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Holz O, Apel D and Hassel M (2020) Alternative pathways control actomyosin contractility in epitheliomuscle cells during morphogenesis and body contraction. Dev Biol 463(1):88-98.

Suryawanshi A, Schaefer K, Holz O, Apel D, Lange E, Hayward DC, Miller DJ, and Hassel M (2020) What lies beneath: Hydra provides cnidarian perspectives into the evolution of FGFR docking proteins. Development, Genes and Evolution 230(3): 227-238.

Kratzer M-C, England L, Apel D, Hassel M and Borchers A (2019) Evolution of the Rho guanine nucleotide exchange factors Kalirin and Trio and their gene expression in /Xenopus/ development. Gene Expression Patterns 32:18-27.

Holz O, Apel D, Steinmetz P, Lange L, Hopfenmüller S, Ohler K, Sudhop S, Hassel M (2017) Bud detachment in Hydra requires activation of FGFR and a Rho - ROCK - myosin II signaling pathway to ensure formation of a basal constriction. Dev Dyn. 2017 Jul;246(7):502-516. doi: 10.1002/dvdy.24508. Epub 2017 May 22.

Until 2014, Dr. Nicole Rebscher, Postdoc, worked in my group on Platynereis (independently funded projects).

Lange E, Bertrand S, Holz O, Rebscher N, Hassel M (2014) Dynamic expression of a Hydra FGF at boundaries and termini. Dev Genes Evol 224(4):235-244. doi:10.1007/s00427-014-0480-1Abstract

Hasse C, Holz O, Lange E, Pisowodzki L, Rebscher N, Eder MC, Hobmayer B, Hassel M (2014) FGFR-ERK signaling is an essential component of tissue separation. Dev Biol 395(1):154-66.

Lidke AK, Bannister S, Löwer AM, Apel D, Kollmann M, Ackermann CF, García-Alonso J, Raible F, Rebscher N (2014) 17beta-Estradiol induces supernumerary primordial germ cells in embryos of the polychaete Platynereis dumerilii. Gen. Comp. Endocrinol. 196:52-61

Rudolf A, Hübinger C, Hüsken K, Vogt A, Rebscher N, Önel SF, Renkawitz-Pohl R, Hassel M (2013) The Hydra FGFR Kringelchen partially rescues a Drosophila Heartless mutant. Dev Genes Evol 223 (3): 159-169. [2012 Epub ahead of print] PMID: 23111653 doi: 10.1387/ijdb.113454ab Abstract

Böttger A, Hassel M (2012) Hydra, a model system to trace the mechanisms controlling the emergence of boundaries in eumetazoa. Int J Dev Biol Vol. 56(6-8):583-91. Review doi: 10.1387/ijdb.113454ab Abstract

Rebscher N, Lidke AK, Ackermann ChF (2012) Hidden in the crowd. Primordial germ cells and somatic stem cells in the mesodermal posterior growth zone of the polychaete Platynereis dumerilli are two distinct cell populations. EvoDevo 3:9

Garcia-Alonso J, Ayoola JA, Crompton, J, Rebscher N, Hardege JD (2011) Development and maturation in the nereidid polychaetes Platynereis dumerilii and Nereis succinea exposed to xenoestrogens. Comp. Biochem. Phys. C. 154: 196-203

Forêt S, Seneca F, Danielle de Jong D, Bieller A, Hemmrich G, Augustin R, Hayward DC, Ball EE, Bosch TCG, Agata K, Hassel M and Miller DJ (2010) Phylogenomics reveals an anomalous distribution of USP genes in metazoans. Mol Biol Evol 28(1):153-161. doi: 10.1093/molbev/msq183

Hasse C, Rebscher N, Reiher W, Sobjinski K, Tessmar-Raible K., Arendt D, Hassel M. (2010) Three consecutive generations of nephridia occur during development in Platynereis dumerilii  (Annelida, Polychaeta). Dev Dyn 239(7):1967-1976. Abstract

Hassel M, Cornelius MG, vom Brocke J, Schmeiser HH. (2010) Total nucleotide analysis of Hydra DNA and RNA by micellar electrokinetic chromatography with laser-induced fluorescence detection and 32p-postlabeling. Electrophoresis 31(2): 299-302. Abstract

Rebscher N, Deichmann C, Sudhop S, Fritzenwanker HJ, Green S., Hassel M (2009) Conserved intron positions in FGFR genes reflect the modular structure of FGFR and reveal stepwise addition of domains to an already complex ancestral FGFR. Dev Genes Evol 219 (9-10):455-468. DOI 10.1007/s00427-009-0309-5. Abstract

Rebscher N, Volk C, Teo R, Plickert G. (2008) Vasa protein is a component of the germ plasm in the cnidarian Hydractinia echinata. Dev. Dyn 237 (6):1736-1745

Rebscher N, Zelada-Gonzales, F., Banisch, T. U., Raible, F. Arendt, A. (2007) Vasa unveils a common origin of germ cells and of somatic stem cells from the porsterior growth zone in the polychaete Platynereis dumerilii. Dev. Biol 306:599-611

Tessmar-Raible K, Steinmetz PR, Snyman H, Hassel M, Arendt D (2005) Fluorescent two-color whole mount in situ hybridization in Platynereis dumerilii  (Polychaeta, Annelida), an emerging marine molecular model for evolution and development. Biotechniques 39 (4), 460-464 Abstract

Sudhop S, Coulier F, Bieller A, Vogt A, Hotz T, Hassel M (2004) Signalling by the FGFR-like tyrosine kinase, Kringelchen, is essential for bud detachment in Hydra vulgaris. Development 131 (16), 4001-4011 Abstract

Kaloulis K, Chera S, Hassel M, Gauchat D, Galliot B. (2004) Reactivation of developmental programs: the cAMP-response element-binding protein pathway is involved in Hydra head regeneration. PNAS 101(8), 2363-8 Abstract

Jantzen H, Hassel M, Schulze I. (1998) Hydroperoxides mediate lithium effects on regeneration in Hydra. Comp. Biochem. Phys. Part C 119(2), 165-175

Hassel M (1998) Upregulation of a cPKC gene in Hydra vulgaris is tightly coupled to the differentiation of head structures. Dev. Genes Evol. 207(8), 489-501

Hassel M, Bridge D, Stover N, Kleinholz H, Steele RE (1998) The level of expression of a protein kinase C gene may be an important component of the patterning process in Hydra. Dev. Genes Evol. 207(8), 502-514 Abstract

Hornberger M, Hassel M (1997) Expression of HvRACK1, a member of the RACK1 subfamily of regulatory WD40 proteins, is coordinated between epithelial and interstitial cells in a position-dependent manner. Dev. Genes Evol. 206, 435-446

Hassel M, Kleinholz H, Steele RE (1997) Morphogenesis in the freshwater polyp Hydra vulgaris is accompanied by upregulation of protein kinase C expression and activity. Verh. Dt. Zool. Ges. 90, 98

Hassel M, Leitz T, Müller WA. (1996) Signals and signal-transduction systems in the control of development in Hydra and Hydractinia, Int. J. Dev. Biol., 40, 323-330 Abstract

Hassel M, Bieller A (1996) Stepwise reduction of the lithium concentration gradually increases the head forming potential in Hydra vulgaris and possibly activates the PI-cycle, Dev. Biol. 177 (2), 439-448 Abstract

Hassel M (1996) Inositol phosphate patterns in morphogenetically active Hydra vulgaris, Verh. Dt. Zool. Ges. 89, 146

Hassel M, Klenk G, Frohme M. (1996) Prevention of unwanted proteolysis during extraction from protease-rich tissue. Anal. Biochem., 242, 274-275 Abstract

Hassel M, Albert K, Hofheinz S. (1993) Pattern formation in Hydra vulgaris is controlled by lithium sensitive processes, Dev. Biol. 156, 362-371 Abstract

Hassel M, Berking S (1990) Lithium ions interfere with pattern control in Hydra vulgaris, Rouxs Arch. Dev. Biol. 198, 382-388

Hassel M, Berking S (1989) Nerve cell and nematocyte production in Hydra is deregulated by lithium ions, Rouxs Arch. Dev. Biol. 197, 471-475