51. The effects of some putative transmitters and biogenic amines on uropod abductor muscle in the crayfish Procambarus clarkii and Cambaroides japonicus
- Author
-
M. Yoshino and M. Hisada
- Subjects
medicine.medical_specialty ,Biogenic Amines ,Uropod ,Immunology ,Action Potentials ,Glutamic Acid ,Astacoidea ,In Vitro Techniques ,Neuromuscular junction ,Glutamates ,Biogenic amine ,Internal medicine ,medicine ,Animals ,gamma-Aminobutyric Acid ,Pharmacology ,chemistry.chemical_classification ,Procambarus clarkii ,Motor Neurons ,Neurotransmitter Agents ,biology ,Muscles ,Iontophoresis ,biology.organism_classification ,Endocrinology ,medicine.anatomical_structure ,chemistry ,Excitatory postsynaptic potential ,medicine.symptom ,Cambaroides japonicus ,Acetylcholine ,Muscle contraction ,medicine.drug ,Muscle Contraction - Abstract
1.The effects of some putative transmitters and biogenic amines were examined on the uropod ventral abductor exopodite (AbdExV) muscle in two crayfish species Procambarus clarkii and Cambaroides japonicus. 2. Bath application of l-glutamate to the AbdExV muscle caused sustained contract while gamma-aminobutyric acid (GABA) depressed the nerve-evoked contraction of the muscle. Acetylcholine (ACh) had no effect on both the resting tension and the nerve-evoked contraction. 3. Iontophoresis of l-glutamate and GABA onto the surface of the muscle fiber further confirmed that glutamate and GABA are the possible excitatory and inhibitory transmitters respectively at the neuromuscular junction of AbdExV muscle. 4. Bath application of 5-hydroxytryptamine (5-HT) and octopamine (Oct) caused enhancement of the nerve-evoked contraction but dopamine (DA) had no effect on both the resting tension and the nerve-evoked contraction.
- Published
- 1984