Priyanka Choudhury1, Anindita Bhattacharya1, Sanjukta Dasgupta1, Nilanjana Ghosh1, Sayoni Senpupta2, Mamata Joshi3, Parthasarathi Bhattacharyya2, Koel Chaudhury4. 1. School of Medical Science and Technology (SMST), Indian Institute of Technology Kharagpur, Kharagpur, 721302, India. 2. Institute of Pulmocare and Research, Kolkata, India. 3. National Facility for High-Field NMR, Tata Institute of Fundamental Research, Mumbai, India. 4. School of Medical Science and Technology (SMST), Indian Institute of Technology Kharagpur, Kharagpur, 721302, India. koel@smst.iitkgp.ac.in.
Abstract
INTRODUCTION: Chronic obstructive pulmonary disease (COPD) associated pulmonary hypertension (COPD-PH), one of the most prevalent forms of PH, is a major burden on the healthcare system. Although PH in COPD is usually of mild-to-moderate severity, its presence is associated with shorter survival, more frequent exacerbations and worse clinical outcomes. The pathophysiologic mechanisms responsible for PH development in COPD patients remain unclear. It is envisioned that a better understanding of the underlying mechanism will help in diagnosis and future treatment strategies. OBJECTIVES: The present study aims to determine metabolomic alterations in COPD-PH patients as compared to healthy controls. Additionally, to ensure that the dysregulated metabolites arise due to the presence of PH per se, an independent COPD cohort is included for comparison purposes. METHODS: Paired serum and exhaled breath condensate (EBC) samples were collected from male patients with COPD-PH (n = 60) in accordance with the 2015 European Society of Cardiology (ESC)/European Respiratory Society (ERS) guidelines. Age, sex and BMI matched healthy controls (n = 57) and COPD patients (n = 59) were recruited for comparison purposes. All samples were characterized using 1H nuclear magnetic resonance (NMR) spectroscopy. RESULTS: Fifteen serum and 9 EBC metabolites were found to be significantly altered in COPD-PH patients as compared to healthy controls. Lactate and pyruvate were dysregulated in both the biofluids and were further correlated with echocardiographic systolic pulmonary artery pressure (sPAP). Multivariate analysis showed distinct class separation between COPD-PH and COPD. CONCLUSIONS: The findings of this study indicate an increased energy demand in patients with COPD-PH. Furthermore, both lactate and pyruvate correlate with sPAP, indicating their importance in the clinical course of the disease.
INTRODUCTION: Chronic obstructive pulmonary disease (COPD) associated pulmonary hypertension (COPD-PH), one of the most prevalent forms of PH, is a major burden on the healthcare system. Although PH in COPD is usually of mild-to-moderate severity, its presence is associated with shorter survival, more frequent exacerbations and worse clinical outcomes. The pathophysiologic mechanisms responsible for PH development in COPD patients remain unclear. It is envisioned that a better understanding of the underlying mechanism will help in diagnosis and future treatment strategies. OBJECTIVES: The present study aims to determine metabolomic alterations in COPD-PH patients as compared to healthy controls. Additionally, to ensure that the dysregulated metabolites arise due to the presence of PH per se, an independent COPD cohort is included for comparison purposes. METHODS: Paired serum and exhaled breath condensate (EBC) samples were collected from male patients with COPD-PH (n = 60) in accordance with the 2015 European Society of Cardiology (ESC)/European Respiratory Society (ERS) guidelines. Age, sex and BMI matched healthy controls (n = 57) and COPD patients (n = 59) were recruited for comparison purposes. All samples were characterized using 1H nuclear magnetic resonance (NMR) spectroscopy. RESULTS: Fifteen serum and 9 EBC metabolites were found to be significantly altered in COPD-PH patients as compared to healthy controls. Lactate and pyruvate were dysregulated in both the biofluids and were further correlated with echocardiographic systolic pulmonary artery pressure (sPAP). Multivariate analysis showed distinct class separation between COPD-PH and COPD. CONCLUSIONS: The findings of this study indicate an increased energy demand in patients with COPD-PH. Furthermore, both lactate and pyruvate correlate with sPAP, indicating their importance in the clinical course of the disease.
Authors: Olivier Cloarec; Marc E Dumas; Johan Trygg; Andrew Craig; Richard H Barton; John C Lindon; Jeremy K Nicholson; Elaine Holmes Journal: Anal Chem Date: 2005-01-15 Impact factor: 6.986
Authors: Renata Bujak; Jesús Mateo; Isabel Blanco; José Luis Izquierdo-García; Danuta Dudzik; Michał J Markuszewski; Victor Ivo Peinado; Martín Laclaustra; Joan Albert Barberá; Coral Barbas; Jesús Ruiz-Cabello Journal: PLoS One Date: 2016-08-03 Impact factor: 3.240