ZFIN ID: ZDB-LAB-991015-4
GENOMIC FEATURES ORIGINATING FROM THIS LAB
all 17 genomic features
STATEMENT OF RESEARCH INTERESTS
We use the alarm response as a paradigm to study the neural basis of innate fear.
The alarm response in fish was first noticed in the 1930’s by Karl von Frisch. He observed that injury to one minnow caused a fright reaction in other members of the school. He demonstrated that the skin contained substances, termed Schreckstoff, which act via the olfactory system to trigger a state of fear. The fish change their swimming behavior dramatically - either darting or freezing - in response to this alarm pheromone.
Subsequent experiments by other scientists established that many freshwater fish species have this response. All the classical hallmarks of fear, including physiological changes such as increase in blood cortisol levels, can be triggered by Schreckstoff.
There are a number of projects in the lab aimed at understanding how different levels of fear are generated. As a starting point, we have embarked on purification and identification of Schreckstoff. We have also carried out calcium imaging of the brain to identify neurons involved. A preliminary genetic screen was carried out in Tuebingen, and this has led to the identification of potential mutations affecting the response. In collaboration with S. Parinov and A. Emelyanov, we are using the LexPR enhancer trap system to manipulate neurons that are potentially involved in the response.
In addition to innate fear, we also carry out experiments using learnt fear, using a larval conditioning paradigm. These experiments are being carried out in collaboration with the laboratory of Trevor Penney, who is in the psychology department in NUS.
ZEBRAFISH PUBLICATIONS OF LAB MEMBERS
Krishnan, S., Mathuru, A.S., Kibat, C., Rahman, M., Lupton, C.E., Stewart, J., Claridge-Chang, A., Yen, S.C., Jesuthasan, S. (2014) The Right Dorsal Habenula Limits Attraction to an Odor in Zebrafish. Current biology : CB. 24(11):1167-75
Mathuru, A.S., Kibat, C., Cheong, W.F., Shui, G., Wenk, M.R., Friedrich, R.W., and Jesuthasan, S. (2012) Chondroitin fragments are odorants that trigger fear behavior in fish. Current biology : CB. 22(6):538-544
Kalueff, A.V., Stewart, A.M., Kyzar, E.J., Cachat, J., Gebhardt, M., Landsman, S., Robinson, K., Maximino, C., Herculano, A.M., Jesuthasan, S., Wisenden, B., Bally-Cuif, L., Lange, M., Vernier, P., Norton, W., Tierney, K., Tropepe, V., and Neuhauss, S. (2012) Time to recognize zebrafish ‘affective’ behavior. Behaviour. 149:1019-1036
Lee, A., Mathuru, A.S., Teh, C., Kibat, C., Korzh, V., Penney, T.B., and Jesuthasan, S. (2010) The habenula prevents helpless behavior in larval zebrafish. Current biology : CB. 20(24):2211-2216
Sheng, D., Qu, D., Kwok, K.H., Ng, S.S., Lim, A.Y., Aw, S.S., Lee, C.W., Sung, W.K., Tan, E.K., Lufkin, T., Jesuthasan, S., Sinnakaruppan, M., and Liu, J. (2010) Deletion of the WD40 domain of LRRK2 in Zebrafish causes Parkinsonism-like loss of neurons and locomotive defect. PLoS Genetics. 6(4):e1000914
Hendricks, M., Mathuru, A.S., Wang, H., Silander, O., Kee, M.Z., and Jesuthasan, S. (2008) Disruption of Esrom and Ryk identifies the roof plate boundary as an intermediate target for commissure formation. Molecular and Cellular Neuroscience. 37(2):271-283
Etard, C., Behra, M., Ertzer, R., Fischer, N., Jesuthasan, S., Blader, P., Geisler, R., and Strähle, U. (2005) Mutation in the delta-subunit of the nAChR suppresses the muscle defects caused by lack of Dystrophin. Developmental dynamics : an official publication of the American Association of Anatomists. 234(4):1016-1025
D'Souza, J., Hendricks, M., Le Guyader, S., Subburaju, S., Grunewald, B., Scholich, K., and Jesuthasan, S. (2005) Formation of the retinotectal projection requires Esrom, an ortholog of PAM (protein associated with Myc). Development (Cambridge, England). 132(2):247-256
Wagle, M., Grunewald, B., Subburaju, S., Barzaghi, C., Le Guyader, S., Chan, J., and Jesuthasan, S. (2004) EphrinB2a in the zebrafish retinotectal system. Journal of neurobiology. 59(1):57-65
Strähle, U., Jesuthasan, S., Blader, P., Garcia-Villalba, P., Hatta, K., and Ingham, P.W. (1997) one-eyed pinhead is required for development of the ventral midline of the zebrafish (Danio rerio) neural tube. Genes and function. 1:131-148