32 results about "Genetically modified insect" patented technology

Disclosed are methods and systems for screening for compounds that act to modulate insect growth. Bioassays including cell culture and/or transgenic insects engineered with various components of the ecdysoid receptor (EcR) and/or the farsenoid-X receptor (RXR) systems to identify compounds that act as insecticides and/or hormone receptor activators are described. Also described are compounds, and compositions, identified as being putative insecticides based upon their ability to activate EcR and/or FXR mediated transcription.

This invention relates, e.g., to transgenic insects, or progeny thereof, whose cells contain at least one genomically integrated, expressible, nucleic acid encoding two or more of a set of Nglycosylation enzymes that can glycosylate a heterologous protein with a mammalianized (e.g., humanized) glycosylation pattern. The glycosylation genes are preferably expressed in the insect cells in catalytic amounts. Also described are methods to use such a transgenic insect to produce heterologous, mammalianized polypeptides of interest.

The subject invention relates in part to the use of insect-protected corn to modify fertility recommendations for given yield targets on any transgenic corn type. The insect-protected plants are unexpectedly more effective at assimilating not only nitrogen but also less valuable nutrients such as phosphorous, potassium and micronutrients such as zinc. The subject invention also relates to the discovery that transgenic corn plants with insect protection traits exhibit drought tolerance. For example, the protected plants are also much more effective at extracting moisture and are therefore more drought resistant and require less supplemental irrigation to produce the same yields as unprotected plants.

A transgenic insect cell line for production of recombinant glycoproteins possessing sulfated, complex N-glycans is provided.

The invention provides a composition used in insect targeted gene knock-in, which includes a single nickase or an encoding polynucleotide thereof; a recombinant factor or an encoding polynucleotide thereof; and optionally, a donor DNA of an exogenous gene. The invention also provides a corresponding gene knock-in method and a method for preparing transgenic insects. The composition and the method in the invention can achieve high-effective homologous recombination integration in insect cells and meanwhile can avoid the defects in gene knock-in technologies in the prior art. The composition also can stably and high-effectively achieve homologous recombination integration of a fragment being more than 10 kb in length in the insect cells, so that the composition can be used for transferring a genetic selection marker into the insect cells, preferably a visible genetic selection marker, which is convenient to determine strains of transgenic insects.

Methods of the disclosed precision guided sterile insect technique (pgSIT) include methods for directing male sexing in a genetically modified insect and methods of producing a progeny of geneticallymodified sterile male insect egg. These methods include integrating at least one nucleic acid sequence into a genome of a first insect, the at least one nucleic acid sequence having at least one firstguide polynucleotide targeting a female-essential genomic sequence that is required for female-specific viability, introducing an endonuclease into a second insect, and genetically crossing the firstinsect and the second insect thereby producing progeny expressing the endonuclease and the at least one nucleic acid sequence. For male sterility a second guide polynucleotide targets a male sterility genomic sequence that is required for male-specific sterility.

Visual self-sucking method for inducing external gene into insect eggs is carried out by: under telescope, coating solution with external genes on insect eggs, pricking eggs to make external gene into eggs, making external genes combined with insect's gene to form transgenic insects. It makes technicians to do researches on transgenic insects with cheap instrument.

The invention relates to an evaluation method of safety of genetically modified insect resistant rice relative to predator hylyphantes graminicola. The evaluation method is composed of a three-level nutrition test part, a protein transfer rule part, a predation function reaction part and a population density and population dynamics comparison part. The influence of Bt-gene modified insect resistant rice on the hylyphantes graminicola is evaluated through the food chain of the hylyphantes graminicola; the way and degree that the hylyphantes graminicola is exposed in Bt proteins are identified through an ELISA detection means; the influence of the Bt-gene modified insect resistant rice on a non-target organism predation function is evaluated; the Bt-gene modified insect resistant rice and non-genetically-modified parent are compared, and the influence on the hylyphantes graminicola population is evaluated; finally, the ecological consequences generated by genetically modified crop cultivation on non-target organisms are evaluated synthetically according to the data of the four parts. The evaluation method is systematic and scientific, and has great significance for the research of the influence of genetically modified crops on the non-target organisms and ecological safety of the genetically modified crop cultivation.

The invention provides a transgenic fat body cell line of high-yield baculovirus and a preparation method as well as application thereof. The cell line which is named as IOZCAS-Spex X has a preservation number of CGMCC No. 4505; and the preparation method of the transgenic fat body cell line comprises following steps of: culturing asparagus caterpillar fat body cells; transforming genes containing human telomerase reverse transeriptase into a known expression vector to obtain a recombinant expression vector; leading the recombinant expression vector into the asparagus caterpillar fat body cells; and enabling the asparagus caterpillar fat body cells to express human telomerase reverse transeriptase so as to obtain the transgenic fat body cell line. In addition, the invention discloses application of the transgenic fat body cell line to production of baculovirus.

A transgenic insect cell line for production of elevated levels of recombinant glycoproteins comprising mammalian-like N-glycans is provided. Also disclosed are nucleic acid sequences encoding β-N-acetylglucosaminidases.

The present invention provides methods for identifying pesticide targets and pesticidal agents using transposable elements in insects and insect cells lines. The invention provides engineered transposable elements for use in identification of pesticide targets. The invention further provides a biological array, a collection of transgenic insect lines or insect cell lines, the genome of each containing at least one transposable element that mutates one of the insect's genes, such that the complete collection contains a mutation in essentially every gene in the insect's genome.

The present disclosure provides genetically modified insect cells that can produce glycosylated expression products having a human-like glycosylation pattern. In particular, the cells comprise disruption of the fdl and/or FucT6 genes. Also provided is expression systems and methods for recombinant protein production.

The present invention relates to methods of facilitating the expression of recombinant polypeptides from cells, extracellular fluids, extracellular fibers, or any combination thereof, obtained from transgenic insect cells and larvae comprising a bacterial GlcNAc-6-P 2′-epimerase (GNPE), which is capable of converting N-acetyl-D-glucosamine-6-phosphate (GlcNAc-6-P) to N-acetyl-D-mannosamine-6-phosphate (ManNAc-6-P). The invention relates to methods to promote efficient glycoconjugate sialylation, by providing simpler ways to produce large intracellular pools of sialic acid precursors. The invention is also directed to nucleic acids, vectors, and cells comprising nucleic acids encoding polypeptides involved in the synthesis of sialic acid precursors, and cells in combination with nucleic acids encoding glycosyltransferases, including sialyltransferases, to facilitate the production of humanized recombinant glycoproteins. The engineered cells can be used to produce glycosylated proteins lepidopteran insects and cultured cell lines derived from Spodoptera frugiperda, Trichoplusia ni, and silkworms, such as Bombyx mori, particularly those that can be infected by baculovirus expression vectors.