these effects are due to influences mediated by cannabinoids on neurotransmitter systems based on the dopamine and the opioids. Cannabinoids during adolescence produce deleterious effects on the cognitive system, symptoms of depression, schizophrenia and substance use disorders. Sex-specific differences were observed both in human studies than in those animals.
Sundram S et al, Hum Psychopharmacol 2006; 21: 245-254

Thursday, June 29, 2006

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European Union: the approved anti-obesity drug Acomplia

Sanofi Aventis announced that the European Commission has approved the marketing of anti-obesity drug Acomplia (active ingredient: rimonabant). E 'approved, the dose of 20mg. The first launch of the drug is expected in Britain in July. You will then be introduced in Denmark, Ireland, Germany, Finland and Norway, during the second half of 2006. Acomplia is indicated in obese patients (body mass index, BMI, greater than or equal to 30kg/m2) or overweight patients (BMI> 24kg/m2) with associated risk factors (diabetes type 2, dyslipidemia).

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Migraine: attack frequency and severity of conditions are related to body mass index

Researchers at Albert Einstein College of Medicine in New York have made a survey to analyze the influence of body mass index (BMI, body mass index) on the prevalence, attack frequency and clinical features migraine. The study population was based on telephone interviews that allowed to obtain information about the headache, the height and weight of 30,215 participants. The enrolled subjects were divided into five categories according to their BMI: underweight (BMI < or =" 1.3" or =" 2.9" or =" 5.7" or =" 1.9">
ME Bigal et al, Neurology 2006, 66: 545-550

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The effect of homeopathic treatment on mental symptoms of patients with generalized anxiety disorder did not differ from placebo

Researchers at the Department of Psychiatry at Hadassah University in Jerusalem in Israel have assessed the 'effect of homeopathic treatment in generalized anxiety disorder. A total of 44 patients with generalized anxiety disorder according to DSM-IV were randomly assigned to receive for 10 weeks a homeopathic remedy, individualized, or placebo. 39 patients completed the study. E 'was observed a significant improvement in Most rating scales, including the HAM-A (Hamilton Rating Scale for Anxiety) and the group treated with the homeopathic remedy that with placebo.
Bonne O et al, J Clin Psychiatry 2003; 64: 282-287

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Implications of cannabinoids in diseases neurological

Preparations of Cannabis sativa (marijuana) are used for many centuries both for medical purposes and for recreational use. Recent advances in understanding of the pharmacological properties especially of delta9-tetrahydrocannabinol (Delta9-THC) and the physiological roles of endocannabinoids led to the development of new strategies in the treatment of psychiatric disorders and neurological ones. Potential uses of cannabinoid receptor antagonists include the management of spasticity and tremor in multiple sclerosis and spinal injury, pain, inflammatory disorders, glaucoma, bronchial asthma, cancer and vasodilation associated with the advanced form cirrhosis. Of CB1 receptor antagonists have, however, therapeutic potential in Parkinson's disease.
Alsasua Del Valle A, Cell Mol Neurobiol 2006

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A gene Reverte Parkinson's disease in an animal model

aggregates of alpha-synuclein are characteristic of Parkinson's disease. Researchers at the Whitehead Institute in Cambridge (USA) evaluated whether to prevent the formation of these aggregates corresponded less neuronal death. In collaboration with the University of Missouri (USA), researchers have shown that a mutated form of alpha-synuclein destroyed a transport protein causing the death of neurons. Researchers have identified a gene that increases the production of the transport protein. In animal models it was observed that the gene is able to revert the symptoms of Parkinson's disease.
Fonte: Science, 2006

Tuesday, May 23, 2006

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Biol Psychiatry. 2005 Jul 15;58(2):158-64.

Vaccine pharmacotherapy for the treatment of cocaine dependence.
Martell BA , Mitchell E , Poling J , Gonsai K , Kosten TR .Section of General Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.bridget.martell@yale.edu
BACKGROUND: Cocaine abuse has no established pharmacotherapy, but active immunotherapy with a cocaine vaccine shows promise as a therapeutic intervention. METHODS: An open label, fourteen week, dose-escalation study evaluated the safety, immunogenicity, and clinical efficacy of a novel human cocaine vaccine (TA-CD) in eighteen cocaine dependent subjects. Ten subjects (400 microg total dose group) received four-100 microg injections over the course of eight weeks. Subsequently, eight subjects (2000 microg total dose group) received five-400 microg vaccinations over twelve weeks. Intent to treat analysis of thrice weekly urine toxicologies and cocaine antibody titers were compared. RESULTS: Sixteen of 18 subjects completed the study. There were no serious adverse reactions and the vaccine was well tolerated. The 2000 microg total dose group had a significantly higher mean antibody titer response (2000 units) as compared to the 400 microg total dose group (1000 units) (p = .05). The 2000 microg group was more likely to maintain cocaine free urines than those in the 400 microg group (Z = -3.12, p = .002). Despite relapse in both groups, most reported an attenuation of cocaine's usual euphoric effects at the six month follow-up time points (63% in the 400 microg and 100% in the 2000 microg groups). CONCLUSIONS: The conjugated cocaine vaccine was well tolerated and cocaine specific antibodies persisted at least six months. The likelihood of using cocaine decreased in subjects who received the more intense vaccination schedule.

Saturday, May 13, 2006

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Soggetti con sintomi nell’infanzia di ansia e depressione sarebbero più inclini the use of ecstasy

Researchers Erasmus Medical Center / Sophia Children's Hospital in Rotterdam have evaluated whether the use of ecstasy (3,4-methylenedioxymethamphetamine, MDMA) is preceded by symptoms of behavioral problems and emotional childhood and early adolescence. The study, prospective, involved 1580 subjects followed for up to a period of 14 years, from pediatric to adulthood. The first evaluation was performed in 1983 before the onset of MDMA as a recreational substance in the Netherlands. E 'was observed that individuals with symptoms of anxiety and depression in childhood have a greater tendency to use MDMA in adolescence or young adulthood. MDMA promotes the feeling with other people, gives it produces euphoria and relaxation. Especially those with symptoms of anxiety and depression may be susceptible to these effects.
Huizink AC et al, BMJ 2006; 332: 825-828

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Sildenafil may be useful in Crohn's disease

according to researchers at 'University College London, the underlying cause of Crohn's disease would be opposed to that previously supported. At the base, there would be an alteration of innate immunity, rather than a hyperactive immune system. Crohn's disease is a chronic inflammatory bowel disease characterized by ulcers in the intestine. E 'and is considered an autoimmune disease currently treated with immunosuppressants. British researchers, led by Anthony Segal, have instead found that people with Crohn's disease have a weak immune system and non-responsive, unable to easily repair the damage in the intestine. The direction of blood flow in damaged cells is substantially reduced and the authors believe that a drug like sildenafil (Viagra, Revatio) could be useful in patients with Crohn's disease, because of its effect of stimulating blood flow. The researchers compared the immune system of patients with Crohn's disease with that of healthy individuals with minor damage (eg skin abrasions) and found differences in the number of neutrophils produced by the body to repair the damage in the intestine and skin. Healthy people have more neutrophils than patients with Crohn's disease, showing that the immune response in people with Crohn's is damaged. E 'was also evaluated the inflammatory response to bacteria (Escherichia coli). Patients with Crohn's disease were unable to destroy bacteria that penetrate the intestinal wall, because of the weakness of the immune system.
Source: The Lancet, 2006

Friday, May 12, 2006

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Europe, the CHMP recommended approval of Acomplia

The Advisory Panel (CHMP) (European Medicines Agency) gave a positive opinion for approval of Rimonabant (Acomplia) in the treatment of obesity (BMI greater than or equal to 30) or overweight (BMI greater than 27) with associated risk factors such as diabetes and dyslipidemia. Sanofi-Aventis said that rimonabant not only reduces body weight, but improves also glycosylated hemoglobin (HbA1c), raises levels of HDL cholesterol and reduces triglycerides. In the U.S., the FDA sent to Sanofi-Aventis an approvable letter for Acomplia, which includes additional documentation prior to approval.
Source: Sanofi-Aventis, 2006

Wednesday, May 10, 2006

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The effect of antidepressants in the homeostasis of glucose and insulin sensitivity

Researchers at Toronto University conducted a Medline search with the objective of evaluating the effect of antidepressant drugs glucose-insulin homeostasis. An analysis of the literature showed that serotonergic antidepressants such as fluoxetine, reduce hyperglycemia, normalize glucose homeostasis and increase insulin sensitivity, whereas some noradrenergic antidepressants such as desipramine, exert opposite effects. The dual mechanism of action of antidepressants such as duloxetine and venlafaxine do not appear to alter glucose homeostasis, whereas, for example, phenelzine, an MAOI, was associated with hypoglycemia and an increased rate of glucose disposal .
McIntyre RS et al, Export Opin Drug Saf 2006; 5: 157-168

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Agomelatine, an antidepressant melatonergico

Agomelatine (Valdoxan) is the first antidepressant melatonergic. The therapeutic efficacy of the drug was demonstrated in the treatment of major depressive disorder at a dose of 25mg/die. For its pharmacological profile, agomelatine does not induce side effects typical of other therapies, such as selective serotonin reuptake inhibitors (eg, gastrointestinal disorders, weight gain, serotonin syndrome and insomnia). A placebo-controlled study in patients with depressive disorder major, who compared the effects of agomelatine with those of venlafaxine (Efexor) on sexual dysfunction, have demonstrated a very favorable Agomelatine. In addition, the Agomelatine has proven to be as effective as venlafaxine. A placebo-controlled study evaluated the effect of abrupt cessation of treatment, highlighting the absence of withdrawal symptoms with agomelatine in contrast to that observed with paroxetine (Eutimil / Daparox / Sereupin / Seroxat). Agomelatine has also been shown to positively influence the abnormal circadian rhythms in depressed patients, significantly improving all phases of disturbed sleep and sleep quality, with a favorable impact Supervision throughout the day. The clinical trial data so far indicate that the Agomelatine represents a new approach to the treatment of depression, combining the effectiveness of a favorable safety profile and sleep regulation.
Rouillon F et al, Int Clin Psychopharmacol 2006; 21 Suppl 1: S31-S35