Francesco Leri

Blockade of stress-induced but not cocaine-induced reinstatement by infusion of noradrenergic antagonists into the bed nucleus of the stria terminalis or the central nucleus of the amygdala.

Understanding polydrug use: review of heroin and cocaine co-use.

The consequences of different "lapses" on relapse to heroin seeking in rats.

Effects of cocaine in rats exposed to heroin.

Heroin and cocaine co-use in a group of injection drug users in Montréal.

Methadone maintenance reduces heroin- and cocaine-induced relapse without affecting stress-induced relapse in a rodent model of poly-drug use.

Reconditioning of drug-related cues: a potential contributor to relapse after drug reexposure.

Ultra-low-dose naltrexone reduces the rewarding potency of oxycodone and relapse vulnerability in rats.

Reconditioning of heroin place preference requires the basolateral amygdala.

Effects of high-dose methadone maintenance on cocaine place conditioning, cocaine self-administration, and mu-opioid receptor mRNA expression in the rat brain.

Patterns of opioid and cocaine co-use: a descriptive study in a Canadian sample of untreated opioid-dependent individuals.

Reinstatement of conditioned reinforcing properties of cocaine-conditioned stimuli.

Using latent class analysis (LCA) to analyze patterns of drug use in a population of illegal opioid users.

High-dose methadone maintenance in rats: effects on cocaine self-administration and behavioral side effects.

Involvement of arginine vasopressin and V1b receptor in heroin withdrawal and heroin seeking precipitated by stress and by heroin.

Fos expression in mesocorticolimbic areas during heroin place conditioning.

Co-administration of opioid agonists and antagonists in addiction and pain medicine.

Unreinforced responding during limited access to heroin self-administration.

Inactivation of the ventromedial prefrontal cortex mimics re-emergence of heroin seeking caused by heroin reconditioning.

Steady-state methadone blocks cocaine seeking and cocaine-induced gene expression alterations in the rat brain.

Enhancing effect of heroin on social recognition learning in male Sprague-Dawley rats: modulation by heroin pre-exposure.

Antidepressant-like effects of paroxetine are produced by lower doses than those which produce nausea.

FAAH inhibitor, URB-597, promotes extinction and CB(1) antagonist, SR141716, inhibits extinction of conditioned aversion produced by naloxone-precipitated morphine withdrawal, but not extinction of conditioned preference produced by morphine in rats.

Reacquisition of heroin and cocaine place preference involves a memory consolidation process sensitive to systemic and intra-ventral tegmental area naloxone.

Effect of acute and repeated cocaine exposure on response matching capabilities of Sprague-Dawley rats responding for sucrose on concurrent schedules of reinforcement.

Excitotoxic lesions to the prefrontal cortex of Sprague-Dawley rats do not impair response matching.

Oxycodone dose-dependently imparts conditioned reinforcing properties to discrete sensory stimuli in rats.

Treatment-like steady-state methadone in rats interferes with incubation of cocaine sensitization and associated alterations in gene expression.

Effect of yohimbine stress on reacquisition of oxycodone seeking in rats.

The effects of acute and chronic steady state methadone on memory retrieval in rats.

Oral gavage in rats: animal welfare evaluation.

Co-sensitivity to the incentive properties of palatable food and cocaine in rats; implications for co-morbid addictions.

Nitric oxide and histone deacetylases modulate cocaine-induced mu-opioid receptor levels in PC12 cells.

Effect of food restriction on cocaine locomotor sensitization in Sprague-Dawley rats : Role of kappa opioid receptors.

Effects of post-training heroin and d-amphetamine on consolidation of win-stay learning and fear conditioning.

Involvement of dynorphin and kappa opioid receptor in yohimbine-induced reinstatement of heroin seeking in rats.

Animal studies trigger new insights on the use of methadone maintenance.

Suppression of hypothalamic-pituitary-adrenal axis by acute heroin challenge in rats during acute and chronic withdrawal from chronic heroin administration.

Cue-induced renewal of heroin place preference: involvement of the basolateral amygdala.

Effect of post-training administration of cocaine, diazepam and their combination on a win-stay task.

Drugs of abuse as memory modulators: a study of cocaine in rats.

Perseveration in the presence of punishment: The effects of chronic cocaine exposure and lesions to the prefrontal cortex.