Biography
Gina Poe has been working since 1995 on the mechanisms through which sleep serves memory consolidation and restructuring. Dr. Poe is a southern California native who graduated from Stanford University then worked for two post-baccalaureate years at the VA researching Air Force Test Pilots’ brainwave signatures under high-G maneuvers. She then earned her PhD in Basic Sleep in the Neuroscience Interdepartmental Program at UCLA under the guidance of Ronald Harper then moved to the University of Arizona for her postdoctoral studies with Carol Barnes and Bruce McNaughtons looking at graceful degradation of hippocampal function in aged rats as well as hippocampal coding in a 3-D maze navigated in the 1998 space shuttle mission. She brought these multiunit teachings to answer a burning question of whether REM sleep were for remembering or forgetting and found that activity of neurons during REM sleep is consistent both with the consolidation of novel memories and the elimination of already consolidated memories from the hippocampus, readying the associative memory network for new learning the next day. Moving first to Washington State University then to the University of Michigan before joining UCLA in 2016, Poe has over 80 undergraduates, 9 graduate students, and 8 postdoctoral scholars, and has served in university faculty governance as well as led 5 different programs designed to diversify the neuroscience workforce and increase representation of people of the global majority in the STEM fields. At UCLA she continues research and teaching and Directs the COMPASS-Life Sciences and BRI-SURE programs and co-Directs the MARC-U*STAR program. Nationally she has served as course director of the Marine Biological Lab’s SPINES course and co-Directs the Society for Neuroscience’s NSP program which earned the nation’s highest mentoring honor in 2018. These programs have over 1000 PhD level alumni.
Research Interests
The Poe lab investigates the mechanisms by which sleep traits serve learning and memory consolidation. Memories are encoded by the pattern of synaptic connections between neurons. We employ tetrode recording and optogenetic techniques in learning animals to see how neural patterns underlying learning are reactivated during sleep, and how activity during sleep influences the neural memory code. Both strengthening and weakening of synapses is important to the process of sculpting a network when we make new memories and integrate them into old schema. Results from our studies suggest that while synaptic strengthening can be efficiently accomplished during the waking learning process, the synaptic weakening part of memory integration requires conditions unique to sleep. The absence of noradrenaline during sleep spindles and REM sleep as well as the low levels of serotonin during REM sleep allow the brain to integrate new memories and to refresh and renew old synapses so that we are ready to build new associations the next waking period. Memory difficulties involved in post-traumatic stress disorder, Schizophrenia, Alzheimer’s disease and even autism involve abnormalities in the sleep-dependent memory consolidation process that my lab studies. Keywords: Sleep, learning and memory, PTSD, memory consolidation, reconsolidation, REM sleep, sleep spindles, Norepinephrine, LTP, depotentiation, reversal learning, optogenetics, electrophysiology, tetrode recordings, hippocampus, prefrontal cortex.
Education
B.A., Human Biology, Stanford University 1987
Ph.D., Neuroscience, University of California, Los Angeles 1995
Selected Publications
Cao J, Herman AB, West GB, Poe G, Savage VM. Unraveling why we sleep: Quantitative analysis reveals abrupt transition from neural reorganization to repair in early development. Sci Adv 6(38):eaba0398 (11 pages), 2020. doi: 10.1126/sciadv.aba0398.
Guthrie R, Ciliberti D, Mankin E, Poe GR. Recurrent hippocampo-neocortical sleep-state divergence in humans. PNAS 119(44): e2123427119, PM36279474, 2022.
Frazer M, Cabrera Y, Guthrie R, Poe GR. Shining a light on the mechanisms of sleep for memory consolidation. Current Sleep Medicine Rep, 7:221-231, 2021. https://doi.org/10.1007/s40675-021-00204-3.
Cabrera Y, Holloway J, Poe GR (2020) ‘Sleep Changes Across the Female Hormonal Cycle Affecting Memory: Implications for Resilient Adaptation to Traumatic Experiences.’ J Womens Health (Larchmt), 29 (3): 446-451. PMID: 32186966
Swift KM, Keus K, Echeverria CG, Cabrera Y, Jimenez J, Holloway J, Clawson BC, Poe GR () ‘Sex differences within sleep in gonadally-intact rats.’ Sleep, 2019.PMID: 31784755
Swift KM, Gross BA, Frazer MA, Bauer DS, Clark KJD, Vazey EM, Aston-Jones G, Li Y, Pickering AE, Sara SJ, Poe GR (2018) ‘Abnormal Locus Coeruleus Sleep Activity Alters Sleep Signatures of Memory Consolidation and Impairs Place Cell Stability and Spatial Memory.’ Curr Biol, 28 (22): 3599-3609.e4. PMID: 30393040
Zaborszky L, Gombkoto P, Varsanyi P, Poe GR, Role L, Ananth M, Rajebhosale P, Talmage D, Hasselmo M, Dannenberg H, Minces V, Chiba A, “Specific basal forebrain-cortical cholinergic circuits coordinate cognitive operations”, J Neurosci, 38 (44): 9446-9458 (2018).
Lewis P, Knoblich G, Poe GR, “Recasting reality: how memory replay in sleep boosts creative problem solving”, Trends Cogni Sci, 22 (6): 491-503 (2018).
Bjorness TE, Booth V, Poe GR (2018) ‘Hippocampal theta power pressure builds over non-REM sleep and dissipates within REM sleep episodes.’ Arch Ital Biol, 156 (3): 112-126. PMID: 30324607
Poe GR (2017) ‘Sleep Is for Forgetting.’ J Neurosci, 37 (3): 464-473. PMID: 28100731
Javanbakht, A and Poe, GR, “Behavioral neuroscience of circuits involved in arousal regulation”, The Neurobiology of PTSD, Ressler, K and Liberzon, I(Eds.), 130-147 (2016).
Emrick JJ, Gross BA, Riley BT, Poe GR (2016) ‘Different Simultaneous Sleep States in the Hippocampus and Neocortex.’ Sleep, 39 (12): 2201-2209. PMID: 27748240
Vanderheyden WM, George SA, Urpa L, Kehoe M, Liberzon I, Poe GR (2015) ‘Sleep alterations following exposure to stress predict fear-associated memory impairments in a rodent model of PTSD.’ Exp Brain Res, 233 (8): 2335-46. PMID: 26019008.
Watts A, Gritton HJ, Sweigart J, Poe GR (2012) ‘Antidepressant suppression of non-REM sleep spindles and REM sleep impairs hippocampus-dependent learning while augmenting striatum-dependent learning.’ J Neurosci, 32 (39): 13411-20. PMID: 23015432
Booth V, Poe GR (2006) ‘Input source and strength influences overall firing phase of model hippocampal CA1 pyramidal cells during theta: relevance to REM sleep reactivation and memory consolidation.’ Hippocampus, 16 (2): 161-73. PMID: 16411243
Biography
Beate Ritz joined the faculty of the School of Public Health at UCLA in 1995 and is currently Professor and Vice Chair of the Epidemiology Department and holds co-appointments in the Environmental Health department at the UCLA School of Public Health and in Neurology, UCLA School of Medicine; she is a member of the Center for Occupational and Environmental Health (COEH), the Southern California Environmental Health Science Center (SCEHSC), and co-directs the NIEHS-funded UCLA Center for Gene-Environment Studies of Parkinson’s disease.
Dr. Ritz received her MD and a PhD in Medical Sociology from the University of Hamburg Germany in 1983 and 1987; she was a research fellow and resident at the Psychiatric University-Hospital in Hamburg from 1987-1989, and received doctoral training and a PhD degree in Epidemiology in 1995 from UCLA.
Her research focuses on the health effects of occupational and environmental toxins such as pesticides, ionizing radiation, and air pollution on chronic diseases including neurodegenerative disorders (Parkinson’s disease), cancers, and adverse birth outcomes and asthma. She previously investigated the causes of cancer in chemical toxin and radiation exposed workers and assessed the impact of ergonomic work-place factors on musculo-skeletal disorders. For the past decade, she studied the effects of air pollution on adverse birth outcomes as well as asthma in children in Southern California. In 2006, she received the Robert M Zweig Memorial award for outstanding achievement in air quality and medicine from the South Coast Air Quality Management District. She also spend the past 15 years investigating the long-term effects of pesticide exposures on Parkinson’s disease and cancers and is currently conducting a project to implement a Parkinson’s disease registry required by a new law in California.
In her research she uses geographic information system (GIS) modeling of environmental exposures including pesticide use and traffic related air pollution in California and investigates links between genetic susceptibility factors and environmental exposures in populations. She is directing and collaborating in a large number of federally (NIH, DOD), state (California Air Resources Board), and foundation (Michael J Fox Foundation) funded research projects.
Publications
A selected list of publications:
Biography
The Portera-Cailliau laboratory investigates how developmental defects in network connectivity at the level of the cerebral cortex directly lead to symptoms of autism, learning disability and intellectual dysfunction. In particular they are studying sensory hypersensitivity in a model of fragile X syndrome, by combining in vivo two-photon calcium imaging, patch-clamp electrophysiology, and head-fixed behavior. Dr. Portera-Cailliau was born and raised in Madrid, Spain. He obtained a B.A. in Biochemistry & Cell Biology from U.C. San Diego in 1990. He then attended the Johns Hopkins School of Medicine and obtained an MD-PhD degree in 1997. His mentors were Drs. Donald Price and Lee Martin. After finishing a residency in Neurology at The Massachusetts General Hospital and Brigham & Women’s Hospital in Boston in 2001, Dr. Portera-Cailliau moved to Columbia University for a post-doctoral fellowship in Dr. Rafael Yuste’s laboratory. His second post-doc was with Dr. Karel Svoboda in Cold Spring Harbor Laboratory. He joined the UCLA faculty in November 2004 and has joint appointments in the Departments of Neurology and Neurobiology. He is a member of UCLA’s Brain Research Institute, the Integrated Center for Learning & Memory, and the Neuroscience Theme. Since 2013 he has served as co-director of the UCLA-Caltech Medical Scientist Training Program.