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Schneidereit D, Bauer J, Mnuskina S, Nübler S, Cacciani N, Mühlberg A, Kreiss L, Ritter P, Schürmann S, Larsson L, Friedrich O. CAS3D: 3D quantitative morphometry on Second Harmonic Generation image volumes from single skeletal muscle fibers. Comput Biol Med 2024; 178:108618. [PMID: 38925088 DOI: 10.1016/j.compbiomed.2024.108618] [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: 01/12/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 06/28/2024]
Abstract
The CAS3D image processing method intuitively applies a combination of Fourier space and real space 3D analysis algorithms to volumetric images of single skeletal muscle fiber Myosin II Second Harmonic Generation (SHG) XYZ image data. Our developed tool automatically quantifies the myofibrillar orientation in muscle samples by determining the cosine angle sum of intensity gradients in 3D (CAS3D) while determining the mean sarcomere length (SL) and sample orientation. The expected CAS3D values could be reproduced from ideal artificial data sets. Applied random noise in artificial images lowers the detected CAS3D value, and for noise levels below 20%, the correlation can be approximated by a linear function with a slope of -0.006 CAS3D/noise%. The deviations in SL and orientation detection were determined on ideal and noisy artificial data sets and were statistically indistinguishable from 0 (null hypothesis t-test P > 0.1). The software was applied to a previously published data set of single skeletal muscle fiber volumetric SHG image data from a rat intensive care unit (ICU) model of ventilator-induced diaphragm dysfunction (VIDD) with treatment regimens involving the small anti-inflammatory molecules BGP-15, vamorolone, or prednisolone. Our method reliably reproduced the results of the previous work and improved the standard deviation of the cosine angle sum detection in all sample groups from a mean of 0.03 to 0.008. This improvement is achieved by applying analysis algorithms to the whole volumetric images in 3D in contrast to the previously common method of slice-wise XY analysis.
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Affiliation(s)
- Dominik Schneidereit
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany.
| | - Julian Bauer
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
| | - Sofia Mnuskina
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
| | - Stefanie Nübler
- Medical Faculty, IPASUM, Friedrich-Alexander Universität Erlangen-Nürnberg, Kochstrasse 19, 91054 Erlangen, Germany
| | - Nicola Cacciani
- Department of Physiology and Pharmacology, Karolinska Institutet, Solnavaegen 30, 17164 Stockholm, Sweden
| | - Alexander Mühlberg
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
| | - Lucas Kreiss
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
| | - Paul Ritter
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
| | - Sebastian Schürmann
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
| | - Lars Larsson
- Department of Physiology and Pharmacology, Karolinska Institutet, Solnavaegen 30, 17164 Stockholm, Sweden
| | - Oliver Friedrich
- Institute of Medical Biotechnology, Friedrich-Alexander Universität Erlangen-Nürnberg, Paul-Gordan-Strasse 3, 91052 Erlangn, Germany
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Mühlberg A, Ritter P, Langer S, Goossens C, Nübler S, Schneidereit D, Taubmann O, Denzinger F, Nörenberg D, Haug M, Schürmann S, Horstmeyer R, Maier AK, Goldmann WH, Friedrich O, Kreiss L. SEMPAI: a Self-Enhancing Multi-Photon Artificial Intelligence for Prior-Informed Assessment of Muscle Function and Pathology. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206319. [PMID: 37582656 PMCID: PMC10558688 DOI: 10.1002/advs.202206319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 06/30/2023] [Indexed: 08/17/2023]
Abstract
Deep learning (DL) shows notable success in biomedical studies. However, most DL algorithms work as black boxes, exclude biomedical experts, and need extensive data. This is especially problematic for fundamental research in the laboratory, where often only small and sparse data are available and the objective is knowledge discovery rather than automation. Furthermore, basic research is usually hypothesis-driven and extensive prior knowledge (priors) exists. To address this, the Self-Enhancing Multi-Photon Artificial Intelligence (SEMPAI) that is designed for multiphoton microscopy (MPM)-based laboratory research is presented. It utilizes meta-learning to optimize prior (and hypothesis) integration, data representation, and neural network architecture simultaneously. By this, the method allows hypothesis testing with DL and provides interpretable feedback about the origin of biological information in 3D images. SEMPAI performs multi-task learning of several related tasks to enable prediction for small datasets. SEMPAI is applied on an extensive MPM database of single muscle fibers from a decade of experiments, resulting in the largest joint analysis of pathologies and function for single muscle fibers to date. It outperforms state-of-the-art biomarkers in six of seven prediction tasks, including those with scarce data. SEMPAI's DL models with integrated priors are superior to those without priors and to prior-only approaches.
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Affiliation(s)
- Alexander Mühlberg
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
| | - Paul Ritter
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
- Erlangen Graduate School in Advanced Optical TechnologiesPaul‐Gordan‐Str. 691052ErlangenGermany
| | - Simon Langer
- Pattern Recognition LabDepartment of Computer ScienceFriedrich‐Alexander University Erlangen‐NurembergMartensstr. 391058ErlangenGermany
| | - Chloë Goossens
- Clinical Division and Laboratory of Intensive Care MedicineKU LeuvenUZ Herestraat 49 – P.O. box 7003Leuven3000Belgium
| | - Stefanie Nübler
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
| | - Dominik Schneidereit
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
- Erlangen Graduate School in Advanced Optical TechnologiesPaul‐Gordan‐Str. 691052ErlangenGermany
| | - Oliver Taubmann
- Pattern Recognition LabDepartment of Computer ScienceFriedrich‐Alexander University Erlangen‐NurembergMartensstr. 391058ErlangenGermany
| | - Felix Denzinger
- Pattern Recognition LabDepartment of Computer ScienceFriedrich‐Alexander University Erlangen‐NurembergMartensstr. 391058ErlangenGermany
| | - Dominik Nörenberg
- Department of Radiology and Nuclear MedicineUniversity Medical Center MannheimMedical Faculty MannheimTheodor‐Kutzer‐Ufer 1–368167MannheimGermany
| | - Michael Haug
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
| | - Sebastian Schürmann
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
| | - Roarke Horstmeyer
- Computational Optics LabDepartment of Biomedical EngineeringDuke University101 Science DrDurhamNC27708USA
| | - Andreas K. Maier
- Pattern Recognition LabDepartment of Computer ScienceFriedrich‐Alexander University Erlangen‐NurembergMartensstr. 391058ErlangenGermany
| | - Wolfgang H. Goldmann
- Biophysics GroupDepartment of PhysicsFriedrich‐Alexander University Erlangen‐NurembergHenkestr. 9191052ErlangenGermany
| | - Oliver Friedrich
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
- Erlangen Graduate School in Advanced Optical TechnologiesPaul‐Gordan‐Str. 691052ErlangenGermany
| | - Lucas Kreiss
- Institute of Medical BiotechnologyDepartment of Chemical and Biological EngineeringFriedrich‐Alexander University Erlangen‐NurembergPaul‐Gordan‐Str. 391052ErlangenGermany
- Erlangen Graduate School in Advanced Optical TechnologiesPaul‐Gordan‐Str. 691052ErlangenGermany
- Computational Optics LabDepartment of Biomedical EngineeringDuke University101 Science DrDurhamNC27708USA
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Yang H, Wan XX, Ma H, Li Z, Weng L, Xia Y, Zhang XM. Prevalence and mortality risk of low skeletal muscle mass in critically ill patients: an updated systematic review and meta-analysis. Front Nutr 2023; 10:1117558. [PMID: 37252244 PMCID: PMC10213681 DOI: 10.3389/fnut.2023.1117558] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 04/11/2023] [Indexed: 05/31/2023] Open
Abstract
Background Patients with critical illness often develop low skeletal muscle mass (LSMM) for multiple reasons. Numerous studies have explored the association between LSMM and mortality. The prevalence of LSMM and its association with mortality are unclear. This systematic review and meta-analysis was performed to examine the prevalence and mortality risk of LSMM among critically ill patients. Methods Three internet databases (Embase, PubMed, and Web of Science) were searched by two independent investigators to identify relevant studies. A random-effects model was used to pool the prevalence of LSMM and its association with mortality. The GRADE assessment tool was used to assess the overall quality of evidence. Results In total, 1,582 records were initially identified in our search, and 38 studies involving 6,891 patients were included in the final quantitative analysis. The pooled prevalence of LSMM was 51.0% [95% confidence interval (CI), 44.5-57.5%]. The subgroup analysis showed that the prevalence of LSMM in patients with and without mechanical ventilation was 53.4% (95% CI, 43.2-63.6%) and 48.9% (95% CI, 39.7-58.1%), respectively (P-value for difference = 0.44). The pooled results showed that critically ill patients with LSMM had a higher risk of mortality than those without LSMM, with a pooled odds ratio of 2.35 (95% CI, 1.91-2.89). The subgroup analysis based on the muscle mass assessment tool showed that critically ill patients with LSMM had a higher risk of mortality than those with normal skeletal muscle mass regardless of the different assessment tools used. In addition, the association between LSMM and mortality was statistically significant, independent of the different types of mortality. Conclusion Our study revealed that critically ill patients had a high prevalence of LSMM and that critically ill patients with LSMM had a higher risk of mortality than those without LSMM. However, large-scale and high-quality prospective cohort studies, especially those based on muscle ultrasound, are required to validate these findings. Systematic review registration http://www.crd.york.ac.uk/PROSPERO/, identifier: CRD42022379200.
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Affiliation(s)
- Hui Yang
- Department of Nursing, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
| | - Xi-Xi Wan
- Department of Medical Intensive Care Unit, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
| | - Hui Ma
- Department of Medical Intensive Care Unit, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
| | - Zhen Li
- Department of Urology, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
| | - Li Weng
- Department of Medical Intensive Care Unit, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
| | - Ying Xia
- Department of Medical Intensive Care Unit, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
| | - Xiao-Ming Zhang
- Department of Nursing, Chinese Academy of Medical Sciences-Peking Union Medical College Hospital, Beijing, China
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Redox Balance Differentially Affects Biomechanics in Permeabilized Single Muscle Fibres-Active and Passive Force Assessments with the Myorobot. Cells 2022; 11:cells11233715. [PMID: 36496975 PMCID: PMC9740451 DOI: 10.3390/cells11233715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 11/23/2022] Open
Abstract
An oxidizing redox state imposes unique effects on the contractile properties of muscle. Permeabilized fibres show reduced active force generation in the presence of H2O2. However, our knowledge about the muscle fibre's elasticity or flexibility is limited due to shortcomings in assessing the passive stress-strain properties, mostly due to technically limited experimental setups. The MyoRobot is an automated biomechatronics platform that is well-capable of not only investigating calcium responsiveness of active contraction but also features precise stretch actuation to examine the passive stress-strain behaviour. Both were carried out in a consecutive recording sequence on the same fibre for 10 single fibres in total. We denote a significantly diminished maximum calcium-saturated force for fibres exposed to ≥500 µM H2O2, with no marked alteration of the pCa50 value. In contrast to active contraction (e.g., maximum isometric force activation), passive restoration stress (force per area) significantly increases for fibres exposed to an oxidizing environment, as they showed a non-linear stress-strain relationship. Our data support the idea that a highly oxidizing environment promotes non-linear fibre stiffening and confirms that our MyoRobot platform is a suitable tool for investigating redox-related changes in muscle biomechanics.
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Li N, Yao M, Liu J, Zhu Z, Lam TL, Zhang P, Kiang KMY, Leung GKK. Vitamin D Promotes Remyelination by Suppressing c-Myc and Inducing Oligodendrocyte Precursor Cell Differentiation after Traumatic Spinal Cord Injury. Int J Biol Sci 2022; 18:5391-5404. [PMID: 36147469 PMCID: PMC9461656 DOI: 10.7150/ijbs.73673] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/13/2022] [Indexed: 11/22/2022] Open
Abstract
Demyelination due to oligodendrocytes loss occurs after traumatic spinal cord injury (TSCI). Several studies have suggested the therapeutic potential of vitamin D (VitD) in demyelinating diseases. However, experimental evidence in the context of TSCI is limited, particularly in the presence of prior VitD-deficiency. In the present study, a contusion and a transection TSCI rat model were used, representing mild and severe injury, respectively. Motor recovery was assessed in rats with normal VitD level or with VitD-deficiency after 8 weeks' treatment post-TSCI (Cholecalciferol, 500 IU/kg/day). The impact on myelin integrity was examined by transmission electron microscopy and studied in vitro using primary culture of oligodendrocytes. We found that VitD treatment post-TSCI effectively improved hindlimb movement in rats with normal VitD level irrespective of injury severity. However, cord-transected rats with prior deficiency did not seem to benefit from VitD supplementation. Our data further suggested that having sufficient VitD was essential for persevering myelin integrity after injury. VitD rescued oligodendrocytes from apoptotic cell death in vitro and enhanced their myelinating ability towards dorsal root axons. Enhanced myelination was mediated by increased oligodendrocyte precursor cells (OPCs) differentiation into oligodendrocytes in concert with c-Myc downregulation and suppressed OPCs proliferation. Our study provides novel insights into the functioning of VitD as a regulator of OPCs differentiation as well as strong preclinical evidence supporting future clinical testing of VitD for TSCI.
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Affiliation(s)
- Ning Li
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong.,Department of Neurosurgery, Zhongda Hospital, Southeast University, Nanjing, China
| | - Min Yao
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong.,School of Pharmaceutical Sciences, Health Science Centre, Shenzhen University, Shenzhen, China
| | - Jiaxin Liu
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong
| | - Zhiyuan Zhu
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong.,Department of Functional Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Tsz-Lung Lam
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong
| | - Pingde Zhang
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong
| | - Karrie Mei-Yee Kiang
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong
| | - Gilberto Ka-Kit Leung
- Department of Surgery, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong
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Voiriot G, Oualha M, Pierre A, Salmon-Gandonnière C, Gaudet A, Jouan Y, Kallel H, Radermacher P, Vodovar D, Sarton B, Stiel L, Bréchot N, Préau S, Joffre J. Chronic critical illness and post-intensive care syndrome: from pathophysiology to clinical challenges. Ann Intensive Care 2022; 12:58. [PMID: 35779142 PMCID: PMC9250584 DOI: 10.1186/s13613-022-01038-0] [Citation(s) in RCA: 60] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/20/2022] [Indexed: 12/24/2022] Open
Abstract
Background Post‐intensive care syndrome (PICS) encompasses physical, cognition, and mental impairments persisting after intensive care unit (ICU) discharge. Ultimately it significantly impacts the long‐term prognosis, both in functional outcomes and survival. Thus, survivors often develop permanent disabilities, consume a lot of healthcare resources, and may experience prolonged suffering. This review aims to present the multiple facets of the PICS, decipher its underlying mechanisms, and highlight future research directions. Main text This review abridges the translational data underlying the multiple facets of chronic critical illness (CCI) and PICS. We focus first on ICU-acquired weakness, a syndrome characterized by impaired contractility, muscle wasting, and persisting muscle atrophy during the recovery phase, which involves anabolic resistance, impaired capacity of regeneration, mitochondrial dysfunction, and abnormalities in calcium homeostasis. Second, we discuss the clinical relevance of post-ICU cognitive impairment and neuropsychological disability, its association with delirium during the ICU stay, and the putative role of low-grade long-lasting inflammation. Third, we describe the profound and persistent qualitative and quantitative alteration of the innate and adaptive response. Fourth, we discuss the biological mechanisms of the progression from acute to chronic kidney injury, opening the field for renoprotective strategies. Fifth, we report long-lasting pulmonary consequences of ARDS and prolonged mechanical ventilation. Finally, we discuss several specificities in children, including the influence of the child’s pre-ICU condition, development, and maturation. Conclusions Recent understandings of the biological substratum of the PICS’ distinct features highlight the need to rethink our patient trajectories in the long term. A better knowledge of this syndrome and precipitating factors is necessary to develop protocols and strategies to alleviate the CCI and PICS and ultimately improve patient recovery.
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Affiliation(s)
- Guillaume Voiriot
- Service de Médecine Intensive Réanimation, Hôpital Tenon, Sorbonne Université, Assistance Publique - Hôpitaux de Paris, Paris, France
| | - Mehdi Oualha
- Pediatric Intensive Care Unit, Necker Hospital, APHP, Centre - Paris University, Paris, France
| | - Alexandre Pierre
- Institut Pasteur de Lille, U1167 - RID-AGE - Facteurs de Risque et Déterminants Moléculaires des Maladies Liées au Vieillissement, University Lille, Inserm, CHU Lille, 59000, Lille, France.,Department of Intensive Care Medicine, Critical Care Center, CHU Lille, 59000, Lille, France.,Faculté de Médecine de Tours, Centre d'Etudes des Pathologies Respiratoires, INSERM U1100, University Lille, Tours, France
| | - Charlotte Salmon-Gandonnière
- Service de Médecine Intensive Réanimation, CHRU de Tours, Réseau CRICS-TRIGGERSEP F-CRIN Research Network, Tours, France
| | - Alexandre Gaudet
- Department of Intensive Care Medicine, Critical Care Center, CHU Lille, 59000, Lille, France.,Faculté de Médecine de Tours, Centre d'Etudes des Pathologies Respiratoires, INSERM U1100, University Lille, Tours, France.,Institut Pasteur de Lille, U1019-UMR9017-CIIL-Centre d'Infection et d'Immunité de Lille, 59000, Lille, France
| | - Youenn Jouan
- Service de Médecine Intensive Réanimation, CHRU de Tours, Réseau CRICS-TRIGGERSEP F-CRIN Research Network, Tours, France
| | - Hatem Kallel
- Service de Réanimation, Centre Hospitalier de Cayenne, French Guiana, Cayenne, France
| | - Peter Radermacher
- Institut für Anästhesiologische Pathophysiologie und Verfahrensentwicklung, Universitätsklinikum Ulm, 89070, Ulm, Germany
| | - Dominique Vodovar
- Centre AntiPoison de Paris, Hôpital Fernand Widal, APHP, 75010, Paris, France.,Faculté de Pharmacie, UMRS 1144, 75006, Paris, France.,Université de Paris, UFR de Médecine, 75010, Paris, France
| | - Benjamine Sarton
- Critical Care Unit, University Hospital of Purpan, Toulouse, France.,Toulouse NeuroImaging Center, ToNIC, Inserm 1214, Paul Sabatier University, Toulouse, France
| | - Laure Stiel
- Service de Réanimation Médicale, Groupe Hospitalier de la Région Mulhouse Sud Alsace, Mulhouse, France.,INSERM, LNC UMR 1231, FCS Bourgogne Franche Comté LipSTIC LabEx, Dijon, France
| | - Nicolas Bréchot
- Service de Médecine Intensive Réanimation, Sorbonne Université, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.,College de France, Center for Interdisciplinary Research in Biology (CIRB)-UMRS INSERM U1050 - CNRS 7241, Paris, France
| | - Sébastien Préau
- Institut Pasteur de Lille, U1167 - RID-AGE - Facteurs de Risque et Déterminants Moléculaires des Maladies Liées au Vieillissement, University Lille, Inserm, CHU Lille, 59000, Lille, France.,Service de Médecine Intensive Réanimation, CHRU de Tours, Réseau CRICS-TRIGGERSEP F-CRIN Research Network, Tours, France
| | - Jérémie Joffre
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, 94143, USA. .,Medical Intensive Care Unit, Saint Antoine University Hospital, APHP, Sorbonne University, 75012, Paris, France. .,Sorbonne University, Centre de Recherche Saint-Antoine INSERM U938, 75012, Paris, France.
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Meyer HJ, Wienke A, Surov A. Computed tomography-defined low skeletal muscle mass as a prognostic marker for short-term mortality in critically ill patients: A systematic review and meta-analysis. Nutrition 2021; 91-92:111417. [PMID: 34399402 DOI: 10.1016/j.nut.2021.111417] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 06/28/2021] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Low skeletal muscle mass (LSMM) can be assessed by imaging modalities and is associated with several clinically relevant factors in critically ill patients. Our aim was to establish the effect of computed tomography (CT)-defined LSMM on short-term mortality in critically ill patients based on a large patient sample. METHODS The MedLine library and the Cochrane and SCOPUS databases were screened for associations between CT-defined LSMM and short-term mortality in critically ill patients up to May 2021. The primary endpoint of the systematic review was the odds ratio of sarcopenia on mortality. In total, nine studies were selected as suitable for the analysis and included into the present analysis. RESULTS The studies included a total of 1563 critically ill patients with different underlying diagnoses. The pooled overall prevalence of LSMM was 50.9%. The pooled odds ratio for the effect of sarcopenia on short-term mortality was 2.78 (95% confidence interval, 2.05-3.75). CONCLUSIONS CT-defined LSMM is highly prevalent in critically ill patients, has a relevant effect on short-term mortality, and should be included as a relevant prognostic biomarker in clinical routines.
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Affiliation(s)
- Hans-Jonas Meyer
- Department of Diagnostic and Interventional Radiology, University of Leipzig, Leipzig, Germany.
| | - Andreas Wienke
- Institute of Medical Epidemiology, Biostatistics, and Informatics, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Alexey Surov
- Department of Radiology and Nuclear Medicine, University of Magdeburg, Magdeburg, Germany
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8
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Goossens C, Weckx R, Derde S, Van Helleputte L, Schneidereit D, Haug M, Reischl B, Friedrich O, Van Den Bosch L, Van den Berghe G, Langouche L. Impact of prolonged sepsis on neural and muscular components of muscle contractions in a mouse model. J Cachexia Sarcopenia Muscle 2021; 12:443-455. [PMID: 33465304 PMCID: PMC8061378 DOI: 10.1002/jcsm.12668] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/19/2020] [Accepted: 12/16/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Prolonged critically ill patients frequently develop debilitating muscle weakness that can affect both peripheral nerves and skeletal muscle. In-depth knowledge on the temporal contribution of neural and muscular components to muscle weakness is currently incomplete. METHODS We used a fluid-resuscitated, antibiotic-treated, parenterally fed murine model of prolonged (5 days) sepsis-induced muscle weakness (caecal ligation and puncture; n = 148). Electromyography (EMG) measurements were performed in two nerve-muscle complexes, combined with histological analysis of neuromuscular junction denervation, axonal degeneration, and demyelination. In situ muscle force measurements distinguished neural from muscular contribution to reduced muscle force generation. In myofibres, imaging and biomechanics were combined to evaluate myofibrillar contractile calcium sensitivity, sarcomere organization, and fibre structural properties. Myosin and actin protein content and titin gene expression were measured on the whole muscle. RESULTS Five days of sepsis resulted in increased EMG latency (P = 0.006) and decreased EMG amplitude (P < 0.0001) in the dorsal caudal tail nerve-tail complex, whereas only EMG amplitude was affected in the sciatic nerve-gastrocnemius muscle complex (P < 0.0001). Myelin sheath abnormalities (P = 0.2), axonal degeneration (number of axons; P = 0.4), and neuromuscular junction denervation (P = 0.09) were largely absent in response to sepsis, but signs of axonal swelling [higher axon area (P < 0.0001) and g-ratio (P = 0.03)] were observed. A reduction in maximal muscle force was present after indirect nerve stimulation (P = 0.007) and after direct muscle stimulation (P = 0.03). The degree of force reduction was similar with both stimulations (P = 0.2), identifying skeletal muscle, but not peripheral nerves, as the main contributor to muscle weakness. Myofibrillar calcium sensitivity of the contractile apparatus was unaffected by sepsis (P ≥ 0.6), whereas septic myofibres displayed disorganized sarcomeres (P < 0.0001) and altered myofibre axial elasticity (P < 0.0001). Septic myofibres suffered from increased rupturing in a passive stretching protocol (25% more than control myofibres; P = 0.04), which was associated with impaired myofibre active force generation (P = 0.04), linking altered myofibre integrity to function. Sepsis also caused a reduction in muscle titin gene expression (P = 0.04) and myosin and actin protein content (P = 0.05), but not the myosin-to-actin ratio (P = 0.7). CONCLUSIONS Prolonged sepsis-induced muscle weakness may predominantly be related to a disruption in myofibrillar cytoarchitectural structure, rather than to neural abnormalities.
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Affiliation(s)
- Chloë Goossens
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Ruben Weckx
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Sarah Derde
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Lawrence Van Helleputte
- Experimental Neurology and Leuven Brain Institute, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Laboratory of Neurobiology, VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Dominik Schneidereit
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Michael Haug
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Barbara Reischl
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Oliver Friedrich
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Ludo Van Den Bosch
- Experimental Neurology and Leuven Brain Institute, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Laboratory of Neurobiology, VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Greet Van den Berghe
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Lies Langouche
- Clinical Division and Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
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