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Orlandi L, Rodriguez Y, Leostic A, Giraud C, Lang ML, Vialard F, Mauffré V, Motte-Signoret E. Preterm birth affects both surfactant synthesis and lung liquid resorption actors in fetal sheep. Dev Biol 2024; 506:64-71. [PMID: 38081502 DOI: 10.1016/j.ydbio.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/22/2023] [Accepted: 12/05/2023] [Indexed: 12/18/2023]
Abstract
INTRODUCTION After birth, the lungs must resorb the fluid they contain. This process involves multiple actors such as surfactant, aquaporins and ENaC channels. Preterm newborns often exhibit respiratory distress syndrome due to surfactant deficiency, and transitory tachypnea caused by a delay in lung liquid resorption. Our hypothesis is that surfactant, ENaC and aquaporins are involved in respiratory transition to extrauterine life and altered by preterm birth. We compared these candidates in preterm and term fetal sheeps. MATERIALS AND METHODS We performed cesarean sections in 8 time-dated pregnant ewes (4 at 100 days and 4 at 140 days of gestation, corresponding to 24 and 36 weeks of gestation in humans), and obtained 13 fetal sheeps in each group. We studied surfactant synthesis (SP-A, SP-B, SP-C), lung liquid resorption (ENaC, aquaporins) and corticosteroid regulation (glucocorticoid receptor, mineralocorticoid receptor and 11-betaHSD2) at mRNA and protein levels. RESULTS The mRNA expression level of SFTPA, SFTPB and SFTPC was higher in the term group. These results were confirmed at the protein level for SP-B on Western Blot analysis and for SP-A, SP-B and SP-C on immunohistochemical analysis. Regarding aquaporins, ENaC and receptors, mRNA expression levels for AQP1, AQP3, AQP5, ENaCα, ENaCβ, ENaCγ and 11βHSD2 mRNA were also higher in the term group. DISCUSSION Expression of surfactant proteins, aquaporins and ENaC increases between 100 and 140 days of gestation in an ovine model. Further exploring these pathways and their hormonal regulation could highlight some new explanations in the pathophysiology of neonatal respiratory diseases.
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Affiliation(s)
- Leona Orlandi
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France
| | - Yoann Rodriguez
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France
| | - Anne Leostic
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Poissy St Germain Hospital, Obstetrics and Gynaecology, Poissy, France
| | - Corinne Giraud
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France
| | - Maya-Laure Lang
- Poissy St Germain Hospital, Neonatal Intensive Care Unit, Poissy, France
| | - François Vialard
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Poissy St Germain Hospital, Genetics, Poissy, France
| | - Vincent Mauffré
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Ecole Nationale Vétérinaire d'Alfort, BREED, 94700, Maisons-Alfort, France
| | - Emmanuelle Motte-Signoret
- Paris-Saclay University, UVSQ, UFR-SVS, UMR1198-BREED-RHuMA, 2 avenue de la source de la Bièvre, 78180, Montigny le Bretonneux, France; Poissy St Germain Hospital, Neonatal Intensive Care Unit, Poissy, France.
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Carvajal CA, Campino C, Martinez-Aguayo A, Tichauer JE, Bancalari R, Valdivia C, Trejo P, Aglony M, Baudrand R, Lagos CF, Mellado C, Garcia H, Fardella CE. A New Presentation of the Chimeric CYP11B1/CYP11B2 Gene With Low Prevalence of Primary Aldosteronism and Atypical Gene Segregation Pattern. Hypertension 2012; 59:85-91. [DOI: 10.1161/hypertensionaha.111.180513] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Familial hyperaldosteronism type I is caused by an unequal crossover of 11β-hydroxylase (CYP11B1) and aldosterone synthase (CYP11B2) genes, giving rise to a chimeric CYP11B1/CYP11B2 gene (CG). We describe a family carrying a CG with high levels of free 18-hydroxycortisol but low prevalence of primary aldosteronism (PA) and an atypical CG inheritance pattern in a family of 4 generations with 16 adults and 13 children, we measured the arterial blood pressure, serum aldosterone, and plasma renin activity and then calculated the serum aldosterone:plasma renin activity ratio and urinary free 18-hydroxycortisol. We identified the CG by long-extension PCR and predicted its inheritance pattern. The CG was found in 24 of 29 subjects (10 children and 14 adults). In CG+ patients, hypertension and high 18-hydroxycortisol were prevalent (83% and 100%, respectively). High serum aldosterone:plasma renin activity ratio was more frequent in pediatric than adult patients (80% versus 36%;
P
<0.001). An inverse association between serum aldosterone:plasma renin activity ratio and age was observed (
r
=−0.48;
P
=0.018). Sequence analysis identified the CYP11B1/CYP11B2 crossover in a 50-bp region spanning intron 3 of CYP11B1 and exon 4 of CYP11B2. The CG segregation differs from an autosomal disease, showing 100% of CG penetrance in generations II and III. Statistical analysis suggests that inheritance pattern was not attributed to random segregation (
P
<0.001). In conclusion, we describe a family with an atypical CYP11B1/CYP11B2 gene inheritance pattern and variable phenotypic expression, where the majority of pediatric patients have primary aldosteronism. Most adults have normal aldosterone and renin levels, which could mask them as essential hypertensives.
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Affiliation(s)
- Cristian A. Carvajal
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Carmen Campino
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Alejandro Martinez-Aguayo
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Juan E. Tichauer
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Rodrigo Bancalari
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Carolina Valdivia
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Pamela Trejo
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Marlene Aglony
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - René Baudrand
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Carlos F. Lagos
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Cecilia Mellado
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Hernán Garcia
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
| | - Carlos E. Fardella
- From the Department of Endocrinology (C.A.C., C.C., J.E.T., C.V., P.T., R.B., C.F.L., C.E.F.), Division of Pediatrics (A.M.-A., R.B., M.A., C.M., H.G.), Faculty of Medicine, and Department of Pharmacy, Faculty of Chemistry (C.F.L.), Pontificia Universidad Católica de Chile, Santiago, Chile; Millennium Institute of Immunology and Immunotherapy (C.A.C., C.C., R.B., C.E.F.), Santiago, Chile
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