Colonial spider venom offers new leads for cancer and antimicrobial research
Indian researchers profile the venom gland of a social spider, identifying molecules with potential for future cancer and antimicrobial drug research.
A team of Indian researchers has completed the first comprehensive molecular and functional analysis of the venom gland of Stegodyphus sarasinorum, a colonial spider native to the Indian subcontinent. The study, published in the peer-reviewed journal Scientific Reports, has identified a range of proteins and small molecules that could serve as leads for future drug discovery, particularly in the areas of cancer and antimicrobial treatments.
The research, led by A.P. Ajay Kumar of the Department of Zoology at Sree Neelakanta Government Sanskrit College, Pattambi, employed an integrated multi-omics approach. This included transcriptomics, proteomics, metabolomics, and Confocal Raman Spectroscopy to build a detailed molecular inventory of the venom gland. The analysis identified 31 proteins through transcriptomic profiling, 32 proteins through proteomic analysis, and 81 metabolites, including amino acids, biogenic amines, and organic acids.
Among the significant findings were protein families already known for their biomedical relevance. These include hemocyanins, which are known to stimulate immune responses and are of interest in cancer immunotherapy research. The study also detected U12 and U20 lycotoxins, peptides that can disrupt bacterial and cancer cell membranes, making them potential templates for developing antimicrobial peptides and targeted anti-cancer compounds.
Laboratory experiments demonstrated that venom gland extracts exhibited dose-dependent cytotoxicity against Dalton's Lymphoma Ascites (DLA) cancer cells. While this suggests the presence of molecules with anti-cancer potential, the researchers caution that these experiments were conducted only on cultured cells. Extensive validation, including studies on additional cancer models, healthy cells, and animal trials, is required before any clinical application can be considered.
S. sarasinorum is notable for its social behaviour, living in permanent colonies and hunting cooperatively, a trait shared by only a small number of spider species worldwide. This makes it an important model for studying both spider behaviour and venom biology. The experimental work was carried out by research scholar Veena Venugopal, with contributions from collaborators at several Indian universities and Ajman University in the UAE.