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Metayer T, Lechanoine F, Bougaci N, de Schlichting E, Terrier L, Derrey S, Barbier C, Papagiannaki C, Ashraf A, Tahon F, Leplus A, Gay E, Emery E, Briant AR, Vivien D, Gaberel T. Retreatment of previously treated intracranial aneurysm: Procedural complications and risk factors for complications. Neurochirurgie 2021; 68:150-155. [PMID: 34487752 DOI: 10.1016/j.neuchi.2021.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/23/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Intracranial aneurysm (IA) is a frequent vascular malformation that can be managed by endovascular treatment (EVT) or microsurgery. A previously treated IA can recanalize, which may require further treatment. The aim of our study was to evaluate procedural complications related to IA retreatment and their risk factors. METHODS All patients retreated for IA between 2007 and 2017 in 4 hospitals were included. We retrospectively reviewed the frequency of procedural complications of IA retreatment, defined as death or≥1-point increase in modified Rankin score 24h after the procedure. We then screened for risk factors of procedural complications by comparing the characteristics of patients with and without complications. RESULTS During the inclusion period, 4,997 IAs were treated in our 4 institutions. Of these, 237 (4.7%) were retreated. 29 (12.2%) had≥1 procedural complication. However, severe complications, defined as death or dependency at 1 month, occurred only in 3 patients (1.3%). The only risk factor for complications was microsurgical clipping as retreatment. CONCLUSIONS Procedural complications during IA retreatment were frequent but, in most cases, retreatment did not lead to death or severe disability. The only risk factor for complications of IA retreatment was clipping as retreatment. However, the design of the study did not allow any conclusion to be drawn as to the optimal means of aneurysm retreatment, and further studies are needed.
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Affiliation(s)
- T Metayer
- Department of Neurosurgery, University Hospital of Caen, Avenue de la Côte de Nacre, 14000 Caen, France; Normandie Univ, UNICAEN, INSERM, U1237, PhIND "Physiopathology and Imaging of Neurological Disorders", Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France.
| | - F Lechanoine
- Department of Neurosurgery, University Hospital of Grenoble, 38000 Grenoble, France
| | - N Bougaci
- Department of Neurosurgery, University Hospital of Nice, 06000 Nice, France
| | - E de Schlichting
- Department of Neurosurgery, University Hospital of Grenoble, 38000 Grenoble, France
| | - L Terrier
- Department of Neurosurgery, University Hospital of Rouen, 76000 Rouen, France
| | - S Derrey
- Department of Neurosurgery, University Hospital of Nice, 06000 Nice, France
| | - C Barbier
- Department of Neurosurgery, University Hospital of Rouen, 76000 Rouen, France; Department of Biostatistics, University Hospital of Caen, Caen, France
| | - C Papagiannaki
- Department of Neuroradiology, University Hospital of Caen, 14000 Caen, France
| | - A Ashraf
- Department of Neurosurgery, University Hospital of Grenoble, 38000 Grenoble, France
| | - F Tahon
- Department of Neuroradiology, University Hospital of Rouen, 76000 Rouen, France
| | - A Leplus
- Department of Neurosurgery, University Hospital of Nice, 06000 Nice, France
| | - E Gay
- Department of Neurosurgery, University Hospital of Grenoble, 38000 Grenoble, France
| | - E Emery
- Department of Neurosurgery, University Hospital of Caen, Avenue de la Côte de Nacre, 14000 Caen, France; Department of Neuroradiology, University Hospital of Grenoble, 38000 Grenoble, France
| | - A R Briant
- Medical School, University of Caen Normandy, 14000 Caen, France; Department of Biostatistics, University Hospital of Caen, Caen, France
| | - D Vivien
- Normandie Univ, UNICAEN, INSERM, U1237, PhIND "Physiopathology and Imaging of Neurological Disorders", Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France; Department of Neuroradiology, University Hospital of Grenoble, 38000 Grenoble, France
| | - T Gaberel
- Department of Neurosurgery, University Hospital of Caen, Avenue de la Côte de Nacre, 14000 Caen, France; Normandie Univ, UNICAEN, INSERM, U1237, PhIND "Physiopathology and Imaging of Neurological Disorders", Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France.
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Vanrobays E, Leplus A, Osheim YN, Beyer AL, Wacheul L, Lafontaine DLJ. TOR regulates the subcellular distribution of DIM2, a KH domain protein required for cotranscriptional ribosome assembly and pre-40S ribosome export. RNA 2008; 14:2061-73. [PMID: 18755838 PMCID: PMC2553727 DOI: 10.1261/rna.1176708] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Accepted: 06/30/2008] [Indexed: 05/20/2023]
Abstract
Eukaryotic ribosome synthesis is a highly dynamic process that involves the transient association of scores of trans-acting factors to nascent pre-ribosomes. Many ribosome synthesis factors are nucleocytoplasmic shuttling proteins that engage the assembly pathway at early nucleolar stages and escort pre-ribosomes to the nucleoplasm and/or the cytoplasm. Here, we report that two 40S ribosome synthesis factors, the KH-domain protein DIM2 and the HEAT-repeats/Armadillo-domain and export factor RRP12, are nucleolar restricted upon nutritional, osmotic, and oxidative stress. Nucleolar entrapment of DIM2 and RRP12 was triggered by rapamycin treatment and was under the strict control of the target of rapamycin (TOR) signaling cascade. DIM2 binds pre-rRNAs directly through its KH domain at the 5'-end of ITS1 (D-A(2) segment) and, consistent with its requirements in early nucleolar pre-rRNA processing, is required for efficient cotranscriptional ribosome assembly. The substitution of a single and highly conserved amino acid (G207A) within the KH motif is sufficient to inhibit pre-rRNA processing in a fashion similar to genetic depletion of DIM2. DIM2 carries an evolutionarily conserved putative nuclear export sequence (NES) at its carboxyl-terminal end that is required for efficient pre-40S ribosome export. Strikingly, DIM2 and RRP12 are both involved in the nucleocytoplasmic translocation of pre-ribosomes, suggesting that this step in the ribosome assembly pathway has been selected as a regulatory target for the TOR pathway.
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Affiliation(s)
- Emmanuel Vanrobays
- Fonds de la Recherche Scientifique (FRS-FNRS), Académie Wallonie-Bruxelles, Institut de Biologie et de Médecine Moléculaires, Université Libre de Bruxelles, Charleroi-Gosselies, B-6041, Belgium
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