Acetylcholine - Function of Acetylcholine - Acetylcholine receptor
How to Increase Acetylcholine Naturally by Ray Sahelian, M.D.

What you will find on this Acetylcholine page

Acetylcholine information
Choline supplement product
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Acetylcholine was the very first neurotransmitter to be identified back in the early 1900s. It is made simply from choline and a two-carbon molecule called acetyl. Dietary choline and phosphatidylcholine (also known as lecithin) serve as the sources of free choline for acetylcholine synthesis. Acetylcholine is a neurotransmitter present in the brain and the peripheral nervous system, and acetylcholine receptors are found widely throughout the body and brain. Acetylcholine plays numerous roles. In the brain, acetylcholine is involved in learning and memory. Acetylcholine also stimulates muscle tissue. Acetylcholine is involved in Alzheimer's disease. See Alzheimer for natural options. 

How to Increase Acetylcholine levels
Supplements such as choline and CDP-choline raise levels of acetylcholine. They are both available without a prescription.

Choline Bitartrate, 500 mg, formulated by Ray Sahelian, M.D.

Choline is an essential precursor of acetylcholine. It also helps in the production of lipotropic agents which converts fats into useful products and aids in the production of HDL (good) cholesterol. Choline is 100 % natural choline bound to tartaric acid, making it easier to absorb.

Choline Supplement 500 mg per capsules

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Subscribe to a FREE Supplement Research Update newsletter. Twice a month you will receive an email with a review of several new studies on various supplements and natural medicine topics and their practical interpretation by Ray Sahelian, M.D. We will mention research updates on acetylcholine when published.

 

Acetylcholine chemistry - Function of acetylcholine
Once produced, acetylcholine is stored in brain cells and released into the synaptic cleft upon stimulation. When released into the synaptic cleft, the enzyme acetylcholinesterase breaks acetylcholine back down into choline and acetyl. In Alzheimer’s disease, there is a shortage of acetylcholine, and one of the ways doctors have tried to increase the levels of this neurotransmitter is by prescribing drugs, such as tacrine and galantamine, that inhibit the enzyme acetylcholinesterase. An alternative to these drugs, a Chinese herbal extract called huperzine A, can also inhibit this enzyme. Galantamine is now available without a prescription.

Acetylcholine Research Update
Acetylcholine -induced vasodilation is mediated by nitric oxide and prostaglandins in human skin.
J Appl Physiol. 2005 Feb;98(2):629-32.
Acetylcholine can effect vasodilation by several mechanisms, including activation of endothelial nitric oxide synthase and prostaglandin (PG) production. In human skin, exogenous acetylcholine increases both skin blood flow (SkBF) and bioavailable nitric oxide levels, but the relative increase is much greater in SkBF than nitric oxide. This led us to speculate acetylcholine may dilate cutaneous blood vessels through PGs, as well as nitric oxide. To test this hypothesis, we performed a study in 11 healthy people. We conclude that a portion of the vasodilation effected by exogenous acetylcholine in skin is due to nitric oxide; however, a significant portion is also mediated by PGs. Acetylcholine chloride.

Cytidine and Uridine Increase Striatal CDP-Choline Levels Without Decreasing Acetylcholine Synthesis or Release.
Cell Mol Neurobiol. 2006 Apr 25;Ulus IH, Watkins CJ, Cansev M, Wurtman RJ.
Department of Pharmacology and Clinical Pharmacology, Uludag University Medical School, Bursa, Turkey.

Treatments that increase acetylcholine release from brain slices decrease the synthesis of phosphatidylcholine by, and its levels in, the slices. We examined whether adding cytidine or uridine to the slice medium, which increases the utilization of choline to form phospholipids, also decreases acetylcholine levels and release. These data show that cytidine and uridine can stimulate brain phosphatide synthesis without diminishing acetylcholine synthesis or release.

Proof of the mysterious efficacy of ginseng: basic and clinical trials: suppression of adrenal medullary function in vitro by ginseng.
J Pharmacol Sci. 2004 Jun;95(2):140-4.
The root of Panax ginseng C.A. MEYER has been reported to have an anti-stress action. Therefore, the effects of ginseng components on functions of adrenal medulla, which is one of the most important organs responsive to stress, were investigated in vitro. First, the components of ginseng were mainly divided into two fractions, that is, the saponin-rich and non-saponin fractions. The saponin-rich fraction greatly reduced the secretion of catecholamines from bovine adrenal chromaffin cells stimulated by acetylcholine, whereas the non-saponin fraction did not affect it at all. The protopanaxatriol-type saponins inhibited the Acetylcholine-evoked secretion much more strongly than the protopanaxadiol-type. On the other hand, the oleanane-type saponin, ginsenoside-Ro, had no such effect. Recent reports have demonstrated that the saponins in ginseng are metabolized and absorbed in digestive tracts following oral administration of ginseng. All of the saponin metabolites greatly reduced the Acetylcholine-evoked secretion. M4 was the most effective inhibitor among the metabolites. M4 blocked Acetylcholine -induced Na(+) influx and ion inward current into the chromaffin cells and into the Xenopus oocytes expressing human alpha3beta4 nicotinic Acetylcholine receptors, respectively, suggesting that the saponin metabolites modulate nicotinic Acetylcholine receptors followed by the reduction of catecholamine secretion. It is highly possible that these effects of ginsenosides and their metabolites are associated with the anti-stress action of ginseng.

Effect of combination of extracts of ginseng and ginkgo biloba on acetylcholine in amyloid beta-protein-treated rats determined by an improved HPLC.
Acta Pharmacol Sin. 2004 Sep;25(9):1118-23.
AIM: To determine the concentration of acetylcholine in amyloid beta-protein (Abeta) treated rats and offer a method determining acetylcholine as well. METHODS: A 1-month combination of extracts of ginseng and ginkgo biloba (Naoweikang) ig administration to rats was performed daily after bilateral injection of Abeta for each side into hippocampus. After decollation, homogenizing, and centrifuging and extracting, a high pressure liquid chromatographic (HPLC) method using electrochemical detection (ECD) combined with two immobilized enzyme reactors was used to determine acetylcholine in rat whole brain. RESULTS: With a mobile phase consisting of disodium hydrogen orthophosphate, tetramethylammonium chloride (TMACl), octanesulfonic acid sodium salt (OSA) and "Reagent MB" at a final pH of 8.0, acetylcholine was determined while removing the interfering choline in less than 10 min at a flow rate of 0.35 mL/min on a platinum (Pt) working electrode at a potential of +300 mV vs a solid-state palladium (Pd) reference electrode. Naoweikang significantly increased the level of acetylcholine in whole brain of Abeta treated rats. And a sensitive, selective and reliable method for routinely determining acetylcholine in rat whole brain was established in this study.

Distinct phenotypes of congenital acetylcholine receptor deficiency.
Neuromuscul Disord. 2004 Jun;14(6):356-64. Related Articles, Links
We contrast the phenotypes associated with hereditary acetylcholine receptor deficiency arising from mutations in either the acetylcholine receptor epsilon subunit or the endplate acetylcholine receptor clustering protein rapsyn. Mutational screening was performed by amplification of promoter and coding regions by PCR and direct DNA sequencing. We identified mutations in 37 acetylcholine receptor deficiency patients; 18 had acetylcholine receptor-epsilon mutations, 19 had rapsyn mutations. Mutated acetylcholine receptor-epsilon associated with bulbar symptoms, ptosis and ophthalmoplegia at birth, and generalized weakness. Awareness of distinct phenotypic features of acetylcholine receptor deficiency resulting from acetylcholine receptor-epsilon or rapsyn mutations should facilitate targeted genetic diagnosis, avoid inappropriate immunological therapy and, in some infants, prompt the rapid introduction of treatment that could be life saving.

Acetylcholine regulates ghrelin secretion in humans.
J Clin Endocrinol Metab. 2004 May;89(5):2429-33.
Ghrelin secretion has been reportedly increased by fasting and energy restriction but decreased by food intake, glucose, insulin, and somatostatin. However, its regulation is still far from clarified. The cholinergic system (with acetylcholine) mediates some ghrelin actions, e.g. stimulation of gastric contractility and acid secretion and its orexigenic activity. To clarify whether ghrelin secretion undergoes cholinergic control in humans, we studied the effects of pirenzepine (PZ), a muscarinic antagonist, or pyridostigmine (PD), an indirect cholinergic agonist, on ghrelin, GH, insulin, and glucose levels in six normal subjects. PD increased GH but did not modify insulin and glucose levels. PZ did not significantly modify GH, insulin, and glucose levels. Circulating ghrelin levels were increased by PD and reduced by PZ . The PD-induced ghrelin peak did not precede that of GH. In conclusion, circulating ghrelin levels in humans are increased and reduced by cholinergic agonists and antagonists, respectively. Thus, ghrelin secretion is under cholinergic, namely muscarinic, control in humans. The variations in circulating ghrelin levels induced by PD and PZ are unlikely to mediate the cholinergic influence on GH secretion. acetylcholine chloride acetylcholine function

Effects of cholinergic enhancement on visual stimulation, spatial attention, and spatial working memory.
Neuron. 2004 Mar 25;41(6):969-82.acetylcholine research
We compared behavioral and neural effects of cholinergic enhancement between spatial attention, spatial working memory, and visual control tasks, using fMRI and the anticholinesterase physostigmine. Physostigmine speeded responses nonselectively but increased accuracy selectively for attention. Physostigmine also decreased activations to visual stimulation across all tasks within primary visual cortex, increased extrastriate occipital cortex activation selectively during maintained attention and WM encoding, and decreased parietal activation selectively during maintained attention. Finally, lateralization of occipital activation as a function of the visual hemifield toward which attention or memory was directed was decreased under physostigmine. In the case of attention, this effect correlated strongly with a decrease in a behavioral measure of selective spatial processing. Our results suggest that, while cholinergic enhancement facilitates visual attention by increasing activity in extrastriate cortex generally, it accomplishes this in a manner that reduces expectation-driven selective biasing of extrastriate cortex. acetylcholine alzheimers and acetylcholine receptors

Low acetylcholine during slow-wave sleep is critical for declarative memory consolidation.
University of Lubeck, Ratzeburger Allee 160, 23538 Lubeck, Germany. acetylcholine
Proc Natl Acad Sci U S A. 2004 Feb 17;101(7):2140-4. Epub 2004 Feb 06. alzheimer's acetylcholine
The neurotransmitter acetylcholine is considered essential for proper functioning of the hippocampus-dependent declarative memory system, and it represents a major neuropharmacological target for the treatment of memory deficits, such as those in Alzheimer's disease. During slow-wave sleep (SWS), however, declarative memory consolidation is particularly strong, while acetylcholine levels in the hippocampus drop to a minimum. Observations in rats led to the hypothesis that the low cholinergic tone during SWS is necessary for the replay of new memories in the hippocampus and their long-term storage in neocortical networks. However, this low tone should not affect nondeclarative memory systems. In this study, increasing central nervous cholinergic activation during SWS-rich sleep by posttrial infusion of 0.75 mg of the cholinesterase inhibitor physostigmine completely blocked SWS-related consolidation of declarative memories for word pairs in human subjects. The treatment did not interfere with consolidation of a nondeclarative mirror tracing task. Also, physostigmine did not alter memory consolidation during waking, when the endogenous central nervous cholinergic tone is maximal. These findings are in line with predictions that a low cholinergic tone during SWS is essential for declarative memory consolidation. 

Acetylcholine and alzheimer's disease

Acetylcholine emails
Q. The description of Acetylcholine clearly states how it has been shown to improve brain function        and sex drive...nothing about appetite reduction was included. Are you aware of any?
   A. Acetylcholine probably has some mild appetite suppressing activity.

Q. i'm wondering if acetylcholine is directly available in a capsule form. i don't see it and am questioning whether it exists?
   A. Acetylcholine is not sold in capsule form, however, the precursor to acetylcholine, choline, is available in capsule form.

If you have hyperhidrosis or excessive sweating, you may with to avoid nutrients that increase acetylcholine levels such as choline.