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Chemical Structure| 82508-31-4 Chemical Structure| 82508-31-4

Structure of Pseudolaric Acid B
CAS No.: 82508-31-4

Chemical Structure| 82508-31-4

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Pseudolaric Acid B is a diterpene isolated from the root of Pseudolarix kaempferi Gorden (pinaceae), has anti-cancer, antifungal, and antifertile activities, and shows immunosuppressive activity on T lymphocytes[1][2][3]. Pseudolaric Acid B inhibits hepatitis B virus (HBV) secretion through apoptosis and cell cycle arrest. Pseudolaric Acid B induces autophagy[4][5].

Synonyms: NSC 615488; PAB; (-)-Pseudolaric acid B

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Product Details of Pseudolaric Acid B

CAS No. :82508-31-4
Formula : C23H28O8
M.W : 432.46
SMILES Code : O=C(O)/C(C)=C/C=C/[C@](O1)(C)[C@@]2([H])[C@](CCC(C(OC)=O)=CC3)(OC(C)=O)[C@]3(CC2)C1=O
Synonyms :
NSC 615488; PAB; (-)-Pseudolaric acid B
MDL No. :MFCD01746346

Safety of Pseudolaric Acid B

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H301-H361
Precautionary Statements:P281-P301+P310
Class:6.1
UN#:2811
Packing Group:

Isoform Comparison

Biological Activity

In Vitro:

Cell Line
Concentration Treated Time Description References
HUVEC cells 0.5, 2, 5, 10 μM 24 h PAB inhibited angiogenesis of HUVEC cells Drug Des Devel Ther. 2020 Oct 28;14:4561-4573.
Human normal renal cells (HK-2) 0.2-80 μg/ml 48 h To evaluate the cytotoxicity of PAB on normal renal cells, results showed the IC50 of PAB was 42.94 μg/ml, with no significant difference compared to albendazole (21.22 μg/ml) Front Microbiol. 2022 Nov 11;13:1008274.
Human normal hepatocytes (HL-7702) 0.2-80 μg/ml 48 h To evaluate the cytotoxicity of PAB on normal hepatocytes, results showed the IC50 of PAB was 25.29 μg/ml, significantly higher than that of albendazole (3.71 μg/ml), indicating lower toxicity of PAB to hepatocytes Front Microbiol. 2022 Nov 11;13:1008274.
Echinococcus multilocularis microcysts 20 μg/ml and 40 μg/ml 4 weeks To assess the inhibitory effect of PAB on microcyst development, results showed PAB caused structural damage to microcysts, including collapse and detachment of the germinal layer from the laminated layer, and significantly increased ALP activity in the culture supernatant Front Microbiol. 2022 Nov 11;13:1008274.
Echinococcus multilocularis protoscoleces 20 μg/ml 2 days To evaluate the insecticidal effect of PAB on protoscoleces, results showed PAB significantly reduced the survival rate and caused ultrastructural damage, such as shedding of tegument, breakage of rostellum and suckers Front Microbiol. 2022 Nov 11;13:1008274.
MDA-MB-231 cells 5.0 µM PAB significantly inhibited the viability of MDA-MB-231 cells and increased intracellular ferrous iron and lipid ROS levels Cell Death Dis. 2022 Jun 20;13(6):557.
H1299 cells 20 µM 1 to 4 days PAB induced apoptosis instead of senescence in H1299 cells, indicating p53-null status alters cell fate. Acta Pharmacol Sin. 2016 Jul;37(7):919-29.
H460 cells 20 µM 1 to 4 days PAB similarly induced senescence in H460 cells, dependent on p53 pathway. Acta Pharmacol Sin. 2016 Jul;37(7):919-29.
A549 cells 5–80 µM 1 to 4 days PAB induced senescence in A549 cells via p53 pathway activation, without apoptosis or necrosis. Acta Pharmacol Sin. 2016 Jul;37(7):919-29.
624 mel cells 0.01, 0.1, 1.0, 10 µM 48 h PLAB exhibited antiproliferative effects on 624 mel cells with an IC50 of 2.86 μM. Acta Pharmacol Sin. 2009 Apr;30(4):442-50.
A372 cells 0.01, 0.1, 1.0, 10 µM 48 h PLAB exhibited antiproliferative effects on A372 cells with an IC50 of 1.93 μM. Acta Pharmacol Sin. 2009 Apr;30(4):442-50.
SK-28 cells 0.01, 0.1, 1.0, 10 µM 24, 48, 72 h PLAB inhibited the growth of SK-28 cells and induced G2/M arrest, accompanied by up-regulation of Cdc2 phosphorylation and subsequent down-regulation of Cdc2 expression. Acta Pharmacol Sin. 2009 Apr;30(4):442-50.
human lung cancer H1299 cells 20 µM 1, 2, 3 and 4 days PAB induced only apoptosis with decreased glucose utilization Acta Pharmacol Sin. 2017 Oct;38(10):1401-1411.
human lung cancer H460 cells 20 µM PAB induced senescence and increased glucose utilization Acta Pharmacol Sin. 2017 Oct;38(10):1401-1411.
human lung cancer A549 cells 20 µM 1, 2, 3 and 4 days PAB mainly induced senescence rather than apoptosis, accompanied by increased glucose utilization Acta Pharmacol Sin. 2017 Oct;38(10):1401-1411.
Burkitt lymphoma CA46 cells 260-690 nM 96 h Evaluate the inhibitory effect of PAB on cell proliferation, showing IC50 values of 260-690 nM Biochem Pharmacol. 2012 Aug 15;84(4):444-50.
melanoma MDA-MB-435 cells 260-690 nM 96 h Evaluate the inhibitory effect of PAB on cell proliferation, showing IC50 values of 260-690 nM Biochem Pharmacol. 2012 Aug 15;84(4):444-50.
breast carcinoma MCF-7 cells 260-690 nM 96 h Evaluate the inhibitory effect of PAB on cell proliferation, showing IC50 values of 260-690 nM Biochem Pharmacol. 2012 Aug 15;84(4):444-50.
KYSE520 cells 0.5, 2, 5, 10 μM 24, 48, 72 h PAB inhibited the proliferation of KYSE520 cells Drug Des Devel Ther. 2020 Oct 28;14:4561-4573.
KYSE410 cells 0.5, 2, 5, 10 μM 24, 48, 72 h PAB inhibited the proliferation of KYSE410 cells Drug Des Devel Ther. 2020 Oct 28;14:4561-4573.
ECA-109 cells 0.5, 2, 5, 10 μM 24, 48, 72 h PAB inhibited the proliferation of ECA-109 cells Drug Des Devel Ther. 2020 Oct 28;14:4561-4573.
TE-1 cells 0.5, 2, 5, 10 μM 24, 48, 72 h PAB inhibited the proliferation, invasion, and migration of TE-1 cells and promoted apoptosis Drug Des Devel Ther. 2020 Oct 28;14:4561-4573.
MS751 cells 2.5, 5, 10, 20, 40 μM 24, 48, 72 h To investigate the effect of PAB on the survival of MS751 cells, it was found that PAB inhibited cell survival in a time- and concentration-dependent manner. J Gynecol Oncol. 2019 Sep;30(5):e77.
C33A cells 2.5, 5, 10, 20, 40 μM 24, 48, 72 h To investigate the effect of PAB on the survival of C33A cells, it was found that PAB inhibited cell survival in a time- and concentration-dependent manner. J Gynecol Oncol. 2019 Sep;30(5):e77.
CaSki cells 2.5, 5, 10, 20, 40 μM 24, 48, 72 h To investigate the effect of PAB on the survival of CaSki cells, it was found that PAB inhibited cell survival in a time- and concentration-dependent manner. J Gynecol Oncol. 2019 Sep;30(5):e77.
SiHa cells 2.5, 5, 10, 20, 40 μM 24, 48, 72 h To investigate the effect of PAB on the survival of SiHa cells, it was found that PAB inhibited cell survival in a time- and concentration-dependent manner. J Gynecol Oncol. 2019 Sep;30(5):e77.
HeLa cells 2.5, 5, 10, 20, 40 μM 24, 48, 72 h To investigate the effect of PAB on the survival of HeLa cells, it was found that PAB inhibited cell survival in a time- and concentration-dependent manner. J Gynecol Oncol. 2019 Sep;30(5):e77.

In Vivo:

Species
Animal Model
Administration Dosage Frequency Description References
Kunming mice Liver echinococcosis model Oral 40, 20, 10, 5 mg/kg Once daily for 12 weeks To evaluate the therapeutic effect of PAB on liver echinococcosis, results showed 40, 20 and 10 mg/kg PAB significantly reduced the wet weight of cysts and down-regulated the expression of TGF-β1 protein and mRNA Front Microbiol. 2022 Nov 11;13:1008274.
BALB/c nude mice Subcutaneous xenograft MDA-MB-231 tumor model Intraperitoneal injection 10 mg/kg Every 2 days for seven times PAB significantly inhibited tumor growth and reduced the number of lung metastatic nodules Cell Death Dis. 2022 Jun 20;13(6):557.
BALB/c mice Subcutaneously transplanted tumor animal model Intraperitoneal injection 10, 20, 30 mg/kg PAB inhibited tumor growth, reducing tumor volume and weight Drug Des Devel Ther. 2020 Oct 28;14:4561-4573.
Mice Mice 10, 15, 25, 0.1 mg/kg To test the in vivo antitumor activity of PAB, it was found that PAB selectively inhibited cancer cell proliferation with minimal effect on normal tissue cells. J Gynecol Oncol. 2019 Sep;30(5):e77.

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