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A kind of vero E6 cell line adapted to full suspension culture and application thereof

A technology of veroe6-s and cell lines, which is applied in the direction of animal cells, vertebrate cells, urinary tract/kidney cells, etc., can solve the problems of difficult domestication of cells, inability to achieve optimal growth in cell culture, and high labor intensity, etc., to achieve Solve the requirements of large-scale industrialization, good industrial application prospects, and high degree of automation

Active Publication Date: 2020-06-05
郑州爱科生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the attachment-dependent growth of the original Vero-E6 cells, the production of these viral disease vaccines mainly adopts the traditional spinner bottle process. The production process of vaccine antigen preparation is labor-intensive and the probability of contamination is high, and the quality of the vaccine is unstable. The difference is large. This traditional process is gradually replaced by automated production in today's large-scale industrial production needs.
Bioreactor cell suspension culture has become the main research force of the current vaccine industry automation production process. Because of the difficulty of cell domestication and long research and development cycle, many enterprises choose carrier-dependent cell suspension culture. A method for preparing porcine epidemic diarrhea virus in a torrent bioreactor" and the patent publication number is CN 101804203 A "A method for large-scale production of pseudorabies virus vaccine", and the patent publication number is CN 102038946A "Industrial production of pseudorabies virus vaccine using bioreactor The method of rabies vaccine" and the patent publication number are CN 104587460 A "mink viral enteritis, canine distemper dual live vaccine and its preparation method and application"; although this kind of microcarrier and paper carrier suspension culture is more traditional The degree of automation is high, but cell culture is limited by carrier factors and cannot achieve optimal growth. Compared with cell suspension culture, carrier-dependent culture increases the production process and increases production costs. The degree of scale-up is limited, and it is only the initial stage of cell suspension culture.

Method used

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  • A kind of vero E6 cell line adapted to full suspension culture and application thereof
  • A kind of vero E6 cell line adapted to full suspension culture and application thereof
  • A kind of vero E6 cell line adapted to full suspension culture and application thereof

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Effect test

Embodiment 1

[0029] Embodiment 1: Adapt to the cultivation of the Vero E6-S cell strain of full suspension culture

[0030] Vero E6-S is preserved in the China Center for Type Culture Collection with the preservation number CCTCC C2017101.

[0031] ①Take a well-growing Vero E6-S cell line, add it to a shake flask filled with nutrient solution, culture it at 36-37°C for 72-96 hours, and subculture and enlarge it according to the ratio of 1:3-1:4;

[0032] ② Dilute the Vero E6-S cell line amplified in step ① to (6-10)×10 5 Cells / ml density, inoculated into bioreactor, culture temperature is 36-37℃, pH value is 6.8-7.2, dissolved oxygen is 40%-60%, Vero E6-S cell suspension growth curve is as follows: figure 1 As shown, suspension growth pictures see figure 2 ;

[0033] ③ Determination of cell density in three batches of bioreactors: three batches of VeroE6-S cells were continuously cultured in a bioreactor, and the culture conditions were the same as in step ②. Samples were taken at the ...

Embodiment 2

[0035] Embodiment 2: utilize Vero E6-S suspension culture cell to cultivate the method for porcine epidemic diarrhea virus

[0036] Take well-grown suspension Vero E6-S cells, press 6.5×10 5 Cells / ml density, inoculated into bioreactor, cell culture conditions: reactor working volume 5.0 liters, cell culture temperature 37 ℃, pH value 7.0, dissolved oxygen 50%, culture 72 hours, cell density 44.7 ×10 5 Individuals / ml, replace with the virus culture maintenance medium that contains 1.0% newborn bovine serum, add trypsin according to the amount of 10ug / ml, inoculate porcine epidemic diarrhea virus according to 10% of virus culture maintenance medium volume at the same time, virus culture The conditions are: temperature 36.5°C, pH value 6.9, dissolved oxygen 45%, culture for 48 hours to harvest the virus liquid, the virus titer is determined according to the standard of "Regulations of Veterinary Biological Products of the People's Republic of China", and the harvested virus con...

Embodiment 3

[0037] Embodiment 3 Utilize the method of Vero E6-S suspension culture cell culture porcine pseudorabies virus

[0038] Take well-grown suspended Vero E6-S cells, press 7.4×10 5 Cells / ml density, inoculated into bioreactor, cell culture conditions: reactor working volume 5.0 liters, cell culture temperature 36.5 ℃, pH value 6.8, dissolved oxygen 50%, culture 88 hours, cell density 47.1 ×10 5 Each / ml, replace with the virus culture maintenance medium containing 2.0% newborn bovine serum, and inoculate porcine pseudorabies virus according to 5% of the volume of the virus culture maintenance medium at the same time, the virus culture conditions are: temperature 36.5 ℃, pH value 7.0 , the dissolved oxygen was 55%, and the virus liquid was harvested after 36 hours of cultivation. The virus titer was judged according to the "Regulations of Veterinary Biological Products of the People's Republic of China", and the harvested virus content was 8.5 TCID 50 / ml.

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Abstract

The invention discloses a vero E6 cell strain adapting to full-suspension culture, the vero E6 cell strain is named as vero E6-s, and is preserved in China Center for Type Culture Collection, the preservation number is CCTCC2017101, the vero E6 cell strain is classified and named as Vero cell suspension adaptive strain VeroE6-S, and the preservation date is June 29, 2017. Compared with the prior art, the vero E6 cell strain adapting to the full-suspension culture has high degree of automation for culture of vaccine viruses, can be suspended and cultured in a serum-free or low-serum medium without carrier intervention, and solves large-scale industrialization requirements of virus cultivation, a large-scale production method meeting GMP production technology requirements can be developed, and the large-scale production method has a good prospect of industrialization.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a vero E6 cell strain adapted to full suspension culture and application thereof. Background technique [0002] Vero-E6 cells are the African green monkey kidney cell line, which belongs to epithelial cells and is derived from the African green monkey kidney cells. It is a clone of the mother cell Vero 76, grows in an anchorage-dependent manner, can be continuously subcultured, and has no tumorigenicity. Suspension-adapted strains are obtained after several times of suspension acclimatization of cell lines, which can grow in suspension without relying on the carrier. The cells are particularly sensitive to porcine epidemic diarrhea virus, rabies virus, porcine pseudorabies virus, canine distemper virus, canine adenovirus, and canine parainfluenza virus, and are currently widely used in the production of vaccines for these viral diseases. [0003] Due to the attachment-de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N5/071C12N7/00
CPCC12N5/0686C12N7/00
Inventor 李少英徐树兰
Owner 郑州爱科生物科技有限公司
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