Piperine, [1-[5-[1,3-benzodioxol-5-yl]-1-oxo-2,4, pentadienyl] piperidine], is a pungent alkaloid present in Piper nigrum Linn, and P. longum Linn. It is shown to enhance the bioavailability of various structurally and therapeutically diverse drugs. A concise mechanism responsible for its bioavailability enhancing action is poorly understood. This study is an effort to understand the absorption...

P. nigrum L. extracts and the piperine alkaloid have important antimicrobial, anti-inflammatory, antioxidant properties. Therefore, in this study, we evaluated antimicrobial activity cytotoxicity of piperine, a compound isolated from Extracts obtained via maceration, soxhlet, purification steps, addition to were used study. Spectroscopic methods, such as nuclear magnetic resonance, scanning ele...

Previous research has shown that resveratrol can increase cerebral blood flow (CBF) in the absence of improved cognitive performance in healthy, young human subjects during the performance of cognitively demanding tasks. This lack of cognitive effects may be due to low bioavailability and, in turn, reduced bioefficacy of resveratrol in vivo. Piperine can alter polyphenol pharmacokinetics, but p...

Black peppercorns (Piper nigrum L.) elicit a pungent and tingling oral impression. Their pungency is partially explained by the agonist activity of some of their active principles, especially piperine, on TRP channels. However, we recently showed that piperine, as well as other pungent compounds, also possess a marked effect on two-pore domain (KCNK, K2P) K+ channels. Members of this family pla...

For a long time, the focus of trigeminal chemoperception has rested almost exclusively on TRP channels. However, two-pore domain (K2P) potassium channels have recently been identified as targets for substances associated with typical trigeminal sensations, such as numbing and tingling. In addition, they have been shown to be modulated by several TRP agonists. We investigated whether the pungent...

Thymoquinone (TQ) and piperine, the active ingredients in cumin (Nigella sativa) and black pepper (Piper longum), respectively, exhibit various bioactivities including anticancer effects. The aim of the present study is to investigate the antineoplastic activity of a combination of TQ and piperine against breast cancer implanted in mice. The antiproliferative effects of TQ, piperine, and a comb...

The persistent activation of intestinal mechanistic target rapamycin complex 1 (mTORC1) triggered by mucosal stress has been linked to deregulation the gut immune response resulting in inflammation and cell death. present study investigated regulatory properties food-derived mTORC1 modulators, curcumin, piperine, toward polarization stimulated macrophages differentiation monocytes at two activi...

Piperine (1-peperoyl piperidine) was isolated from Piper nigrum Linn for the evaluation of anti-inflammatory activity in rats. Different acute and chronic experimental models like carrageenin-induced rat paw edema, cotton pellet granuloma, and croton oil-induced granuloma pouch, were employed. Simultaneously, biochemical estimations were made to elucidate the underlying mechanism of the action....

A simple, rapid and precise reverse-phase high performance liquid chromatographic method has been developed for the quantitative determination of piperine from Ayurvedic Polyherbal formulations Arkavati, Krvyadras and Marichyadi taila. Chromatographic analysis was carried out on cosmosil C18 column (150mm x 4.6mm, 5μm particle) with a mobile phase of methanol: water in the volume ratio of 70:30...

BACKGROUND Increase of blood pressure is accompanied by functional and morphological changes in the vascular wall. The presented study explored the effects of curcuma and black pepper compounds on increased blood pressure and remodeling of aorta in the rat model of experimental NO-deficient hypertension. METHODS Wistar rats were administered for 6 weeks clear water or L-NAME (40 mg/kg/day) di...