CDK4
CDK4 is a cyclin-dependent serine/threonine kinase that partners with D-type cyclins to drive G1-phase progression before DNA synthesis[1]. Mechanistically, cyclin D-CDK4/6 phosphorylates RB, weakens RB-dependent transcriptional repression, and enables late-G1 signaling toward E2F-linked S-phase entry[2]. In cancer models, disruption of the CDK-RB1-E2F pathway supports malignant proliferation, and HR^+/HER2^- breast cancer provides a clinically established setting for CDK4/6 inhibition[3]. Compared with related isoforms, CDK4 and CDK6 share cell-cycle functions, but CDK4 is described as a prominent oncogenic driver in breast cancer, whereas CDK6 has a crucial role in hematopoietic stem-cell differentiation[3][4]. For experimental and translational applications, palbociclib, ribociclib, and abemaciclib inhibit CDK4/6, reduce RB phosphorylation, induce G1 arrest, and support endocrine-therapy combinations in HR^+/HER2^- advanced breast cancer studies[3][5][6][7].
References:
- [1]. Baker SJ, et al. CDK4: a master regulator of the cell cycle and its role in cancer. Genes Cancer. 2022 Aug 25;13:21-45. [Content Brief]
- [2]. Harbour JW, et al. Cdk phosphorylation triggers sequential intramolecular interactions that progressively block Rb functions as cells move through G1. Cell. 1999 Sep 17;98(6):859-69. [Content Brief]
- [3]. Braal CL, et al. Inhibiting CDK4/6 in Breast Cancer with Palbociclib, Ribociclib, and Abemaciclib: Similarities and Differences. Drugs. 2021 Feb;81(3):317-331. [Content Brief]
- [4]. Fassl A, et al. CDK4 and CDK6 kinases: From basic science to cancer therapy. Science. 2022 Jan 14;375(6577):eabc1495. [Content Brief]
- [5]. Finn RS, et al. Palbociclib and Letrozole in Advanced Breast Cancer. N Engl J Med. 2016 Nov 17;375(20):1925-1936. [Content Brief]
- [6]. Hortobagyi GN, et al. Ribociclib as First-Line Therapy for HR-Positive, Advanced Breast Cancer. N Engl J Med. 2016 Nov 3;375(18):1738-1748. [Content Brief]
- [7]. Goetz MP, et al. MONARCH 3: Abemaciclib As Initial Therapy for Advanced Breast Cancer. J Clin Oncol. 2017 Nov 10;35(32):3638-3646. [Content Brief]
All Product Categories
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CDK4 Related Products (229)
Related Products (229)
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Recombinant Proteins (5)
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Antibodies (2)
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Rafutrombopag (tautomerism)
0 ImagesSynonyms: Hetrombopag (tautomerism); SHR-8735 (tautomerism)Rafutrombopag (tautomerism) (Hetrombopag) is an orally active nonpeptide thrombopoietin receptor (TPOR/MPL) agonist. Rafutrombopag can chelate iron and alleviate iron overload while promoting haematopoiesis. Rafutrombopag specifically stimulates proliferation and differentiation of human TPOR‐expressing cells, including 32D‐ MPL and human hematopoietic stem cells through stimulation of STAT, PI3K and ERK signalling pathways. Rafutrombopag effectively up-regulates G1-phase-related proteins, including p-RB, Cyclin D1 and CDK4/6, normalizes progression of the cell cycle, and prevents apoptosis by modulating BCL-XL/BAK expression in 32D-MPL cells. Rafutrombopag protects cardiomyocyte survival from oxidative stress damage as an enhancer of stem cells. Rafutrombopag can be used for the study of immune thrombocytopenia and oxidative stress-related cardiovascular disease.
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RGB-286638
0 ImagesRGB-286638 is a potent inhibitor of CDK and MAPK9. RGB-286638 inhibits the activities of cyclin T1-CDK9, cyclin B1-CDK1, cyclin E-CDK2, cyclin D1-CDK4, cyclin E-CDK3 and p35-CDK5, with IC50 values of 1, 2, 3, 4, 5 and 5 nM, respectively. RGB-286638 inhibits GSK-3β and TAK1, with IC50 values of 3 nM and 5 nM, respectively. RGB-286638 induces caspase-dependent Apoptosis in cells. RGB-286638 delays tumor growth in an orthotopic glioblastoma mouse model. RGB-286638 extends survival in multiple myeloma models. RGB-286638 can be used in research related to glioblastoma and multiple myeloma.
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CGP60474
0 ImagesCGP60474, a highly potent anti-endotoxemic agent, is a potent cyclin-dependent kinase (CDK) inhibitor (IC50 values are 26, 3, 4, 216, 10, 200 and 13 nM for CDK1/B, CDK2/E, CDK2/A, CDK4/D, CDK5/p25, CDK7/H and CDK9/T, respectively). CGP60474 is a selective and ATP-competitive PKC inhibitor.
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Asnuciclib
0 ImagesSynonyms: CDKI-73; LS-007Asnuciclib (CDKI-73; LS-007) is an orally active and highly efficacious CDK9 inhibitor, with Ki values of 4 nM, 4 nM and 3 nM for CDK9, CDK1 and CDK2, respectively. Asnuciclib down-regulates the RNAPII phosphorylation. Asnuciclib is also a novel pharmacological inhibitor of Rab11 cargo delivery and innate immune secretion.
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Narazaciclib
0 ImagesSynonyms: ON123300Narazaciclib (ON123300), a strong and brain-penetrant multi-kinase inhibitor, inhibits CDK4 (IC50=3.9 nM), Ark5 (IC50=5 nM), PDGFRβ (IC50=26 nM), FGFR1 (IC50=26 nM), RET (IC50=9.2 nM), and FYN (IC50=11 nM). Single agent Narazaciclib causes a dose-dependent suppression of phosphorylation of Akt as well as activation of Erk in brain tumors. Narazaciclib inhibits CDK6 with an IC50 of 9.82 nM.
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Alisol B 23-acetate
0 ImagesSynonyms: 23-Acetylalismol B; 23-O-Acetylalisol B; Alisol B monoacetateAlisol B 23-acetate is an orally active prototerpane-type triterpenoid. Alisol B 23-acetate can be isolated from Alisma orientalis. Alisol B 23-acetate induces Apoptosis, promotes ROS generation, downregulates CDK4/6, MMP-2/9, upregulates cleaved PARP, activates FXR and inhibits Syk. Alisol B 23-acetate has anti-inflammatory and hepatoprotective activities. Alisol B 23-acetate protects the kidney from ischemia-reperfusion injury. Alisol B 23-acetate has anticancer activity against ovarian cancer, colon cancer, lung cancer, and gastric cancer. Alisol B 23-acetate can be used in the study of atherosclerosis and allergic asthma.
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Abemaciclib metabolite M2
0 ImagesSynonyms: LSN2839567
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Samuraciclib
0 ImagesSynonyms: CT7001; ICEC0942Samuraciclib (CT7001) is a potent, selective, ATP-competitive and orally active CDK7 inhibitor, with an IC50 of 41 nM. Samuraciclib displays 45-, 15-, 230- and 30-fold selectivity over CDK1, CDK2 (IC50 of 578 nM), CDK5 and CDK9, respectively. Samuraciclib inhibits the growth of breast cancer cell lines with GI50 values between 0.2-0.3 μM. Samuraciclib has anti-tumor effects.
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Abemaciclib metabolite M18 hydrochloride
0 ImagesSynonyms: LSN3106729 hydrochlorideAbemaciclib metabolite M18 (LSN3106729) hydrochloride, the metabolite of Abemaciclib (HY-16297A), is a CDK inhibitor with antitumor activity. Abemaciclib metabolite M18 hydrochloride and a CRBN ligand have been used to design PROTAC CDK4/6 degrader.
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Riviciclib hydrochloride
0 ImagesSynonyms: P276-00Riviciclib hydrochloride (P276-00) is a potent cyclin-dependent kinase (CDK) inhibitor, which inhibits CDK9-cyclinT1, CDK4-cyclin D1, and CDK1-cyclinB with IC50s of 20 nM, 63 nM, and 79 nM, respectively. Riviciclib hydrochloride (P276-00) shows antitumor activity on cisplatin-resistant cells.
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PROTAC CDK4/6 degrader 1
0 ImagesPROTAC CDK4/6 degrader 1 is a CDK4/CDK6 PROTAC degrader, with DC50 values of 10.5 nM and 2.5 nM, respectively. PROTAC CDK4/6 degrader 1 inhibits the proliferation of Jurkat cells (IC50 = 0.18 μM), arrests the cell cycle at the G1 phase, and induces apoptosis. PROTAC CDK4/6 degrader 1 can be used for cancer research.
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FN-1501
0 ImagesSynonyms: LT-171-861FN-1501 is a potent inhibitor of FLT3 and CDK, with IC50s of 2.47, 0.85, 1.96, and 0.28 nM for CDK2/cyclin A, CDK4/cyclin D1, CDK6/cyclin D1 and FLT3, respectively. FN-1501 has anticancer activity.
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Lerociclib dihydrochloride
0 ImagesSynonyms: G1T38 dihydrochloride
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Lerociclib
0 ImagesSynonyms: G1T38Lerociclib (G1T38) is a potent and selective inhibitor of CDK4/6, with IC50s of 1 nM, 2 nM for CDK4/CyclinD1 and CDK6/CyclinD3, respectively.
