Regulation of the ciliary rhythm in Platynereis larvae across time scales
Rhythms@Sea Symposium, SZN
Nov 6, 2023
Gáspár Jékely
Centre for Organismal Studies, Heidelberg University
@jekely@biologists.social
Platynereis dumerilii
![]()
- breeding culture, full life-cycle
- embryos daily, year round
- genome sequence
- microinjection, transgenesis
- neuron-specific promoters and antibodies
- knock-out lines
- neuronal connectome
- whole-body neuronal activity imaging
- whole-animal pharmacology by bath application 😎
Ciliary rhythm at the minute scale - ciliary arrests
Whole-body coordination of ciliary arrests
![]()
Ciliary rhythm at the circadian scale - day/night regulation of arrests
![]()
Ciliary arrests are modulated by many neuromodulators
Whole-body vEM reconstruction of a 3d Platynereis larva
Ciliomotor neurons
24 ciliomotor neurons
Serotonergic neurons activate cilia
Ser-h1 neurons, EM reconstruction
Cholinergic neurons induce ciliary arrests
Cholinergic Loop neurons, EM reconstruction
Ciliary beating increases under pressure
![]()
![]()
![]()
Pressure is sensed by photoreceptors with ramified cilia
![]()
Circuitry of ciliary photoreceptors
Myoinhibitory peptide increases closures during settlement
Mushroom body inputs to the ciliomotor system
Acknowledgements
- Emelie Brodrick
- Cyrielle Kaltenrieder
- Réza Shahidi
- Milena Marinkovic
- Daniel Thiel
- Sanja Jasek
- Cameron Hird
- Rebecca Turner
- Luis A. Bezares-Calderón
- Kei Jokura
- Luis Yanez Guerra
- Alexandra Kerbl
Former lab members
- Albina Asadulina
- James Beard
- Markus Conzelmann
- Nadine Randel
- Philipp Bauknecht
- Martin Gühmann
- Cristina Pineiro-Lopez
- Nobuo Ueda
- Aurora Panzera
- Csaba Verasztó
- Elizabeth Williams
![]()