Kermen Lab

Our group explores how stress affects behaviors and neuronal circuits’ activity. Our goal is to understand how stress exposure, especially during early life, can later predispose to mental health disorders such as depression and anxiety disorders.

 

Stress predisposes to mental disorders such as anxiety and depression, but the biological mechanisms linking neural alterations to maladaptive behaviors are ill-understood. Our group explores the function of neuronal circuits in physiological and pathological states, with a special focus on circuits implicated in sensory and defensive behaviors. We combine anatomical and functional neurophysiology methods with behavioral assays to better understand how stressor exposure influences neural activity and underlies maladaptive behaviors.

The Kermen lab utilizes the zebrafish, a small and transparent vertebrate model, which holds great potential for translational research in stress-induced mental disorders. Zebrafish share high genetic homology with human. Importantly, the essential functions of the stress neuroendocrine system, the neurotransmitters systems and affective processing circuits are conserved.

We use non-invasive fluorescence microscopy to record brain wide neural activity in vivo, which is reported by change in fluorescence of genetically encoded indicators (e.g. GCaMP6). The small size of the zebrafish brain also enables us to record and manipulate neuronal activity at later developmental stages, in ex vivo whole brain explant preparations (Kermen et al. BMC Biology 2020; Kermen et al. Plos Biology 2020).

We use and adapt assays to measure anxiety-like and sensory-driven behaviors in larval and adult zebrafish (Golla et al. Scientific reports 2020; Kermen et al., BMC Biology 2020). Quantitative analysis of several metrics enables us to precisely characterize behavioral alterations, and how they can be reverted by pharmacological or opto- or chemogenetic manipulations of neuronal activity.

 

Golla A, Østby H, Kermen F. (2020) Chronic unpredictable stress induces anxiety-like behaviors in young zebrafish. Scientific Reports

Kermen F, Darnet L, Wiest C, Palumbo F, Bechert J, Uslu O, Yaksi E. (2020) Stimulus-specific behavioral responses of zebrafish to a large range of odors exhibit individual variability. BMC Biology

Kermen F, Lal P, Faturos NG, Yaksi E. (2020) Interhemispheric connections between olfactory bulbs improve odor detection. PLoS Biology

Kermen F*, Midroit M*, Kuczewski N, Forest J, Sacquet J, Benetollo C, Richard M, Didier A, Mandairon N. (2016) Topographical representation of odour hedonics in the olfactory bulb. Nature Neuroscience

Kermen F*, Franco LM*, Wyatt C, Yaksi E. (2013) Neural circuits mediating olfactory-driven behavior in fish. Frontiers in Neural Circuits.

 

EMPLOYEMENT and EDUCATION

2021 - Associate Professor & Group Leader, Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark
2018 - 2021 Adjunct Associate Professor & Group Leader, Department of Biology, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
2017 - 2018 Researcher, Kavli Institute for Systems Neuroscience (KISN), NTNU, Trondheim, Norway
2015 - 2016 Post-doctoral Researcher, KISN, NTNU, Trondheim, Norway
2012 - 2015 Post-doctoral Researcher, Neuroelectronics Research Flanders, Leuven, Belgium
2008 - 2012 PhD Fellow, Lyon1 University/Center for Neuroscience Research, Lyon, France
2006 - 2008 Master’s degreein Biosciences, Ecole Normale Superieure, Lyon, France

 SCIENTIFIC GRANTS AND AWARDS

2022 - 2023 Brain & Behavior Research Foundation – Young Investigator grant (Project leader)
2022 - 2025 Lundbeckfonden - Ascending Investigator (Project leader)
2019  NTNU equipment funding (Co-applicant; Project Leader Clare Stawski)
2018 - 2020 NTNU Starter package grant (Project leader)
2017 - 2021 NTNU Outstanding Academic Fellow (Career development award)
2017 - 2020  FRIPRO - Young Research Talent grant (Project leader)
2016  ISOT - Young Investigator Award
2013 - 2015 Fyssen Foundation Post-Doctoral Fellowship
2009 - 2012 French Ministry of research Doctoral Fellowship
2005 - 2009 French Civil servant undergraduate scholarship

           

 

  • Zebrafish vertebrate model: Wild-type and transgenic lines
  • Fluorescence microscopy: epifluorescence, confocal, two-photon and light-sheet microscopy
  • Calcium imaging: in vivo (in larvae) and ex vivo (in brain explants) recordings in transgenic zebrafish expressing a genetically encoded calcium indicator
  • Manipulation of neural activity using optogenetics; chemogenetics; electrical and pharmacological stimulations
  • Behavioral assays: anxiety-like behaviors (novel tank, dark-light, and open field tests); social behaviors (shoaling); olfactory, visual and heat-evoked behaviors
  • Neuronal tracing using sparsely labelled transgenic lines and dextran-coupled dye electroporation
  • Immunohistochemistry
  • MATLAB and Python programming for instrumentation control and data analysis

 

# senior corresponding author.
* equal contributions.

(preprint). Andreassen A*, Hall P*, Khatib P, Jutfelt F, Kermen F#. Neural dysfunction at upper thermal limit in the zebrafish. bioRxiv preprint. DOI: 10.1101/2020.12.28.424529 

15. Kermen F#, Mandairon N, Chalençon L. (2021) Odor hedonics coding in the vertebrate olfactory bulb. Cell and Tissue Research, Special Issue on "Olfactory Coding and Circuitries". Cell and Tissue Research.

14. Golla A, Østby H, Kermen F#. (2020) Chronic unpredictable stress induces anxiety-like behaviors in young zebrafish. Scientific Reports. 

13. Kermen F, Darnet L, Wiest C, Palumbo F, Bechert J, Uslu O, Yaksi E. (2020) Stimulus-specific behavioral responses of zebrafish to a large range of odors exhibit individual variability. BMC Biology. 

12. Kermen F, Lal P, Faturos NG, Yaksi E. (2020) Interhemispheric connections between olfactory bulbs improve odor detection. PLoS Biology. 

11. Mandairon N, Kuscewsky N, Kermen F, Forest J, Midroit M, Richard M, Thevenet M, Sacquet J, Linster C, Didier A. (2018) Opposite regulation of inhibition by adult-born granule cells during implicit versus explicit olfactory learning. Elife.

10. Kermen F*, Midroit M*, Kuczewski N, Forest J, Sacquet J, Benetollo C, Richard M, Didier A, Mandairon N. (2016) Topographical representation of odour hedonics in the olfactory bulb. Nature Neuroscience.

9. Vinera J, Kermen F, Sacquet J, Didier A, Mandairon N, Richard M. (2015) Olfactory perceptual learning requires action of noradrenaline in the olfactory bulb: comparison with olfactory associative learning. Learning & Memory.

8. Mandairon N, Kermen F*, Charpentier C*, Sacquet J, Linster C and Didier A. (2014) Context- driven activation of odor representations in the absence of olfactory stimuli in the olfactory bulb and piriform cortex. Frontiers in Behavioral Neuroscience.

7. Kermen F*, Franco LM*, Wyatt C, Yaksi E. (2013) Neural circuits mediating olfactory-driven behavior in fish. Frontiers in Neural Circuits.

6. Kermen F*, and Chakirian A*, Sezille C, Joussain P, Le Goff G, Ziessel A, Chastrette M, Mandairon N, Didier A, Rouby C & Bensafi M. (2011) Molecular complexity determinesthe number of olfactory notes and the pleasantness of smells. Scientific reports.

5. Joussain P, Chakirian A, Kermen F, Rouby C, and Bensafi M. (2011) Physicochemical influence on odor hedonics: Where does it occur first? Communicative & integrative biology.

4. Kermen F, Sultan S, Sacquet J, Mandairon N, and Didier A. (2010) Consolidation of an olfactory memory trace in the olfactory bulb is required for learning-induced survival of adult-born neurons and long-term memory. PLoS One.

3. Sultan S, Mandairon N, Kermen F, Garcia S, Sacquet J, and Didier A. (2010) Learning-dependent neurogenesis in the olfactory bulb determines long-term olfactory memory. The FASEB Journal.

2. Mandairon N, Sultan S, Rey N, Kermen F, Moreno M, Busto G, Farget V, Messaoudi B, Thevenet M, Didier A. (2009) A computer-assisted odorized hole-board for testing olfactory perception in mice. Journal of neuroscience methods.

1. Busto G, Elie J, Kermen F, Garcia S, Sacquet J, Jourdan F, Marcel D, Mandairon N, Didier A. (2009) Expression of Zif268 in the granule cell layer of the adult mouse olfactory bulb is modulated by experience. European Journal of Neuroscience.

 

 

Open positions

We encourage students, interested in joining the group for their Bachelor or Master’s thesis, to enquire about prospective projects (incl. behavioral & physiological measurements in live zebrafish; fluorescence microscopy; neuroanatomical and molecular biology techniques; functional neural data analysis). We welcome diverse relevant educational backgrounds, - e.g.  physics, computational data science, mathematics, medicine, neuroscience, biochemistry, veterinary sciences - provided a keen interest in neurophysiological lab work. 

If you would like to join us, please contact Assoc. Prof. Florence Kermen.

Lab members

Name Title Job responsibilities Image
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Florence Kermen Associate Professor Billede af Florence Kermen
João Henrique Campagnolo Research Assistant Kermen Lab Billede af João Henrique Campagnolo