1. Cell Cycle/DNA Damage
  2. Polo-like Kinase (PLK)
  3. Ro3280

Ro3280 is a potent, highly selective inhibitor of PLK1 with an IC50 and a Kd of 3 nM and 0.09 nM, respectively, and nearly has no effect on PLK2 and PLK3.

For research use only. We do not sell to patients.

Ro3280 Chemical Structure

Ro3280 Chemical Structure

CAS No. : 1062243-51-9

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
USD 167 In-stock
Solution
10 mM * 1 mL in DMSO USD 167 In-stock
Solid
2 mg USD 90 In-stock
5 mg USD 140 In-stock
10 mg USD 251 In-stock
25 mg USD 500 In-stock
50 mg USD 850 In-stock
100 mg   Get quote  
200 mg   Get quote  

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This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 4 publication(s) in Google Scholar

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  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

Ro3280 is a potent, highly selective inhibitor of PLK1 with an IC50 and a Kd of 3 nM and 0.09 nM, respectively, and nearly has no effect on PLK2 and PLK3.

IC50 & Target[2]

PLK1

0.09 nM (Kd)

ALK

230 nM (Kd)

CAMKK1

1100 nM (Kd)

CAMKK2

87 nM (Kd)

DAPK1

100 nM (Kd)

DAPK3

70 nM (Kd)

FER

53 nM (Kd)

GAK

87 nM (Kd)

MYLK

170 nM (Kd)

PTK2

84 nM (Kd)

PTK2B

130 nM (Kd)

RPS6KA6 (KinDom.2)

560 nM (Kd)

TTK

51 nM (Kd)

In Vitro

Ro3280 (RO3280) inhibits PLK1 activity in NB4 and K562 cells, with an IC50s of 13.45 nM and 301 nM, respectively. RO3280 shows inhibitory activities against the growth of six leukemia cells, with IC50s of 186 nM, 175 nM, 74 nM, 797 nM, 120 nM and 162 nM for U937, HL60, NB4, K562, MV4-11 and CCRF cell lines, respectively. RO3280 also suppresses the growth of primary ALL and AML cells, with IC50s of 35.49-110.76 nM, and 52.80-147.50 nM, respectively. RO3280 (50 or 100 nM) induces apoptosis and cell cycle disorder in acute leukemia cells[1]. Ro3280 shows potent activity in H82, H69, A549 lung cancer cell lines with EC50s of 6 nM, 7 nM and 82 nM. Ro3280 also inhibits several other cancer cell lines, with low concentration[2]. RO3280 is cytotoxic to 5637 and T24 human bladder cancer cells, with IC50s of appr 100 nM.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

Ro3280 (RO3280, 40 mg/kg, i.v.) inhibits 72% tumor growth in a mouse xenograft model implanted with HT-29 colorectal cancer cells, and when dosed more frequently, RO3280 completely suppresses the tumor growth[2].
RO3280 (30 mg/kg, once every 5 days, i.p.) shows significant anti-bladder cancer activities in a nude mouse model[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight

543.61

Formula

C27H35F2N7O3

CAS No.
Appearance

Solid

Color

Off-white to yellow

SMILES

COC1=C(NC2=NC(N(C3CCCC3)CC(F)(F)C(N4C)=O)=C4C=N2)C=CC(C(NC5CCN(C)CC5)=O)=C1

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : 100 mg/mL (183.96 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.8396 mL 9.1978 mL 18.3955 mL
5 mM 0.3679 mL 1.8396 mL 3.6791 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (4.60 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: 2.5 mg/mL (4.60 mM); Suspended solution; Need ultrasonic

    This protocol yields a suspended solution of 2.5 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation

Purity: 98.87%

References
Cell Assay
[1]

Leukemia cells or primary leukemia cells (2 × 104) are seeded in 96-well plates overnight and incubated with DMSO, or increasing concentrations of RO3280 (0.05-120 μM) for 24 h. The same volume of DMSO added to the vehicle treated wells. Each drug concentration is replicated four times. Then, 10 μL CCK8 solution is added to each well, incubated at 37°C for 2-4 h and the optical density (OD) values are measured at 450 nm using a scanning multi-well spectrophotometer. Relative survival rate is calculated from the absorbance values compared with the control group. The proliferation of cells is calculated as a percentage of the DMSO-treated control wells with 50% inhibitory concentration (IC50) values derived after plotting proliferation values on a logarithmic curve. The IC50 of PLK1 inhibitor is calculated by Graph Prism software[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration
[3]

Briefly, mice (female, 4-5 weeks of age) are used in the assay. Cells (5 × 106 cells in 150 μL) are suspended in RPMI 1640 and injected subcutaneously into the flank of each BALB/c nude mouse. On day 5, tumour size is measured, the animals are randomized into two groups (n = 15 per group), and RO3280 (40 mg/kg, once every 5 days) treatment is initiated by intraperitoneal injection. The control group is treated with vehicle (1.5% DMSO in PBS). The drug (or vehicle) treatment is performed for 40 days. The length and width of the resulting tumours (in millimetres) are measured every 3 days with callipers. The tumour diameter is measured, and the volume (length × width2 × 0.52) is calculated. The mice are humanely killed on day 45, and the tumours are dissected and weighed. Western blot and immunohistochemistry assays are also performed with these sections. Then, the tumours are fixed, embedded and cut into 3‐μm‐thick sections, which are subsequently stained with haematoxylin and eosin to permit the observation of the tumour margin[3].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 1.8396 mL 9.1978 mL 18.3955 mL 45.9889 mL
5 mM 0.3679 mL 1.8396 mL 3.6791 mL 9.1978 mL
10 mM 0.1840 mL 0.9198 mL 1.8396 mL 4.5989 mL
15 mM 0.1226 mL 0.6132 mL 1.2264 mL 3.0659 mL
20 mM 0.0920 mL 0.4599 mL 0.9198 mL 2.2994 mL
25 mM 0.0736 mL 0.3679 mL 0.7358 mL 1.8396 mL
30 mM 0.0613 mL 0.3066 mL 0.6132 mL 1.5330 mL
40 mM 0.0460 mL 0.2299 mL 0.4599 mL 1.1497 mL
50 mM 0.0368 mL 0.1840 mL 0.3679 mL 0.9198 mL
60 mM 0.0307 mL 0.1533 mL 0.3066 mL 0.7665 mL
80 mM 0.0230 mL 0.1150 mL 0.2299 mL 0.5749 mL
100 mM 0.0184 mL 0.0920 mL 0.1840 mL 0.4599 mL
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Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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