Vincristine (Leurocristine) is a microtubule-destabilizing agent (MDA). Vincristine (Leurocristine) binds to tubulin and inhibits the formation of microtubules, thereby inhibiting mitosis of the cancer cell. Vincristine (Leurocristine) is used to treat hematologic cancers, such as leukemia and lymphoma, and childhood sarcomas[1][2].
KIF18A-IN-2 is a potent KIF18A inhibitor (IC50=28 nM). KIF18A-IN-2 causes significant mitotic arrest and increases the number of mitotic cells in tumor tissues. KIF18A-IN-2 can be used for researching cancer[1].
HDAC-IN-39 (compound 16c) is a potent HDAC inhibitor, with IC50 values of 1.07 μM (HDAC1), 1.47 μM (HDAC2), and 2.27 μM (HDAC3), respectively. HDAC-IN-39 also significantly inhibits microtubule polymerization. HDAC-IN-39 induces cell cycle arrest at the G2/M phase. HDAC-IN-39 displays promising anticancer activity against resistant cancer cells[1].
BRD9876 is the “rigor” inhibitor that locks kinesin-5 (Eg5) in a state with enhanced microtubules (MTs) binding, leading to bundling and stabilization of MTs. BRD9876 interacts with the tyrosine 104 residue that is part of the α4-α6 allosteric binding pocket. BRD9876 specifically targets microtubule-bound Eg5 and selectively inhibits myeloma over CD34 cells. BRD9876 has the potential for multiple myeloma (MM) research[1][2][3][4].
CHM-1, a microtubule-destabilizing agent, inhibits tubulin polymerization. CHM-1 is a potent and selective antimitotic antitumor activity against human hepatocellular carcinoma. CHM-1 induces growth inhibition and apoptosis via G2-M phase arrest in human hepatocellular carcinoma cells by activation of Cdc2 kinase activity[1][2][3].
10-Deacetyl-7-xylosyl paclitaxel is a Paclitaxel derivative with improved pharmacological features and higher water solubility.IC50 value:Target: Microtubule inhibitor10-Deacetyl-7-xylosyl paclitaxel induced mitotic cell cycle arrest and apoptosis as measured by flow cytometry, DNA laddering, and transmission electron microscopy. Pro-apoptotic Bax and Bad protein expression was up-regulated and anti-apoptotic Bcl-2 and Bcl-XL expression down-regulated, which lead to a disturbance of the mitochondrial membrane permeability and to the activation of caspase-9. In turn, caspase-9 activated downstream caspases-3 and -6, but not caspase-8. Bid was also activated by caspase-3. Reversely, treatment with a caspase-10-specific inhibitor could not protect PC-3 cells from 7-xylosyl-10-deacetyl-paclitaxel-triggered apoptosis. Moreover, 7-xylosyl-10-deacetylpaclitaxel had no effect on the expression of CD95 and NF-kappaB proteins, indicating that apoptosis was induced through the mitochondrial-dependent pathway in PC-3 cells.
Cabazitaxel is a semi-synthetic derivative of the natural taxoid 10-deacetylbaccatin III with potential antineoplastic activity.
Cevipabulin(TTI-237) is a novel, potent, synthetic small molecule, inhibits binding of vinblastine at the Vinca alkaloid site of the αβ-tubulin heterodimer.IC50 value: Target: Antimicrotubule agentin vitro: TTI-237 inhibited the binding of [(3)H]vinblastine to tubulin, but it caused a marked increase in turbidity development that more closely resembled the effect observed with docetaxel than that observed with vincristine. When applied to cultured human tumor cells at concentrations near its IC(50) value for cytotoxicity (34 nmol/L), TTI-237 induced multiple spindle poles and multinuclear cells, as did paclitaxel, but not vincristine or colchicine. Flow cytometry experiments revealed that, at low concentrations (20-40 nmol/L), TTI-237 produced sub-G(1) nuclei and, at concentrations above 50 nmol/L, it caused a strong G(2)-M block. The compound was a weak substrate of multidrug resistance 1 (multidrug resistance transporter or P-glycoprotein). In a cell line expressing a high level of P-glycoprotein, the IC(50) of TTI-237 increased 25-fold whereas those of paclitaxel and vincristine increased 806-fold and 925-fold, respectively. TTI-237 was not recognized by the MRP or MXR transporters [1]. TTI-237 inhibited the exchange of [(3)H]GTP at the exchangeable nucleotide site of the tubulin heterodimer, and was similar to vincristine in its effects on the phosphorylation of eight intracellular proteins in HeLa cells [3].in vivo: TTI-237 was active in vivo in several nude mouse xenograft models of human cancer, including LoVo human colon carcinoma and U87-MG human glioblastoma, when dosed i.v. or p.o [1].
Aha1/Hsp90-IN-1 (Compound 17) is an Aha1/Hsp90 complex inhibitor. Aha1/Hsp90-IN-1 disrupts Aha1/Hsp90 interactions with an IC50 of 3.32 μM. Aha1/Hsp90-IN-1 inhibits tau aggregation[1].
Taccalonolide AJ is a semi-synthesis compound with cellular microtubule stabilizing activity. Taccalonolide AJ exhibits high potency antiproliferative activity against cancer cells, with an IC50 of 4.2 nM for HeLa cells[1].
Eribulin (E7389; ER-086526), a synthetic analogue of halichondrin B in phase III clinical trials for breast cancer, binds to tubulin and microtubules.Target: Microtubule/TubulinEribulin suppressed centromere dynamics at concentrations that arrest mitosis. At 60 nmol/L eribulin (2 x mitotic IC(50)), the relaxation rate was suppressed 21%, the time spent paused increased 67%, and dynamicity decreased 35% (but without reduction in mean centromere separation), indicating that eribulin decreased normal microtubule-dependent spindle tension at the kinetochores, preventing the signal for mitotic checkpoint passage [1]. [(3)H]eribulin binds soluble tubulin at a single site; however, this binding is complex with an overall K(d) of 46 microM, but also showing a real or apparent very high affinity (K(d) = 0.4 microM) for a subset of 25% of the tubulin. Eribulin also binds microtubules with a maximum stoichiometry of 14.7 +/- 1.3 molecules per microtubule (K(d) = 3.5 microM), strongly suggesting the presence of a relatively high-affinity binding site at microtubule ends. At 100 nM, the concentration that inhibits microtubule plus end growth by 50%, we found that one molecule of eribulin is bound per two microtubules, indicating that the binding of a single eribulin molecule at a microtubule end can potently inhibit its growth. Eribulin does not suppress dynamic instability at microtubule minus ends [2]. Eribulin's in vivo superiority derives from its ability to induce irreversible mitotic blockade, which appears related to persistent drug retention and sustained Bcl-2 phosphorylation [3].
KX2-391 Mesylate is an inhibitor of Src that targets the peptide substrate site of Src, with GI50 of 9-60 nM in cancer cell lines.
7-xylosyltaxol(Taxol-7-xyloside) is a taxol (Paclitaxel) derivative; Paclitaxel binds to tubulin and inhibits the disassembly of microtubules.IC50 Value:Target: Microtubule/TubulinPaclitaxel is a compound extracted from the Pacific yew tree with antineoplastic activity. Paclitaxel also induces apoptosis by binding to and blocking the function of the apoptosis inhibitor protein Bcl-2 (B-cell Leukemia 2). Paclitaxel inhibits DNA synthesis and stimulates the release of tumor necrosis factor-α. Paclitaxel induces apoptosis in murine mammary carcinoma MCA-4 and ovarian carcinoma OCA-1 tumors.
Tubulin inhibitor 24 is a potent tubulin inhibitor. Tubulin inhibitor 24 inhibits tubulin polymerization. Tubulin inhibitor 24 induces cell cycle arrest at the G2/M phase in a concentration-dependent manner. Tubulin inhibitor 24 shows antitumor activity with no obvious toxicity[1].
Tubulin polymerization-IN-15 (compound 4) is a potent inhibitor of tubulin polymerization. Tubulin polymerization-IN-15 has the potential for the research of cancer diseases[1].
Tubulin polymerization-IN-56 (compound 8l), an indazole derivative, is a potent tubulin polymerization inhibitor through interacting with the colchicine site, resulting in cell cycle arrest and cellular apoptosis. polymerization-IN-56 reduces cell migration and leads to more potent inhibition of tumor growth in vivo[1].
Tubulin inhibitor 35 (compound 6b) is a dual inhibitor of topoisomerase I (IC50=~50 μM) and tubulin polymerization (IC50=5.69 μM). Tubulin inhibitor 35 inhibits migration and invasion of MGC-803 and RKO cell lines，and induces apoptosis via arresting cell cycle at G2/M phase. Tubulin inhibitor 35 exhibis potent efficacy in gastrointestinal tumor inhibiton (inhibits MGC-803 (IC50=0.09 μM) and RKO (IC50=0.2 μM) cell lines)[1].
Tubulin polymerization-IN-12 is a tubulin polymerization inhibitor (IC50=0.75 μM). Tubulin polymerization-IN-12 arrests cell cycle at G2/M phase, and exhibits cytotoxicity against cancer cells[1].
Ansamitocin P-3 is a microtubule inhibitor. Ansamitocin P-3 is a macrocyclic antitumor antibiotic.
Phomopsin A is a cyclic hexapeptide mycotoxin isolated from the fungus Phomopsis leptostomiformis. Phomopsin A is a noncompetitive inhibitor of the binding of radiolabeled vincristine to tubulin[1].
Tubulin inhibitor 20 (compound 1) is a potent inhibitor of tubulin. Tubulin inhibitor 20 has the potential for the research of cancer diseases[1].
Docetaxal (10-Acetyl docetaxel; PNU-101383), an analog of Docetaxel (HY-B0011), is a microtubule disassembly inhibitor, with antimitotic activity. Docetaxal has cytotoxicity for murine leukemic cells[1].
Colchicine is a tubulin inhibitor and a microtubule disrupting agent. Colchicine inhibits microtubule polymerization with an IC50 of 3 nM.
Vincristine-d3 (Leurocristine-d3) sulfate is the deuterium labeled Vincristine sulfate. Vincristine sulfate is an antitumor vinca alkaloid which inhibits microtubule formation in mitotic spindle, resulting in an arrest of dividing cells at the metaphase stage. It binds to microtubule with a Ki of 85 nM[1][2].
Oryzalin is a dinitroaniline herbicide, binding to plant tubulin and inhibits microtubule (MT) polymerization in vitro. Oryzalin depolymerizes MTs and prevented the polymerization of new MTs at all stages of the mitotic cycle[1].
Docetaxel Trihydrate is a semi-synthetic taxane analogue, acts as a microtubule stabilizer.
Tubulysin F is a highly cytotoxic peptide isolated from the myxobacterial species Archangium geophyra and Angiococcus disciformis. Tubulysin displays extremely potent cytotoxic activity in mammalian cells, including multidrug-resistant cell lines, with IC50 values in the lower nanomolar range[1]. Tubulysin F is a cytotoxic activity tubulysin which inhibits tubulin polymerization and leads to cell cycle arrest and apoptosis[2].
Tubulin/JAK2-IN-1 (compound 7g) is a dual inhibitor of Janus kinase 2 (JAK2) and microtubule. Tubulin/JAK2-IN-1 has potent antiproliferative activity against the cancer cells[1].
Tubulin/MMP-IN-2 is dual inhibitor of tubulin and matrix metalloproteinases. Tubulin/MMP-IN-2 can strongly inhibit tubulin polymerization and induces cell Apoptosis. Tubulin/MMP-IN-2 has inhibitory activities against MMP-2, MMP-3 and MMP-9 with IC50 values of 24.95 μM, 31.60 μM and 22.37 μM, respectively. Tubulin/MMP-IN-2 can be used for the research of cancer[1].
TN-16 is a potent inhibitor of microtubule polymerization with IC50 of 0.4-1.7 µM[1].