Science in Society Archive

Letter to José Maurício Bustani

15 August 2005,
His Excellency,
José Maurício Bustani,
Brazilian Embassy,
32 Green Street,

Dear Sir,

I am writing on behalf of the Independent Science Panel (ISP) to urge the Brazilian government to stop growing GM soya and indeed, any other GM crop, in Brazil. The soya in Brazil is intended for the European, Chinese and other markets, mainly as animal feed. But there is stiff consumer opposition in Europe and growing rejection around the world on account of serious concerns over the safety of GM food and feed.

The ISP, launched 10 May 2003 at a public conference in London, UK, consists of dozens of prominent scientists from 11 countries spanning the disciplines of agroecology, agronomy, biomathematics, botany, chemical medicine, ecology, epidemiology, histopathology, microbial ecology, molecular genetics, nutritional biochemistry, physiology, toxicology and virology ( ).

As their contribution to the global GM debate, the ISP reviewed the evidence on the hazards and problems of GM crops as well as the proven successes of sustainable agriculture, and published its report in June 2003 [1].

The key findings of the ISP report on GM crops are as follows:

Since its publication, all the major findings of the ISP report have been further corroborated; and the inadequacies of the US regulatory system identified by two US scientists [2].

New evidence confirms that most, if not all GM varieties may be unstable. French government scientists examined five GM varieties already commercialised, and found all the GM inserts had rearranged themselves. Belgian government scientists confirmed those results, and found some of the GM varieties were also non-uniform [3-5].

A paper published in 2002 [6] reported that 22 out of 33 transgenic proteins have runs of 6 or 7 amino acids identical to known allergens. These include all the Bt toxins (Cry proteins), the CP4 EPSPS and GOX conferring glyphosate tolerance, the coat protein of the papaya ringspot virus, and even marker proteins such as GUS ( b -glucuronidase). A follow-up study confirmed those results [7], highlighting the inadequacy of current methods to predict the allergenic potential of proteins new to our food chain and the need to take these positive findings seriously until they can be ruled out by further tests to be “false positives” [8]. This warning is particularly significant as a string of anecdotal evidence – including feeding trials presented by companies to regulatory authorities under “confidential business information” – continue to raise serious doubts over the safety of GM crops and GM food and feed [9].

More reports from the scientific literature indicate that the natural toxin is not the same as, or “substantially equivalent” to, the GM toxin. Green lacewings suffer significantly reduced survival and delayed development when fed an insect pest (lepidopteran) that has eaten GM maize containing the Bt toxin Cry1Ab, but not when fed the same pest treated with much higher levels of the natural toxin in bacteria [10,11]. These findings again suggest that the genetic modification process itself may be unsafe.

Recent findings indicate that glyphosate is toxic to human placental cells and Roundup Ready considerably worse [12, 13]. Roundup was found to be extremely lethal to frogs [14, 15].

A report drawing on 9 years of US Dept of Agriculture data concludes that overall, GM crops have increased pesticide use by 122 million pounds weight since 1996 [16].

These uncertainties over the safety of GMO are widely publicised amid mounting opposition to GM food and feed from farmers and consumers around the world.

Many also share the ISP scientists' concern about the accelerating destruction of the Amazon rainforest to make way for soya cultivation, as the integrity of the Amazon rainforests is widely acknowledged to be crucial for stabilizing global climate and rainfall patterns, and hence mitigating global warming [17, 18].

In view of the evidence against GM crops and in favour of all forms of sustainable non-GM agriculture, the ISP has called for a global ban on further environmental releases of GM crops and a comprehensive shift to non-GM sustainable agriculture. This is all the more urgent as water and oil - on which industrial monoculture, and even more so, GM agriculture are heavily dependent - are both rapidly depleting.

We urge you to convey a strong message to President Lula to reverse the decision to allow cultivation of GM soya. Instead every effort should be made to support reforestation of existing soya plantations for sustainable, small-scale agro-forestry that can truly provide food security for all [19].

Yours sincerely,

Dr. Mae-Wan Ho,
Member of ISP,
Director, Institute of Science in Society,
PO Box 32097,
NW1 0XR,

Article first published 18/08/05


  1. Ho MW, Lim LC et al. The Case for a GM-Free Sustainable World , ISP Report, ISIS & TWN, London & Penang, 2003.
  2. Freese W and Schubert D. Safety testing and regulation of genetically engineered foods. Biotechnology and Genetic Engineering Reviews 2004, 21, 299-324.
  3. Collonier C, Berthier G, Boyer F, Duplan M-N, Fernandez S, Kebdani N, Kobilinsky A, Romanuk M, Bertheau Y. Characterization of commercial GMO inserts: a source of useful material to study genome fluidity. Poster presented at ICPMB: International Congress for Plant Molecular Biology (n°VII), Barcelona, 23-28th June 2003. Poster courtesy of Pr. Gilles-Eric Seralini, Président du Conseil Scientifique du CRII-GEN,
  4. The Service of Biosafety and Biotechnology (SBB) of the Scientific Institute of Public Health (IPH) in Brussels website (
  5. Ho MW. Unstable transgenic lines illegal. ISIS press release 03/12/03 ; also Science in Society 2004, 21, 23
  6. Kleter GA and Peijnenburg Ad ACM. Screening of transgenic proteins expressed in transgenic food crops for the presence of short amino acid sequences identical to potential, IgE-binding linear epitopes of allergens. BMC Structural Biology 2002, 2:8
  7. Fiers MWEJ, Kleter GA, Nijland H, Peijnenburg Ad ACM, Nap JP and van Ham R CHJ. Allermatch TM, a webtool for the prediction of potential allergenicity according to current FAO/WHO Codex alimentarius guidelines. BMC Bioinformatics 2004, 5:133
  8. Ho MW, Pusztai A, Bardocz S and Cummins J. Are transgenic proteins allergenic? ISIS report (to appear).
  9. Ho MW and Cummins J. GM food & feed not fit for “man or beast”. ISP Briefing, UK Parliament, 29 April 2004; ISIS Press release 07/05/04
  10. Dutton A, Klein H, Romeis J and Bigler F. “Uptake of Bt-toxin by herbivores feeding on transgenic maize and consequences for the predator Chrysoperia carnea ”, Ecological Entomology 2002, 27, 441-7.
  11. Romeis J, Dutton A and Bigler F. “ Bacillus thuringiensis toxin (Cry1Ab) has no direct effect on larvae of the green lacewing Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae)”, Journal of Insect Physiology 2004, in press.
  12. Richard S, Moslemi S, Sipahutar H, Benachour N and Seralini G-E. Differential effects of glyphosate and Roundup on human placental cells and aromatases
  13. Ho MW and Cummins J. Glyphosate toxic and Roundup worse. Science in Society 2005, 26, 12,
  14. Relyea RA. The impact of insecticides and herbicides on the biodiversity and productivity of aquatic communities. Ecological Applications 2005, 15, 618-27.
  15. Ho MW. Roundup kills frogs. Science in Society 2005, 26, 13,
  16. Benbrook CM. Genetically engineered crops and pesticide use in the United States: The first nine years. Northwest Science and Technology Centre, Sandpoint, Idaho. 25 Oct 2004. http:/
  17. Bunyard P. Why Gaia needs rainforests. Science in Society 2003, 20, 24-26,
  18. Bunyard P. Soya destroying Amazon. Science in Society 2003, 20, 27,
  19. Ho MW. Sustainable food systems for sustainable development. Science in Society 2005, 27, 33-35,

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