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piper/tyrosine

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We screened water and methanol extracts of 28 Indonesian medicinal plants for their protein tyrosine phosphatase 1B (PTP1B) inhibitory activities. Nine water extracts, i.e., Alstonia scholaris leaf, Blumea balsamifera, Cinnamomum burmannii, Cymbopogon nardus, Melaleuca leucadendra, Phyllanthus

Antitumor activity of NPB001-05, an orally active inhibitor of Bcr-Abl tyrosine kinase.

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Scientists are constantly searching for phytochemical compounds with anti-cancer activity. In this study, activity of plant extract NPB001-05 from Piper betle was tested on human chronic myelogenous leukemia (CML) xenograft models. NPB001-05 was active when dosed orally (500 mg/kg) once or twice a
BACKGROUND The kava-kava plant (Piper methysticum) is traditionally consumed by the pacific islanders and has been linked to be involved in several biological activities. Flavokawain B is a unique chalcone, which can be found in the roots of the kava-kava plant. In this study, the operational

Protective effects of piperine against copper-ascorbate induced toxic injury to goat cardiac mitochondria in vitro.

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Piperine, the main alkaloid of black pepper, Piper nigrum Linn., is an important Indian spice used in traditional food and medicine in India. In the present study, we investigated the antioxidant activities of piperine against copper-ascorbate induced toxic injury to mitochondria obtained from a

Inhibition of TNFalpha-induced activation of nuclear factor kappaB by kava (Piper methysticum) derivatives.

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The inducible transcription factor nuclear factor kappaB (NF-kappaB) plays a central role in the regulation of immune, inflammatory and carcinogenic responses. While normal activation of NF-kappaB is required for cell survival and immunity, its deregulated expression is a characteristic of
BACKGROUND Alkaloids from Piper longum (PLA), extracted from P. longum, have potent anti-inflammatory effects. The aim of this study was to investigate whether PLA could protect dopaminergic neurons against inflammation-mediated damage by inhibiting microglial activation using a lipopolysaccharide
Piperlongumine (PL), isolated from Piper longum L., is receiving intense interest due to its selectively ability to kill cancer cells but not normal cells. We synthesized a number of analogues by replacing the cyclic amide of PL with aliphatic amides to explore structural diversity. Compound CG-06

[Protective effect of alkaloids from Piper longum in rat dopaminergic neuron injury of 6-OHDA-induced Parkinson's disease].

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OBJECTIVE To discuss the protective effect of alkaloids from Piper longum (PLA) in rat dopaminergic neuron injury of 6-OHDA-induced Parkinson's disease and its possible mechanism. METHODS The rat PD model was established by injecting 6-OHDA into the unilateral striatum with a brain solid positioner.

Chlorophyllase in Piper betle L. has a role in chlorophyll homeostasis and senescence dependent chlorophyll breakdown.

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Total chlorophyll content and chlorophyllase (chlorophyll-chlorophyllido hydrolase EC 3.1.1.14) activity in fresh leaves of Piper betle L. landrace KS was, respectively, twofold higher and eight fold lower than KV, showing negative correlation between chlorophyll and chlorophyllase activity.

Drug-repositioning screening identified piperlongumine as a direct STAT3 inhibitor with potent activity against breast cancer.

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Signal transducer and activator of transcription (STAT) 3 regulates many cardinal features of cancer including cancer cell growth, apoptosis resistance, DNA damage response, metastasis, immune escape, tumor angiogenesis, the Warburg effect and oncogene addiction and has been validated as a drug

Targeting hepatocellular carcinoma with piperine by radical-mediated mitochondrial pathway of apoptosis: An in vitro and in vivo study.

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Redox mediated cancer therapeutics are of immense interest in the recent decade due to their anticancer activity. Piperine is the principal alkaloid of black and long pepper. Although its anticancer activity has been reported in number of cancers , the precise molecular mechanism of action remains

In vitro cytotoxic and in silico activity of piperine isolated from Piper nigrum fruits Linn.

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BACKGROUND Piper nigrum [Piperaceae], commonly known as black pepper is used as medicine fairly throughout the greater part of India and as a spice globally. OBJECTIVE To isolate piperine and evaluate in vitro cytotoxic [antiproliferative] activity and in silico method. METHODS Piperine was isolated

Effects of the amide alkaloid piperyline on apoptosis, autophagy, and differentiation of pre-osteoblasts

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Background: Amide alkaloidsare typical constituents in plants of the Piperaceae family. Most of the pharmacological properties of Piper nigrum L. are attributed to the major amide alkaloid, piperine. Piperyline (PIPE) is a further amide

Piperlongumine and its analogs down-regulate expression of c-Met in renal cell carcinoma.

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The c-Met protein, a transmembrane receptor tyrosine kinase, is the product of a proto-oncogene. Its only known ligand, hepatocyte growth factor (HGF), regulates cell growth, motility, migration, invasion, proliferation, and angiogenesis. The aberrant expression of c-Met is often associated with

Neuroprotective effects of alkaloids from Piper longum in a MPTP-induced mouse model of Parkinson's disease.

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BACKGROUND Alkaloids of Piper longum L. (Piperaceae) (PLA) include piperine and piperlonguminine. Piper longum and piperine have multiple biological properties including antioxidant activity. OBJECTIVE The present study investigated the neuroprotective effects of PLA in a MPTP-induced mouse model of
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