TY  - JOUR
A1  - Janzen, Dieter
A1  - Bakirci, Ezgi
A1  - Wieland, Annalena
A1  - Martin, Corinna
A1  - Dalton, Paul D.
A1  - Villmann, Carmen
T1  - Cortical Neurons form a Functional Neuronal Network in a 3D Printed Reinforced Matrix
JF  - Advanced Healthcare Materials
N2  - Impairments in neuronal circuits underly multiple neurodevelopmental and neurodegenerative disorders. 3D cell culture models enhance the complexity of in vitro systems and provide a microenvironment closer to the native situation than with 2D cultures. Such novel model systems will allow the assessment of neuronal network formation and their dysfunction under disease conditions. Here, mouse cortical neurons are cultured from embryonic day E17 within in a fiber‐reinforced matrix. A soft Matrigel with a shear modulus of 31 ± 5.6 Pa is reinforced with scaffolds created by melt electrowriting, improving its mechanical properties and facilitating the handling. Cortical neurons display enhance cell viability and the neuronal network maturation in 3D, estimated by staining of dendrites and synapses over 21 days in vitro, is faster in 3D compared to 2D cultures. Using functional readouts with electrophysiological recordings, different firing patterns of action potentials are observed, which are absent in the presence of the sodium channel blocker, tetrodotoxin. Voltage‐gated sodium currents display a current–voltage relationship with a maximum peak current at −25 mV. With its high customizability in terms of scaffold reinforcement and soft matrix formulation, this approach represents a new tool to study neuronal networks in 3D under normal and, potentially, disease conditions.
KW  - 3D electrophysiology
KW  - 3D neuronal networks
KW  - cortical neurons
KW  - melt electrowriting
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-215400
VL  - 9
IS  - 9
ER  - 
TY  - JOUR
A1  - Oehler, Beatrice
A1  - Kistner, Katrin
A1  - Martin, Corinna
A1  - Schiller, Jürgen
A1  - Mayer, Rafaela
A1  - Mohammadi, Milad
A1  - Sauer, Reine-Solange
A1  - Filipovic, Milos R.
A1  - Nieto, Francisco R.
A1  - Kloka, Jan
A1  - Pflücke, Diana
A1  - Hill, Kerstin
A1  - Schaefer, Michael
A1  - Malcangio, Marzia
A1  - Reeh, Peter W.
A1  - Brack, Alexander
A1  - Blum, Robert
A1  - Rittner, Heike L.
T1  - Inflammatory pain control by blocking oxidized phospholipid-mediated TRP channel activation
JF  - Scientific Reports
N2  - Phospholipids occurring in cell membranes and lipoproteins are converted into oxidized phospholipids (OxPL) by oxidative stress promoting atherosclerotic plaque formation. Here, OxPL were characterized as novel targets in acute and chronic inflammatory pain. Oxidized 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (OxPAPC) and its derivatives were identified in inflamed tissue by mass spectrometry and binding assays. They elicited calcium influx, hyperalgesia and induced pro-nociceptive peptide release. Genetic, pharmacological and mass spectrometric evidence in vivo as well as in vitro confirmed the role of transient receptor potential channels (TRPA1 and TRPV1) as OxPAPC targets. Treatment with the monoclonal antibody E06 or with apolipoprotein A-I mimetic peptide D-4F, capturing OxPAPC in atherosclerosis, prevented inflammatory hyperalgesia, and in vitro TRPA1 activation. Administration of D-4F or E06 to rats profoundly ameliorated mechanical hyperalgesia and inflammation in collagen-induced arthritis. These data reveal a clinically relevant role for OxPAPC in inflammation offering therapy for acute and chronic inflammatory pain treatment by scavenging OxPAPC.
KW  - chronic pain
KW  - ion channels in the nervous system
KW  - molecular medicine
KW  - pain
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-158536
VL  - 7
IS  - 5447
ER  -