IISER Pune
INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH (IISER) PUNE
where tomorrow’s science begins today
An Autonomous Institution, Ministry of Human Resource Development, Govt. of India
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Seminars and Colloquia

Biology

Notch downstream target Hes-1 switches roles based on its mode of activation 
 
Thu, Apr 26, 2018,   02:00 PM to 03:00 PM at Seminar Room 34, 2nd Floor, Main Building

Dr. Jackson James
RGCB, Thiruvananthapuram

Notch signaling pathway and its downstream effector Hes-1 are well known for their role in cortical neurogenesis. Despite the canonical activation of Hes-1 in developing neocortex, recent advances have laid considerable emphasis on Notch/CBF1-independent Hes-1 expression with poor understanding of its existence and functional significance. Using reporter systems and in utero electroporation, we could qualitatively unravel the existence of Notch/CBF1-independent Hes-1 expressing neural stem cells from the cohort of dependent progenitors throughout the mouse neocortical development. Though Hes-1 expression is maintained in neural progenitor territory at all times, a simple shift from Notch-independent to dependent state makes it pleiotropic as the former maintains the neural stem cells in a non-dividing/slow dividing state, whereas the latter is very much required for maintenance and proliferation of radial glial cells. Therefore, our results provide an additional complexity in neural progenitor heterogeneity regarding differential Hes-1 expression in the germinal zone during neo-cortical development.

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