1. Cell Cycle/DNA Damage
  2. Checkpoint Kinase (Chk)
  3. Prexasertib dihydrochloride

Prexasertib dihydrochloride (Synonyms: LY2606368 dihydrochloride)

目录号: HY-18174A 纯度: 99.41%

Prexasertib dihydrochloride (LY2606368 dihydrochloride) 是一种选择性的,ATP 竞争性的第二代细胞周期检测点激酶 1 (CHK1) 抑制剂,Ki 为 0.9 nM,IC50 为 <1 nM。Prexasertib dihydrochloride 抑制 CHK2 (IC50=8 nM) 和 RSK1 (IC50=9 nM)。Prexasertib dihydrochloride 引起双链 DNA 断裂和复制突变,导致细胞凋亡 (apoptosis)。Prexasertib dihydrochloride 显示有效的抗肿瘤活性。

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Prexasertib dihydrochloride Chemical Structure

Prexasertib dihydrochloride Chemical Structure

CAS No. : 1234015-54-3

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Prexasertib dihydrochloride (LY2606368 dihydrochloride) is a selective, ATP-competitive second-generation checkpoint kinase 1 (CHK1) inhibitor with a Ki of 0.9 nM and an IC50 of <1 nM. Prexasertib dihydrochloride inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib dihydrochloride causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib dihydrochloride shows potent anti-tumor activity[1][2].

IC50 & Target[1]


0.9 nM (Ki)


<1 nM (IC50)


8 nM (IC50)

In Vitro

Prexasertib dihydrochloride (LY2606368 dihydrochloride) inhibits MELK (IC50=38 nM), SIK (IC50=42 nM), BRSK2 (IC50=48 nM), ARK5 (IC50=64 nM). LY2606368 requires CDC25A and CDK2 to cause DNA damage[1].
Prexasertib dihydrochloride (33, 100 nM; for 7 hours) results in DNA damage during S-phase in HeLa cells[1].
Prexasertib dihydrochloride (8-250 nM; pre-treated for 15 minutes) inhibits CHK1 autophosphorylation (S296) and CHK2 autophosphorylation (S516) in HT-29 cells[1].
Prexasertib dihydrochloride (4 nM; 24 hours) results in a large shift in cell-cycle populations from G1 and G2-M to S-phase with an accompanied induction of H2AX phosphorylation in U-2 OS cells[1].
Prexasertib dihydrochloride (33 nM; for 12 hours) causes chromosomal fragmentation in HeLa cells. Prexasertib (100 nM; 0.5 to 9 hours) induces replication stress and depletes the pool of available RPA2 for binding to DNA[1].

Cell Cycle Analysis[1]

Cell Line: HeLa cells
Concentration: 33, 100 nM
Incubation Time: For 7 hours
Result: Had an IC50 of 37 nM and resulted in the G2-M population received DNA damage during S-phase but continued to progress through the cell cycle into an early mitosis.

Western Blot Analysis[1]

Cell Line: HT-29 cells
Concentration: 8, 16, 31, 63, 125, 250 nM
Incubation Time: Pre-treated for 15 minutes
Result: Inhibited CHK1 autophosphorylation (S296) and CHK2 autophosphorylation (S516) (IC50 of less than 31 nM) in HT-29 cells.
In Vivo

Prexasertib dihydrochloride (LY2606368 dihydrochloride; 1-10 mg/kg; SC; twice daily for 3 days, rest 4 days; for three cycles; for 64 days) causes growth inhibition in tumor xenografts[1].
Prexasertib dihydrochloride (15 mg/kg; SC) causes CHK1 inhibition in the blood and the phosphorylation of both H2AX (S139) and RPA2 (S4/S8)[1].

Animal Model: Female CD-1 nu-/nu- mice (26-28 g) with Calu-6 cells[1]
Dosage: 1, 3.3, or 10 mg/kg
Administration: SC; twice daily for 3 days, rest 4 days; for three cycles (for 64 days)
Result: Caused statistically significant tumor growth inhibition (up to 72.3%).
Animal Model: Female CD-1 nu-/nu- mice (26-28 g) with Calu-6 cells[1]
Dosage: 15 mg/kg (Pharmacokinetic Analysis)
Administration: SC (200 μL)
Result: CHK1 is 7 ng/mL at 12 hours and 3 ng/mL by 24 hours in plasma exposures.
Phosphorylation of both H2AX (S139) and RPA2 (S4/S8) was detectable at 4 hours, showing the rapid occurrence of DNA damage.
Clinical Trial
Molecular Weight









Room temperature in continental US; may vary elsewhere.


4°C, stored under nitrogen, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen, away from moisture)

Solvent & Solubility
In Vitro: 

DMSO : 8.33 mg/mL (19.00 mM; Need ultrasonic)

H2O : < 0.1 mg/mL (insoluble)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.2815 mL 11.4075 mL 22.8149 mL
5 mM 0.4563 mL 2.2815 mL 4.5630 mL
10 mM 0.2281 mL 1.1407 mL 2.2815 mL

储备液的保存方式和期限:-80°C, 6 months; -20°C, 1 month (stored under nitrogen, away from moisture)。 -80°C 储存时,请在 6 个月内使用,-20°C 储存时,请在 1 个月内使用。


Purity: 99.41%

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PrexasertibLY2606368LY 2606368LY-2606368Checkpoint Kinase (Chk)ApoptosisATP-competitiveRSK1double-strandedDNAreplicationMELKSIKBRSK2ARK5CDC25ACDK2HeLaautophosphorylationS296S516H2AXHT-29Inhibitorinhibitorinhibit


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Prexasertib dihydrochloride