Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro
Stem cells with enhanced resistance to oxidative stress after in vitro expansion have been shown to have improved engraftment and regenerative capacities. Such cells can be generated by preconditioning them with exposure to an antioxidant. In this study we evaluated the effects of Tualang honey (TH)...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2014
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| Online Access: | http://eprints.usm.my/36392/1/journal.pone.0096800_%281%29.PDF |
| _version_ | 1825833460968718336 |
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| author | Jun, Jie Tan Azmi, Siti Maisura Yoke, Keong Yong Hong, Leong Cheah Vuanghao, Lim Sandai, Doblin Shaharuddin, Bakiah |
| author_facet | Jun, Jie Tan Azmi, Siti Maisura Yoke, Keong Yong Hong, Leong Cheah Vuanghao, Lim Sandai, Doblin Shaharuddin, Bakiah |
| author_sort | Jun, Jie Tan |
| collection | USM |
| description | Stem cells with enhanced resistance to oxidative stress after in vitro expansion have been shown to have improved engraftment and regenerative capacities. Such cells can be generated by preconditioning them with exposure to an antioxidant. In this study we evaluated the effects of Tualang honey (TH), an antioxidant-containing honey, on human corneal epithelial progenitor (HCEP) cells in culture. Cytotoxicity, gene expression, migration, and cellular resistance to oxidative stress were evaluated. Immunofluorescence staining revealed that HCEP cells were holoclonal and expressed epithelial stem cell marker p63 without corneal cytokeratin 3. Cell viability remained unchanged after cells were cultured with 0.004, 0.04, and 0.4% TH in the medium, but it was significantly reduced when the concentration was increased to 3.33%. Cell migration, tested using scratch migration assay, was significantly enhanced when cells were cultured with TH at 0.04% and 0.4%. We also found that TH has hydrogen peroxide (H2O2) scavenging ability, although a trace level of H2O2 was detected in the honey in its native form. Preconditioning HCEP cells with 0.4% TH for 48 h showed better survival following H2O2-induced oxidative stress at 50 µM than untreated group, with a significantly lower number of dead cells (15.3 ± 0.4%) were observed compared to the untreated population (20.5 ± 0.9%, p<0.01). Both TH and ascorbic acid improved HCEP viability following induction of 100 µM H2O2, but the benefit was greater with TH treatment than with ascorbic acid. However, no significant advantage was demonstrated using 5-hydroxymethyl-2-furancarboxaldehyde, a compound that was found abundant in TH using GC/MS analysis. This suggests that the cellular anti-oxidative capacity in HCEP cells was augmented by native TH and was attributed to its antioxidant properties. In conclusion, TH possesses antioxidant properties and can improve cell migration and cellular resistance to oxidative stress in HCEP cells in vitro. |
| first_indexed | 2024-03-06T15:08:10Z |
| format | Article |
| id | usm.eprints-36392 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:08:10Z |
| publishDate | 2014 |
| publisher | Public Library of Science (PLoS) |
| record_format | dspace |
| spelling | usm.eprints-363922017-11-17T08:45:26Z http://eprints.usm.my/36392/ Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro Jun, Jie Tan Azmi, Siti Maisura Yoke, Keong Yong Hong, Leong Cheah Vuanghao, Lim Sandai, Doblin Shaharuddin, Bakiah R Medicine Stem cells with enhanced resistance to oxidative stress after in vitro expansion have been shown to have improved engraftment and regenerative capacities. Such cells can be generated by preconditioning them with exposure to an antioxidant. In this study we evaluated the effects of Tualang honey (TH), an antioxidant-containing honey, on human corneal epithelial progenitor (HCEP) cells in culture. Cytotoxicity, gene expression, migration, and cellular resistance to oxidative stress were evaluated. Immunofluorescence staining revealed that HCEP cells were holoclonal and expressed epithelial stem cell marker p63 without corneal cytokeratin 3. Cell viability remained unchanged after cells were cultured with 0.004, 0.04, and 0.4% TH in the medium, but it was significantly reduced when the concentration was increased to 3.33%. Cell migration, tested using scratch migration assay, was significantly enhanced when cells were cultured with TH at 0.04% and 0.4%. We also found that TH has hydrogen peroxide (H2O2) scavenging ability, although a trace level of H2O2 was detected in the honey in its native form. Preconditioning HCEP cells with 0.4% TH for 48 h showed better survival following H2O2-induced oxidative stress at 50 µM than untreated group, with a significantly lower number of dead cells (15.3 ± 0.4%) were observed compared to the untreated population (20.5 ± 0.9%, p<0.01). Both TH and ascorbic acid improved HCEP viability following induction of 100 µM H2O2, but the benefit was greater with TH treatment than with ascorbic acid. However, no significant advantage was demonstrated using 5-hydroxymethyl-2-furancarboxaldehyde, a compound that was found abundant in TH using GC/MS analysis. This suggests that the cellular anti-oxidative capacity in HCEP cells was augmented by native TH and was attributed to its antioxidant properties. In conclusion, TH possesses antioxidant properties and can improve cell migration and cellular resistance to oxidative stress in HCEP cells in vitro. Public Library of Science (PLoS) 2014-05 Article PeerReviewed application/pdf en cc_by http://eprints.usm.my/36392/1/journal.pone.0096800_%281%29.PDF Jun, Jie Tan and Azmi, Siti Maisura and Yoke, Keong Yong and Hong, Leong Cheah and Vuanghao, Lim and Sandai, Doblin and Shaharuddin, Bakiah (2014) Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro. PLoS ONE, 9 (5). e96800. ISSN 1932-6203 http://dx.doi.org/10.1371/journal.pone.0096800 |
| spellingShingle | R Medicine Jun, Jie Tan Azmi, Siti Maisura Yoke, Keong Yong Hong, Leong Cheah Vuanghao, Lim Sandai, Doblin Shaharuddin, Bakiah Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| title | Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| title_full | Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| title_fullStr | Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| title_full_unstemmed | Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| title_short | Tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| title_sort | tualang honey improves human corneal epithelial progenitor cell migration and cellular resistance to oxidative stress in vitro |
| topic | R Medicine |
| url | http://eprints.usm.my/36392/1/journal.pone.0096800_%281%29.PDF |
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