Orbitofrontal cortex and amygdalar over-activity is associated with an inability to use the value of expected outcomes to guide behaviour in serotonin transporter …

LJP Nonkes, K Tomson, A Mærtin, J Dederen… - Neurobiology of learning …, 2010 - Elsevier
A disturbance in 5-HT signalling can lead to maladaptive and disruptive behavioural changes
seen in neuropsychiatric disorders, potentially by 5-HT’s role in cognitive control over …

The interplay between brain 5-hydroxytryptamine levels and cocaine addiction

LJP Nonkes, IPG Van Bussel… - Behavioural …, 2011 - journals.lww.com
Cocaine addiction is a major health problem that affects millions of people. Cocaine acts by
inhibiting dopamine, noradrenaline and serotonin [5-hydroxytryptamine (5-HT)] reuptake. …

Improved cognitive flexibility in serotonin transporter knockout rats is unchanged following chronic cocaine self‐administration

LJP Nonkes, JHR Maes, JR Homberg - Addiction biology, 2013 - Wiley Online Library
Cocaine dependence is associated with orbitofrontal cortex (OFC)‐dependent cognitive
inflexibility in both humans and laboratory animals. A critical question is whether cocaine self‐…

Behavioural therapy based on distraction alleviates impaired fear extinction in male serotonin transporter knockout rats

LJP Nonkes, M de Pooter, JR Homberg - Journal of Psychiatry and …, 2012 - jpn.ca
Background: The “biological susceptibility” model posits that some individuals, by genetic
predisposition, are highly sensitive to environmental stimuli. Exposure to adverse stimuli leads …

Serotonin transporter knockout rats show improved strategy set-shifting and reduced latent inhibition

LJP Nonkes, IIGM van de Vondervoort… - Learning & …, 2012 - learnmem.cshlp.org
Behavioral flexibility is a cognitive process depending on prefrontal areas allowing adaptive
responses to environmental changes. Serotonin transporter knockout (5-HTT −/− ) rodents …

[HTML][HTML] Impaired fear extinction as displayed by serotonin transporter knockout rats housed in open cages is disrupted by IVC cage housing

L Shan, P Schipper, LJP Nonkes, JR Homberg - PloS one, 2014 - journals.plos.org
Anxiety disorders are influenced by both environmental and genetic factors. A well-known
example for gene x environment interactions in psychiatry is the low activity (s) allelic variant …

Serotonin transporter genotype x construction stress interaction in rats

P Schipper, LJP Nonkes, P Karel, AJ Kiliaan… - Behavioural brain …, 2011 - Elsevier
A well-known example for gene x environment interactions in psychiatry is the one involving
the low activity (s) allelic variant of the serotonin transporter (5-HTT) promoter polymorphism …

Quantifying lymphocyte vacuolization serves as a measure of CLN3 disease severity

…, BTA van den Broek, K van Veghel, LJP Nonkes… - JIMD …, 2020 - Wiley Online Library
Background The CLN3 disease spectrum ranges from a childhood‐onset neurodegenerative
disorder to a retina‐only disease. Given the lack of metabolic disease severity markers, it …

Perseverative instrumental and Pavlovian responding to conditioned stimuli in serotonin transporter knockout rats

LJP Nonkes, JR Homberg - Neurobiology of learning and memory, 2013 - Elsevier
Environmental stimuli can influence behavior via the process of Pavlovian conditioning.
Recent genetic research suggests that some individuals are more sensitive to environmental …

[HTML][HTML] The attribution of incentive salience to an appetitive conditioned cue is not affected by knockout of the serotonin transporter in rats

LJP Nonkes, IIGM van de Vondervoort… - Behavioural brain …, 2014 - Elsevier
Understanding the neurobiological basis underlying individual differences in conditioned
stimulus (CS) sensitivity is pertinent, given that excessive conditioned responses to CSs is a …