|Rolf O. Karlstrom
Professor of Biology, University of Massachusetts
Ph.D.: University of Utah
Developmental Neurobiology: Axon Guidance, Forebrain Patterning, and Pituitary Development
As the brain develops neural tissue is precisely patterned to form discreet functional domains, then neurons extend axons over relatively vast distances to connect these different brain regions. My laboratory uses zebrafish as a simple vertebrate system to study how the forebrain and pituitary gland become functionally patterned, and to investigate how axons navigate through the developing brain. Accessible and rapid early development, in combination with the ability to transplant cells between embryos, express genes both transiently and transgenically, and do genetic screens, makes zebrafish a powerful model system for the study for early neural development.
Guner B, Ozacar AT, Thomas JE, Karlstrom RO. (2008) Graded Hh and Fgf signaling independently regulate pituitary cell fates and help establish the PD and PI of the zebrafish adenohypophysis. Endocrinology. 2008 May 22. [Epub ahead of print]
Bergeron SA, Milla LA, Villegas R, Shen MC, Burgess SM, Allende ML, Karlstrom RO, Palma V. (2008) Expression profiling identifies novel Hh/Gli-regulated genes in developing zebrafish embryos. Genomics. 91(2):165-77
Guner B, Karlstrom RO. (2007) Cloning of zebrafish nkx6.2 and a comprehensive analysis of the conserved transcriptional response to Hedgehog/Gli signaling in the zebrafish neural tube. Mechanisms of Development Gene Expr Patterns. 2007 Apr 7(5):596-605
Cerda, G.A., Thomas, J.E., Allende, M.A., Karlstrom, R.O. , Palma, V. (in press). Electroporation of DNA, RNA, and morpholinos into zebrafish embryos. Methods .
Barresi, M.J., Hutson, L. Chien, C-B., and Karlstrom, R.O . (2005) Hedgehog regulated Slit expression determines commissure and glial cell position in the zebrafish forebrain. Development, 132(16); 3643-56
Vanderlaan, G.M., Tyurina, O.V., Karlstrom, R.O. , and Chandrasekhar, A., (2005) Gli Function is Essential for Motor Neuron Induction in Zebrafish. Developmental Biology, 282(2);550-70
Tyurina, O.V., Guner, B., Popova, E., Feng, J., Schier, A.F., Kohtz, J.D., and Karlstrom, R.O . (2005) Zebrafish Gli3 functions as both an activator and a repressor in Hedgehog signaling. Developmental Biology. 277;537- 556
Feng, J., White, B., Tyurina, O., Guner, B., Larson, T., Lee, H., Karlstrom, R. O ., and Kohtz, J. (2004). Synergistic and antagonistic roles of the Sonic hedgehog N and C-terminal lipids. Development 131(17):4357-70.
Sekimizu, K, Nishioka, N, Sasaki, H, Takeda, H, Karlstrom, R.O . and Kawakami, A. (2004).. The zebrafish iguana locus encodes Dzip1, a novel zinc finger protein required for proper regulation of hedgehog signaling. Development . 131, 2521.
Sbrogna, J.L., Barresi, M.J.F., and Karlstrom, R.O. (2003) Multiple roles
Karlstrom, R.O., Tyurina, O., Kawakami, A., Nishioka, N., Talbot, W.S.,
Culverwell, J, and Karlstrom, R.O. (2002) Making the connection: Retinal
diIorio, P. J., J. B. Moss, J. L. Sbrogna, R. O. Karlstrom and L. G. Moss (2002). "Sonic hedgehog is required early in pancreatic islet development." Dev Biol 244(1): 75-84.
Kondoh, H., Ukhikawa, M., Yoda, H., Takeda, H., Furutani-Seiki, M., and Karlstrom, R.O. (2000) Zebrafish mutations in gli-mediated hedgehog signaling lead to lens transdifferentiation from the adenohypophysis anlage. Mechanisms of Development 96: 165-174.
Karlstrom, R.O., Talbot, W.S. and Schier, A.F. (1999) Synteny cloning of zebrafish you-too: Mutations in the hedgehog target gli2 affect ventral forebrain patterning. Genes and Development 13, 388-393.
Karlstrom, R.O. and Kane, D.A. (1996) A time-lapse flip-book of zebrafish development. Development 123, 2-460.
Karlstrom, R.O., et al. (1996) Zebrafish mutations affecting retinotectal axon pathfinding. Development 123, 427-438.