Advances in Anatomy, Embryology and Cell Biology Hubert Wartenberg Andreas Miething Kjeld Møllgård The Origin of a New Progenitor Stem Cell Group in Human Development An Immunohistochemical-, Light- and Electronmicroscopical Analysis AdvancesinAnatomy,EmbryologyandCellBiologypublishescriticalreviewsandstate-of- the-art surveys on all aspects of anatomy and of developmental, cellular and molecular biology,withaspecialemphasisonbiomedicalandtranslationaltopics. 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ThisSpringerimprintispublishedbytheregisteredcompanySpringerNatureSwitzerlandAG Theregisteredcompanyaddressis:Gewerbestrasse11,6330Cham,Switzerland Preface Since studies on human stem cells are legally restricted in Germany (Wiedemann et al. 2004), the use of the stem cells in this study needs some introductory explanations. The applied human embryos and fetal tissues have been obtained in the years 1968 (Vossmeyer 1971 and Holstein et al. 1971) and 1985 (Wartenberg 1985,1989a,b):wegotthemfromlegalinterruptionsinlocalhospitalsinHamburg and in the University Hospital Bonn, Germany. The material was taken from male and female embryos and fetuses ranging from 21 to140 mm crown-rump length (CRL).Theyderivedfrommedicalabortionswhichwereprovidedforpathological examinations. In each case, the consent of the heads of the clinical institution (in Bonn: Prof. Dr. Krebs, head of the Gynaecologic Clinic, University of Bonn, Germany) and that of the physicians who performed the medical treatment were obtained.Whenthepresentstudiesonstemcellswerestarted,theembeddedtissues couldstillbeusedandgaveexcellentresultsevenafterseveraldecadesofstorage.In all cases, the stem cells have been obtained long before the current legislation restricted thestudies on human stem cells. The restrictions presented inthe Delphi studyalreadymentioned(Wiedemannetal.2004)weremerelyretrospective.What- everthelegalobligationsareabouttheuseofhumanstemcells,theresultspresented here offer a very important view on stem cell biology. The human embryonic and fetal material used for Chromogranin A-immunohistochemistry was based on the specimens already described (Møllgård et al. 2010 and Mamsen et al. 2012). In short, they were obtained in connection with legal abortions carried out in Copen- hagen,Denmark.Oralandwritteninformationwasgivenandinformedconsentwas obtainedfrom all contributing women, accordingto andapproved by theRegional CommitteeonBiomedicalResearchEthicsCopenhagenandFrederiksbergCounties (KF(01)258206). Bonn,Germany HubertWartenberg Bonn,Germany AndreasMiething KøbenhavnN,Denmark KjeldMøllgård v vi Preface References Holstein,A.F.,Wartenberg,H.,Vossmeyer,J.:ZurCytologiederpränatalenGonadenentwicklung beimMenschen.III.DieEntwicklungderLeydigzellenimHodenvonEmbryonenundFeten.Z. AnatEmtwickl-Gesch.135,43–68(1971) Mamsen, L.S., Brøchner, C.B., Byskov, A.G., Møllgard, K.: The migration and loss of human primordialstemcellsfromthehindgutepitheliumtowardsthegenitalridge.IntJDevBiol.56, 771–778(2012) Møllgård, K., Jespersen, A., Lutterodt, M.C., Yding Andersen, C., Høyer, P.E., Byskov, A.G.: HumanprimordialgermcellsmigratealongnervefibersandSchwanncellsfromthedorsalhind gutmesenterytothegonadalridge.MolHumReprod.16,621–631(2010) Vossmeyer, J.: Zur Cytologie der praenatalen Gonadenentwicklung beim Menschen. I. Die Histogenese des Hodens, an Eponschnitten untersucht. Z. Anat. Entwickl.-Geschichte. 134, 146–164(1971) Wartenberg,H.:Morphologicalstudiesontheroleoftheperiductalstromaintheregressionofthe humanmaleMüllerianduct.AnatEmbryol.171,311–323(1985) Wartenberg,H.:DifferentiationandDevelopmentofthetestes.In.TheTestis,SecondEdition,edit. byH.BurgerandD.deKretser,RavenPress,NewYork(1989a). Wartenberg,H.:Ultrastructureoffetalovaryincludingoogenesis.In:Blerkom,V.,Motta,J.(eds.) Ultrastructureofhumangametogenesisandearlyembryogenesis:Chapter3,pp.61–84(1989b) Wiedemann, P.M., Simon, J., Schicktanz, S., Tannert, C.: The future of them cell research in Germany.ADelphiStudy.EMBOreports.5,927–931(2004) Acknowledgement TheexcellenttechnicalassistanceofMrs.U.Schwaabisgratefullyacknowledged. vii Abstract In light and electron microscopic sections of plastic-embedded human embryonal andfetalorgans,theoriginofanewgroupofprogenitorstemcellshasbeenfound whicharedealtwithinthepresentstudies.Thedistributionofthesecellscanresultin a large quantity of ectopic stem cells. The observation of these ectopic stem cells leads us to postulate the existence of a basic wave of stem cell progenitors. This processproceedsearlierandindependentlyfromgermcellmigration.Thisfirstwave of progenitor stem cell migration initially reaches the peri-aortal AMG region (Aortal-Mesonephric-Gonadal region). From here, some of these progenitor cells entertheaorta,aredistributedthroughthevascularsystem,andbecometheembry- onal stem cells (reserve cells) in many peripheral tissues. A second part delivers progenitorcellsfortheadrenal“anlage.”WithintheperipheralZonadefinitivaofthe adrenal cortex, the progenitor cells multiply and subsequently leave the adrenal cortex through a gate of the capsule. The progenitor cells arrive at the pre-aortal sympathetic plexus (“second brain”). Within the plexus ganglia they form new organ-likeclusters,theparaganglia.Inasecondprocess,theprogenitorcells(chro- maffin cells) enter sympathetic nerve bundles. Here an “axonal migration” starts, whichguidestheprogenitorcellstoseveralperipheralorgans.Duringthismigration process, the stem cells develop into their final state. In the adrenal cortex, the ingrowing nerves guide the stem cells to the adrenal medulla. In the pancreas, the ingrowingnervefibersguidethestemcellstotheislets. Keywords Human(cid:1)Progenitorstemcells(cid:1)AMGregion(cid:1)Adrenal(cid:1)Zonadefinitiva (cid:1) Para-aortal plexus (cid:1) Paraganglia (cid:1) Autonomic nervous system (cid:1) Guided axonal migration (cid:1) Pancreas (cid:1) Gonadal and Intestine stem cells (cid:1) Stem cells II (cid:1) APUD system(cid:1)Teratoma ix Contents 1 TheOriginofaNewProgenitorStemCellGroupinHuman Development. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 DistributionofProgenitorStemCellsfromtheAMG-Systemandthe Adrenal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1.1 Introduction.. . . .. . . .. . . .. . . .. . . .. . . . .. . . .. . . .. . 1 1.1.2 MaterialsandMethods. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 DevelopmentoftheAdrenalMedullaandOtherEndocrine Glands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 1.2.1 DevelopmentoftheAutonomicInnervationoftheAdrenal GlandandtheFormationoftheAdrenalMedulla. . . . . . . . . 34 1.2.2 DevelopmentoftheAutonomicInnervationoftheHuman PancreasandOriginofthePancreaticIslets. . . . . . . . . . . . . 37 1.2.3 DevelopmentoftheHumanParathyroidGland. . . . . . . . . . 44 1.2.4 FetalStemCellsatPerigonadalandIntragonadalSites. . . . . 46 1.2.5 Down-GrowthofAutonomicNervesintheStomachandthe IntestineTube:TheMigrationandtheWhereaboutsofthe StemCells. . .. . . . .. . . .. . . . .. . . .. . . .. . . . .. . . .. . . 51 1.2.6 Discussion:TheProcessofStemCellDistributionand MigrationWithintheAutonomicNervestoOrgansofthe HumanDevelopingOrganism. . . . . .. . . . . . .. . . . . .. . . . 56 1.3 FinalViewonStemCellOriginDuringHumanDevelopment. . . . . 57 1.3.1 Introduction.. . . .. . . .. . . .. . . .. . . .. . . . .. . . .. . . .. . 57 1.3.2 TheOriginoftheStemCellsofGroupII. . . . . . . . . . . . . . 59 1.3.3 TypesofStemCells. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 1.3.4 FurtherStemCellCategoriesDuringtheHuman DevelopmentalProcess:TheRôleoftheAMG-Region. . . . 64 1.3.5 HowFetalStemCellsDelivertheProgenitorCellsofthe AdrenalCortexandHowTheyPassIntotheLocalAutonomic Plexus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 1.3.6 TheCellsMultiplicatedintheAdrenalCortexBecomeFetal StemCells. . .. . . . .. . . .. . . . .. . . .. . . .. . . . .. . . .. . . 66 xi