Study of Sperm Molecular Factors Implicated in Male Fertility
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|ClinicalTrials.gov Identifier: NCT00481403|
Recruitment Status : Unknown
Verified March 2015 by Nicolas Garrido, Instituto Valenciano de Infertilidad, IVI VALENCIA.
Recruitment status was: Active, not recruiting
First Posted : June 1, 2007
Last Update Posted : March 10, 2015
Sperm analysis following World Health Organization guidelines is unable to explain the molecular causes of male infertility when basic sperm parameters are within a normal range and women do not present gynaecological pathology.
Subsequently, there is a need for accurate diagnostic tools in this sense and microarray technology applied to sperm analysis emerges as a promising field
|Condition or disease||Intervention/treatment|
|Male Infertility||Behavioral: Microarray analysis Behavioral: Microarray|
Sperm analysis based in sperm count and motility has been employed for the diagnosis of male fertility for several decades. It is an easy, inexpensive and useful tool to determine the fertile status of a male but there is still a significant number of infertile males with normal sperm features, as determined by the basic sperm analysis, while they remain unable to reach a full-term pregnancy (1). This fact clearly indicates the need to develop new male infertility tests and accurately diagnose the sperm samples from these individuals.
Recent investigations about sperm mRNA contents have described the relevance of the sperm mRNA stock in fertilization and early embryo development in several species. (2) Although sperm is a quiescent cell from the translational point of view, several functional mRNAs that will be delivered into the oocyte after fertilization, that were synthesized in an earlier phase of the spermatogenesis process can be found (3, 4).
The fertile male transcriptome (stock of mRNAs within the sperm of a male able to have progeny) has been already described (5, 6), confirming the expression of thousands of sequence tags with different intensity of expression.
Moreover, several investigations have demonstrated that a differential expression of some key mRNAs is found in infertile males in comparison with fertile males (1, 7).
Nevertheless, there is no information available neither about the characteristics of the stock sperm mRNAs on infertile males or the differences between fertile and infertile men, although several authors have hypothesized that sperm microarray analysis will be the future in the male infertility diagnosis (2, 8-11).
Microarray technology provides information about a wide range of mRNAs expression within a single experiment, permitting to analyze complete sperm expression profiles (SEP) in cells or tissues. Bioinformatics can help in the organization of such amount of results by following logical processes of gene expression grouping, and analyzing statistically these findings.
Our aim with this work was to compare the SEP in spermatozoa obtained from males with idiopathic infertility versus those from sperm donors of proven fertility by employing microarray technology followed by a functional analysis, in order to determine the genes, sequences and biological processes involved in the sperm physiology that are different in infertile vs. fertile males.
|Study Type :||Observational|
|Estimated Enrollment :||100 participants|
|Official Title:||Microarray Analysis in Sperm From Fertile and Infertile Males Without Basic Sperm Analysis Abnormalities|
|Study Start Date :||May 2006|
|Estimated Primary Completion Date :||December 2016|
|Estimated Study Completion Date :||December 2016|
Behavioral: Microarray analysis
- Sperm mRNAs expression profile in samples achieving pregnancy vs those who failed in different assisted reproduction techniques [ Time Frame: 10 months ]
Biospecimen Retention: Samples Without DNA
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Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00481403
|Instituto Universitario Ivi|
|Valencia, Spain, 46015|
|Principal Investigator:||Nicolas Garrido, PhD||Instituto Universitario IVI|