www.perpetualcommotion.com
"Give with a free hand, but give only
your
own."
-- J.R.R. Tolkien The Children
of Hurin
Memory Enhancement
I have nothing to sell you but
hope, and
that I give you for free.
The
"Gerbil food cocktail"
+ Choline [how much? From eggs, lecithin, or as a
supplement]
+ Uridine monophosphate [how much or from what alternative
source?
Brewer's yeast? Orotates?]
+ DHA [How much? From fish oil]
[Without having any further
guidance
on how much of each and how often,
and until we have more information, all we can do is go by
supplement
manufacturer's recommended dosages.]
DHA: Fish oil
Choline: Choline or "citi-choline" supplements, lecithin.
Uridine: Sugar beets, molasses (from sugar beets), tomatoes (0.5
to 1.0
g uridine per kilogram dry weight), brewer’s yeast (3% uridine
by dry
weight)[3], beer (from the yeast), broccoli, "orotates", organ
meats
(liver, pancreas, etc.).
I'm going to use fish oil, lecithin, and brewer's yeast for
myself. I
will use the recommended dose on the label.
Interestingly, for anyone battling depression, I found lots of
articles
from about 2006 saying that a combination of DHA (fish oil) and
uridine
was about as effective as Prozac.
Better than Prozac
Treating depression with common food
components might be as effective as using traditional drugs.
By Jason Feirman,
Psychology Today
published on March 01,
2005 -
last reviewed on February 13, 2007
...Membrane fluidity may be
especially
important for mitochondria, the little energy
factories found
inside all cells of the body, including nerve cells. Omega-3
acids seem
to boost the flexibility of mitochondrial membranes while
uridine
delivers raw material for the mitochondrial furnace...
http://www.psychologytoday.com/articles/200503/better-prozac
Here's a thread about this that appeared on the Alz.org message
board
back in July of 2008:
http://alzheimers.infopop.cc/eve/forums/a/tpc/f/762104261/m/4081064272?r=4531016513#4531016513
Here are the links to the articles and the associated journal
article:
Get Smart About What
You Eat And You
Might Actually Improve Your Intelligence
ScienceDaily (July 3,
2008)
New research findings
published
online in The FASEB Journal provide
more evidence that if we get smart about what we eat, our
intelligence
can improve. According to MIT scientists, dietary nutrients
found in a
wide range of foods from infant formula to eggs increase brain
synapses
and improve cognitive abilities... In the study, gerbils were
given
various combinations of three compounds needed for healthy
brain
membranes: choline, found in eggs; uridine monophosphate (UMP)
found in
beets; and docosahexaenoic acid (DHA), found in fish oils.
Other
gerbils were given none of these to serve as a baseline. Then
they were
checked for cognitive changes four weeks later.
http://www.sciencedaily.com/releases/2008/07/080702150706.htm
Cocktail Therapy For
Alzheimer's
Disease? Works for Gerbils
ScienceDaily (July 9,
2008) — A
dietary cocktail that includes a type
of omega-3 fatty acid can improve memory and learning in
gerbils,
according to the latest study from MIT researchers that points
to a
possible beverage-based treatment for Alzheimer's and other
brain
diseases... The cocktail has previously been shown to promote
growth of
new brain connections in rodents.
"It may be possible to use this treatment to partially restore
brain
function in people with diseases that decrease the number of
brain
neurons, including, for example, Alzheimer's disease,
Parkinson's,
strokes and brain injuries."
The researchers found that normal gerbils treated with the
mixture--a combination of DHA (a type of omega-3 fatty acid),
uridine
and choline--performed significantly better on learning and
memory
tests than untreated gerbils...
http://www.sciencedaily.com/releases/2008/07/080708155604.htm
Dietary uridine enhances the improvement
in learning and memory
produced by administering DHA to gerbils.
Sarah Holguin,
Joseph
Martinez, Camille Chow, and Richard Wurtman. FASEB
Journal, July
7, 2008
DOI: 10.1096/fj.08-112425
http://dx.doi.org/10.1096/fj.08-112425
The following article says that uridine does not come from the
diet,
but is produced by the liver. Hmmmm. Other sources
say you
can get uridine in the diet from things like sugar beets and
brewer's
yeast.
MIT Research Offers
New Hope For
Alzheimer's Patients
ScienceDaily (Apr. 27,
2006) —
CAMBRIDGE, Mass.--MIT brain researchers have developed a
"cocktail" of
dietary supplements, now in human clinical trials, that holds
promise
for the treatment of Alzheimer's disease... he three compounds
in the
treatment cocktail - omega-3 fatty acids, uridine and choline
- are all
needed by brain neurons to make phospholipids, the primary
component of
cell membranes... the new research focuses on brain synapses,
where
neurotransmitters such as dopamine, acetylcholine, serotonin
and
glutamate carry messages from presynaptic neurons to receptors
in the
membranes of postsynaptic neurons... the researchers detected
a large
increase in the levels of specific brain proteins known to be
concentrated within synapses, indicating that more synaptic
membranes
had formed... Synaptic membrane protein levels rose if the
gerbils
were.. fed all three compounds... Choline can be found in
meats, nuts
and eggs, and omega-3 fatty acids are found in a variety of
sources,
including fish, eggs, flaxseed and meat from grass-fed
animals.
Uridine, which is found in RNA and produced by the liver and
kidney, is
not obtained from the diet. However, uridine is found in human
breast
milk, which is a good indication that supplementary uridine is
safe for
humans to consume, Wurtman said...
http://www.sciencedaily.com/releases/2006/04/060427215901.htm
Nutrition and
Alzheimer's disease:
pre-clinical concepts.
Kamphuis PJ, Wurtman RJ.
Danone Research-Centre
for
Specialised Nutrition, Wageningen, The Netherlands.
patrick.kamphuis@danone.com
Abstract
Eur J Neurol. 2009 Sep;16
Suppl
1:12-8.
...An Alzheimer's brain
contains fewer synapses and reduced levels of synaptic
proteins and
membrane phosphatides. Brain membrane phosphatide synthesis
requires at
least three dietary precursors: polyunsaturated fatty acids,
uridine
monophosphate (UMP) and choline. Animal studies have shown
that
administration of these nutrients increases the level of
phosphatides,
specific pre- or post-synaptic proteins and the number of
dendritic
spines - a requirement for new synapse formation. These
effects are
markedly enhanced when animals receive all three compounds
together.
This multi-nutrient approach in animals has also been shown to
decrease
amyloid beta protein (Abeta) plaque burden, improve learning
and memory
through increased cholinergic neurotransmission and have a
neuroprotective effect in several mouse models of AD. Whether
these
potential therapeutic effects of a multi-nutrient approach
observed in
animal models can also be replicated in a clinical setting
warrants
further investigation.
PMID: 19703215 [PubMed -
indexed for
MEDLINE]
http://www.ncbi.nlm.nih.gov/pubmed/19703215
Use of phosphatide
precursors to promote
synaptogenesis.
Wurtman RJ, Cansev M,
Sakamoto
T, Ulus IH.
Department of Brain and
Cognitive Sciences, Massachusetts Institute of Technology,
Cambridge,
MA 02139, USA. dick@mit.edu
Annu Rev Nutr.
2009;29:59-87.
Abstract
New brain synapses form
when a
postsynaptic structure, the dendritic spine, interacts with a
presynaptic terminal. Brain synapses and dendritic spines,
membrane-rich structures, are depleted in Alzheimer's disease,
as are
some circulating compounds needed for synthesizing
phosphatides, the
major constituents of synaptic membranes. Animals given three
of these
compounds, all nutrients-uridine, the omega-3 polyunsaturated
fatty
acid docosahexaenoic acid, and choline-develop increased
levels of
brain phosphatides and of proteins that are concentrated
within
synaptic membranes (e.g., PSD-95, synapsin-1), improved
cognition, and
enhanced neurotransmitter release. The nutrients work by
increasing the
substrate-saturation of low-affinity enzymes that synthesize
the
phosphatides. Moreover, uridine and its nucleotide metabolites
activate
brain P2Y receptors, which control neuronal differentiation
and
synaptic protein synthesis. A preparation containing these
compounds is
being tested for treating Alzheimer's disease.
PMID: 19400698 [PubMed -
indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/pubmed/19400698
Synapse
formation
is enhanced by oral administration of uridine and DHA, the
circulating precursors of brain phosphatides.
Wurtman RJ, Cansev M, Ulus
IH.
Department of Brain and
Cognitive
Sciences, Massachusetts Institute of Technology, Cambridge, MA
02139,
USA.
J Nutr Health Aging.
2009
Mar;13(3):189-97.
Abstract
OBJECTIVE: The loss of
cortical
and hippocampal synapses is a universal hallmark of
Alzheimer's
disease, and probably underlies its effects on cognition.
Synapses are
formed from the interaction of neurites projecting from
"presynaptic"
neurons with dendritic spines projecting from "postsynaptic"
neurons.
Both of these structures are vulnerable to the toxic effects
of nearby
amyloid plaques, and their loss contributes to the decreased
number of
synapses that characterize the disease. A treatment that
increased the
formation of neurites and dendritic spines might reverse this
loss,
thereby increasing the number of synapses and slowing the
decline in
cognition. DESIGN SETTING, PARTICIPANTS, INTERVENTION,
MEASUREMENTS AND
RESULTS: We
observe that giving normal rodents uridine and the omega-3
fatty acid
docosahexaenoic acid (DHA) orally can enhance dendritic spine
levels
(3), and cognitive functions (32). Moreover this treatment
also
increases levels of biochemical markers for neurites (i.e.,
neurofilament-M and neurofilament-70) (2) in vivo, and uridine
alone
increases both these markers and the outgrowth of visible
neurites by
cultured PC-12 cells (9). A phase 2 clinical trial, performed
in
Europe, is described briefly.
DISCUSSION AND
CONCLUSION:
Uridine and DHA are circulating precursors for the
phosphatides in
synaptic membranes, and act in part by increasing the
substrate-saturation of enzymes that synthesize
phosphatidylcholine
from CTP (formed from the uridine, via UTP) and from
diacylglycerol
species that contain DHA: the enzymes have poor affinities for
these
substrates, and thus are unsaturated with them, and only
partially
active, under basal conditions. The enhancement by uridine of
neurite
outgrowth is also mediated in part by UTP serving as a ligand
for
neuronal P2Y receptors. Moreover administration of uridine
with DHA
activates many brain genes, among them the gene for the m-1
metabotropic glutamate receptor [Cansev, et al, submitted].
This
activation, in turn, increases brain levels of that gene's
protein
product and of such other synaptic proteins as PSD-95,
synapsin-1,
syntaxin-3 and F-actin, but not levels of non-synaptic brain
proteins
like beta-tubulin. Hence it is possible that giving uridine
plus DHA
triggers a neuronal program that, by accelerating phosphatide
and
synaptic protein synthesis, controls synaptogenesis. If
administering
this mix of phosphatide precursors also increases synaptic
elements in
brains of patients with Alzheimer 's disease, as it does in
normal
rodents, then this treatment may ameliorate some of the
manifestations
of the disease.
PMID: 19262950 [PubMed -
indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/pubmed/19262950
Synapse Formation and
Cognitive Brain
Development: effect of docosahexaenoic (DHA) and other
dietary
constituents
R. J. Wurtman,
Massachusetts
Institute of Technology, Department of Brain and Cognitive
Sciences,
Cambridge MA, 02139, USA;
Corresponding Author: R.
J.
Wurtman, Address: MIT, 43 Vassar St., 46-5023, Cambridge MA,
02139
Metabolism. Author
manuscript;
available in PMC 2009 October 1.
Published in final
edited form
as:
Metabolism. 2008
October;
57(Suppl 2): S6–10.
doi:
10.1016/j.metabol.2008.07.007.
PMCID: PMC2578826
NIHMSID: NIHMS71939
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2578826/
Dietary
uridine
enhances the improvement in learning and memory produced by
administering DHA to gerbils.
Holguin S, Martinez J, Chow
C,
Wurtman R.
Massachusetts Institute of
Technology, 43 Vassar St., 46-5023, Cambridge, MA 02139, USA.
FASEB J. 2008
Nov;22(11):3938-46. Epub 2008 Jul 7.
Abstract
This study examined the
effects
on cognitive behaviors of giving normal adult gerbils three
compounds,
normally in the circulation, which interact to increase brain
phosphatides, synaptic proteins, dendritic spines, and
neurotransmitter
release. Animals received supplemental uridine (as its
monophosphate,
UMP; 0.5%) and choline (0.1%) via the diet, and
docosahexaenoic acid
(DHA; 300 mg/kg/day) by gavage, for 4 wk, and then throughout
the
subsequent period of behavioral training and testing. As shown
previously, giving all three compounds caused highly
significant
(P<0.001) increases in total brain phospholipids and in
each major
phosphatide; giving DHA or UMP (plus choline) produced smaller
increases in some of the phosphatides. DHA plus choline
improved
performance on the four-arm radial maze, T-maze, and Y-maze
tests;
coadministering UMP further enhanced these increases. (Uridine
probably
acts by generating both CTP, which can be limiting in
phosphatide
synthesis, and UTP, which activates P2Y receptors coupled to
neurite
outgrowth and protein synthesis. All three compounds also act
by
enhancing the substrate-saturation of phosphatide-synthesizing
enzymes.) These findings demonstrate that a treatment that
increases
synaptic membrane content can enhance cognitive functions in
normal
animals.
PMID: 18606862 [PubMed -
indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/pubmed/18606862
Full text (free): http://www.fasebj.org/cgi/reprint/22/11/3938
Chronic
administration
of DHA and UMP improves the impaired memory of
environmentally impoverished rats.
Holguin S, Huang Y, Liu J,
Wurtman R.
Massachusetts Institute of
Technology, Department of Brain and Cognitive Sciences, 43
Vassar
Street, 46-5023, Cambridge, MA 02139, USA.
Behav Brain Res. 2008 Aug
5;191(1):11-6. Epub 2008 Mar 18.
Abstract
Living in an enriched
environment (EC) during development enhances memory function
in
adulthood; living in an impoverished environment (IC) impairs
memory
function. Compounds previously demonstrated to improve memory
among IC
rats include CDP-choline and uridine monophosphate (UMP).
Brain
phosphatidylcholine (PC) synthesis utilizes both the uridine
formed
from the metabolism of exogenous CDP-choline and UMP, and the
choline
formed from that of CDP-choline. It also uses the
polyunsaturated fatty
acid (PUFA) DHA, a precursor for the diacylglycerol
incorporated into
PC. DHA administration also improves cognition in young and
aged
rodents and humans; its effects on cognitively impaired IC
rats have
not been characterized. We have thus examined the consequences
of
administering DHA (300 mg/kg) by gavage, UMP (0.5% in the
diet), or
both compounds on hippocampal- and striatal-dependent forms of
memory
among rats exposed to EC or IC conditions for 1 month starting
at
weaning, and consuming a choline-containing diet. We observe
that
giving IC rats either dietary UMP or gavaged DHA improves
performance
on the hidden version of the Morris water maze (all
P<0.05), a
hippocampal-dependent task; co-administration of both
phosphatide
precursors further enhances the IC rats' performance on this
task
(P<0.001). Neither UMP nor DHA, nor giving both compounds,
affects
the performance of EC rats on the hidden version of the Morris
water
maze (P>0.05), nor the performance by IC or EC rats on the
visible
version of the Morris water maze (all P>0.05), a
striatal-dependent
task. We confirm that co-administration of UMP and DHA to rats
increases brain levels of the phosphatides PC, PE, SM, PS, PI,
and
total brain phospholipid levels (all P<0.05), and show that
rearing
animals in an enriched environment also elevates brain PC, PS,
and PI
levels (all P<0.01) and total brain phospholipids
(P<0.01)
compared with their levels in animals reared in an IC
environment.
These findings suggest that giving DHA plus UMP can ameliorate
memory
deficits associated with rearing under impoverished
conditions, and
that this effect may be mediated in part through enhanced
synthesis of
brain membrane phosphatides.
PMID: 18423905 [PubMed -
indexed for MEDLINE]PMCID: PMC2478743
http://www.ncbi.nlm.nih.gov/pubmed/18423905
Full text (free): http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2478743/?tool=pubmed
For the latest on this, do a search on PubMed http://www.ncbi.nlm.nih.gov/sites/entrez
with the search terms Wurtman
and uridine.
There was then some discussion about where one would get the
various
ingredients of the "cocktail". Fish oil for DHA.
Choline
can be had as a supplement. The uridine
was a problem.
Uridine as a supplement is difficult to find. You wouldn't
think
so since it is used in most infant formulas. Some people
assert
that anything with "orotate" in it will metabolize to uridine.
Magnesium (Mg) Orotate would then be a good source of uridine
and is
readily available in health food stores or online at places like
Amazon.com. Magnesium is advised widely for the AD brain.
Moreover Mg.
orotate can be used with DHA and choline.
A thread on the Alzheimer's Association message board called
"The
Ultimate Alzheimer's Cocktail" seems even more interesting:
http://alzheimers.infopop.cc/eve/forums/a/tpc/f/762104261/m/1891020913/p/1
Nutrient 'Cocktail'
Appears to Improve
Dementia Symptoms
FRIDAY, Jan. 8, 2010
(HealthDay
News) -- A combination of three nutrients
might help improve memory in Alzheimer's patients by
stimulating the
growth of new brain connections (synapses), a new study shows.
Uridine, choline and the
omega-3 fatty acid DHA (all found in breast
milk) are precursors to the fatty molecules that make up brain
cell
membranes, which form synapses... In a clinical trial, 225
Alzheimer's
patients were given a cocktail of the three nutrients, along
with B
vitamins, phosopholipids and antioxidants. Patients with mild
Alzheimer's showed improvements in verbal memory...
http://news.yahoo.com/s/hsn/20100108/hl_hsn/nutrientcocktailappearstoimprovedementiasymptoms
Could Drink, Souvenaid, Be A Cure For
Alzheimer's?
Study Will Determine
Whether
Nutrient-Laden Souvenaid Can Head Off
Memory Loss
CHICAGO (CBS) Jan 11,
2010 8:45
pm US/Eastern
... It looks like a
simple
juice box, but inside there's a mixture
called Souvenaid that could help Alzheimer's patients head off
memory
loss and possibly even improve their memory... "Souvenaid"
contains
vitamins and nutrients, including Uridine, fish oil components
and
Choline...
http://cbs4.com/health/Souvenaid.Alzheimers.drink.2.1419881.html
Here is a Yahoo
search
on one of the key ingredients 'uridine':
http://news.search.yahoo.com/news/search?ei=UTF-8&c=&p=uridine
Some people claim that
uridine
is converted to CDP choline. A supplement called Alpha GPC
may be
a superior acetylcholine precursor. If so, uridine may be
redundant if
you are already using Alpha GPC. However, uridine does appear to
help
with DNA synthesis which may warrant its use in addition to
Alpha GPC.
Here are some links about a product with uridine. This is
just
information, and in no way should be construed as an
endorsement.
http://www.lef.org/Vitamins-Supplements/Item00921/Cognitex-with-Neuroprotection-Complex.html
You can read about CDP-choline, and Alpha GPC too:
http://search.lef.org/cgi-src-bin/MsmGo.exe?grab_id=0&page_id=4005&query=GPC&hiword=GPC%20
http://search.lef.org/cgi-src-bin/MsmGo.exe?grab_id=0&page_id=5875&query=GPC&hiword=GPC%20
http://search.lef.org/cgi-src-bin/MsmGo.exe?grab_id=0&page_id=8012&query=GPC&hiword=GPC%20
http://www.lef.org/magazine/mag2002/sep2002_cover_gpc_02.html
http://search.lef.org/cgi-src-bin/MsmGo.exe?grab_id=0&page_id=4906&query=CDP&hiword=CDP%20
I think an MCT oil regimen should be
added to
this "cocktail" for
people struggling with neurodegenerative diseases.
Exercise:
How to cut your risk
of memory loss
By David S. Martin, CNN
updated 11:35 AM EST,
Wed November 9, 2011
...Growing the brain
Using new, more powerful
MRI scanners, researchers have shown how even moderate
exercise can actually increase the size of the hippocampus,
the part of the brain responsible for forming memories,
essentially turning back the clock and making the brain
younger.
"We have found this
treasure, this amazing phenomenon that the brain can grow,"
Fotuhi says.
After 50, the brain --
and the hippocampus -- typically begins losing volume. The
hippocampus loses 1% of its volume every two years and
accelerates up to 2% per year later in life. But this loss is
not set in stone.
Dr. Arthur Kramer at the
University of Illinois and his colleagues took 120 older
adults and put half of them into an exercise group, which
walked three days a week, and the other half on a stretching
regimen.
After a year, the group
that walked had better memory than at the start of the study.
More than that, MRI scans showed that hippocampal volume
increased, on average, by 2%, effectively making their brains
a year or two younger. The brains of the group that stretched
continued to age...
http://www.cnn.com/2011/11/09/health/keeping-brain-young-memory/index.html
Attention, Couch
Potatoes! Walking Boosts
Brain Connectivity, Function
ScienceDaily (Aug. 27,
2010) —
A group of "professional couch potatoes," as one researcher
described
them, has proven that even moderate exercise -- in this case walking at
one's own pace for 40 minutes three times a week --
can enhance
the
connectivity of important brain circuits, combat declines in
brain
function associated with aging and increase performance on
cognitive
tasks.
http://www.sciencedaily.com/releases/2010/08/100826141327.htm
Natural Compound And
Exercise Boost
Memory In Mice
ScienceDaily (May 30, 2007) — A natural compound found in
blueberries,
tea, grapes, and cocoa enhances memory in mice, according to
newly
published research. This effect increased further when mice
also exercised regularly...
The compound,
epicatechin, is one of
a group
of chemicals known as flavonols and has been shown previously
to
improve cardiovascular function in people and increase blood
flow in
the brain.
http://www.sciencedaily.com/releases/2007/05/070529174815.htm
Walk Much? It May Protect
Your Memory
Down the Road
ScienceDaily (Oct. 13, 2010) — New research suggests that
walking at
least six miles per week may protect brain size and in turn,
preserve
memory in old age, according to a study published in the
October 13,
2010, online issue of Neurology®, the medical journal of
the
American Academy of Neurology... The study found that people
who walked
at least 72 blocks per week, or roughly six to nine miles, had
greater
gray matter volume than people who didn't walk as much, when
measured
at the nine-year time point after their recorded activity.
Walking more
than 72 blocks did not appear to increase gray matter volume
any
further.
By four years later, 116 of the participants, or 40 percent,
had
developed cognitive impairment or dementia. The researchers
found that
those who walked the most cut their risk of developing memory
problems
in half...
http://www.sciencedaily.com/releases/2010/10/101013164703.htm
Walking Slows Progression of
Alzheimer's
ScienceDaily (Nov. 29, 2010) — Walking may slow cognitive
decline in
adults with mild cognitive impairment (MCI) and Alzheimer's
disease, as
well as in healthy adults, according to a study presented
November 29
at the annual meeting of the Radiological Society of North
America
(RSNA). "We found that walking five miles per week protects
the brain
structure over 10 years in people with Alzheimer's and MCI,
especially
in areas of the brain's key memory and learning centers," said
Cyrus
Raji, Ph.D., from the Department of Radiology at the
University of
Pittsburgh in Pennsylvania. "We also found that these people
had a
slower decline in memory loss over five years."... The
findings showed
across the board that greater amounts of physical activity
were
associated with greater brain volume. Cognitively impaired
people
needed to walk at least 58 city blocks, or approximately five
miles,
per week to maintain brain volume and slow cognitive decline.
The
healthy adults needed to walk at least 72 city blocks, or six
miles,
per week to maintain brain volume and significantly reduce
their risk
for cognitive decline...
http://www.sciencedaily.com/releases/2010/11/101129101914.htm
The question is, do people
not
walk because they are having problems of some sort that make it
difficult? In that case, not walking or not exercising is
a
symptom of the disease.
Neurogenesis:
See also Curcumin
Lithium
Prozac
Stem Cell
Aphanizomenon flos-aquae (AFA)
Brain-derived Neurotrophic Factor (BDNF)
GCSF (granulocyte-colony stimulating
factor)
Other news:
Promising Drug Candidate Reverses
Age-Related
Memory Loss in Mice
ScienceDaily (Oct. 13, 2010) —
Researchers at
the University of Edinburgh report a new experimental compound
that can
improve memory and cognitive function in aging mice. The
compound is
being investigated with a view to developing a drug that could
slow the
natural decline in memory associated with aging.
In a study published in the Journal of
Neuroscience, the team reports the effects of a new synthetic
compound
that selectively blocks 11beta-HSD1 on the ability of mice to
complete
a memory task, called the Y maze.
"Normal old mice often have marked
deficits in
learning and memory just like some elderly people. We found
that
life-long partial deficiency of 11beta-HSD1 prevented memory
decline
with aging. But we were very surprised to find that the
blocking
compound works quickly over a few days to improve memory in
old mice
suggesting it might be a good treatment for the already
elderly."
"These results provide proof-of-concept
that
this class of drugs could be useful to treat age-related
decline in
memory. We previously showed that carbenoxolone,
an
old
drug
that
blocks
multiple
enzymes
including 11beta-HSD1,
improves memory in healthy elderly men and in patients with
type 2
diabetes after just a month of treatment, so we are optimistic
that our
new compounds will be effective in humans. The next step is to
conduct
further studies with our preclinical candidate to prove that
the
compound is safe to take into clinical trials, hopefully
within a year."
http://www.sciencedaily.com/releases/2010/10/101012173222.htm
New Drug May Help Rescue The
Aging Brain
ScienceDaily (Mar. 31, 2008) — As
people age,
their brains pay the price — inflammation goes up, levels of
certain
neurotransmitters go down, and the result is a plethora of
ailments
ranging from memory impairment and depression to Alzheimer’s
and
Parkinson’s. But in a long-term study with implications to
treat these
and other conditions, researchers have found that an
experimental drug,
taken chronically, has the ability to stem the effects of
aging in the
rat brain.
The drug, temporarily designated
S18986,
interacts with AMPA (short
for α-
Amino-3-hydroxy-5- methylisoxazole-4- propionic acid, or
ampakine)
receptors in the brain. These receptors transmit excitatory
signals in
the brain, and researchers
were
interested in experimental AMPA-receptor drugs (such as
S18986) for
their neuroprotective abilities and for the way they
temporarily boost
memory. But rather than investigating the compound’s
short-term
effects, Alfred E. Mirsky Professor Bruce McEwen and his lab
members
made a far longer commitment: The scientists studied the
drug’s impacts
on middle-aged to elderly rats and found that, when
administered daily
over four consecutive months, it appeared to improve memory
and slow
brain aging... When compared to control animals that had
received only
sugar water, the drugged rats were not only more active and
better at
memory tests, but their brains showed physical signs of slowed
aging.
Neurons in the forebrain that produce acetylcholine, a
neurotransmitter
known to play a role in learning and memory, had 37 percent
less
decline. Dopamine-producing neurons, which are responsible for
sustaining activity and motivation levels, slowed their
decline by 43
percent. Levels of inflammation in the brain were also
significantly
lower. “Every marker we chose to look at seemed to indicate
there was
some preservation of function during aging with chronic
treatment,”
Hunter says. The drug appears to slow aging’s effects
throughout the
entire brain...
http://www.sciencedaily.com/releases/2008/03/080330183235.htm
Learn More Quickly by
Transcranial
Magnetic Brain Stimulation, Study in
Rats Suggests
ScienceDaily (Jan. 29, 2011)
..."In general, the activity of the cells drops as a result of
a
low-frequency stimulation, i.e. with one magnetic pulse per
second. At
higher frequencies from five to 50 pulses per second, the
activity of
the cells increases. This rhythm is based on the natural theta
rhythm
of four to seven Hertz which can be observed in an EEG,"...
http://www.sciencedaily.com/releases/2011/01/110128121629.htm
Let's hear it for multitasking! I
hate
that word when I see it in job descriptions. To me, what
it means
is that management can't make up its mind, so they have their
employees
jumping from task to task to task. Multitasking is the
consequence of bad management. You can't think two
thoughts at
the same time. Not even computers can work on more than
one task
at the same time unless they have multiple processors, but then,
each
one is only working on one task at a time. Clever
operating
systems fool you into thinking that a computer is doing many
tasks at
the same time, when in fact what they are doing is swapping
tasks in
and out so fast that it just looks like it. There is an
enormous
amount of computer dead time between human keystrokes on a
keyboard, so
they send the processor off to do a hundred or so other things
while it
waits for your finger. But this article says that
switching tasks
helps you focus. That may be, but I think it must be left
up to
your own "processor" to decide what "diversions" are most
appropriate,
otherwise, like a freight train, your thought get derailed and
it takes
great (inefficient) effort to get things back on track.
Brief Diversions Vastly
Improve
Focus, Researchers Find
ScienceDaily (Feb. 8, 2011) — A new study in the journal
Cognition
overturns a decades-old theory about the nature of attention
and
demonstrates that even brief diversions from a task can
dramatically
improve one's ability to focus on that task for prolonged
periods...
"We propose that deactivating and reactivating your goals
allows you to
stay focused," he said. "From a practical standpoint, our
research
suggests that, when faced with long tasks (such as studying
before a
final exam or doing your taxes), it is best to impose brief
breaks on
yourself. Brief mental breaks will actually help you stay
focused on
your task!"
http://www.sciencedaily.com/releases/2011/02/110208131529.htm
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Updated: October 14,
2010
Inception: January 23, 2010