The long-lasting contraction induced by transmural stimulation in the longitudinal muscle of the guinea-pig gastric corpus.

Sakamoto, Youichi; Morishita, Hideji; Imanaga, Issei

doi:10.2170/jjphysiol.37.621

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…The contraction of long duration which was observed in eachpreparation of taenia coli and stomach as above was attributable to prostaglandins released from the wall of each preparation (Burnstock et al ., 1975;Sakamoto 1983Sakamoto , 1985Sakamoto , 1987. The contraction of long duration observed in thehamster and mouse gallbladders, as stated before, is similar to that observed in each preparation of taenea coli and stomach as above.…”

Section: Introductionsupporting

confidence: 76%

Studies on the Electrical Stimulation-Induced Contractile Responses of Hamster and Mouse Gallbladders.

Yoshida

Koeda

1992

J. Smooth Muscle Res.

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Section: Introductionsupporting

confidence: 76%

Studies on the Electrical Stimulation-Induced Contractile Responses of Hamster and Mouse Gallbladders.

Yoshida

Koeda

1992

J. Smooth Muscle Res.

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“…Indomethacin (Sigma) was dissolved in ethanol, after the method described by SAKAMOTO et al (1987), and added to the bathing solution. The final concentration of ethanol was less than 0.2%.…”

Section: Methodsmentioning

confidence: 99%

Postpartum changes in the mechanical responses of the circular muscle of rat uterus.

Osa

Maruta

1988

Jpn.J.Physiol

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The circular muscle strips were isolated from rat uterus 10-60 h after parturition, and the electrical and mechanical responses were investigated. The muscle strips exhibited a variety of contractile activity ranging from frequent spontaneous contractions generated on an elevated muscle tone to a sustained contracture, when incubated with Mg-free Krebs solution. The muscle tone was lowered, and phasic contractions were abolished when the external Ca was removed. Muscle tone was also lowered by addition of 1.2 mM Mg, 1 mM spermidine, or 1 mM tetracaine. The membrane potential was about -25 mV in a muscle which exhibited a contracture, and the membrane was hyperpolarized by 20-25 mV by the application of 1.2 mM Mg or 1 mM spermidine. Addition of indomethacin (1.5-4.5 x 10 -5 M) caused a gradual decrease in muscle tone, and the membrane was hyperpolarized. In view of the above results, it is hypothesized that Ca-influx was increased, for which prostaglandin(s) was probably responsible, in the circular muscle of postpartum rat uterus, thereby elevating the muscle tone in Mg-free solution.

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“…Another explanation is that the excitatory effects of ATP are indirect, due to stimulation of prostaglandin biosynthesis (Burnstock et al 1975;Huizinga et al 1981;Sakamoto et al 1987;Lefebvre and Burnstock 1990;Baccari et al 1990aBaccari et al , 1991Baccari et al , 1992Baccari et al , 1996.…”

Section: Stomachmentioning

confidence: 99%

Peripheral Nervous System

Burnstock¹,

Verkhratsky

2012

Purinergic Signalling and the Nervous System

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The long-lasting contraction induced by transmural stimulation in the longitudinal muscle of the guinea-pig gastric corpus.

Abstract: The mechanisms involved in the long-lasting contraction induced by transmural stimulation were investigated in the isolated longitu-

Cited by 5 publications

References 15 publications

Studies on the Electrical Stimulation-Induced Contractile Responses of Hamster and Mouse Gallbladders.

Studies on the Electrical Stimulation-Induced Contractile Responses of Hamster and Mouse Gallbladders.

Postpartum changes in the mechanical responses of the circular muscle of rat uterus.

Peripheral Nervous System

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