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Journal of Shoulder and Elbow Surgery Jun 2024The degree of atrophy and fatty infiltration of rotator cuff muscle belly is a key predictor for cuff repairability. Traditionally, Goutallier grading of fatty...
Medial Scapular Body (MSB) Goutallier Classification - MRI based reliability and validity of evaluation of the Goutallier classification for grading fatty infiltration of the rotator cuff.
INTRODUCTION
The degree of atrophy and fatty infiltration of rotator cuff muscle belly is a key predictor for cuff repairability. Traditionally, Goutallier grading of fatty infiltration is assessed at sagittal scapular Y-view. Massive rotator cuff tears are associated with tendon retraction and medial retraction of cuff musculature, resulting in medialization of the muscle bulk. Thus, standard Y-view can misrepresent the region of interest and may misguide clinicians when assessing repairability. It is hypothesized that by assessing the muscle belly with multiple medial sagittal MRI sections at medial scapular body, the Medial Scapular Body - Goutallier Classification (MSB-GC) will improve reliability and repeatability giving a more representative approximation to the degree of fatty infiltration, as compared with original Y-view.
METHODS
Fatty infiltration of the rotator cuff muscles were classified based on the Goutallier grade (0 to 4) at three defined sections section 1: original Y-view; section 2: level of suprascapular notch; section 3: three cm medial to suprascapular notch on MRI scans. Six sub-specialist fellowship trained shoulder surgeons, and three musculoskeletal radiologists independently evaluated deidentified MRI scans of included patients.
RESULTS
Out of 80 scans, 78% (n=62) were massive cuff tears involving supraspinatus, infraspinatus and subscapularis tendon. Inter-observer reliability (consistency between observers) for Goutallier grade was excellent for all three predefined sections (range:0.87-0.95). Intra-observer reliability (repeatability) for Goutallier grade was excellent for all three sections and four rotator cuff muscles (range:0.83-0.97). There was a moderate to strong positive correlation of Goutallier grades between sections 1 and 3 and between sections 2 and 3 and these were statistically significant (p<0.001). There was a reduction in the severity of fatty infiltration on the Goutallier classification from sections 1 to 3 across all muscles. 42.5% of both supraspinatus and infraspinatus were downgraded by one, 20% of supraspinatus and 3.8% of infraspinatus were downgraded by 2 and 2.5% of supraspinatus were downgraded by 3.
CONCLUSION
This study found that applying the Goutallier classification to more medial MRI sections (MSB-GC) resulted in assignment of lower grades for all rotator cuff muscles. Additionally, this method demonstrated excellent test-retest reliability and repeatability. Inclusion of a more medial view or whole scapula on MRI, especially in advanced levels of tear retraction, could be more reliable and representative for assessment of the degree of fatty infiltration within the muscle bulk that could help predict tear repairability and therefore improve clinical decision-making which should be studied further in clinical studies.
PubMed: 38944373
DOI: 10.1016/j.jse.2024.05.013 -
Archives of Gerontology and Geriatrics Jun 2024There is growing interest in the association of CT-assessed sarcopenia with adverse outcomes in non-oncological settings.
BACKGROUND
There is growing interest in the association of CT-assessed sarcopenia with adverse outcomes in non-oncological settings.
PURPOSE
The aim of this systematic review is to summarize existing literature on the prognostic implications of CT-assessed sarcopenia in non-oncological patients.
MATERIALS AND METHODS
Three independent authors searched Medline/PubMed, Embase and Cochrane Library up to 30 December 2023 for observational studies that reported the presence of sarcopenia defined on CT head and neck in association with mortality estimates and other adverse outcomes, in non-oncological patients. The quality of included studies were assessed using the Quality of Prognostic Studies tool.
RESULTS
Overall, 15 studies (3829 participants) were included. Nine studies were at low risk of bias, and six were at moderate risk of bias. Patient populations included those admitted for trauma or treatment of intracranial aneurysms, ischemic stroke, transient ischemic attack, and intracranial stenosis. Sarcopenia was associated with increased 30-day to 2-year mortality in inpatients and patients undergoing carotid endarterectomy or mechanical thrombectomy for acute ischemic stroke. Sarcopenia was also associated with poorer neurological and functional outcomes, increased likelihood of admission to long-term care facilities, and longer duration of hospital stays. The observed associations of sarcopenia with adverse outcomes remained similar across different imaging modalities and methods for quantifying sarcopenia.
CONCLUSION
CT-assessed sarcopenia was associated with increased mortality and poorer outcomes across diverse patient populations. Measurement and early identification of sarcopenia in vulnerable patients allows for enhanced prognostication, and focused allocation of resources to mitigate adverse outcomes.
PubMed: 38944005
DOI: 10.1016/j.archger.2024.105549 -
Journal of Neuromuscular Diseases Jun 2024Respiratory and bulbar dysfunctions (including swallowing, feeding, and speech functions) are key symptoms of spinal muscular atrophy (SMA), especially in its most...
BACKGROUND
Respiratory and bulbar dysfunctions (including swallowing, feeding, and speech functions) are key symptoms of spinal muscular atrophy (SMA), especially in its most severe forms. Demonstrating the long-term efficacy of disease-modifying therapies (DMTs) necessitates an understanding of SMA natural history.
OBJECTIVE
This study summarizes published natural history data on respiratory, swallowing, feeding, and speech functions in patients with SMA not receiving DMTs.
METHODS
Electronic databases (Embase, MEDLINE, and Evidence-Based Medicine Reviews) were searched from database inception to June 27, 2022, for studies reporting data on respiratory and/or bulbar function outcomes in Types 1-3 SMA. Data were extracted into a predefined template and a descriptive summary of these data was provided.
RESULTS
Ninety-one publications were included: 43 reported data on respiratory, swallowing, feeding, and/or speech function outcomes. Data highlighted early loss of respiratory function for patients with Type 1 SMA, with ventilatory support typically required by 12 months of age. Patients with Type 2 or 3 SMA were at risk of losing respiratory function over time, with ventilatory support initiated between the first and fifth decades of life. Swallowing and feeding difficulties, including choking, chewing problems, and aspiration, were reported in patients across the SMA spectrum. Swallowing and feeding difficulties, and a need for non-oral nutritional support, were reported before 1 year of age in Type 1 SMA, and before 10 years of age in Type 2 SMA. Limited data relating to other bulbar functions were collated.
CONCLUSIONS
Natural history data demonstrate that untreated patients with SMA experience respiratory and bulbar function deterioration, with a more rapid decline associated with greater disease severity. This study provides a comprehensive repository of natural history data on bulbar function in SMA, and it highlights that consistent assessment of outcomes in this area is necessary to benefit understanding and approval of new treatments.
PubMed: 38943396
DOI: 10.3233/JND-230248 -
Movement Disorders Clinical Practice Jun 2024Primary mitochondrial diseases (PMDs) are the most common inborn errors of energy metabolism, with a combined prevalence of 1 in 4300. They can result from mutations in... (Review)
Review
BACKGROUND
Primary mitochondrial diseases (PMDs) are the most common inborn errors of energy metabolism, with a combined prevalence of 1 in 4300. They can result from mutations in either nuclear DNA (nDNA) or mitochondrial DNA (mtDNA). These disorders are multisystemic and mainly affect high energy-demanding tissues, such as muscle and the central nervous system (CNS). Among many clinical features of CNS involvement, parkinsonism is one of the most common movement disorders in PMDs.
METHODS
This review provides a pragmatic educational overview of the most recent advances in the field of mitochondrial parkinsonism, from pathophysiology and genetic etiologies to phenotype and diagnosis.
RESULTS
mtDNA maintenance and mitochondrial dynamics alterations represent the principal mechanisms underlying mitochondrial parkinsonism. It can be present in isolation, alongside other movement disorders or, more commonly, as part of a multisystemic phenotype. Mutations in several nuclear-encoded genes (ie, POLG, TWNK, SPG7, and OPA1) and, more rarely, mtDNA mutations, are responsible for mitochondrial parkinsonism. Progressive external opthalmoplegia and optic atrophy may guide genetic etiology identification.
CONCLUSION
A comprehensive deep-phenotyping approach is needed to reach a diagnosis of mitochondrial parkinsonism, which lacks distinctive clinical features and exemplifies the intricate genotype-phenotype interplay of PMDs.
PubMed: 38943319
DOI: 10.1002/mdc3.14148 -
Nutrition & Metabolism Jun 2024Conflicting findings regarding the impact of High protein intake during the early phase in critically ill patients have been reported. Therefore, we aimed to assess the...
BACKGROUND
Conflicting findings regarding the impact of High protein intake during the early phase in critically ill patients have been reported. Therefore, we aimed to assess the influence of higher early protein intake on the prognosis of critically ill patients.
METHODS
This randomized controlled trial involved 173 critically ill patients who stayed in the Intensive Care Unit/Emergency ICU (ICU/EICU) for at least 7 days. The Low group (n = 87) and High group (n = 86) received protein supplementation of 0.8 g/kg.d and 1.5 g/kg.d, respectively, within 1-3 days of enteral nutrition (EN) initiation, with both groups transitioning to 1.5 g/kg.d on the 4th day. The serum prealbumin (PA), blood urea nitrogen/creatinine, and rectus femoris muscle thickness and cross-sectional area of all patients was measured on the 1th, 3rd, 5th, 7th day, and the day of ICU/EICU discharge.
RESULTS
Patients in both Low and High groups showed no significant differences in age, APACHE II scores, or other demographic and baseline characteristics. There were also no significant differences in the primary outcome (28-day mortality rate) and secondary outcomes (incidence rate of refeeding syndrome and EN tolerance score) between the two groups. However, the Low group exhibited a significantly higher 28-day mortality rate (HR = 2.462, 95% CI: 1.021-5.936, P = 0.045) compared to High group, as determined by Cox proportional hazards models incorporating the time factor. The High group exhibited significantly shorter durations of mechanical ventilation and ICU stay compared to the Low group. Serum PA levels were higher, and rectus femoris muscle atrophy rates were lower in the High group. Furthermore, for septic patients, high protein intake significantly reduced the 28-day mortality rate despite a small sample size (n = 34).
CONCLUSIONS
Our study indicates that increasing early protein intake to 1.5 g/kg.d may be safe and help improve the nutritional status and prognosis of critically ill patients.
TRIAL REGISTRATION
This study was registered with the Chinese Clinical Trial Registry (ChiCTR2000039997, https://www.chictr.org.cn/ ).
PubMed: 38943189
DOI: 10.1186/s12986-024-00818-8 -
Die Anaesthesiologie Jun 2024
PubMed: 38942900
DOI: 10.1007/s00101-024-01430-4 -
Cell Death & Disease Jun 2024Aging and obesity pose significant threats to public health and are major contributors to muscle atrophy. The trends in muscle fiber types under these conditions and the...
Aging and obesity pose significant threats to public health and are major contributors to muscle atrophy. The trends in muscle fiber types under these conditions and the transcriptional differences between different muscle fiber types remain unclear. Here, we demonstrate distinct responses of fast/glycolytic fibers and slow/oxidative fibers to aging and obesity. We found that in muscles dominated by oxidative fibers, the proportion of oxidative fibers remains unchanged during aging and obesity. However, in muscles dominated by glycolytic fibers, despite the low content of oxidative fibers, a significant decrease in proportion of oxidative fibers was observed. Consistently, our study uncovered that during aging and obesity, fast/glycolytic fibers specifically increased the expression of genes associated with muscle atrophy and inflammation, including Dkk3, Ccl8, Cxcl10, Cxcl13, Fbxo32, Depp1, and Chac1, while slow/oxidative fibers exhibit elevated expression of antioxidant protein Nqo-1 and downregulation of Tfrc. Additionally, we noted substantial differences in the expression of calcium-related signaling pathways between fast/glycolytic fibers and slow/oxidative fibers in response to aging and obesity. Treatment with a calcium channel inhibitor thapsigargin significantly increased the abundance of oxidative fibers. Our study provides additional evidence to support the transcriptomic differences in muscle fiber types under pathophysiological conditions, thereby establishing a theoretical basis for modulating muscle fiber types in disease treatment.
Topics: Aging; Obesity; Animals; Gene Expression Profiling; Glycolysis; Male; Mice; Mice, Inbred C57BL; Muscle Fibers, Skeletal; Transcriptome; Muscle Fibers, Slow-Twitch; Humans
PubMed: 38942747
DOI: 10.1038/s41419-024-06851-y -
Medicine Jun 2024This article aims to analyze the prevalence of sarcopenia among the elderly in Guizhou Province, China, and its association with human immunodeficiency virus (HIV)... (Observational Study)
Observational Study
This article aims to analyze the prevalence of sarcopenia among the elderly in Guizhou Province, China, and its association with human immunodeficiency virus (HIV) infection. This cross-sectional study included 377 patients aged 60 and above in Guiyang Public Health Treatment Center from December 2022 to October 2023, including 231 patients in the community clinic and 146 HIV-infected individuals. According to the Asian Working Group for Sarcopenia 2019 Consensus to diagnose sarcopenia. Logistic regression was used to explore association between sarcopenia and HIV, and stratified by sex and age group. The prevalence of sarcopenia in the non-HIV infection elderly in Guizhou Province was 7.8% (21.3% in males and 5.5% in females), and the prevalence of sarcopenia in HIV-infected individuals was 29.5% (33.3% in males and 13.2% in females), with a statistically significant difference between HIV groups (χ2 = 30.946, P < .001). After control of gender, age, body mass index, body fat percentage, hypertension, diabetes, taking statins, smoking status, medium to high-intensity physical activity, whether childhood poverty, and parents died young, HIV infection was significantly associated with sarcopenia in the elderly (odds ratio = 4.635, 95% confidence interval = 1.920-11.188, P = .001). The results of stratified regression were similar to the main results. The prevalence of sarcopenia in the elderly population in China was severe. HIV infection was a risk factor for sarcopenia. It is urgent to establish a prevention and treatment system for sarcopenia in the elderly population, especially for elderly HIV-infected male.
Topics: Humans; Male; Female; Sarcopenia; China; HIV Infections; Prevalence; Cross-Sectional Studies; Aged; Middle Aged; Risk Factors; Aged, 80 and over
PubMed: 38941377
DOI: 10.1097/MD.0000000000038532 -
PloS One 2024Many newborn screening programs worldwide have introduced screening for diseases using DNA extracted from dried blood spots (DBS). In Germany, DNA-based assays are...
BACKGROUND
Many newborn screening programs worldwide have introduced screening for diseases using DNA extracted from dried blood spots (DBS). In Germany, DNA-based assays are currently used to screen for severe combined immunodeficiency (SCID), spinal muscular atrophy (SMA), and sickle cell disease (SCD).
METHODS
This study analysed the impact of pre-analytic DNA carry-over in sample preparation on the outcome of DNA-based newborn screening for SCID and SMA and compared the efficacy of rapid extraction versus automated protocols. Additionally, the distribution of T cell receptor excision circles (TREC) on DBS cards, commonly used for routine newborn screening, was determined.
RESULTS
Contaminations from the punching procedure were detected in the SCID and SMA assays in all experimental setups tested. However, a careful evaluation of a cut-off allowed for a clear separation of true positive polymerase chain reaction (PCR) amplifications. Our rapid in-house extraction protocol produced similar amounts compared to automated commercial systems. Therefore, it can be used for reliable DNA-based screening. Additionally, the amount of extracted DNA significantly differs depending on the location of punching within a DBS.
CONCLUSIONS
Newborn screening for SMA and SCID can be performed reliably. It is crucial to ensure that affected newborns are not overlooked. Therefore a carefully consideration of potential contaminating factors and the definition of appropriate cut-offs to minimise the risk of false results are of special concern. It is also important to note that the location of punching plays a pivotal role, and therefore an exact quantification of TREC numbers per μl may not be reliable and should therefore be avoided.
Topics: Humans; Neonatal Screening; Infant, Newborn; Muscular Atrophy, Spinal; Severe Combined Immunodeficiency; DNA; Dried Blood Spot Testing; High-Throughput Screening Assays; Polymerase Chain Reaction
PubMed: 38941330
DOI: 10.1371/journal.pone.0306329 -
Clinical Microbiology Reviews Jun 2024SUMMARYThe gut microbiota is a major factor contributing to the regulation of energy homeostasis and has been linked to both excessive body weight and accumulation of... (Review)
Review
SUMMARYThe gut microbiota is a major factor contributing to the regulation of energy homeostasis and has been linked to both excessive body weight and accumulation of fat mass (i.e., overweight, obesity) or body weight loss, weakness, muscle atrophy, and fat depletion (i.e., cachexia). These syndromes are characterized by multiple metabolic dysfunctions including abnormal regulation of food reward and intake, energy storage, and low-grade inflammation. Given the increasing worldwide prevalence of obesity, cachexia, and associated metabolic disorders, novel therapeutic strategies are needed. Among the different mechanisms explaining how the gut microbiota is capable of influencing host metabolism and energy balance, numerous studies have investigated the complex interactions existing between nutrition, gut microbes, and their metabolites. In this review, we discuss how gut microbes and different microbiota-derived metabolites regulate host metabolism. We describe the role of the gut barrier function in the onset of inflammation in this context. We explore the importance of the gut-to-brain axis in the regulation of energy homeostasis and glucose metabolism but also the key role played by the liver. Finally, we present specific key examples of how using targeted approaches such as prebiotics and probiotics might affect specific metabolites, their signaling pathways, and their interactions with the host and reflect on the challenges to move from bench to bedside.
PubMed: 38940505
DOI: 10.1128/cmr.00045-23