349P The amount of cancer stem cells and the sensitivity to anticancer drugs in glioblastoma primary cell culture

Susova, O.; Poletaeva, Anna; Lupatov, A. Yu.; Холоденко, И. В.; Карамышева, А. Ф.; Митрофанов, А. А.; Насхлеташвили, Д. Р.; Nasedkina, T. V.; Bekyashev, A.

doi:10.1016/j.annonc.2021.08.013

Cited by 1 publication

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“…The cytotoxic activity of the compounds was evaluated by the MTT method on six cell lines and one primary human tumor culture to determine the semi-inhibitory concentration ( IC 50) for non-small cell lung cancer A549, colon cancer HCT-116, hepatocarcinoma Huh7, pancreatic carcinoma PANC-1, breast cancer SKBR3, ovarian cancer SKOV3, and a primary culture of human glioblastoma Gbl13n we had obtained earlier [ 14 , 15 ]. The data presented in Fig.…”

Section: Biological Activitymentioning

confidence: 99%

Dimeric Bis-Benzimidazole-Pyrroles DB2Py(n) – AT-Site-Specific Ligands: Synthesis, Physicochemical Analysis, and Biological Activity

Susova,

Каrshieva,

Кostyukov

et al. 2024

Acta Naturae

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Its broad spectrum of biological activity makes benzimidazole a fundamental pharmacophore in pharmaceutics. The paper describes newly synthesized AT-specific fluorescent bis-benzimidazole molecules DB2Py(n) that contain a pyrrolcarboxamide fragment of the antibiotic drug netropsin. Physico-chemical methods using absorption, fluorescence, and circular dichroism spectra have shown the ability of bis-benzimidazole-pyrroles to form complexes with DNA. The new DB2Py(n) series have turned out to be more toxic to human tumor lines and less vulnerable to non-tumor cell lines. Bis-benzimidazole-pyrroles penetrated the cell nucleus, affected the cell-cycle synthesis (S) phase, and inhibited eukaryotic topoisomerase I in a cell-free model at low concentrations. A real-time tumor cell proliferation test confirmed the molecule’s enhanced toxic properties upon dimerization. Preliminary cytotoxicity data for the bis-benzimidazole-pyrroles tested in a cell model with a MDR phenotype showed that monomeric compounds can overcome MDR, while dimerization weakens this ability to its intermediate values as compared to doxorubicin. In this respect, the newly synthesized cytotoxic structures seem promising for further, in-depth study of their properties and action mechanism in relation to human tumor cells, as well as for designing new AT-specific ligands.

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Section: Biological Activitymentioning

confidence: 99%