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Sarkar S, Barnaby R, Nymon AB, Taatjes DJ, Kelley TJ, Stanton BA. Extracellular vesicles secreted by primary human bronchial epithelial cells reduce Pseudomonas aeruginosa burden and inflammation in cystic fibrosis mouse lung. Am J Physiol Lung Cell Mol Physiol 2024; 326:L164-L174. [PMID: 38084406 PMCID: PMC11279747 DOI: 10.1152/ajplung.00253.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/18/2023] [Accepted: 12/05/2023] [Indexed: 01/26/2024] Open
Abstract
Cystic fibrosis (CF) results in a reduction in the volume of airway surface liquid, increased accumulation of viscous mucus, persistent antibiotic-resistant lung infections that cause chronic inflammation, and a decline in lung function. More than 50% of adults with CF are chronically colonized by Pseudomonas aeruginosa (P. aeruginosa), the primary reason for morbidity and mortality in people with CF (pwCF). Although highly effective modulator therapy (HEMT) is an important part of disease management in CF, HEMT does not eliminate P. aeruginosa or lung inflammation. Thus, new treatments are required to reduce lung infection and inflammation in CF. In a previous in vitro study, we demonstrated that primary human bronchial epithelial cells (HBECs) secrete extracellular vesicles (EVs) that block the ability of P. aeruginosa to form biofilms by reducing the abundance of several proteins necessary for biofilm formation as well as enhancing the sensitivity of P. aeruginosa to β-lactam antibiotics. In this study, using a CF mouse model of P. aeruginosa infection, we demonstrate that intratracheal administration of EVs secreted by HBEC reduced P. aeruginosa lung burden and several proinflammatory cytokines including IFN-γ, TNF-α, and MIP-1β in bronchoalveolar lavage fluid (BALF), even in the absence of antibiotics. Moreover, EVs decreased neutrophils in BALF. Thus, EVs secreted by HBEC reduce the lung burden of P. aeruginosa, decrease inflammation, and reduce neutrophils in a CF mouse model. These results suggest that HBEC via the secretion of EVs may play an important role in the immune response to P. aeruginosa lung infection.NEW & NOTEWORTHY Our findings show that extracellular vesicles secreted by primary human bronchial epithelial cells significantly reduce Pseudomonas aeruginosa burden, inflammation, and weight loss in a cystic fibrosis mouse model of infection.
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Affiliation(s)
- Sharanya Sarkar
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
| | - Roxanna Barnaby
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
| | - Amanda B Nymon
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Center for Biomedical Shared Resources, Larner College of Medicine, University of Vermont, Burlington, Vermont, United States
| | - Thomas J Kelley
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Bruce A Stanton
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
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Wilschanski M, Munck A, Carrion E, Cipolli M, Collins S, Colombo C, Declercq D, Hatziagorou E, Hulst J, Kalnins D, Katsagoni CN, Mainz JG, Ribes-Koninckx C, Smith C, Smith T, Van Biervliet S, Chourdakis M. ESPEN-ESPGHAN-ECFS guideline on nutrition care for cystic fibrosis. Clin Nutr 2024; 43:413-445. [PMID: 38169175 DOI: 10.1016/j.clnu.2023.12.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Nutritional status is paramount in Cystic Fibrosis (CF) and is directly correlated with morbidity and mortality. The first ESPEN-ESPGHAN-ECFS guidelines on nutrition care for infants, children, and adults with CF were published in 2016. An update to these guidelines is presented. METHODS The study was developed by an international multidisciplinary working group in accordance with officially accepted standards. Literature since 2016 was reviewed, PICO questions were discussed and the GRADE system was utilized. Statements were discussed and submitted for on-line voting by the Working Group and by all ESPEN members. RESULTS The Working Group updated the nutritional guidelines including assessment and management at all ages. Supplementation of vitamins and pancreatic enzymes remains largely the same. There are expanded chapters on pregnancy, CF-related liver disease, and CF-related diabetes, bone disease, nutritional and mineral supplements, and probiotics. There are new chapters on nutrition with highly effective modulator therapies and nutrition after organ transplantation.
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Affiliation(s)
- Michael Wilschanski
- Pediatric Gastroenterology, Hadassah Hebrew University Medical Center, Jerusalem, Israel.
| | - Anne Munck
- Cystic Fibrosis Centre, Hopital Necker-Enfants Malades, AP-HP, Paris, France
| | - Estefania Carrion
- Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, Canada
| | - Marco Cipolli
- Cystic Fibrosis Center, Azienda Ospedaliera Universitaria Integrata, Verona, Italy
| | - Sarah Collins
- CF Therapies Team, Royal Brompton & Harefield Hospital, London, UK
| | - Carla Colombo
- University of Milan, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Dimitri Declercq
- Cystic Fibrosis Reference Centre, Ghent University Hospital and Department of Internal Medicine and Paediatrics, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Elpis Hatziagorou
- Cystic Fibrosis Unit, 3rd Pediatric Dept, Hippokration Hospital, Aristotle University of Thessaloniki, Greece
| | - Jessie Hulst
- Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, Canada; Department of Pediatrics and Department of Nutritional Sciences, The University of Toronto, Toronto, Canada
| | - Daina Kalnins
- Department of Clinical Dietetics, The Hospital for Sick Children, Toronto, Canada
| | - Christina N Katsagoni
- Department of Clinical Nutrition, Agia Sofia Children's Hospital, Athens, Greece; EFAD, European Specialist Dietetic Networks (ESDN) for Gastroenterology, Denmark
| | - Jochen G Mainz
- Brandenburg Medical School, University Hospital. Klinikum Westbrandenburg, Brandenburg an der Havel, Germany
| | - Carmen Ribes-Koninckx
- Pediatric Gastroenterology and Paediatric Cystic Fibrosis Unit. La Fe Hospital & La Fe Research Institute, Valencia, Spain
| | - Chris Smith
- Department of Dietetics, Royal Alexandra Children's Hospital, Brighton, UK
| | - Thomas Smith
- Independent Patient Consultant Working at Above-disease Level, UK
| | | | - Michael Chourdakis
- School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
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Escaldelai FMD, Silva Filho LVRFD, Neri LDCL, Bergamaschi DP. Quality of anthropometric data measured in children and adolescents with cystic fibrosis: a scoping review. REVISTA PAULISTA DE PEDIATRIA : ORGAO OFICIAL DA SOCIEDADE DE PEDIATRIA DE SAO PAULO 2023; 41:e2021333. [PMID: 36888749 PMCID: PMC9984155 DOI: 10.1590/1984-0462/2023/41/2021333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 05/06/2022] [Indexed: 03/08/2023]
Abstract
OBJECTIVE This study aimed to identify methodological aspects involved in determining anthropometric measurements among studies assessing the nutritional status of individuals with cystic fibrosis (CF). METHODS A search of the literature was performed on MEDLINE via Pubmed, Embase, and Web of Science databases. The population comprised children and adolescents with CF. Observational studies and clinical trials using anthropometric and body composition measures and indices determined by dual-energy X-ray absorptiometry (DXA) and bioelectrical impedance assessment (BIA) were included. Use of a standardized procedure for data collection was defined when details on the instruments and their calibration were given, the measuring procedures were described, and when it was clear measures had been determined by a trained team, or the use of an anthropometric reference manual was cited. Data extracted were expressed as absolute and relative frequencies. RESULTS A total of 32 articles were included, and a total of 233 measures or indices were observed. The most frequently used measures were body mass index (kg/m2; 35%), weight (kg; 33%), and height (cm; 33%). Among the 28 studies that used anthropometric measures, 21 (75%) provided a complete or partial description of the measurement instruments used, 3 (11%) reported information on equipment calibration, 10 (36%) indicated the measurement procedures employed by assessors, and 2 (7%) stated a trained team had carried out the measurements. CONCLUSIONS The poor description of measuring procedures precluded a meaningful evaluation of data quality. Scientific debate on this theme can help raise awareness of the need to ensure quality in collecting and fully presenting data.
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Ritchie H, Nahikian-Nelms M, Roberts K, Gemma S, Shaikhkhalil A. The prevalence of aberrations in body composition in pediatric cystic fibrosis patients and relationships with pulmonary function, bone mineral density, and hospitalizations. J Cyst Fibros 2021; 20:837-842. [PMID: 33933345 DOI: 10.1016/j.jcf.2021.04.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 03/27/2021] [Accepted: 04/07/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Body mass index (BMI) correlates with clinical outcomes in cystic fibrosis but has limitations. Body composition aberrations in CF are multifactorial. We sought to evaluate body composition and relationships with pulmonary function, bone health, and hospital admissions. Other aims included defining body composition indices in a cohort of children with CF. METHODS We conducted a retrospective review of patients with CF, age 8-18 years, seen at Nationwide Children's Hospital (2015-2020). Indices of body composition measured by dual-energy x-ray absorptiometry(DXA) scans. Data included fat mass, fat-free mass (FFM), forced expiratory volume in one second (FEV1%), bone mineral density (BMD), and hospital admissions. NWA was defined as BMI 5th-85th percentile, body fat percentage >85th percentile. FFMD defined as FFMI <10th percentile. STATISTICS T-tests compared NWA, FFMD and clinical measurements. Pearson correlations analyzed fat-free mass index (FFMI), fat mass index (FMI), BMI and clinical measurements. RESULTS This study included 114 patients. Mean age 12 years, 72 female. A high prevalence of FFMD existed (n=66, 38.6%). FMI and FFMI correlated with FEV1% (r: 0.23, p:0.01, r: 0.36, p<0.001, respectively) and BMD (r: 0.29, p:0.002). FMI and hospital admissions were related (r:-0.23,p:0.01). FFMD was associated with 9.5% lower FEV1% (p=0.001) and lower BMD Z-score by 1.1 (p<0.001) when compared to no FFMD. CONCLUSION This cohort of children with CF had a high prevalence of FFMD and low prevalence of NWA. FFMD was associated with worsened clinical measurements. Patients with FFMD need additional exercise or nutritional intervention. Heterogeneity of body composition definitions creates need for more research.
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Affiliation(s)
- Hannah Ritchie
- The Ohio State University, School of Health and Rehabilitation Sciences, 453 W. 10th Avenue, Columbus, OH, 43210, USA.
| | - Marcia Nahikian-Nelms
- The Ohio State University, School of Health and Rehabilitation Sciences, 453 W. 10th Avenue, Columbus, OH, 43210, USA.
| | - Kristen Roberts
- The Ohio State University, School of Health and Rehabilitation Sciences, 453 W. 10th Avenue, Columbus, OH, 43210, USA; The Ohio State University Wexner Medical Center, Division of Gastroenterology, Hepatology, and Nutrition, 2nd Floor Doan Office Tower, 395 W. 12th Ave., Columbus, OH 43210-1228, USA.
| | - Susan Gemma
- Nationwide Children's Hospital, Division of Pulmonary Medicine, 700 Children's Drive, Columbus, OH 43205, USA.
| | - Ala Shaikhkhalil
- Nationwide Children's Hospital, Division of Gastroenterology, Hepatology, and Nutrition, 700 Children's Drive, Columbus, OH 43205, USA.
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Owen E, Williams JE, Davies G, Wallis C, Grant RL, Fewtrell MS. Growth, Body Composition, and Lung Function in Prepubertal Children with Cystic Fibrosis Diagnosed by Newborn Screening. Nutr Clin Pract 2020; 36:1240-1246. [PMID: 33301217 DOI: 10.1002/ncp.10604] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 10/17/2020] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Children with cystic fibrosis (CF) are at risk of altered body composition (BC). Newborn screening (NBS) may lead to improved BC outcomes. We investigated BC and its relationship with lung function in prepubertal children diagnosed with CF by NBS. Secondary aims explored predictors of fat-free mass (FFM) and lung function. METHODS Thirty-seven screened (non-meconium ileus) children with CF (20 boys) born 2007-2012 had a dual-energy x-ray absorptiometry scan at 5-8 years to determine whole-body (WB) and appendicular BC. Anthropometry was performed and routine spirometry recorded. Results were converted to z-scores, height-adjusted (fat mass index [FMI] and FFM index [FFMI]) and compared with population mean values. Predictors of forced expiratory volume in 1 second (FEV1 ) were assessed using linear regression. RESULTS Height, body mass index (BMI), and FEV1 were within normal limits, however, weight and BC were significantly low compared with reference data (weight, P = .03; WB FMI, P = .001; WB FFMI, P = .009). Gender differences were detected, with lower appendicular BC in boys and lower weight, BMI, and BC in girls. The association between FEV1 and WB FFMI (r = 0.38; P = .02) was stronger than with BMI (r = 0.29; P = .08). WB FFMI was the only significant predictor of FEV1 in a multivariable model (95% CI, 0.11-0.99; P = .016). CONCLUSION In this NBS CF population, gender differences in growth and BC were apparent despite preserved lung function. These results support BC assessment in prepubertal children, particularly girls, with an opportunity to direct interventions to optimize FFM.
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Affiliation(s)
- Elizabeth Owen
- Dietetics Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Jane E Williams
- Department of Population, Policy and Practice, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Gwyneth Davies
- Infection, Immunity and Inflammation Research and Teaching Department, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Colin Wallis
- Respiratory Unit, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | | | - Mary S Fewtrell
- Department of Population, Policy and Practice, University College London Great Ormond Street Institute of Child Health, London, UK
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Comparison of International Growth Standards for Assessing Nutritional Status in Cystic Fibrosis: The GreeCF Study. J Pediatr Gastroenterol Nutr 2020; 71:e35-e39. [PMID: 32102088 DOI: 10.1097/mpg.0000000000002679] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVE The aim of the study was to compare 3 international growth references and explore their differences in assessing growth in Greek school-aged patients with cystic fibrosis (CF). METHODS Sample included 114 patients (50 boys, age 11.5 ± 3.9 years), provided care at Aghia Sofia Children's Hospital, Greece. Anthropometrics and predicted forced expiratory volume in 1 second (FEV1%) were measured. Body mass index (BMI) and height z scores were computed according to the Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), and International Obesity Task Force (IOTF) references. Agreement between methods was analyzed with kappa statistics, repeated-measures analysis of variance, and Bland-Altman analysis. The relationship between FEV1% and BMI was explored with linear regression. RESULTS Mean CDC BMI z score was the lowest (0.06 ± 1.08), followed by WHO (0.17 ± 1.14) and IOTF (0.35 ± 1.05) (P ≤ 0.001 for all). The CDC and WHO growth references highly agreed for most weight status strata and stunting; all other comparisons produced lower agreements. Except for CDC and IOTF BMI z scores, all other comparisons produced wide levels of agreement and proportional bias. CDC reference classified more children as attaining low or normal weight, against WHO or IOTF (P ≤ 0.001 for all). Lowest prevalence of ideal and excess weight was recorded by CDC, compared to all other standards (P ≤ 0.001 for all). All BMI z scores provided moderate associations with FEV1%. CONCLUSION Large variations across weight status classification were present when employing 3 growth standards in school-aged patients . Given than BMI z-scores from all references provided comparable associations with pulmonary function, our data indicate that no studied reference is better than others in assessing growth in CF.
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Zeng X, Liu D, Zhao X, Chao L, Li Y, Li H, Li W, Gui L, Wu W. Association of bone mineral density with lung function in a Chinese general population: the Xinxiang rural cohort study. BMC Pulm Med 2019; 19:239. [PMID: 31818275 PMCID: PMC6902516 DOI: 10.1186/s12890-019-1008-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 11/25/2019] [Indexed: 11/29/2022] Open
Abstract
Background Bone mineral density (BMD) has been positively associated with lung function in patients diagnosed with respiratory diseases such as chronic obstructive pulmonary disease (COPD) and cystic fibrosis. However, the relationship between BMD and lung function is inconsistent in the general population. Methods To investigate the association between BMD and lung function in a Chinese general population, a total of 1024 adults aged 40–70 years old from Qiliying (an industrial polluted exposure area) and Langgongmiao (the reference area with non-industrial pollution) were recruited and underwent BMD and spirometry tests. Results Both BMD and lung function levels were lower in the exposed area compared to the reference area. In addition, BMD and lung function levels were also lower in females compared to males. Both Spearman and partial correlation analyses showed that BMD was positively correlated with FVC and FEV1. After adjusting linear regression analyses for potential confounding factors, every 0.1 g/cm2 drop in BMD was associated with 53.0 mL decrease in FVC and 33.5 mL decrease in FEV1. Conclusions A reduction of BMD is associated with lower lung function in a general population from China.
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Affiliation(s)
- Xiang Zeng
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China.,Henan International Collaborative Laboratory for Health Effects and Intervention of Air Pollution, School of Public Health, Xinxiang Medical University, Xinxiang, 453003, China.,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003, Henan, China
| | - Dongling Liu
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, China
| | - Xiangmei Zhao
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China
| | - Ling Chao
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China
| | - Yuchun Li
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China
| | - Huijun Li
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China
| | - Wen Li
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China
| | - Lihui Gui
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China
| | - Weidong Wu
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Xinxiang, 453003, Henan, China. .,Henan International Collaborative Laboratory for Health Effects and Intervention of Air Pollution, School of Public Health, Xinxiang Medical University, Xinxiang, 453003, China. .,Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, 453003, Henan, China.
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Tan SMJ, Coffey MJ, Ooi CY. Differences in clinical outcomes of paediatric cystic fibrosis patients with and without meconium ileus. J Cyst Fibros 2019; 18:857-862. [PMID: 31672555 DOI: 10.1016/j.jcf.2019.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 09/13/2019] [Accepted: 09/14/2019] [Indexed: 11/15/2022]
Abstract
BACKGROUND Meconium ileus (MI) affects up to 20% of newborns with cystic fibrosis (CF). We compared clinical outcomes between Australian paediatric CF patients with and without meconium ileus (non-MI). METHODS This was a retrospective case-control study of MI and non-MI patients in New South Wales, Australia, from 1988 to 2010. MI patients were matched 1:1 with pancreatic insufficient non-MI patients for age, sex and CF clinic. Clinical measurements, nutrition and gastrointestinal outcomes over this period were compared between groups using linear mixed models for continuous variables to account for age. RESULTS There were 162 matched pairs (N=324, 52% female) with mean (SD) age of 15.3 (8.2) and 14.9 (7.9) years for MI and non-MI patients respectively (P=0.6). MI patients aged 5-23 had poorer FEV1% compared to non-MI patients (estimate -0.070 SE [0.02], P=0.003). There were no significant differences in P. aeruginosa isolation rates; however S. aureus isolation rates were lower in MI patients (72%) compared to non-MI (82%) (OR 0.6 [0.3-1.0], P=0.03). Chronic colonisation rates for P. aeruginosa and S. aureus were not significantly different between groups. MI patients aged 2-20 had significantly lower BMI Z-scores over time (estimate -0.25 SE [0.1], P=0.02). MI patients were more likely to receive oral feed supplements (OR 2.8 [1.4-6.1], P=0.003) and gastrostomy formation (OR 4.4 [1.1-24.6], P=0.02). CONCLUSIONS CF patients with MI may have worse lung function, growth and nutrition than non-MI patients over time. Meconium ileus may be an early poor prognostic factor for CF.
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Affiliation(s)
- Su Min Joyce Tan
- Department of Gastroenterology, Sydney Children's Hospital, High Street, Randwick NSW 2031, Australia
| | - Michael J Coffey
- Discipline of Paediatrics, School of Women's and Children's Health, University of New South Wales, Sydney NSW 2052, Australia
| | - Chee Y Ooi
- Department of Gastroenterology, Sydney Children's Hospital, High Street, Randwick NSW 2031, Australia; Discipline of Paediatrics, School of Women's and Children's Health, University of New South Wales, Sydney NSW 2052, Australia; Molecular and Integrative Cystic Fibrosis (miCF) Research Centre, Sydney Children's Hospital, High Street, Randwick NSW 2031, Australia.
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Rosenjack J, Hodges CA, Darrah RJ, Kelley TJ. HDAC6 depletion improves cystic fibrosis mouse airway responses to bacterial challenge. Sci Rep 2019; 9:10282. [PMID: 31311988 PMCID: PMC6635416 DOI: 10.1038/s41598-019-46555-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/29/2019] [Indexed: 02/07/2023] Open
Abstract
The hypothesis of this study was that Hdac6 depletion would restore cystic fibrosis (CF) responses to bacterial challenge to more wild type profiles using a CF mouse model. CF mice harboring the F508del Cftr mutation respond to bacterial challenge with 25,000 CFU Pseudomonas aeruginosa embedded into agarose beads to slow clearance. CF mice respond significantly more aggressively to this challenge compared to WT mice with respect to bacterial clearance, weight loss, neutrophil recruitment, and MIP-2 production. Depletion of Hdac6 expression in the CF mice (CF/Hdac6) significantly improves these responses to more WT levels. Weight loss in response to infection is most severe in CF mice and significantly attenuated in CF/Hdac6 mice. Bacterial levels are reduced at a faster rate in CF/Hdac6 mice compared to CF mice where infection persists. Percent neutrophils in lung lavage fluid post-infection are significantly higher in CF mice, but returned to WT levels with CF/Hdac6 mice. Similarly, CF Mip-2 levels are restored to WT levels in the absence of Hdac6 expression. These data demonstrate that Hdac6 depletion restores CF responses to bacterial challenge to WT-like profiles and offer a potential therapeutic avenue for addressing inflammation and infection in CF airways independently of Cftr correction.
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Affiliation(s)
- Julie Rosenjack
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA
| | - Craig A Hodges
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA
| | - Rebecca J Darrah
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA
| | - Thomas J Kelley
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA.
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The nutritional status in CF: Being certain about the uncertainties. Clin Nutr ESPEN 2019; 29:15-21. [DOI: 10.1016/j.clnesp.2018.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 09/14/2018] [Accepted: 10/17/2018] [Indexed: 11/19/2022]
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