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Noel K, Bokhari A', Bertrand R, Renaud F, Bourgoin P, Cohen R, Svrcek M, Joly AC, Duval A, Collura A. Consequences of the Hsp110DE9 mutation in tumorigenesis and the 5-fluorouracil-based chemotherapy response in Msh2-deficient mice. Cell Mol Life Sci 2022; 79:332. [PMID: 35648235 PMCID: PMC11072706 DOI: 10.1007/s00018-022-04293-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/22/2022] [Accepted: 04/06/2022] [Indexed: 11/03/2022]
Abstract
Heat shock proteins (HSPs) play oncogenic roles in human tumours. We reported a somatic inactivating mutation of HSP110 (HSP110DE9) in mismatch repair-deficient (dMMR) cancers displaying microsatellite instability (MSI) but did not assess its impact. We evaluated the impact of the Hsp110DE9 mutation on tumour development and the chemotherapy response in a dMMR knock-in mouse model (Hsp110DE9KIMsh2KO mice). The effect of the Hsp110DE9 mutation on tumorigenesis and survival was evaluated in Msh2KO mice that were null (Hsp110wt), heterozygous (Hsp110DE9KI/+), or homozygous (Hsp110DE9KI/KI) for the Hsp110DE9 mutation by assessing tumoral syndrome (organomegaly index, tumour staging) and survival (Kaplan-Meier curves). 5-Fluorouracil (5-FU), which is the backbone of chemotherapy regimens in gastrointestinal cancers and is commonly used in other tumour types but is not effective against dMMR cells in vivo, was administered to Hsp110DE9KI/KI, Hsp110DE9KI/+, and Hsp110wtMsh2KO mice. Hsp110, Ki67 (proliferation marker) and activated caspase-3 (apoptosis marker) expression were assessed in normal and tumour tissue samples by western blotting, immunophenotyping and cell sorting. Hsp110wt expression was drastically reduced or totally lost in tumours from Msh2KOHsp110DE9KI/+ and Msh2KOHsp110DE9KI/KI mice. The Hsp110DE9 mutation did not affect overall survival or tumoral syndrome in Msh2KOHsp110DE9KI/+ and Msh2KOHsp110DE9KI/KI mice but drastically improved the 5-FU response in all cohorts (Msh2KOHsp110DE9KI/KI: P5fu = 0.001; Msh2KOHsp110DE9KI/+: P5fu = 0.005; Msh2KOHsp110wt: P5fu = 0.335). Histopathological examination and cell sorting analyses confirmed major hypersensitization to 5-FU-induced death of both Hsp110DE9KI/KI and Hsp110DE9KI/+ dMMR cancer cells. This study highlights how dMMR tumour cells adapt to HSP110 inactivation but become hypersensitive to 5-FU, suggesting Hsp110DE9 as a predictive factor of 5-FU efficacy.
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Affiliation(s)
- Kathleen Noel
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
| | - A 'dem Bokhari
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
| | - Romane Bertrand
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
| | - Florence Renaud
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
| | - Pierre Bourgoin
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
| | - Romain Cohen
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
- Sorbonne Université, Service D'oncologie Médicale, Hôpital Saint-Antoine, AP-HP, 75012, Paris, France
| | - Magali Svrcek
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
- Sorbonne Université, Laboratoire D'anatomie Et Cytologie Pathologiques, Hôpital Saint-Antoine, AP-HP, 75012, Paris, France
| | - Anne-Christine Joly
- UPAC and C (Unité De Préparation Des Anticancéreux Et Contrôle), Saint Antoine Hospital, AP-HP, Paris, France
| | - Alex Duval
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France
| | - Ada Collura
- Sorbonne Université, UPMC Univ Paris 06, INSERM, UMRS 938, SIRIC CURAMUS, Equipe Instabilité Des Microsatellites Et Cancer, Equipe Labellisée Par La Ligue Contre Le Cancer, Centre de Recherche Saint Antoine, 75012, Paris, France.
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Dicer is required for proliferation, viability, migration and differentiation in corticoneurogenesis. Neuroscience 2012; 223:285-95. [PMID: 22898830 DOI: 10.1016/j.neuroscience.2012.08.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 07/17/2012] [Accepted: 08/04/2012] [Indexed: 11/21/2022]
Abstract
In mice, microRNAs (miRNAs) are required for embryonic viability, and previous reports implicate miRNA participation in brain cortical neurogenesis. Here, we provide a more comprehensive analysis of miRNA involvement in cortical brain development. To accomplish this we used mice in which Dicer, the RNase III enzyme necessary for canonical miRNA biogenesis, is depleted from Nestin-expressing progenitors and progeny cells. We systematically assessed how Dicer depletion impacts proliferation, cell death, migration and differentiation in the developing brain. Using markers for proliferation and in vivo labeling with thymidine analogs, we found reduced numbers of proliferating cells, and altered cell cycle kinetics from embryonic day 15.5 (E15.5). Progenitor cells were distributed aberrantly throughout the cortex rather than restricted to the ventricular and subventricular zones. Activated Caspase3 was elevated, reflecting increased cortical cell death as early as E15.5. Cajal-Retzius-positive cells were more numerous at E15.5 and were dysmorphic relative to control cortices. Consistent with this, Reelin levels were enhanced. Doublecortin and Rnd2 were also increased and showed altered distribution, supporting a strong regulatory role for miRNAs in both early and late neuronal migration. In addition, GFAP staining at E15.5 was more intense and disorganized throughout the cortex with Dicer depletion. These results significantly extend earlier works, and emphasize the impact of miRNAs on neural progenitor cell proliferation, apoptosis, migration, and differentiation in the developing mammalian brain.
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