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Purification of a Chitin-Binding Protein from Moringa oleifera Seeds with Potential to Relieve Pain and Inflammation

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Moringa oleifera Lam. is a perennial multipurpose tree that has been successfully used in folk medicine to cure several inflammatory processes. The aim of this study was to purify and characterize a chitin-binding protein from Moringa oleifera seeds, named Mo-CBP4, and evaluate its antinociceptive and anti-inflammatory effects in vivo. The protein was purified by affinity chromatography on chitin followed by ion exchange chromatography. Acetic acid-induced abdominal constrictions assay was used for the antinociceptive and anti-inflammatory activity assessments. Mo-CBP4 is a glycoprotein (2.9% neutral carbohydrate) composed of two protein subunits with apparent molecular masses of 28 and 18 kDa (9 kDa in the presence of reducing agent). The intraperitoneal injection of Mo-CBP4 (3.5 and 10 mg/kg) into mice 30 min before acetic acid administration potently and significantly reduced the occurrence of abdominal writhing in a dose dependent manner by 44.7% and 100%, respectively. In addition, the oral administration of the protein (10 mg/kg) resulted in 18% and 52.8% reductions in abdominal writhing when given 30 and 60 min prior to acetic acid administration, respectively. Mo-CBP4, when administered by intraperitoneal route, also caused a significant and dose-dependent inhibition of peritoneal capillary permeability induced by acid acetic and significantly inhibited leukocyte accumulation in the peritoneal cavity. In conclusion, this pioneering study describes that the chitin-binding protein Mo-CBP4, from M. oleifera seeds, exhibits anti-inflammatory and antinociceptive properties and scientifically supports the use of this multipurpose tree in folk medicine.





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Keywords: Antinociceptive effect; CEPA; Glycoprotein Detection Kit; Mo-CBP4; Moringa oleifera; Moringaceae family; Polyacrylamide Gel Electrophoresis; ad libitum; anti-inflammatory activity; aurantiamide acetate; bioactivity; chitin-binding protein; chromatography; lyophilised; protein purification

Document Type: Research Article

Publication date: November 1, 2011

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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