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Podgórski R, Sumińska M, Rachel M, Pikuła B, Fichna P, Bidlingmaier M, Fichna M. Changes of androgen and corticosterone metabolites excretion and conversion in cystic fibrosis. Front Endocrinol (Lausanne) 2023; 14:1244127. [PMID: 37711888 PMCID: PMC10497873 DOI: 10.3389/fendo.2023.1244127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 08/14/2023] [Indexed: 09/16/2023] Open
Abstract
Cystic fibrosis (CF) is a life-threatening inherited disease related to a mutation in the CFTR gene, that leads to serious health complications such as chronic pulmonary infections, pancreatic insufficiency, dysfunction of the sweat glands and reproductive system. For the first time, we have described the profile of corticosterone and androgen metabolites in urine, as well as the activity of enzymes involved in steroid genesis and metabolism in people with CF, using gas chromatography/mass spectrometry. A significant reduction in the excretion of most of the measured metabolites in CF was found. These differences were observed in the group of progestagen metabolites, as well as among metabolites of corticosterone and androgens. We revealed higher activities of 17β-hydroxysteroid dehydrogenase and 17,20-lyase in the Δ4 pathway compared with controls, what can promote the androgen synthesis through the backdoor androgen pathway. We have also found the increased conversion activity of 11-oxyganated steroids by 5a-reductase in backdoor pathway. Levels of the most potent and vital androgens (testosterone and dihydrotestosterone) are comparable in both groups. However, the excretion of dehydroepiandrosterone was lower in CF. Decreased cholesterol lipoprotein levels may contribute to limited intracellular cholesterol supply and reduced adrenal steroidogenesis in CF individuals. Changes in the activity of some steroidogenesis enzymes may suggest the presence of some peripheral adaptive mechanisms in CF to maintain androgen balance in the body despite the limited sufficiency of secretion by the adrenal cortex.
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Affiliation(s)
- Rafał Podgórski
- Department of Biochemistry, Institute of Medical Sciences, Medical College of Rzeszow University, Rzeszow, Poland
| | - Marta Sumińska
- Department of Pediatric Diabetes, Auxology and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Marta Rachel
- Department of Pediatric, Institute of Medical Sciences, Medical College of Rzeszow University, Rzeszow, Poland
| | - Barbara Pikuła
- Department of Biology, Institute of Medical Sciences, Medical College of Rzeszow University, Rzeszow, Poland
| | - Piotr Fichna
- Department of Pediatric Diabetes, Auxology and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Martin Bidlingmaier
- Endocrine Laboratory, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - Marta Fichna
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
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Wu K, Michalski A, Sykes J, Batt J, Stephenson AL, Mathur S. Comparison of quadriceps muscle size and quality in adults with cystic fibrosis with different severities of cystic fibrosis transmembrane conductance regulator protein dysfunction. Chron Respir Dis 2022; 19:14799731221131330. [PMID: 36380568 PMCID: PMC9669672 DOI: 10.1177/14799731221131330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Cystic fibrosis (CF) is characterized by CF transmembrane conductance
regulator (CFTR) dysfunction. CFTR protein is expressed in human skeletal
muscle; however, its impact on skeletal muscle is unknown. The objectives of
this study were to compare quadriceps muscle size and quality between adults
with various severities of CFTR protein dysfunction. Methods We conducted a prospective, cross-sectional study comparing 34 adults with
severe versus 18 with mild CFTR protein dysfunction, recruited from a
specialized CF centre. Ultrasound images of rectus femoris cross-sectional
area (RF-CSA) and quadriceps layer thickness for muscle size, and rectus
femoris echogenicity (RF-ECHO) (muscle quality) were obtained. Multivariable
linear regression models were developed using purposeful selection
technique. Results People with severe CFTR protein dysfunction had larger RF-CSA by
3.22 cm2, 95% CI (1.03, 5.41) cm2,
p=.0049], after adjusting for oral corticosteroid use
and Pseudomonas aeruginosa colonization. However, a
sensitivity analysis indicated that the result was influenced by the
specific confounders being adjusted for in the model. We did not find any
significant differences in quadriceps layer thickness or RF-ECHO between the
two groups. Conclusion We found no differential impact of the extent of diminished CFTR protein
activity on quadriceps muscle size or quality in our study cohort. Based on
these findings, CFTR mutation status cannot be used differentiate leg muscle
size or quality in people with CF.
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Affiliation(s)
- Kenneth Wu
- Rehabilitation Sciences Institute, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Toronto Adult Cystic Fibrosis Centre, Department of Respirology, St. Michael’s Hospital, Unity Health Toronto, Toronto, ON, Canada
- Department of Physical Therapy, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Anna Michalski
- Department of Physical Therapy, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Jenna Sykes
- Toronto Adult Cystic Fibrosis Centre, Department of Respirology, St. Michael’s Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Jane Batt
- Department of Respirology, St. Michael’s Hospital, Unity Health Toronto, Toronto, ON Canada
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, ON Canada
| | - Anne L Stephenson
- Toronto Adult Cystic Fibrosis Centre, Department of Respirology, St. Michael’s Hospital, Unity Health Toronto, Toronto, ON, Canada
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, ON Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Sunita Mathur
- Rehabilitation Sciences Institute, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Department of Physical Therapy, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- School of Rehabilitation Therapy, Queen’s University, Kingston, ON, Canada
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Vendrusculo FM, Bueno GS, Gheller MF, Campos NE, Schiwe D, de Almeida IS, Becker NA, Heinzmann-Filho JP, Donadio MVF. Peripheral muscle strength is associated with aerobic fitness and use of antibiotics in patients with cystic fibrosis. Int J Clin Pract 2021; 75:e14050. [PMID: 33497024 DOI: 10.1111/ijcp.14050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 01/19/2021] [Indexed: 12/13/2022] Open
Abstract
AIMS Individuals with cystic fibrosis (CF) may develop muscle abnormalities, although little is known on its clinical and functional impact. This study aimed to evaluate the association of peripheral muscle strength with aerobic fitness, habitual physical activity, lung function and the use of antibiotics (ATB) in patients with CF. METHODS A cross-sectional study where individuals aged ≥6 years underwent peripheral muscle strength evaluation (biceps, quadriceps and hamstrings) and performed a cardiopulmonary exercise test. Demographic, anthropometric, genetic, lung function and total days of ATB use within 1 year of tests were also collected. RESULTS Correlation was found for biceps (r = .45; P = .002) strength with the peak oxygen consumption (VO2 peak). Muscle strength (biceps and quadriceps) also correlated with the ventilatory equivalent for oxygen consumption (VE /VO2 ) at anaerobic threshold (AT) and with the ventilatory equivalent for carbon dioxide production (VE /VCO2 ) both at AT and peak exercise. Negative correlations were found for quadriceps (r = -.39) and hamstrings (r = -.42) with the total days of ATB use in the following year. Patients needing to use ATB presented lower biceps strength (P = .05) and individuals with VO2 peak lower than 37 mL·kg-1 ·min-1 presented lower muscle strength for both biceps (P = .01) and quadriceps (P = .02). CONCLUSIONS The results have shown that peripheral muscle strength is associated with aerobic fitness and the use of antibiotics in patients with CF.
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Affiliation(s)
- Fernanda Maria Vendrusculo
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Gabriela Sabino Bueno
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Mailise Fátima Gheller
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Natália Evangelista Campos
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Daniele Schiwe
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Ingrid Silveira de Almeida
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Nicolas Acosta Becker
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - João Paulo Heinzmann-Filho
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Márcio Vinícius Fagundes Donadio
- Laboratory of Pediatric Physical Activity, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
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Wu K, Mendes PL, Sykes J, Stephenson AL, Mathur S. Limb muscle size and contractile function in adults with cystic fibrosis: A systematic review and meta-analysis. J Cyst Fibros 2021; 20:e53-e62. [PMID: 33648899 DOI: 10.1016/j.jcf.2021.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 02/17/2021] [Accepted: 02/17/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND There is conflicting evidence regarding the presence of limb muscle impairments in adults with cystic fibrosis (CF), and the factors associated with these muscle impairments. The objectives of this study were to compare limb muscle size and function between adults with CF and healthy controls; and to examine their associations with demographic and clinical variables in adults with CF. METHODS The systematic review was performed using PRISMA guidelines. Studies were included if they measured any aspect of limb muscle size or function in adults with CF. Meta-analyses were performed to compare muscle variables between CF and healthy controls; and to examine their associations with demographic and clinical variables. RESULTS Twenty-eight studies were included, with 747 adults with CF. The meta-analyses showed that adults with CF have smaller thigh muscles [standardized mean difference (SMD) = 0.57, p<.0011, I2=0%], and lower handgrip strength (SMD = 0.89, p=.0034, I2=74.03%), which was weakly correlated with forced expiratory volume in one second (FEV1) (r=0.24, p=.035, I2=0%) and lower in females with CF (SMD = 2.05, p<.0001, I2=0%). There is no significant difference between adults with CF and controls in knee extensor strength (SMD = 0.25, p=.095, I2=42.79%). CONCLUSIONS Leg muscle atrophy and lower handgrip strength were noted. There may be a subgroup of adults with CF with knee extensor (quadriceps) weakness. Future studies are needed to better understand muscle impairments in people with CF; to explore the factors that can predict these muscle impairments; and to investigate their clinical significance in people with CF.
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Affiliation(s)
- Kenneth Wu
- Rehabilitation Sciences Institute, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Toronto Adult Cystic Fibrosis Centre, Department of Respirology, St. Michael's Hospital, Unity Health Toronto, Toronto, ON Canada; Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
| | - Polyana L Mendes
- Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Department of Gastro/General Surgery, St. Michael's Hospital, Unity Health Toronto, Toronto, ON Canada
| | - Jenna Sykes
- Toronto Adult Cystic Fibrosis Centre, Department of Respirology, St. Michael's Hospital, Unity Health Toronto, Toronto, ON Canada
| | - Anne L Stephenson
- Toronto Adult Cystic Fibrosis Centre, Department of Respirology, St. Michael's Hospital, Unity Health Toronto, Toronto, ON Canada; Institute of Health Policy, Management and Evaluation, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON Canada
| | - Sunita Mathur
- Rehabilitation Sciences Institute, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Department of Physical Therapy, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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Torvanger O, Os A, Skjonsberg OH, Edvardsen E. Cardiorespiratory fitness on a treadmill in an adult cystic fibrosis population. BMJ Open Sport Exerc Med 2020; 6:e000765. [PMID: 32843991 PMCID: PMC7437703 DOI: 10.1136/bmjsem-2020-000765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2020] [Indexed: 11/03/2022] Open
Abstract
Objectives(1) To describe the cardiorespiratory fitness (CRF) in an adult cystic fibrosis population related to sex and age, (2) to evaluate the cause of low CRF and (3) to study the association between peak oxygen uptake (VO2peak) and forced expiratory volume in 1 s (FEV1).MethodsA total of 204 cardiopulmonary treadmill exercise tests (CPETs) performed by 116 patients were included. VO2peak, gas exchange, heart rate, oxygen saturation and ventilatory variables were measured.A low CRF was defined as a VO2peak <80% of predicted, ventilatory limitation was defined as a breathing reserve <15%, exercise hypoxaemia was defined as an oxygen saturation <88% and ventilation-perfusion mismatch was defined as a minute ventilation/ventilatory equivalent for carbon dioxide slope ≥34. In patients who had performed three or more CPETs, the annual change in FEV1 and VO2peak were calculated using linear regression.ResultsThe VO2peak was 40.6±11.5 and 35.2±8.9 mL kg−1 min−1, which was 87±23 and 93±20 in percentage of predicted for men and women, respectively. VO2peak was moderately affected by age, for men (r=−0.36, p<0.001) and women (r=−0.53, p<0.001), respectively. In 45 of 101 tests where CRF was low, no cardiorespiratory limiting factors were identified. The correlation coefficient between VO2peak and FEV1 was r=0.64 (p<0.001). In participants with a low CRF, FEV1 ranged from 20% to 112% of predicted.ConclusionsThe correlation between VO2peak and FEV1 was moderate. The majority of the tests resulted in a VO2peak within normal limits. Interestingly, 44% of the tests with a low VO2peak could be explained by deconditioning. Thus, exercise therapy may be beneficial for these patients.
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Affiliation(s)
- Ole Torvanger
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Pulmonary Medicine, Oslo University Hospital, Oslo, Norway
- Norwegian Resource Centre for Cystic Fibrosis, Oslo University Hospital, Oslo, Norway
| | - Audun Os
- Department of Pulmonary Medicine, Oslo University Hospital, Oslo, Norway
- Norwegian Resource Centre for Cystic Fibrosis, Oslo University Hospital, Oslo, Norway
| | - Ole Henning Skjonsberg
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Pulmonary Medicine, Oslo University Hospital, Oslo, Norway
| | - Elisabeth Edvardsen
- Department of Pulmonary Medicine, Oslo University Hospital, Oslo, Norway
- Sports Medicine, Norwegian School of Sport and Sciences, Oslo, Norway
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Combret Y, Medrinal C, Bonnevie T, Gravier FE, Le Roux P, Lamia B, Prieur G, Reychler G. Clinimetric evaluation of muscle function tests for individuals with cystic fibrosis: A systematic review. J Cyst Fibros 2020; 19:981-995. [PMID: 32534958 DOI: 10.1016/j.jcf.2020.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 05/29/2020] [Accepted: 05/29/2020] [Indexed: 12/26/2022]
Abstract
Accurate testing of muscle function is essential in individuals with cystic fibrosis (CF). A literature search was conducted in MEDLINE, CENTRAL, CINAHL, PEDro, ScienceDirect and Web of Science according to PRISMA and COSMIN guidelines from inception to September 2019 to investigate the clinimetric properties of muscle tests in individuals with CF. The search identified 37 studies (1310 individuals) and 34 different muscle tests. Maximal inspiratory pressure, inspiratory work capacity and quadriceps strength measured by computerised dynamometry were identified as reliable tests of muscle function. The one-minute sit-to-stand test was found to have high reliability but its validity to measure quadriceps strength is unknown. The clinimetric properties of other routinely used tests have not been reported in people with CF. Very different measurement procedures were identified. Inspiratory muscle and quadriceps testing can be considered as reliable but high-quality studies evaluating tests of other muscles function (e.g. muscle endurance) are lacking.
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Affiliation(s)
- Yann Combret
- Physiotherapy Department, Le Havre Hospital, F-76600, Le Havre, France; Research and Clinical Experimentation Institute (IREC), Pulmonology, ORL and Dermatology, Louvain Catholic University, Brussels1200, Belgium.
| | - Clement Medrinal
- Physiotherapy Department, Le Havre Hospital, F-76600, Le Havre, France; Normandie University, UNIROUEN, UPRES EA3830 - GRHV, Institute for Research and Innovation in Biomedicine (IRIB), F-76000, Rouen, France
| | - Tristan Bonnevie
- Normandie University, UNIROUEN, UPRES EA3830 - GRHV, Institute for Research and Innovation in Biomedicine (IRIB), F-76000, Rouen, France; ADIR Association, Rouen University Hospital, F-76000, Rouen, France
| | - Francis-Edouard Gravier
- Normandie University, UNIROUEN, UPRES EA3830 - GRHV, Institute for Research and Innovation in Biomedicine (IRIB), F-76000, Rouen, France; ADIR Association, Rouen University Hospital, F-76000, Rouen, France
| | - Pascal Le Roux
- Paediatric Department, Le Havre Hospital, F-76600, Le Havre, France
| | - Bouchra Lamia
- Normandie University, UNIROUEN, UPRES EA3830 - GRHV, Institute for Research and Innovation in Biomedicine (IRIB), F-76000, Rouen, France; Pulmonology Department, Le Havre Hospital, F-76600, Le Havre, France; Intensive Care Unit, Respiratory Department, Rouen University Hospital, Rouen, France
| | - Guillaume Prieur
- Physiotherapy Department, Le Havre Hospital, F-76600, Le Havre, France; Research and Clinical Experimentation Institute (IREC), Pulmonology, ORL and Dermatology, Louvain Catholic University, Brussels1200, Belgium; Normandie University, UNIROUEN, UPRES EA3830 - GRHV, Institute for Research and Innovation in Biomedicine (IRIB), F-76000, Rouen, France
| | - Gregory Reychler
- Research and Clinical Experimentation Institute (IREC), Pulmonology, ORL and Dermatology, Louvain Catholic University, Brussels1200, Belgium; Department of Physical Medicine and Rehabilitation, Saint-Luc University Clinics, Brussels1200, Belgium
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Abstract
Cystic fibrosis (CF) is an autosomal recessive, inherited congenital disease caused by the mutation of the family autosomal CF gene, with cumulative exocrine secretion characterized by inflammation, tracheal remodeling, and mucus accumulation. With the development of modern medical technology, CF patients are living longer lives and receiving more and more treatments, including traditional drugs, physical therapy, and gene therapy. Exercise is widely used to prevent and treat metabolic diseases such as cardiovascular diseases, obesity, diabetes, and metabolic syndrome. Regular exercise is beneficial to aerobic capacity and lung health. Exercise therapy has been of great interest since people realized that CF can be affected by exercise. Exercise alone can be used as an ACT (airway clearance technique), which promotes the removal of mucosal cilia. Exercise therapy is more easily accepted by any society, which helps to normalize the lives of CF patients, rather than placing a psychological burden on them. In this chapter, we will review the latest research progress about exercise in CF.
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Affiliation(s)
- Shengguang Ding
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Chongjun Zhong
- Department of Thoracic and Cardiovascular Surgery, The Second Affiliated Hospital of Nantong University, Nantong, China
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Sovtic A, Minic P, Markovic-Sovtic G, Trajkovic GZ. Respiratory Muscle Strength and Exercise Performance in Cystic Fibrosis-A Cross Sectional Study. Front Pediatr 2018; 6:244. [PMID: 30234080 PMCID: PMC6131603 DOI: 10.3389/fped.2018.00244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 08/14/2018] [Indexed: 11/13/2022] Open
Abstract
Introduction: Decreased respiratory muscle strength in patients with cystic fibrosis (CF) may cause progressive exercise intolerance during cardiopulmonary exercise testing (CPET), and may contribute to the development of chronic respiratory insufficiency. The aim of this study is to evaluate exercise tolerance during CPET of children and adults with clinically stable CF who exhibit different respiratory muscle strength. Methods: Sixty-nine clinically stable CF subjects aged 8-33 years underwent spirometry, body plethysmography, CPET, and respiratory muscle strength measurement. Respiratory muscle strength was measured using maximal inspiratory pressures (Pimax) and maximal expiratory pressures (Pemax). Participants were stratified into three groups according to Pimax values:below normal (≤80% predicted), normal (81-100% predicted), and above normal (>100% predicted). A similar stratification of participants was made according to Pemax values. The oxygen consumption on peak load (VO2peak) was expressed relative to BM (VO2peak/kg), relative to BM raised by the exponent of 0.67 (VO2peak/kg0.67) and as log-linear adjustment of VO2peak (VO2peak/kg-alo). Results: Participants with low Pemax values had a lower mean maximum load per kilogram/predicted (Wmax; p = 0.001) VO2peak/kg (p = 0.006), VO2peak/kg0.67 (p = 0.038) and VO2peak/kg-alo (p = 0.001). There were no significant differences in exercise tolerance parameters with regard to Pimax values. Stepwise multiple linear regressions confirmed that Pemax (B = 24.88, β = 0.48, p < 0.001) was the most powerful predictor of Wmax. There were no statistically significant differences in age, lung function parameters, exacerbation score, or respiratory muscle strength according to gender. Conclusions: In subjects with clinically stable CF, expiratory muscle strength is associated with a decrease in exercise performance during CPET and can predict exercise intolerance. Increase in expiratory muscle strength by patient specific rehabilitation protocols would result in improvement of exercise tolerance.
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Affiliation(s)
- Aleksandar Sovtic
- Department of Pulmonology, Mother and Child Health Institute of Serbia, Belgrade, Serbia.,School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Predrag Minic
- Department of Pulmonology, Mother and Child Health Institute of Serbia, Belgrade, Serbia.,School of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Goran Z Trajkovic
- School of Medicine, University of Belgrade, Belgrade, Serbia.,Institute for Medical Statistics, Belgrade, Serbia
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9
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Peripheral muscle abnormalities in cystic fibrosis: Etiology, clinical implications and response to therapeutic interventions. J Cyst Fibros 2017; 16:538-552. [DOI: 10.1016/j.jcf.2017.02.007] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 02/10/2017] [Accepted: 02/12/2017] [Indexed: 12/14/2022]
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10
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Dassios T. Determinants of respiratory pump function in patients with cystic fibrosis. Paediatr Respir Rev 2015; 16:75-9. [PMID: 24661942 DOI: 10.1016/j.prrv.2014.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Revised: 01/15/2014] [Accepted: 01/15/2014] [Indexed: 10/25/2022]
Abstract
Respiratory failure constitutes the major cause of morbidity and mortality in patients with Cystic Fibrosis (CF). Respiratory failure could either be due to lung parenchyma damage or to insufficiency of the respiratory pump which consists of the respiratory muscles, the rib cage and the neuromuscular transmission pathways. Airway obstruction, hyperinflation and malnutrition have been historically recognised as the major determinants of respiratory pump dysfunction in CF. Recent research has identified chronic infection, genetic predisposition, dietary and pharmaceutical interventions as possible additional determinants of this impairment. Furthermore, new methodological approaches in assessing respiratory pump function have led to a better understanding of the pathogenesis of respiratory pump failure in CF. Finally, respiratory muscle function could be partially preserved in CF patients with structured interventions such as aerobic exercise, inspiratory muscle training and non-invasive ventilation and CF patients could consequently be relatively protected from respiratory fatigue and respiratory failure.
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Affiliation(s)
- Theodore Dassios
- Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, CB2 0SW, UK.
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11
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Wells GD, Wilkes DL, Schneiderman JE, Thompson S, Coates AL, Ratjen F. Physiological correlates of pulmonary function in children with cystic fibrosis. Pediatr Pulmonol 2014; 49:878-84. [PMID: 24166871 DOI: 10.1002/ppul.22928] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 08/17/2013] [Indexed: 11/09/2022]
Abstract
RATIONALE Although peak aerobic capacity (VO(2peak)) has been linked to outcome in patients with cystic fibrosis (CF), measuring is time consuming, and requires expensive equipment and expertise that is not readily available in all centers. Other fitness parameters such as peak anaerobic power, measures of power and strength may be simpler to deliver in the clinic. The relationship between these measures and established outcomes such as forced expiratory volume in one second (FEV(1)) and peak aerobic power (VO(2peak)) in CF remains unclear. Therefore we evaluated (a) aerobic fitness, (b) anaerobic fitness, and (c) upper and lower body muscle strength to determine their relationship to FEV(1) and VO(2peak) in children with CF. METHODS Eighty-two patients (7-18 years) with CF (40 female) from the CF clinic at The Hospital for Sick Children in Toronto performed a maximal incremental cycling test to exhaustion. Anaerobic power (W) for 10 and 30 sec cycling trials as well as vertical jump (VJ) and hand grip strength (HG) were compared to FEV(1) and VO(2peak). RESULTS Absolute VO(2peak) (R(2) = 0.16, P < 0.001), anaerobic power (R(2) = 0.21, P < 0.001), and hand grip strength (R(2) = 0.10, P = 0.003) were significantly correlated to lung function whereas measures of explosive lower body strength (VJ) were not. Anaerobic power (R(2) = 0.16, P = 0.001) and hand grip strength (R(2) = 0.08, P = 0.01) were related to VO(2peak). Vertical jump was correlated with VO(2peak) (R(2) = 0.29, P < 0.001) but not FEV(1). CONCLUSIONS Simple fitness tests such as hand grip strength and anaerobic cycle tests may be useful indicators of lung health and fitness.
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Affiliation(s)
- Greg D Wells
- Department of Physiology and Experimental Medicine, The Hospital for Sick Children, Toronto, Canada; Faculty of Kinesiology, Physical Education, The University of Toronto, Toronto, Canada
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12
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Exercise programme in patients with cystic fibrosis: A randomized controlled trial. Respir Med 2014; 108:1134-40. [DOI: 10.1016/j.rmed.2014.04.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 04/10/2014] [Accepted: 04/15/2014] [Indexed: 11/23/2022]
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Burtin C, Van Remoortel H, Vrijsen B, Langer D, Colpaert K, Gosselink R, Decramer M, Dupont L, Troosters T. Impact of exacerbations of cystic fibrosis on muscle strength. Respir Res 2013; 14:46. [PMID: 23601143 PMCID: PMC3637497 DOI: 10.1186/1465-9921-14-46] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 04/10/2013] [Indexed: 11/13/2022] Open
Abstract
Background Adult patients with cystic fibrosis have peripheral muscle weakness, which is related to exercise intolerance and poor prognosis. The influence of acute exacerbations on muscle strength has been poorly studied. This study aimed to investigate whether quadriceps force (QF), as assessed with an involuntary technique, changes during intravenous antibiotics therapy (IVAT) for an exacerbation. Methods QF was measured in 20 patients using twitch stimulation of the femoral nerve at the day of hospitalization (day 1) and at termination (day 14) of the IVAT. Physical activity was monitored during IVAT using a SenseWear armband. Ten stable patients served as control subjects. Results QF did not change during exacerbation (potentiated twitch force at day 1: 140 ± 42 N, at day 14: 140 ± 47 N), but a decrease was observed in individual patients. Changes in twitch force during exacerbation were correlated with time spent in activities of at least moderate intensity (r = 0.61, p = 0.007). Conclusions QF does not systematically decrease during exacerbations of cystic fibrosis. Individual changes in QF are well correlated with daily time spent in activities of at least moderate intensity.
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Affiliation(s)
- Chris Burtin
- Faculty of Kinesiology and Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
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Abstract
The ability to perform exercise is an important determinant of both longevity and quality of life for patients with Cystic Fibrosis. There are a variety of physical and behavioural factors that contribute to exercise limitation. These, such as lung function or habitual physical activity, change over time. However, these factors can also be modified by treatments and interventions. This review discusses the various factors that contribute to exercise limitation in Cystic Fibrosis, and how these change with age.
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