Sayer Ji

Activist Post

A new study, yet to receive any media attention, reveals the “leukemogenic” properties of the Bt toxin biopesticides engineered into the vast majority of GMO food crops already within the US food supply.

Last September, the causal link between cancer and genetically modified food was confirmed in a French study, the first independent long-term animal feeding study of its kind. The disturbing details can be found here: New Study Finds GM Corn and Roundup Causes Cancer In Rats

Now, a new study published in the Journal of Hematology & Thromboembolic Diseases indicates that the biopesticides engineered into GM crops known as Bacillus Thuringensis (Bt) or Cry-toxins, may also contribute to blood abnormalities from anemia to hematological malignancies (blood cancers) such as leukemia.[i]

A group of scientists from the Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia/DF, Brazil set out to test the purported human and environmental biosafety of GM crops, looking particularly at the role that the Bt toxin found within virtually all GM food crops plays on non-target or non-insect animal species.

The research was spurned by the Brazilian Collegiate Board of Directors of the National Sanitary Surveillance Agency (ANVISA), who advocated in 2005 for evaluations of toxicity and pathogenicity of microbiological control agents such as Bt, given that little is known about their toxicological potential in non-target organisms, including humans.

While Bacillus Thurigensis spore-crystals have been used since the late 1960’s in agriculture as a foliar insecticide, it was only after the advent of recombinant DNA biotechnology that these toxin-producing genes (known as delta endotoxins) were first inserted into the plants themselves and released into commercial production in the mid-90’s, making their presence in the US food supply and the bodies of exposed populations ubiquitous.

What the new study revealed is that various binary combinations and doses of Bt toxins target mammalian cells, particularly the erythroid (red blood cell) lineage, resulting in white and red blood cell changes indicative of significant damage. Some of these adverse changes included anemia,and suppression of bone marrow proliferation and abnormal lymphocyte changes consistent with some types of leukemia.

The researchers also found that one of the prevailing myths about the selective toxicity of Bt to insects, the target species, no longer holds true:

It has been reported that Cry toxins exert their toxicity when activated at alkaline pH of the digestive tract of susceptible larvae, and, because the physiology of the mammalian digestive system does not allow their activation, and no known specific receptors in mammalian intestinal cells have been reported, the toxicity these MCAs to mammals would negligible [8,22,23]. However, our study demonstrated that Bt spore-crystals genetically modified to express individually Cry1Aa, Cry1Ab, Cry1Ac or Cry2A induced hematotoxicity, particularly to the erythroid lineage. This finding corroborates literature that demonstrated that alkali-solubilized Bt spore-crystals caused in vitro hemolysis in cell lines of rat, mouse, sheep, horse, and human erythrocytes and suggested that the plasma membrane of susceptible cells (erythrocytes, in this case) may be the primary target for these toxins [33]

This article first appeared at GreenMedInfo. Please visit to access their vast database of articles and the latest information in natural health.