Global transcriptome reprogramming during sper-matogenesis ensures timely expression of factors in each phase of male germ cell differentiation. Sper-matocytes and spermatids require particularly exten-sive reprogramming of gene expression to switch from mitosis to meiosis and to support gamete morphogenesis. Here, we uncovered an extensive alternative splicing program during this transmeiotic differentiation. Notably, intron retention was largely the most enriched pattern, with spermatocytes showing generally higher levels of retention compared with spermatids. Retained introns are characterized by weak splice sites and are enriched in genes with strong relevance for gamete func-tion. Meiotic intron-retaining transcripts (IRTs) were exclusively localized in the nucleus. However, differ-ently from other developmentally regulated IRTs, they are stable RNAs, showing longer half-life than properly spliced transcripts. Strikingly, fate-mapping experiments revealed that IRTs are recruited onto polyribosomes days after synthesis. These studies reveal an unexpected function for regulated intron retention in modulation of the timely expression of select transcripts during spermatogenesis.

An orchestrated intron retention program in meiosis controls timely usage of transcripts during germ cell differentiation / Naro, Chiara; Jolly, Ariane; DI PERSIO, Sara; Bielli, Pamela; Setterblad, Niclas; Alberdi, Antonio J.; Vicini, Elena; Geremia, Raffaele; De la Grange, Pierre; Sette, Claudio. - In: DEVELOPMENTAL CELL. - ISSN 1534-5807. - STAMPA. - 41:1(2017), pp. 82-93. [10.1016/j.devcel.2017.03.003]

An orchestrated intron retention program in meiosis controls timely usage of transcripts during germ cell differentiation

DI PERSIO, SARA;VICINI, Elena;
2017

Abstract

Global transcriptome reprogramming during sper-matogenesis ensures timely expression of factors in each phase of male germ cell differentiation. Sper-matocytes and spermatids require particularly exten-sive reprogramming of gene expression to switch from mitosis to meiosis and to support gamete morphogenesis. Here, we uncovered an extensive alternative splicing program during this transmeiotic differentiation. Notably, intron retention was largely the most enriched pattern, with spermatocytes showing generally higher levels of retention compared with spermatids. Retained introns are characterized by weak splice sites and are enriched in genes with strong relevance for gamete func-tion. Meiotic intron-retaining transcripts (IRTs) were exclusively localized in the nucleus. However, differ-ently from other developmentally regulated IRTs, they are stable RNAs, showing longer half-life than properly spliced transcripts. Strikingly, fate-mapping experiments revealed that IRTs are recruited onto polyribosomes days after synthesis. These studies reveal an unexpected function for regulated intron retention in modulation of the timely expression of select transcripts during spermatogenesis.
2017
alternative splicing; germ cell differentiation; intron retention; mRNA stability; spermatogenesis; transcriptome profiling; Developmental Biology
01 Pubblicazione su rivista::01a Articolo in rivista
An orchestrated intron retention program in meiosis controls timely usage of transcripts during germ cell differentiation / Naro, Chiara; Jolly, Ariane; DI PERSIO, Sara; Bielli, Pamela; Setterblad, Niclas; Alberdi, Antonio J.; Vicini, Elena; Geremia, Raffaele; De la Grange, Pierre; Sette, Claudio. - In: DEVELOPMENTAL CELL. - ISSN 1534-5807. - STAMPA. - 41:1(2017), pp. 82-93. [10.1016/j.devcel.2017.03.003]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/954510
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