International Journal of Chronic Obstructive Pulmonary Disease最新文献

{"title":"A Multicenter Study of COPD and Cognitive Impairment: Unraveling the Interplay of Quantitative CT, Lung Function, HIF-1α, and Clinical Variables","authors":"Yopi Simargi, Yuda Turana, Aziza Ghanie Icksan, Alida Roswita Harahap, Kristiana Siste, Muchtaruddin Mansyur, Triya Damayanti, Maryastuti Maryastuti, Vininta Fazharyasti, Indah Puspita Dewi, Yetty Ramli, Marcel Prasetyo, Cleopas Martin Rumende","doi":"10.2147/copd.s466173","DOIUrl":"https://doi.org/10.2147/copd.s466173","url":null,"abstract":"<strong>Purpose:</strong> The exact link between cognitive impairment (CI) and chronic obstructive pulmonary disease (COPD) is still limited. Thus, we aim to find the relationship and interaction of quantitative CT (QCT), lung function, HIF-1α, and clinical factors with the development of CI among COPD patients.<br/><strong>Patients and Methods:</strong> A cross-sectional multicentre study was conducted from January 2022 to December 2023. We collected clinical data, spirometry, CT images, and venous blood samples from 114 COPD participants. Cognitive impairment assessment using the Montreal Cognitive Assessment Indonesian version (MoCA-Ina) with a cutoff value 26. The QCT analysis consists of lung density, airway wall thickness, pulmonary artery-to-aorta ratio (PA:A), and pectoralis muscles using 3D Slicer software. Serum HIF-1α analysis was performed using ELISA.<br/><strong>Results:</strong> We found significant differences between %LAA_{− 950}, age, COPD duration, BMI, FEV₁ pp, and FEV₁/FVC among GOLD grades I–IV. Only education duration was found to correlate with CI (r = 0.40; p &lt; 0.001). We found no significant difference in HIF-1α among GOLD grades (p = 0.149) and no correlation between HIF-1α and CI (p = 0.105). From multiple linear regression, we observed that the MoCA-Ina score was influenced mainly by %LAA_{− 950} (p = 0.02) and education duration (p = 0.01). The path analysis model showed both %LAA and education duration directly and indirectly through FEV₁ pp contributing to CI.<br/><strong>Conclusion:</strong> We conclude that the utilization of QCT parameters is beneficial as it can identify abnormalities and contribute to the development of CI, indicating its potential utility in clinical decision-making. The MoCA-Ina score in COPD is mainly affected by %LAA_{− 950} and education duration. Contrary to expectations, this study concludes that HIF-1α does not affect CI among COPD patients.<br/><br/><strong>Keywords:</strong> chronic obstructive pulmonary disease, cognitive impairment, emphysema lung, hypoxia inducible factor<br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficacy and Safety of Acupuncture in Managing COPD: An Overview of Systematic Reviews","authors":"Qian Zeng, Lu Liu, Ying Chen, Daohong Chen, Ziyang Zhou, Wenjiao Hu, Siyao Gong, Bin He, Wenchuan Qi, Chao Wang, Zuoqin Yang, Shuguang Yu, Ling Zhao","doi":"10.2147/copd.s464546","DOIUrl":"https://doi.org/10.2147/copd.s464546","url":null,"abstract":"<strong>Background:</strong> Acupuncture has been used as an adjuvant therapy for Chronic obstructive pulmonary disease (COPD). However, systematic reviews (SRs) and meta-analyses (MAs) have reported inconsistent results and unknown quality. This overview aimed to summarize the current SRs/MAs to provide evidence for the effectiveness and safety of acupuncture in the treatment of COPD.<br/><strong>Methods:</strong> SRs/MAs were searched via eight databases from their establishment to December 31, 2023. The methodological quality was assessed by A Measurement Tool to Assess Systematic Reviews 2 (AMSTAR 2). The risk of bias was assessed using the Risk of Bias in Systematic Review (ROBIS) tool. The Preferred Reporting Items for Systematic Reviews and Meta-analyses for Acupuncture (PRISMA-A) to evaluate the reporting quality. The Grading of Recommendations Assessment, Development and Evaluation (GRADE) was used to determine the strength of evidence. In addition, we also conducted an analysis of the acupuncture points used in the primary RCTs.<br/><strong>Results:</strong> Twenty-two SRs/MAs were included in this overview. Based on the assessment using AMSTAR 2, nineteen SRs/MAs were “critically low”. Eight SRs/MAs had a low risk of bias. Based on PRISMA-A, the reporting completeness of eighteen SRs/MAs were more than 70%. As for GRADE assessment, only three outcome measures were of high quality. COPD patients can benefit from moxibustion, acupoint application, acupoint catgut embedding, manual acupuncture, and electroacupuncture, as indicated by effectiveness in measures including lung function, 6MWD, mMRC, CAT, and acute exacerbation. In addition, the efficacy of TENS needed to be further demonstrated. The commonly used acupuncture points in the RCTs include BL13, BL23, and EX-B1.<br/><strong>Conclusion:</strong> Evidence from SRs showed that acupuncture is beneficial to lung function, acute exacerbation, 6MWD, mMRC and CAT. For SGRQ and brog scale, acupuncture should be used selectively, but this finding should still be taken with caution.<br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of a Supervised Home-Based Tele-Rehabilitation with Center-Based Pulmonary Rehabilitation: Protocol for a Randomized Non-Inferiority Multicenter Study in Ningxia","authors":"Hongxia Xin, Shuoshuo Wei, Hao Zheng, Yanchao Qi, Shuping Xu, Bei Wang, Wangshu Jiang, Ning Deng, Juan Chen","doi":"10.2147/copd.s467945","DOIUrl":"https://doi.org/10.2147/copd.s467945","url":null,"abstract":"<strong>Background:</strong> Pulmonary rehabilitation (PR) is an effective intervention for people with chronic obstructive pulmonary disease (COPD). However, fewer than 5% of eligible individuals receive pulmonary rehabilitation, largely due to limited by the accessibility of rehabilitation and difficulties associated with travel and transport. Supervised home-based tele-rehabilitation (SHTR) is an alternative model to center-based pulmonary rehabilitation. We will determine whether supervised home-based tele-rehabilitation is non-inferior to center-based pulmonary rehabilitation.<br/><strong>Methods:</strong> The participants will undergo an 8-week rehabilitation program. Pulmonary rehabilitation comprises four main modules: exercise training, education, nutritional support, and psychological and behavioral interventions. We mainly focus on the module of exercise training and education. The education module includes information on exercise training, nutrition, and psychology, which are presented in an educational booklet provided to each participant. Blinded assessors will evaluate the outcomes at baseline, post-intervention, and 6 months after the intervention. The primary outcome is the change in the 6-minute walking distance. Secondary outcomes will assess changes in the patients’ 1-minute sit-to-stand test, maximal inspiratory pressure (MIP), scales (CAT, mMRC, HAD), diaphragm ultrasound (TD, DE, DIF), changes in extrathoracic muscle volume and mass, completion rate of patient exercise prescriptions, occurrence of adverse events, as well as disease exacerbation and rehospitalization rates after rehabilitation and during the 6-month follow-up.<br/><strong>Discussion:</strong> In order to improve the accessibility of pulmonary rehabilitation and patient-related outcomes, it is necessary to propose an alternative model of pulmonary rehabilitation. This trial will establish whether a supervised home-based tele-rehabilitation is not inferior to traditional center-based pulmonary rehabilitation.<br/><strong>Trial Registration:</strong> Chinese Clinical Trial Registry ChiCTR2300076969. Registered on October 25, 2023. <br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Obesity Impact on Dyspnea in COPD Patients","authors":"Alexis Dupuis, Aurore Thierry, Jeanne-Marie Perotin, Julien Ancel, Valérian Dormoy, Sandra Dury, Gaëtan Deslée, Claire Launois","doi":"10.2147/copd.s450366","DOIUrl":"https://doi.org/10.2147/copd.s450366","url":null,"abstract":"<strong>Background:</strong> The role of obesity on dyspnea in chronic obstructive pulmonary disease (COPD) patients remains unclear. We aimed to provide an assessment of dyspnea in COPD patients according to their Body Mass Index (BMI) and to investigate the impact of obesity on dyspnea according to COPD severity.<br/><strong>Methods:</strong> One hundred and twenty seven COPD patients with BMI ≥ 18.5 kg/m² (63% male, median (interquartile range) post bronchodilator forced expiratory volume of 1 second (post BD FEV₁) at 51 (34– 66) % pred) were consecutively included. Dyspnea was assessed by mMRC (Modified medical research council) scale. Lung function tests were recorded, and emphysema was quantified on CT-scan (computed tomography-scan).<br/><strong>Results:</strong> Twenty-five percent of the patients were obese (BMI ≥ 30kg/m²), 66% of patients experienced disabling dyspnea (mMRC ≥ 2). mMRC scores did not differ depending on BMI categories (2 (1– 3) for normal weight, 2 (1– 3) 1 for overweight and 2 (1– 3) for obese patients; p = 0.71). Increased mMRC scores (0– 1 versus 2– 3 versus 4) were associated with decreased post BD-FEV₁ (p &lt; 0.01), higher static lung hyperinflation (inspiratory capacity/total lung capacity (IC/TLC), p &lt; 0.01), reduced DLCO (p &lt; 0.01) and higher emphysema scores (p &lt; 0.01). Obese patients had reduced static lung hyperinflation (IC/TLC p &lt; 0.01) and lower emphysema scores (p &lt; 0.01) than non-obese patients. mMRC score increased with GOLD grades (1– 2 versus 3– 4) in non-obese patients but not in obese patients, in association with a trend towards reduced static lung hyperinflation and lower emphysema scores.<br/><strong>Conclusion:</strong> By contrast with non-obese patients, dyspnea did not increase with spirometric GOLD grades in obese patients. This might be explained by a reduced lung hyperinflation related to the mechanical effects of obesity and a less severe emphysema in severe COPD patients with obesity.<br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association Between the Serum Phosphate Levels and Hospital Mortality as Well as 90-Day Mortality Among Critically Ill Patients with Chronic Obstructive Pulmonary Disease: A Retrospective Cohort Study","authors":"Shuang Du, Ke Lin, Jing Li, Xin Zhou, Chaolan Wang, Jun Liu, Na Li, Jian Chen","doi":"10.2147/copd.s465752","DOIUrl":"https://doi.org/10.2147/copd.s465752","url":null,"abstract":"<strong>Purpose:</strong> COPD patients frequently have abnormal serum phosphorus levels. The objective of this study was to examine the correlation between serum phosphorus levels with hospital and 90-day mortality in critically ill patients with COPD.<br/><strong>Patients and Methods:</strong> The MIMIC IV database was used for this retrospective cohort analysis. We extracted demographics, vital signs, laboratory tests, comorbidity, antibiotic usage, ventilation and scoring systems within the first 24 hours of ICU admission. Restricted cubic splines and multivariate cox regression analysis models were used to evaluate the connection between serum phosphorus with hospital and 90-day mortality. We assessed and classified various factors including gender, age, renal disease, severe liver disease, the utilization of antibiotics and congestive heart failure.<br/><strong>Results:</strong> We included a total of 3611 patients with COPD, with a median age of 70.7 years. After adjusting for all other factors, we observed a significant positive association between serum phosphate levels with both hospital mortality (HR 1.19, 95% CI: 1.07– 1.31, p&lt; 0.001) and 90-day mortality (HR 1.15, 95% CI: 1.06– 1.24, p&lt; 0.001). Compared to the medium group (Q2 ≥ 3.15, &lt; 4.0), the adjusted hazard ratios for hospital mortality were 1.47 (95% CI: 1.08– 2, p=0.013), and 1.31 (95% CI: 1.06– 1.61, p=0.013) for 90-day mortality in the high group (Q3≥ 4.0). Hospital mortality decreased at serum phosphate levels below 3.8 mg/dl (HR 0.664, 95% CI: 0.468– 0.943, p=0.022), but increased for both hospital (HR 1.312, 95% CI: 1.141– 1.509, p&lt; 0.001) and 90-day mortality (HR 1.236, 95% CI: 1.102– 1.386, p&lt; 0.001) when levels were above 3.8 mg/dl. Subgroup and sensitivity analyses yielded consistent results.<br/><strong>Conclusion:</strong> In critical ill COPD patients, this study demonstrated a non-linear association between serum phosphate levels and both hospital and 90-day mortality. Notably, there was an inflection point at 3.8 mg/dl, indicating a significant shift in outcomes. Future prospective research is necessary to validate this correlation.<br/><br/><strong>Keywords:</strong> COPD, serum phosphate, mortality, MIMIC-IV, critically ill<br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cigarette Smoke Extract Induces MUC5AC Expression Through the ROS/ IP3R/Ca2+ Pathway in Calu-3 Cells","authors":"Xiaojuan Wu, Guoyue Zhang, Xianzhi Du","doi":"10.2147/copd.s469866","DOIUrl":"https://doi.org/10.2147/copd.s469866","url":null,"abstract":"<strong>Background:</strong> Chronic obstructive pulmonary disease (COPD) is caused by exposure to noxious external particles, air pollution, and the inhalation of cigarette smoke. Airway mucus hypersecretion particularly mucin5AC (MUC5AC), is a crucial pathological feature of COPD and is associated with its initiation and progression. In this study, we aimed to investigate the effects of cigarette smoke extract (CSE) on MUC5AC expression, particularly the mechanisms by which reactive oxygen species (ROS) induce MUC5AC expression.<br/><strong>Methods:</strong> The effects of CSE on the expression of MUC5AC and mucin5B (MUC5B) were investigated in vitro in Calu-3 cells. MUC5AC and MUC5B expression levels were measured using quantitative reverse transcription-polymerase chain reaction (qRT-PCR), immunofluorescence staining, and enzyme-linked immunosorbent assay (ELISA). Total cellular levels of ROS and Ca²⁺ were determined using DCFH-DA and Fluo-4 AM. Subsequently, the expression levels of IP3R, IRE1α, p-IRE1α and XBP1s were measured by Western blotting. Gene silencing was achieved by using small-interfering RNAs.<br/><strong>Results:</strong> Our findings revealed that exposure to CSE increased MUC5AC levels and upregulated ROS, IP3R/Ca²⁺ and unfolded protein response (UPR)-associated factors. In addition, knockdown of IP3R using siRNA decreased CSE-induced Ca²⁺ production, UPR-associated factors, and MUC5AC expression. Furthermore, 10 mM N-acetyl-l-cysteine (NAC) treatment suppressed the effects of CSE, including ROS generation, IP3R/ Ca²⁺, UPR activation, and MUC5AC overexpression.<br/><strong>Conclusion:</strong> Our results suggest that ROS regulates CSE-induced UPR and MUC5AC overexpression through IP3R/ Ca²⁺ signaling. Additionally, we identified NAC as a promising therapeutic agent for mitigating CSE-induced MUC5AC overexpression.<br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the Effectiveness of the COPD Assessment Test (CAT) in Screening for Chronic Obstructive Pulmonary Disease","authors":"Nadia Al Wachami, Karima Boumendil, Maryem Arraji, Younes Iderdar, Yassmine Mourajid, Nadia Ghosne, Ali Benmoussa, Mohamed Khalis, Amal Korrida, Fatima Zahra Laamiri, Halima Lajane, Mohamed Lahbib Louerdi, Saad El Madani, Mohamed Chahboune","doi":"10.2147/copd.s460649","DOIUrl":"https://doi.org/10.2147/copd.s460649","url":null,"abstract":"<strong>Background:</strong> Chronic obstructive pulmonary disease (COPD) is a major public health problem that remains largely under-diagnosed, mainly due to the under-use of spirometry to establish the diagnosis. The aim of this study is to evaluate the effectiveness of the Moroccan Arabic dialect version of the COPD Assessment Test (CAT) in screening for COPD.<br/><strong>Methods:</strong> This was a cross-sectional study carried out in primary care facilities in Morocco, involving participants aged 40 and over. The performance of CAT in detecting cases of COPD was measured with reference to the results of spirometry, considered to be the gold Standard.<br/><strong>Results:</strong> A total of 477 participants were included in the study. The prevalence of COPD was 6.7%. Internal consistency of the Moroccan Arabic dialect version of the CAT was high, with a Cronbach’s alpha of 0.89. The total score of the CAT and of each item was significantly higher in subjects with COPD than in those without (P=0.000). Significantly negative correlations were found between CAT total score and FEV1 (r = − 0.33, p=0.000), CAT and FVC (r = − 0.22, p=0.000), CAT and FEV1/FVC ratio (r = − 0.22, p=0.000). The receiver operating characteristic curve showed an area under the curve of 0.93. A CAT score of 10 was the optimal cut-off value for COPD screening, with a sensitivity, specificity, positive predictive value, and negative predictive value of 78.1%, 93.9%, 48.1% and 98.4%, respectively.<br/><strong>Conclusion:</strong> The results of the present study showed that the CAT could be used as a screening tool for COPD. The use of this tool by healthcare professionals in primary care settings will improve and promote early diagnosis of this chronic disease.<br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk Factors of Sarcopenia in COPD Patients: A Meta-Analysis","authors":"Jingru Zhou, Yanjun Liu, Fang Yang, Meiling Jing, Xiaoli Zhong, Yanfen Wang, Yan Liu, Wenwen Ming, Huangyan Li, Tianxia Zhao, Lin He","doi":"10.2147/copd.s456451","DOIUrl":"https://doi.org/10.2147/copd.s456451","url":null,"abstract":"<strong>Objective:</strong> Sarcopenia is a common complication of COPD associated with an age-related reduction in skeletal muscle mass associated with decreased muscle strength and / or reduced mobility. The incidence of sarcopenia in patients with COPD is twice that of non-COPD patients and is associated with poor prognosis, this study aimed to investigate the influencing factors of sarcopenia in COPD patients.<br/><strong>Methods:</strong> Selected studies from PubMed, Embase, Web of Science, Cochrane Library, Wanfang, Wanfang, CNKI, CBM, and Wanfang databases as of November 12023. Patients aged 18 were selected; data were then independently extracted by two reviewers using a standard data collection form.<br/><strong>Results:</strong> In total, 17 articles reporting on 5408 patients were included. Age (OR = 1.083; 95% CI, 1.024– 1.145), ALB (OR = 0.752; 95% CI, 0.724– 0.780), BMI(OR = 0.701; 95% CI, 0.586– 0.838), smoking (OR = 1.859; 95% CI, 1.037– 3.334), diabetes (OR = 1.361; 95% CI, 1.095– 1.692), qi deficiency (OR = 9.883; 95% CI, 2.052, 47.593), GOLD C (OR =2.232; 95% CI, 1.866, 2.670) and GOLD D (OR = 2.195; 95% CI, 1.826– 2.637) were factors affecting muscle loss in COPD patients.<br/><strong>Conclusion:</strong> Sarcopenia is more prevalent in patients with COPD. Age, body mass index, smoking, diabetes mellitus, qi deficiency, ALB, and GOLD grade were the contributing factors for sarcopenia in patients with chronic obstructive pulmonary disease. In the future, medical staff should not only pay attention to the early screening of sarcopenia in high-risk groups, but also provide relevant prevention information.<br/><br/><strong>Keywords:</strong> sarcopenia, chronic obstructive pulmonary disease, prevalence, risk factors, meta-analysis<br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Causal Involvement of Immune Cells in Chronic Obstructive Pulmonary Disease: A Mendelian Randomization Study","authors":"Tiefa Guan, Yibing Qin, Nini Qu, Yushuo Pan","doi":"10.2147/copd.s460342","DOIUrl":"https://doi.org/10.2147/copd.s460342","url":null,"abstract":"<strong>Background:</strong> The immune cells play a substantial role in the development and progression of chronic obstructive pulmonary disease (COPD). We aim to investigate the causal involvement of immune cells in COPD via a Mendelian randomization (MR) analysis.<br/><strong>Methods:</strong> Published genome-wide association studies (GWAS) statistics on immune cells were analyzed, with genetic variants identified as instrumental variables (IVs). Inverse-variance weighting (IVW), weighted median, and MR-Egger regression methods were employed, along with simple mode and weighted mode adopted in the two-sample MR analysis. Sensitivity analysis was conducted to examine the heterogeneity, horizontal pleiotropy, and stability of the causal relationship.<br/><strong>Results:</strong> IVW results suggested that CCR2 on CD62L+ plasmacytoid dendritic cells (DC), CCR2 on plasmacytoid DC, CD11b on CD66b++ myeloid cells, CD19 on CD20− CD38− CD24+ memory B cell subset, CD25 on transitional B cells, and CD25++CD8br %CD8br T cells were risk factors for the development of COPD. Besides, CD127 on effector memory-like cytotoxic T lymphocytes lacking expression of co-stimulatory molecule 28 (CD28-EM CTLs) and HLA DR+ NK ACs expressing human leukocyte antigen DR molecules while being natural killer cells (%NK ACs) were protective factors for COPD.<br/><strong>Conclusion:</strong> This study unveiled a causal relationship between immune cell phenotype and COPD. These findings offer new insights for the prevention and treatment of COPD using COPD-associated immune cells.<br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exercise Attenuate Diaphragm Atrophy in COPD Mice via Inhibiting the RhoA/ROCK Signaling","authors":"Peijun Li, Yingqi Wang, Yuanyuan Cao, Jiacheng Shi, Meiling Jiang, Xiaoyu Han, Linhong Jiang, Yidie Bao, Weibing Wu, Xiaodan Liu","doi":"10.2147/copd.s460182","DOIUrl":"https://doi.org/10.2147/copd.s460182","url":null,"abstract":"<strong>Background:</strong> Exercise is an indispensable component of pulmonary rehabilitation with strong anti-inflammatory effects. However, the mechanisms by which exercise prevents diaphragmatic atrophy in COPD (chronic obstructive pulmonary disease) remain unclear.<br/><strong>Methods:</strong> Forty male C57BL/6 mice were assigned to the control (n=16) and smoke (n=24) groups. Mice in the smoke group were exposed to the cigarette smoke (CS) for six months. They were then divided into model and exercise training groups for 2 months. Histological changes were observed in lung and diaphragms. Subsequently, agonist U46639 and antagonist Y27632 of RhoA/ROCK were subjected to mechanical stretching in LPS-treated C2C12 myoblasts. The expression levels of Atrogin-1, MuRF-1, MyoD, Myf5, IL-1β, TNF-α, and RhoA/ROCK were determined by Western blotting.<br/><strong>Results:</strong> Diaphragmatic atrophy and increased RhoA/ROCK expression were observed in COPD mice. Exercise training attenuated diaphragmatic atrophy, decreased the expression of MuRF-1, and increased MyoD expression in COPD diaphragms. Exercise also affects the upregulation of RhoA/ROCK and inflammation-related proteins. In in vitro experiments with C2C12 myoblasts, LPS remarkably increased the level of inflammation and protein degradation, whereas Y27632 or combined with mechanical stretching prevented this phenomenon considerably.<br/><strong>Conclusion:</strong> RhoA/ROCK plays an important role in the prevention of diaphragmatic atrophy in COPD.<br/><br/>","PeriodicalId":13792,"journal":{"name":"International Journal of Chronic Obstructive Pulmonary Disease","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}