Abstract
Although the portion of the genome devoted to protein synthesis is very small, it is now known that almost the entire genome is expressed as non-coding RNAs. Among them, there are long noncoding RNAs (lncRNAs). Despite that lncRNAs have been very poorly studied, they have recently started to focus the attention of researchers, as it has been found out that lncRNAs can perform diverse functions in the regulation of gene expression. Besides, their involvement in pathologies is being revealed. Intriguingly, the amount of lncRNAs in the testis is overwhelmingly higher than in any other analyzed organ or tissue. LncRNA expression profiles significantly vary along spermatogenesis, and some evidence suggests that at least some of them could participate in the formation of male germ cells. However, knowledge on the subject is still very scarce. In this work we review the available information on the expression of lncRNAs in testis and their possible roles. We also analyze some examples that illustrate the participation of lncRNAs in the development of pathologies such as infertility and testicular cancer.
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