Lucia Baldi Unser

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Publications associées (55)

DNA delivery with hyperbranched polylysine: A comparative study with linear and dendritic polylysine

Florian Maria Wurm, Harm-Anton Klok, David Hacker, Lucia Baldi Unser, Yashas Rajendra, Zuzana Kadlecova

PEI and polylysine are among the most investigated synthetic polymeric carriers for DNA delivery. Apart from their practical use, these 2 classes of polymers are also of interest from a fundamental point of view as they both can be prepared in different ar ...

Elsevier2013

Glycan variability on a recombinant IgG antibody transiently produced in HEK-293E cells

Florian Maria Wurm, Yury Tsybin, Luca Fornelli, Lucia Baldi Unser, Sophie Nallet, Simone Schmitt, Julien Parra

In this study, a recombinant monoclonal IgG antibody was produced by transient gene expression (TGE) in suspension-adapted HEK-293E cells. The objective of the study was to determine the variation in recombinant IgG yield and glycosylation in ten independe ...

Elsevier2012

Comparative Study on the In Vitro Cytotoxicity of Linear, Dendritic, and Hyperbranched Polylysine Analogues

Harm-Anton Klok, Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Zuzana Kadlecova

Lysine-based polycations are widely used as nonviral carriers for gene delivery. This manuscript reports the results of a comparative study on the in vitro cytotoxicity of a library of three structural polylysine variants, namely, linear polylysine (LPL), ...

American Chemical Society2012

A NanoDrop-based method for rapid determination of viability decline in suspension cultures of animal cells

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Mélanie Hubert

We describe a rapid method for monitoring the cell growth and decline phases in suspension cultures of animal cells. During the cell growth phase, ultraviolet (UV)-absorbing components in the medium are consumed, but at later times as cells begin to die, U ...

Elsevier2012

Hyperbranched Polylysine: A Versatile, Biodegradable Transfection Agent for the Production of Recombinant Proteins by Transient Gene Expression and the Transfection of Primary Cells

Harm-Anton Klok, Florian Maria Wurm, Lucia Baldi Unser, David Hacker, Zuzana Kadlecova, Yashas Rajendra

The feasibility of a new transfection agent, HBPL, for the production of recombinant IgG antibody via TGE as well as for the transfection of primary cells is studied. Under the conditions investigated, transfection of CHO-DG44 cells using HBPL results in I ...

2012

Role of non-specific DNA in reducing coding DNA requirement for transient gene expression with CHO and HEK-293E cells

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Yashas Rajendra, Divor Kiseljak, Sagar Shashidhar Manoli

Transient gene expression (TGE) is a rapid method for the production of recombinant proteins in mammalian cells. While the TGE volumetric productivity has improved significantly over the past decade, the amount of plasmid DNA (pDNA) needed for transfection ...

2012

k(L)a as a predictor for successful probe-independent mammalian cell bioprocesses in orbitally shaken bioreactors

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Stéphanie Tissot

The aim of this study was to gain a better understanding of orbitally shaken bioreactors (OSRs) operated without controllers for pH and dissolved oxygen (DO) concentration. We used cylindrical OSRs with working volumes ranging from 250mL to 200L to determi ...

Elsevier2012

Poly(ethyleneimine)-Mediated Large-Scale Transient Gene Expression: Influence of Molecular Weight, Polydispersity and N-Propionyl Groups

Harm-Anton Klok, Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Zuzana Kadlecova, Sophie Nallet

Three synthesis lots of linear poly(ethyleneimine) (PEI) are compared to a fully hydrolyzed linear PEI (commercially available as PEI Max) regarding structure, polyplex formation with plasmid DNA, and transfection of suspension-adapted HEK-293E cells. PEI ...

Wiley-Blackwell2012

Large-Scale Transfection of Mammalian Cells

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Carine Meerschman

The large-scale transfection of mammalian cells allows moderate (milligram to gram) amounts of recombinant proteins (r-proteins) to be obtained for fundamental or clinical research. In this article, we describe a one-liter transfection using polyethyleneim ...

Humana Press2011

Hydrodynamic stress in orbitally shaken bioreactors

Alfio Quarteroni, Florian Maria Wurm, Mohamed Farhat, David Hacker, Lucia Baldi Unser, Matthieu Dreyer, Marco Discacciati, Stéphanie Tissot, Martino Reclari, Samuel Quinodoz

2011

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Poly(ethyleneimine)-Mediated Large-Scale Transient Gene Expression: Influence of Molecular Weight, Polydispersity and N-Propionyl Groups

Harm-Anton Klok, Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Zuzana Kadlecova, Sophie Nallet

Wiley-Blackwell2012

Hydrodynamic stress in orbitally shaken bioreactors

Alfio Quarteroni, Florian Maria Wurm, Mohamed Farhat, David Hacker, Lucia Baldi Unser, Matthieu Dreyer, Marco Discacciati, Stéphanie Tissot, Martino Reclari, Samuel Quinodoz

2011

Hyperbranched Polylysine: A Versatile, Biodegradable Transfection Agent for the Production of Recombinant Proteins by Transient Gene Expression and the Transfection of Primary Cells

Harm-Anton Klok, Florian Maria Wurm, Lucia Baldi Unser, David Hacker, Zuzana Kadlecova, Yashas Rajendra

2012