Osmotic and aging effects in caviar oocytes throughout water and lipid changes assessed by 1H NMR T1 and T2 relaxation and MRI.
Identifieur interne : 000B50 ( Main/Exploration ); précédent : 000B49; suivant : 000B51Osmotic and aging effects in caviar oocytes throughout water and lipid changes assessed by 1H NMR T1 and T2 relaxation and MRI.
Auteurs : Maristella Gussoni [Italie] ; Fulvia Greco ; Alessandra Vezzoli ; Maria Antonietta Paleari ; Vittorio Maria Moretti ; Barbara Lanza ; Lucia ZettaSource :
- Magnetic resonance imaging [ 0730-725X ] ; 2007.
English descriptors
- KwdEn :
- Animals, Cell Aging, Female, Fishes (anatomy & histology), Fishes (metabolism), In Vitro Techniques, Lipid Metabolism, Magnetic Resonance Imaging, Magnetic Resonance Spectroscopy, Microscopy, Electron, Scanning, Oocytes (cytology), Oocytes (metabolism), Osmotic Pressure, Sodium Chloride, Water (metabolism).
- MESH :
- chemical , metabolism : Water.
- chemical : Sodium Chloride.
- anatomy & histology : Fishes.
- cytology : Oocytes.
- metabolism : Fishes, Oocytes.
- Animals, Cell Aging, Female, In Vitro Techniques, Lipid Metabolism, Magnetic Resonance Imaging, Magnetic Resonance Spectroscopy, Microscopy, Electron, Scanning, Osmotic Pressure.
Abstract
By combining NMR relaxation spectroscopy and magnetic resonance imaging techniques, unsalted (us) and salted (s) caviar (Acipenser transmontanus) oocytes were characterized over a storage period of up to 90 days. The aging and the salting effects on the two major cell constituents, water and lipids, were separately assessed. T1 and T2 decays were interpreted by assuming a two-site exchange model. At Day 0, two water compartments that were not in fast exchange were identified by the T1 relaxation measurements on the us oocytes. In the s samples, T1 decay was monoexponential. During the time of storage, an increment of the free water amount was found for the us oocytes, ascribed to an increased metabolism. T1 and T2 of the s oocytes shortened as a consequence of the osmotic stress produced by salting. Selective images showed the presence of water endowed with different regional mobility that severely changed during the storage. Lipid T1 relaxation decays collected on us and s samples were found to be biexponential, and the T1 values lengthened during storage. In us and s oocytes, the increased lipid mobility with the storage was ascribed to lipolysis. Selective images of us samples showed lipids that were confined to the cytoplasm for up to 60 days of storage.
DOI: 10.1016/j.mri.2006.08.017
PubMed: 17222723
Affiliations:
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uniqKey="Paleari M" first="Maria Antonietta" last="Paleari">Maria Antonietta Paleari</name></author><author><name sortKey="Moretti, Vittorio Maria" sort="Moretti, Vittorio Maria" uniqKey="Moretti V" first="Vittorio Maria" last="Moretti">Vittorio Maria Moretti</name></author><author><name sortKey="Lanza, Barbara" sort="Lanza, Barbara" uniqKey="Lanza B" first="Barbara" last="Lanza">Barbara Lanza</name></author><author><name sortKey="Zetta, Lucia" sort="Zetta, Lucia" uniqKey="Zetta L" first="Lucia" last="Zetta">Lucia Zetta</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2007">2007</date><idno type="RBID">pubmed:17222723</idno><idno type="pmid">17222723</idno><idno type="doi">10.1016/j.mri.2006.08.017</idno><idno type="wicri:Area/PubMed/Corpus">000504</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000504</idno><idno type="wicri:Area/PubMed/Curation">000504</idno><idno type="wicri:explorRef" 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degli Studi di Milano, Dipartimento di Scienze e Tecnologie Biomediche, Segrate (MI), I-20090 Italy. maristella.gussoni@unimi.it</nlm:affiliation><country wicri:rule="url">Italie</country></affiliation></author><author><name sortKey="Greco, Fulvia" sort="Greco, Fulvia" uniqKey="Greco F" first="Fulvia" last="Greco">Fulvia Greco</name></author><author><name sortKey="Vezzoli, Alessandra" sort="Vezzoli, Alessandra" uniqKey="Vezzoli A" first="Alessandra" last="Vezzoli">Alessandra Vezzoli</name></author><author><name sortKey="Paleari, Maria Antonietta" sort="Paleari, Maria Antonietta" uniqKey="Paleari M" first="Maria Antonietta" last="Paleari">Maria Antonietta Paleari</name></author><author><name sortKey="Moretti, Vittorio Maria" sort="Moretti, Vittorio Maria" uniqKey="Moretti V" first="Vittorio Maria" last="Moretti">Vittorio Maria Moretti</name></author><author><name sortKey="Lanza, Barbara" sort="Lanza, Barbara" uniqKey="Lanza B" first="Barbara" last="Lanza">Barbara Lanza</name></author><author><name sortKey="Zetta, Lucia" sort="Zetta, Lucia" uniqKey="Zetta L" first="Lucia" last="Zetta">Lucia Zetta</name></author></analytic><series><title level="j">Magnetic resonance imaging</title><idno type="ISSN">0730-725X</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Cell Aging</term><term>Female</term><term>Fishes (anatomy & histology)</term><term>Fishes (metabolism)</term><term>In Vitro Techniques</term><term>Lipid Metabolism</term><term>Magnetic Resonance Imaging</term><term>Magnetic Resonance Spectroscopy</term><term>Microscopy, Electron, Scanning</term><term>Oocytes (cytology)</term><term>Oocytes (metabolism)</term><term>Osmotic Pressure</term><term>Sodium Chloride</term><term>Water (metabolism)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Water</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Sodium Chloride</term></keywords><keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Fishes</term></keywords><keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Oocytes</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Fishes</term><term>Oocytes</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Cell Aging</term><term>Female</term><term>In Vitro Techniques</term><term>Lipid Metabolism</term><term>Magnetic Resonance Imaging</term><term>Magnetic Resonance Spectroscopy</term><term>Microscopy, Electron, Scanning</term><term>Osmotic Pressure</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">By combining NMR relaxation spectroscopy and magnetic resonance imaging techniques, unsalted (us) and salted (s) caviar (Acipenser transmontanus) oocytes were characterized over a storage period of up to 90 days. The aging and the salting effects on the two major cell constituents, water and lipids, were separately assessed. T1 and T2 decays were interpreted by assuming a two-site exchange model. At Day 0, two water compartments that were not in fast exchange were identified by the T1 relaxation measurements on the us oocytes. In the s samples, T1 decay was monoexponential. During the time of storage, an increment of the free water amount was found for the us oocytes, ascribed to an increased metabolism. T1 and T2 of the s oocytes shortened as a consequence of the osmotic stress produced by salting. Selective images showed the presence of water endowed with different regional mobility that severely changed during the storage. Lipid T1 relaxation decays collected on us and s samples were found to be biexponential, and the T1 values lengthened during storage. In us and s oocytes, the increased lipid mobility with the storage was ascribed to lipolysis. Selective images of us samples showed lipids that were confined to the cytoplasm for up to 60 days of storage.</div></front></TEI><affiliations><list><country><li>Italie</li></country></list><tree><noCountry><name sortKey="Greco, Fulvia" sort="Greco, Fulvia" uniqKey="Greco F" first="Fulvia" last="Greco">Fulvia Greco</name><name sortKey="Lanza, Barbara" sort="Lanza, Barbara" uniqKey="Lanza B" first="Barbara" last="Lanza">Barbara Lanza</name><name sortKey="Moretti, Vittorio Maria" sort="Moretti, Vittorio Maria" uniqKey="Moretti V" first="Vittorio Maria" last="Moretti">Vittorio Maria Moretti</name><name sortKey="Paleari, Maria Antonietta" sort="Paleari, Maria Antonietta" uniqKey="Paleari M" first="Maria Antonietta" last="Paleari">Maria Antonietta Paleari</name><name sortKey="Vezzoli, Alessandra" sort="Vezzoli, Alessandra" uniqKey="Vezzoli A" first="Alessandra" last="Vezzoli">Alessandra Vezzoli</name><name sortKey="Zetta, Lucia" sort="Zetta, Lucia" uniqKey="Zetta L" first="Lucia" last="Zetta">Lucia Zetta</name></noCountry><country name="Italie"><noRegion><name sortKey="Gussoni, Maristella" sort="Gussoni, Maristella" uniqKey="Gussoni M" first="Maristella" last="Gussoni">Maristella Gussoni</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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