Neural circuitry linking mating and egg laying in Drosophila females.

Neural circuitry linking mating and egg laying in Drosophila females.
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DOI:
10.1038/s41586-020-2055-9
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发表时间:
2020-03
期刊:
影响因子:
64.8
通讯作者:
Dickson BJ
Dickson BJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wang F;Wang K;Forknall N;Patrick C;Yang T;Parekh R;Bock D;Dickson BJ

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Mating and egg-laying are tightly coordinated events in the reproductive life of oviparous females. Oviposition is typically rare in virgin females but is initiated after copulation. Here, we identify the neural circuitry that links egg-laying to mating status in Drosophila melanogaster. Activation of female-specific descending interneurons, the oviDNs, is necessary and sufficient for egg-laying, and is equally potent in virgin and mated females. Upon mating, a male seminal fluid protein, the sex peptide (SP), triggers many behavioural and physiological changes in the female, including the onset of egg-laying. SP is detected by sensory neurons (SPSNs) in the uterus, and silences both SPSNs and their postsynaptic SAG ascending neurons. We show here that SAG neurons directly activate the female-specific pC1 neurons. GABAergic oviINs mediate feedforward inhibition from pC1 neurons to both oviDNs and their major excitatory input, the oviENs. Thus, by attenuating the SAG inputs to pC1 neurons and oviINs, SP disinhibits oviDNs to enable egg-laying after mating. This circuitry thus coordinates the two key events in female reproduction: mating and egg-laying.
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