Faculty

Debasish Roy

Assistant Professor

Phone :
E-Mail : droy@iisc.ac.in

Web: Roy lab

Research Areas

Interoception, neuronal regulation of energy balance, and neuronal lipid homeostasis


Research Details

Adaptation to changing metabolic demands is essential for survival. Neurons connecting organ systems enable the body to respond to major physiological changes by sensing and relaying information to the brain. We aim to understand how somatosensory and sympathetic neuron networks regulate systemic energy metabolism, using a multidisciplinary approach that integrates imaging, biochemistry, and genetics.

Adipose tissue is a central regulator of systemic metabolism and the body’s primary site for lipid storage. It is distributed across multiple anatomical depots and exhibits remarkable adaptability, responding dynamically to metabolic stress, nutrient excess, injury, and disease. Beyond energy storage, adipose tissue plays diverse roles in endocrine signaling and whole-body metabolic homeostasis. Adipose tissue is extensively innervated by sympathetic and sensory neurons, which provide critical neural input that shapes its function. Our research seeks to understand how peripheral neural circuits regulate adipose tissue remodeling and, in turn, influence systemic energy metabolism in both physiological and pathological states.

Neurons are highly polarized cells whose axons can extend from a few millimeters to over a meter from the cell body. Their ability to remain electrically active, sense environmental and internal stimuli, and transmit information depends on the precise transport of cellular components between the cell body and distant axonal sites. Organelles such as lysosomes play a central role in this process by maintaining cellular quality control and metabolic balance, functions that are closely linked to lipid homeostasis. Our research seeks to define the mechanisms that regulate lysosomal dynamics in sensory neurons and to understand how lipid metabolism supports lysosomal function. Because lysosomal dysfunction is causally linked to neuronal injury and disease, elucidating these mechanisms may provide insight into how metabolic disturbances impair neuronal function.

Publications

Shantaram D., Rima XY., Bradley D., Wright VP., Liu J., Smith AJ., Jalilvand A., Amari A., Roy D., and Hsueh, WA. , (2025), The GLP-1 receptor agonist dulaglutide attenuates hepatic steatosis by inhibiting de novo lipogenesis in a weight-independent manner , Diabetes, PMID: 40663700

Roy, D., Dion, E., Sepeda, J.A., Peng, J., Lingam, S.R., Townsend, K., Sas, A., Sun, W. and Tedeschi, A., (2024), α2δ1-mediated maladaptive sensory plasticity disrupts adipose tissue homeostasis following spinal cord injury , Cell Reports Medicine,PMID: 38663398

James, J., Gideon, D.A.M., Roy, D. and Mandal, A, (2022), Iron-Sulfur Clusters and ROS in Cancer. In Handbook of Oxidative Stress in Cancer: Mechanistic Aspects (pp. 291-306)., Springer Nature Singapore

Meriin, A.B., Zaarur, N., Roy, D. and Kandror, K.V., (2022), Egr1 plays a major role in the transcriptional response of white adipocytes to insulin and environmental cues , Frontiers in Cell and Developmental Biology, PMID: 36246998

Roy, D*., Myers, J.M. and Tedeschi, A*., (2022), . Protocol for assessing ex vivo lipolysis of murine adipose tissue , STAR protocols , PMID: 35779261 *corresponding author.

Mohtar, O., Ozdemir, C., Roy, D., Shantaram, D., Emili, A. and Kandror, K.V, (2019), Egr1 mediates the effect of insulin on leptin transcription in adipocytes , Journal of Biological Chemistry, PMID: 30846562

Roy, D., Farabaugh, K.T., Wu, J., Charrier, A., Smas, C., Hatzoglou, M., Thirumurugan, K. and Buchner, D.A, (2017), Coordinated transcriptional control of adipocyte triglyceride lipase (Atgl) by transcription factors Sp1 and peroxisome proliferator–activated receptor γ (PPARγ) during adipocyte differentiation , Journal of Biological Chemistry, 292(36), pp.14827-14835. PMID: 2872664

Shihabudeen, M.S., Roy, D., James, J. and Thirumurugan, K, (2015), Chenodeoxycholic acid, an endogenous FXR ligand alters adipokines and reverses insulin resistance , Molecular and cellular endocrinology, PMID: 26188168

Roy, D., Kumar, V., James, J., Shihabudeen, M.S., Kulshrestha, S., Goel, V. and Thirumurugan, K, (2015), Evidence that chemical chaperone 4-phenylbutyric acid binds to human serum albumin at fatty acid binding sites , PLoS One , PMID: 26181488

Chattopadhyay, D., James, J., Roy, D., Sen, S., Chatterjee, R. and Thirumurugan, K, (2015), Effect of semolina-jaggery diet on survival and development of Drosophila melanogaster , Fly, PMID: 26252611

James, J., Fiji, N., Roy, D., MG, D.A., Shihabudeen, M.S., Chattopadhyay, D. and Thirumurugan, K, (2015), A rapid method to assess reactive oxygen species in yeast using H 2 DCF-DA , Analytical methods, DOI: https://doi.org/10.1039/C5AY02278A

Roy, D., Kumar, V., Acharya, K.K. and Thirumurugan, K, (2014), Probing the binding of syzygium-derived α-glucosidase inhibitors with N-and C-terminal human maltase glucoamylase by docking and molecular dynamics simulation , Applied biochemistry and biotechnology, PMID: 24046257

Priscilla, D.H., Roy, D*., Suresh, A., Kumar, V. and Thirumurugan, K, (2014), Naringenin inhibits α-glucosidase activity: A promising strategy for the regulation of postprandial hyperglycemia in high-fat diet-fed streptozotocin-induced diabetic rats , Chemico-Biological Interactions, *equal contribution.PMID: 24412302