Control of C. elegans hermaphrodite gonad size and shape by vab-3/Pax6-mediated regulation of integrin receptors.
Integrin receptors for extracellular matrix are critical for cell motility, but the signals that determine when to stop are not known. Analysis of distal tip cell (DTC) migration during gonadogenesis in Caenorhabditis elegans has revealed the importance of transcription factor vab-3/Pax6 in regulating the alpha integrin genes, ina-1 and pat-2. Utilizing vab-3 mutants, we show that the down-regulation of ina-1 is necessary for DTC migration cessation and the up-regulation of pat-2 is required for directionality. These results demonstrate concomitant, but distinct roles in migration for each integrin. Notably, transcriptional control of migration termination provides a new mechanism for regulation of morphogenesis and organ size.
Meighan
Christopher M
CM
Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.
Schwarzbauer
Jean E
JE
D000818:Animals; D030801:Animals, Genetically Modified; D017173:Caenorhabditis elegans; D029742:Caenorhabditis elegans Proteins / Q000235:genetics / Q000502:physiology*; D002465:Cell Movement / Q000235:genetics; D012734:Disorders of Sex Development / Q000235:genetics; D004625:Embryo, Nonmammalian; D018507:Gene Expression Regulation, Developmental / Q000187:drug effects; D006066:Gonads / Q000033:anatomy & histology* / Q000196:embryology*; D018398:Homeodomain Proteins; D016023:Integrins / Q000235:genetics*; D008954:Models, Biological; D009024:Morphogenesis / Q000235:genetics; D009929:Organ Size / Q000235:genetics; D000071841:PAX6 Transcription Factor; D051761:Paired Box Transcription Factors; D034741:RNA, Small Interfering / Q000494:pharmacology; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics; D014157:Transcription Factors / Q000502:physiology*
D029742:Caenorhabditis elegans Proteins; D018398:Homeodomain Proteins; C521951:Ina-1 protein, C elegans; D016023:Integrins; D000071841:PAX6 Transcription Factor; D051761:Paired Box Transcription Factors; D034741:RNA, Small Interfering; D018160:Receptors, Cytoplasmic and Nuclear; D014157:Transcription Factors; C095405:vab-3 protein, C elegans