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  2. Brassinolide

Brassinolide (Synonyms: Brassin lactone)

Cat. No.: HY-N0273 Purity: >98.0%
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Brassinolide is a predominant plant growth modulator that regulate plant cell elongation.

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Brassinolide Chemical Structure

Brassinolide Chemical Structure

CAS No. : 72962-43-7

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10 mM * 1 mL in DMSO USD 79 In-stock
Estimated Time of Arrival: December 31
5 mg USD 72 In-stock
Estimated Time of Arrival: December 31
10 mg USD 108 In-stock
Estimated Time of Arrival: December 31
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Brassinolide is a predominant plant growth modulator that regulate plant cell elongation.

IC50 & Target

plant growth modulator[1]

In Vitro

Brassinolide is a plant sterol first isolated from pollen of rape (Brassica napus L.). Brassinolide can induce a time and concentration-dependent cytotoxicity in PC-3 cells. The mode of cell death appears to be predominately apoptosis, as shown by flow-cytometric analysis, fluorescence and transmission electron microscopes. Caspase-3 activity is obviously increased after Brassinolide treatment. Western blot studies indicate that treatment with Brassinolide triggered a time-dependent decrease in the expression of anti-apoptotic protein Bcl-2, which suggests that Brassinolide can induce cytotoxicity in PC-3 cells by triggering apoptosis. Brassinolide might therefore be a promising candidate for the treatment of prostate cancer[1]. Brassinolide is a plant growth modulator, on multidrug resistance (MDR) of human T lymphoblastoid cell line CCRF-VCR 1000 which is obtained by progressively addition of vincristine (VCR) to sensitive CCRF-CEM cells, and to explore preliminarily the mechanism of reversing action. After treatment of Brassinolide under the concentration of 0.001-10 μg/mL, the resistance of CCRF-VCR is reversed partly with the reversing folds respectively as 4.4-11.6. The intracellular accumulation of rhodamine 123 is significantly reduced in the resistant cells. After treatment of Brassinolide, the accumulation increased, the level of fluorescent dye is situated between resistant cells and sensitive cells. No alteration of the catalytic activity of topoisomerase II is found among three groups. The level of protein expression of p53 in resistant cells is higher than that of sensitive cells. After Brassinolide treatment, the expression of p53 in CCRF-VCR cells restored to the level of sensitive cells. Brassinolide can effectively reverse the resistance of CCRF-VCR cells by inhibiting the effusion of drug transported by P-glucoprotein. To down regulate the abnormal expression of p53 maybe one of the mechanisms of reversing MDR for Brassinolide[2].

Molecular Weight







Room temperature in continental US; may vary elsewhere

Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : ≥ 5.2 mg/mL (10.82 mM)

*"≥" means soluble, but saturation unknown.

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.0804 mL 10.4019 mL 20.8039 mL
5 mM 0.4161 mL 2.0804 mL 4.1608 mL
10 mM 0.2080 mL 1.0402 mL 2.0804 mL
*Please refer to the solubility information to select the appropriate solvent.
Cell Assay

MTT method is used to detect the resistant factor of resistant cell line and the reversing fold after addition of Brassinolide. The intracellular accumulation of rhodamine 123, a fluorescent dye transported by P-glycoprotein is detected by flow cytometry, the catalytic activity of topoisomerase II is assessed by Sulliven method to find the effect of Brassinolide on resistance. The protein expression of p53 is measured using Western blotting in the sensitive cells and resistant cells to explore the effect of Brassinolide[2].

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

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