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SPAD-1, a serine proteinase associated disintegrin from Russell's viper venom disrupts adhesion of MCF7 human breast cancer cells. [Mass Spectrometry - Proteomics]

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TitleSPAD-1, a serine proteinase associated disintegrin from Russell's viper venom disrupts adhesion of MCF7 human breast cancer cells. [Mass Spectrometry - Proteomics]
Publication TypeJournal Article
Year of Publication2022
AuthorsBhattacharya N, Kolvekar N, Mondal S, Sarkar A, Chakrabarty D
JournalToxicon
Volume221
Pagination106979
Date Published2022 Nov 21
Type of ArticleJournal Article
ISSN1879-3150
KeywordsCytotoxic, RGD-Like disintegrin motifs, Russell's viper Venom toxin, Snake venom serine proteinases
Abstract

Serine Proteinase Associated Disintegrin-1 (SPAD-1) is a low molecular mass (26 kDa) positively charged protein purified from Russell's viper venom (RVV) possessing cytotoxic activity on MCF7, human breast cancer cells. Primary sequence analysis of the protein confirms that it is a novel Snake Venom Serine Proteinase (SVSP) and a member of the trypsin family. SPAD-1 contains a conserved triad of Histidine (H), Aspartic acid(D) and Serine(S) residues at its active site for proteinase activity and also an adjacent histidine-glycine-aspartic acid (HGD) disintegrin-like motif. The serine proteinase and disintegrin parts are functionally active and independent. SPAD-1 showed proteolytic digestion of fibrinogen and fibronectin, but laminin digestion was below the detectable limit. Proteolytically inactivated SPAD-1 inhibited collagen and ADP-induced platelet aggregation. This study proposes considering Serine Proteinase Associated Disintegrin (SPAD) as a new group of snake venom proteins. Members of this group contain a serine proteinase catalytic triad and a disintegrin-like motif. SPAD-1 caused visible morphological changes in MCF7 cells, including a reduction of the cell-to-cell attachments, rounding of cell shape and death, in vitro. SPAD-1 also showed a dose-dependent significant decrease in the invasive potency of breast cancer cells. Confocal microscopic analysis revealed the breakage of nuclei of the SPAD-1-treated cells. SPAD-1 also increased cell detachment from the poly L-lysine-coated, laminin-coated and fibronectin-coated culture plate matrices, confirming the disintegrin activity. This study concludes that SPAD-1 may be a good candidate for anti-tumour drug design in the future.

URLhttps://www.sciencedirect.com/science/article/abs/pii/S0041010122003300
DOI10.1016/j.toxicon.2022.106979
Alternate JournalToxicon
PubMed ID36423674