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Ando H, Kuwasawa K. Neuronal and neurohormonal control of the heart in the stomatopod crustacean,Squilla oratoria. J Exp Biol 2004; 207:4663-77. [PMID: 15579561 DOI: 10.1242/jeb.01272] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARYThe heart of Squilla oratoria contains a cardiac ganglion that consists of 15 intrinsic neurons, supplied by a pair of inhibitory nerves and two pairs of excitatory nerves, arising from the central nervous system. These comprise the extrinsic cardiac innervation. The paired cardio-inhibitor (CI)nerves run out in the 10th pair of nerve roots emerging from the subesophageal ganglion (SEG). The cell bodies of the CI neurons are found in the hemisphere of the 1st segment of the SEG contralateral to the nerve roots in which the CI axons emerge. The two pairs of 1st and 2nd cardio-accelerator (CA1 and CA2)nerves run out in the 16th and 19th pairs of nerve roots of the SEG. The cell bodies of the CA1 and CA2 neurons are found in the hemispheres of the 3rd and 4th segments of the SEG ipsilateral to the nerve roots in which the CA1 and CA2 axons are found.The heartbeat was activated by application of glutamate, serotonin,dopamine, octopamine or acetylcholine, which were applied to the heart by perfusion into an organ bath. Joro-spider toxin (JSTX) blocked myocardial excitatory junctional potentials evoked by the cardiac ganglion. Neuronal cell bodies and processes in the heart were examined using immunocytochemical techniques. All 15 neurons of the cardiac ganglion showed glutamate-like immunoreactivity. Glutamate may be a neurotransmitter of the cardiac ganglion neurons.JSTX also blocked cardiac acceleration by activation of CA1 and CA2 axons. CA1 and CA2 axons showed glutamate-like immunoreactivity. It is likely that glutamate is a neurotransmitter for the cardio-acceleratory neurons.The heartbeat was inhibited by application of γ-amino-butyric acid(GABA). Cardiac inhibition induced by activation of CI axons was blocked by picrotoxin. CI axons showed GABA-like immunoreactivity. These results may support the identification of GABA as an extrinsic inhibitory neurotransmitter.
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Affiliation(s)
- Hiroshi Ando
- Department of Oral Physiology, Matsumoto Dental University School of Dentistry, Shiojiri 399-0781, Japan
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F.-Tsukamoto Y, Kuwasawa K, Takeuchi S, Mano M. Physiological Saline Suitable for the Marine Isopod Crustacean Bathynomus doederleini. Zoolog Sci 2000. [DOI: 10.2108/0289-0003(2000)17[425:pssftm]2.0.co;2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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The control of cardiac rhythmicity and of blood distribution in crustaceans. Comp Biochem Physiol A Mol Integr Physiol 1999. [DOI: 10.1016/s1095-6433(99)00146-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Sakurai A, Mori A, Yamagishi H. Acceleratory nervous regulation of juvenile myogenic hearts in the isopod crustacean Ligia exotica. Comp Biochem Physiol A Mol Integr Physiol 1999. [DOI: 10.1016/s1095-6433(99)00152-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ando H, Yazawa T, Kuwasawa K. Cardioacceleratory reflexes triggered by mechanoproprioceptors of the swimmerets in the stomatopod crustacean Squilla oratoria. Comp Biochem Physiol A Mol Integr Physiol 1999. [DOI: 10.1016/s1095-6433(99)00148-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Okada J, Kuwasawa K, Kihara A, Tsukamoto YF, Yazawa T. Cholinergic Inhibitory Innervation of the Cardioarterial Valves in the Isopod Bathynomus doederleini. Zoolog Sci 1997. [DOI: 10.2108/zsj.14.571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Yazawa T, Kuwasawa K. Intrinsic and extrinsic neural and neurohumoral control of the decapod heart. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf02118416] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Wilkens JL. Cardiac and circulatory control in decapod Crustacea with comparisons to molluscs. ACTA ACUST UNITED AC 1987. [DOI: 10.1007/bf01952215] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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A neuroanatomical and electrophysiological analysis of nervous regulation in the heart of an isopod crustacean,Bathynomus doederleini. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1984. [DOI: 10.1007/bf00610689] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yazawa T, Kuwasawa K. The cardio-regulator nerves of hermit crabs: Multimodal activation of the heart by the accelerator axons. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 1984. [DOI: 10.1007/bf00610584] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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