Professor
Molecular Neurobiology Laboratory
Jesse and Caryl Philips Foundation Chair
Cowen, M.H., Haskell, D., Zoga, K., Reddy, K.C., Chalasani, S.H., Hart, M.P. Conserved autism-associated genes tune social feeding behavior in C. elegans. (2024) Nature Communications. 15(1):9301. DOI: 10.1038/s41467-024-53590-x
Mackie, M., Le, V.V., Carstensen, H.R., Kushnir, N.R., Castro, D.L., Dimov, I.M., Quach, K.T., Cook, S.J., Hobert, O., Chalasani, S.H., Hong, R.L. Evolution of lateralized gustation in nematodes. (2024) bioRxiv. DOI: 10.1101/2024.08.31.610597
Muirhead, C.S., Reddy, K.C., Guerra, S., Rieger, M., Hart, M.P., Srinivasan, J., Chalasani, S.H. Neurexin drives Caenorhabditis elegans avoidance behavior independently of its post-synaptic binding partner neuroligin. (2024) G3. 14(8). DOI: 10.1093/g3journal/jkae111
Haghani, N.B., Lampe, R.H., Samuel, B.S., Chalasani, S.H., Matty, M.A. Identification and characterization of a skin microbiome on suggests environmental microbes confer cuticle protection. (2024) Microbiol Spectr.:e0016924 DOI: 10.1128/spectrum.00169-24
Haley, J.A., Chalasani, S.H. C. elegans foraging as a model for understanding the neuronal basis of decision-making. (2024) Cellular and Molecular Life Sciences. 81(1):252. DOI: 10.1007/s00018-024-05223-1
Cowen, M.H., Reddy, K.C., Chalasani, S.H., Hart, M.P. Conserved autism-associated genes tune social feeding behavior in . (2023) bioRxiv. DOI: 10.1101/2023.12.05.570116
Pribadi, A., Rieger, M.A., Rosales, K., Reddy, K.C., Chalasani, S.H. Dopamine signaling regulates predator-driven changes in egg laying behavior. (2023) Elife. 12. DOI: 10.7554/eLife.83957
Procko, C., Wong, W.M., Patel, J., Mousavi, S.A.R., Dabi, T., Duque, M., Baird, L., Chalasani, S.H., Chory, J. Mutational analysis of mechanosensitive ion channels in the carnivorous Venus flytrap plant. (2023) Current Biology. DOI: 10.1016/j.cub.2023.06.048
Magaram, U., Weiss, C., Vasan, A., Reddy, K.C., Friend, J., Chalasani, S.H. Two pathways are required for ultrasound-evoked behavioral changes in Caenorhabditis elegans. (2022) PLOS One. 17(5):e0267698. DOI: 10.1371/journal.pone.0267698
Matty, M.A., Lau, H.E., Haley, J.A., Singh, A., Chakraborty, A., Kono, K., Reddy, K.C., Hansen, M., Chalasani, S.H. Intestine-to-neuronal signaling alters risk-taking behaviors in food-deprived Caenorhabditis elegans. (2022) PLOS Genetics. 18(5):e1010178. DOI: 10.1371/journal.pgen.1010178
Mei, J., Vasan, A., Magaram, U., Takemura, K., Chalasani, S.H., Friend, J. Well-free agglomeration and on-demand three-dimensional cell cluster formation using guided surface acoustic waves through a couplant layer. (2022) Biomed Microdevices. 24(2):18. DOI: 10.1007/s10544-022-00617-z
Vasan, A., Allein, F., Duque, M., Magaram, U., Boechler, N., Chalasani, S.H., Friend, J. Microscale concert hall acoustics to produce uniform ultrasound stimulation for targeted sonogenetics in hsTRPA1-transfected cells. (2022) Adv Nanobiomed Res. 2(5). DOI: 10.1002/anbr.202100135
Quach, K.T., Chalasani, S.H. Flexible reprogramming of Pristionchus pacificus motivation for attacking Caenorhabditis elegans in predator-prey competition. (2022) Current Biology. DOI: 10.1016/j.cub.2022.02.033
Duque, M., Lee-Kubli, C.A., Tufail, Y., Magaram, U., Patel, J., Chakraborty, A., Mendoza Lopez, J., Edsinger, E., Vasan, A., Shiao, Weiss, C., Friends, J., Chalasani, S.H. Sonogenetic control of mammalian cells using exogenous Transient Receptor Potential A1 channels (2022) Nature Communications. 13. DOI: https://doi.org/10.1038/s41467-022-28205-y
Vasan, A., Orosco, J., Magaram, U., Duque, M., Weiss, C., Tufail, Y., Chalasani, S.H., Friend, J. Ultrasound Mediated Cellular Deflection Results in Cellular Depolarization. (2021) Advanced Science .:e2101950 DOI: 10.1002/advs.202101950
How, J.J., Navlakha, S., Chalasani, S.H. Neural network features distinguish chemosensory stimuli in Caenorhabditis elegans. (2021) PLOS Computational Biology. 17(11):e1009591. DOI: 10.1371/journal.pcbi.1009591
Prakash, D., Ms, A., Radhika, B., Venkatesan, R., Chalasani, S.H., Singh, V. 1-Undecene from Pseudomonas aeruginosa is an olfactory signal for flight-or-fight response in Caenorhabditis elegans. (2021) EMBO Journal.:e106938 DOI: 10.15252/embj.2020106938
Quach, K.T., Chalasani, S.H. Intraguild predation between and : a complex interaction with the potential for aggressive behaviour. (2020) Journal of Neurogenetics.:1-16 DOI: 10.1080/01677063.2020.1833004
Matty, M.A., Chalasani, S.H. Microbial Mind Control. (2020) Cell Host & Microbe. 28(2):147-149. DOI: 10.1016/j.chom.2020.07.016
Liu, Z., Kariya, M.J., Chute, C.D., Pribadi, A.K., Leinwand, S.G., Tong, A., Curran, K.P., Bose, N., Schroeder, F.C., Srinivasan, J., Chalasani, S.H. Predator-secreted sulfolipids induce defensive responses in C. elegans. (2018) Nature Communications. 9(1):1128. DOI: 10.1038/s41467-018-03333-6
Hale, L.A., Lee, E.S., Pantazis, A.K., Chronis, N., Chalasani, S.H. Altered Sensory Code Drives Juvenile-to-Adult Behavioral Maturation in Caenorhabditis elegans. (2017) eNeuro. 3(6). DOI: 10.1523/ENEURO.0175-16.2016
Leinwand, S.G., Yang, C.J., Bazopoulou, D., Chronis, N., Srinivasan, J., Chalasani, S.H. Circuit mechanisms encoding odors and driving aging-associated behavioral declines in Caenorhabditis elegans. (2015) Elife. 4:e10181. DOI: 10.7554/eLife.10181
Ibsen, S., Tong, A., Schutt, C., Esener, S., Chalasani, S.H. Sonogenetics is a non-invasive approach to activating neurons in Caenorhabditis elegans. (2015) Nature Communications. 6:8264. DOI: 10.1038/ncomms9264
Calhoun, A.J., Tong, A., Pokala, N., Fitzpatrick, J.A., Sharpee, T.O., Chalasani, S.H. Neural Mechanisms for Evaluating Environmental Variability in Caenorhabditis elegans. (2015) Neuron. 86(2):428-41. DOI: 10.1016/j.neuron.2015.03.026
Erickstad, M., Hale, L.A., Chalasani, S.H., Groisman, A. A microfluidic system for studying the behavior of zebrafish larvae under acute hypoxia. (2015) Lab on a Chip. 15(3):857-66. DOI: 10.1039/c4lc00717d
Calhoun, A.J., Chalasani, S.H., Sharpee, T.O. Maximally informative foraging by Caenorhabditis elegans. (2014) Elife. 3. DOI: 10.7554/eLife.04220
Lau, H.E., Chalasani, S.H. Divergent and convergent roles for insulin-like peptides in the worm, fly and mammalian nervous systems. (2014) Invertebrate Neuroscience. 14(2):71-8. DOI: 10.1007/s10158-013-0166-9
Sharpee, T.O., Calhoun, A.J., Chalasani, S.H. Information theory of adaptation in neurons, behavior, and mood. (2014) Current Opinion in Neurobiology. 25:47-53. DOI: 10.1016/j.conb.2013.11.007
Leinwand, S.G., Chalasani, S.H. From genes to circuits and behaviors: Neuropeptides expand the coding potential of the nervous system. (2014) Worm. 3:e27730. DOI: 10.4161/worm.27730
Joens, M.S., Huynh, C., Kasuboski, J.M., Ferranti, D., Sigal, Y.J., Zeitvogel, F., Obst, M., Burkhardt, C.J., Curran, K.P., Chalasani, S.H., Stern, L.A., Goetze, B., Fitzpatrick, J.A. Helium Ion Microscopy (HIM) for the imaging of biological samples at sub-nanometer resolution. (2013) Scientific Reports. 3:3514. DOI: 10.1038/srep03514
Leinwand, S.G., Chalasani, S.H. Neuropeptide signaling remodels chemosensory circuit composition in Caenorhabditis elegans. (2013) Nature Neuroscience. 16(10):1461-7. DOI: 10.1038/nn.3511
Curran, K.P., Chalasani, S.H. Serotonin circuits and anxiety: what can invertebrates teach us? (2012) Invertebrate Neuroscience. 12(2):81-92. DOI: 10.1007/s10158-012-0140-y
Leinwand, S.G., Chalasani, S.H. Olfactory networks: from sensation to perception. (2011) Current Opinion in Genetics & Development. 21(6):806-11. DOI: 10.1016/j.gde.2011.07.006
Chalasani, S.H., Kato, S., Albrecht, D.R., Nakagawa, T., Abbott, L.F., Bargmann, C.I. Neuropeptide feedback modifies odor-evoked dynamics in Caenorhabditis elegans olfactory neurons. (2010) Nature Neuroscience. 13(5):615-21. DOI: 10.1038/nn.2526
Tian, L., Hires, S.A., Mao, T., Huber, D., Chiappe, M.E., Chalasani, S.H., Petreanu, L., Akerboom, J., McKinney, S.A., Schreiter, E.R., Bargmann, C.I., Jayaraman, V., Svoboda, K., Looger, L.L. Imaging neural activity in worms, flies and mice with improved GCaMP calcium indicators. (2009) Nature Methods. 6(12):875-81. DOI: 10.1038/nmeth.1398
Macosko, E.Z., Pokala, N., Feinberg, E.H., Chalasani, S.H., Butcher, R.A., Clardy, J., Bargmann, C.I. A hub-and-spoke circuit drives pheromone attraction and social behaviour in C. elegans. (2009) Nature. 458(7242):1171-5. DOI: 10.1038/nature07886
Tsunozaki, M., Chalasani, S.H., Bargmann, C.I. A behavioral switch: cGMP and PKC signaling in olfactory neurons reverses odor preference in C. elegans. (2008) Neuron. 59(6):959-71. DOI: 10.1016/j.neuron.2008.07.038
Chalasani, S.H., Chronis, N., Tsunozaki, M., Gray, J.M., Ramot, D., Goodman, M.B., Bargmann, C.I. Dissecting a circuit for olfactory behaviour in Caenorhabditis elegans. (2007) Nature. 450(7166):63-70. DOI: 10.1038/nature06292
Chalasani, S.H., Feinberg, E.H., Hilliard, M.A. Global 'worming'. (2007) Genome Biology. 8(9):314. DOI: 10.1186/gb-2007-8-9-314
Chalasani, S.H., Sabol, A., Xu, H., Gyda, M.A., Rasband, K., Granato, M., Chien, C.B., Raper, J.A. Stromal cell-derived factor-1 antagonizes slit/robo signaling in vivo. (2007) Journal of Neuroscience. 27(5):973-80. DOI: 10.1523/JNEUROSCI.4132-06.2007
Kreibich, T.A., Chalasani, S.H., Raper, J.A. The neurotransmitter glutamate reduces axonal responsiveness to multiple repellents through the activation of metabotropic glutamate receptor 1. (2004) Journal of Neuroscience. 24(32):7085-95. DOI: 10.1523/JNEUROSCI.0349-04.2004
Vatamaniuk, O.K., Mari, S., Lang, A., Chalasani, S., Demkiv, L.O., Rea, P.A. Phytochelatin synthase, a dipeptidyltransferase that undergoes multisite acylation with gamma-glutamylcysteine during catalysis: stoichiometric and site-directed mutagenic analysis of arabidopsis thal (2004) Journal of Biological Chemistry. 279(21):22449-60. DOI: 10.1074/jbc.M313142200
Chalasani, S.H., Baribaud, F., Coughlan, C.M., Sunshine, M.J., Lee, V.M., Doms, R.W., Littman, D.R., Raper, J.A. The chemokine stromal cell-derived factor-1 promotes the survival of embryonic retinal ganglion cells. (2003) Journal of Neuroscience. 23(11):4601-12. DOI: https://doi.org/10.1523/JNEUROSCI.23-11-04601.2003
Chalasani, S.H., Sabelko, K.A., Sunshine, M.J., Littman, D.R., Raper, J.A. A chemokine, SDF-1, reduces the effectiveness of multiple axonal repellents and is required for normal axon pathfinding. (2003) Journal of Neuroscience. 23(4):1360-71. DOI: https://doi.org/10.1523/JNEUROSCI.23-04-01360.2003
Pribadi, A.K., Chalasani, S.H. Fear conditioning in invertebrates. (n.d.) Front Behav Neurosci. 16:1008818. DOI: 10.3389/fnbeh.2022.1008818
Hsiao, J., Deng, L.C., Moroz, L.L., Chalasani, S.H., Edsinger, E. Ocean to Tree: Leveraging Single-Molecule RNA-Seq to Repair Genome Gene Models and Improve Phylogenomic Analysis of Gene and Species Evolution. (n.d.) Methods in Molecular Biology. 2757:461-490. DOI: 10.1007/978-1-0716-3642-8_19
BS, Genetics, Zoology, and Chemistry, Osmania University, India
ADV DIP, Computer Science, National Institute of Information Technology
PhD, Biology, University of Pennsylvania
Postdoctoral Fellow, Rockefeller University (lab moved from UCSF)