YCJ-02 is a selective Topoisomerase I (Top I) inhibitor. YCJ-02 can inhibit cell proliferation and induce apoptosis and G2/M phase arrest. YCJ-02 can induce DNA damage and increaseγ-H2AX levels. YCJ-02 can promote Top I deqradation via a ubiquitin/26S proteasome pathway. YCJ-02 increases the expressions of pro-apoptotic proteins Bad, Bax, and cleaved caspase-3. YCJ-02 shows broad-spectrum antitumor activity. YCJ-02 can be used for the research of cancer, such as intrahepatic cholangiocarcinoma (ICC).

NISC-6 is a novel dual Topo-IIα/Akt inhibitor. NISC-6 has inhibitory activity against various cells, such as UACC903 (IC50 = 2.5 µM) and CHL-1 (IC50 = 0.8 µM) cells. NISC-6 dose dependently induces early and late apoptosis. NISC-6 can be used for research on melanoma.

NK-611 is an epipodophyllotoxin derivative. NK-611 induces DNA double-strand breaks by inhibiting topoisomerase II (IC50 = 56 μM). NK-611 does not inhibit microtubule polymerization, thus avoiding the side effects of the parent compound, Podofilox. NK-611 exhibits broad-spectrum antitumor activity and demonstrates potent efficacy in in vivo models of leukemia. NK-611 can be used in cancer research.

F-14512 hydrochloride is an anticancer agent that utilizes the polyamine transport system (PTS) to selectively deliver polyamine-containing drugs to cancer cells. F-14512 hydrochloride enhances the affinity of polyamines for DNA, thereby inhibiting topoisomerase II and achieving selective cellular uptake. F-14512 hydrochloride exhibits significant cytotoxicity against cells with high PTS activity and induces DNA damage. F-14512 hydrochloride demonstrates potent antitumor activity in the MX1 breast tumor xenograft model. F-14512 hydrochloride could be used to study breast cancer.

GI-149893 is a selective topoisomerase I (TopoI) inhibitor. GI-149893 prevents DNA religation and induces irreversible DNA damage in tumor cells. GI-149893 is promising for research of cancers (e.g., colon carcinoma HT-29/SW-48, breast MX-1, prostate PC-3 xenografts).

PNU-142586 is the major metabolite of Linezolid. PNU-142586 can inhibit the activity of DNA topoisomerase 2-α (TOP2A) and DNA topoisomerase 2-β (TOP2B). PNU-142586 interferes with DNA replication and transcription by blocking the binding of DNA to TOP2 and inhibiting ATP hydrolysis. PNU-142586 can be used to study Linezolid-induced hematotoxicity and its molecular mechanism.

LD2-3 is a topoisomerase I inhibitor. LD2-3 can be connected to monoclonal antibodies via linkers to form antibody-drug conjugate (ADC) molecules. LD2-3 can be coupled with CEA antibodies to form ADC drugs for the study of CEA overexpressing tumors.

NBTI 5463 is a bacterial type II topoisomerases (topoisomerase II) inhibitor with antibacterial activity. NBTI 5463 inhibits GyrA and TopoIV in Pseudomonas aeruginosa and Escherichia coli. NBTI 5463 binds to topoisomerase II to prevent DNA cleavage and religation, inhibiting bacterial DNA replication and transcription. NBTI 5463 is promising for research of Gram-negative bacterial infection.

ARN21929 is a Topoisomerase II inhibitor with an IC50 of 4.5 μM. ARN21929 exhibits excellent kinetic and thermodynamic solubility as well as metabolic stability. However, ARN21929 shows poor antiproliferative activity against A549, DU145, MCF7, HeLa, and A375 cells. ARN21929 can be used in the study of cancer.

Topobexin (Topobexin 9) is a highly selective inhibitor for TOP2B. Topobexin selectively inhibits TOP2B in vitro and immobilizes TOP2B on DNA. Topobexin demonstrates significant protection of cardiomyocytes against DAU-induced damage. Topobexin prevents anthracycline-induced cardiotoxicity and DAU-induced decrease in LV systolic function in vivo with rabbit model.

XSJ110 is a potent irreversible topoisomerase I (Topo I) inhibitor with an IC50 value of 0.133 μM. XSJ110 blocks DNA topoisomerization, induces DNA double-strand breaks, and triggers cell cycle arrest at G0/G1 phase, inducing tumor cell apoptosis. XSJ110 is promising for research of ampullary carcinoma (AC).

Topoisomerase II inhibitor 23 is a potent topoisomerase II inhibitor (IC50 = 0.94 μM). Topoisomerase II inhibitor 23 shows high selectivity and exceptional cytotoxic activity in MCF-7, HepG2, and HCT116 cells. Topoisomerase II inhibitor 23 induces cell cycle arrest at the G1 phase, leading to inhibition of cell proliferation. Topoisomerase II inhibitor 2 induces apoptosis by up-regulating the pro-apoptotic Bax level and down-regulating the anti-apoptotic Bcl-2 level.

XSJ81 is an orally active anti-cancer agent. XSJ81 significantly inhibits the proliferation of ampullary carcinoma (AC) DPC-X3 cells with an IC50 of 0.655 μM. XSJ81 inhibits the colony formation, arrests cell cycle at the G2/M phase and inhibits the migration in DPC-X3 cells. XSJ81 induces DNA damage and apoptosis in DPC-X3 cells. XSJ81 demonstrates significant anti-tumor efficacy in mice bearing DPC-X3 xenografts. XSJ81 can be used for the study of ampullary carcinoma.

Topi MF-6 is a DNA topoisomerase I (Top1) inhibitor. Topi MF-6 has superior cytotoxicity against gastrointestinal cancer cells. Topi MF-6 can be used as an ADC payload.

Topoisomerase inhibitor 6 (Compound REDX05931) is a dual irreversible inhibitor of DNA gyrase and topoisomerase IV (MIC=0.06 μg/mL against fluoroquinolone-resistant S. aureus). Topoisomerase inhibitor 6 blocks DNA strand break-reunion, inducing lethal DNA damage. Topoisomerase inhibitor 6 is promising for research of Gram-positive bacterial infections (e.g., S. aureus, S. pneumoniae).

Genz-644282 is a non-camptothecin inhibitor of topoisomerase I with potential antineoplastic activity(IC50=1.2 nM).

Eleutherin ((+)-Eleutherin) is a pyranonaphthoquinones that is isolated from the bulb of Eleutherine americana and a potent catalytic inhibitor of Topoisomerase II. It exhibits potent anti-cancer activity and protects human umbilical vein endothelial cells (HUVECs) from injury in vitro.

ABBV-969 Payload is an agent-linker conjugate with a potent inhibitor of topoisomerase I and a linker designed for use in the antibody-drug conjugate (ADC) ABBV-969. It can be used in non-small cell lung cancer research.

β-Glu-PAB(CH2NH2)-Exatecan (Compound 9a) is a topoisomerase I inhibitor. β-Glu-PAB(CH2NH2)-Exatecan binds to the topoisomerase I-DNA complex to prevent DNA strand reconnection, thereby inducing DNA breakage and cell apoptosis. β-Glu-PAB(CH2NH2)-Exatecan can be specifically cleaved by β-glucuronidase highly expressed in the tumor microenvironment to release Exatecan for cytotoxic effect. β-Glu-PAB(CH2NH2)-Exatecan is also an intermediate of Mal((3S,3aR,6S,6aR) -hexahydrofuro [3, 2-B]furan-3,6-diamine-PEG12)-β -Glu-Pab-Exatecan. β-Glu-PAB(CH2NH2)-Exatecan is promising for research of cancers.

Topotecan acetate is a topoisomerase inhibitor.

OSUAB-0284 is a bacterial topoisomerase inhibitor. OSUAB-0284 has significant anti-staphylococcal activity, especially against methicillin-resistant Staphylococcus aureus (MRSA). OSUAB-0284 exerts its antibacterial effect by inhibiting bacterial topoisomerase. OSUAB-0284 can be used to study infections caused by drug-resistant bacteria such as MRSA.

Mal-Exatecan is a Mal (Maleimide) modified Exatecan. Rilpivirine is an effective and selective diarylpyrimidine (DAPY) non-nucleoside reverse transcriptase inhibitor (NNRTI). It exhibits potent antiviral activity against both wild-type HIV (EC50 = 0.4 nM) and mutant strains (EC50 = 0.1-2.0 nM).

GGFG-PAB-Exatecan TFA consists of an ADC toxin Exatecan-induced allodynia and in PGE2-induced mechanical hyperalgesia. AD353 exhibits a favorable pharmacokinetic profile.

Fostriecin is a triene antibiotic. Fostriecin is a topoisomerase II and protein phosphatase PP2A inhibitor.

AuL1 is an inhibitor of topoisomerase IIα (Top II) with DNA-intercalating properties. AuL1 is cytotoxic to tumor cells and can be used in the research of anticancer agents.

Amrubicin (SM-5887) hydrochloride is a DNA topoisomerase II inhibitor, used for the research of cancer.

8-Chloro-ATP tetrasodium, an ATP analog, is a topoisomerase II (Topo II) inhibitor. 8-Chloro-ATP tetrasodium inhibits DNA synthesis and induces DNA double-stranded breaks (DSBs). 8-Chloro-ATP tetrasodium inhibits Topo II-catalyzed ATP hydrolysis.

8-Chloro-ATP, an ATP analog, is a topoisomerase II (Topo II) inhibitor. 8-Chloro-ATP inhibits DNA synthesis and induces DNA double-stranded breaks (DSBs). 8-Chloro-ATP inhibits Topo II-catalyzed ATP hydrolysis.

(R)-Sitafloxacin (DU-6857), a stereoisomer of Sitafloxacin (DU-6859a), is also an inhibitor of topoisomerases, with an IC50 of 0.18 μg/mL of DNA gyrase.

Epirubicin HCl, a semisynthetic L-arabino derivative of doxorubicin, is an antineoplastic agent by inhibiting Topoisomerase.