Effects of the Blue-Green Algae Aphanizomenon flos-aquae (L.) Ralphs on Human Natural Killer Cells

Author(s): Raffi Manoukin, Monica Citton, Patricia Huerta, Barbara Rhode, Christian Drapeau, Gitte S. Jensen

ABSTRACT

In a double-blinded cross-over study, we evaluated the immediate (two hours) effect of Aphanizomenon flos-aqua (L.) Ralphs (AFA) on five normal healthy volunteers by comparing % NK cells in peripheral blood. The same volunteers consumed AFA and placebo on different days, and experiments were always done in the morning. The AFA dose was 1.5 g of freeze-dried algae. We found no differences in % NK cells after ingestion of placebo. In the same individuals, AFA ingestion resulted in a significant decrease if % NK cell in the circulation within two hours after AFA ingestion. The decreased level of NK cells was on average 63% of the starting percentage of circulating NK cells. In two donors, the expression of adhesion molecules of NK cells was tested after NK ingestion. The circulating NK cells showed increased expression of the adhesion receptor CD11b and the homing molecule L-selectin after AFA ingestion. We interpret this as a biological effect from yet uncharacterized molecular components within the AFA algae that regulates the recruitment of NK cells from blood into tissue. The observations may support previous speculations on the presence of neuropeptides or cytokine-like molecules within AFA. The rapid effect could indicate a direct action on NK cells, leading to increased ability to adhere to endothelium and migrate into lymphoid tissue. Absorbed components within ingested AFA could rapidly affect the endothelium in the gut mucosal-associated lymphoid tissue, leading to increased recruitment of specific cell subsets from blood. Alternatively, the action could occur via nerve stimulus to lymphoid tissue, thereby changing the tissue microenvironment, altering the endothelium or leading to secretion of chemokines. Both mechanisms would ultimately lead to an increased recruitment of NK cells from the blood, which after two hours leads to a measurable decrease of % NK cells in the circulation. Further studies are in progress to elucidate the short term and long term effects of AFA consumption on the human immune systems.

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TESTIMONIES

"In 1990 when my brother Randy Hood came up with the idea of feeding Bluegreen algae to animals, I responded to his enthusiasm with a ´wait and see´ attitude. Today I´ve shifted from a skeptic to a full supporter of algae for animals. After seeing Kea, Randy´s Bichon Frise, change from a hyperactive dog to a calm and energetic delight, I began to appreciate the brilliance of his vision. Then, my sister Robyn experimented with the Bluegreen Body the year she had health problems in her Icelandic horse herd. Now, I feed all my animals Bluegreen Body algae. After hearing the remarkable stories of hundreds of TTEAM members about the changes in their dogs, cats and horses from New Earth algae products, I believe every animal owner would benefit by giving the algae a try for themselves and their four-legged friends."
- Linda Tellington-Jones
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