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Re: [SANET-MG] food irradiation improves gm rice



Hi John,
I agree with you. However, the researchers did agree  that  synthetic
cry1Ab  produces a  toxic product ( the actual safety tests of Cry1Ab in
US were never done on the product of the synthetic gene but they used
the product from  bacterial surrogate that was different from  the
product of the synthetic gene). What the researcher showed was that
heavy food irradiation  can disguise the  food made from GM rice. It is
clear, anyhow, that food irradiation produces a range of toxic products
the adducts of DNA,protein and lipid. Synthetic Cry1Ab  may create a
blast of toxic protein adducts and that should be measured. Combining
synthetic genes and food irradiation is probably  a dangerous form of
harikari. sincerely,joe

John D'hondt wrote:

But they have not actually looked at the safety of this irradiated
transgenic rice? They have not fed it to rats and counted the casualties?
How in hell can they say then that the quality of a toxic food might be
improved?

john



Title: Effect of gamma irradiation on nutritional components and Cry1Ab
protein in the transgenic rice with a synthetic cry1Ab gene from
Bacillus thuringiensis
Author(s): D. Wu1; Q. Ye ; Z. Wang ; Y. Xia
Source: Radiation Physics and Chemistry      Volume: 69 Number: 1 Page:
79 -- 83
DOI: 10.1016/S0969-806X(03)00346-3

Abstract:
The effects of gamma irradiation on the transgenic rice containing a
synthetic cry1Ab gene from Bacillus thuringiensis were investigated.
There was almost no difference in the content of the major nutritional
components, i.e. crude protein, crude lipid, eight essential amino acids
and total ash between the irradiated grains and the non-irradiated
transgenic rice. However, the amounts of Cry1Ab protein and apparent
amylose in the irradiated transgenic rice were reduced significantly by
the doses higher than 200Gy. In vivo observation showed that Cry1Ab
protein contents also decreased in the fresh leaf tissues of survival
seedlings after irradiation with 200Gy or higher doses and showed
inhibition of seedling growth. The results indicate that gamma
irradiation might improve the quality of transgenic rice due to removal
of the toxic Cry1Ab protein.

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