ArticleArchives of Razi Institute2020
Comparative Evaluation of Human Papillomavirus Type 16 L1 Protein Expressed in Plasmid- and Baculovirus-Based Systems in Insect Cells.
Article in Archives of Razi Institute, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
2 citing papers in PubMed, 2 citations in OpenAlex.
- Development of VP1 based indirect ELISAs for BK and JC polyomaviruses with seroprevalence assessment and cross reactivity evaluation.Scientific reports · 2026Article
- A Preclinical Immunogenicity Study of the Recombinant Human Papillomavirus Nine-Valent Virus-like Particle Vaccine.Vaccines · 2024Article
Corrections and comments
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Authors and funding
1 author.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Human papillomavirus (HPV) has been associated with specific types of papillomas, lesions at particular anatomic sites, and malignancies. The HPV16 and HPV18 have been shown to play a role in a variety of carcinomas. The most documented HPV-associated cancer is cervical carcinoma. Suitable antigens are needed to be identified for the diagnostic tests and vaccines and the expression of L1 recombinant protein should be accelerated in papillomaviruses. Therefore, in this study, the expression of the L1 protein of HPV16 was evaluated and compared in insect cells using a plasmid and a baculovirus system. The expression of the L1 protein of HPV16 in insect cells was investigated using a plasmid (InsectDirect) and a baculovirus system (BacMagic). The expressed recombinant proteins were purified from the Sf9 lysate using Ni-NTA resin columns. The characterization of recombinant L1 protein expressed in both systems (BacMagic and InsectDirect) was performed using immunofluorescence, SDS-PAGE, western blot, and dot blot. The yields of the purified proteins from the plasmid- and baculovirus-based systems (10 ml culture; 107 cells) had the ranges of 455-495 µg/ml and 1.44-1.6 mg/ml as analyzed by spectrophotometer, respectively. The SDS-PAGE analysis of purified proteins revealed that the recombinant proteins with the expected size of 58 KDa were produced in both InsectDirect and baculovirus systems. A high degree (95%) of purification was achieved using this system as observed in SDS-PAGE. The purified L1 protein in the baculovirus system was clearly more efficient than the InsectDirect system. The results of this study indicate that the BacMagic system is an appropriate tool for large scale protein production and provides an alternative to the traditional baculovirus system. In addition, the InsectDirect system might provide a rapid and dependable pointer of whether a protein can be successfully produced in a baculovirus system. Both InsectDirect and BacMagic systems present remarkable savings in cost and time.
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Registered trials
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