Effect of cryopreservation on sperm apoptotic deoxyribonucleic acid fragmentation in patients with oligozoospermia

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dc.contributor.authorPaula, Thais Serzedello de [UNIFESP]
dc.contributor.authorBertolla, Ricardo Pimenta [UNIFESP]
dc.contributor.authorSpaine, Deborah Montagnini [UNIFESP]
dc.contributor.authorCunha, Maria Adelaide [UNIFESP]
dc.contributor.authorSchor, Nestor [UNIFESP]
dc.contributor.authorCedenho, Agnaldo Pereira [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T12:41:24Z
dc.date.available2016-01-24T12:41:24Z
dc.date.issued2006-09-01
dc.description.abstractObjective: To verify of the increase in sperm apoptotic DNA fragmentation during cryopreservation is greater in oligozoospermic patients than in normozoospermic controls.Design: Controlled prospective study.Setting: patients in an academic research environment.Patient(s): Forty-seven patients with oligozoospermia (concentration < 10 x 10(6) sperm/mL) and 30 normozoospermic men.Intervention(s): Sperm cryopreservation using a standard protocol with a test-yolk buffer, glycerol as the cryoprotectant.Main Outcome Measure(s): Rate of apoptotic sperm DNA fragmentation as assessed by the terminal deoxynucleotidyl-mediated deoxyuridine triphosphate nickend labeling (TUNEL) assay, graded in apoptotic or nonapoptotic, before and after cryopreservation.Result(s): An increase in apoptotic DNA fragmentation was observed in all the groups, regardless of sperm concentration. Normozoospermic men presented a smaller rate of apoptotic DNA fragmentation than oligozoospermic patients, both in pre- and postcryopreservation samples. the increase in DNA fragmentation was similar in both groups.Conclusion(s): Cryopreservation induces apoptotic sperm DNA fragmentation in men, regardless of sperm concentration. Men with oligozoospermia present with higher precryopreservation and postcryopreservation apoptotic sperm DNA fragmentation. the increase in DNA fragmentation is similar in both groups.en
dc.description.affiliationUniversidade Federal de São Paulo, Dept Surg, Div Urol, BR-04038032 São Paulo, Brazil
dc.description.affiliationUniversidade Federal de São Paulo, Dept Med, Div Nephrol, BR-04038032 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Surg, Div Urol, BR-04038032 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Med, Div Nephrol, BR-04038032 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.format.extent597-600
dc.identifierhttp://dx.doi.org/10.1016/j.fertnstert.2006.01.047
dc.identifier.citationFertility and Sterility. New York: Elsevier B.V., v. 86, n. 3, p. 597-600, 2006.
dc.identifier.doi10.1016/j.fertnstert.2006.01.047
dc.identifier.issn0015-0282
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/29096
dc.identifier.wosWOS:000240998000019
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofFertility and Sterility
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectoligozoospermiaen
dc.subjectinferfilityen
dc.subjectspermen
dc.subjectDNA damageen
dc.subjectTUNEL assayen
dc.subjectcryopreservationen
dc.titleEffect of cryopreservation on sperm apoptotic deoxyribonucleic acid fragmentation in patients with oligozoospermiaen
dc.typeinfo:eu-repo/semantics/article
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