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Committee on Identifying and Assessing Unintended Effects
of Genetically Engineered Foods on Human Health
Board on Life Sciences
Food and Nutrition Board
Board on Agriculture and Natural Resources
THE NATIONAL ACADEMIES PRESS
Washington, D.C.
www.nap.edu
SAFETY OF
GENETICALLY
ENGINEERED
FOODS
APPROACHES TO ASSESSING
UNINTENDED HEALTH EFFECTS
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
THE NATIONAL ACADEMIES PRESS • 500 Fifth Street, N.W. • Washington, D.C. 20001
NOTICE: The project that is the subject of this report was approved by the Governing
Board of the National Research Council, whose members are drawn from the councils of
the National Academy of Sciences, the National Academy of Engineering, and the Insti-
tute of Medicine. The members of the committee responsible for the report were chosen
for their special competences and with regard for appropriate balance.
Support for this project was provided by the U.S. Department of Health and Human
Services Food and Drug Administration under contract number 223-93-1025, the U.S.
Department of Agriculture under contract number 59-0790-1-183, and the U.S. Environ-
mental Protection Agency under contract number X-82956001. The views presented in
this report are those of the Committee on Identifying and Assessing Unintended Effects of
Genetically Engineered Foods on Human Health and are not necessarily those of the fund-
ing agencies.
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International Standard Book Number 0-309-53194-2 (PDF)
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Copyright 2004 by the National Academy of Sciences. All rights reserved.
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Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
The National Academy of Sciences is a private, nonprofit, self-perpetuating society of
distinguished scholars engaged in scientific and engineering research, dedicated to the
furtherance of science and technology and to their use for the general welfare. Upon the
authority of the charter granted to it by the Congress in 1863, the Academy has a mandate
that requires it to advise the federal government on scientific and technical matters.
Dr. Bruce M. Alberts is president of the National Academy of Sciences.
The National Academy of Engineering was established in 1964, under the charter of the
National Academy of Sciences, as a parallel organization of outstanding engineers. It is
autonomous in its administration and in the selection of its members, sharing with the
National Academy of Sciences the responsibility for advising the federal government. The
National Academy of Engineering also sponsors engineering programs aimed at meet-
ing national needs, encourages education and research, and recognizes the superior
achievements of engineers. Dr. Wm. A. Wulf is president of the National Academy of
Engineering.
The Institute of Medicine was established in 1970 by the National Academy of Sciences
to secure the services of eminent members of appropriate professions in the examination
of policy matters pertaining to the health of the public. The Institute acts under the respon-
sibility given to the National Academy of Sciences by its congressional charter to be an
adviser to the federal government and, upon its own initiative, to identify issues of medical
care, research, and education. Dr. Harvey V. Fineberg is president of the Institute of
Medicine.
The National Research Council was organized by the National Academy of Sciences in
1916 to associate the broad community of science and technology with the Academy’s
purposes of furthering knowledge and advising the federal government. Functioning in
accordance with general policies determined by the Academy, the Council has become the
principal operating agency of both the National Academy of Sciences and the National
Academy of Engineering in providing services to the government, the public, and the
scientific and engineering communities. The Council is administered jointly by both
Academies and the Institute of Medicine. Dr. Bruce M. Alberts and Dr. Wm. A. Wulf are
chair and vice chair, respectively, of the National Research Council.
www.national-academies.org
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
iv
COMMITTEE ON IDENTIFYING AND ASSESSING
UNINTENDED EFFECTS OF GENETICALLY ENGINEERED FOODS
ON HUMAN HEALTH
BETTIE SUE MASTERS (chair), Department of Biochemistry, University of
Texas Health Science Center, San Antonio
FULLER W. BAZER, Department of Animal Sciences, Texas A&M
University, College Station
SHIRLEY A. A. BERESFORD, Department of Epidemiology, University of
Washington, Seattle
DEAN DELLAPENNA, Department of Biochemistry and Molecular Biology,
Michigan State University, East Lansing
TERRY D. ETHERTON, Department of Dairy and Animal Science, The
Pennsylvania State University, University Park
CUTBERTO GARZA, Division of Nutritional Sciences, Cornell University,
Ithaca, New York
LYNN GOLDMAN, Johns Hopkins Bloomberg School of Public Health,
Baltimore, Maryland
SIDNEY GREEN, Department of Pharmacology, Howard University College
of Medicine, Washington, DC (until April, 2003)
JESSE F. GREGORY, III, Department of Food Science and Human
Nutrition, University of Florida, Gainesville
JENNIFER HILLARD, Past Vice President (Policy & Issues), Consumer’s
Association of Canada, Winnipeg, Manitoba
ALAN G. MCHUGHEN, Department of Botany and Plant Sciences,
University of California, Riverside
SANFORD A. MILLER, Center for Food and Nutrition Policy, Virginia
Polytechnic and State University, Alexandria
STEVE L. TAYLOR, Department of Food Science and Technology,
University of Nebraska, Lincoln
TIMOTHY ZACHAREWSKI, Department of Biochemistry and Molecular
Biology, Michigan State University, East Lansing
Staff
ANN YAKTINE, Senior Program Officer
MICHAEL KISIELEWSKI, Research Assistant
SYBIL BOGGIS, Senior Project Assistant
ANGELA ARMENDARIZ, Intern (June to August 2003)
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
v
COMMITTEE ON AGRICULTURAL BIOTECHNOLOGY, HEALTH,
AND THE ENVIRONMENT
BARBARA A. SCHAAL (chair), Washington University, St. Louis
DAVID A. ANDOW, University of Minnesota
NEAL L. FIRST, University of Wisconsin, Madison
LYNN J. FREWER, University of Wageningen
HENRY L. GHOLZ, National Science Foundation, Arlington, Virginia
EDWARD GROTH, III, Groth Consulting Services, Yonkers, New York
ERIC M. HALLERMAN, Virginia Polytechnic and State University
RICHARD R. HARWOOD, Michigan State University
CALESTOUS JUMA, Harvard University
SAMUEL B. LEHRER, Tulane University
SANFORD A. MILLER, Center for Food and Nutrition Policy, Virginia
Polytechnic and State University, Alexandria
PHILIP G. PARDEY, University of Minnesota
ELLEN K. SILBERGELD, University of Maryland Medical School
ROBERT E. SMITH, R.E. Smith Consulting, Inc.
ALLISON A. SNOW, The Ohio State University
PAUL B. THOMPSON, Michigan State University
DIANA H. WALL, Colorado State University
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
vi
BOARD ON LIFE SCIENCES
COREY S. GOODMAN (chair), Renovis, Inc., South San Francisco,
California
R. ALTA CHARO, University of Wisconsin, Madison
JOANNE CHORY, The Salk Institute for Biological Studies, La Jolla,
California
ELAINE FUCHS, The University of Chicago
DAVID J. GALAS, Keck Graduate Institute of Applied Life Sciences,
Claremont, California
BARBARA GASTEL, Texas A&M University
JAMES M. GENTILE, Hope College, Holland, Michigan
LINDA GREER, Natural Resources Defense Council, New York, New York
ED HARLOW, Harvard Medical School, Boston, Massachusetts
GREGORY A. PETSKO, Brandeis University, Waltham, Massachusetts
STUART L. PIMM, Columbia University, New York, New York
JOAN B. ROSE, Michigan State University
GERALD M. RUBIN, Howard Hughes Medical Institute, Chevy Chase,
Maryland
BARBARA A. SCHAAL, Washington University, St. Louis
RAYMOND L. WHITE, DNA Sciences, Inc., Fremont, California
Staff
FRANCES SHARPLES, Director
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
vii
FOOD AND NUTRITION BOARD
CATHERINE E. WOTEKI (chair), Iowa State University, Ames
ROBERT M. RUSSELL (vice chair), Tufts University, Boston, Massachusetts
LARRY R. BEUCHAT, University of Georgia, Griffin
SUSAN FERENC, SAF Risk, LC, Madison, Wisconsin
NANCY F. KREBS, University of Colorado Health Sciences Center, Denver
SHIRIKI KUMANYIKA, University of Pennsylvania School of Medicine,
Philadelphia
REYNALDO MARTORELL, Emory University, Atlanta, Georgia
LYNN PARKER, Food Research and Action Center, Washington, DC
NICHOLAS J. SCHORK, University of California, San Diego
JOHN W. SUTTIE, University of Wisconsin, Madison
STEVE L. TAYLOR, University of Nebraska, Lincoln
BARRY L. ZOUMAS, Pennsylvania State University, University Park
Staff
LINDA D. MEYERS, Director
GAIL SPEARS, Staff Editor
GERALDINE KENNEDO, Administrative Assistant
ELISABETH RIMAUD, Financial Associate
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
BOARD ON AGRICULTURE AND NATURAL RESOURCES
MAY BERENBAUM, (chair), University of Illinois, Urbana-Champaign
SANDRA BARTHOLMEY, Univesity of Illinois, Chicago
DEBORAH BLUM, University of Wisconsin, Madison
H. H. CHENG, University of Minnesota, St. Paul
BARBARA P. GLENN, Biotechnology Industry Organization, Washington, DC
LINDA F. GOLODNER, National Consumers League, Washington, DC
W. R. (REG) GOMES, University of California, Oakland
PERRY R. HAGENSTEIN, Institute for Forest Analysis, Planning, and
Policy, Wayland, Massachusetts
JANET C. KING, Children’s Hospital Oakland Research Center, California
DANIEL P. LOUCKS, Cornell University, Ithaca, New York
WHITNEY MACMILLAN, Cargill, Inc., Minneapolis, Minnesota
TERRY L. MEDLEY, DuPont Agriculture and Nutrition, Wilmington,
Delaware
OLE NIELSEN, Ontario Veterinary College, Canada
ALICE N. PELL, Cornell University, Ithaca, New York
BOBBY PHILLS, Florida A&M University, Tallahassee
SHARRON S. QUISENBERRY, Virgnia Polytechnic Institute and State
University
SONYA B. SALAMON, University of Illinois, Urbana-Champaign
G. EDWARD SCHUH, Humphrey Institute of Public Affairs, Minneapolis,
Minnesota
BRIAN J. STASKAWICZ, University of California, Berkeley
JACK WARD THOMAS, University of Montana, Missoula
JAMES H. TUMLINSON, Pennsylvania State University, University Park
B. L. TURNER, Clark University, Worcester, Massachusetts
Staff
CHARLOTTE KIRK BAER, Director
KAREN L. IMHOF, Administrative Assistant
DONNA LEE JAMEISON, Administrative Assistant (through October 2003)
viii
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
ix
Preface
Genetically modified foods and food products derived from genetically engi-
neered organisms are among a number of biotechnological developments intended
to improve shelf life, nutritional content, flavor, color, and texture, as well as
agronomic and processing characteristics. Although in popular parlance the term
genetically modified often is used interchangeably with genetically engineered,
in this report genetic modification refers to a range of methods used to alter the
genetic composition of a plant or animal, including traditional hybridization and
breeding. Genetic engineering is one type of genetic modification that involves
the intention to introduce a targeted change in a plant, animal or microbial gene
sequence to effect a specific result.
While there are a variety of methods for identifying and measuring specific
changes that result from genetic engineering, as well as from conventional breed-
ing techniques, such changes are not always easily discernible—particularly when
they are unexpected outcomes of the process or when they result from latent
expression of the genetic change or accumulated changes in functional effects in
the modified organism.
The addition of genetic engineering to the repertoire of methods to geneti-
cally modify organisms has increased the number and type of substances that can
be intentionally introduced into the food supply, as well as the magnitude of these
changes. While these intended changes can be readily evaluated for their safety in
food, unintentionally introduced changes in the composition of foods may be
more difficult to identify and assess. Whether genetic engineering per se affects
the likelihood of unintentionally introducing undesired compositional changes in
food is not fully understood. In contrast to adverse health effects that have been
associated with some traditional food production methods, similar serious health
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
x PREFACE
effects have not been identified as a result of genetic engineering techniques used
in food production. This may be because developers of bioengineered organisms
perform extensive compositional analyses to determine that each phenotype is
desirable and to ensure that unintended changes have not occurred in key compo-
nents of food.
Improvement in currently available methods for identifying and assessing
unintended compositional changes in food could further enhance the ability of
product developers and regulators to perform appropriate testing to assure the
safety of food. Whether all such analyses are warranted and are the most appro-
priate methods for discovering unintended changes in food composition that may
have human health consequences remains to be determined.
Scientific advances in agricultural biotechnology continue to improve our
understanding of plant crops, microorganisms, and food-animal genetics. Never-
theless, the public health system continues to face many questions about the im-
pact of agricultural biotechnology on human health. As a result of these new
scientific advances and public concern about the potential for unintended compo-
sitional changes in genetically engineered food that might in turn result in unin-
tended health effects, the National Academies convened this committee to ex-
plore the similarities and differences between genetic engineering and other
genetic modifications, including conventional breeding practices, with respect to
the frequency and nature of unintended effects associated with them—in particu-
lar with regard to potential changes in the biochemical composition of plant- and
animal-derived foods and methods that would be most useful in assessing the
occurrences of unintended changes that might affect consumer health.
ACKNOWLEDGMENTS
The Committee on Identifying and Assessing Unintended Effects of Geneti-
cally Engineered Foods on Human Health was aided in its challenging tasks by
the invaluable contributions of a number of individuals. First and foremost, many
thanks are due to the committee members who volunteered countless hours to the
research, deliberations, and preparation of the report. Their dedication to this
project and to a stringent time-line was commendable and was the foundation of
our success.
Many individuals volunteered significant time and effort to address and edu-
cate our committee members during the workshops. Additionally, the committee
wishes to acknowledge the invaluable contributions of the study staff: Ann
Yaktine, senior program officer and study director; Michael Kisielewski, research
assistant; and Sybil Boggis, senior project assistant. The committee also acknowl-
edges other staff members who contributed to the development and initial con-
duct of this study: Jennifer Kuzma, study director until September 2002; Abigail
Stack, study director until February 2003; and Tamara Dawes, project assistant
until February 2003. This collaborative project benefited from the general guid-
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects
http://www.nap.edu/catalog/10977.html
[...]... and Assessing Unintended Effects of Genetically Engineered Foods on Human Health Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended. .. Less likely More likely Relative likelihood of unintended effects None of the methods in the table carry zero risk of unintended effects only a Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html 4 Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html... National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html 6 SAFETY OF GENETICALLY ENGINEERED FOODS of unintended health effects encompass both targeted and profiling approaches, using a range of toxicological, metabolic, and epidemiological sciences Encompassing both of these approaches. .. effects on human health 1 Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html 2 SAFETY OF GENETICALLY ENGINEERED FOODS Preventing adverse health effects by maintaining a safe food supply requires the application of appropriate scientific methods to problems of predicting... Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html EXECUTIVE SUMMARY 9 Safety Assessment Tools for Assessing Unintended Effects Prior to Commercialization Findings Current voluntary and mandated safety assessment approaches focus primarily on intended and predictable effects of novel... identification of harmful and unexpected side effects As a result, pharmacologists accept postmarket surveillance as a part of the process to identify unexpected adverse outcomes from Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html 12 SAFETY OF GENETICALLY ENGINEERED FOODS. .. research effort should be made to support analytical methods technology, bioinformatics, and epidemiology and dietary survey tools to detect Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html 14 SAFETY OF GENETICALLY ENGINEERED FOODS health changes in the population... Academy of Sciences All rights reserved 175 191 207 211 217 Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html Executive Summary BACKGROUND FOR... framework to questions of identification and assessment of unintended adverse health effects from foods produced by all forms of genetic modification, including genetic engineering, and they can serve as a guide for evaluation of future technologies Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects http://www.nap.edu/catalog/10977.html... adverse health effects from both intended and unintended compositional changes is warranted by elevated concern, such as identification of a novel substance or levels of a naturally occurring substance that exceeds the range of recommended or tolerable intake Copyright © National Academy of Sciences All rights reserved Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health Effects . PRESS
Washington, D.C.
www.nap.edu
SAFETY OF
GENETICALLY
ENGINEERED
FOODS
APPROACHES TO ASSESSING
UNINTENDED HEALTH EFFECTS
Copyright © National Academy of Sciences of America.
Copyright © National Academy of Sciences. All rights reserved.
Safety of Genetically Engineered Foods: Approaches to Assessing Unintended Health
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