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Simonato M, Ricci F, Catozzi C, Storti M, Correani A, Salomone F, Cogo P, Carnielli VP. A novel deuterium-based model for measurement of exogenous surfactant using deuterium-depleted water. Pediatr Pulmonol 2022; 57:2808-2814. [PMID: 35938216 DOI: 10.1002/ppul.26104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 11/11/2022]
Abstract
Stable isotope tracers, like 13 C, can be used for the measurement of the partition between the endogenous and exogenous pulmonary disaturated-phosphatidylcholine (DSPC). Deuterium labeling methods are still not fully explored. Our aim was to investigate the feasibility of using deuterium-depleted water (DDW) and deuterium-enriched water (DEW) to measure endogenous and exogenous pulmonary DSPC in a rabbit model of surfactant depletion. Data obtained from the 13 C dilution method were used as a reference. We studied 9 adult rabbits: 4 drank DDW and 5 DEW for 5 days. Lung surfactant depletion was induced at Day 5 by repeated saline bronchoalveolar lavages (BAL), which were stored as a pool (BAL pool). After endogenous surfactant depletion, rabbits received exogenous surfactant followed by a second BAL depletion procedure (End-Experiment Pool). DSPC quantity, and palmitic acid (PA)-DSPC 2 H/1 H (δ2 H) and 13 C/12 C ratios (δ13 C) of exogenous surfactant batches and of BAL pools were measured by High-Resolution Mass Spectrometry. The amount of exogenous surfactant recovered from the lungs ranged from 45% to 81% and, it was highly correlated with those obtained with the use of the 13 C (r = 0.9844, p < 0.0001). We demonstrated that commercially available purified DDW and even low doses of DEW can be used to modify the deuterium background of endogenous surfactants with the purpose of measuring the contribution of exogenous surfactants to the endogenous alveolar surfactant pool.
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Affiliation(s)
- Manuela Simonato
- PCare laboratory, Department of Women's and Children's Health, University of Padova, Padova, Italy.,Fondazione Istituto di Ricerca Pediatrica, "Citta' della Speranza", Padova, Italy
| | - Francesca Ricci
- Pharmacology & Toxicology Department, Neonatology and Pulmonary Rare Disease Unit, Corporate Preclinical R&D, Parma, Chiesi, Italy
| | - Chiara Catozzi
- Pharmacology & Toxicology Department, Neonatology and Pulmonary Rare Disease Unit, Corporate Preclinical R&D, Parma, Chiesi, Italy
| | - Matteo Storti
- Department of Chemical & Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Alessio Correani
- Division of Neonatology, Polytechnic University of Marche and "G. Salesi" Children's Hospital, Ancona, Italy
| | - Fabrizio Salomone
- Pharmacology & Toxicology Department, Neonatology and Pulmonary Rare Disease Unit, Corporate Preclinical R&D, Parma, Chiesi, Italy
| | - Paola Cogo
- Department of Medicine, University Hospital S Maria della Misericordia, University of Udine, Udine, Italy
| | - Virgilio P Carnielli
- Division of Neonatology, Polytechnic University of Marche and "G. Salesi" Children's Hospital, Ancona, Italy
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Ricci F, Bresesti I, LaVerde PAM, Salomone F, Casiraghi C, Mersanne A, Storti M, Catozzi C, Tigli L, Zecchi R, Franceschi P, Murgia X, Simonato M, Cogo P, Carnielli V, Lista G. Surfactant lung delivery with LISA and InSurE in adult rabbits with respiratory distress. Pediatr Res 2021; 90:576-583. [PMID: 33452472 PMCID: PMC7809896 DOI: 10.1038/s41390-020-01324-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/02/2020] [Accepted: 11/22/2020] [Indexed: 01/29/2023]
Abstract
BACKGROUND In preterm infants, InSurE (Intubation-Surfactant-Extubation) and LISA (less invasive surfactant administration) techniques allow for exogenous surfactant administration while reducing lung injury associated with mechanical ventilation. We compared the acute pulmonary response and lung deposition of surfactant by LISA and InSurE in surfactant-depleted adult rabbits. METHODS Twenty-six spontaneously breathing surfactant-depleted adult rabbits (6-7 weeks old) with moderate RDS and managed with nasal continuous positive airway pressure were randomized to 3 groups: (1) 200 mg/kg of surfactant by InSurE; (2) 200 mg/kg of surfactant by LISA; (3) no surfactant treatment (Control). Gas exchange and lung mechanics were monitored for 180 min. After that, surfactant lung deposition and distribution were evaluated monitoring disaturated-phosphatidylcholine (DSPC) and surfactant protein C (SP-C), respectively. RESULTS No signs of recovery were found in the untreated animals. After InSurE, oxygenation improved more rapidly compared to LISA. However, at 180' LISA and InSurE showed comparable outcomes in terms of gas exchange, ventilation parameters, and lung mechanics. Neither DSPC in the alveolar pool nor SP-C signal distributions in a frontal lung section were significantly different between InSurE and LISA groups. CONCLUSIONS In an acute setting, LISA demonstrated efficacy and surfactant lung delivery similar to that of InSurE in surfactant-depleted adult rabbits. IMPACT Although LISA technique is gaining popularity, there are still several questions to address. This is the first study comparing LISA and InSurE in terms of gas exchange, ventilation parameters, and lung mechanics as well as surfactant deposition and distribution. In our animal study, three hours post-treatment, LISA method seems to be as effective as InSurE and showed similar surfactant lung delivery. Our findings provide some clarifications on a fair comparison between LISA and InSurE techniques, particularly in terms of surfactant delivery. They should reassure some of the concerns raised by the clinical community on LISA adoption in neonatal units.
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Affiliation(s)
- Francesca Ricci
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Ilia Bresesti
- Neonatal Intensive Care Unit, “V. Buzzi” Children’s Hospital, ASST-FBF-Sacco, Milan, Italy
| | | | - Fabrizio Salomone
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Costanza Casiraghi
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Arianna Mersanne
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Matteo Storti
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Chiara Catozzi
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Laura Tigli
- grid.467287.80000 0004 1761 6733Neonatology and Pulmonary Rare Disease Unit, Pharmacology & Toxicology, Dept. Corporate Preclinical R&D, CHIESI, Parma, Italy
| | - Riccardo Zecchi
- grid.8404.80000 0004 1757 2304Mass Spectrometry Service Center (CISM), University of Florence, Florence, Italy
| | - Pietro Franceschi
- grid.424414.30000 0004 1755 6224Unit of Computational Biology, Research and Innovation Centre, Fondazione Edmund Mach, S. Michele all’Adige (TN), Italy
| | | | - Manuela Simonato
- grid.5608.b0000 0004 1757 3470Anesthesiology and Intensive Care Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy ,PCare Laboratory, Fondazione Istituto di Ricerca Pediatrica, “Citta’ della Speranza”, Padova, Italy
| | - Paola Cogo
- grid.5390.f0000 0001 2113 062XDivision of Pediatrics, Department of Medicine, Udine University, Udine, Italy
| | - Virgilio Carnielli
- grid.411490.90000 0004 1759 6306Division of Neonatology, Department of Clinical Sciences, Polytechnic University of Marche and Azienda-Ospedaliero Universitaria Ospedali Riuniti, Ancona, Italy
| | - Gianluca Lista
- Neonatal Intensive Care Unit, "V. Buzzi" Children's Hospital, ASST-FBF-Sacco, Milan, Italy.
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