Therapeutic Anticancer Uses of the Active Principles of “Rhopalurus junceus” Venom

The Rhopalurus junceus is a scorpion belonging to the Buthidae family that finds its habitat in Cuba. This scorpion is known by the common name of “Blue Scorpion”. The venom is used on the island of Cuba as an alternative cure for cancer and, more recently, in the research of active components for biomedicine. Recently, the venom has been tested in several studies to investigate its effects on cancer cell lines, and the initial results of in vitro studies demonstrated how this poison can be effective on certain carcinoma cell lines (Hela, SiHa, Hep-2, NCI-H292, A549, MDA-MB-231, MDA-MB-468, and HT-29). The aim of this review is, therefore, to describe the effects of the venom on carcinoma lines and to investigate all anti-cancer properties studied in the literature. The research was conducted using four databases, Pub Med, Scopus, EBSCO, and Web of Science, through the use of keywords, by two independent reviewers following the PRISMA protocol, identifying 57 records. The results led to a total of 13 articles that met the eligibility criteria. The data extracted for the purpose of meta-analysis included the IC(50) of the venom on carcinoma cell lines. The results of the meta-analysis provided a pooled mean of the IC(50) of 0.645 mg/mL (95% CI: 0.557, 0.733), with a standard error (SE) = 0.045, p < 0.001. The analysis of the subgroups, differentiated by the type of cell line used, provided insight regarding how the scorpion venom was effective on the cell lines of lung origin (NCI-H292, A549, and MRC-5) with a pooled mean of IC50 0.460 mg/mL (95% CI: 0.290, 0.631) SE (0.087) p < 0.001. The results described in the literature for in vitro studies are encouraging, and further investigations should be carried out and deepened.