The converse is also true. Anticholinergics increase concentration.
ahhh... No they don't. You don't ever ever ever want to take anti-cholinergics. They are often used in nootropics studies to test if a nootropic drug is powerful enough to *reverse* their negative effects on cognition.
http://en.wikipedia....AnticholinergicPossible effects [of anti-cholinergics] in the central nervous system resemble those associated with delirium, and may include:
* Confusion
* Disorientation
* Agitation
* Euphoria or dysphoria
* Respiratory depression
* Memory problems[2]
* Inability to concentrate
* Wandering thoughts; inability to sustain a train of thought
* Incoherent speech
* Wakeful myoclonic jerking
* Unusual sensitivity to sudden sounds
* Illogical thinking
* Photophobia
cAMP isn't a bad thing at all. It's just that it short circuits the prefrontal cortex, decreasing concentration. This is fine for the normal person at a normal dose of caffeine, but makes things difficult with those who have low levels of norepinephrine, like those with ADHD.
Ok "Short-Circuit" is not the most scientific term when talking about neuro-chem. I looked around for the caffiene + cAMP study and found this:
Mol Cell Neurosci. 2011 Apr;46(4):742-51. Epub 2011 Feb 19.
Sleep deprivation prevents stimulation-induced increases of levels of P-CREB and BDNF: protection by caffeine.
Alhaider IA, Aleisa AM, Tran TT, Alkadhi KA.
Source
Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, USA.
Abstract
It is well known that caffeine and sleep deprivation have opposing effects on learning and memory; therefore, this study was undertaken to determine the effects of chronic (4wks) caffeine treatment (0.3g/l in drinking water) on long-term memory deficit associated with 24h sleep deprivation. Animals were sleep deprived using the modified multiple platform method. The results showed that chronic caffeine treatment prevented the impairment of long-term memory as measured by performance in the radial arm water maze task and normalized L-LTP in area CA1 of the hippocampi of sleep-deprived anesthetized rats. Sleep deprivation prevents the high frequency stimulation-induced increases in the levels of phosphorylated-cAMP response element binding protein (P-CREB) and brain-derived neurotrophic factor (BDNF) seen during the expression of late phase long-term potentiation (L-LTP). However, chronic caffeine treatment prevented the effect of sleep-deprivation on the stimulated levels of P-CREB and BDNF. The results suggest that chronic caffeine treatment may protect the sleep-deprived brain probably by preserving the levels of P-CREB and BDNF.
Copyright © 2011 Elsevier Inc. All rights reserved.
Not bad...
Caffeine modulates CREB-dependent gene expression in developing cortical neurons.
Connolly S, Kingsbury TJ.
Source
Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA.
Abstract
The Ca(2+)/cAMP response element binding protein CREB mediates transcription of genes essential for the development and function of the central nervous system. Here we investigated the ability of caffeine to stimulate CREB-dependent gene transcription in primary cultures of developing mouse cortical neurons. Using the CREB-dependent reporter gene CRE-luciferase we show that stimulation of CREB activity by caffeine exhibits a bell-shaped dose-response curve. Maximal stimulation occurred at 10mM caffeine, which is known to release Ca(2+) from ryanodine sensitive internal stores. In our immature neuronal cultures, 10mM caffeine was more effective at stimulating CREB activity than depolarization with high extracellular KCl (50mM). Quantitative real-time PCR analysis demonstrated that transcripts derived from endogenous CREB target genes, such as the gene encoding brain-derived neurotrophic factor BDNF, are increased following caffeine treatment. The dose-response curves of CREB target genes to caffeine exhibited gene-specificity, highlighting the importance of promoter structure in shaping genomic responses to Ca(2+) signaling. In the presence of a weak depolarizing stimulus (10mM KCl), concentrations of caffeine relevant for premature infants undergoing caffeine treatment increased CRE-luciferase activity and Bdnf transcript levels. The ability of caffeine to enhance activity-dependent Bdnf expression may contribute to the neurological benefit observed in infants receiving caffeine treatment.
Do you have a pubmed link for the negative caffeine/camp interaction study?
Edited by abelard lindsay, 04 July 2011 - 05:32 AM.