Autocrin

Autocrine hormones secreted, which act directly on the releasing cell itself, are secreted. An example for this are the Synapses of the nervous system, which stop the delivery of Neurotransmitters when enough of them have been secreted to trigger the desired effect.

https://de.wikipedia.org/wiki/Autokrine_Sekretion _{(Wikipedia CC-by-sa-3.0)}