| Back Education: Course work at George Washington University, Foothill College and University of California, Berkeley. Employment: Professional Honors : Advisory Boards/Academic/Administrative Service Current service: Past Service: Major Research Interest : Membership in Scientific Societies : Current Sponsored Research Support: RO1 MH062517 (Block, principal investigator) 04/01/2001 – 03/30/2009 Neural Basis of Circadian Organization. This grant focuses on the role of calcium in the generation and entrainment of circadian rhythms. There is a subcontract to the Karolinska Institute. 1 P50 MH074924 (Takahashi, PI, Block, Investigator) 9/05 – 09/10 Chemical and Genetic Manipulation of Circadian Systems. Grant supporting NIMH Conte Neuroscience Center. G. Block and M. Menaker share a project to study the effects of methamphetamine and lithium on the SCN and other brain regions. 1 T32 NS44851 (Block, principal investigator) 08/15/2002 - 06/30/2007 Training grant in Temporal Biology (special training grant to increase participation of minority graduate students in the neurosciences). Pending: NSF Emerging Frontiers in Research and Innovation Proposal to construct small neuronal networks in culture as well as the development of solid-state integrated recording devices. A multi-disciplinary group of electrical and chemical engineers and biologists. I will participate as an investigator. Selected prior research support (Two selected from numerous grants from NIH, NASA, Air Force, NSF, others to support my research, postdoctoral trainees, and for disciplinary meetings that I have organized). 1979 – 20032 R01 NS15264 NIH, Neural Basis of Circadian Organization, The goals of this 24-year project were the biophysical analysis of isolated pacemaker neurons from the molluscan retina and study of pacemaker modulation/regulation (Principal Investigator) 1991 – 2002IBN-8920162 NSF, Science and Technology Center in Biological Timing This was an NSF Science and Technology Center that received support for the 11 year limit of this funding source. The NSF Center supported research, education and outreach. (Director and Principal Investigator) Courses Developed : Courses Taught : Select University Committee Service Non-University Related Scientific Activities Inventions: Sonic leveling device (assigned to the Alumni Patents Foundation). Speaking aid for movement restricted patients (assigned to the Alumni Patents Foundation). Two chambered disposable hospital urinal (assigned to Alumni Patents Foundation). Remote slave alarm for battery operated fire and smoke sensors, (assigned to University of Virginia Patent Foundation). AI operator fatigue monitor (assigned to University of Virginia Patent Foundation). Publications (since 1995) 63. Khalsa, S.B., S. Michel, and G.D. Block. 1995. The anesthetic agents pentobarbital and chloralose block phase shifts of a neuronal in vitro circadian pacemaker. Neurosci Lett 187:41-44. 64. Block, G., M. Geusz, S. Khalsa, S. Michel, and D. Whitmore. 1995. Cellular analysis of a molluscan retinal biological clock. Ciba Found Symp 183:51-60; discussion 60-56. 65. Block, G.D., S.B. Khalsa, K. Manivannan, S. Michel, and D. Whitmore. 1995. Unwinding the snail's clock: cellular analysis of a retinal circadian pacemaker. Netherlands Journal of Zoology 44:550-562. 66. Block, G.D. 1995. Circadian Clocks. McGraw Hill, 67. Khalsa, S.B., D. Whitmore, B. Bogart, and G.D. Block. 1996. Evidence for a central role of transcription in the timing mechanism of a circadian clock. Am J Physiol 271:C1646-1651. 68. Block, G.D., M. Geusz, S.B. Khalsa, S. Michel, and D. Whitmore. 1996. Circadian rhythm generation, expression and entrainment in a molluscan model system. Prog Brain Res 111:93-102. 69. Block, G.D. 1996. Studying the snail's clock at better than a snail's pace. Braz J Med Biol Res 29:71-75. 70. Wayne, N.L., T. Nick, and G.D. Block. 1996. Effects of temperature on reproductive neuroendocrine function in Aplysia californica. Gen Comp Endocrinol 102:351-359. 71. Block, G.D. 1996. Cellular aspects of molluskan biochronometry. Cell and Developmental Biology 7:781-789. 72. Geusz, M.E., C. Fletcher, G.D. Block, M. Straume, N.G. Copeland, N.A. Jenkins, S.A. Kay, and R.N. Day. 1997. Long-term monitoring of circadian rhythms in c-fos gene expression from suprachiasmatic nucleus cultures. Curr Biol 7:758-766. 73. Page, T.L., G.T. Wassmer, J. Fletcher, and G.D. Block. 1997. Aftereffects of entrainment on the period of the pacemaker in the eye of the mollusk Bulla gouldiana. J Biol Rhythms 12:218-225. 74. Herzog, E.D., M.E. Geusz, S.B. Khalsa, M. Straume, and G.D. Block. 1997. Circadian rhythms in mouse suprachiasmatic nucleus explants on multimicroelectrode plates. Brain Res 757:285-290. 75. Khalsa, S.B., S. Michel, and G.D. Block. 1997. The role of extracellular sodium in the mechanism of a neuronal in vitro circadian pacemaker. Chronobiol Int 14:1-8. 76. Geusz, M.E., R.G. Foster, W.J. DeGrip, and G.D. Block. 1997. Opsin-like immunoreactivity in the circadian pacemaker neurons and photoreceptors of the eye of the opisthobranch mollusc Bulla gouldiana. Cell Tissue Res 287:203-210. 77. Herzog, E.D., J.S. Takahashi, and G.D. Block. 1998. Clock controls circadian period in isolated suprachiasmatic nucleus neurons. Nat Neurosci 1:708-713. 78. Yamazaki, S., M.C. Kerbeshian, C.G. Hocker, G.D. Block, and M. Menaker. 1998. Rhythmic properties of the hamster suprachiasmatic nucleus in vivo. J Neurosci 18:10709-10723. 79. Block, G.D. 1998. Cellular basis of biological timing. Kangaku 68:144-150. 80. Herzog, E.D., and G.D. Block. 1999. Keeping an eye on retinal clocks. Chronobiol Int 16:229-247. 81. Sloan, M.A., J. Levenson, Q. Tran, M. Kerbeshian, G.D. Block, and A. Eskin. 1999. Aging affects the ocular circadian pacemaker of Aplysia californica. J Biol Rhythms 14:151-159. 82. Michel, S., K. Manivannan, J.J. Zaritsky, and G.D. Block. 1999. A delayed rectifier current is modulated by the circadian pacemaker in Bulla. J Biol Rhythms 14:141-150. 83. Block, G.D., E. Herzog, and M. Kerbeshian. 1999. Chapter 4: Chronobiology. In Neuroendocrinology in Physiology and Medicine. Friedman, editor Humana Press, 391-401. 84. Abe, M., E.D. Herzog, and G.D. Block. 2000. Lithium lengthens the circadian period of individual suprachiasmatic nucleus neurons. Neuroreport 11:3261-3264. 85. Herzog, E.D., M.S. Grace, C. Harrer, J. Williamson, K. Shinohara, and G.D. Block. 2000. The role of Clock in the developmental expression of neuropeptides in the suprachiasmatic nucleus. J Comp Neurol 424:86-98. 86. Yamazaki, S., R. Numano, M. Abe, A. Hida, R. Takahashi, M. Ueda, G.D. Block, Y. Sakaki, M. Menaker, and H. Tei. 2000. Resetting central and peripheral circadian oscillators in transgenic rats. Science 288:682-685. 87. Aujard, F., E.D. Herzog, and G.D. Block. 2001. Circadian rhythms in firing rate of individual suprachiasmatic nucleus neurons from adult and middle-aged mice. Neuroscience 106:255-261. 88. Blumenthal, E., G.D. Block, and A. Eskin. 2001. Cellular and molecular molluscan circadian pacemakers. In Handbook of Behavioral Neurobiology: Circadian Clocks. Plenum, New York. 89. Constance, C.M., C.B. Green, H. Tei, and G.D. Block. 2002. Bulla gouldiana period exhibits unique regulation at the mRNA and protein levels. J Biol Rhythms 17:413-427. 90. Yamazaki, S., M. Straume, H. Tei, Y. Sakaki, M. Menaker, and G.D. Block. 2002. Effects of aging on central and peripheral mammalian clocks. Proc Natl Acad Sci U S A 99:10801-10806. 91. Abe, M., E.D. Herzog, S. Yamazaki, M. Straume, H. Tei, Y. Sakaki, M. Menaker, and G.D. Block. 2002. Circadian rhythms in isolated brain regions. J Neurosci 22:350-356. 92. Wilsbacher, L.D., S. Yamazaki, E.D. Herzog, E.J. Song, L.A. Radcliffe, M. Abe, G. Block, E. Spitznagel, M. Menaker, and J.S. Takahashi. 2002. Photic and circadian expression of luciferase in mPeriod1-luc transgenic mice invivo. Proc Natl Acad Sci U S A 99:489-494. 93. Vansteensel, M.J., S. Yamazaki, H. Albus, T. Deboer, G.D. Block, and J.H. Meijer. 2003. Dissociation between circadian Per1 and neuronal and behavioral rhythms following a shifted environmental cycle. Curr Biol 13:1538-1542. 94. Davidson, A.J., F. Aujard, B. London, M. Menaker, and G.D. Block. 2003. Thermochron ibuttons: an inexpensive method for long-term recording of core body temperature in untethered animals. J Biol Rhythms 18:430-432. 95. Block, G., B. Bogart, C. Collwell, C. Constance, M. Geusz, S. Khalsa, D. McMahon, S. Michel, M. Ralph, M. Roberts, and D. Whitmore. 2003. The molluskan retina as a model for studying circadian physiology. In Circadian Clock as Multi-Oscillator System. K. Honma, and S. Honma, editors. Hokkaido Press, Hokkaido. 41-58. 96. Aton, S.J., G.D. Block, H. Tei, S. Yamazaki, and E.D. Herzog. 2004. Plasticity of circadian behavior and the suprachiasmatic nucleus following exposure to non-24-hour light cycles. J Biol Rhythms 19:198-207. 97. Nakamura, W., S. Yamazaki, N.N. Takasu, K. Mishima, and G.D. Block. 2005. Differential response of Period 1 expression within the suprachiasmatic nucleus. J Neurosci 25:5481-5487. 98. Albus, H., M.J. Vansteensel, S. Michel, G.D. Block, and J.H. Meijer. 2005. A GABAergic mechanism is necessary for coupling dissociable ventral and dorsal regional oscillators within the circadian clock. Curr Biol 15:886-893. 99. Davidson, A.J., B. London, G.D. Block, and M. Menaker. 2005. Cardiovascular tissues contain independent circadian clocks. Clin Exp Hypertens 27:307-311. 100. Lundkvist, G.B., and G.D. Block. 2005. Role of neuronal membrane events in circadian rhythm generation. Methods Enzymol 393:623-642. 101. Block, G. 2005. Keep time, stay healthy. Sci Aging Knowledge Environ 2005:13. 102. Block, G.D., G.B. Lundkvist, and Y. Kwak. 2005. Is there a role for membrane electrical events. In Biological Rhythms. K. Honma, and S. Honma, editors. Hokkaido Press, Hokkaido. 49-57. 103. Lundkvist, G.B. Kwak K, Davis E, Tei H, Block GD 2005. A calcium flux is required for circadian rhythm generation in mammalian pacemaker neurons J. Neurosci. 2005 25:7682-7686. 104. Davidson , A.J., M.T. Sellix, J. Daniel, S. Yamazaki, M. Menaker and G.D. Block Chronic jet-lag increases mortality in aged mice. 2006 Current Biology 16: R914-R916 Davidson, A.J., S. Yamazaki, D.M. Arble, M. Menaker, and G.D. Block. Resetting of central and peripheral circadian oscillators in aged rats. Neurobiology of Aging (in press) Block, G.D. Drosophila and mammalian circadian systems: Similarities on the surface, some differences at the core. Sleep and Biological Rhythms (in press) Lundkvist, G.B. and G.D. Block. Function and Pharmacology of Circadian Clocks. In: Handbook of Contemporary Neuropsychopharmacology (in press) Kwak, Y., G.B. Lundkvist, J. Brask, . Davidson, M. Menaker, K. Kristensson and G.D. Block . Interferon- gamma alters electrical activity and clock gene expression in suprachiasmatic nucleus neurons (under review) 109. VanderLeest, H.G., T. Houben, S. Michel, T. Deboer, H. Albus, M.J. Vansteensel, G.D. Block and J.H. Meijer. Seasonal encoding by the circadian pacemaker of the SCN (under review)
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