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Product of transegenic plant for expressing coat protein of human rotavirus and application for preventing infant diarrhea

A technology of human rotavirus and transgenic plants, applied in plant products, animal/human protein, anti-animal/human immunoglobulin, etc., can solve the problem of ineffective protection of rotavirus infection and protein glycosylation And other issues

Inactive Publication Date: 2005-08-31
INST OF IMMUNOLOGY P L A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] (2) Pathogenic proteins can complete post-translational processing in plants, such as glycosylation and spatial folding of advanced structures, so that this recombinant protein polypeptide has the same immunogenicity as natural proteins, which is unmatched by prokaryotic expression systems , which cannot glycosylate proteins of eukaryotic origin
Moreover, rotavirus antigens from different species cannot effectively protect other species of rotavirus infection

Method used

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  • Product of transegenic plant for expressing coat protein of human rotavirus and application for preventing infant diarrhea
  • Product of transegenic plant for expressing coat protein of human rotavirus and application for preventing infant diarrhea
  • Product of transegenic plant for expressing coat protein of human rotavirus and application for preventing infant diarrhea

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Example 1: Construction of Rotavirus Coat Protein Antigen Plant Expression Vector PBI121 / VP7

[0087]As shown in Figure 1, the total RNA of rotavirus (serotype G1) was isolated from the feces of children with diarrhea as a template, and specific primers were synthesized according to the known nucleic acid sequence of rotavirus RNA. See the sequence for the specific base sequence Seq.ID.No.1-2 in the list, and the rotavirus coat protein VP7 gene was obtained by polymerase chain reaction (PCR) amplification. The endoplasmic reticulum retention sequence SEKDEL was introduced into the 3' end primer. For the specific base sequence, see Seq.ID.No.3 in the sequence list. Using the above-mentioned PCR product that was successfully amplified as a template, the upstream primer remained unchanged and was amplified again. . The PCR product was recovered, purified, and cloned directly into the PUC-T vector, and the reverse inserted clone was selected by enzyme digestion and named P...

Embodiment 2

[0091] Example 2. Introducing the expression vector PBI121 / VP7 into Agrobacterium (A. tumefaciens)

[0092] Plasmid PBI121 / VP7 containing rotavirus coat protein antigen gene VP7 was transferred into Agrobacterium strain LBA4404 by electroporation, which was from Clonetech Company, USA. Strain LBA4404 is now widely used because it is a modified Agrobacterium that contains the complete Vir gene, but the T-DNA has been deleted. Vir gene can transregulate the transfer of T-DNA from plasmid PBI121 / VP7 to plant cells.

[0093] Centrifuge 20ml of the Agrobacterium solution with an OD value of 0.6-0.8, wash twice with deionized water, and resuspend in 1ml of 10% glycerol; add 2μl (about 50ng) of the recombinant plasmid PBI121 / VP7 to 40μl of the bacteria solution, and mix well; parameters Settings: the electroporation cup is 0.1cm, the capacitance is 25μF, the resistance is 200Ω, and the electric field strength is 18kv / cm. After the electric shock, add 0.8ml of LB and 20μl of 1M gluc...

Embodiment 3

[0095] Example 3. Agrobacterium-mediated plant genetic transformation

[0096] The genetic transformation of plants starts with the co-culture of plant tissues and organs with Agrobacterium, and after about 2 days of culture, the plant explants are transplanted into the corresponding selection medium. Plant explants can be protoplasts, callus or other organ tissues, depending on the plant. We chose cotyledon or stem segment transformation methods.

[0097] Potato sterile seedlings [the variety is Taiwanhong (Taiwanhong), provided by the Biotechnology Center of Southwest Agricultural University]. Grow in a light incubator at 23°C, supplemented by medium light intensity, cut off the top shoots every 3 weeks, and replant them in MS solid medium without any antibiotics. The potato stems that have grown for 2 weeks are the most suitable for conversion. Tomatoes (provided by Chongqing Crop Research Institute) were transformed with 7-10 days old cotyledon or hypocotyl sterile expl...

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Abstract

A transgenic plant able to express the coat protein of humanized rotavirus, its preparing process, and its application for preventing infantile diarrhea are disclosed.

Description

technical field [0001] The present invention relates to a production method of transgenic plants expressing human rotavirus coat protein, and then using these transgenic plants containing human rotavirus coat protein and derivatives thereof to induce human or lactation through direct consumption or enteral administration. The animal's immune response responds to the antigenic protein. Background technique [0002] Human rotavirus (human rotavirus, HRV) is the main cause of diarrhea in infants and young children, and it is also the disease with the highest child mortality in third world countries (World Health Statistics Report 1998). HRV spreads all over the world, and nearly one million children die from RV diarrhea every year. Preliminary data in my country show that there are about 100,000 children every year. Hygiene measures appear to have little effect on the transmission of RV, and nutritional status is far less important for the risk than bacterial diarrhea, since a...

Claims

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Application Information

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IPC IPC(8): A01H5/00A61P1/12C07K14/14C07K14/705C07K16/28C12N5/04C12N15/12C12N15/46C12N15/62
Inventor 吴玉章李晋涛
Owner INST OF IMMUNOLOGY P L A
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