psychotria nemorosa/smertestillende

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Analgesic activity of Psychotria colorata (Willd. ex R. & S.) Muell. Arg. alkaloids.

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An ethnopharmacological survey showed that home remedies prepared with flowers, fruits and roots of Psychotria colorata (Wild. ex R. & S.) Muell. Arg. (RUBIACEAE) are used by Amazonian caboclos as pain killers. These data led to the evaluation of analgesic activity of extracts of P. colorata, using

Involvement of NMDA receptors in the analgesic properties of psychotridine.

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We have previously reported that the alkaloid extract of Psychotria colorata (Willd. ex R. & S.) Muell. Arg., had marked dose-dependent, opioid-like activity. Phytochemical analyses of P. colorata flowers and leaves identified several pyrrolidinoindoline alkaloids, including psychotridine. To

Regeneration of Psychotria umbellata and production of the analgesic indole alkaloid umbellatine.

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Psychotria umbellata Vell. (Rubiaceae), a Brazilian coastal woody species, produces umbellatine (also known as psychollatine), an analgesic indole alkaloid. An in vitro embryogenic regeneration protocol capable of yielding alkaloid-accumulating plants was developed. Rhizogenic calli, which were

Effects of Psychotria colorata alkaloids in brain opioid system.

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An ethnopharmacological survey showed that home remedies prepared with flowers and fruits of Psychotria colorata are used by Amazonian peasants as pain killers. Psychopharmacological in vivo evaluation of alkaloids obtained from leaves and flowers of this species showed a marked dose-dependent

Antinociceptive profile of hodgkinsine.

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To further understand the mechanism of analgesic activity and structural requirements of pyrrolidinoindoline alkaloids identified in Psychotria colorata, we here report the analgesic activity of the trimer hodgkinsine on thermal and chemical models of analgesia. Results show that hodgkinsine

Antioxidant and antimutagenic properties of the monoterpene indole alkaloid psychollatine and the crude foliar extract of Psychotria umbellata Vell.

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Psychollatine is a monoterpene indole alkaloid produced and accumulated by Psychotria umbellata Vell. (Rubiaceae) leaves in relatively high amounts (approximately 3% of the dry weight). The alkaloid has been shown to display opioid-like analgesic, anxiolytic, antidepressive and antipsychotic

Strictosidinic acid, isolated from Psychotria myriantha Mull. Arg. (Rubiaceae), decreases serotonin levels in rat hippocampus.

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Psychotria is a complex genus whose neotropical species are known by the presence of glucosidic monoterpene indole alkaloids. These compounds are able to display a large range of effects on the central nervous system, such as anxiolytic, antidepressant, analgesic, and impairment of learning and

Screening and identification of neuroprotective compounds relevant to Alzheimer׳s disease from medicinal plants of S. Tomé e Príncipe.

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BACKGROUND Alzheimer׳s disease (AD) neuropathology is strongly associated with the activation of inflammatory pathways, and long-term use of anti-inflammatory drugs reduces the risk of developing the disease. In S. Tomé e Príncipe (STP), several medicinal plants are used both for their positive

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