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Enk D, Spraider P, Abram J, Barnes T. Commentary: Flow-controlled ventilation maintains gas exchange and lung aeration in a pediatric model of healthy and injured lungs: a randomized cross-over experimental study. Front Pediatr 2023; 11:1122434. [PMID: 37334222 PMCID: PMC10275487 DOI: 10.3389/fped.2023.1122434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 05/17/2023] [Indexed: 06/20/2023] Open
Affiliation(s)
- Dietmar Enk
- Faculty of Medicine, University of Münster, Münster, Germany
| | - Patrick Spraider
- Department of Anesthesia and Intensive Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Julia Abram
- Department of Anesthesia and Intensive Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Tom Barnes
- Faculty of Engineering and Science, University of Greenwich, London, United Kingdom
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Erratum: Flow-controlled ventilation maintains gas exchange and lung aeration in a pediatric model of healthy and injured lungs: A randomized cross-over experimental study. Front Pediatr 2023; 11:1177367. [PMID: 37009273 PMCID: PMC10064120 DOI: 10.3389/fped.2023.1177367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 03/01/2023] [Indexed: 04/04/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fped.2022.1005135.].
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Maj MA, Gehani TR, Immoos C, Medrano MS, Fanter RK, Strand CR, Glanz H, Piccolo BD, Abo-Ismail MK, La Frano MR, Manjarín R. Olive- and Coconut-Oil-Enriched Diets Decreased Secondary Bile Acids and Regulated Metabolic and Transcriptomic Markers of Brain Injury in the Frontal Cortexes of NAFLD Pigs. Brain Sci 2022; 12:1193. [PMID: 36138929 DOI: 10.3390/brainsci12091193] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 08/29/2022] [Accepted: 09/02/2022] [Indexed: 11/28/2022] Open
Abstract
The objective of this study was to investigate the effect of dietary fatty acid (FA) saturation and carbon chain length on brain bile acid (BA) metabolism and neuronal number in a pig model of pediatric NAFLD. Thirty 20-day-old Iberian pigs, pair-housed in pens, were randomly assigned to receive one of three hypercaloric diets for 10 weeks: (1) lard-enriched (LAR; n = 5 pens), (2) olive-oil-enriched (OLI, n = 5), and (3) coconut-oil-enriched (COC; n = 5). Pig behavior and activity were analyzed throughout the study. All animals were euthanized on week 10 and frontal cortex (FC) samples were collected for immunohistochemistry, metabolomic, and transcriptomic analyses. Data were analyzed by multivariate and univariate statistics. No differences were observed in relative brain weight, neuronal number, or cognitive functioning between diets. Pig activity and FC levels of neuroprotective secondary BAs and betaine decreased in the COC and OLI groups compared with LAR, and paralleled the severity of NAFLD. In addition, OLI-fed pigs showed downregulation of genes involved in neurotransmission, synaptic transmission, and nervous tissue development. Similarly, COC-fed pigs showed upregulation of neurogenesis and myelin repair genes, which caused the accumulation of medium-chain acylcarnitines in brain tissue. In conclusion, our results indicate that secondary BA levels in the FCs of NAFLD pigs are affected by dietary FA composition and are associated with metabolic and transcriptomic markers of brain injury. Dietary interventions that aim to replace saturated FAs by medium-chain or monounsaturated FAs in high-fat hypercaloric diets may have a negative effect on brain health in NAFLD patients.
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Manjarín R, Dillard K, Coffin M, Hernandez GV, Smith VA, Noland-Lidell T, Gehani TR, Smart HJ, Wheeler K, Sprayberry KA, Edwards MS, Fanter RK, Glanz H, Immoos C, Santiago-Rodriguez TM, Blank JM, Burrin DG, Piccolo BD, Abo-Ismail M, La Frano MR, Maj M. Dietary fat composition shapes bile acid metabolism and severity of liver injury in a pig model of pediatric NAFLD. Am J Physiol Endocrinol Metab 2022; 323:E187-E206. [PMID: 35858244 PMCID: PMC9423774 DOI: 10.1152/ajpendo.00052.2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 06/09/2022] [Accepted: 07/09/2022] [Indexed: 11/22/2022]
Abstract
The objective of this study was to investigate the effect of dietary fatty acid (FA) composition on bile acid (BA) metabolism in a pig model of NAFLD, by using a multiomics approach combined with histology and serum biochemistry. Thirty 20-day-old Iberian pigs pair-housed in pens were randomly assigned to receive 1 of 3 hypercaloric diets for 10 wk: 1) lard-enriched (LAR; n = 5 pens), 2) olive oil-enriched (OLI; n = 5), and 3) coconut oil-enriched (COC; n = 5). Animals were euthanized on week 10 after blood sampling, and liver, colon, and distal ileum (DI) were collected for histology, metabolomics, and transcriptomics. Data were analyzed by multivariate and univariate statistics. Compared with OLI and LAR, COC increased primary and secondary BAs in liver, plasma, and colon. In addition, both COC and OLI reduced circulating fibroblast growth factor 19, increased hepatic necrosis, composite lesion score, and liver enzymes in serum, and upregulated genes involved in hepatocyte proliferation and DNA repair. The severity of liver disease in COC and OLI pigs was associated with increased levels of phosphatidylcholines, medium-chain triacylglycerides, trimethylamine-N-oxide, and long-chain acylcarnitines in the liver, and the expression of profibrotic markers in DI, but not with changes in the composition or size of BA pool. In conclusion, our results indicate a role of dietary FAs in the regulation of BA metabolism and progression of NAFLD. Interventions that aim to modify the composition of dietary FAs, rather than to regulate BA metabolism or signaling, may be more effective in the treatment of NAFLD.NEW & NOTEWORTHY Bile acid homeostasis and signaling is disrupted in NAFLD and may play a central role in the development of the disease. However, there are no studies addressing the impact of diet on bile acid metabolism in patients with NAFLD. In juvenile Iberian pigs, we show that fatty acid composition in high-fat high-fructose diets affects BA levels in liver, plasma, and colon but these changes were not associated with the severity of the disease.
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Affiliation(s)
- Rodrigo Manjarín
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Kayla Dillard
- Department of Food Science and Nutrition, California Polytechnic State University, San Luis Obispo, California
| | - Morgan Coffin
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Gabriella V Hernandez
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Victoria A Smith
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Trista Noland-Lidell
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Tanvi R Gehani
- Department of Biomedical Engineering, California Polytechnic State University, San Luis Obispo, California
| | - Hayden J Smart
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Kevin Wheeler
- Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, California
| | - Kimberly A Sprayberry
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Mark S Edwards
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Rob K Fanter
- College of Agriculture, Food and Environmental Sciences, California Polytechnic State University, San Luis Obispo, California
- Center for Health Research, California Polytechnic State University, San Luis Obispo, California
| | - Hunter Glanz
- Department of Statistics, California Polytechnic State University, San Luis Obispo, California
| | - Chad Immoos
- Department of Chemistry and Biochemistry, California Polytechnic State University, San Luis Obispo, California
| | | | - Jason M Blank
- Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, California
| | - Douglas G Burrin
- USDA-ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Brian D Piccolo
- USDA-ARS Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Mohammed Abo-Ismail
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, California
| | - Michael R La Frano
- Department of Food Science and Nutrition, California Polytechnic State University, San Luis Obispo, California
- Cal Poly Metabolomics Service Center, California Polytechnic State University, San Luis Obispo, California
| | - Magdalena Maj
- Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, California
- Center for Applications in Biotechnology, California Polytechnic State University, San Luis Obispo, California
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Schranc Á, Balogh ÁL, Diaper J, Südy R, Peták F, Habre W, Albu G. Flow-controlled ventilation maintains gas exchange and lung aeration in a pediatric model of healthy and injured lungs: A randomized cross-over experimental study. Front Pediatr 2022; 10:1005135. [PMID: 36160799 PMCID: PMC9500311 DOI: 10.3389/fped.2022.1005135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 08/24/2022] [Indexed: 11/30/2022] Open
Abstract
Flow-controlled ventilation (FCV) is characterized by a constant flow to generate active inspiration and expiration. While the benefit of FCV on gas exchange has been demonstrated in preclinical and clinical studies with adults, the value of this modality for a pediatric population remains unknown. Thus, we aimed at observing the effects of FCV as compared to pressure-regulated volume control (PRVC) ventilation on lung mechanics, gas exchange and lung aeration before and after surfactant depletion in a pediatric model. Ten anesthetized piglets (10.4 ± 0.2 kg) were randomly assigned to start 1-h ventilation with FCV or PRVC before switching the ventilation modes for another hour. This sequence was repeated after inducing lung injury by bronchoalveolar lavage and injurious ventilation. The primary outcome was respiratory tissue elastance. Secondary outcomes included oxygenation index (PaO2/FiO2), PaCO2, intrapulmonary shunt (Qs/Qt), airway resistance, respiratory tissue damping, end-expiratory lung volume, lung clearance index and lung aeration by chest electrical impedance tomography. Measurements were performed at the end of each protocol stage. Ventilation modality had no effect on any respiratory mechanical parameter. Adequate gas exchange was provided by FCV, similar to PRVC, with sufficient CO2 elimination both in healthy and surfactant-depleted lungs (39.46 ± 7.2 mmHg and 46.2 ± 11.4 mmHg for FCV; 36.0 ± 4.1 and 39.5 ± 4.9 mmHg, for PRVC, respectively). Somewhat lower PaO2/FiO2 and higher Qs/Qt were observed in healthy and surfactant depleted lungs during FCV compared to PRVC (p < 0.05, for all). Compared to PRVC, lung aeration was significantly elevated, particularly in the ventral dependent zones during FCV (p < 0.05), but this difference was not evidenced in injured lungs. Somewhat lower oxygenation and higher shunt ratio was observed during FCV, nevertheless lung aeration improved and adequate gas exchange was ensured. Therefore, in the absence of major differences in respiratory mechanics and lung volumes, FCV may be considered as an alternative in ventilation therapy of pediatric patients with healthy and injured lungs.
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Affiliation(s)
- Álmos Schranc
- Unit for Anesthesiological Investigations, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University of Geneva, Geneva, Switzerland
| | - Ádám L Balogh
- Unit for Anesthesiological Investigations, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University of Geneva, Geneva, Switzerland
| | - John Diaper
- Unit for Anesthesiological Investigations, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University of Geneva, Geneva, Switzerland
| | - Roberta Südy
- Unit for Anesthesiological Investigations, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University of Geneva, Geneva, Switzerland
| | - Ferenc Peták
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - Walid Habre
- Unit for Anesthesiological Investigations, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University of Geneva, Geneva, Switzerland.,Pediatric Anesthesia Unit, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University Hospitals of Geneva, Geneva, Switzerland
| | - Gergely Albu
- Unit for Anesthesiological Investigations, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University of Geneva, Geneva, Switzerland.,Division of Anesthesiology, Department of Anesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University Hospitals of Geneva, Geneva, Switzerland
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Ramsammy CW, Galvin L, Joyce C, Leshabane G, Buckley J, Otwombe K, Liberty A, Violari A. Children's Positive and Negative Emotional Responses to an HIV Disclosure Study in South Africa. Front Pediatr 2022; 10:857336. [PMID: 35712628 PMCID: PMC9192950 DOI: 10.3389/fped.2022.857336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/03/2022] [Indexed: 11/13/2022] Open
Abstract
The benefits of HIV status disclosure to children is widely cited. However, few studies have reported how children respond to the process in a longitudinal fashion. This paper describes children's responses, as documented by healthcare providers (HCPs), during a longitudinal disclosure study conducted at Chris Hani Baragwanath Academic Hospital in Soweto, South Africa. Two HCPs facilitating disclosure recorded observations of 30 participating children (60% female), aged 7-13 years. Participants attended an average of six disclosure counseling sessions over 78 weeks. Observations documented by HCPs included the child's behavior and expressed emotions during the disclosure counseling sessions. The data was analyzed using content analysis. Mixed responses were observed in children who received full disclosure (27/30), with more children responding with strong negative emotions (16/27). However, 10 of those responded well to reassurance, and emotionally improved over subsequent sessions. Improvements were also observed in the communication and relationship between caregivers and children (17/30). Although most children understood the disclosure content (17/30), many were avoidant of the topic of HIV (16/30). With the understanding of the complex range of emotions elicited by HIV disclosure, we can better prepare HCPs on what to anticipate and train caregivers to further manage negative responses post-disclosure. This in turn may lead to more positive experiences of disclosure and the child's healthy acceptance of their HIV status.
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Affiliation(s)
- Candice W Ramsammy
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Lisa Galvin
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.,Department of Psychiatry, Faculty of Health Sciences, School of Clinical Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Celeste Joyce
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Given Leshabane
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Janice Buckley
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.,Department of Psychiatry, Faculty of Health Sciences, School of Clinical Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Kennedy Otwombe
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.,Faculty of Health Sciences, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa
| | - Afaaf Liberty
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Avy Violari
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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Korjamo T, Tolonen A, Ranta VP, Turpeinen M, Kokki H. Metabolism of oxycodone in human hepatocytes from different age groups and prediction of hepatic plasma clearance. Front Pharmacol 2012; 2:87. [PMID: 22291644 PMCID: PMC3251796 DOI: 10.3389/fphar.2011.00087] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 12/16/2011] [Indexed: 11/18/2022] Open
Abstract
Oxycodone is commonly used to treat severe pain in adults and children. It is extensively metabolized in the liver in adults, but the maturation of metabolism is not well understood. Our aim was to study the metabolism of oxycodone in cryopreserved human hepatocytes from different age groups (3 days, 2 and 5 months, 4 years, adult pool) and predict hepatic plasma clearance of oxycodone using these data. Oxycodone (0.1, 1, and 10 μM) was incubated with hepatocytes for 4 h, and 1 μM oxycodone also with CYP3A inhibitor ketoconazole (1 μM). Oxycodone and noroxycodone concentrations were determined at several time points with liquid chromatography-mass spectrometry. In vitro clearance of oxycodone was used to predict hepatic plasma clearance, using the well-stirred model and published physiological parameters. Noroxycodone was the major metabolite in all batches and ketoconazole inhibited the metabolism markedly in most cases. A clear correlation between in vitro oxycodone clearance and CYP3A4 activity was observed. The predicted hepatic plasma clearances were typically much lower than the published median total plasma clearance from pharmacokinetic studies. The data suggests that there are no children-specific metabolites of oxycodone. Moreover, CYP3A activity seems to be the major determinant in metabolic clearance of oxycodone regardless of age group or individual variability in hepatocyte batches.
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Affiliation(s)
| | | | - Veli-Pekka Ranta
- School of Pharmacy, University of Eastern FinlandKuopio, Finland
| | - Miia Turpeinen
- Department of Pharmacology and Toxicology, Institute of Biomedicine, University of OuluOulu, Finland
| | - Hannu Kokki
- Department Anaesthesiology, Kuopio University Hospital and School of Medicine, University of Eastern FinlandKuopio, Finland
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