Former Faculty

Narendrakumar Ramanan

Associate Professor (2013-2021)

Phone : +91 80 2293 3532
E-Mail : naren[at]iisc.ac.in

Research Areas

Neuronal And Glial Cell Development


Research Details

The complexity of the mammalian central nervous system (CNS) lies both in the number of different cell types generated during development and in the intricate manner in which they interact to form functional circuits.

We are interested in two broad questions:

(1) What are the molecular mechanisms regulating axonal growth during development and how these mechanisms can be activated to promote axonal regeneration after injury.

My lab is interested in studying the cell intrinsic mechanisms that regulate axon growth during development. Towards this end, we have identified a transcriptional pathway that is critical for developmental axon growth. Using molecular biology and cell biology approaches, we are studying the mechanisms by which genes in this
pathway mediate axon growth. The knowledge gained from these experiments will be used to study whether or how these mechanisms are affected after nerve injury and whether these mechanisms can be reactivated to promote axonal regeneration in the central nervous system.

(2) What are the mechanisms regulating neural stem cells to astrological differentiation in the brain? How do these mechanisms go awry in gliomas, the major tumours in the brain?

We have identified a novel pathway that is critical for astrocyte differentiation and maintenance in the mouse brain. Studies are underway to understand the underlying mechanisms that mediate astrocyte differentiation and development. It is our hope that the genetic pathways identified in our studies can enable us to understand better the biology of gliomas that have their origin in astrocytes.

Publications

Smitha Bhaskar, Jeevan Gowda, Akshay Hegde, Surya Chandra Rao Thumu, Shreetama Banerjee, Helen M Bellchambers, Narendrakumar Ramanan, Paloma Merchan Sala, Kenneth Campbell, Stephanie Ware, Jyothi Prasanna & Anujith Kumar , (2025), Zic3 enables bimodal regulation of tyrosine hydroxylase expression in olfactory bulb and midbrain-derived neurons, Cell Death Discovery , 11-165, 1-16

Surya Chandra Rao Thumu , Monika Jain , Sumitha Soman, Soumen Das , Vijaya Verma , Arnab Nandi , David H Gutmann, Balaji Jayaprakash , Deepak Nair , James P Clement , Swananda Marathe, Narendrakumar Ramanan, (2024), SRF-deficient astrocytes provide neuroprotection in mouse models of excitotoxicity and neurodegeneration, eLife, 23

Soumen Das,Narendrakumar Ramanan, (2023), Region-specific heterogeneity in neuronal nuclear morphology in young, aged and in Alzheimer’s disease mouse brains, Frontiers in Cell and Developmental Biology, 11, 1-12

Sethi P, Virmani G, Gupta K, Thumu SCR, Ramanan N, Marathe S., (2021), Automated morphometric analysis with SMorph software reveals plasticity induced by antidepressant therapy in hippocampal astrocytes, Journal of Cell Science , 134(12), 1-11

Pranay Mandal, Vivek Belapurkar, Deepak Nair, Narendrakumar Ramanan, (2021), Vinculin-mediated axon growth requires interaction with actin but not talin in mouse neocortical neurons, Cellular and Molecular Life Sciences , 1-20

Monika Jain, Soumen Das, Paul P. Y. Lu, Garima Virmani, Sumitha Soman, Surya Chandra Rao Thumu, David H. Gutmann and Narendrakumar Ramanan, (2021), SRF Is Required for Maintenance of Astrocytes in Non-Reactive State in the Mammalian Brain, eNeuro, 0447-19, 1-15

Mandal,P., Belapurkar, V., Nair, D Ramanan, N., (2021), Vinculin-mediated axon growth requires interaction with actin but not talin in mouse neocortical neurons, Cellular and Molecular Life Sciences online, 78, 5807-5826

Shyamala Mani, Saranya Radhakrishnan, Rajit Narayanan Cheramangalam, Shalini Harkar, Samyutha Rajendran, Narendrakumar Ramanan, (2020), Shh-Mediated Increase in β-Catenin Levels Maintains Cerebellar Granule Neuron Progenitors in Proliferation, The Cerebellum, 19, 645-664

Anindo Chatterjee, Kaviya Chinnappa, Narendrakumar Ramanan, Shyamala Mani, (2018), Centrosome Inheritance Does Not Regulate Cell Fate in Granule Neuron Progenitors of the Developing Cerebellum, The Cerebellum, 17, 685-691