JAK/STAT signalling in Drosophila controls cell motility during germ cell migration.
The gonad is formed from two populations of cells originating at different locations: the primordial germ cells (PGCs), giving rise to either sperm or oocytes, and the somatic gonadal mesoderm precursors (SGPs), which support development of the gametes. Following the PGCs' migration during gastrulation, these two populations meet, forming the immature gonad. We present evidence that during embryonic development, the PGCs require the canonical JAK/STAT signalling cascade to migrate efficiently towards the SGPs. Loss of function for any element of the JAK/STAT pathway causes frequent germ cell mislocalisation. We have found that wild-type germ cells produce filopodia while they migrate through the mesoderm towards the gonad. Our observations suggest that PGCs use filopodia to migrate and to keep contact with each other. Interestingly, activation of the JAK/STAT pathway is required for these filopodia to form, and ectopic JAK/STAT activation enhances their formation.
Faculty of Life Sciences, University of Manchester, C.1247 Michael Smith Building, Oxford Road, Manchester M13 9PT, U.K. Stephen-Brown-3@manchester.ac.uk
Stephen
S
Brown
Martin P
MP
Zeidler
James E Castelli-Gair
JE
Hombría
D000818:Animals; D002465:Cell Movement; D004330:Drosophila / Q000166:cytology / Q000196:embryology* / Q000235:genetics / Q000378:metabolism*; D029721:Drosophila Proteins / Q000378:metabolism*; D004625:Embryo, Nonmammalian / Q000166:cytology / Q000378:metabolism; D005854:Germ Cells / Q000166:cytology / Q000378:metabolism*; D007150:Immunohistochemistry; D053612:Janus Kinases; D008648:Mesoderm / Q000166:cytology; D011505:Protein-Tyrosine Kinases / Q000378:metabolism*; D050791:STAT Transcription Factors / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D014157:Transcription Factors / Q000378:metabolism*
D029721:Drosophila Proteins; D050791:STAT Transcription Factors; D014157:Transcription Factors; D011505:Protein-Tyrosine Kinases; D053612:Janus Kinases; C085845:hop protein, Drosophila