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Creff J, Nowosad A, Prel A, Pizzoccaro A, Aguirrebengoa M, Duquesnes N, Callot C, Jungas T, Dozier C, Besson A. p57 Kip2 acts as a transcriptional corepressor to regulate intestinal stem cell fate and proliferation. Cell Rep 2023; 42:112659. [PMID: 37327110 DOI: 10.1016/j.celrep.2023.112659] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/01/2022] [Accepted: 06/01/2023] [Indexed: 06/18/2023] Open
Abstract
p57Kip2 is a cyclin/CDK inhibitor and a negative regulator of cell proliferation. Here, we report that p57 regulates intestinal stem cell (ISC) fate and proliferation in a CDK-independent manner during intestinal development. In the absence of p57, intestinal crypts exhibit an increased proliferation and an amplification of transit-amplifying cells and of Hopx+ ISCs, which are no longer quiescent, while Lgr5+ ISCs are unaffected. RNA sequencing (RNA-seq) analyses of Hopx+ ISCs show major gene expression changes in the absence of p57. We found that p57 binds to and inhibits the activity of Ascl2, a transcription factor critical for ISC specification and maintenance, by participating in the recruitment of a corepressor complex to Ascl2 target gene promoters. Thus, our data suggest that, during intestinal development, p57 plays a key role in maintaining Hopx+ ISC quiescence and repressing the ISC phenotype outside of the crypt bottom by inhibiting the transcription factor Ascl2 in a CDK-independent manner.
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Affiliation(s)
- Justine Creff
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Ada Nowosad
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Anne Prel
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Anne Pizzoccaro
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Marion Aguirrebengoa
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Nicolas Duquesnes
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Caroline Callot
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Thomas Jungas
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Christine Dozier
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Arnaud Besson
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France.
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Prel A, Dozier C, Combier JP, Plaza S, Besson A. Evidence That Regulation of Pri-miRNA/miRNA Expression Is Not a General Rule of miPEPs Function in Humans. Int J Mol Sci 2021; 22:ijms22073432. [PMID: 33810468 PMCID: PMC8038077 DOI: 10.3390/ijms22073432] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/11/2021] [Accepted: 03/22/2021] [Indexed: 01/07/2023] Open
Abstract
Some miRNAs are located in RNA precursors (pri-miRNAs) annotated as long non-coding (lncRNAs) due to absence of long open reading frames (ORFs). However, recent studies have shown that some lnc pri-miRNAs encode peptides called miPEPs (miRNA-encoded peptides). Initially discovered in plants, three miPEPs have also been identified in humans. Herein, we found that a dozen human pri-miRNAs potentially encode miPEPs, as revealed by ribosome profiling and proteomic databases survey. So far, the only known function of plant miPEPs is to enhance the transcription of their own pri-miRNAs, thereby increasing the level and activity of their associated miRNAs and downregulating the expression of their target genes. To date, in humans, only miPEP133 was shown to promote a positive autoregulatory loop. We investigated whether other human miPEPs are also involved in regulating the expression of their miRNAs by studying miPEP155, encoded by the lnc MIR155HG, miPEP497, a sORF-encoded peptide within lnc MIR497HG, and miPEP200a, encoded by the pri-miRNA of miR-200a/miR-200b. We show that overexpression of these miPEPs is unable to impact the expression/activity of their own pri-miRNA/miRNAs in humans, indicating that the positive feedback regulation observed with plant miPEPs and human miPEP133 is not a general rule of human miPEP function.
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Affiliation(s)
- Anne Prel
- Laboratoire de Recherche en Sciences Végétales, UMR5546 CNRS, UPS Université de Toulouse, 31320 Auzeville-Tolosan, France; (A.P.); (J.-P.C.)
| | - Christine Dozier
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Integrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France;
- Correspondence: (C.D.); (S.P.)
| | - Jean-Philippe Combier
- Laboratoire de Recherche en Sciences Végétales, UMR5546 CNRS, UPS Université de Toulouse, 31320 Auzeville-Tolosan, France; (A.P.); (J.-P.C.)
| | - Serge Plaza
- Laboratoire de Recherche en Sciences Végétales, UMR5546 CNRS, UPS Université de Toulouse, 31320 Auzeville-Tolosan, France; (A.P.); (J.-P.C.)
- Correspondence: (C.D.); (S.P.)
| | - Arnaud Besson
- Molecular, Cellular and Developmental Biology Department (MCD), Centre de Biologie Integrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse, France;
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Prel A, Labat E, Pontikoglou C, Trichet V, Langonné A, Pagès J, Sensebé L, Deschaseaux F. HSA-MIR152 modulate osteoblastic and adipocytic differentiation through inhibition of the mitochondriogenic factor peroxisome proliferator-activated receptor gamma co-activator 1A (PPRGC1A). Cytotherapy 2014. [DOI: 10.1016/j.jcyt.2014.01.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Prel A, Sensébé L, Pagès JC. Influence of untranslated regions on retroviral mRNA transfer and expression. BMC Biotechnol 2013; 13:35. [PMID: 23586982 PMCID: PMC3640953 DOI: 10.1186/1472-6750-13-35] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 04/12/2013] [Indexed: 12/16/2022] Open
Abstract
Background Deliberate cellular reprogramming is becoming a realistic objective in the clinic. While the origin of the target cells is critical, delivery of bioactive molecules to trigger a shift in cell-fate remains the major hurdle. To date, several strategies based either on non-integrative vectors, protein transfer or mRNA delivery have been investigated. In a recent study, a unique modification in the retroviral genome was shown to enable RNA transfer and its expression. Results Here, we used the retroviral mRNA delivery approach to study the impact of modifying gene-flanking sequences on RNA transfer. We designed modified mRNAs for retroviral packaging and used the quantitative luciferase assay to compare mRNA expression following viral transduction of cells. Cloning the untranslated regions of the vimentin or non-muscular myosin heavy chain within transcripts improved expression and stability of the reporter gene while slightly modifying reporter-RNA retroviral delivery. We also observed that while the modified retroviral platform was the most effective for retroviral mRNA packaging, the highest expression in target cells was achieved by the addition of a non-viral UTR to mRNAs containing the packaging signal. Conclusions Through molecular engineering we have assayed a series of constructs to improve retroviral mRNA transfer. We showed that an authentic RNA retroviral genomic platform was most efficiently transferred but that adding UTR sequences from highly expressed genes could improve expression upon transfection while having only a slight effect on expression from transferred RNA. Together, these data should contribute to the optimisation of retroviral mRNA-delivery systems that test combinations of UTRs and packaging platforms.
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Affiliation(s)
- Anne Prel
- INSERM U966, Faculté de Médecine, Université François Rabelais, Tours 37000, France
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Prel A, Le Gall-Reculé G, Jestin V. Achievement of avian influenza virus-like particles that could be used as a subunit vaccine against low-pathogenic avian influenza strains in ducks. Avian Pathol 2008; 37:513-20. [DOI: 10.1080/03079450802357001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Anne Prel
- a French Agency for Food Safety (AFSSA), Avian and Rabbit Virology, Immunology and Parasitology Unit , French Reference Laboratory for Avian Influenza and Newcastle Disease , B.P. 53, 22440, Ploufragan , France
| | - Ghislaine Le Gall-Reculé
- a French Agency for Food Safety (AFSSA), Avian and Rabbit Virology, Immunology and Parasitology Unit , French Reference Laboratory for Avian Influenza and Newcastle Disease , B.P. 53, 22440, Ploufragan , France
| | - Véronique Jestin
- a French Agency for Food Safety (AFSSA), Avian and Rabbit Virology, Immunology and Parasitology Unit , French Reference Laboratory for Avian Influenza and Newcastle Disease , B.P. 53, 22440, Ploufragan , France
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Prel A, Le Gall-Reculé G, Cherbonnel M, Grasland B, Amelot M, Jestin V. Assessment of the Protection Afforded by Triple Baculovirus Recombinant Coexpressing H5, N3, M1 Proteins Against a Homologous H5N3 Low-Pathogenicity Avian Influenza Virus Challenge in Muscovy Ducks. Avian Dis 2007; 51:484-9. [PMID: 17494615 DOI: 10.1637/7683-072106r.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In Asia, domestic ducks have been shown to play a pivotal role in H5 high-pathogenicity avian influenza virus transmission. We have also observed that the same situation may exist for H5 low-pathogenicity avian influenza (LPAI) virus. No data are available regarding the protection afforded by commercial inactivated vaccines against H5 LPAI virus infection in ducks, and two preliminary experiments using commercial inactivated vaccines gave poor results. Virus-like particles (VLPs) have been shown to be immunogenic in different species. With regard to the influenza model, the matrix (M) protein has been shown to be necessary for the formation of VLPs. In order to attempt to develop a VLP influenza vaccine expressing hemagglutinin and neuraminidase (NA) of interest, we generated a triple recombinant baculovirus (rB) expressing three structural proteins: H5, N3, and M, derived from a recent French LPAI virus strain. Although the three proteins were successfully expressed in rB-infected cells and displayed the expected biological activity, no VLPs were observed. Despite this result, the protection afforded to ducks by rB-infected cell lysates was assessed and was compared with the protection afforded by an inactivated commercial H5N9 vaccine. For this purpose, specific-pathogen-free Muscovy ducks (15 per group) received rB-infected cell lysates (3 wk apart), while a second group received the H5N9 vaccine. Ten days after the boost, a homologous virus challenge was implemented. Both vaccines induced positive hemagglutination inhibition titers and M immune response, whereas lysates of rB-infected cells elicited NA immune response. Tracheal and cloacal sheddings were measured using M-based real-time-reverse transcription-polymerase chain reaction and were compared with the sheddings of vaccinated and unvaccinated infected controls. Lysates of rB-infected cells afforded a significant decrease of cloacal shedding and a delayed peak of tracheal shedding, whereas the inactivated commercial vaccine afforded a significant decrease of tracheal shedding only.
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Affiliation(s)
- Anne Prel
- AFSSA, Swine and Poultry Research Laboratory, French National Reference Laboratory for Avian Influenza and Newcastle Disease, Avian and Rabbit Virology, Immunology and Parasitology Unit, B.P. 53, 22440 Ploufragan, France
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Clastre M, Goubard A, Prel A, Mincheva Z, Viaud-Massuart MC, Bout D, Rideau M, Velge-Roussel F, Laurent F. The methylerythritol phosphate pathway for isoprenoid biosynthesis in coccidia: presence and sensitivity to fosmidomycin. Exp Parasitol 2007; 116:375-84. [PMID: 17399705 DOI: 10.1016/j.exppara.2007.02.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2006] [Revised: 02/04/2007] [Accepted: 02/09/2007] [Indexed: 11/16/2022]
Abstract
The apicoplast is a recently discovered, plastid-like organelle present in most apicomplexa. The methylerythritol phosphate (MEP) pathway involved in isoprenoid biosynthesis is one of the metabolic pathways associated with the apicoplast, and is a new promising therapeutic target in Plasmodium falciparum. Here, we check the presence of isoprenoid genes in four coccidian parasites according to genome database searches. Cryptosporidium parvum and C. hominis, which have no plastid genome, lack the MEP pathway. In contrast, gene expression studies suggest that this metabolic pathway is present in several development stages of Eimeria tenella and in tachyzoites of Toxoplasma gondii. We studied the potential of fosmidomycin, an antimalarial drug blocking the MEP pathway, to inhibit E. tenella and T. gondii growth in vitro. The drug was poorly effective even at high concentrations. Thus, both fosmidomycin sensitivity and isoprenoid metabolism differs substantially between apicomplexan species.
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Affiliation(s)
- Marc Clastre
- EA2106 Biomolécules et Biotechnologies Végétales, UFR Sciences Pharmaceutiques, Université de Tours, 37200 Tours, France
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