摘要:
The present invention covers means and methods to increase the efficiency of recombinant protein expression, in particular to optimize the industrial production of recombinant proteins in insect pupae, particularly in Trichoplusia ni (T. ni) pupae. Moreover, the present invention is also directed to the pupae itself comprising baculovirus, pupae infected, transformed, transduced or transfected with baculovirases or bacmids, as well as devices suitable for performing the methods of the present invention.
摘要:
An insect gene drive system for biocontrol of a population of an insect is provided. The gene drive system includes: a) a first DNA sequence encoding a toxin under the control of a maternal germline-specific promoter active in the insect, with the first DNA sequence being linked to b) a second DNA sequence encoding an antidote under the control of an early embryo-specific promoter active in the insect. The toxin is expressed in maternal germline cells of the insect and results in maternal-effect lethality in the insect, and the antidote is expressed in embryos of the insect and counters the maternal -effect lethality. In some embodiments, the insect is Drosophila suzukii.
摘要:
An all male Culicide mosquito population is created by knocking down its Transformer-2 gene, causing the dysfunction of X chromosome-bearing sperm, hence producing severe biased male progenies. Unlike previous methods, we recently discovered that the Tra-2 knockdown also results in female- specific zygotes lethality (XX). This art is therefore also designed to kill early female zygotes (XX) that may have survived the previous knockdown, and the all male progenies are created only when an antibiotic substance has been added into food and drink to feed mosquitoes. The strict limit of the antibiotic exposure time allows mosquito-adapted Wolbachia bacteria to survive. Selected Wolbachia bacteria may induce cytoplasmic incompatibility (CI) of up to 100%. All the progenies are therefore genetically males, which cause sterility when outcrossing with females infected by another Wolbachia strain (bidirectional CI) or are uninfected (unidirectional CI) in natural environment.
摘要:
Two or more conditional, dominant, lethal gene expression systems provide high levels of penetrance in insects. Lethality is induced at an earlier stage of development and the risk of biochemical resistance is reduced, as compared to a single insect conditional, dominant, lethal gene expression system. The invention is useful for the control of insect populations.
摘要:
The present invention relates to a method for reducing the competitive fitness of an organism hemizygous for a transgenic locus compared to the organism homozygous for the transgenic locus comprising the steps of:(a) reducing the expression of a haploinsufficient gene in the organism, wherein said reduction is conveyed by a transgenic locus in the organism; and (b) rescuing the reduced expression in the organism, wherein said rescue is conveyed by the same transgenic locus in the organism, yielding an organism which is less competitively fit if hemizygous for the transgenic locus than if homozygous for the transgenic locus. The present invention also relates to a method for decreasing the introgression of a transgenic locus in an organism into a population of otherwise interfertile sexually reproducing organisms comprising the steps of: (a) reducing the expression of a haploinsufficient gene in the organism, wherein said reduction is conveyed by a transgenic locus in the organism; (b) rescuing the reduced expression in the organism, wherein said rescue is conveyed by the same transgenic locus in the organism, and (c) using a transgenic organism obtained in step (b) in an environment comprising otherwise interfertile sexually reproducing wildtype individuals of the organism, wherein the competitive fitness of hemizygous progeny is reduced, thereby decreasing the rate of sexually reproduction and/or viability and/or the competitive fitness of hemizygous progeny. Further envisaged are corresponding genetic systems and genetically modified organisms.
摘要:
Reagents and methods are provided that allow for an improved expression of a recombinant protein in an insect, More specifically, the introduction of recombinant DNA elements into an insect larva allows for the increased expression of a recombinant protein, an improvement of the correct folding of said protein and an increase in the survival rate after infection of the insect These recombinant DNA elements can be introduced, for example, into insect larvae via a recombinant baculovirus, which has incorporated said elements. The recombinant DNA elements include nucleic acids encoding transcriptional regulators, such as IE-0 and lE- 1, transcriptional, enhancer elements, such as the homologous region (hr) and promoters.
摘要:
Reagents and methods are provided that allow for an improved expression of a recombinant protein. More specifically, the introduction of recombinant DNA elements into a host cell allows for the increased expression of a recombinant protein, an improvement of the correct folding of said protein and an increase in cell viability and proliferation of the host cell, These recombinant DNA elements can be introduced into host cells, for example, via a recombinant baculovirus, which has incorporated said elements. The recombinant DNA elements include nucleic acids encoding transcriptional regulators, such as IE-0 and IE-1, transcriptional enhancer elements, such as the homologous region ( hr ) and promoters.
摘要:
Described herein are methods of treating nociception by administering to a subject in need thereof a therapeutic amount of one or more compounds which modulate the Hedgehog signaling pathway.