Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction
Buthus C56 toxin from venom of the Indian red scorpion Mesobuthus tamulus was studied for its effects on spontaneous miniature excitatory junctional potentials (MEJP) on Drosophila larval neuromuscular junctions. C56 toxin was isolated on CM-Cellulose with linear gradient of ammonium acetate buffer,...
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ftdoajarticles:oai:doaj.org/article:409e3ab4f64147859db21e65df11abfe 2023-05-15T15:06:01+02:00 Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction S. P. Gawade 2003-01-01T00:00:00Z https://doi.org/10.1590/S1678-91992003000100004 https://doaj.org/article/409e3ab4f64147859db21e65df11abfe EN eng SciELO http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992003000100004 https://doaj.org/toc/1678-9199 doi:10.1590/S1678-91992003000100004 1678-9199 https://doaj.org/article/409e3ab4f64147859db21e65df11abfe Journal of Venomous Animals and Toxins including Tropical Diseases, Vol 9, Iss 1, Pp 65-75 (2003) Mesobuthus tamulus C56 toxin Drosophila melanogaster neuromuscular miniature excitatory junctional potentials (MEJPs) Arctic medicine. Tropical medicine RC955-962 Toxicology. Poisons RA1190-1270 Zoology QL1-991 article 2003 ftdoajarticles https://doi.org/10.1590/S1678-91992003000100004 2022-12-31T04:02:16Z Buthus C56 toxin from venom of the Indian red scorpion Mesobuthus tamulus was studied for its effects on spontaneous miniature excitatory junctional potentials (MEJP) on Drosophila larval neuromuscular junctions. C56 toxin was isolated on CM-Cellulose with linear gradient of ammonium acetate buffer, pH 6.0. Toxin purity was determined on SDS slab gel electrophoresis. Effective concentration of C56 toxin was based on contraction paralysis units (CPU) in Drosophila 3rd instar larvae by microinjection (0.1 CPU/ml = 2 x 10-6 g/ml). The toxin-induced excitatory junctional potentials were studied for calcium dependency (0.2 mM to 1.2 mM Ca2+) in Drosophila Ringer. Excitatory junctional potential amplitude was increased with increasing calcium concentration; maximum increase in the frequency at 0.4 mM Ca2+/4 mM Mg2+ Drosophila Ringer. It was suggested that while amplitude of excitatory junctional potentials was increased with concentration, maximum frequency increase at 0.4 mMCa2+/4 mM Mg2+ Drosophila Ringer may be due to augmented Ca2+ influx in 0.4 mM Ca2+, when NMDA receptors were maximally activated in C56 toxin-treated Drosophila larval neuromuscular junction. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Indian Ringer ENVELOPE(162.050,162.050,-77.250,-77.250) Journal of Venomous Animals and Toxins including Tropical Diseases 9 1 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Mesobuthus tamulus C56 toxin Drosophila melanogaster neuromuscular miniature excitatory junctional potentials (MEJPs) Arctic medicine. Tropical medicine RC955-962 Toxicology. Poisons RA1190-1270 Zoology QL1-991 |
spellingShingle |
Mesobuthus tamulus C56 toxin Drosophila melanogaster neuromuscular miniature excitatory junctional potentials (MEJPs) Arctic medicine. Tropical medicine RC955-962 Toxicology. Poisons RA1190-1270 Zoology QL1-991 S. P. Gawade Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction |
topic_facet |
Mesobuthus tamulus C56 toxin Drosophila melanogaster neuromuscular miniature excitatory junctional potentials (MEJPs) Arctic medicine. Tropical medicine RC955-962 Toxicology. Poisons RA1190-1270 Zoology QL1-991 |
description |
Buthus C56 toxin from venom of the Indian red scorpion Mesobuthus tamulus was studied for its effects on spontaneous miniature excitatory junctional potentials (MEJP) on Drosophila larval neuromuscular junctions. C56 toxin was isolated on CM-Cellulose with linear gradient of ammonium acetate buffer, pH 6.0. Toxin purity was determined on SDS slab gel electrophoresis. Effective concentration of C56 toxin was based on contraction paralysis units (CPU) in Drosophila 3rd instar larvae by microinjection (0.1 CPU/ml = 2 x 10-6 g/ml). The toxin-induced excitatory junctional potentials were studied for calcium dependency (0.2 mM to 1.2 mM Ca2+) in Drosophila Ringer. Excitatory junctional potential amplitude was increased with increasing calcium concentration; maximum increase in the frequency at 0.4 mM Ca2+/4 mM Mg2+ Drosophila Ringer. It was suggested that while amplitude of excitatory junctional potentials was increased with concentration, maximum frequency increase at 0.4 mMCa2+/4 mM Mg2+ Drosophila Ringer may be due to augmented Ca2+ influx in 0.4 mM Ca2+, when NMDA receptors were maximally activated in C56 toxin-treated Drosophila larval neuromuscular junction. |
format |
Article in Journal/Newspaper |
author |
S. P. Gawade |
author_facet |
S. P. Gawade |
author_sort |
S. P. Gawade |
title |
Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction |
title_short |
Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction |
title_full |
Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction |
title_fullStr |
Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction |
title_full_unstemmed |
Excitatory effects of Buthus C56 toxin on Drosophila larval neuromuscular junction |
title_sort |
excitatory effects of buthus c56 toxin on drosophila larval neuromuscular junction |
publisher |
SciELO |
publishDate |
2003 |
url |
https://doi.org/10.1590/S1678-91992003000100004 https://doaj.org/article/409e3ab4f64147859db21e65df11abfe |
long_lat |
ENVELOPE(162.050,162.050,-77.250,-77.250) |
geographic |
Arctic Indian Ringer |
geographic_facet |
Arctic Indian Ringer |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Journal of Venomous Animals and Toxins including Tropical Diseases, Vol 9, Iss 1, Pp 65-75 (2003) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992003000100004 https://doaj.org/toc/1678-9199 doi:10.1590/S1678-91992003000100004 1678-9199 https://doaj.org/article/409e3ab4f64147859db21e65df11abfe |
op_doi |
https://doi.org/10.1590/S1678-91992003000100004 |
container_title |
Journal of Venomous Animals and Toxins including Tropical Diseases |
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9 |
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1 |
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1766337686930456576 |