Topo I Inhibitor

Doxorubicin hydrochloride (Hydroxydaunorubicin hydrochloride; ADR), a cytotoxic anthracycline antibiotic, is an anti-cancer chemotherapy agent. Doxorubicin hydrochloride is a potent human DNA topoisomerase I and topoisomerase II inhibitor with IC₅₀s of 0.8 μM and 2.67 μM, respectively. Doxorubicin hydrochloride reduces basal phosphorylation of AMPK and its downstream target acetyl-CoA carboxylase. Doxorubicin hydrochloride induces apoptosis and autophagy.

DXd (Exatecan derivative for ADC) is a potent DNA topoisomerase I inhibitor, with an IC₅₀ of 0.31 μM, used as a conjugated drug of HER2-targeting ADC (DS-8201a).

SN-38 is an active metabolite of the Topoisomerase I inhibitor Irinotecan. SN-38 can bind to RPL15. SN-38 inhibits DNA and RNA synthesis with IC₅₀s of 0.077 and 1.3 μM, respectively. SN-38 is a payload of sacituzumab govitecan (HY -132254).

Irinotecan ((+)-Irinotecan) is a topoisomerase I inhibitor, preventing religation of the DNA strand by binding to topoisomerase I-DNA complex.

Camptothecin (CPT), a kind of alkaloid, is a DNA topoisomerase I (Topo I) inhibitor with an IC₅₀ of 679 nM. Camptothecin (CPT) exhibits powerful antineoplastic activity against colorectal, breast, lung and ovarian cancers, modulates hypoxia-inducible factor-1α (HIF-1α) activity by changing microRNAs (miRNA) expression patterns in human cancer cells.

Datopotamab deruxtecan (DS-1062) solution is a TROP2-targeted antibody-drug conjugate (ADC) with human TROP2 K_d of 0.74 nmol/L. Datopotamab deruxtecan solution consists of the antibody Datopotamab (HY-P99843) and the toxic molecule-linker conjugate Deruxtecan (HY-13631E). Datopotamab deruxtecan solution binds TROP2, triggers internalization and lysosomal trafficking and releases DXd topoisomerase I inhibitor payload. Datopotamab deruxtecan solution disrupts DNA function, induces DNA damage, apoptosis, and bystander killing of tumor microenvironment cells. Datopotamab deruxtecan solution can be used in research related to triple-negative breast cancer, gastric cancer, and non-small cell lung cancer.

BL-B01D1 (Izalontamab Brengitecan) is a bispecific antibody-drug conjugate (ADC) targeting EGFR and HER3, formed by conjugating the EGFR/HER3 bispecific antibody Izalontamab (HY-P99676) to a novel TOP-I inhibitor payload Deruxtecan 2-hydroxypropanamide (HY-153891) via a cleavable linker (Mc-Gly-Gly-Phe-Gly). BL-B01D1 binds to EGFR and HER3 on the surface of tumor cells, mediates endocytosis and releases the payload, inhibits topoisomerase I, blocks DNA replication and RNA synthesis, and disrupts DNA structure. BL-B01D1 induces cell cycle S-phase arrest, apoptosis, antibody-dependent cell-mediated cytotoxicity, and tumor cell death. BL-B01D1 can be used for cancer research.

Puxitatug samrotecan (AZD 8205) is an antibody-drug conjugate (ADC) targeting B7-H4, formed by the random conjugation of the Puxitatug (HY-P990059) antibody and AZ14170133 (HY-145399) via interchain cysteine reduction. Puxitatug samrotecan binds to B7-H4 to deliver the payload to B7-H4-expressing cells, inhibits topoisomerase I, and induces cytotoxicity in cancer cells and xenograft models. Puxitatug samrotecan can be used in studies of B7-H4-expressing tumors.

Topotecan Hydrochloride (SKF 104864A Hydrochloride) is a Topoisomerase I inhibitor with potent antineoplastic activities.

Irinotecan hydrochloride ((+)-Irinotecan hydrochloride) is a topoisomerase I inhibitor mainly used to treat colon cancer and rectal cancer.

Ifinatamab deruxtecan (DS-7300a) is a B7-H3-targeting Antibody-drug conjugate (ADC), which is composed of a humanized anti-B7-H3 monoclonal antibody, an enzymatically cleavable peptide-based linker, and Exatecan derivative (DXd) (HY-13631D). Ifinatamab deruxtecan is a DNA Topoisomerase I inhibitor. Ifinatamab deruxtecan induces Apoptosis. DS-7300a exerts potent antitumor activities against B7-H3-expressing tumors. against rhabdomyosarcoma, endometrial adenocarcinoma and lung adenocarcinoma. Ifinatamab deruxtecan does not exert direct immunomodulatory effects

Betulinic acid is a natural pentacyclic triterpenoid, acts as a eukaryotic topoisomerase I inhibitor, with an IC₅₀ of 5 μM, and possesses anti-HIV, anti-malarial, anti-inflammatory and anti-tumor properties. Betulinic acid can cross the blood-brain barrier.

β-Lapachone (ARQ-501;NSC-26326) is a naturally occurring O-naphthoquinone, acts as a topoisomerase I inhibitor, and induces apoptosis by inhibiting cell cycle progression.

DXd-d₅ is a deuterium labeled DXd. DXd is a potent DNA topoisomerase I inhibitor, with an IC₅₀ of 0.31 μM, used as a conjugated drug of HER2-targeting ADC (DS-8201a) .

Telisotuzumab Adizutecan (ABBV-400) is an anti-c-Met antibody-drug conjugate (ADC). Telisotuzumab Adizutecan is composed of the humanized anti-c-Met antibody Telisotuzumab (HY-P99391) and the topoisomerase 1 inhibitor (7-MAD-MDCPT) (HY-132162). Telisotuzumab Adizutecan exhibits significant anti-tumor activity against advanced solid tumors such as colorectal cancer, gastric cancer, and non-small cell lung cancer.

PNU-159682, a metabolite of the anthracycline Nemorubicin, is a highly potent DNA topoisomerase II inhibitor with excellent cytotoxicity. PNU-159682 acts as a more potent and tolerated ADC cytotoxin than Doxorubicin for ADC synthesis. PNU-159682 can be used in EDV-nanocell technology to overcome agent resistance.

Irinotecan hydrochloride trihydrate ((+)-Irinotecan hydrochloride trihydrate) is a topoisomerase I inhibitor with antitumor activity.

Aclacinomycin A (Aclarubicin) is an orally active and potent anthracycline antitumor antibiotic. Aclacinomycin A is an inhibitor of topoisomerase I and II. Aclacinomycin A inhibits synthesis of nucleic acid, especially RNA. Aclacinomycin A might inhibit the 26S protease complex as well as the ubiquitin-ATP-dependent proteolysis.

Precemtabart tocentecan (Precem-TcT; M 9140) is an anti-CEACAM5 (carcinoembryonic antigen-related cell adhesion molecule 5) antibody-drug conjugate (ADC). Precemtabart tocentecan consists of a tumor-specific anti-CEACAM5 monoclonal antibody Precemtabart (HY-P990940), a highly hydrophilic and stable cleavable β-glucuronide linker, and a topoisomerase 1 inhibitor payload Exatecan (HY-13631), and the drug-linker conjugate for ADC is Mal-Gly-PAB-Exatecan-D-glucuronic acid (HY-153179). Precemtabart tocentecan inhibits the growth of CEACAM5-positive cancer cells. Precemtabart tocentecan exhibits significant antitumor activity in CEACAM5-expressing xenograft models. Precemtabart tocentecan can be used for the study of CEACAM5-expressing advanced solid tumors, especially mCRC.

Belotecan hydrochloride (CKD-602 hydrochloride), a Topoisomerase I inhibitor, is a synthetic camptothecin derivative.