A triple-blinded, randomized, placebo-controlled study on human subjects was conducted
on the effect of AFA extract
s on the number of circulating stem cells.
Consumables
Volunteers were fed
one gram of a blend of two AFA extracts (StemEnhance – SE),
and a placebo
(Ctrl).
Volunteers
A total of 15 healthy volunteers were selected using the following exclusion criteria:
•
Under 20 or over 65 years of age
•
Pregnancy
•
Severe asthma and allergies requiring daily medication
•
Any known chronic illness or previous/current venereal disease
•
Frequent recreational drug use
•
Impaired digestive function (including previous major gastrointestinal surgery).
Upon arrival, the volunteers were seated in quiet areas and instructed to remain quiescent,
comfortably sitting in a chair, for one hour. Immediately after drawing the baseline
sample, a consumable was provided. The volunteers were instructed to remain quiescent
for the whole duration of the experiment. Blood samples were later drawn 30, 60 and 120
minutes after ingestion of the consumable.
Assessment of circulating stem cells
At each time point, 5 ml blood was drawn into heparin, and 2 ml blood was drawn into
EDTA. One sample was used to perform a complete blood count (CBC) while the other
sample was prepared for immunostaining (CD34, CD45 and CD14) and flow cytometry.
Flowcytometry and data analyses were done blindly.
Data is expressed as mean ± SE.
Triple-Blind Randomized Placebo-Controlled Study of the Effect of
StemEnhance on Bone Marrow Stem Cell Mobilization
1
by Christian Drapeau, MSc.
Aim of the study
Methods
1
This is a summary of a full-length study report prepared for publication in the peer-review scientific literature.
2
Figure 1
. Time course of the number of CD34+ cells in
peripheral blood after consumption (arrow) of SE and
placebo (Crtl). Data are expressed as % of starting value.
Bars express standard error.
Consumption of SE led to an increase in
the number of circulating CD34+ cells,
while consumption of the placebo did not
lead to any statistically significant effect.
Since the overall time for the absorption
of bioactive compounds, delivery to
target organs, and the generation a
quantifiable physiological response may
be different depending on each
volunteer’s overall physiology, we
calculated the maximum response of SE
at any one point in time, within 60
minutes of consumption. We found a 24
± 5 % increase (median = 27%) in the
number of circulating stem cells with SE.
If
we include data obtained during a dose
study performed in May 2005, the average
maximum response raises to 30 ± 6%.
This study confirmed that SE is effective at supporting the release of stem cells from the
bone marrow, increasing the number of circulating stem cells (CD34+ cells). The data
collected show that SE increases the number of circulating stem cells by up to 30%.
Physiological relevance of the observed stem cell mobilization
In this study the average number of lymphocytes was 1,978 per ěL and the average
proportion of CD34+ cells at time 0 was 0.12%, for an average number of circulating
CD34+ cells of 2.4 per ěL. An increase of 25% to 30%, as seen in this study, translates
to an average increase of 0.7 stem cells per ěL, i.e. from 2.4 to 3.1 stem cells per ěL.
Assuming 5.0 liters of blood, this corresponds to approximately 3.5 million new
circulating stem cells. The novelty of the concept of using endogenous release of bone
marrow stem cells to support optimal health is paralleled by a scarcity of data linking the
magnitude of mobilization with physiological relevance. Nevertheless, data exist to
estimate the physiological relevance of putting into circulation 3.5 million new stem
cells. Based on various studies (Orlic et al. 2001; Bodine et al., 1994; Bodine et al. 1993;
Vandelverde et al., 2005; Valgimigli et al., 2005) one can estimate that one gram of
StemEnhance can lead to potentially of up to a few billion somatic cells in target tissues.
Therefore the average increase of 25% to 30% obtained with SE in this study is likely to
have physiological relevance.
90%
100%
110%
120%
130%
0 30 60 90 120
SE
Ctrl
% of Start
Time (min)
p<0.003
121%
Results
Discussion
3
Bodine DM, Seidel NE, Gale MS, Nienhuis AW, and. (1994) Efficient Retrovirus Transduction of Mouse
Pluripotent Hematopoietic Stem Cells Mobilized Into the Peripheral Blood by Treatment With
Granulocyte Colony-Stimulating Factor and Stem Cell Factor.
Blood, 84(5): 1482-1491.
Bodine DM, Seidel NE, Zsebo KM, and Orlic D. (1993) In Vivo Administration of Stem Cell Factor to
Mice Increases the Absolute Number of Pluripotent Hematopoietic Stem Cells.
Blood, 82(2): 445-
455.
Orlic D, Kajstura J, Chimenti S, Bodine DM, Leri A. & Anversa P. (2003) Bone marrow stem cells
regenerate infarcted myocardium.
Pediatr Transplantation 7 (Suppl. 3): 86–88.
Orlic D, Kajstura J, Chimenti S, Limana F, Jakoniuk I, Quaini F, Nadal-Ginard B, Bodine DM, Leri A. &
Anversa P. (2001) Mobilized bone marrow cells repair the infracted heart, improving function and
survival. PNAS 98(18):10344–10349.
Valgimigli M, Rigolin GM, Cittanti C, Malagutti P, Curello S, Percoco G, Bugli AM, Porta MD, Bragotti
LZ, Ansani L, Mauro E, Lanfranchi A, Giganti M, Feggi L, Castoldi G, Ferrari R. (2005) Use of
granulocyte-colony stimulating factor during acute myocardial infarction to enhance bone marrow
stem cell mobilization in humans: clinical and angiographic safety profile. Eur Heart J. Apr 28.
Epub.
Vandervelde S, van Luyn MJ, Tio RA, Harmsen MC. (2005) Signaling factors in stem cell-mediated repair
of infarcted myocardium.
J Mol Cell Cardiol. Jun 28. Epub.
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