WO1998022603A1 - Beauvericin detoxification compositions and methods - Google Patents
Beauvericin detoxification compositions and methods Download PDFInfo
- Publication number
- WO1998022603A1 WO1998022603A1 PCT/US1997/021207 US9721207W WO9822603A1 WO 1998022603 A1 WO1998022603 A1 WO 1998022603A1 US 9721207 W US9721207 W US 9721207W WO 9822603 A1 WO9822603 A1 WO 9822603A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microorganism
- beauvericin
- accession number
- atcc accession
- species
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
- A23L5/28—Removal of unwanted matter, e.g. deodorisation or detoxification using microorganisms
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
- A01N63/20—Bacteria; Substances produced thereby or obtained therefrom
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
- A01N63/20—Bacteria; Substances produced thereby or obtained therefrom
- A01N63/22—Bacillus
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
- A23L7/10—Cereal-derived products
- A23L7/104—Fermentation of farinaceous cereal or cereal material; Addition of enzymes or microorganisms
Definitions
- the present invention relates generally to the detection and isolation of beauvericin-degrading organisms and to compositions and methods for detoxification or degradation of beauvericin in grain. This method has broad application in agricultural biotechnology and crop agriculture and in the improvement of food grain quality and feed safety.
- Fungal diseases are common problems in crop agriculture. Many strides have been made against plant diseases as exemplified by the use of hybrid plants, pesticides and unproved agricultural practices. However, as any grower or home gardener can attest, the problems of fungal plant disease continue to cause difficulties in plant cultivation. Thus, there is a continuing need for new methods and materials for solving the problems caused by fungal diseases of plants. These problems can be met through a variety of approaches.
- the infectious organisms can be controlled through the use of agents that are selectively biocidal for the pathogens. Another method is interference with the mechanism by which the pathogen invades the host crop plant. Yet another method, in the case of pathogens that cause crop losses, is interference with the mechanism by which the pathogen causes injury to the host crop plant.
- Fusarium is known to cause root, stem and ear rot that results in severe crop reduction.
- the etiology of Fusarium ear mold is poorly understood, although physical damage to the ear and certain environmental conditions can contribute to its occurrence(Nelson PE (1992) "Taxonomy and Biology of Fusarium moniliforme " Mycopathologia 117: 29-36). Fusarium may be isolated from most field grown maize, when no visible mold is present.
- the mycotoxins produced by the Fusarium species that infect plants may accumulate in infected plants or in stored grains, presenting serious health consequences for livestock, humans, and other consumers of meat or other food products of such livestock. Fusarium infection has been associated with chronic or acute mycotoxicoses in both farm animals and man (Botallico, et al.). An important mycotoxin that has been found to be produced by certain Fusarium sp. and has been identified in Fusarium infected crops is beauvericin.
- Beauvericin is a fungal toxin produced by various Fusarium species, as well as the fungus Beauveria bassiana. Beauvericin is a cyclic peptide, with toxic effects on insects as well as both human and murine cell lines. The activity of beauvericin is due to the ionophoric properties of the compound. Beauvericin is capable of forming complexes with alkali metal cations and affects ion transport across cell membranes. In addition, beauvericin has been reported to be one of the most powerful inhibitors of cholesterol acetyltransferase. Beauvericin has also been shown to induce a type of cell death very similar to apoptosis. Circumstantial evidence further indicates that beauvericin acts in concert with other Fusarium toxins to cause additional toxic effects (1). Beauvericin has been reported to be found at significant levels in corn from Italy,
- the present invention provides an organism having the ability to degrade or detoxify beauvericin or a structurally related mycotoxin.
- the present invention may further include a mutant of the wild-type organism that has the ability to degrade or detoxify beauvericin or a structurally related mycotoxin.
- the present invention further provides a method for detoxification of plants pre- or post-harvest using a microbe having the ability to degrade or detoxify beauvericin or a structurally related mycotoxin.
- the present invention is based on the discovery of an organism having the ability to degrade the mycotoxin beauvericin.
- the present invention has resulted from a search for a biological means of detoxifying beauvericin and comprises several bacterial species, isolated from moldy wheat and residential compost, capable of growing on beauvericin as a sole carbon source, degrading it partially or completely in the process.
- a microbe is defined as any microorganism (including both eukaryotic and prokaryotic organisms) such as fungi, yeasts, bacteria, actinomycetes, algae and protozoa, as well as other unicellular structures capable of growth in culture.
- a beauvericin-producing microbe is any microbe capable of producing the mycotoxin beauvericin or analogs thereof. Such microbes are generally members of the fungal genus Fusarium, as well as recombinantly derived organisms which have been genetically altered to enable them to produce beauvericin or analogues thereof.
- degrading beauvericin having the ability to degrade beauvericin, is meant any modification or ability to make any modification to the beauvericin molecule or a structurally related molecule that causes a decrease in or loss of its toxic activity. Such a change can comprise cleavage of any of the bonds, oxidation, reduction, the addition or deletion of a chemical moiety, or any other change that affects the activity of the molecule.
- chemically altered beauvericin may be isolated from cultures of microbes that produce an enzyme of this invention, such as by growing the organisms on media containing radioactively-labeled beauvericin, tracing the label, and isolating the degraded toxin for further study. The degraded beauvericin may be compared to the active compound for its phytotoxicity or mammalian toxicity in known sensitive species, such as porcines.
- mycotoxin any mycotoxin having a chemical structure related to a beauvericin or analog of beauvericin, as well as other mycotoxins having similar chemical structures that would be expected to de detoxified by activity of the beauvericin degradative enzymes.
- Harvested grain is defined as any form of grain which has been somehow removed from the environment in which it was grown. For example, harvested grain may comprise ear corn, or corn kernels, for example. Harvested grain may further comprise that in storage or that being processed. Processed grain is grain that has been through some form of processing and will be used in the production of food for human consumption or will be used as animal feed (“feed grain”).
- plant refers to a photo synthetic organism including but not limited to an algae, moss, fern, gymnosperm, or angiosperm.
- said plant is one from which feed grain (preferably for human or animal consumption) may be harvested ("harvested grain”).
- feed grain preferably for human or animal consumption
- said plant includes any variety of corn (maize), wheat, sorgum, rice and barley.
- a mature plant is defined as a plant in which normal development of all vegetative and reproductive organs has occurred.
- a plant cell includes any cell derived from a plant, including callus as well as protoplasts, and embryonic and gametic cells.
- the present invention comprises a methodology for the isolation of a microorganism having the ability to degrade beauvericin or a structurally related mycotoxin, a microorganism having the ability to degrade beauvericin or a structurally related mycotoxin, and a methodology for degradation of beauvericin or a structurally related mycotoxin on a plant in the field as well as on harvested grain.
- Said microorganism may include but is not limited to bacteria and fungi.
- an assay was developed in which a microorganism is initially isolated from a source material.
- Said source material may comprise any plant or plant-associated material including but not limited to any green tissue such as the stalk, leaf, ear, or kernel.
- Plant-associated material may include but is not limited to soil in close approximation to the plant.
- Said microorganism is then cultured in media having beauvericin as the sole carbon source. The media is then observed for the disappearance of the beauvericin crystals that are initially present in said media prior to culturing said microorganism in said media. The disappearance of said crystals is understood to indicate that said microroganism in said culture has the ability to degrade beauvericin.
- the assay is termed a "crystal disappearance" assay.
- a mature plant is inoculated with a beauvericin-producing organism and then treated with an appropriate amount of bacteria having the ability to degrade or detoxify beauvericin or its derivatives or analogs.
- the treatment may comprise application of a composition comprising an efficacious amount of an organism having the ability to degrade beauvericin to said plant whereby the beauvericin present is degraded.
- said application consists of topically applying said composition upon the tissues of said plant, such that beauvericin upon said tissues is degraded.
- said plant may be treated with said organism following harvest (treatment of harvested grain).
- An important utility for the present invention is the detoxification of zearalenone present in grain following harvest.
- a suitable feed material or “sample” is spiked with a known amount of mycotoxin delivered in a suitable solvent, preferably ethanol, at an appropriate rate, preferably one ml solvent per gram, followed by sufficient mixing to distribute said mycotoxin throughout said material.
- a control sample preferably receives solvent only.
- the final concentration of said mycotoxin is preferably between 0.1 and 1.0 mg per gram of feed material. The sample may then be air-dried to remove excess solvent.
- the sample is next innoculated with 10 - 10 colony forming untis (cfu)/g of log-phase cells of a microorganism having the ability to degrade said mycotoxin, at a sufficient rate, preferably one ml cells per gram, followed by sufficient mixing to distribute said cells throughout said sample.
- a control sample may comprise cells that have been killed by heating, preferably to approximately 80°C.
- a control sample may further comprise cells of a microorganism that is not able to degrade said mycotoxin.
- Said samples are then placed into a container, said container is closed and incubated for a sufficient period of time at an appropriate temperature. Said period of time is preferably within the range of one day to two weeks and said temperature is preferably room temperature or approximately 28°C.
- said mycotoxin is preferably beauvericin.
- the metabolism of beauvericin was measured using a crystal disappearance assay. Microbes were washed from the source material by placing a small amount in a seven milliliter Falcon tube and adding one to two milliliters sterile distilled water (producing "wash fluid"). Maize kernels were split with a razor blade and one to two kernels were used. Tubes were capped and shaken for one to three hours at room temperature. Beauvericin (Sigma Cat. No. B7510) was prepared as a suspension in mineral salts medium, and was utilized as the sole carbon source. The beauvericin concentration utilized includes but is not limited to 0.75 - 1.0 milligrams/milliliter in mineral salts medium.
- the mineral salts medium was prepared by combination of reagents including but not limited to 1.0 g/L ammonium sulfate, 1.0 g/L sodium chloride, 1.0 g/L potassium phosphate, dibasic, 0.2 g L magnesium sulfate. Sterilization of the solution was accomplished by filtration through a 0.2 micron filter, although various methods for sterilization are available to those skilled in the art. 100 microliters of beauvericin/mineral salts suspension medium was added to each well of a microtiter plate (96 well plate). One microliter of fresh wash fluid was added to each well. Control wells received one microliter of water.
- the instant invention comprises a biologically pure culture of a microorganism responsible for beauvericin degradation. Said microorganism was isolated using the following procedure. One microliter was taken from positive wells and added to one milliliter of sterile water.
- YDP agar plates were prepared by combination of 10 grams yeast extract (Difco), 20 g Bacto peptone, 0.5 g dextrose, 15 g Bacto agar in water followed by sterilization by autoclaving.
- mature plants are inoculated with a beauvericin-producing Fusarium sp. and then treated with an appropriate amount of bacteria having the ability to degrade or detoxify beauvericin or its derivatives or analogs.
- the treatment consists of topically applying a composition comprising an efficacious amount of bacteria onto the tissues of the maize plant such that beauvericin, including any derivatives or analogs of beauvericin, is partially or completely degraded or detoxified.
- a one to ten gram sample of cracked corn is combined or "spiked" with a known amount of beauvericin in ethanol at a concentration of one gram beauvericin per ml of ethanol, followed by mixing to distribute the beauvericin throughout the mixture.
- a control sample or samples are mixed with solvent alone. The sample is then air-dried to remove excess solvent. The samples are then inoculated with 10 6 cfu/g of log-phase cells of a microorganism having the ability to degrade beauvericin, designated BEA(2)2904.G4 (deposited with the ATCC under accession number ATCC 55850) at a rate of one ml cells per gram, and mixed well to distribute said cells within said sample.
- Controls are mixed with either cells of said microorganism [designated BEA(2)2904.G4, deposited with the ATCC under ATCC accession number 55850] that have been heated to 80°C, such that said cells are non- viable or with cells of a microorganism that does not have the ability to degrade beauvericin.
- Said mixture is placed in a container, which is then closed and incubated for two weeks at room temperature. At the end of the incubation period, the container is opened, and the entire contents extracted in a suitable organic solvent to recover the beauvericin.
- the extract is concentrated and subjected to qualitative and quantitative analysis for detection of beauvericin. The amount of beauvericin is determined and compared to controls.
- the efficacy of removal of beauvericin is determined by comparison of the percent reduction (if any) of the amount of beauvericin in the sample comprising the micoorganism having the ability to degrade beauvericin to the reduction of the amount of beauvericin present in said control sample.
- Microorganisms designated BEA(1)2904.A12 (ATCC accession number 55849), BEA(1)2905.D1 (ATCC accession number 55848), or BEA(1)2904.B11 (ATCC accession number 55847) are also able to degrade beauvericin, and may be utilized for the above-described purpose.
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT97949496T ATE201048T1 (en) | 1996-11-22 | 1997-11-12 | COMPOSITIONS AND METHODS FOR DETOXIFYING BEAUVERICIN |
AU73020/98A AU740006B2 (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxification compositions and methods |
BR9713377-9A BR9713377A (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxification methods and compositions |
HU9903577A HU221991B1 (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxification compositions and methods |
CA002270116A CA2270116C (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxification compositions and methods |
EP97949496A EP0938576B1 (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxification compositions and methods |
DE69704786T DE69704786T2 (en) | 1996-11-22 | 1997-11-12 | COMPOSITIONS AND METHODS FOR DETOXIFYING BEAUVERICIN |
JP52386498A JP2001504348A (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxifying compositions and methods |
GR20010401134T GR3036285T3 (en) | 1996-11-22 | 2001-07-26 | Beauvericin detoxification compositions and methods |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/753,287 US5798255A (en) | 1996-11-22 | 1996-11-22 | Beauvericin detoxification compositions and methods |
US08/753,287 | 1996-11-22 |
Publications (1)
Publication Number | Publication Date |
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WO1998022603A1 true WO1998022603A1 (en) | 1998-05-28 |
Family
ID=25030006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/021207 WO1998022603A1 (en) | 1996-11-22 | 1997-11-12 | Beauvericin detoxification compositions and methods |
Country Status (14)
Country | Link |
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US (3) | US5798255A (en) |
EP (1) | EP0938576B1 (en) |
JP (1) | JP2001504348A (en) |
AT (1) | ATE201048T1 (en) |
AU (1) | AU740006B2 (en) |
BR (1) | BR9713377A (en) |
CA (1) | CA2270116C (en) |
DE (1) | DE69704786T2 (en) |
ES (1) | ES2158603T3 (en) |
GR (1) | GR3036285T3 (en) |
HU (1) | HU221991B1 (en) |
PT (1) | PT938576E (en) |
TR (1) | TR199901136T2 (en) |
WO (1) | WO1998022603A1 (en) |
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BR112016005543B1 (en) | 2013-09-13 | 2022-03-08 | Pioneer Hi-Bred International, Inc | RECOMBINANT PIP-72 POLYPEPTIDE, DNA CONSTRUCTION, METHOD FOR OBTAINING A TRANSGENIC PLANT, HOST CELL, COMPOSITION, FUSION PROTEIN, METHOD FOR CONTROLLING AN INSECT PEST POPULATION, METHOD FOR INHIBITING THE GROWTH OR KILLING AN INSECT PEST, METHOD FOR TO CONTROL AN INSECT INFESTATION IN A TRANSGENIC PLANT, METHOD FOR IDENTIFYING A NUCLEOTIDE SEQUENCE IN A BIOLOGICAL SAMPLE, METHOD FOR IDENTIFYING A PIP-72 POLYPEPTIDE IN A SAMPLE |
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CN108064233B (en) | 2015-05-19 | 2022-07-15 | 先锋国际良种公司 | Insecticidal proteins and methods of use thereof |
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WO2018013333A1 (en) | 2016-07-12 | 2018-01-18 | Pioneer Hi-Bred International, Inc. | Compositions and methods to control insect pests |
US11021716B2 (en) | 2016-11-01 | 2021-06-01 | Pioneer Hi-Bred International, Inc. | Insecticidal proteins and methods for their use |
BR112022027035A2 (en) | 2020-07-14 | 2023-04-11 | Pioneer Hi Bred Int | INSECTICIDAL PROTEINS AND METHODS FOR THE USE OF THEM |
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1996
- 1996-11-22 US US08/753,287 patent/US5798255A/en not_active Expired - Fee Related
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1997
- 1997-11-12 HU HU9903577A patent/HU221991B1/en not_active IP Right Cessation
- 1997-11-12 DE DE69704786T patent/DE69704786T2/en not_active Expired - Fee Related
- 1997-11-12 AU AU73020/98A patent/AU740006B2/en not_active Ceased
- 1997-11-12 AT AT97949496T patent/ATE201048T1/en not_active IP Right Cessation
- 1997-11-12 EP EP97949496A patent/EP0938576B1/en not_active Expired - Lifetime
- 1997-11-12 TR TR1999/01136T patent/TR199901136T2/en unknown
- 1997-11-12 BR BR9713377-9A patent/BR9713377A/en not_active IP Right Cessation
- 1997-11-12 JP JP52386498A patent/JP2001504348A/en active Pending
- 1997-11-12 CA CA002270116A patent/CA2270116C/en not_active Expired - Fee Related
- 1997-11-12 WO PCT/US1997/021207 patent/WO1998022603A1/en active IP Right Grant
- 1997-11-12 ES ES97949496T patent/ES2158603T3/en not_active Expired - Lifetime
- 1997-11-12 PT PT97949496T patent/PT938576E/en unknown
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1998
- 1998-01-29 US US09/015,538 patent/US6126934A/en not_active Expired - Lifetime
- 1998-06-01 US US09/088,326 patent/US6117668A/en not_active Expired - Lifetime
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2001
- 2001-07-26 GR GR20010401134T patent/GR3036285T3/en not_active IP Right Cessation
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DE4205196A1 (en) * | 1991-03-14 | 1992-09-17 | Morinaga & Co | Inhibition of mycotoxin contamination of crops by Fusarium - by admin. of bacillus subtilis strain |
WO1996020595A1 (en) * | 1994-12-30 | 1996-07-11 | Proguard, Inc. | Modulating toxic metabolite levels in consumable products |
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Also Published As
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GR3036285T3 (en) | 2001-10-31 |
US6117668A (en) | 2000-09-12 |
DE69704786D1 (en) | 2001-06-13 |
AU7302098A (en) | 1998-06-10 |
HUP9903577A3 (en) | 2000-04-28 |
DE69704786T2 (en) | 2001-08-23 |
JP2001504348A (en) | 2001-04-03 |
TR199901136T2 (en) | 1999-08-23 |
AU740006B2 (en) | 2001-10-25 |
BR9713377A (en) | 2000-10-24 |
ATE201048T1 (en) | 2001-05-15 |
EP0938576A1 (en) | 1999-09-01 |
US5798255A (en) | 1998-08-25 |
EP0938576B1 (en) | 2001-05-09 |
PT938576E (en) | 2001-09-28 |
CA2270116C (en) | 2001-01-09 |
US6126934A (en) | 2000-10-03 |
HUP9903577A2 (en) | 2000-03-28 |
HU221991B1 (en) | 2003-03-28 |
ES2158603T3 (en) | 2001-09-01 |
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