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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 30, No. 4, 2009, pp. 381-388
Bioline Code: zr09057
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 30, No. 4, 2009, pp. 381-388

 en Venom Properties of the Spider Latrodectus tredecimguttatus check for this species in other resources and Comparison of Two Venom-Collecting Methods
Duan, Zhi-gui; Yang, Jing; Yan, Xiao-jun; Zeng, Xiong-zhi; Wang, Xian-chun & Liang, Song-ping

Abstract

The bioactivities and proteinous compositions of venoms collected by two different methods from Latrodectus tredecimguttatus check for this species in other resources were analyzed and compared. Most of proteinous venom components were high-molecular-mass acidic proteins (>104). Compared with the venom obtained from dissected venom gland (DGV), the venom obtained by electrical stimulation (ESV) contained more high molecular mass proteins, but the venom proteins and peptides with low molecular mass (<104) in the preparations were very similar. Intraperitoneal injection of the two venoms in mice gave rise to similar poisoning symptoms and the LD50 values of ESV and DGV were (0.16±0.03) mg/kg and (0.39±0.05) mg/kg, respectively. LD50 values of ESV and DGV in cockroaches ( Periplaneta Americana check for this species in other resources ) were 1.87 μg/g and 2.32 μg/g, respectively. ESV was able to block neuromuscular transmission in the mouse phrenic nerve-hemidiaphragm preparation within (25.0±2.2) min at a concentration of 3.2x10-6g/mL, whereas DGV blocked neuromuscular transmission within (45.7±1.8) min at the same concentration. The fraction of the venom containing proteins and peptides with molecular mass <104 did not obviously affect the transmission. Those results demonstrated that Latrodectus tredecimguttatus venom was a mixture rich in larger proteins rather than smaller proteins and peptides; the mammalian toxicities of the venom were due primarily to the high molecular weight acidic proteins rather than low molecular weight peptides; the active components contained in ESV and DGV were similar but the content in ESV was higher than that in DGV.

Keywords
Latrodectus tredecimguttatus; Venom; Venom collection; Property; Comparative analysis

 
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