|Source:||The root of Polygala tenuifolia Willd.|
|Biological Activity or Inhibitors:||1. Tenuifolin is commonly used in traditional Chinese herbal medicine for memory loss, has no inherent toxicity to either the transfected or wild type cells at the effective concentrations, it inhibits amyloid-β secretion in vitro.
2. Tenuifolin is one of the active constituents of HPS against the neurotoxicity induced by Aβ25-35 peptides in vitro and in vivo, it possesses neuroprotective effects against Aβ25-35-induced apoptosis in PC12 cells and significantly improves the cognitive deficits induced by the intrahippocampal injection of Aβ25-35 in mice.
|Solvent:||Pyridine, Methanol, Ethanol, etc.|
|Storage:||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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|After receiving:||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.|
|1 mg||5 mg||10 mg||20 mg||25 mg|
|1 mM||1.4698 mL||7.3489 mL||14.6979 mL||29.3958 mL||36.7447 mL|
|5 mM||0.294 mL||1.4698 mL||2.9396 mL||5.8792 mL||7.3489 mL|
|10 mM||0.147 mL||0.7349 mL||1.4698 mL||2.9396 mL||3.6745 mL|
|50 mM||0.0294 mL||0.147 mL||0.294 mL||0.5879 mL||0.7349 mL|
|100 mM||0.0147 mL||0.0735 mL||0.147 mL||0.294 mL||0.3674 mL|
Pharmacol Biochem Behav. 2015 Jan;128:14-22.
|Tenuifolin, a secondary saponin from hydrolysates of polygalasaponins, counteracts the neurotoxicity induced by Aβ25-35 peptides in vitro and in vivo.[Pubmed: 25444865]|
|The protective effect of Tenuifolin on the cognitive impairments induced by Aβ25-35 injection was assessed using the Morris water maze and step-through passive avoidance tests. Tenuifolin and fallaxsaponin A were isolated from the HPS. Tenuifolin possessed neuroprotective effects against Aβ25-35-induced apoptosis in PC12 cells and significantly improved the cognitive deficits induced by the intrahippocampal injection of Aβ25-35 in mice. Thus, Tenuifolin is one of the active constituents of HPS against the neurotoxicity induced by Aβ25-35 peptides in vitro and in vivo.|
Acta Physiol (Oxf). 2009 Aug;196(4):419-25.
|Tenuifolin, an extract derived from tenuigenin, inhibits amyloid-beta secretion in vitro.[Pubmed: 19208093]|
|In this study, a purified component of tenuigenin, Tenuifolin, was examined and revealed to be an effective compound in vitro. METHODS: Abeta secretion from three sets of COS-7 cells, each carrying a plasmid expressing a different form of APP was examined following the treatment with Tenuifolin. Initially, Tenuifolin was determined to have no inherent toxicity to either the transfected or wild type cells at the effective concentrations. Cells were then treated with 0.5-2.0 microg mL(-1) Tenuifolin for 12 h and their media were examined via an ELISA for Abeta1-40 and Abeta-42. RESULTS: We found that treatment with 2.0 microg mL(-1) Tenuifolin significantly decreased Abeta secretion from COS-7 cells without altering the ratio of Abeta1-40 and Abeta-42. This effect is most probably due to inhibition of the beta-site APP cleaving enzyme as Abeta secretion was not inhibited from cells expressing the C99 fragment. CONCLUSION: Tenuifolin is an effective compound from tenuigenin. We believe that this finding should lead the way for future experiments to determine the exact mechanism for Tenuifolin's effect on Abeta secretion.|
Phytomedicine. 2008 Aug;15(8):587-94.
|Effects of tenuifolin extracted from radix polygalae on learning and memory: a behavioral and biochemical study on aged and amnesic mice.[Pubmed: 18289838]|
|Improving effects of Tenuifolin, extracted from Radix Polygalae (RP), on learning and memory in aged and dysmnesia mice were determined using step-down type passive avoidance test or Y type maze trial. Oral administration of Tenuifolin (0.02, 0.04, 0.08 g/kgd(-1), for 15 d) evidently improved the latency and number of errors in aged and dysmnesia mice. The levels of cortical acetylcholine esterase (AChE) activity and hippocampal neurotransmitters in aged mice given Tenuifolin (0.02, 0.04, 0.08 g/kgd(-1), for 15 d) were also investigated, and increased levels of norepinephrine (NE), dopamine (DA), decreased activity of AChE were found. However, serotonin (5-HT) had no significant difference from that of aged mice given distilled water. The evident improvement of learning and memory of aged mice is carried out by the effects of Tenuifolin on the three stages of memory process, that is, acquisition, consolidation and retrieval. This may do so by relatively increasing the levels of NE, DA in the hippocampus and by decreasing the activity of AChE in the cortex.|