Limits...
Gelam honey scavenges peroxynitrite during the immune response.

Kassim M, Mansor M, Suhaimi A, Ong G, Yusoff KM - Int J Mol Sci (2012)

Bottom Line: Gelam honey significantly improved the viability of LPS/IFN-γ-treated RAW 264.7 cells and inhibited nitric oxide production-similar to the effects observed with an inhibitor of inducible nitric oxide synthase (1400W).Honey inhibited peroxynitrite synthesis in LPS-treated rats.Thus, honey may attenuate inflammatory responses that lead to cell damage and death, suggesting its therapeutic uses for several inflammatory disorders.

View Article: PubMed Central - PubMed

Affiliation: Department of Anesthesiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; E-Mails: marzida@gmail.com (M.M.); gracieo@um.edu.my (G.O.).

ABSTRACT
Monocytes and macrophages are part of the first-line defense against bacterial, fungal, and viral infections during host immune responses; they express high levels of proinflammatory cytokines and cytotoxic molecules, including nitric oxide, reactive oxygen species, and their reaction product peroxynitrite. Peroxynitrite is a short-lived oxidant and a potent inducer of cell death. Honey, in addition to its well-known sweetening properties, is a natural antioxidant that has been used since ancient times in traditional medicine. We examined the ability of Gelam honey, derived from the Gelam tree (Melaleuca spp.), to scavenge peroxynitrite during immune responses mounted in the murine macrophage cell line RAW 264.7 when stimulated with lipopolysaccharide/interferon-γ (LPS/IFN-γ) and in LPS-treated rats. Gelam honey significantly improved the viability of LPS/IFN-γ-treated RAW 264.7 cells and inhibited nitric oxide production-similar to the effects observed with an inhibitor of inducible nitric oxide synthase (1400W). Furthermore, honey, but not 1400W, inhibited peroxynitrite production from the synthetic substrate 3-morpholinosydnonimine (SIN-1) and prevented the peroxynitrite-mediated conversion of dihydrorhodamine 123 to its fluorescent oxidation product rhodamine 123. Honey inhibited peroxynitrite synthesis in LPS-treated rats. Thus, honey may attenuate inflammatory responses that lead to cell damage and death, suggesting its therapeutic uses for several inflammatory disorders.

Show MeSH

Related in: MedlinePlus

Effect of honey on the concentration of 3-nitrotyrosine in rat serum. Treated groups of animals were intravenously injected with either honey (50 or 500 mg/kg diluted in saline) or saline alone. One hour later, the treated animals were injected with LPS (5 mg/kg), and 4 h later, the treated and untreated rats were killed. The sera were collected and assayed for the presence of 3-nitrotyrosine. Data are expressed as the mean ± SEM. *** p < 0.001 and * p < 0.05 compared with the positive (LPS alone) control.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
getmorefigures.php?uid=PMC3472796&req=5

f5-ijms-13-12113: Effect of honey on the concentration of 3-nitrotyrosine in rat serum. Treated groups of animals were intravenously injected with either honey (50 or 500 mg/kg diluted in saline) or saline alone. One hour later, the treated animals were injected with LPS (5 mg/kg), and 4 h later, the treated and untreated rats were killed. The sera were collected and assayed for the presence of 3-nitrotyrosine. Data are expressed as the mean ± SEM. *** p < 0.001 and * p < 0.05 compared with the positive (LPS alone) control.

Mentions: Pretreatment with 50 mg/kg or 500 mg/kg of honey also significantly inhibited peroxynitrite formation in rats, albeit not in a dose-dependent manner. Inhibition was determined by a reduction in 3-nitrotyrosine, which is an in vitro marker of peroxynitrite (Figure 5).


Gelam honey scavenges peroxynitrite during the immune response.

Kassim M, Mansor M, Suhaimi A, Ong G, Yusoff KM - Int J Mol Sci (2012)

Effect of honey on the concentration of 3-nitrotyrosine in rat serum. Treated groups of animals were intravenously injected with either honey (50 or 500 mg/kg diluted in saline) or saline alone. One hour later, the treated animals were injected with LPS (5 mg/kg), and 4 h later, the treated and untreated rats were killed. The sera were collected and assayed for the presence of 3-nitrotyrosine. Data are expressed as the mean ± SEM. *** p < 0.001 and * p < 0.05 compared with the positive (LPS alone) control.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3472796&req=5

f5-ijms-13-12113: Effect of honey on the concentration of 3-nitrotyrosine in rat serum. Treated groups of animals were intravenously injected with either honey (50 or 500 mg/kg diluted in saline) or saline alone. One hour later, the treated animals were injected with LPS (5 mg/kg), and 4 h later, the treated and untreated rats were killed. The sera were collected and assayed for the presence of 3-nitrotyrosine. Data are expressed as the mean ± SEM. *** p < 0.001 and * p < 0.05 compared with the positive (LPS alone) control.
Mentions: Pretreatment with 50 mg/kg or 500 mg/kg of honey also significantly inhibited peroxynitrite formation in rats, albeit not in a dose-dependent manner. Inhibition was determined by a reduction in 3-nitrotyrosine, which is an in vitro marker of peroxynitrite (Figure 5).

Bottom Line: Gelam honey significantly improved the viability of LPS/IFN-γ-treated RAW 264.7 cells and inhibited nitric oxide production-similar to the effects observed with an inhibitor of inducible nitric oxide synthase (1400W).Honey inhibited peroxynitrite synthesis in LPS-treated rats.Thus, honey may attenuate inflammatory responses that lead to cell damage and death, suggesting its therapeutic uses for several inflammatory disorders.

View Article: PubMed Central - PubMed

Affiliation: Department of Anesthesiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; E-Mails: marzida@gmail.com (M.M.); gracieo@um.edu.my (G.O.).

ABSTRACT
Monocytes and macrophages are part of the first-line defense against bacterial, fungal, and viral infections during host immune responses; they express high levels of proinflammatory cytokines and cytotoxic molecules, including nitric oxide, reactive oxygen species, and their reaction product peroxynitrite. Peroxynitrite is a short-lived oxidant and a potent inducer of cell death. Honey, in addition to its well-known sweetening properties, is a natural antioxidant that has been used since ancient times in traditional medicine. We examined the ability of Gelam honey, derived from the Gelam tree (Melaleuca spp.), to scavenge peroxynitrite during immune responses mounted in the murine macrophage cell line RAW 264.7 when stimulated with lipopolysaccharide/interferon-γ (LPS/IFN-γ) and in LPS-treated rats. Gelam honey significantly improved the viability of LPS/IFN-γ-treated RAW 264.7 cells and inhibited nitric oxide production-similar to the effects observed with an inhibitor of inducible nitric oxide synthase (1400W). Furthermore, honey, but not 1400W, inhibited peroxynitrite production from the synthetic substrate 3-morpholinosydnonimine (SIN-1) and prevented the peroxynitrite-mediated conversion of dihydrorhodamine 123 to its fluorescent oxidation product rhodamine 123. Honey inhibited peroxynitrite synthesis in LPS-treated rats. Thus, honey may attenuate inflammatory responses that lead to cell damage and death, suggesting its therapeutic uses for several inflammatory disorders.

Show MeSH
Related in: MedlinePlus