Cited by 60SARS-CoV-2 and COVID-19 ResearchViral Infectious Diseases and Gene Expression in InsectsImmunotherapy and Immune Responses

Virus-Like Particles of SARS-Like Coronavirus Formed by Membrane Proteins from Different Origins Demonstrate Stimulating Activity in Human Dendritic Cells

Open access
Bai, Bingke, Hu, Qinxue, Hu, Hui, Zhou, Peng, Shi, Zhengli, Meng, Jin, Lu, Baojing, Huang, Yi +2 more·2008·PLoS ONE

Abstract

The pathogenesis of SARS coronavirus (CoV) remains poorly understood. In the current study, two recombinant baculovirus were generated to express the spike (S) protein of SARS-like coronavirus (SL-CoV) isolated from bats (vAcBS) and the envelope (E) and membrane (M) proteins of SARS-CoV, respectively. Co-infection of insect cells with these two recombinant baculoviruses led to self-assembly of virus-like particles (BVLPs) as demonstrated by electron microscopy. Incorporation of S protein of vAcBS (BS) into VLPs was confirmed by western blot and immunogold labeling. Such BVLPs up-regulated the level of CD40, CD80, CD86, CD83, and enhanced the secretion of IL-6, IL-10 and TNF-alpha in immature dendritic cells (DCs). Immune responses were compared in immature DCs inoculated with BVLPs or with VLPs formed by S, E and M proteins of human SARS-CoV. BVLPs showed a stronger ability to stimulate DCs in terms of cytokine induction as evidenced by 2 to 6 fold higher production of IL-6 and TNF-alpha. Further study indicated that IFN-gamma+ and IL-4+ populations in CD4+ T cells increased upon co-cultivation with DCs pre-exposed with BVLPs or SARS-CoV VLPs. The observed difference in DC-stimulating activity between BVLPs and SARS CoV VLPs was very likely due to the S protein. In agreement, SL-CoV S DNA vaccine evoked a more vigorous antibody response and a stronger T cell response than SARS-CoV S DNA in mice. Our data have demonstrated for the first time that SL-CoV VLPs formed by membrane proteins of different origins, one from SL-CoV isolated from bats (BS) and the other two from human SARS-CoV (E and M), activated immature DCs and enhanced the expression of co-stimulatory molecules and the secretion of cytokines. Finding in this study may provide important information for vaccine development as well as for understanding the pathogenesis of SARS-like CoV.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1371/journal.pone.0002685

Cites

49 of 49 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • VLPs are nanoscale structures made up of one or more different molecules with the ability to self-assemble, mimicking the form and size of a virus particle, but lacking viral genetic material and being non-infectious.

    “VLPs are nanoscale structures made up of one or more different molecules with the ability to self-assemble, mimicking the form and size of a virus particle, but lacking the viral genetic material and being non-infectious [80].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 50 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Bai, B., Hu, Q., Hu, H., Zhou, P., Shi, Z., Meng, J., Lu, B., Huang, Y., Mao, P., & Wang, H.
Affiliations
  • Chinese Academy of Sciences (CN)
  • National Institute for Communicable Disease Control and Prevention (CN)
Corresponding author
Wang, Hanzhong
Venue
PLoS ONE
Published
2008-07-16
Volume
3
Issue
7
Pages
e2685
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2046789235
Cited by
59
References
50
Citations by year
2026: 1 · 2025: 7 · 2024: 7 · 2023: 6 · 2022: 9 · 2021: 9 · 2020: 5 · 2016: 1 · 2015: 1 · 2014: 2 · 2013: 3 · 2012: 1
FWCI
1.51
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Informationszentrum Lebenswissenschaften (ZB MED) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Chinese Academy of Sciences (KSCX1-YW-R-07)
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
SARS-like coronaviruses, SARS coronavirus, virus-like particles, recombinant baculovirus, spike protein, envelope protein, membrane proteins, dendritic cell activation, costimulatory molecules, cytokine production, interleukin-6, TNF-α, IL-10, CD4+ T cell responses, DNA vaccine, bat coronaviruses, vaccine development
MeSH terms
Cell Differentiation, Dendritic Cells, Humans, Immune System, Interferon-gamma, Leukocytes, Mononuclear, Membrane Proteins, Phenotype, Plasmids, CD4-Positive T-Lymphocytes, Interleukin-4, Cytokines, Baculoviridae, Th1 Cells, Severe acute respiratory syndrome-related coronavirus

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review