000140209 001__ 140209 000140209 005__ 20240321220751.0 000140209 0247_ $$2doi$$a10.3389/fnins.2018.00641 000140209 0247_ $$2pmid$$apmid:30294252 000140209 0247_ $$2pmc$$apmc:PMC6158315 000140209 0247_ $$2ISSN$$a1662-453X 000140209 0247_ $$2ISSN$$a1662-4548 000140209 0247_ $$2altmetric$$aaltmetric:48671627 000140209 037__ $$aDZNE-2020-06531 000140209 041__ $$aEnglish 000140209 082__ $$a610 000140209 1001_ $$0P:(DE-2719)2812530$$aOverall, Rupert W$$b0$$eFirst author$$udzne 000140209 245__ $$aThe Small World of Adult Hippocampal Neurogenesis. 000140209 260__ $$aLausanne$$bFrontiers Research Foundation$$c2018 000140209 264_1 $$2Crossref$$3online$$bFrontiers Media SA$$c2018-09-20 000140209 3367_ $$2DRIVER$$aarticle 000140209 3367_ $$2DataCite$$aOutput Types/Journal article 000140209 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1603722641_24004 000140209 3367_ $$2BibTeX$$aARTICLE 000140209 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000140209 3367_ $$00$$2EndNote$$aJournal Article 000140209 520__ $$aMaking mechanistic sense of genetically complex biological systems such as adult hippocampal neurogenesis poses conceptual and many practical challenges. Transcriptomics studies have helped to move beyond single-gene approaches and have greatly enhanced the accessibility to effects of greater numbers of genes. Typically, however, the number of experimental conditions compared is small and the conclusions remain correspondingly limited. In contrast, studying complex traits in genetic reference populations, in which genetic influences are varied systematically, provides insight into the architecture of relationships between phenotypes and putative molecular mechanisms. We describe that the correlation network among transcripts that builds around the adult neurogenesis phenotype and its endophenotypes is, as expected, a small-world network and scale free. The high degree of connectivity implies that adult neurogenesis is essentially an 'omnigenic' process. From any gene of interest, a link to adult hippocampal neurogenesis can be constructed in just a few steps. We show that, at a minimum correlation of 0.6, the hippocampal transcriptome network associated with adult neurogenesis exhibits only two 'degrees of separation.' This fact has many interesting consequences for our attempts to unravel the (molecular) causality structure underlying adult neurogenesis and other complex biological systems. Our article is not written with the expert on network theory in mind but rather aims to raise interest among neurobiologists, active in neurogenesis and related fields, in network theory and analysis as a set of tools that hold great promise for coping with the study of 'omnigenic' phenotypes and systems. 000140209 536__ $$0G:(DE-HGF)POF3-342$$a342 - Disease Mechanisms and Model Systems (POF3-342)$$cPOF3-342$$fPOF III$$x0 000140209 542__ $$2Crossref$$i2018-09-20$$uhttps://creativecommons.org/licenses/by/4.0/ 000140209 588__ $$aDataset connected to CrossRef, PubMed, 000140209 7001_ $$0P:(DE-2719)2000011$$aKempermann, Gerd$$b1$$eLast author$$udzne 000140209 77318 $$2Crossref$$3journal-article$$a10.3389/fnins.2018.00641$$b : Frontiers Media SA, 2018-09-20$$tFrontiers in Neuroscience$$v12$$x1662-453X$$y2018 000140209 773__ $$0PERI:(DE-600)2411902-7$$a10.3389/fnins.2018.00641$$gVol. 12, p. 641$$p641$$q12<641$$tFrontiers in neuroscience$$v12$$x1662-453X$$y2018 000140209 8564_ $$uhttps://pub.dzne.de/record/140209/files/fnins-12-00641.pdf$$yOpenAccess 000140209 8564_ $$uhttps://pub.dzne.de/record/140209/files/fnins-12-00641.gif?subformat=icon$$xicon$$yOpenAccess 000140209 8564_ $$uhttps://pub.dzne.de/record/140209/files/fnins-12-00641.jpg?subformat=icon-1440$$xicon-1440$$yOpenAccess 000140209 8564_ $$uhttps://pub.dzne.de/record/140209/files/fnins-12-00641.jpg?subformat=icon-180$$xicon-180$$yOpenAccess 000140209 8564_ $$uhttps://pub.dzne.de/record/140209/files/fnins-12-00641.jpg?subformat=icon-640$$xicon-640$$yOpenAccess 000140209 8564_ $$uhttps://pub.dzne.de/record/140209/files/fnins-12-00641.pdf?subformat=pdfa$$xpdfa$$yOpenAccess 000140209 8567_ $$2Pubmed Central$$uhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC6158315 000140209 909CO $$ooai:pub.dzne.de:140209$$pdnbdelivery$$pdriver$$pVDB$$popen_access$$popenaire 000140209 9101_ $$0I:(DE-588)1065079516$$6P:(DE-2719)2812530$$aDeutsches Zentrum für Neurodegenerative Erkrankungen$$b0$$kDZNE 000140209 9101_ $$0I:(DE-588)1065079516$$6P:(DE-2719)2000011$$aDeutsches Zentrum für Neurodegenerative Erkrankungen$$b1$$kDZNE 000140209 9131_ $$0G:(DE-HGF)POF3-342$$1G:(DE-HGF)POF3-340$$2G:(DE-HGF)POF3-300$$aDE-HGF$$bForschungsbereich Gesundheit$$lErkrankungen des Nervensystems$$vDisease Mechanisms and Model Systems$$x0 000140209 9141_ $$y2018 000140209 915__ $$0LIC:(DE-HGF)CCBYNV$$2V:(DE-HGF)$$aCreative Commons Attribution CC BY (No Version)$$bDOAJ 000140209 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess 000140209 915__ $$0StatID:(DE-HGF)0100$$2StatID$$aJCR$$bFRONT NEUROSCI-SWITZ : 2021$$d2022-11-09 000140209 915__ $$0StatID:(DE-HGF)0200$$2StatID$$aDBCoverage$$bSCOPUS$$d2022-11-09 000140209 915__ $$0StatID:(DE-HGF)0300$$2StatID$$aDBCoverage$$bMedline$$d2022-11-09 000140209 915__ $$0StatID:(DE-HGF)0501$$2StatID$$aDBCoverage$$bDOAJ Seal$$d2021-05-11T13:19:45Z 000140209 915__ $$0StatID:(DE-HGF)0500$$2StatID$$aDBCoverage$$bDOAJ$$d2021-05-11T13:19:45Z 000140209 915__ $$0StatID:(DE-HGF)0030$$2StatID$$aPeer Review$$bDOAJ : Blind peer review$$d2021-05-11T13:19:45Z 000140209 915__ $$0StatID:(DE-HGF)0199$$2StatID$$aDBCoverage$$bClarivate Analytics Master Journal List$$d2022-11-09 000140209 915__ $$0StatID:(DE-HGF)0150$$2StatID$$aDBCoverage$$bWeb of Science Core Collection$$d2022-11-09 000140209 915__ $$0StatID:(DE-HGF)1050$$2StatID$$aDBCoverage$$bBIOSIS Previews$$d2022-11-09 000140209 915__ $$0StatID:(DE-HGF)1110$$2StatID$$aDBCoverage$$bCurrent Contents - 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