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Abstract Title:

Wound healing effects of noni (Morinda citrifolia L.) leaves: a mechanism involving its PDGF/A2A receptor ligand binding and promotion of wound closure.

Abstract Source:

Phytother Res. 2010 Oct;24(10):1437-41. PMID: 20878690

Abstract Author(s):

Afa Palu, Chen Su, Bing-Nan Zhou, Brett West, Jarakae Jensen

Article Affiliation:

Tahitian Noni International, R&D, American Fork, Utah, USA. afap@tni.com

Abstract:

Morinda citrifolia L. (Rubiaceae) commonly known as noni, has been used in Polynesia by traditional healers for the treatment of cuts, bruises and wounds. Our objective was to investigate the wound-healing mechanisms of the noni leaf. The investigations of its wound-healing mechanisms were carried out using fresh noni leaf juice (NLJ), noni leaf ethanol extract (NLEE) and its methanol (MFEE) and hexane (HFEE) fractions on the PDGF and A(2A) receptors in vitro and topically in mice. Fresh noni leaf juice showed significant affinity to PDGF receptors, and displayed 166% binding inhibition of the ligand binding to its receptors, while at the same concentration, it only had 7% inhibition of the ligand binding to the A(2A) receptors. NLEE, HFEE and MFEE showed significant affinity to A(2A) receptors, concentration dependently, with IC(50) values of 34.1, 42.9 and 86.7μg/mL, respectively. However, MFEE significantly increased wound closure and reduced the half closure time in mice with a CT(50) of 5.4 ± 0.2 days compared with control (p<0.05). These results suggest that noni leaf significantly accelerated wound healing in mice via its ligand binding to the PDGF and A(2A) receptors as its probable mechanisms of wound-healing and also support its traditional usage for wound-healing in Polynesia.

Study Type : Animal Study

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