Effect of Leiurus quinquestriatus hebreus venom on calcium and deoxyglucose uptake in cultured cardiac cells

Galit Arie-Saadia; Shaul Sofer; Eli Zlotkin; Asher Shainberg

doi:10.1016/0041-0101(95)00152-2

Effect of Leiurus quinquestriatus hebreus venom on calcium and deoxyglucose uptake in cultured cardiac cells

Galit Arie-Saadia, Shaul Sofer, Eli Zlotkin, Asher Shainberg

The Mina and Everard Goodman Faculty of Life Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The effects of scorpion venom Leiurus quinquestriatus hebreus were studied on cardiac cells grown in culture. The venom (30 μg/ml) increased significantly (P < 0.05) Ca²⁺ uptake into intact cardiocytes and to sarcoplasmic reticulum of skinned cells. [³H]Deoxyglucose uptake was also increased significantly (P < 0.05) in venom treated cardiocytes. It was found that fractions I and III of the venom, separated by gel filtration and ion exchange chromatography, are responsible for the increased Ca²⁺ uptake by the sarcoplasmic reticulum, whereas fraction IIb, III and IV are responsible for the accelerated rate of uptake of ⁴⁵Ca and [³H]deoxyglucose by intact cells. Ca channel blockers prevented these effects and similar results were obtained by propranolol. Thus, it is concluded that the venom exerts its effect through activation of β-adrenoceptors which causes the opening of L-type Ca channels.

Original language	English
Pages (from-to)	435-442
Number of pages	8
Journal	Toxicon
Volume	34
Issue number	4
DOIs	https://doi.org/10.1016/0041-0101(95)00152-2
State	Published - Apr 1996

Bibliographical note

Funding Information:
Acknowledgements-We are indebted to MS T. Zinman and MS A. Isaac for their valuable technical assistance. This work was partially supported by funds from the Otto Meyerhoff Drug Receptor Center at Bar-Ilan University.

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title = "Effect of Leiurus quinquestriatus hebreus venom on calcium and deoxyglucose uptake in cultured cardiac cells",

abstract = "The effects of scorpion venom Leiurus quinquestriatus hebreus were studied on cardiac cells grown in culture. The venom (30 μg/ml) increased significantly (P < 0.05) Ca2+ uptake into intact cardiocytes and to sarcoplasmic reticulum of skinned cells. [3H]Deoxyglucose uptake was also increased significantly (P < 0.05) in venom treated cardiocytes. It was found that fractions I and III of the venom, separated by gel filtration and ion exchange chromatography, are responsible for the increased Ca2+ uptake by the sarcoplasmic reticulum, whereas fraction IIb, III and IV are responsible for the accelerated rate of uptake of 45Ca and [3H]deoxyglucose by intact cells. Ca channel blockers prevented these effects and similar results were obtained by propranolol. Thus, it is concluded that the venom exerts its effect through activation of β-adrenoceptors which causes the opening of L-type Ca channels.",

author = "Galit Arie-Saadia and Shaul Sofer and Eli Zlotkin and Asher Shainberg",

note = "Funding Information: Acknowledgements-We are indebted to MS T. Zinman and MS A. Isaac for their valuable technical assistance. This work was partially supported by funds from the Otto Meyerhoff Drug Receptor Center at Bar-Ilan University.",

year = "1996",

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doi = "10.1016/0041-0101(95)00152-2",

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AU - Zlotkin, Eli

AU - Shainberg, Asher

N1 - Funding Information: Acknowledgements-We are indebted to MS T. Zinman and MS A. Isaac for their valuable technical assistance. This work was partially supported by funds from the Otto Meyerhoff Drug Receptor Center at Bar-Ilan University.

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N2 - The effects of scorpion venom Leiurus quinquestriatus hebreus were studied on cardiac cells grown in culture. The venom (30 μg/ml) increased significantly (P < 0.05) Ca2+ uptake into intact cardiocytes and to sarcoplasmic reticulum of skinned cells. [3H]Deoxyglucose uptake was also increased significantly (P < 0.05) in venom treated cardiocytes. It was found that fractions I and III of the venom, separated by gel filtration and ion exchange chromatography, are responsible for the increased Ca2+ uptake by the sarcoplasmic reticulum, whereas fraction IIb, III and IV are responsible for the accelerated rate of uptake of 45Ca and [3H]deoxyglucose by intact cells. Ca channel blockers prevented these effects and similar results were obtained by propranolol. Thus, it is concluded that the venom exerts its effect through activation of β-adrenoceptors which causes the opening of L-type Ca channels.

AB - The effects of scorpion venom Leiurus quinquestriatus hebreus were studied on cardiac cells grown in culture. The venom (30 μg/ml) increased significantly (P < 0.05) Ca2+ uptake into intact cardiocytes and to sarcoplasmic reticulum of skinned cells. [3H]Deoxyglucose uptake was also increased significantly (P < 0.05) in venom treated cardiocytes. It was found that fractions I and III of the venom, separated by gel filtration and ion exchange chromatography, are responsible for the increased Ca2+ uptake by the sarcoplasmic reticulum, whereas fraction IIb, III and IV are responsible for the accelerated rate of uptake of 45Ca and [3H]deoxyglucose by intact cells. Ca channel blockers prevented these effects and similar results were obtained by propranolol. Thus, it is concluded that the venom exerts its effect through activation of β-adrenoceptors which causes the opening of L-type Ca channels.

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Effect of Leiurus quinquestriatus hebreus venom on calcium and deoxyglucose uptake in cultured cardiac cells

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