1.Temperature-induced Artifacts in Tau Phosphorylation:Implications for Reliable Alzheimer’s Disease Research
Geoffrey CANET ; Emma ROCABOY ; Francis LALIBERTÉ ; Emmanuelle BOSCHER ; Isabelle GUISLE ; Sofia DIEGO-DIAZ ; Parissa FEREYDOUNI-FOROUZANDEH ; Robert A. WHITTINGTON ; Sébastien S. HÉBERT ; Vincent PERNET ; Emmanuel PLANEL
Experimental Neurobiology 2023;32(6):423-440
In preclinical research on Alzheimer’s disease and related tauopathies, tau phosphorylation analysis is routinely employed in both cellular and animal models. However, recognizing the sensitivity of tau phosphorylation to various extrinsic factors, notably temperature, is vital for experimental accuracy. Hypothermia can trigger tau hyperphosphorylation, while hyperthermia leads to its dephosphorylation. Nevertheless, the rapidity of tau phosphorylation in response to unintentional temperature variations remains unknown. In cell cultures, the most significant temperature change occurs when the cells are removed from the incubator before harvesting, and in animal models, during anesthesia prior to euthanasia. In this study, we investigate the kinetics of tau phosphorylation in N2a and SH-SY5Y neuronal cell lines, as well as in mice exposed to anesthesia. We observed changes in tau phosphorylation within the few seconds upon transferring cell cultures from their 37°C incubator to room temperature conditions.However, cells placed directly on ice post-incubation exhibited negligible phosphorylation changes. In vivo, isoflurane anesthesia rapidly resulted in tau hyperphosphorylation within the few seconds needed to lose the pedal withdrawal reflex in mice. These findings emphasize the critical importance of preventing temperature variation in researches focused on tau. To ensure accurate results, we recommend avoiding anesthesia before euthanasia and promptly placing cells on ice after removal from the incubator. By controlling temperature fluctuations, the reliability and validity of tau phosphorylation studies can be significantly enhanced.
2.Difficulties in Manipulating the Female Artificial Urinary Sphincter Pump: Prevalence and Management
Alexandre DUBOIS ; Valentine LETHUILLIER ; Claire RICHARD ; Camille HAUDEBERT ; Juan PENAFIEL ; Caroline VOIRY ; Magali JEZEQUEL ; Emmanuelle EMMANUEL ; Ouis-Paul BERTHELOT ; Lucas FRETON ; Juliette HASCOET ; Andrea MANUNTA ; Benoit PEYRONNET
International Neurourology Journal 2024;28(4):294-301
Purpose:
While pump manipulation is rarely problematic in male patients with artificial urinary sphincters (AUSs), the situation may differ in female patients due to anatomical or cultural factors. This study aimed to evaluate the prevalence of difficulties in pump manipulation among female AUS patients, identify associated risk factors, and explore management strategies for this challenging issue.
Methods:
Data were collected from all female patients who underwent a robotic AUS implantation at a single academic center between 2014 and 2022. The primary endpoint was temporary difficulties, defined by at least one other short hospitalization to learn pump manipulation.
Results:
Out of the 88 female AUS patients included in the study, 20 experienced initial difficulties manipulating the pump, accounting for 22.7% of the group. Temporary difficulties were reported by 16 patients (18.2%), while 4 patients (4.5%) had their devices permanently deactivated. Surgical reoperations to reposition the pump were necessary for 5 patients, representing 5.6% of the sample. The only variables significantly associated with temporary difficulties were longer operative time (183.4 minutes vs. 159.1 minutes, P=0.04) and the overall experience of the center (32 vs. 50, P=0.04). The sole variable significantly linked to serious difficulties was the overall experience of the center (11 vs. 47, P=0.004). Although the median age and body mass index were higher in the group with temporary difficulties, these differences were not statistically significant.
Conclusions
Difficulties in manipulating the pump are relatively common among female AUS patients. Most of these difficulties can be resolved through repeated patient education and careful follow-up. However, some may lead to serious complications. Raising awareness of this issue, along with ongoing patient education and meticulous follow-up, may help to minimize these consequences.
3.Difficulties in Manipulating the Female Artificial Urinary Sphincter Pump: Prevalence and Management
Alexandre DUBOIS ; Valentine LETHUILLIER ; Claire RICHARD ; Camille HAUDEBERT ; Juan PENAFIEL ; Caroline VOIRY ; Magali JEZEQUEL ; Emmanuelle EMMANUEL ; Ouis-Paul BERTHELOT ; Lucas FRETON ; Juliette HASCOET ; Andrea MANUNTA ; Benoit PEYRONNET
International Neurourology Journal 2024;28(4):294-301
Purpose:
While pump manipulation is rarely problematic in male patients with artificial urinary sphincters (AUSs), the situation may differ in female patients due to anatomical or cultural factors. This study aimed to evaluate the prevalence of difficulties in pump manipulation among female AUS patients, identify associated risk factors, and explore management strategies for this challenging issue.
Methods:
Data were collected from all female patients who underwent a robotic AUS implantation at a single academic center between 2014 and 2022. The primary endpoint was temporary difficulties, defined by at least one other short hospitalization to learn pump manipulation.
Results:
Out of the 88 female AUS patients included in the study, 20 experienced initial difficulties manipulating the pump, accounting for 22.7% of the group. Temporary difficulties were reported by 16 patients (18.2%), while 4 patients (4.5%) had their devices permanently deactivated. Surgical reoperations to reposition the pump were necessary for 5 patients, representing 5.6% of the sample. The only variables significantly associated with temporary difficulties were longer operative time (183.4 minutes vs. 159.1 minutes, P=0.04) and the overall experience of the center (32 vs. 50, P=0.04). The sole variable significantly linked to serious difficulties was the overall experience of the center (11 vs. 47, P=0.004). Although the median age and body mass index were higher in the group with temporary difficulties, these differences were not statistically significant.
Conclusions
Difficulties in manipulating the pump are relatively common among female AUS patients. Most of these difficulties can be resolved through repeated patient education and careful follow-up. However, some may lead to serious complications. Raising awareness of this issue, along with ongoing patient education and meticulous follow-up, may help to minimize these consequences.
4.Difficulties in Manipulating the Female Artificial Urinary Sphincter Pump: Prevalence and Management
Alexandre DUBOIS ; Valentine LETHUILLIER ; Claire RICHARD ; Camille HAUDEBERT ; Juan PENAFIEL ; Caroline VOIRY ; Magali JEZEQUEL ; Emmanuelle EMMANUEL ; Ouis-Paul BERTHELOT ; Lucas FRETON ; Juliette HASCOET ; Andrea MANUNTA ; Benoit PEYRONNET
International Neurourology Journal 2024;28(4):294-301
Purpose:
While pump manipulation is rarely problematic in male patients with artificial urinary sphincters (AUSs), the situation may differ in female patients due to anatomical or cultural factors. This study aimed to evaluate the prevalence of difficulties in pump manipulation among female AUS patients, identify associated risk factors, and explore management strategies for this challenging issue.
Methods:
Data were collected from all female patients who underwent a robotic AUS implantation at a single academic center between 2014 and 2022. The primary endpoint was temporary difficulties, defined by at least one other short hospitalization to learn pump manipulation.
Results:
Out of the 88 female AUS patients included in the study, 20 experienced initial difficulties manipulating the pump, accounting for 22.7% of the group. Temporary difficulties were reported by 16 patients (18.2%), while 4 patients (4.5%) had their devices permanently deactivated. Surgical reoperations to reposition the pump were necessary for 5 patients, representing 5.6% of the sample. The only variables significantly associated with temporary difficulties were longer operative time (183.4 minutes vs. 159.1 minutes, P=0.04) and the overall experience of the center (32 vs. 50, P=0.04). The sole variable significantly linked to serious difficulties was the overall experience of the center (11 vs. 47, P=0.004). Although the median age and body mass index were higher in the group with temporary difficulties, these differences were not statistically significant.
Conclusions
Difficulties in manipulating the pump are relatively common among female AUS patients. Most of these difficulties can be resolved through repeated patient education and careful follow-up. However, some may lead to serious complications. Raising awareness of this issue, along with ongoing patient education and meticulous follow-up, may help to minimize these consequences.