Ganoderenic acid B
Ganoderenic acid B can enhance the cytotoxicity of chemotherapeutics towards ABCB1-mediated MDR cancer cells via inhibition of the transport function of ABCB1.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months(2-8C)
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Ganoderma lucidum derived ganoderenic acid B reverses ABCB1-mediated multidrug resistance in HepG2/ADM cells.[Pubmed: 25779097
Chemotherapy is one of the most common therapeutic option for metastatic tumors and hematological malignancies. ABCB1-mediated multidrug resistance is the major obstacle for chemotherapy. Natural products with diversified structures are ideal source of ABCB1 modulators.
METHODS AND RESULTS:
Ganoderenic acid B, a lanostane-type triterpene isolated from Ganoderma lucidum, exhibited potent reversal effect on ABCB1-mediated multidrug resistance of HepG2/ADM cells to doxorubicin, vincristine and paclitaxel. Similarly, Ganoderenic acid B could also significantly reverse the resistance of ABCB1-overexpressing MCF-7/ADR cells to doxorubicin. Furthermore, Ganoderenic acid B notably enhanced intracellular accumulation of rhodamine-123 in HepG2/ADM cells through inhibition of its efflux. ABCB1 siRNA interference assay indicated that the reversal activity of Ganoderenic acid B was dependent on ABCB1. Further mechanistic investigations found that Ganoderenic acid B did not alter the expression level of ABCB1 and the activity of ABCB1 ATPase. Molecular docking model displayed that the positions of Ganoderenic acid B binding to ABCB1 were different from the region of verapamil interacted with ABCB1.
Collectively, Ganoderenic acid B can enhance the cytotoxicity of chemotherapeutics towards ABCB1-mediated MDR cancer cells via inhibition of the transport function of ABCB1. These findings provide evidence that Ganoderenic acid B has the potential to be developed into an ABCB1-mediated multidrug resistance reversal agent.
Zhongguo Zhong Yao Za Zhi. 2016 Mar;41(6):1075-1080.
Triterpenoids from Ganoderma theaecolum.[Pubmed: 28875673
METHODS AND RESULTS:
Fifteenlanostane triterpenoids were isolated from the ethanol extract of Ganoderma theaecolum by means of preparative HPLC,column chromatography over silica gel,ODS and were identified as lucidone C(1),lucidone D(2),7-oxo-ganoderic acid Z2(3),7-oxo-ganoderic acid Z(4),ganoderenicacid H(5),Ganoderenic acid B(6),3β,7β-dihydroyl-11,15,23-trioxo-lanost-8,16-dien-26-oic acid(7),3β,7β-dihydroyl-11,15,23-trioxo-lanost-8,16-dien-26-oic acid methyl ester(8),ganolucidic acid B(9),ganolucidate F(10),methyl ganoderate C2(11),ganoderic acid ζ(12),ganoderic acid AP3(13),methyl ganoderate B(14),and ganoderol B(15).
Compounds 1-15 were isolated from this specie for the first time.