TY  - JOUR
A1  - Hassouna, I.
A1  - Ott, C.
A1  - Wüstefeld, L.
A1  - Offen, N.
A1  - Neher, R. A.
A1  - Mitkovski, M.
A1  - Winkler, D.
A1  - Sperling, S.
A1  - Fries, L.
A1  - Goebbels, S.
A1  - Vreja, I. C.
A1  - Hagemeyer, N.
A1  - Dittrich, M.
A1  - Rossetti, M. F.
A1  - Kröhnert, K.
A1  - Hannke, K.
A1  - Boretius, S.
A1  - Zeug, A.
A1  - Höschen, C.
A1  - Dandekar, T.
A1  - Dere, E.
A1  - Neher, E.
A1  - Rizzoli, S. O.
A1  - Nave, K.-A.
A1  - Sirén, A.-L.
A1  - Ehrenreich, H.
T1  - Revisiting adult neurogenesis and the role of erythropoietin for neuronal and oligodendroglial differentiation in the hippocampus
JF  - Molecular Psychiatry
N2  - Recombinant human erythropoietin (EPO) improves cognitive performance in neuropsychiatric diseases ranging from schizophrenia and multiple sclerosis to major depression and bipolar disease. This consistent EPO effect on cognition is independent of its role in hematopoiesis. The cellular mechanisms of action in brain, however, have remained unclear. Here we studied healthy young mice and observed that 3-week EPO administration was associated with an increased number of pyramidal neurons and oligodendrocytes in the hippocampus of similar to 20%. Under constant cognitive challenge, neuron numbers remained elevated until >6 months of age. Surprisingly, this increase occurred in absence of altered cell proliferation or apoptosis. After feeding a \(^{15}\)N-leucine diet, we used nanoscopic secondary ion mass spectrometry, and found that in EPO-treated mice, an equivalent number of neurons was defined by elevated \(^{15}\)N-leucine incorporation. In EPO-treated NG2-Cre-ERT2 mice, we confirmed enhanced differentiation of preexisting oligodendrocyte precursors in the absence of elevated DNA synthesis. A corresponding analysis of the neuronal lineage awaits the identification of suitable neuronal markers. In cultured neurospheres, EPO reduced Sox9 and stimulated miR124, associated with advanced neuronal differentiation. We are discussing a resulting working model in which EPO drives the differentiation of non-dividing precursors in both (NG2+) oligodendroglial and neuronal lineages. As endogenous EPO expression is induced by brain injury, such a mechanism of adult neurogenesis may be relevant for central nervous system regeneration.
KW  - neural stem-cells
KW  - recombinat-human-erythropoietin
KW  - cognitive functions
KW  - pyramidal neurons
KW  - nervous-sytem
KW  - brain-injury
KW  - mouse-brain
KW  - progenitors
KW  - mice
KW  - memory
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-186669
VL  - 21
IS  - 12
ER  - 
TY  - JOUR
A1  - Iyengar, Sudha K.
A1  - Sedor, John R.
A1  - Freedman, Barry I.
A1  - Kao, W. H. Linda
A1  - Kretzler, Matthias
A1  - Keller, Benjamin J.
A1  - Abboud, Hanna E.
A1  - Adler, Sharon G.
A1  - Best, Lyle G.
A1  - Bowden, Donald W.
A1  - Burlock, Allison
A1  - Chen, Yii-Der Ida
A1  - Cole, Shelley A.
A1  - Comeau, Mary E.
A1  - Curtis, Jeffrey M.
A1  - Divers, Jasmin
A1  - Drechsler, Christiane
A1  - Duggirala, Ravi
A1  - Elston, Robert C.
A1  - Guo, Xiuqing
A1  - Huang, Huateng
A1  - Hoffmann, Michael Marcus
A1  - Howard, Barbara V.
A1  - Ipp, Eli
A1  - Kimmel, Paul L.
A1  - Klag, Michael J.
A1  - Knowler, William C.
A1  - Kohn, Orly F.
A1  - Leak, Tennille S.
A1  - Leehey, David J.
A1  - Li, Man
A1  - Malhotra, Alka
A1  - März, Winfried
A1  - Nair, Viji
A1  - Nelson, Robert G.
A1  - Nicholas, Susanne B.
A1  - O’Brien, Stephen J.
A1  - Pahl, Madeleine V.
A1  - Parekh, Rulan S.
A1  - Pezzolesi, Marcus G.
A1  - Rasooly, Rebekah S.
A1  - Rotimi, Charles N.
A1  - Rotter, Jerome I.
A1  - Schelling, Jeffrey R.
A1  - Seldin, Michael F.
A1  - Shah, Vallabh O.
A1  - Smiles, Adam M.
A1  - Smith, Michael W.
A1  - Taylor, Kent D.
A1  - Thameem, Farook
A1  - Thornley-Brown, Denyse P.
A1  - Truitt, Barbara J.
A1  - Wanner, Christoph
A1  - Weil, E. Jennifer
A1  - Winkler, Cheryl A.
A1  - Zager, Philip G.
A1  - Igo, Jr, Robert P.
A1  - Hanson, Robert L.
A1  - Langefeld, Carl D.
T1  - Genome-wide association and trans-ethnic meta-analysis for advanced diabetic kidney disease: Family Investigation of Nephropathy and Diabetes (FIND)
JF  - PLoS Genetics
N2  - Diabetic kidney disease (DKD) is the most common etiology of chronic kidney disease (CKD) in the industrialized world and accounts for much of the excess mortality in patients with diabetes mellitus. Approximately 45% of U.S. patients with incident end-stage kidney disease (ESKD) have DKD. Independent of glycemic control, DKD aggregates in families and has higher incidence rates in African, Mexican, and American Indian ancestral groups relative to European populations. The Family Investigation of Nephropathy and Diabetes (FIND) performed a genome-wide association study (GWAS) contrasting 6,197 unrelated individuals with advanced DKD with healthy and diabetic individuals lacking nephropathy of European American, African American, Mexican American, or American Indian ancestry. A large-scale replication and trans-ethnic meta-analysis included 7,539 additional European American, African American and American Indian DKD cases and non-nephropathy controls. Within ethnic group meta-analysis of discovery GWAS and replication set results identified genome-wide significant evidence for association between DKD and rs12523822 on chromosome 6q25.2 in American Indians (P = 5.74x10\(^{−9}\)). The strongest signal of association in the trans-ethnic meta-analysis was with a SNP in strong linkage disequilibrium with rs12523822 (rs955333; P = 1.31x10\(^{−8}\)), with directionally consistent results across ethnic groups. These 6q25.2 SNPs are located between the SCAF8 and CNKSR3 genes, a region with DKD relevant changes in gene expression and an eQTL with IPCEF1, a gene co-translated with CNKSR3. Several other SNPs demonstrated suggestive evidence of association with DKD, within and across populations. These data identify a novel DKD susceptibility locus with consistent directions of effect across diverse ancestral groups and provide insight into the genetic architecture of DKD.
KW  - diabetic kidney disease
KW  - genome-wide association study
KW  - Family Investigation of Nephropathy and Diabetes
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-180545
VL  - 11
IS  - 8
ER  - 
TY  - JOUR
A1  - Winkler, Karol
A1  - Fischer, Julian
A1  - Schade, Anne
A1  - Amthor, Matthias
A1  - Dall, Robert
A1  - Geßler, Jonas
A1  - Emmerling, Monika
A1  - Ostrovskaya, Elena A.
A1  - Kamp, Martin
A1  - Schneider, Christian
A1  - Höfling, Sven
T1  - A polariton condensate in a photonic crystal potential landscape
JF  - New Journal of Physics
N2  - The possibility of investigating macroscopic coherent quantum states in polariton condensates and of engineering polariton landscapes in semiconductors has triggered interest in using polaritonic systems to simulate complex many-body phenomena. However, advanced experiments require superior trapping techniques that allow for the engineering of periodic and arbitrary potentials with strong on-site localization, clean condensate formation, and nearest-neighbor coupling. Here we establish a technology that meets these demands and enables strong, potentially tunable trapping without affecting the favorable polariton characteristics. The traps are based on a locally elongated microcavity which can be formed by standard lithography. We observe polariton condensation with non-resonant pumping in single traps and photonic crystal square lattice arrays. In the latter structures, we observe pronounced energy bands, complete band gaps, and spontaneous condensation at the M-point of the Brillouin zone.
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-125050
VL  - 17
ER  - 
TY  - JOUR
A1  - Reymus, M.
A1  - Stawarczyk, B.
A1  - Winkler, A.
A1  - Ludwig, J.
A1  - Kess, S.
A1  - Krastl, G.
A1  - Krug, R.
T1  - A critical evaluation of the material properties and clinical suitability of in‐house printed and commercial tooth replicas for endodontic training
JF  - International Endodontic Journal
N2  - Aim
To assess the suitability of several 3D‐printed resins for the manufacturing of tooth replicas for endodontic training in comparison with commercially available replicas by analysing the properties of the materials and comparing them with real teeth during endodontic training.

Methodology
Tooth replicas were 3D‐printed using four resins (NextDent Model, NextDent C&B, V‐Print ee and Vero White Plus) and compared with two commercially available products (VDW and Smile Factory) as well as extracted human teeth. Martens hardness, indentation modulus and radiopacity were investigated on these tooth replicas. Experienced dentists evaluated the suitability of the replicas for endodontic training by comparing them with real teeth in terms of appearance, anatomy, radiopacity, similarity to dentine during access opening, canal gauging and canal instrumentation. Data were analysed using the Kolmogorov–Smirnov and Mann–Whitney U‐test.

Results
The greatest hardness values were recorded for human dentine (P < 0.001), followed by V‐Print ee and the commercial tooth replica of Smile Factory. The greatest radiopacity was associated with VOC and dentine (P < 0.001) in comparison with the other materials tested. The appearance of the in‐house printed tooth replicas was subjectively evaluated by the dentists as being more realistic than the commercially available products. No differences between the replicas was detected during mechanical instrumentation of root canals.

Conclusion
None of the tooth replicas were able to simulate human dentine from the perspectives evaluated. V‐Print ee had radiopacity comparable with dentine, but its hardness was not comparable with dentine.
KW  - 3D Printing
KW  - dental education
KW  - replica
KW  - undergraduate training
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-218085
VL  - 53
IS  - 10
SP  - 1446
EP  - 1454
ER  -