01 November 2010
Integrating lung and plasma expression of pneumo-proteins in developing biomarkers in COPD: A case study of surfactant protein D
Ruzena TkacovaCDEF, Annette McWilliamsABG, Stephen LamABG, Don D. SinABCDEFGMed Sci Monit 2010; 16(11): CR540-544 :: ID: 881219
Abstract
Background: Surfactant protein D (SP-D) is a promising blood biomarker in patients with chronic obstructive pulmonary disease (COPD). Nevertheless, circulating levels of SP-D are not related to pulmonary functions. In the present exploratory study, we created a simple index of plasma to bronchoalveolar lavage (BAL) fluid ratio of SP-D (pSP-D/bSP-D), and determined whether this index would relate to the severity of airflow limitation and hence represent a superior biomarker than pSP-D alone.
Material/Methods: In 50 ex and current smokers (mean age 57.6±7.8 years, 74% men), SP-D was measured in BAL fluid and plasma samples, and the relationships between spirometric variables and a composite parameter – the pSP-D/bSP-D ratio were determined.
Results: There was a significant inverse correlation between the pSP-D/bSP-D ratio and the severity of airflow obstruction, as measured by FEV1/FVC (p=0.012). In contrast, no relationship was observed between FEV1/FVC and pSP-D alone.
Conclusions: We suggest that integrating both lung and plasma expression of pneumo-proteins may be more useful than plasma expression alone in developing pneumo-proteins as potential biomarkers in COPD.
Keywords: Pulmonary Surfactant-Associated Protein D - blood, Pulmonary Disease, Chronic Obstructive - pathology, Lung - metabolism, Cross-Sectional Studies, Bronchoalveolar Lavage Fluid - chemistry, Biological Markers - blood, Respiratory Function Tests, Smoking - physiopathology
Editorial
01 November 2024 : Editorial
Editorial: Artificial Intelligence (AI), Digital Image Analysis, and the Future of Cancer Diagnosis and PrognosisDOI: 10.12659/MSM.947038
Med Sci Monit 2024; 30:e947038
In Press
Animal Research
Impact of Fresh Khat Extract on Proinflammatory Cytokines and Hepatic and Renal ResponsesMed Sci Monit In Press; DOI: 10.12659/MSM.946108
Review article
Epigenetic and Immune Mechanisms Linking Breastfeeding to Lower Breast Cancer RatesMed Sci Monit In Press; DOI: 10.12659/MSM.945451
Clinical Research
Comprehensive Analysis of Immune Infiltration and Key Genes in Peri-Implantitis Using Bioinformatics and Mo...Med Sci Monit In Press; DOI: 10.12659/MSM.941870
Clinical Research
High-Resolution Anorectal Manometry and Balloon Expulsion Test Outcomes in Functional Constipation: A Compa...Med Sci Monit In Press; DOI: 10.12659/MSM.944599
Most Viewed Current Articles
17 Jan 2024 : Review article 6,121,942
Vaccination Guidelines for Pregnant Women: Addressing COVID-19 and the Omicron VariantDOI :10.12659/MSM.942799
Med Sci Monit 2024; 30:e942799
14 Dec 2022 : Clinical Research 1,908,549
Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase LevelsDOI :10.12659/MSM.937990
Med Sci Monit 2022; 28:e937990
16 May 2023 : Clinical Research 695,097
Electrophysiological Testing for an Auditory Processing Disorder and Reading Performance in 54 School Stude...DOI :10.12659/MSM.940387
Med Sci Monit 2023; 29:e940387
07 Jan 2022 : Meta-Analysis 259,824
Efficacy and Safety of Light Therapy as a Home Treatment for Motor and Non-Motor Symptoms of Parkinson Dise...DOI :10.12659/MSM.935074
Med Sci Monit 2022; 28:e935074