Pilosidine
Pilosidine has vasoconstrictor activity, it showed facilitating effect on adrenaline evoked contractions in rabbit aorta isolated preparations.
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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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Phytochemistry, 2000, 55(5):411-417.
Benzylbenzoate and norlignan glucosides from Curculigo pilosa: structural analysis and in vitro vascular activity[Pubmed:
11140602 ]
METHODS AND RESULTS:
From the rhizomes of Curculigo pilosa, two benzylbenzoate diglucosides, piloside A and piloside B, and a glucosyl-fused norlignan, Pilosidine, previously obtained only as the tetra-O-methyl derivative, were isolated.
CONCLUSIONS:
Pilosidine showed facilitating effect on adrenaline evoked contractions in rabbit aorta isolated preparations.
Farmaco. 2001 May-Jul;56(5-7):353-6.
Studies on vasoconstrictor activity of Curculigo pilosa extracts and of its isolated compounds.[Pubmed:
11482757]
METHODS AND RESULTS:
The Curculigo pilosa total extract, its butanolic fraction (0.5 microg-100 mg/kg) and the most active in vitro compound structurally similar to adrenaline, Pilosidine (10 ng-l mg/kg), caused a reversible and dose-dependent increase in blood pressure in anaesthetized rat. This hypertensive effect is partially reversed (90%) by the prior administration of phentolamine (1 mg/kg) and abolished by pre-treatment with phentolamine (1 mg/kg) and atenolol (100 microg/kg). Neither tachiphylaxis nor any toxic effects were observed.
CONCLUSIONS:
These experimental findings suggest an interaction between C. pilosa and the peripheral adrenergic system (particularly with alpha1 and beta1 receptors); the structure of the bioactive glucosides could be important in evoking this effect.
