Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo.
Nitric oxide (NO) is reported to play significant a role in oocyte activation and maturation, implantation, and early embryonic development. Previously we have shown that NO forms an important component of the oocyte microenvironment, and functions effectively to delay oocyte aging. Thus, precise in...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4041775?pdf=render |
| _version_ | 1818581591383867392 |
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| author | Pravin T Goud Anuradha P Goud Tohid Najafi Bernard Gonik Michael P Diamond Ghassan M Saed Xueji Zhang Husam M Abu-Soud |
| author_facet | Pravin T Goud Anuradha P Goud Tohid Najafi Bernard Gonik Michael P Diamond Ghassan M Saed Xueji Zhang Husam M Abu-Soud |
| author_sort | Pravin T Goud |
| collection | DOAJ |
| description | Nitric oxide (NO) is reported to play significant a role in oocyte activation and maturation, implantation, and early embryonic development. Previously we have shown that NO forms an important component of the oocyte microenvironment, and functions effectively to delay oocyte aging. Thus, precise information about intra-oocyte NO concentrations [NO] will result in designing more accurate treatment plans in assisted reproduction. In this work, the direct, real-time and quantitative intra-oocyte [NO] was measured utilizing an L-shaped amperometric integrated NO-selective electrode. This method not only provides an elegant and convenient approach to real-time the measurement of NO in physiological environments, but also mimics the loss of NO caused by rapid NO diffusion combined with its reactivity in the biological milieu. This experiment suggests that the NO levels of oocytes obtained from young animals are significantly higher than those of oocytes obtained from old animals. Additionally the NO levels stay constant during the measurements; however, the intra-oocyte [NO] is reduced significantly (70-75% reduction) in response to L-NAME incubation, suggesting that NO measurements are truly NOS based rather than caused by an unknown interfering substance in our system. We believe this first demonstration of the direct quantitative measurement of [NO] in situ in an intact cellular complex should be useful in tracking real-time and rapid changes at nanomolar levels. Moreover, this finding confirms and extends our previous work showing that supplementation with NO delays the oocyte aging process. |
| first_indexed | 2024-12-16T07:35:55Z |
| format | Article |
| id | doaj.art-cc5a43cad42348aabb378a017be6ce77 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-16T07:35:55Z |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-cc5a43cad42348aabb378a017be6ce772022-12-21T22:39:13ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0196e9872010.1371/journal.pone.0098720Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo.Pravin T GoudAnuradha P GoudTohid NajafiBernard GonikMichael P DiamondGhassan M SaedXueji ZhangHusam M Abu-SoudNitric oxide (NO) is reported to play significant a role in oocyte activation and maturation, implantation, and early embryonic development. Previously we have shown that NO forms an important component of the oocyte microenvironment, and functions effectively to delay oocyte aging. Thus, precise information about intra-oocyte NO concentrations [NO] will result in designing more accurate treatment plans in assisted reproduction. In this work, the direct, real-time and quantitative intra-oocyte [NO] was measured utilizing an L-shaped amperometric integrated NO-selective electrode. This method not only provides an elegant and convenient approach to real-time the measurement of NO in physiological environments, but also mimics the loss of NO caused by rapid NO diffusion combined with its reactivity in the biological milieu. This experiment suggests that the NO levels of oocytes obtained from young animals are significantly higher than those of oocytes obtained from old animals. Additionally the NO levels stay constant during the measurements; however, the intra-oocyte [NO] is reduced significantly (70-75% reduction) in response to L-NAME incubation, suggesting that NO measurements are truly NOS based rather than caused by an unknown interfering substance in our system. We believe this first demonstration of the direct quantitative measurement of [NO] in situ in an intact cellular complex should be useful in tracking real-time and rapid changes at nanomolar levels. Moreover, this finding confirms and extends our previous work showing that supplementation with NO delays the oocyte aging process.http://europepmc.org/articles/PMC4041775?pdf=render |
| spellingShingle | Pravin T Goud Anuradha P Goud Tohid Najafi Bernard Gonik Michael P Diamond Ghassan M Saed Xueji Zhang Husam M Abu-Soud Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo. PLoS ONE |
| title | Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo. |
| title_full | Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo. |
| title_fullStr | Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo. |
| title_full_unstemmed | Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo. |
| title_short | Direct real-time measurement of intra-oocyte nitric oxide concentration in vivo. |
| title_sort | direct real time measurement of intra oocyte nitric oxide concentration in vivo |
| url | http://europepmc.org/articles/PMC4041775?pdf=render |
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