Ignite Creation Date:
2025-12-25 @ 12:44 AM
Ignite Modification Date:
2025-12-28 @ 7:32 PM
Study NCT ID:
NCT01390467
Status:
COMPLETED
Last Update Posted:
2012-01-30
First Post:
2011-07-07
Is Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Cognitive Impact of Paracetamol in Healthy Volunteers
Sponsor:
University Hospital, Clermont-Ferrand
Organization:
Study Overview
Official Title:
Cognitive Impact of Paracetamol in Healthy Volunteers
Status:
COMPLETED
Status Verified Date:
2012-01
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
ICP
Brief Summary:
Randomized study, double-blind, crossover, controlled versus placebo.
Detailed Description:
Paracetamol impact on cognitive processes has been until recently little studied in literature that presents conflicting results. Some authors do not describe any cognitive performance change (Bradley and Nicholson, 1987) but more recent studies (Ishida et al., 2007) report an interesting performance improvement in therapeutic doses of paracetamol.
This improved performance would use the serotonergic pathway that is involved in the analgesic mechanism of paracetamol as the investigators demonstrated in our laboratory on previous work (Pickering et al. 2006, 2008). However, non-therapeutic dose, instead, showed a deterioration of memory processes in animals which may be link to implication of Cyclooxygenases COX-2. Indeed, several studies have demonstrated (Sharifzadeh et al. 2005; Teather et al., 2005) that anti COX-2 (such as Celebrex) cause in animal a deleterious effect on memory, while an anti COX1 and 2 (as indomethacin) or an anti COX1 (as piroxicam) lead to no change. A dose-effect relationship is therefore suggested on animals. Furthermore, a recent study in healthy volunteers showed that paracetamol acts not only on pain but also on pain / stress in society in everyday life (" social pain ") (deWall et al., 2010). By fMRI, these psychologists have shown that the reduction of "social" pain is associated with a decrease in neuronal activity in brain regions that are involved in social processes but also those who are involved in pain processes (anterior cingulate cortex , anterior insula etc..). They also showed that paracetamol known for its painkillers properties may reduce the painful feelings of rejection or shelved in everyday life. The cognitive-emotional impact of paracetamol is even more interesting that the investigators now know that its metabolism could involve cannabinoids receptors, particularly CB1 in hippocampus and association cortex involved themselves in cognitive phenomena.
INSERM U766 team to which the investigators belong has proposed the following sequence from preclinical : 1) metabolism of acetaminophen in analgesic metabolite AM404 via FAAH enzyme, 2) AM404 acts indirectly on CB1 receptors, 3) strengthening of bulbo spinal descending pathways by the endocannabinoid system, 4) involvement of serotonergic receptors pain suppressors.
This protocol follows a pilot that the investigators completed (HOP clinicaltrial.gov NCT01053650, unpublished results yet) where the investigators studied the impact of 2g of paracetamol in healthy volunteers. The investigators showed a memory improvement, but with no placebo group, it has not been possible to conclude a significant impact of oral paracetamol. Thus, this protocol will allow us to better understand if paracetamol can affect some cognitive processes, particularly vigilance, memory and decision making.
In addition, the investigators will build a biological collection to assess the pharmacogenetic profile of subjects and, in a secondary objective, correlate it to cognitive characteristics of subjects.
This improved performance would use the serotonergic pathway that is involved in the analgesic mechanism of paracetamol as the investigators demonstrated in our laboratory on previous work (Pickering et al. 2006, 2008). However, non-therapeutic dose, instead, showed a deterioration of memory processes in animals which may be link to implication of Cyclooxygenases COX-2. Indeed, several studies have demonstrated (Sharifzadeh et al. 2005; Teather et al., 2005) that anti COX-2 (such as Celebrex) cause in animal a deleterious effect on memory, while an anti COX1 and 2 (as indomethacin) or an anti COX1 (as piroxicam) lead to no change. A dose-effect relationship is therefore suggested on animals. Furthermore, a recent study in healthy volunteers showed that paracetamol acts not only on pain but also on pain / stress in society in everyday life (" social pain ") (deWall et al., 2010). By fMRI, these psychologists have shown that the reduction of "social" pain is associated with a decrease in neuronal activity in brain regions that are involved in social processes but also those who are involved in pain processes (anterior cingulate cortex , anterior insula etc..). They also showed that paracetamol known for its painkillers properties may reduce the painful feelings of rejection or shelved in everyday life. The cognitive-emotional impact of paracetamol is even more interesting that the investigators now know that its metabolism could involve cannabinoids receptors, particularly CB1 in hippocampus and association cortex involved themselves in cognitive phenomena.
INSERM U766 team to which the investigators belong has proposed the following sequence from preclinical : 1) metabolism of acetaminophen in analgesic metabolite AM404 via FAAH enzyme, 2) AM404 acts indirectly on CB1 receptors, 3) strengthening of bulbo spinal descending pathways by the endocannabinoid system, 4) involvement of serotonergic receptors pain suppressors.
This protocol follows a pilot that the investigators completed (HOP clinicaltrial.gov NCT01053650, unpublished results yet) where the investigators studied the impact of 2g of paracetamol in healthy volunteers. The investigators showed a memory improvement, but with no placebo group, it has not been possible to conclude a significant impact of oral paracetamol. Thus, this protocol will allow us to better understand if paracetamol can affect some cognitive processes, particularly vigilance, memory and decision making.
In addition, the investigators will build a biological collection to assess the pharmacogenetic profile of subjects and, in a secondary objective, correlate it to cognitive characteristics of subjects.
Study Oversight
Has Oversight DMC:
Is a FDA Regulated Drug?:
Is a FDA Regulated Device?:
Is an Unapproved Device?:
Is a PPSD?:
Is a US Export?:
Is an FDA AA801 Violation?:
Secondary ID Infos
| Secondary ID | Type | Domain | Link | View |
|---|---|---|---|---|
| 2011-000662-35 | EUDRACT_NUMBER | None | View |