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Nefzi M, Wahabi I, Hadj Fredj S, Othmani R, Dabboubi R, Boussetta K, Fanen P, Messaoud T. Association analysis of the surfactant protein-C gene to childhood asthma. J Asthma 2020; 59:1-11. [PMID: 32962475 DOI: 10.1080/02770903.2020.1827419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVES This study aims to describe the molecular variability in the SFTPC gene in a childhood chronic respiratory disease, asthma, in the Tunisian population and to identify the implications based on a case-control study of p.Thr138Asn (T138N) and p.Ser186Asn (S186N) variants. METHODS We used direct sequencing for the genotyping of the SFTPC gene within 101 asthmatic children. The study of T138N and S186N variants in 110 controls is conducted by the PCR-RFLP technique. RESULTS The molecular study revealed 26 variants including 24 intronic variations and 2 exonic variations (T138N and S186N) with respective frequencies of 16.8% and 18.3%. We conducted a case-control study of the two identified exonic variations. A different genotypic and allelic distribution between the two groups was noted. Only the T138N polymorphism showed a significant association with asthma disease (p < 1 0 -3). Statistical analysis elaborated four haplotypes with the following frequencies in patients vs controls: 138Thr-186Ser (79.5% vs 57.6%), 138Thr-186Asn (3.7% vs 7.8%), 138Asn-186Thr (2.2% vs 20.2%) and 138Asn-186Asn (14.6% vs 14.4%). A significant difference (p < 1 0 -3) was highlighted in haplotype distribution. The 138Asn-186Ser (OR [95%CI] = 0.14[0.04-0.54], p = 0.004, R2=0.93) and 138Thr-186Asn (OR [95%CI] = 0.35[0.12-0.54], p = 0.047, R2=0.88) haplotypes showed a negative association with asthma which may constitute a protective factor against the disease. CONCLUSION In Tunisia, this work constitutes the first report interested in the SFTPC gene and highlights the genetic variability of the SFTPC gene in asthma. Therefore, the case-controls analysis may be useful in the study of surfactant proteins dysfunction in chronic respiratory disease at an early age.
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Affiliation(s)
- Malek Nefzi
- Biochemistry Laboratory (LR00SP03), Children's Hospital, Tunis, Tunisia
| | - Imen Wahabi
- Biochemistry Laboratory (LR00SP03), Children's Hospital, Tunis, Tunisia
| | | | - Rym Othmani
- Biochemistry Laboratory (LR00SP03), Children's Hospital, Tunis, Tunisia
| | - Rym Dabboubi
- Biochemistry Laboratory (LR00SP03), Children's Hospital, Tunis, Tunisia
| | | | - Pascale Fanen
- Genetic Department, AP-HP, Henri Mondor Hospital, Creteil, France
| | - Taieb Messaoud
- Biochemistry Laboratory (LR00SP03), Children's Hospital, Tunis, Tunisia
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2
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Wu G, Li R, Tong C, He M, Qi Z, Chen H, Deng T, Liu H, Qi H. Non-invasive prenatal testing reveals copy number variations related to pregnancy complications. Mol Cytogenet 2019; 12:38. [PMID: 31485271 PMCID: PMC6716937 DOI: 10.1186/s13039-019-0451-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 08/21/2019] [Indexed: 12/25/2022] Open
Abstract
Background Pregnancy complications could lead to maternal and fetal morbidity and mortality. Early diagnosing and managing complications have been associated with good outcomes. The placenta was an important organ for development of pregnancy complications. Thus, non-invasive prenatal testing technologies could detect genetic variations, such as aneuploidies and sub-chromosomal copy number variations, reflecting defective placenta by maternal plasma cffDNAs. Maternal cffDNAs had been proved to derive from trophoblast cells of placenta. Results In order to find out the relationship between genetic variations and pregnancy complications, we reviewed NIPT results for subchromosomal copy number variations in a cohort of 3890 pregnancies without complications and 441 pregnancies with pregnancy complications including gestational diabetes mellitus (GDM), pregnancy-induced hypertension (PIH), preterm prelabor rupture of membranes (PPROM) and placenta implantation abnormalities (PIA). For GDMs, we identified three CNV regions containing some members of alpha- and beta-defensins, such as DEFA1, DEFA3, DEFB1. For PIHs, we found three duplication and one deletion region including Pcdhα, Pcdhβ, and Pcdhγ, known as protocadherins, which were complicated by hypertensive disorders. For PPROMs and PIAs, we identified one and two CNV regions, respectively. SFTPA2, SFTPD and SFTPA1, belonging to surfactant protein, was considered to moderated the inflammatory activation within the fetal extra-embryonic compartment, associated to duration of preterm prelabor rupture of fetal membranes, while MEF2C and TM6SF1 could be involved in trophoblast invasion and differentiation. Conclusions Our findings gave a clue to correlation between genetic variations of maternal cell-free DNAs and pregnancy complications. Electronic supplementary material The online version of this article (10.1186/s13039-019-0451-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Guangping Wu
- 1Department of Obstetrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 People's Republic of China.,2State Key Laboratory of Maternal and Fetal Medicine of Chongqing Municipality, Chongqing Medical University, Chongqing, 400016 People's Republic of China.,3International Collaborative Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016 People's Republic of China
| | - Rong Li
- 1Department of Obstetrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 People's Republic of China.,2State Key Laboratory of Maternal and Fetal Medicine of Chongqing Municipality, Chongqing Medical University, Chongqing, 400016 People's Republic of China.,3International Collaborative Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016 People's Republic of China
| | - Chao Tong
- 1Department of Obstetrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 People's Republic of China.,2State Key Laboratory of Maternal and Fetal Medicine of Chongqing Municipality, Chongqing Medical University, Chongqing, 400016 People's Republic of China.,3International Collaborative Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016 People's Republic of China
| | - Miaonan He
- Beijing CapitalBio Medical Laboratory, Beijing, 101111 China
| | - Zhiwei Qi
- Beijing CapitalBio Medical Laboratory, Beijing, 101111 China
| | - Huijuan Chen
- Beijing CapitalBio Medical Laboratory, Beijing, 101111 China
| | - Tao Deng
- Beijing CapitalBio Medical Laboratory, Beijing, 101111 China
| | - Hailiang Liu
- CapitalBio Technology Inc., Beijing, 101111 China.,6Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Hongbo Qi
- 1Department of Obstetrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 People's Republic of China.,2State Key Laboratory of Maternal and Fetal Medicine of Chongqing Municipality, Chongqing Medical University, Chongqing, 400016 People's Republic of China.,3International Collaborative Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016 People's Republic of China
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3
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Lin Z, Thorenoor N, Wu R, DiAngelo SL, Ye M, Thomas NJ, Liao X, Lin TR, Warren S, Floros J. Genetic Association of Pulmonary Surfactant Protein Genes, SFTPA1, SFTPA2, SFTPB, SFTPC, and SFTPD With Cystic Fibrosis. Front Immunol 2018; 9:2256. [PMID: 30333828 PMCID: PMC6175982 DOI: 10.3389/fimmu.2018.02256] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 09/11/2018] [Indexed: 01/03/2023] Open
Abstract
Surfactant proteins (SP) are involved in surfactant function and innate immunity in the human lung. Both lung function and innate immunity are altered in CF, and altered SP levels and genetic association are observed in Cystic Fibrosis (CF). We hypothesized that single nucleotide polymorphisms (SNPs) within the SP genes associate with CF or severity subgroups, either through single SNP or via SNP-SNP interactions between two SNPs of a given gene (intragenic) and/or between two genes (intergenic). We genotyped a total of 17 SP SNPs from 72 case-trio pedigree (SFTPA1 (5), SFTPA2 (4), SFTPB (4), SFTPC (2), and SFTPD (2)), and identified SP SNP associations by applying quantitative genetic principles. The results showed (a) Two SNPs, SFTPB rs7316 (p = 0.0083) and SFTPC rs1124 (p = 0.0154), each associated with CF. (b) Three intragenic SNP-SNP interactions, SFTPB (rs2077079, rs3024798), and SFTPA1 (rs1136451, rs1059057 and rs4253527), associated with CF. (c) A total of 34 intergenic SNP-SNP interactions among the 4 SP genes to be associated with CF. (d) No SNP-SNP interaction was observed between SFTPA1 or SFTPA2 and SFTPD. (e) Equal number of SNP-SNP interactions were observed between SFTPB and SFTPA1/SFTPA2 (n = 7) and SP-B and SFTPD (n = 7). (f) SFTPC exhibited significant SNP-SNP interactions with SFTPA1/SFTPA2 (n = 11), SFTPB (n = 4) and SFTPD (n = 3). (g) A single SFTPB SNP was associated with mild CF after Bonferroni correction, and several intergenic interactions that are associated (p < 0.01) with either mild or moderate/severe CF were observed. These collectively indicate that complex SNP-SNP interactions of the SP genes may contribute to the pulmonary disease in CF patients. We speculate that SPs may serve as modifiers for the varied progression of pulmonary disease in CF and/or its severity.
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Affiliation(s)
- Zhenwu Lin
- Department of Radiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, United States
| | - Nithyananda Thorenoor
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States
| | - Rongling Wu
- Public Health Science, College of Medicine, Pennsylvania State University, Hershey, PA, United States
| | - Susan L DiAngelo
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States
| | - Meixia Ye
- Public Health Science, College of Medicine, Pennsylvania State University, Hershey, PA, United States.,Center for Computational Biology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Neal J Thomas
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States
| | - Xiaojie Liao
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States
| | - Tony R Lin
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States
| | - Stuart Warren
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States
| | - Joanna Floros
- Department of Pediatrics, Center for Host Defense, Inflammation, and Lung Disease (CHILD) Research, Pennsylvania State University, Hershey, PA, United States.,Obstetrics and Gynecology, Pennsylvania State University College of Medicine, Hershey, PA, United States
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4
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Flodby P, Li C, Liu Y, Wang H, Marconett CN, Laird-Offringa IA, Minoo P, Lee AS, Zhou B. The 78-kD Glucose-Regulated Protein Regulates Endoplasmic Reticulum Homeostasis and Distal Epithelial Cell Survival during Lung Development. Am J Respir Cell Mol Biol 2017; 55:135-49. [PMID: 26816051 DOI: 10.1165/rcmb.2015-0327oc] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD), a chronic lung disease of prematurity, has been linked to endoplasmic reticulum (ER) stress. To investigate a causal role for ER stress in BPD pathogenesis, we generated conditional knockout (KO) mice (cGrp78(f/f)) with lung epithelial cell-specific KO of Grp78, a gene encoding the ER chaperone 78-kD glucose-regulated protein (GRP78), a master regulator of ER homeostasis and the unfolded protein response (UPR). Lung epithelial-specific Grp78 KO disrupted lung morphogenesis, causing developmental arrest, increased alveolar epithelial type II cell apoptosis, and decreased surfactant protein and type I cell marker expression in perinatal lungs. cGrp78(f/f) pups died immediately after birth, likely owing to respiratory distress. Importantly, Grp78 KO triggered UPR activation with marked induction of the proapoptotic transcription factor CCAAT/enhancer-binding proteins (C/EBP) homologous protein (CHOP). Increased expression of genes involved in oxidative stress and cell death and decreased expression of genes encoding antioxidant enzymes suggest a role for oxidative stress in alveolar epithelial cell (AEC) apoptosis. Increased Smad3 phosphorylation and expression of transforming growth factor-β/Smad3 targets Cdkn1a (encoding p21) and Gadd45a suggest that interactions among the apoptotic arm of the UPR, oxidative stress, and transforming growth factor-β/Smad signaling pathways contribute to Grp78 KO-induced AEC apoptosis and developmental arrest. Chemical chaperone Tauroursodeoxycholic acid reduced UPR activation and apoptosis in cGrp78(f/f) lungs cultured ex vivo, confirming a role for ER stress in observed AEC abnormalities. These results demonstrate a key role for GRP78 in AEC survival and gene expression during lung development through modulation of ER stress, and suggest the UPR as a potential therapeutic target in BPD.
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Affiliation(s)
- Per Flodby
- Departments of 1 Medicine, Will Rogers Institute Pulmonary Research Center, Division of Pulmonary, Critical Care and Sleep Medicine
| | | | - Yixin Liu
- Departments of 1 Medicine, Will Rogers Institute Pulmonary Research Center, Division of Pulmonary, Critical Care and Sleep Medicine
| | - Hongjun Wang
- Departments of 1 Medicine, Will Rogers Institute Pulmonary Research Center, Division of Pulmonary, Critical Care and Sleep Medicine
| | - Crystal N Marconett
- 3 Surgery, and.,4 Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, Los Angeles, California
| | - Ite A Laird-Offringa
- 3 Surgery, and.,5 Biochemistry and Molecular Biology, and.,4 Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, Los Angeles, California
| | | | - Amy S Lee
- 5 Biochemistry and Molecular Biology, and.,4 Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, Los Angeles, California
| | - Beiyun Zhou
- Departments of 1 Medicine, Will Rogers Institute Pulmonary Research Center, Division of Pulmonary, Critical Care and Sleep Medicine.,4 Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, Los Angeles, California
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5
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Campo I, Zorzetto M, Mariani F, Kadija Z, Morbini P, Dore R, Kaltenborn E, Frixel S, Zarbock R, Liebisch G, Hegermann J, Wrede C, Griese M, Luisetti M. A large kindred of pulmonary fibrosis associated with a novel ABCA3 gene variant. Respir Res 2014; 15:43. [PMID: 24730976 PMCID: PMC4021316 DOI: 10.1186/1465-9921-15-43] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 04/08/2014] [Indexed: 01/15/2023] Open
Abstract
Background Interstitial lung disease occurring in children is a condition characterized by high frequency of cases due to genetic aberrations of pulmonary surfactant homeostasis, that are also believed to be responsible of a fraction of familial pulmonary fibrosis. To our knowledge, ABCA3 gene was not previously reported as causative agent of fibrosis affecting both children and adults in the same kindred. Methods We investigated a large kindred in which two members, a girl whose interstitial lung disease was first recognized at age of 13, and an adult, showed a diffuse pulmonary fibrosis with marked differences in terms of morphology and imaging. An additional, asymptomatic family member was detected by genetic analysis. Surfactant abnormalities were investigated at biochemical, and genetic level, as well as by cell transfection experiments. Results Bronchoalveolar lavage fluid analysis of the patients revealed absence of surfactant protein C, whereas the gene sequence was normal. By contrast, sequence of the ABCA3 gene showed a novel homozygous G > A transition at nucleotide 2891, localized within exon 21, resulting in a glycine to aspartic acid change at codon 964. Interestingly, the lung specimens from the girl displayed a morphologic usual interstitial pneumonitis-like pattern, whereas the specimens from one of the two adult patients showed rather a non specific interstitial pneumonitis-like pattern. Conclusions We have detected a large kindred with a novel ABCA3 mutation likely causing interstitial lung fibrosis affecting either young and adult family members. We suggest that ABCA3 gene should be considered in genetic testing in the occurrence of familial pulmonary fibrosis.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Maurizio Luisetti
- Pneumology Unit, IRCCS San Matteo Foundation Hospital, Piazza Golgi 1, Pavia 27100, Italy.
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6
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LncRNA pathway involved in premature preterm rupture of membrane (PPROM): an epigenomic approach to study the pathogenesis of reproductive disorders. PLoS One 2013; 8:e79897. [PMID: 24312190 PMCID: PMC3842261 DOI: 10.1371/journal.pone.0079897] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 09/26/2013] [Indexed: 12/11/2022] Open
Abstract
Preterm birth (PTB) is a live birth delivered before 37 weeks of gestation (GW). About one-third of PTBs result from the preterm premature rupture of membranes (PPROM). Up to the present, the pathogenic mechanisms underlying PPROM are not clearly understood. Here, we investigated the differential expression of long chain non-coding RNAs (lncRNAs) in placentas of PTBs with PPROM, and their possible involvement in the pathogenic pathways leading to PPROM. A total number of 1954, 776, and 1050 lncRNAs were identified with a microarray from placentas of PPROM (group A), which were compared to full-term birth (FTB) (group B), PTB (group C), and premature rupture of membrane (PROM) (group D) at full-term, respectively. Instead of investigating the individual pathogenic role of each lncRNA involved in the molecular mechanism underlying PPROM, we have focused on investigating the metabolic pathways and their functions to explore what is the likely association and how they are possibly involved in the development of PPROM. Six groups, including up-regulation and down-regulation in the comparisons of A vs. B, A vs. C, and A vs. D, of pathways were analyzed. Our results showed that 22 pathways were characterized as up-regulated 7 down-regulated in A vs. C, 18 up-regulated and 15 down-regulated in A vs. D, and 33 up-regulated and 7 down-regulated in A vs. B. Functional analysis showed pathways of infection and inflammatory response, ECM-receptor interactions, apoptosis, actin cytoskeleton, and smooth muscle contraction are the major pathogenic mechanisms involved in the development of PPROM. Characterization of these pathways through identification of lncRNAs opened new avenues for further investigating the epigenomic mechanisms of lncRNAs in PPROM as well as PTB.
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7
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Favero CB, Henshaw RN, Grimsley-Myers CM, Shrestha A, Beier DR, Dwyer ND. Mutation of the BiP/GRP78 gene causes axon outgrowth and fasciculation defects in the thalamocortical connections of the mammalian forebrain. J Comp Neurol 2013; 521:677-96. [PMID: 22821687 PMCID: PMC3515720 DOI: 10.1002/cne.23199] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 05/13/2012] [Accepted: 07/13/2012] [Indexed: 02/05/2023]
Abstract
Proper development of axonal connections is essential for brain function. A forward genetic screen for mice with defects in thalamocortical development previously isolated a mutant called baffled. Here we describe the axonal defects of baffled in further detail and identify a point mutation in the Hspa5 gene, encoding the endoplasmic reticulum chaperone BiP/GRP78. This hypomorphic mutation of BiP disrupts proper development of the thalamocortical axon projection and other forebrain axon tracts, as well as cortical lamination. In baffled mutant brains, a reduced number of thalamic axons innervate the cortex by the time of birth. Thalamocortical and corticothalamic axons are delayed, overfasciculated, and disorganized along their pathway through the ventral telencephalon. Furthermore, dissociated mutant neurons show reduced axon extension in vitro. Together, these findings demonstrate a sensitive requirement for the endoplasmic reticulum chaperone BiP/GRP78 during axon outgrowth and pathfinding in the developing mammalian brain.
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Affiliation(s)
- Carlita B. Favero
- Department of Cell Biology, University of Virginia, Charlottesville, VA, 22908, USA
| | - Rasha N. Henshaw
- Department of Cell Biology, University of Virginia, Charlottesville, VA, 22908, USA
| | | | - Ayushma Shrestha
- Department of Cell Biology, University of Virginia, Charlottesville, VA, 22908, USA
| | - David R. Beier
- Division of Genetics, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Noelle D. Dwyer
- Department of Cell Biology, University of Virginia, Charlottesville, VA, 22908, USA
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8
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Surfactant protein D modulates levels of IL-10 and TNF-α in intrauterine compartments during lipopolysaccharide-induced preterm birth. Cytokine 2012; 60:423-30. [DOI: 10.1016/j.cyto.2012.07.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 07/13/2012] [Accepted: 07/14/2012] [Indexed: 11/18/2022]
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9
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Hallman M. Premature birth and diseases in premature infants: common genetic background? J Matern Fetal Neonatal Med 2012; 25 Suppl 1:21-4. [PMID: 22385349 DOI: 10.3109/14767058.2012.667600] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
It has been proposed that during human evolution, development of obligate bipedalism, narrow birth canal cross-sectional area and the large brain have forced an adjustment in duration of pregnancy (scaling of gestational age; Plunkett 2011). Children compared to other mammals are born with proportionally small brains (compared to adult brains), suggesting shortening of pregnancy duration during recent evolution. Prevalence of both obstructed delivery and premature birth is still exceptionally high. In near term infants, functional maturity and viability is high, and gene variants predisposing to respiratory distress syndrome (RDS) are rare. Advanced antenatal and neonatal treatment practices during the new era of medicine allowed survival of also very preterm infants (gestation <32 weeks). Genetic factors may play a major role in predisposing these infants to common pulmonary (bronchopulmonary dysplasia [BPD]; RDS) and intracerebral (intraventricular hemorrhage [IVH], cerebral palsy [CP]) diseases. Fetal genes also influence the susceptibility to preterm labor and premature birth. Specific genes associating with diseases in preterm infants may also contribute to the susceptibility to preterm birth. Understanding and applying the knowledge of genetic interactions in normal and abnormal perinatal-neonatal development requires large, well-structured population cohorts, studies involving the whole genome and international interdisciplinary collaboration.
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Affiliation(s)
- Mikko Hallman
- Clinical Institutes of Pediatrics and Obstetrics & Gynecology, Oulu University Hospital, Oulu, Finland.
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10
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Lau AN, Goodwin M, Kim CF, Weiss DJ. Stem cells and regenerative medicine in lung biology and diseases. Mol Ther 2012; 20:1116-30. [PMID: 22395528 DOI: 10.1038/mt.2012.37] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
A number of novel approaches for repair and regeneration of injured lung have developed over the past several years. These include a better understanding of endogenous stem and progenitor cells in the lung that can function in reparative capacity as well as extensive exploration of the potential efficacy of administering exogenous stem or progenitor cells to function in lung repair. Recent advances in ex vivo lung engineering have also been increasingly applied to the lung. The current status of these approaches as well as initial clinical trials of cell therapies for lung diseases are reviewed below.
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Affiliation(s)
- Allison N Lau
- Department of Genetics, Stem Cell Program, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts, USA
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11
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Surfactant protein A modulates the lipopolysaccharide-induced inflammatory response related to preterm birth. Cytokine 2011; 56:442-9. [PMID: 21865055 DOI: 10.1016/j.cyto.2011.07.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 07/07/2011] [Accepted: 07/25/2011] [Indexed: 11/20/2022]
Abstract
Surfactant protein A (SP-A) functions in homeostasis of lung surfactant and in innate immunity. SP-A is secreted by the fetal lung into amniotic fluid. Additionally it has been detected in gestational tissues. We propose that SP-A influences intrauterine inflammation that is commonly associated with preterm birth, the main underlying cause of neonatal mortality and morbidity. We used our previously established mouse model of LPS-induced preterm birth of live-born pups to investigate the role of SP-A in preterm birth. Mice overexpressing rat SP-A (rSP-A) under the control of human SP-C promoter were used. Cytokine concentrations in maternal and fetal serum and in amniotic fluid and mRNA levels of several inflammatory mediators in lungs and in intrauterine tissues were quantified using Cytometric Bead Array and RNase Protection Assay, respectively. Higher levels of SP-A mRNA were observed in fetal lungs and intrauterine tissues of rSP-A mice compared with wild-type. Using Western blot we detected excess of SP-A protein in fetal lung and in amniotic fluid of rSP-A animals. Despite some differences in the basal levels of TNF-α and IL-10 between rSP-A and wild-type animals, there were no differences in the duration of pregnancy. However, the levels of TNF-α, IL-10 and some other inflammatory mediators in intrauterine tissues and in amniotic fluid differed significantly between the mouse lines after maternal LPS given at 17dpc. We conclude that SP-A modulates the levels of intrauterine inflammatory mediators involved in preterm birth and may contribute to inflammatory processes related to spontaneous preterm labor.
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12
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Haataja R, Karjalainen MK, Luukkonen A, Teramo K, Puttonen H, Ojaniemi M, Varilo T, Chaudhari BP, Plunkett J, Murray JC, McCarroll SA, Peltonen L, Muglia LJ, Palotie A, Hallman M. Mapping a new spontaneous preterm birth susceptibility gene, IGF1R, using linkage, haplotype sharing, and association analysis. PLoS Genet 2011; 7:e1001293. [PMID: 21304894 PMCID: PMC3033387 DOI: 10.1371/journal.pgen.1001293] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Accepted: 01/05/2011] [Indexed: 11/19/2022] Open
Abstract
Preterm birth is the major cause of neonatal death and serious morbidity. Most preterm births are due to spontaneous onset of labor without a known cause or effective prevention. Both maternal and fetal genomes influence the predisposition to spontaneous preterm birth (SPTB), but the susceptibility loci remain to be defined. We utilized a combination of unique population structures, family-based linkage analysis, and subsequent case-control association to identify a susceptibility haplotype for SPTB. Clinically well-characterized SPTB families from northern Finland, a subisolate founded by a relatively small founder population that has subsequently experienced a number of bottlenecks, were selected for the initial discovery sample. Genome-wide linkage analysis using a high-density single-nucleotide polymorphism (SNP) array in seven large northern Finnish non-consanginous families identified a locus on 15q26.3 (HLOD 4.68). This region contains the IGF1R gene, which encodes the type 1 insulin-like growth factor receptor IGF-1R. Haplotype segregation analysis revealed that a 55 kb 12-SNP core segment within the IGF1R gene was shared identical-by-state (IBS) in five families. A follow-up case-control study in an independent sample representing the more general Finnish population showed an association of a 6-SNP IGF1R haplotype with SPTB in the fetuses, providing further evidence for IGF1R as a SPTB predisposition gene (frequency in cases versus controls 0.11 versus 0.05, P = 0.001, odds ratio 2.3). This study demonstrates the identification of a predisposing, low-frequency haplotype in a multifactorial trait using a well-characterized population and a combination of family and case-control designs. Our findings support the identification of the novel susceptibility gene IGF1R for predisposition by the fetal genome to being born preterm.
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Affiliation(s)
- Ritva Haataja
- Department of Pediatrics, Institute of Clinical Medicine, University of Oulu, Oulu, Finland
| | - Minna K. Karjalainen
- Department of Pediatrics, Institute of Clinical Medicine, University of Oulu, Oulu, Finland
- * E-mail:
| | - Aino Luukkonen
- Department of Pediatrics, Institute of Clinical Medicine, University of Oulu, Oulu, Finland
| | - Kari Teramo
- Department of Obstetrics and Gynecology, University Central Hospital, Helsinki, Finland
| | - Hilkka Puttonen
- Department of Obstetrics and Gynecology, University Central Hospital, Helsinki, Finland
| | - Marja Ojaniemi
- Department of Pediatrics, Institute of Clinical Medicine, University of Oulu, Oulu, Finland
| | - Teppo Varilo
- Department of Medical Genetics, Haartman Institute, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
- National Institute for Health and Welfare (THL), Helsinki, Finland
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Bimal P. Chaudhari
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Jevon Plunkett
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Human and Statistics Genetics Program, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Jeffrey C. Murray
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Steven A. McCarroll
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Leena Peltonen
- Department of Medical Genetics, Haartman Institute, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
- National Institute for Health and Welfare (THL), Helsinki, Finland
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
- The Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts, United States of America
- Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - Louis J. Muglia
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Aarno Palotie
- Department of Medical Genetics, Haartman Institute, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
- The Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, Massachusetts, United States of America
- Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - Mikko Hallman
- Department of Pediatrics, Institute of Clinical Medicine, University of Oulu, Oulu, Finland
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13
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Romero R, Friel LA, Velez Edwards DR, Kusanovic JP, Hassan SS, Mazaki-Tovi S, Vaisbuch E, Kim CJ, Erez O, Chaiworapongsa T, Pearce BD, Bartlett J, Salisbury BA, Anant MK, Vovis GF, Lee MS, Gomez R, Behnke E, Oyarzun E, Tromp G, Williams SM, Menon R. A genetic association study of maternal and fetal candidate genes that predispose to preterm prelabor rupture of membranes (PROM). Am J Obstet Gynecol 2010; 203:361.e1-361.e30. [PMID: 20673868 DOI: 10.1016/j.ajog.2010.05.026] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Revised: 04/10/2010] [Accepted: 05/18/2010] [Indexed: 01/19/2023]
Abstract
OBJECTIVE We sought to determine whether maternal/fetal single-nucleotide polymorphisms (SNPs) in candidate genes are associated with preterm prelabor rupture of membranes (pPROM). STUDY DESIGN A case-control study was conducted in patients with pPROM (225 mothers and 155 fetuses) and 599 mothers and 628 fetuses with a normal pregnancy; 190 candidate genes and 775 SNPs were studied. Single locus/haplotype association analyses were performed; false discovery rate was used to correct for multiple testing (q* = 0.15). RESULTS First, a SNP in tissue inhibitor of metalloproteinase 2 in mothers was significantly associated with pPROM (odds ratio, 2.12; 95% confidence interval, 1.47-3.07; P = .000068), and this association remained significant after correction for multiple comparisons. Second, haplotypes for Alpha 3 type IV collagen isoform precursor in the mother were associated with pPROM (global P = .003). Third, multilocus analysis identified a 3-locus model, which included maternal SNPs in collagen type I alpha 2, defensin alpha 5 gene, and endothelin 1. CONCLUSION DNA variants in a maternal gene involved in extracellular matrix metabolism doubled the risk of pPROM.
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Affiliation(s)
- Roberto Romero
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development/National Institutes of Health/Department of Health and Human Services, Bethesda, MD, USA.
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