Friday, March 4, 2011

GM Foods and Cross Species Gene Transfer

Scientists Discover New Route for GM-gene 'Escape'
Click above for full, in depth article...I have included only a fraction below...

"Genetically modified genes can jump species via wounds, yes horizontal gene transfer happens, and at high frequencies; it is the greatest, most underestimated hazard from GMOs released into the environment Dr. Mae-Wan Ho
Please circulate widely and forward to your elected representatives

Gene “escape” a misnomer for horizontal gene transfer

Scientists at Bristol University in the UK announced the discovery of [1] “a previously unknown route” whereby “GM genes may escape into the natural environment.”. . .
...The “escape” referred to is horizontal gene transfer – the spread of GM genes by infection and multiplication (literally like a virus) regardless of species barriers; hence the rate of spread is much more rapid, and the extent virtually unlimited.  New combinations of genetic material are created at unprecedented speed; affecting species the most that reproduce the fastest, i.e., bacteria and viruses that cause diseases.

Plant wounds hotspots for gene trafficking

 A. tumefaciens is probably unique among natural plant pathogens in carrying out trans-Kingdom horizontal gene transfer during an infection, and it is this ability that has been widely exploited for creating GM crops
...
In the 1990s, it was shown that the range of organisms transformed by Agrobacterium could be extended if the wound hormone acetosyringone was used to induce the virulence system.

Experiments confirmed their suspicion in full

They carried out their investigation using the wilt-causing fungus Verticillium albo-atrum, a strong candidate for encounters with Agrobacterium in the plant ...

Successful transformants of V. albo-atrum were obtained from every kind of plant tissue. 2 out of 17 potato slices, 1 out of 15 carrot slices; 14 out of 42 dishes each with 3-5 leaf pieces, and 10 out of 31 stem sections (without agar plate, so as to be as close to the natural condition as possible). These transformants were confirmed with molecular genetic analyses.


The risks are far greater than admitted

“Agrobacterium not only transfers genes into plant cells; there is possibility for retrotransfer of DNA from the plant cell to Agrobacterium [13]. H... There, Agrobacterium could multiply and transfer transgenic DNA to other bacteria, as well as to the next crop to be planted....
“Finally, Agrobacterium attaches to and genetically transforms several human cell lines [15, 16] (Common plant vector injects genes into human cells ISIS News 11/12)....This suggests that Agrobacterium transforms human cells by a mechanism similar to that which it uses for transforming plants cells.

Agrobacterium transfers genes into human cells

It is also worth reiterating our comment on the scientific paper [15] documenting that Agrobacterium can transfer genes into human cells [16].
“The paper shows that human cancer cells along with neurons and kidney cells were transformed with the Agrobacterium T-DNA...

“It is clear that little has been done to prevent environmental escape of the transforming bacteria or to quantify such releases. In conclusion, a study of cancer incidence among those exposed to Agrobacterium tumefaciens in the laboratory and in the field is needed. It would be worthwhile to screen workers for T-DNA sequences.” 

To conclude

The discovery by the Bristol University researchers barely scratches the surface of the hidden hazards of GMOs from horizontal gene transfer. It is high time for a global ban to be imposed on further environmental releases of GMOs, and all those responsible for releasing them should be brought to book.

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