2012年9月5日星期三

Forskolin

Forskolin

Forskolin is extracted from the Plectranthus Barbatus plant, also known as Coleus Forskohlii. Coleus Forskohlii is a plant used in alternative medicine for centuries. The plant is commonly used to support heart and respiratory health. Recently, coleus forskohlii has been associated with weight loss supplements and diet pills.

The action of forskolin (FSK), a stimulator of cAMP-dependent protein kinase (PKA), on nicotinic acetylcholine receptor- (nAChR-) channels was studied on cultured rat muscle fibres. The channel activity was estimated by determiningNp, withN, being the number of channels andp, the single channel open probability. In order to elucidate the possible role of PKA in the modulation of nAChRs, FSK (10–50 μM) was added to the bath or to the pipette filling solution in the cell-attached configuration. The first protocol used was to test for indirectly-mediated cytosolic effects, the other, for any direct effects of the drug on nAChR-channels. Using both experimental protocols, no effects on the duration of single-channel openings or conductance were observed, while channel activity was significantly reduced. In particular, FSK 10 μM) caused a reduction ofNp only when applied to the non-patch membrane. FSK at higher concentrations, produced a more marked decrease ofNp when present in the recording pipette.

Many studies have shown forskolin, as well as other actives in Coleus forskohlii, support cardiovascular health. It is most commonly used as an adjunct to a weight loss regimen rather than a primary strategy. In studies, it is usually used along with a lipolytic hormone, so it may operate synergistically with a supplement that increases lipolytic hormone levels. Forskolin has been implicated to help with reductions in blood pressure, to help treat glaucoma and perhaps even to help with colon cancer treatment.

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