Publications by authors named "Sam Balasch"

Article Synopsis
  • RNA-Seq analysis of human semen highlights the need for purifying sperm samples to remove somatic cells with excessive RNA, which can skew results.
  • The study evaluated the effects of density gradient centrifugation on porcine sperm transcriptome, finding similarities between purified and non-purified samples, but also significant differences in gene expression levels.
  • A total of 7,519 protein coding genes were identified, with 372 showing altered RNA levels post-purification, mainly linked to lower gene expression involved in translation and metabolism, suggesting the purification process impacts certain genes primarily from epididymal and germinal origins.
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Circular RNAs (circRNAs) are emerging as a novel class of noncoding RNAs which potential role as gene regulators is quickly gaining interest. circRNAs have been studied in different tissues and cell types across several animal species. However, a thorough characterization of the circRNAome in ejaculated sperm remains unexplored.

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Understanding the molecular basis of cell function and ultimate phenotypes is crucial for the development of biological markers. With this aim, several RNA-seq studies have been devoted to the characterization of the transcriptome of ejaculated spermatozoa in relation to sperm quality and fertility. Semen quality follows a seasonal pattern and decays in the summer months in several animal species.

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The present study evaluated the effects of exposing liquid-stored boar semen to different red light LED regimens on sperm quality and reproductive performance. Of all of the tested photo-stimulation procedures, the best pattern consisted of 10 min light, 10 min rest and 10 min of further light (10-10-10 pattern). This pattern induced an intense and transient increase in the majority of motility parameters, without modifying sperm viability and acrosome integrity.

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