Head: Leszek Kaczmarek, Ph.D.
The team: Staff: Dr. Anna Beroun, Lukasz Bijoch (PhD student), Marta Doliwa (PhD student), Dr. Bartosz Frycz, Dr. Adam Gorlewicz, Dr. Tomasz Jaworski, Dr. Katarzyna Kalita-Bykowska, Dominik Kanigowski (PhD student), Danylo Khomiak (PhD student), Joanna Kłos, Klaudia Kogut (PhD student), Agnieszka Kostrzewska-Księżyk, Anna Krysiak (PhD student), Diana Legutko (PhD student), Lena Majchrowicz (PhD student), Dr. Piotr Michaluk, Aleksandra Mielnicka (PhD student), Dr. Shiladitya Mitra, Karolina Nader, Dr. Monika Pawłowska, Martyna Pekała, Dr. Barbara Pijet-Binkiewicz, Dr. Emilia Rejmak-Kozicka, Dr. Paulina Rybak Dr. Marzena Stefaniuk, Bogusia Sudoł-Rutkowska, Dr. Joanna Urban-Ciećko, Zbigniew Zieliński (PhD student)
Our research aim is to understand brain-mind connection. We believe that is is possible to localize specific mind functions into the brain and then reveal their molecular and cellular underpinnings. The window to understand mind is learning and memory that can be successfully studied in experimental animals. At the molecular and cellular levels , synaptic plasticity appears to provide plausible explanation for those phenomena. Over thirty years ago, together with H.J. Matthies and his colleagues from Magdeburg and simultaneously with K.V. Anokhin and his coworkers in Moscow, we have discovered gene expression in the mammalian brain in learning. The first such gene was c-fos, encoding a component of transcription factor AP-1. This led us to identify c-Fos/AP-1 such target genes in activated neurons as TIMP-1 (tissue inhibitor of matrix metalloproteinases) and MMP-9 (matrix metalloproteinase). Over the last dozen years we have shown that MMP-9 is produced and released at the excitatory synapses in response to enhanced neuronal activity to play a paramount role in the synaptic plasticity, learning and memory as well as in neuropsychiatric disorders, including epilepsy, alcohol addiction, schizophrenia and bipolar disorder. Presently, our major research effort is focused on MMP-9 and its fundamental role in controlling morphological and functional plasticity of the excitatory synapses, especially in the central nucleus of the amygdala, which we have implicated as pivotal for the appetitive learning.
de Hoz L., Gierej D., Lioudyno L., Jaworski J., Blazejczyk M., Cruces-Solís H., Beroun A., Lebitko T., Nikolaev T., Knapska E., Nelken I., Kaczmarek L. Blocking c-Fos expression reveals the role of auditory cortex plasticity in sound frequency discrimination learning. Cerebral Cortex, 28: 1645–1655, 2018.
Lepeta K., Purzycka K., Pachulska-Wieczorek K., Mitjans M., Begemann M., Vafadari B., Bijata K., Adamiak R., Ehrenreich H., Dziembowska M., Kaczmarek L., A normal genetic variation modulates synaptic MMP-9 protein levels and the severity of schizophrenia symptoms. EMBO Molecular Medicine, 9: 1100-1116, 2017.
Stefaniuk M., Beroun A., Lebitko T., Markina O., Leski S., Meyza K., Grzywacz A., Samochowiec J., Samochowiec A., Radwanska K., Kaczmarek L. Matrix metalloproteinase-9 and synaptic plasticity in the central amygdala in control of alcohol seeking behavior. Biological Psychiatry, 81: 905–906, 2017.
van der Kooij M. , Fantin M. , Rejmak E., Grosse J., Zanoletti O., Fournier C., Ganguly K., Kalita K., Kaczmarek L., Sandi C. Role for MMP-9 in stress-induced down-regulation of nectin-3 in hippocampal CA1 and associated behavioral alterations. Nature Communications, 5: 4995, 2014.
Knapska E., Macias M., Mikosz M., Nowak A., Owczarek D., Wawrzyniak M., Pieprzyk M., Cymerman I.A., Werka T., Sheng M., Maren S., Jaworski J., Kaczmarek L., Functional anatomy of neural circuits regulating fear and extinction. Proceedings of the National Academy of Sciences USA, 42: 17093-17098, 2012.