First isolation and antinociceptive activity of a lipid transfer protein from noni (Morinda citrifolia) seeds.
Int J Biol Macromol
; 86: 71-9, 2016 May.
Article
em En
| MEDLINE
| ID: mdl-26783638
ABSTRACT
In this study a novel heat-stable lipid transfer protein, designated McLTP1, was purified from noni (Morinda citrifolia L.) seeds, using four purification steps which resulted in a high-purified protein yield (72 mg McLTP1 from 100g of noni seeds). McLTP1 exhibited molecular masses of 9.450 and 9.466 kDa, determined by electrospray ionisation mass spectrometry. The N-terminal sequence of McLTP1 (AVPCGQVSSALSPCMSYLTGGGDDPEARCCAGV), as analysed by NCBI-BLAST database, revealed a high degree of identity with other reported plant lipid transfer proteins. In addition, this protein proved to be resistant to pepsin, trypsin and chymotrypsin digestion. McLTP1 given intraperitoneally (1, 2, 4 and 8 mg/kg) and orally (8 mg/kg) caused an inhibition of the writhing response induced by acetic acid in mice. This protein displayed thermostability, retaining 100% of its antinociceptive activity after 30 min incubation at 80 °C. Pretreatment of mice with McLTP1 (8 mg/kg, i.p. and p.o.) also decreased neurogenic and inflammatory phases of nociception in the formalin test. Naloxone (2 mg/kg, i.p.) antagonised the antinociceptive effect of McLTP1 suggesting that the opioid mechanisms mediate the analgesic properties of this protein.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Proteínas de Plantas
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Sementes
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Proteínas de Transporte
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Morinda
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Antígenos de Plantas
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Analgésicos
Limite:
Animals
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article