Harold and Bernice Davis Chair in Aging and Neurodegenerative Disease, and Professor of Biology
Neurogenetics of sensory behaviors
How do animals sense their environment? How do these external cues elicit specific behaviors and developmental programs? How are these responses modified by the animal’s experience and internal state? The lab aims to answer these questions by identifying the genetic, molecular, and neuronal mechanisms that allow us to robustly, yet flexibly, sense and respond to our complex and constantly changing environment. Understanding the regulation of sensory signaling and signal processing is of significant biomedical importance since disruption of these pathways leads to a range of neurological and behavioral disorders.
To address the above issues, we use a multifaceted approach combining genetic, genomic, and molecular tools, high-resolution quantitative behavioral assays, live imaging, and in vivo analyses of neuronal activity. Our experimental organism is C. elegans, but we also work with mammalian primary neurons and cultured cells. We greatly value collaborations and open communication, and seek out collaborative opportunities that allow us to learn from others, and build new scientific connections within and across disciplines.
Ongoing work in the lab can be broadly grouped into two areas.
- C. elegans exhibits remarkably sensitive responses to attractive and aversive chemicals in its environment, as well as to temperature changes. For instance, worms can detect temperature changes of as little as 0.01°C over a >10°C temperature range. These responses are modulated by the animal’s past experience, current context, and satiety state. The ‘Axis of Taxis’ in the lab identifies molecules required for chemo- and thermosensory signal transduction, describes neuronal responses to chemical and thermal cues and how these responses are modulated by experience and internal state, and investigates the sensorimotor transformations that translate these stimuli into specific behavioral programs.
- All sensory signaling molecules in sensory neurons are localized to their cilia, microtubule-based structures that are specialized to concentrate components of signaling cascades, and that represent the site of primary signal transduction. The morphologies of sensory cilia are remarkably complex and diverse. The ‘Cilia Squad’ in the lab investigates how different types of cilia are generated and maintained, how signaling proteins are trafficked and localized to cilia, how unique cilia morphologies dictate sensory responses, and how sensory activity in turn reshapes cilia architecture.
Please see the lab website and our publications for additional details.
- Rictor/TORC2 mediates gut-to-brain signaling in the regulation of phenotypic plasticity in C. elegans. O'Donnell MP, Chao PH, Kammenga JE, Sengupta P. PLoS Genet. 2018 Feb 7;14(2):e1007213. doi: 10.1371/journal.pgen.1007213. eCollection 2018 Feb.
- Centriolar remodeling underlies basal body maturation during ciliogenesis in Caenorhabditis elegans. Nechipurenko IV, Berciu C, Sengupta P, Nicastro D. Elife. 2017 Apr 15;6. pii: e25686. doi: 10.7554/eLife.25686.
- Structural and Functional Recovery of Sensory Cilia in C. elegans IFT Mutants upon Aging. Cornils A, Maurya AK, Tereshko L, Kennedy J, Brear AG, Prahlad V, Blacque OE, Sengupta P. PLoS Genet. 2016 Dec 1;12(12):e1006325. doi: 10.1371/journal.pgen.1006325. eCollection 2016 Dec.
- A Conserved Role for Girdin in Basal Body Positioning and Ciliogenesis. Nechipurenko IV, Olivier-Mason A, Kazatskaya A, Kennedy J, McLachlan IG, Heiman MG, Blacque OE, Sengupta P. Dev Cell. 2016 Sep 12;38(5):493-506. doi: 10.1016/j.devcel.2016.07.013.
- Receptor-type Guanylyl Cyclases Confer Thermosensory Responses in C. elegans. Takeishi A, Yu YV, Hapiak VM, Bell HW, O'Leary T, Sengupta P. Neuron. 2016 Apr 20;90(2):235-44. doi: 10.1016/j.neuron.2016.03.002.
- Feeding state-dependent regulation of developmental plasticity via CaMKI and neuroendocrine signaling. Neal SJ, Takeishi A, O'Donnell MP, Park J, Hong M, Butcher RA, Kim K, Sengupta P. Elife. 2015 Sep 3;4. pii: e10110. doi: 10.7554/eLife.10110. Erratum in: Elife. 2015;4:e11547. PMID: 26335407
- CaMKI-dependent regulation of sensory gene expression mediates experience-dependent plasticity in the operating range of a thermosensory neuron. Yu YV, Bell HW, Glauser D, Van Hooser SD, Goodman MB, Sengupta P. Neuron. 2014 Dec 3;84(5):919-926. doi: 0.1016/j.neuron.2014.10.046. PMID: 25467978
- A high-resolution morphological and ultrastructural map of anterior sensory cilia and glia in Caenorhabditis elegans. Doroquez DB*, Berciu C*, Anderson JR, Sengupta P*, Nicastro D.* Elife. 2014 Mar 25;3:e01948. doi: 10.7554/eLife.01948. PMID: 24668170
- Neuromodulatory state and sex specify alternative behaviors through antagonistic synaptic pathways in C. elegans. Jang H*, Kim K*, Neal SJ, Macosko E, Kim D, Butcher RA, Zeiger DM, Bargmann CI*, Sengupta P.* Neuron. 2012 Aug 23;75(4):585-92. doi: 10.1016/j.neuron.2012.06.034.PMID: 22920251
* - co-corresponding authors