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[Antidepressant amides from Piper laetispicum C. DC].

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OBJECTIVE To investigate the antidepressant constituents of Piper laetispicum C. DC. METHODS The compounds were enriched by column chromatography on silica gel. Structural determination of the pure compounds was based on extensive analyses of modern spectroscopic methods including MS, HR-MS, UV, IR,

[Pharmacological studies on extracts from Piper boehmeriaefolium var. tonkinense].

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OBJECTIVE To study sedative, analgesic, antidepressant and anti-inflammatory effects of the extracts from Piper boehmeriaefolium var. tonkinense. METHODS EtOAc soluble constituents and EtOH soluble constituents were administered 50, 100 mg x kg(-1) to mice respectively. The sedative effects were

Laetispicine, an amide alkaloid from Piper laetispicum, presents antidepressant and antinociceptive effects in mice.

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In the present work, we studied the effect of laetispicine, an amide alkaloid isolated from the stems of Piper laetispicum (Piperaceae), in forced swimming, open field, acetic acid writhing and formalin tests in KM mice to assess antidepressant and antinociceptive effects. A significant and

Piplartine, an amide alkaloid from Piper tuberculatum, presents anxiolytic and antidepressant effects in mice.

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In the present work, we studied the effects of piplartine (PIP), an amide alkaloid isolated from the roots of Piper tuberculatum (Piperaceae), in the elevated plus maze, open field, rota rod, pentylenetetrazole (PTZ)-induced seizures, and forced swimming tests, in mice (Swiss, male, 25 g) to assess

Piperine production by endophytic fungus Colletotrichum gloeosporioides isolated from Piper nigrum.

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Many endophytic fungi have been reported with the biosynthetic potential to produce same or similar metabolites present in host plants. The adaptations that might have acquired by these fungi as a result of the long-term association with their host plants can be the possible basis of their

Methylpiperate derivatives from Piper longum and their inhibition of monoamine oxidase.

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We have previously reported that piperine, a known piperidine alkaloid from Piper longum, competitively inhibited mouse brain MAO-A and MAO-B activities. Piperine also showed in vivo antidepressant-like activity against the tail suspension test. In the present study, we further expanded on the

Simultaneous determination of ten active components in 12 Chinese Piper species by HPLC.

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Piper is a genus that is recently valued for the treatment of central nervous system diseases. The major constituents, amides and lignans, are responsible for the antinociceptive and antidepressant activities. This study developed a RP-HPLC-UV method for the simultaneous determination of eight

Piperine from the fruits of Piper longum with inhibitory effect on monoamine oxidase and antidepressant-like activity.

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A bioassay-guided isolation of the ethanol extract from the fruits of Piper longum yielded a known piperidine alkaloid, piperine, as a monoamine oxidase (MAO) inhibitor. Piperine showed an inhibitory effect against MAO-A (IC50 value: 20.9 microM) and MAO-B (IC50 value: 7.0 microM). Kinetic analyses

Preventive potentials of piperlongumine and a Piper longum extract against stress responses and pain.

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OBJECTIVE To compare stress resistance increasing and analgesic activities of piperlongumine and a methanolic Piper longum fruit extract (PLE). METHODS Efficacies of a single and repeated daily oral doses (1-256 mg/kg/day) of PLE, piperlongumine, and 50 mg/kg/day doxycycline against foot shock

Piper sarmentosum Roxb.: A review on its botany, traditional uses, phytochemistry, and pharmacological activities

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Ethnopharmacological relevance: Piper sarmentosum Roxb. (Piperaceae) is a traditional medicinal plant widely distributed in India, Malaysia, Thailand, and the southeastern coastal areas of China including Fujian, Guangdong, and Guizhou.

Melatonin receptor agonist Piper betle L. ameliorates dexamethasone-induced early life stress in adult zebrafish.

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Early life exposure to stress has been suggested to be a crucial factor for the development of the brain and its functions. It is well documented that childhood stress is a risk factor for sleep problems in adulthood. Piper betle L. leaf extract (PB) has been used in several traditional

Studies on antidepressant and antinociceptive effects of ethyl acetate extract from Piper laetispicum and structure-activity relationship of its amide alkaloids.

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Piper laetispicum C.DC. (Piperaceae), is an endemic climbing, glabrous plant distributed in the southern part of China. A novel alkaloid amide, Laetispicine, from it has been proven to possess antidepressant activity. In this present study, antidepressant and antinociceptive effects of the ethyl

Anxiolytic and antidepressant profile of the methanolic extract of Piper nigrum fruits in beta-amyloid (1-42) rat model of Alzheimer's disease.

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BACKGROUND Piper nigrum L. (Piperaceae) is employed in traditional medicine of many countries as analgesic, antiinflammatory, anticonvulsant, antioxidant, antidepressant and cognitive-enhancing agent. This study was undertaken in order to evaluate the possible anxiolytic, antidepressant and

Evaluation of the genotoxicity of piplartine, an alkamide of Piper tuberculatum, in yeast and mammalian V79 cells.

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The genus Piper belongs to the Piperaceae family, and includes species of commercial and medicinal importance. Chemical studies on Piper species resulted in the isolation of several biologically active molecules, including alkaloid amides, such as piplartine. This molecule, isolated from Piper

Piperine-like alkamides from Piper nigrum induce BDNF promoter and promote neurite outgrowth in Neuro-2a cells.

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Black pepper (Piper nigrum) contains a variety of alkamides. Among them, piperine has been reported to have antidepressant-like effects in chronically stressed mice, but little is known about the biological activity of other alkamides. In this study, we investigated the effects of alkamides from

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