Evidence map›Paper›PMID 18327552›Full record

ArticleMolecular biotechnology2008

Transient transfection factors for high-level recombinant protein production in suspension cultured mammalian cells.

Chaoting Liu, Brian Dalby, Weixing Chen, Jennifer M Kilzer, Henry C Chiou

Abstract read
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In one paragraph

Article in Molecular biotechnology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.2field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 95 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Chaoting LiuResearch and Development, Invitrogen Corporation, 1600 Faraday Avenue, Carlsbad, CA 92008, USA. chaoting.liu@invitrogen.com
Brian Dalby
Weixing Chen
Jennifer M Kilzer
Henry C Chiou

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The efficient transfection of cloned genes into mammalian cells system plays a critical role in the production of large quantities of recombinant proteins (r-proteins). In order to establish a simple and scaleable transient protein production system, we have used a cationic lipid-based transfection reagent-FreeStyle MAX to study transient transfection in serum-free suspension human embryonic kidney (HEK) 293 and Chinese hamster ovary (CHO) cells. We used quantification of green fluorescent protein (GFP) to monitor transfection efficiency and expression of a cloned human IgG antibody to monitor r-protein production. Parameters including transfection reagent concentration, DNA concentration, the time of complex formation, and the cell density at the time of transfection were analyzed and optimized. About 70% GFP-positive cells and 50-80 mg/l of secreted IgG antibody were obtained in both HEK-293 and CHO cells under optimal conditions. Scale-up of the transfection system to 1 l resulted in similar transfection efficiency and protein production. In addition, we evaluated production of therapeutic proteins such as human erythropoietin and human blood coagulation factor IX in both HEK-293 and CHO cells. Our results showed that the higher quantity of protein production was obtained by using optimal transient transfection conditions in serum-free adapted suspension mammalian cells.

Indexed as

AnimalsCell CountCell SurvivalCHO CellsCricetinaeCricetulusCulture Media, Serum-FreeErythropoietinFactor IXGene ExpressionGenes, ReporterGenetic VectorsGreen Fluorescent ProteinsHumansImmunoglobulin GIndicators and ReagentsCulture Media, Serum-FreeErythropoietinFactor IXGreen Fluorescent ProteinsImmunoglobulin GIndicators and ReagentsLiposomesRecombinant Proteins

Identifiers

PMID18327552
OpenAlexW2035930100

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.