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Karin Dedek

Short CV

2010 Habilitation in Neurobiology
Since 2009 Senior Researcher (permanent position) at the University of Oldenburg
2003-2009 Postdoctoral Fellow with Reto Weiler at the University of Oldenburg
2003 Dissertation in Zoology, University of Oldenburg
1999-2002 Doctoral thesis in the lab of Thomas Jentsch, ZMNH, University of Hamburg
1999-2002 Postgraduate studies "Molecular Biology"
1992-1998 Graduate studies "Biology"


CV of Karin Dedek [pdf]

Scientifc Interest

My main scientific interest is to analyse retinal signal processing on the cellular, network and behavioural level.  I aim to understand the functional role of electrical synapses  in the retina and to elucidate the role of individual cell types,  e.g., wide-field amacrine cells or horizontal cells.


  • German Neuroscience Society
  • Society for Neuroscience
Karin Dedek
Karin Dedek

Research Group


[more information]


University of Oldenburg

Carl-von-Ossietzky-Str. 9-11D-26129 OldenburgGermany

Phone: +49 (0) 441 798 3425
Fax: +49 (0) 441 798 3423



Selected Publications

  1. Hilgen G, von Maltzahn J, Willecke K, Weiler R, Dedek K (2010)
    Subcellular distribution of connexin45 in OFF bipolar cells of the mouse retina.
    J Comp Neurol (in press).
  2. Pérez de Sevilla Müller L, Dedek K, Janssen-Bienhold U, Meyer A, Kreuzberg MM, Lorenz S, Willecke K, Weiler R (2010)
    Expression and modulation of connexin30.2, a novel gap junction protein in the mammalian retina.
    Vis Neurosci 27(3-4):91-101.
  3. Feigenspan A, Dedek K, Schröer U, Weiler R, Thanos S (2010)
    Expression of voltage-gated sodium channels in growth cones of the regenerating rat retina.
    Invest Ophthalmol Vis Sci 51(3):1789-99.
  4. Dedek K, Breuninger T, Pérez de Sevilla Müller L, Maxeiner S, Willecke K, Euler T, Weiler R (2009)
    A novel type of interplexiform amacrine cells in the mouse retina.
    Eur J Neurosci 30(2):217-28
  5. Janssen-Bienhold U, Trümpler J, Hilgen G, Schultz K, Pérez de Sevilla Müller L, Sonntag S, Dedek K, Dirks P, Willecke K,  Weiler R (2008)
    Connexin57 is expressed in dendro-dendritic and axo-axonal gap junctions of mouse horizontal cells and its distribution is modulated by light.
    J Comp Neurol 513(4):363-74.
  6. Trümpler J, Dedek K, Schubert T, Pérez de Sevilla Müller L, Seeliger M, Humphries P, Biel M, Weiler R (2008)
    Rod and cone contributions to horizontal cell light responses in the mouse retina.
    J Neurosci 28(27):6818-25.
  7. Dedek K, Pandarinath C, Alam NM, Wellershaus K, Schubert T, Willecke K, Prusky GT, Weiler R, Nirenberg S (2008)
    Ganglion cell adaptability: does the coupling of horizontal cells play a role?
    PLoS ONE 3(3):e1714.
  8. Dedek K, Schultz K, Pieper M, Dirks P, Maxeiner S, Willecke K, Weiler R, Janssen-Bienhold U (2006)
    Localization of a heterotypic gap junction composed of connexin36 and connexin45 in the rod pathway of the mouse retina.
    Eur J Neurosci 24(6):1675-86.
  9. Shelley J, Dedek K, Schultz K, Hombach S, Willecke K, Weiler R (2006)
    Horizontal cell receptive fields are reduced in connexin57-deficient mice.
    Eur J Neurosci 23(12):3176-86.
  10. Maxeiner S*, Dedek K*, Janssen-Bienhold U, Ammermuller J, Brune H, Kirsch T, Pieper M, Degen J, Kruger O, Willecke K, Weiler R (2005)
    Deletion of connexin45 in mouse retinal neurons disrupts the rod/cone signaling pathway between AII amacrine and ON cone bipolar cells and leads to impaired visual transmission.
    J Neurosci 25:566-76.
    • Pottek M, Knop GC, Weiler R, Dedek K (2011)
      Electrophysiological Characterization of GFP-Expressing Cell Populations in the Intact Retina.
      J Vis Exp (57). pii: 3457.
    • Knop GC, Feigenspan A, Weiler R, Dedek K (2011)
      Inputs underlying the ON-OFF light responses of type 2 wide-field amacrine cells in TH::GFP mice.
      J Neurosci 31(13):4780-91.

Research Groups