Treatment of SEC62 over-expressing tumors by Thapsigargin and Trifluoperazine

Biomolecular Concepts
Christina KörbelMarkus Greiner

Abstract

Treatment with analogues of the SERCA-inhibitor Thapsigargin is a promising new approach for a wide variety of cancer entities. However, our previous studies on various tumor cells suggested resistance of SEC62 over-expressing tumors to this treatment. Therefore, we proposed the novel concept that e.g. lung-, prostate-, and thyroid-cancer patients should be tested for SEC62 over-expression, and developed a novel therapeutic strategy for a combinatorial treatment of SEC62 over-expressing tumors. The latter was based on the observations that treatment of SEC62 over-expressing tumor cells with SEC62-targeting siRNAs showed less resistance to Thapsigargin as well as a reduction in migratory potential and that the siRNA effects can be mimicked by the Calmodulin antagonist Trifluoperazine. Therefore, the combinatorial treatment of SEC62 over-expressing tumors was proposed to involve Thapsigargin and Trifluoperazine. Here, we addressed the impact of Thapsigargin and Trifluoperazine in separate and combined treatments of heterotopic tumors, induced by inoculation of human hypopharyngeal squamous cell carcinoma (FaDu)-cells into the mouse flank. Seeding of the tumor cells and/or their growth rate were significantly reduced by all three ...Continue Reading

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Citations

Jan 14, 2020·Journal of Chemotherapy·Xue-Jun WangMei-Juan Yan
Sep 27, 2018·Frontiers in Cell and Developmental Biology·Ioanna DaskalakiNektarios Tavernarakis
Dec 9, 2020·Journal of Medicinal Chemistry·Yulin Ren, A Douglas Kinghorn
May 13, 2021·Visceral Medicine·Markus CasperSusanne N Weber

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Methods Mentioned

BETA
light microscopy

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