Cysteine-rich secretory protein 1 in seminal plasma: potential biomarker for the distinction between obstructive and nonobstructive azoospermia Christine Légaré, M.Sc., Francine Cloutier, R.T., Sun Makosso-Kallyth, Ph.D., Nathalie Laflamme, Ph.D., Keith Jarvi, M.D., Roland R. Tremblay, M.D., Robert Sullivan, Ph.D.email address Received 22 March 2013; received in revised form 23 July 2013; accepted 23 July 2013. published online 27 August 2013. Abstract Full Text PDF Images References Supplemental Materials Objective To investigate the presence of cysteine-rich secretory protein 1 (CRISP1) in seminal plasma as a means of distinguishing between obstructive azoospermia (OA) and nonobstructive azoospermia (NOA). Design Seminal plasma from normospermic donors (n = 45) and azoospermic donors (n = 80) was examined to determine CRISP1 levels. Neutral alpha-glucosidase (NAG) enzymatic activity was measured for comparison with CRISP1 levels. Setting Research unit of an academic medical center. Patient(s) Normospermic and azoospermic donors from the clinical andrology laboratory of the centre hospitalier universitaire de Québec and from Mount Sinai Hospital. Intervention(s) Seminal CRISP1 measurement by Western blot analysis. Neutral alpha-glucosidase activity was evaluated by a photometric method. Main Outcome Measure(s) Seminal plasma CRISP1 levels, NAG activity, cutoff value, sensitivity, and specificity. Result(s) All seminal plasma samples from normospermic and nonobstructive azoospermic donors were CRISP1 positive, whereas CRISP1 was absent or present at low levels in samples from patients with OA. A significant correlation between seminal CRISP1 levels and NAG activity was found in azoospermic semen samples. The cutoff point to distinguish between donors with NOA or OA was established at 0.655 (relative intensity). At this threshold, specificity was 85% and sensitivity was 92%. Conclusion(s) Seminal CRISP1 combined with NAG activity can potentially distinguish between OA and NOA. Key Words: Azoospermia, male infertility, CRISP1, seminal plasma To access this article, please choose from the options below Login Regis
Posted on: Thu, 31 Oct 2013 18:38:04 +0000
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