AG Chemosensory Systems

Group members


Prof. Dr. med. Dr. h.c. Martin Witt  
M. sc. Nicole Power Guerra

PhD students

Sema Kaya: “The olfactory system in animal models of Multiple Sclerosis”
Lina-Marielle Krysewski:"The VNO in Huntington´s disease"
Julia Schnermann (in co-operation with Prof. Frederike Hanke, Institute for Biosciences, Neuroethology): “Distribution of photoreceptor cells in the retina of harbor seals”

Master student


Former club members

Carlos Junior Hempel: Carlos successfully defended his Master Thesis (“Electron Microscopic phenotype of the Pituitary Gland and Adrenal Gland in a Mouse Model of Niemann Pick Disease Type C1”) with the mark 1.7. Congratulations!!!

Anja Meyer: “Die Plastizität des olfaktorischen Systems in einem Mausmodell von Morbus Niemann-Pick Typ C1” (verteidigt am 15.9.2020; magna cum laude)

Diana Heimes: “Volumetrische Evaluation zentraler olfaktorischer Areale in einem mausbasierten Tiermodell für Morbus Niemann-Pick Typ C1” (verteidigt am 15.9.2020; magna cum laude)

Lorenzo Brozzetti, , Lab member from October 2018-April 2019, in co-operation with PD Dr. Marcus Frank, EMZ, UMR, and Prof. Gianluigi Zanusso,  University of Verona: “Neurodegeneration associated-proteins in human olfactory epithelium: immunocytochemical and biomolecular study in healthy subjects and patients with synucleinopathies”  (defended his PhD thesis successfully at the Univ. of Verona on May 10, 2020)

Irina Jozikova (Master) (in co-operation with Prof. Frederike Hanke, Institute for Biosciences, Neuroethology): “Histological analysis of retina of mammals” (defended her master thesis successfully on May 10, 2020)

Scientific profile

Functional Morphology of Chemosensory Systems

Our group is currently working on the impact of general neurodegeneration on olfactory acuity. We use several animal models that mimic defects occurring in human diseases such as Idiopathic Parkinson´s Syndrome, Huntington´s disease, Multiple Sclerosis or Niemann-Pick disease. Most outcomes are based on immunohistochemical and electron microscopical techniques.

Further interests:

  • Covid-19 and olfaction
  • Distribution pattern of human olfactory epithelium
  • Regenerative potential of the human olfactory system 
  • Human olfactory bulb and central olfactory pathways  
  • Morphology and immunohistochemistry of the human vomeronasal organ
  • Functional morphology of taste buds
  • Histocompatibility of anterior eye chamber stents (glaucoma research)

New Releases

“Full reference list”: here


• Immunohistochemistry
• Electron microscopy


• Marcus Frank, PhD, Electron microscopic center

• Frederike Hanke, PhD, Marine Science Center, Rostock

• Anja Bräuer, PhD, Anatomy, Molecular Neurobiology, Carl von Ossietzky-Universität Oldenburg

• Thomas Hummel, MD, PhD, Dresden University of Technology Medical School

• Jörg Strotmann, PhD; Physiology, University of Hohenheim


Prof. Dr. med. Dr. h. c.  Martin Witt 

Tel.: +49 (0)381 - 494 8409 
Raum: 3.23 
E-Mail: martin.witt{bei}