1
|
M N N, J K, S R S, Raavi V. The Role of Insulin-like Growth Factor-Axis and Mitotic Index in South Indian Neonates with Small for Gestational Age. Fetal Pediatr Pathol 2023; 42:216-226. [PMID: 35712880 DOI: 10.1080/15513815.2022.2086950] [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] [Indexed: 11/04/2022]
Abstract
OBJECTIVE IGF-axis and mitotic capacity of cells play a vital role in fetal growth. We compared IGF1, IGF2, and IGFBP3 protein levels, mitotic indices, IGFR1 and IGFR2 mRNA expression in appropriate for gestational age (AGA) and small for gestational age (SGA) neonates of Indian women. METHODS Cord blood (n = 80) and placental samples (n = 40) were collected from AGA and SGA neonates. Plasma IGF1, IGF2, and IGFBP3 proteins were measured by ELISA. IGFR1 and IGFR2 mRNA expression in the placenta were analyzed by qRT-PCR. Cord blood was cultured in vitro and mitotic index was obtained. RESULTS IGF1 (p = 1), and IGF2 (p = 0.69) protein levels did not differ, whereas IGFBP3 (p = 0.02) was significantly less in SGA compared to AGA neonates. Down-regulation of IGFR1 (3.9-folds) and IGFR2 (2.8-folds) mRNA and reduced mitotic index of lymphocytes was observed in SGA (p = 0.001) compared to AGA neonates. CONCLUSION Our results showed that, SGA neonates displayed down-regulated IGFR1 and IGFR2 mRNA, decreased IGFBP3 protein and mitotic index.
Collapse
Affiliation(s)
- Nithya M N
- Department of Cell Biology and Molecular Genetics, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar 563 103, Karnataka, India
| | - Krishnappa J
- Department of Paediatrics, Sri Devaraj Urs Medical College, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar 563 103, Karnataka, India
| | - Sheela S R
- Department of Obstetrics and Gynaecology, Sri Devaraj Urs Medical College, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar 563 103, Karnataka, India
| | - Venkateswarlu Raavi
- Department of Cell Biology and Molecular Genetics, Sri Devaraj Urs Academy of Higher Education and Research (Deemed to be University), Kolar 563 103, Karnataka, India
| |
Collapse
|
2
|
Shalitin S, Gat-Yablonski G. Associations of Obesity with Linear Growth and Puberty. Horm Res Paediatr 2022; 95:120-136. [PMID: 34130293 DOI: 10.1159/000516171] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 03/27/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The prevalence of obesity in childhood has increased dramatically in recent decades with increased risk of developing cardiometabolic and other comorbidities. Childhood adiposity may also influence processes of growth and puberty. SUMMARY Growth patterns of obesity during childhood have been shown to be associated with increased linear growth in early childhood, leading to accelerated epiphyseal growth plate (EGP) maturation. Several hormones secreted by the adipose tissue may affect linear growth in the context of obesity, both via the growth hormone IGF-1 axis and via a direct effect on the EGP. The observation that children with obesity tend to mature earlier than lean children has led to the assumption that the degree of body fatness may trigger the neuroendocrine events that lead to pubertal onset. The most probable link between obesity and puberty is leptin and its interaction with the kisspeptin system, which is an important regulator of puberty. However, peripheral action of adipose tissue could also be involved in changes in the onset of puberty. In addition, nutritional factors, epigenetics, and endocrine-disrupting chemicals are potential mediators linking pubertal onset to obesity. In this review, we focused on interactions of obesity with linear growth and pubertal processes, based on basic research and clinical data in humans. KEY MESSAGE Children with obesity are subject to accelerated linear growth with risk of impaired adult height and early puberty, with its psychological consequences. The data highlight another important objective in combatting childhood obesity, for the prevention of abnormal growth and pubertal patterns.
Collapse
Affiliation(s)
- Shlomit Shalitin
- National Center for Childhood Diabetes, Schneider Children's Medical Center of Israel, The Jesse Z and Sara Lea Shafer Institute for Endocrinology and Diabetes, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Galia Gat-Yablonski
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Felsenstein Medical Research Center, Petach Tikva, Israel
| |
Collapse
|
3
|
Takai H, Kondoh E, Mogami H, Kawasaki K, Chigusa Y, Sato M, Kawamura Y, Murakami R, Matsumura N, Konishi I, Mandai M. Placental sonic hedgehog pathway regulates foetal growth via insulin-like growth factor axis in preeclampsia. J Clin Endocrinol Metab 2019; 104:4239-4252. [PMID: 31120491 DOI: 10.1210/jc.2019-00335] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 05/17/2019] [Indexed: 01/25/2023]
Abstract
BACKGROUND Placental dysfunction is the underlying cause of common major disorders of pregnancy, such as foetal growth restriction (FGR) and preeclampsia. However, the mechanisms of placental dysfunction are not entirely elucidated. We previously reported 10 reliable preeclampsia pathways based on multiple microarray data sets, among which was the sonic hedgehog (SHH) pathway. Here we describe the significant role of SHH signalling involved in placental development and foetal growth. METHODS The placental expression levels of surrogate markers of the SHH pathway, patched homolog 1 (PTCH1) and glioma-associated oncogene homolog 2 (GLI2), were evaluated using quantitative real-time polymerase chain reaction (qPCR), western blot analysis and immunohistochemistry. We investigated the underlying mechanisms of the SHH pathway in trophoblast syncytialization, a critical process for placental development and maturation, using primary cytotrophoblasts. Moreover, the potential roles of placental SHH signalling in the regulation of the insulin-like growth factor (IGF) axis were explored by pathway analysis of microarray data. Finally, the influence of SHH signalling on foetal growth was examined by placental administration of cyclopamine, an SHH pathway inhibitor, to pregnant mice. RESULTS The SHH pathway was downregulated in preeclampsia placentas and its activation was highly correlated with birth weight. Trophoblast syncytialization was modulated by non-canonical SHH-adenylate cyclase (ADCY) signalling rather than canonical SHH-GLI signalling. The IGF1R pathway was regulated by both non-canonical SHH-ADCY signalling and canonical SHH-GLI signalling. Inhibition of placental SHH signalling significantly reduced foetal weight in mice. CONCLUSION Placental development and foetal growth were regulated through the SHH pathway via the IGF axis.
Collapse
Affiliation(s)
- Hiroshi Takai
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Eiji Kondoh
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Haruta Mogami
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Kaoru Kawasaki
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | | | - Mai Sato
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Yosuke Kawamura
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Ryusuke Murakami
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Noriomi Matsumura
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| | - Ikuo Konishi
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
- National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Masaki Mandai
- Department of Obstetrics and Gynecology, Kyoto University, Kyoto, Japan
| |
Collapse
|
4
|
Lv Y, Lv M, Ji X, Xue L, Rui C, Yin L, Ding H, Miao Z. Down-regulated expressed protein HMGB3 inhibits proliferation and migration, promotes apoptosis in the placentas of fetal growth restriction. Int J Biochem Cell Biol 2018; 107:69-76. [PMID: 30543931 DOI: 10.1016/j.biocel.2018.11.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/01/2018] [Accepted: 11/12/2018] [Indexed: 12/26/2022]
Abstract
Fetal growth restriction (FGR) is one of the major complications of pregnancy, which can lead to serious short-term and long-term diseases. High-mobility group box 3 (HMGB3) has been found to contribute to the development of many cancers. However, the role of HMGB3 in the pathogenesis of FGR is blank. Here, we measured the expression level of HMGB3 in the placenta tissues of six normal pregnancies and five FGR patients by western blotting and quantitative real-time polymerase chain reaction (qRT-PCR). CCK8 assay, transwell assay and flow cytometry were used to detect the functional effects of overexpression and silencing of HMGB3 on the HTR8/SVneo trophoblast cell line. The results showed that the protein levels of HMGB3 were significantly decreased in FGR placentas compared to normal controls, while mRNA levels of HMGB3 were not significantly altered. Furthermore, when overexpressed of protein HMGB3 of the trophoblast cells, the proliferation and migration abilities were significantly promoted, and the apoptosis abilities of these cells were statistically inhibited. Cell functional experiments showed the opposite results when the expression of HMGB3 was silent. And the expression of cell function-related genes PCNA, Ki67, Tp53, Bax, MMP-2 and E-cadherin was observed to show corresponding changes by qRT-PCR. The results of mass spectrometry showed that HMGB3 may directly or indirectly interact with 71 proteins. In summary, our results indicated that HMGB3 might be of very great significance to the pathogenesis of FGR and might play the role by leading the dysfunction of placental villous trophoblast cells and through the interaction with some other proteins.
Collapse
Affiliation(s)
- Yan Lv
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Mingming Lv
- Department of Breast, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China; Nanjing Maternal and Child Health Institute, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Xiaohong Ji
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Lu Xue
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Can Rui
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Lingfeng Yin
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China
| | - Hongjuan Ding
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China.
| | - Zhijing Miao
- Department of Obstetrics and Gynecology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, 210004, China.
| |
Collapse
|
5
|
Shang M, Wen Z. Increased placental IGF-1/mTOR activity in macrosomia born to women with gestational diabetes. Diabetes Res Clin Pract 2018; 146:211-219. [PMID: 30389621 DOI: 10.1016/j.diabres.2018.10.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/11/2018] [Accepted: 10/23/2018] [Indexed: 01/08/2023]
Abstract
AIMS Newborns of women with gestational diabetes mellitus (GDM) are susceptible to be macrosomic, even if the blood glucose levels are in normal ranges. The underlying mechanisms are largely unknown. We tested the hypothesis that placental insulin like growth factor(IGF)-I and mammalian target of rapamycin (mTOR) signaling is activated and amino acid transporter expression is increased in women with GDM who give birth to macrosomic babies. METHODS 50 Chinese pregnant women with GDM whose blood glucose levels were controlled within normal range were recruited and their placental tissues were collected. 23 women gave birth to macrosomia and 27 women gave birth to babies with normal birth weight. We determined the phosphorylation of key signaling molecules (including Akt, IRS-1, S6K1, 4E-BP-1, and AMPKα) in the placental IGF-I and mTOR signaling pathways. We also measured the protein expression of the amino acid transporter systems A in placenta. RESULTS Birth weights (range 2500-4400 g) were positively correlated to maternal IGF-1 (P < 0.05). The activity of placental IGF-I and mTOR signaling was positively correlated (P < 0.05), whereas AMPKα phosphorylation was inversely (P < 0.05) correlated to birth weight. Protein expression of the system A isoform sodium-dependent neutral amino acid transporter (SNAT) 1 were positively correlated to birth weight (P < 0.05). CONCLUSIONS Up-regulation of placental amino acid transporters may contribute to more macrosomic babies in women with GDM. Activation of IGF-I and mTOR signaling pathways might involve in this effect.
Collapse
Affiliation(s)
- Min Shang
- Department of Obstetrics and Gynecology, Beijing Friendship Hospital, Capital Medical University, China.
| | - Zhaoyang Wen
- Medical Biology Laboratory of the Experimental Teaching Center, Capital Medical University, China
| |
Collapse
|
6
|
Le Stunff C, Castell AL, Todd N, Mille C, Belot MP, Frament N, Brailly-Tabard S, Benachi A, Fradin D, Bougnères P. Fetal growth is associated with CpG methylation in the P2 promoter of the IGF1 gene. Clin Epigenetics 2018; 10:57. [PMID: 29713392 PMCID: PMC5909239 DOI: 10.1186/s13148-018-0489-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 04/04/2018] [Indexed: 12/31/2022] Open
Abstract
Background There are many reasons to think that epigenetics is a key determinant of fetal growth variability across the normal population. Since IGF1 and INS genes are major determinants of intrauterine growth, we examined the methylation of selected CpGs located in the regulatory region of these two genes. Methods Cord blood was sampled in 159 newborns born to mothers prospectively followed during their pregnancy. A 142-item questionnaire was filled by mothers at inclusion, during the last trimester of the pregnancy and at the delivery. The methylation of selected CpGs located in the promoters of the IGF1 and INS genes was measured in cord blood mononuclear cells collected at birth using bisulfite-PCR-pyrosequencing. Results Methylation at IGF1 CpG-137 correlated negatively with birth length (r = 0.27, P = 3.5 × 10−4). The same effect size was found after adjustment for maternal age, parity, and smoking: a 10% increase in CpG-137 methylation was associated with a decrease of length by 0.23 SDS. Conclusion The current results suggest that the methylation of IGF1 CpG-137 contributes to the individual variation of fetal growth by regulating IGF1 expression in fetal tissues. Electronic supplementary material The online version of this article (10.1186/s13148-018-0489-9) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Catherine Le Stunff
- 1Institut National de la Santé et de la Recherche Médicale U1169, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Anne-Laure Castell
- 2Service de Médecine des Adolescents, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Nicolas Todd
- 1Institut National de la Santé et de la Recherche Médicale U1169, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Clémence Mille
- 1Institut National de la Santé et de la Recherche Médicale U1169, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Marie-Pierre Belot
- 1Institut National de la Santé et de la Recherche Médicale U1169, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Nathalie Frament
- 1Institut National de la Santé et de la Recherche Médicale U1169, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Sylvie Brailly-Tabard
- 3Service de BiologieMoléculaire et Hormonologie, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| | - Alexandra Benachi
- 4Service de Gynécologie-Obstétrique, Antoine Béclère Hospital, Paris Sud University, Clamart, France
| | | | - Pierre Bougnères
- 1Institut National de la Santé et de la Recherche Médicale U1169, Bicêtre Hospital, Paris Sud University, Le Kremlin-Bicêtre, France
| |
Collapse
|
7
|
Hawkes CP, Murray DM, Kenny LC, Kiely M, Hourihane JO, Irvine AD, Wu Z, Argon Y, Reitz RE, McPhaul MJ, Grimberg A. Correlation of Insulin-Like Growth Factor-I and -II Concentrations at Birth Measured by Mass Spectrometry and Growth from Birth to Two Months. Horm Res Paediatr 2018; 89:122-131. [PMID: 29402777 PMCID: PMC7183787 DOI: 10.1159/000486035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 12/05/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Immunoassays used to measure insulin-like growth factor (IGF)-I and -II concentrations are susceptible to interference from IGF-binding proteins. The aim of this study was to investigate the association of IGF-I and -II concentrations at birth with neonatal anthropometry using a liquid chromatography/mass spectrometry (LCMS) assay. METHODS LCMS was used to measure IGF-I and -II concentrations in umbilical cord blood of term, healthy infants enrolled in the Cork BASELINE Birth Cohort Study. Weight, length, and occipitofrontal head circumference (OFC) were measured at birth and 2 months. RESULTS Cord blood IGF-I and -II concentrations were measured in 1,100 infants. Mean (SD) IGF-I and -II concentrations were 52.5 (23.9) ng/mL and 424.3 (98.2) ng/mL, respectively. IGF-I and -II concentrations at birth were associated (p < 0.05) with weight (R2 = 0.19, R2 = 0.01), length (R2 = 0.07, R2 = 0.004), and OFC (R2 = 0.03, R2 = 0.04) at birth. Low IGF-I concentrations at birth were associated with increases in weight (p < 0.001) and OFC (p < 0.01) Z-scores in the first 2 months. CONCLUSION Using an LCMS assay, we have shown that anthropometric parameters at birth are associated with IGF-I and weakly with IGF-II concentrations. This indicates that, at the time of birth, IGF-I is the more important growth factor for regulating infant growth.
Collapse
Affiliation(s)
- Colin P. Hawkes
- Division of Endocrinology and Diabetes, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA;,The National Children’s Research Centre, Dublin, Ireland;,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
| | - Deirdre M. Murray
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland;,The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland
| | - Louise C. Kenny
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland;,Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
| | - Mairead Kiely
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland;,School of Food and Nutritional Science, University College Cork, Cork, Ireland
| | - Jonathan O’B Hourihane
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland;,The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland
| | - Alan D. Irvine
- The National Children’s Research Centre, Dublin, Ireland;,Department of Clinical Medicine, Trinity College Dublin, Dublin, Ireland
| | - Zengru Wu
- Quest Diagnostics Nichols Institute, San Juan Capistrano, CA, USA
| | - Yair Argon
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Richard E. Reitz
- Quest Diagnostics Nichols Institute, San Juan Capistrano, CA, USA
| | | | - Adda Grimberg
- Division of Endocrinology and Diabetes, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA;,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
8
|
Iñiguez G, Gallardo P, Castro JJ, Gonzalez R, Garcia M, Kakarieka E, San Martin S, Johnson MC, Mericq V, Cassorla F. Klotho Gene and Protein in Human Placentas According to Birth Weight and Gestational Age. Front Endocrinol (Lausanne) 2018; 9:797. [PMID: 30697189 PMCID: PMC6340928 DOI: 10.3389/fendo.2018.00797] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 12/19/2018] [Indexed: 01/02/2023] Open
Abstract
Introduction: Fetal growth restriction may be the consequence of maternal, fetal, or placental factors. The insulin-like growth factors (IGFs) are major determinants of fetal growth, and are expressed in the mother, fetus and placenta in most species. Previously we reported higher placental protein content of IGF-I, IGF-IR, and AKT in small (SGA) compared with those from appropriate for gestational age (AGA) placentas. The protein Klotho, has been reported in placenta and may regulate IGF-I activity. In this study we determined Klotho gene expression and protein immunostaining in term (T-SGA y T-AGA) and preterm (PT-SGA y PT-AGA) human placentas. In addition, we assessed the effect of Klotho on the IGF-IR and AKT activation induced by IGF-I. Methods: Placentas (n = 1 17) from 32 T-SGA (birth weight (BW) = -1.74 ± 0.08 SDS), 37 T-AGA (BW = 0.12 ± 0.12 SDS), 20 PT-SGA (BW = -2.08 ± 0.14 SDS), and 28 PT-AGA (BW = -0.43 ± 0.13 SDS) newborns were collected. mRNA expression by RT-PCR in the chorionic (CP) and basal (BP) plates of the placentas, and the presence of Klotho was evaluated by immunohistochemistry (integral optical density, IOD). In addition, we developed placental explants that were incubated with IGF-I in the presence or absence of Klotho. Results: We found a lower mRNA expression and protein immunoreactivity of Klotho in the CP of SGA (term and preterm) compared with AGA placentas. We also observed a significant reduction in IGF-IR tyrosine activation induced by IGF-I 10 nM when preincubated with 2.0 nM of Klotho (2.4 ± 0.5 arbitrary units vs. 1.3 ± 0.3 AU), and similar results we observed on AKT and ERK42/44 activation. Conclusion: We describe for the first time that Klotho mRNA and protein varies according to fetal growth and gestational age. In addition, Klotho appears to down-regulate the activation induced by IGF-I on IGF-IR and AKT, suggesting that Klotho may be regulating IGF-I activity in human placentas according to intrauterine fetal growth.
Collapse
Affiliation(s)
- Germán Iñiguez
- School of Medicine, Maternal and Child Research Institute (IDIMI), University of Chile, Santiago, Chile
- *Correspondence: Germán Iñiguez
| | - Pedro Gallardo
- School of Medicine, Maternal and Child Research Institute (IDIMI), University of Chile, Santiago, Chile
| | - Juan Jose Castro
- School of Medicine, Maternal and Child Research Institute (IDIMI), University of Chile, Santiago, Chile
| | - Rene Gonzalez
- Biomedical Research Centre, School of Medicine, University of Valparaíso, Valparaíso, Chile
| | - Mirna Garcia
- Neonatology Unit, San Borja Arriarán Clinical Hospital, Santiago, Chile
| | - Elena Kakarieka
- Pathology Unit, San Borja Arriarán Clinical Hospital, Santiago, Chile
| | - Sebastian San Martin
- Biomedical Research Centre, School of Medicine, University of Valparaíso, Valparaíso, Chile
| | - Maria Cecilia Johnson
- School of Medicine, Maternal and Child Research Institute (IDIMI), University of Chile, Santiago, Chile
| | - Verónica Mericq
- School of Medicine, Maternal and Child Research Institute (IDIMI), University of Chile, Santiago, Chile
| | - Fernando Cassorla
- School of Medicine, Maternal and Child Research Institute (IDIMI), University of Chile, Santiago, Chile
| |
Collapse
|
9
|
Fujimoto M, Sonoyama YK, Fukushima K, Imamoto A, Miyahara F, Miyahara N, Nishimura R, Yamada Y, Miura M, Adachi K, Nanba E, Hanaki K, Kanzaki S. Increased IRS2 mRNA Expression in SGA Neonates: PCR Analysis of Insulin/IGF Signaling in Cord Blood. J Endocr Soc 2017; 1:1408-1416. [PMID: 29264464 PMCID: PMC5695653 DOI: 10.1210/js.2017-00294] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/29/2017] [Indexed: 12/28/2022] Open
Abstract
Context: Hypoglycemia is the most common metabolic problem among small-for-gestational-age (SGA) neonates. However, the pathological mechanism and insulin/ insulin-like growth factor (IGF) signaling axis in neonates remain unknown. Objective: To determine the insulin/IGF axis in neonates, we analyzed the messenger RNA (mRNA) expression of insulin/IGF signaling in fetal umbilical cord blood. Setting: The Perinatal Medical Center of Tottori University Hospital. Participants: Fifty-two [42 appropriate-for-gestational-age (AGA) and 10 SGA] neonates. Interventions: Immediately collected cord blood was placed into a PAXgene Blood RNA Tube. Total RNA from the blood was purified using reagents provided in the PAXgene Blood RNA Kit within 4 days, and reverse transcription polymerase chain reaction (PCR) was performed. Main Outcome Measure: Quantitative real-time PCR analysis was applied to evaluate the mRNA expression of insulin receptor (INSR), IGF-I receptor (IGF1R), insulin receptor substrate 1 (IRS1), IRS2, and glucose transporters (SLC2A2 and SLC2A4). β-Actin was used as a control gene. Results: Serum glucose and IGF-I levels in SGA neonates were significantly lower. The cord serum insulin levels were similar between AGA and SGA neonates. The IRS2 mRNA expression was significantly higher in SGA than in AGA neonates (P < 0.05). The IRS2 mRNA expression was significantly higher in hypoglycemic SGA neonates than in normoglycemic SGA neonates. Conclusions: We determined that intrauterine growth restriction induces increased IRS2 mRNA expression in cord blood, without hyperinsulinemia. The increased expression of IRS2 mRNA might be associated with abnormal glucose metabolism in SGA neonates. Our findings might lead to the elucidation of abnormal glucose metabolism in SGA neonates.
Collapse
Affiliation(s)
- Masanobu Fujimoto
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Yuki Kawashima Sonoyama
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Kenji Fukushima
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Aya Imamoto
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Fumiko Miyahara
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Naoki Miyahara
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Rei Nishimura
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Yuko Yamada
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Mazumi Miura
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Kaori Adachi
- Division of Functional Genomics, Research Center for Bioscience and Technology, Tottori University, Yonago, Japan 683-8504
| | - Eiji Nanba
- Division of Functional Genomics, Research Center for Bioscience and Technology, Tottori University, Yonago, Japan 683-8504
| | - Keiichi Hanaki
- Department of Women's and Children's Family Nursing, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| | - Susumu Kanzaki
- Division of Pediatrics and Perinatology, Tottori University Faculty of Medicine, Yonago, Japan 683-8504
| |
Collapse
|
10
|
Maternal Choline Supplementation Alters Fetal Growth Patterns in a Mouse Model of Placental Insufficiency. Nutrients 2017; 9:nu9070765. [PMID: 28718809 PMCID: PMC5537879 DOI: 10.3390/nu9070765] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/07/2017] [Accepted: 07/14/2017] [Indexed: 01/07/2023] Open
Abstract
Impairments in placental development can adversely affect pregnancy outcomes. The bioactive nutrient choline may mitigate some of these impairments, as suggested by data in humans, animals, and human trophoblasts. Herein, we investigated the effects of maternal choline supplementation (MCS) on parameters of fetal growth in a Dlx3+/− (distal-less homeobox 3) mouse model of placental insufficiency. Dlx3+/− female mice were assigned to 1X (control), 2X, or 4X choline intake levels during gestation. Dams were sacrificed at embryonic days E10.5, 12.5, 15.5, and 18.5. At E10.5, placental weight, embryo weight, and placental efficiency were higher in 4X versus 1X choline. Higher concentrations of hepatic and placental betaine were detected in 4X versus 1X choline, and placental betaine was positively associated with embryo weight. Placental mRNA expression of Igf1 was downregulated by 4X (versus 1X) choline at E10.5. No differences in fetal growth parameters were detected at E12.5 and 15.5, whereas a small but significant reduction in fetal weight was detected at E18.5 in 4X versus 1X choline. MCS improved fetal growth during early pregnancy in the Dlx3+/− mice with the compensatory downregulation of Igf1 to slow growth as gestation progressed. Placental betaine may be responsible for the growth-promoting effects of choline.
Collapse
|
11
|
Mericq V, Martinez-Aguayo A, Uauy R, Iñiguez G, Van der Steen M, Hokken-Koelega A. Long-term metabolic risk among children born premature or small for gestational age. Nat Rev Endocrinol 2017; 13:50-62. [PMID: 27539244 DOI: 10.1038/nrendo.2016.127] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Accumulating evidence suggests that both the intrauterine environment and growth during early life can influence the development of chronic noncommunicable diseases, such as type 2 diabetes mellitus and cardiovascular disease, in adulthood. Here, we review the available human data supporting increased metabolic risk among children born premature or small for gestational age; the adrenal and pubertal modifications that contribute to this risk; metabolic changes that occur during adolescence and early adulthood; and approaches to potentially modify or decrease risk of metabolic disease. The risks associated with delivery at term or preterm are compared for each period of life. Knowledge of these associations is fundamental for the paediatric community to develop preventive strategies early during postnatal life.
Collapse
Affiliation(s)
- Veronica Mericq
- Institute of Maternal and Child Research, University of Chile, Santiago, 8330091, Chile
| | - Alejandro Martinez-Aguayo
- Pediatrics Division, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, 8330074, Chile
| | - Ricardo Uauy
- Pediatrics Division, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, 8330074, Chile
- Institute of Nutrition and Food Technology, University of Chile, Santiago, 7810851, Chile
| | - German Iñiguez
- Institute of Maternal and Child Research, University of Chile, Santiago, 8330091, Chile
| | - Manouk Van der Steen
- Dutch Growth Research Foundation, 3001 KB Rotterdam, The Netherlands
- Department of Pediatrics, Subdivision of Endocrinology, Erasmus University Medical Center, Sophia Children's Hospital, 3000 CB Rotterdam, The Netherlands
| | - Anita Hokken-Koelega
- Dutch Growth Research Foundation, 3001 KB Rotterdam, The Netherlands
- Department of Pediatrics, Subdivision of Endocrinology, Erasmus University Medical Center, Sophia Children's Hospital, 3000 CB Rotterdam, The Netherlands
| |
Collapse
|
12
|
Nawathe AR, Christian M, Kim SH, Johnson M, Savvidou MD, Terzidou V. Insulin-like growth factor axis in pregnancies affected by fetal growth disorders. Clin Epigenetics 2016; 8:11. [PMID: 26823688 PMCID: PMC4730659 DOI: 10.1186/s13148-016-0178-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 01/19/2016] [Indexed: 01/22/2023] Open
Abstract
Background Insulin-like growth factors 1 and 2 (IGF1 and IGF2) and their binding proteins (IGFBPs) are expressed in the placenta and known to regulate fetal growth. DNA methylation is an epigenetic mechanism which involves addition of methyl group to a cytosine base in the DNA forming a methylated cytosine-phosphate-guanine (CpG) dinucleotide which is known to silence gene expression. This silences gene expression, potentially altering the expression of IGFs and their binding proteins. This study investigates the relationship between DNA methylation of components of the IGF axis in the placenta and disorders in fetal growth. Placental samples were obtained from cord insertions immediately after delivery from appropriate, small (defined as birthweight <10th percentile for the gestation [SGA]) and macrosomic (defined as birthweight > the 90th percentile for the gestation [LGA]) neonates. Placental DNA methylation, mRNA expression and protein levels of components of the IGF axis were determined by pyrosequencing, rtPCR and Western blotting. Results In the placenta from small for gestational age (SGA) neonates (n = 16), mRNA and protein levels of IGF1 were lower and of IGFBPs (1, 2, 3, 4 and 7) were higher (p < 0.05) compared to appropriately grown neonates (n = 37). In contrast, in the placenta from large for gestational age (LGA) neonates (n = 20), mRNA and protein levels of IGF1 was not different and those of IGFBPs (1, 2, 3 and 4) were lower (p < 0.05) compared to appropriately grown neonates. Compared to appropriately grown neonates, CpG methylation of the promoter regions of IGF1 was higher in SGA neonates. The CpG methylation of the promoter regions of IGFBP1, IGFBP2, IGFBP3, IGFBP4 and IGFBP7 was lower in the placenta from SGA neonates as compared to appropriately grown neonates, but was unchanged in the placenta from LGA neonates. Conclusions Our results suggest that changes in CpG methylation contribute to the changes in gene expression of components of the IGF axis in fetal growth disorders. Differential methylation of the IGF1 gene and its binding proteins is likely to play a role in the pathogenesis of SGA neonates.
Collapse
Affiliation(s)
- Aamod R Nawathe
- Imperial College London, London, UK ; Academic Department of Obstetrics and Gynaecology, Chelsea and Westminster Hospital, London, UK
| | - Mark Christian
- Warwick Medical School, University of Warwick, Coventry, UK
| | - Sung Hye Kim
- Academic Department of Obstetrics and Gynaecology, Chelsea and Westminster Hospital, London, UK
| | - Mark Johnson
- Imperial College London, London, UK ; Academic Department of Obstetrics and Gynaecology, Chelsea and Westminster Hospital, London, UK
| | - Makrina D Savvidou
- Imperial College London, London, UK ; Academic Department of Obstetrics and Gynaecology, Chelsea and Westminster Hospital, London, UK
| | - Vasso Terzidou
- Imperial College London, London, UK ; Academic Department of Obstetrics and Gynaecology, Chelsea and Westminster Hospital, London, UK
| |
Collapse
|
13
|
Robajac D, Vanhooren V, Masnikosa R, Miković Ž, Mandić V, Libert C, Nedić O. Preeclampsia transforms membrane N-glycome in human placenta. Exp Mol Pathol 2015; 100:26-30. [PMID: 26655437 DOI: 10.1016/j.yexmp.2015.11.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 11/30/2015] [Indexed: 12/24/2022]
Abstract
Posttranslational modifications (PTM) which accompany pathological conditions affect protein structure, characteristics and modulate its activity. Glycosylation is one of the most frequent PTM influencing protein folding, localisation and function. Hypertension is a common gestational complication, which can lead to foetal growth restriction (IUGR) and even to foetal or maternal death. In this work we focused on the impact of preeclampsia complicated with IUGR on placental membrane N-glycome. Results have shown that preeclampsia reduced fucosylation of placental glycans, increased the appearance of paucimannosidic and mannosidic structures with lower number of mannose residues and decreased the amount of glycans with more mannose residues. Since preeclampsia is tightly connected to IUGR, glycosylation changes were investigated also on the functional membrane receptors responsible for growth: insulin receptor and the type 1 insulin-like growth factor receptor (IR and IGF1R). It was found that IR present in the IUGR placenta contained significantly less α2,6-Sia. Therefore, glycans on placental membranes alter due to preeclampsia, but changes seen at the level of the entire N-glycome may be different from the changes detected at the level of a specific glycoprotein. The difference recorded due to pathology in one membrane molecule (IR) was not found in another homologous molecule (IGF1R). Thus, besides studying the glycosylation pattern of the entire placental membrane due to preeclampsia, it is inevitable to study directly glycoprotein of interest, as no general assumptions or extrapolations can be made.
Collapse
Affiliation(s)
- Dragana Robajac
- Institute for the Application of Nuclear Energy - INEP, University of Belgrade, Belgrade 381, Serbia.
| | - Valerie Vanhooren
- Department for Molecular Biomedical Research, VIB, Ghent 32, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent 32, Belgium
| | - Romana Masnikosa
- Institute for the Application of Nuclear Energy - INEP, University of Belgrade, Belgrade 381, Serbia
| | - Željko Miković
- Department of High-risk Pregnancies, Clinic of Gynaecology and Obstetrics "Narodni Front", University of Belgrade, Belgrade 381, Serbia
| | - Vesna Mandić
- Department of High-risk Pregnancies, Clinic of Gynaecology and Obstetrics "Narodni Front", University of Belgrade, Belgrade 381, Serbia
| | - Claude Libert
- Department for Molecular Biomedical Research, VIB, Ghent 32, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent 32, Belgium
| | - Olgica Nedić
- Institute for the Application of Nuclear Energy - INEP, University of Belgrade, Belgrade 381, Serbia
| |
Collapse
|
14
|
Storr HL, Prasad R, Temple IK, Metherell LA, Savage MO, Walker JM. Heterogeneity of the growth phenotype and birth size in acid-labile subunit (ALS) deficiency. J Endocrinol Invest 2015; 38:407-12. [PMID: 25352235 DOI: 10.1007/s40618-014-0195-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 10/10/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE The IGFALS gene encodes the acid-labile subunit (ALS) protein, which regulates circulating IGF-1. Human IGFALS mutations cause growth hormone insensitivity (GHI) associated with ALS, IGF-1 and IGFBP-3 deficiencies and mild to moderate postnatal growth impairment (height SDS -2 to -4). Prenatal growth impairment is not a recognised feature of this disorder, but heterozygous carriers may show an intermediate phenotype. METHODS We report a family of five subjects, including three children born small for gestational age, who were investigated for IGFALS gene mutations. RESULTS The proband, an 8.7 years female with pre- and postnatal growth failure (BW SDS -3.04, Ht SDS -3.86) and biochemical features of GHI, had a homozygous mutation of IGFALS, c.401T>A; p.L134Q. Her 6.1 years brother (BW SDS -2.11, Ht SDS -2.0) had the same homozygous IGFALS mutation. Both parents [adult height SDS -1.76 (father) and -1.82 (mother)] and her 2.7 years sister (BW SDS -2.60, Ht SDS -2.04) were heterozygous for the IGFALS mutation. CONCLUSION Significant phenotypic heterogeneity was observed between family members, in particular varying degrees of prenatal growth retardation were present in the three siblings, which may have contributed to the variation in the postnatal growth phenotype.
Collapse
Affiliation(s)
- H L Storr
- Centre for Endocrinology, John Vane Science Centre, William Harvey Research Institute (WHRI), Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK.
| | - R Prasad
- Centre for Endocrinology, John Vane Science Centre, William Harvey Research Institute (WHRI), Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - I K Temple
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - L A Metherell
- Centre for Endocrinology, John Vane Science Centre, William Harvey Research Institute (WHRI), Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - M O Savage
- Centre for Endocrinology, John Vane Science Centre, William Harvey Research Institute (WHRI), Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - J M Walker
- Department of Paediatric Endocrinology, Portsmouth Hospitals National Health Service Trust, Portsmouth, UK
| |
Collapse
|
15
|
Ahlsson F, Åkerud H, Schijven D, Olivier J, Sundström-Poromaa I. Gene Expression in Placentas From Nondiabetic Women Giving Birth to Large for Gestational Age Infants. Reprod Sci 2015; 22:1281-8. [PMID: 25824011 DOI: 10.1177/1933719115578928] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gestational diabetes, obesity, and excessive weight gain are known independent risk factors for the birth of a large for gestational age (LGA) infant. However, only 1 of the 10 infants born LGA is born by mothers with diabetes or obesity. Thus, the aim of the present study was to compare placental gene expression between healthy, nondiabetic mothers (n = 22) giving birth to LGA infants and body mass index-matched mothers (n = 24) giving birth to appropriate for gestational age infants. In the whole gene expression analysis, only 29 genes were found to be differently expressed in LGA placentas. Top upregulated genes included insulin-like growth factor binding protein 1, aminolevulinate δ synthase 2, and prolactin, whereas top downregulated genes comprised leptin, gametocyte-specific factor 1, and collagen type XVII α 1. Two enriched gene networks were identified, namely, (1) lipid metabolism, small molecule biochemistry, and organismal development and (2) cellular development, cellular growth, proliferation, and tumor morphology.
Collapse
Affiliation(s)
- F Ahlsson
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - H Åkerud
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - D Schijven
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - J Olivier
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden Department of Behavioral Physiology, University of Groningen, Groningen, the Netherlands Centre for Gender Medicine, Karolinska Institutet, Stockholm, Sweden
| | - I Sundström-Poromaa
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| |
Collapse
|
16
|
Gatford KL, Heinemann GK, Thompson SD, Zhang JV, Buckberry S, Owens JA, Dekker GA, Roberts CT. Circulating IGF1 and IGF2 and SNP genotypes in men and pregnant and non-pregnant women. Endocr Connect 2014; 3:138-49. [PMID: 25117571 PMCID: PMC4151385 DOI: 10.1530/ec-14-0068] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Circulating IGFs are important regulators of prenatal and postnatal growth, and of metabolism and pregnancy, and change with sex, age and pregnancy. Single-nucleotide polymorphisms (SNPs) in genes coding for these hormones associate with circulating abundance of IGF1 and IGF2 in non-pregnant adults and children, but whether this occurs in pregnancy is unknown. We therefore investigated associations of plasma IGF1 and IGF2 with age and genotype at candidate SNPs previously associated with circulating IGF1, IGF2 or methylation of the INS-IGF2-H19 locus in men (n=134), non-pregnant women (n=74) and women at 15 weeks of gestation (n=98). Plasma IGF1 concentrations decreased with age (P<0.001) and plasma IGF1 and IGF2 concentrations were lower in pregnant women than in non-pregnant women or men (each P<0.001). SNP genotypes in the INS-IGF2-H19 locus were associated with plasma IGF1 (IGF2 rs680, IGF2 rs1004446 and IGF2 rs3741204) and IGF2 (IGF2 rs1004446, IGF2 rs3741204 and H19 rs217727). In single SNP models, effects of IGF2 rs680 were similar between groups, with higher plasma IGF1 concentrations in individuals with the GG genotype when compared with GA (P=0.016), or combined GA and AA genotypes (P=0.003). SNPs in the IGF2 gene associated with IGF1 or IGF2 were in linkage disequilibrium, hence these associations could reflect other genotype variations within this region or be due to changes in INS-IGF2-H19 methylation previously associated with some of these variants. As IGF1 in early pregnancy promotes placental differentiation and function, lower IGF1 concentrations in pregnant women carrying IGF2 rs680 A alleles may affect placental development and/or risk of pregnancy complications.
Collapse
Affiliation(s)
- K L Gatford
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - G K Heinemann
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - S D Thompson
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - J V Zhang
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - S Buckberry
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - J A Owens
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - G A Dekker
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - C T Roberts
- School of Paediatrics and Reproductive HealthRobinson Research Institute, University of Adelaide, Adelaide, South Australia 5005, Australia
| |
Collapse
|
17
|
Iñiguez G, Castro JJ, Garcia M, Kakarieka E, Johnson MC, Cassorla F, Mericq V. IGF-IR signal transduction protein content and its activation by IGF-I in human placentas: relationship with gestational age and birth weight. PLoS One 2014; 9:e102252. [PMID: 25050889 PMCID: PMC4106823 DOI: 10.1371/journal.pone.0102252] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 06/16/2014] [Indexed: 02/05/2023] Open
Abstract
Introduction The human placenta expresses the IGF-I and IGF-IR proteins and their intracellular signal components (IRS-1, AKT and mTOR). The aim of this study was to assess the IGF-IR content and activation of downstream signaling molecules in placentas from newborns who were classified by gestational age and birth weight. We studied placentas from 25 term appropriate (T-AGA), 26 term small (T-SGA), 22 preterm AGA (PT-AGA), and 20 preterm SGA (PT-SGA) newborns. The total and phosphorylated IGF-IR, IRS-1, AKT, and mTOR contents were determined by Western Blot and normalized by actin or with their respective total content. The effect of IGF-I was determined by stimulating placental explants with recombinant IGF-I 10-8 mol/L for 15, 30, and 60 minutes. Results The IGF-IR content was higher in T-SGA compared to T-AGA placentas, and the IRS-1 content was higher in PT-placentas compared with their respective T-placentas. The effect of IGF-I on the phosphorylated forms of IGF-IR was increased in T-SGA (150%) and PT-SGA (300%) compared with their respective AGA placentas. In addition, AKT serine phosphorylation was higher in PT-SGA compared to PT-AGA and T-SGA placentas (90% and 390% respectively). Conclusion The higher protein content and response to IGF-I of IGF-IR, IRS-1, and AKT observed in SGA placentas may represent a compensatory mechanism in response to fetal growth restriction.
Collapse
Affiliation(s)
- Germán Iñiguez
- Institute of Maternal and Child Research, University of Chile, Santiago, Chile
- * E-mail:
| | - Juan José Castro
- Institute of Maternal and Child Research, University of Chile, Santiago, Chile
| | - Mirna Garcia
- Hospital Clínico San Borja-Arriarán, University of Chile, Santiago, Chile
| | - Elena Kakarieka
- Hospital Clínico San Borja-Arriarán, University of Chile, Santiago, Chile
| | - M. Cecilia Johnson
- Institute of Maternal and Child Research, University of Chile, Santiago, Chile
| | - Fernando Cassorla
- Institute of Maternal and Child Research, University of Chile, Santiago, Chile
| | - Verónica Mericq
- Institute of Maternal and Child Research, University of Chile, Santiago, Chile
| |
Collapse
|
18
|
Demetriou C, Abu-Amero S, Thomas AC, Ishida M, Aggarwal R, Al-Olabi L, Leon LJ, Stafford JL, Syngelaki A, Peebles D, Nicolaides KH, Regan L, Stanier P, Moore GE. Paternally expressed, imprinted insulin-like growth factor-2 in chorionic villi correlates significantly with birth weight. PLoS One 2014; 9:e85454. [PMID: 24454871 PMCID: PMC3893199 DOI: 10.1371/journal.pone.0085454] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 12/04/2013] [Indexed: 12/27/2022] Open
Abstract
Context Fetal growth involves highly complex molecular pathways. IGF2 is a key paternally expressed growth hormone that is critical for in utero growth in mice. Its role in human fetal growth has remained ambiguous, as it has only been studied in term tissues. Conversely the maternally expressed growth suppressor, PHLDA2, has a significant negative correlation between its term placental expression and birth weight. Objective The aim of this study is to address the role in early gestation of expression of IGF1, IGF2, their receptors IGF1R and IGF2R, and PHLDA2 on term birth weight. Design Real-time quantitative PCR was used to investigate mRNA expression of IGF1, IGF2, IGF1R, IGF2R and PHLDA2 in chorionic villus samples (CVS) (n = 260) collected at 11–13 weeks' gestation. Expression was correlated with term birth weight using statistical package R including correction for several confounding factors. Results Transcript levels of IGF2 and IGF2R revealed a significant positive correlation with birth weight (0.009 and 0.04, respectively). No effect was observed for IGF1, IGF1R or PHLDA2 and birth weight. Critically, small for gestational age (SGA) neonates had significantly lower IGF2 levels than appropriate for gestational age neonates (p = 3·6×10−7). Interpretation Our findings show that IGF2 mRNA levels at 12 weeks gestation could provide a useful predictor of future fetal growth to term, potentially predicting SGA babies. SGA babies are known to be at a higher risk for type 2 diabetes. This research reveals an imprinted, parentally driven rheostat for in utero growth.
Collapse
Affiliation(s)
- Charalambos Demetriou
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
- Department of Obstetrics and Gynaecology, St. Mary's Campus, Imperial College London, London, United Kingdom
| | - Sayeda Abu-Amero
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Anna C. Thomas
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Miho Ishida
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Reena Aggarwal
- Institute for Women's Health, University College London, London, United Kingdom
| | - Lara Al-Olabi
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Lydia J. Leon
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Jaime L. Stafford
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Argyro Syngelaki
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
| | - Donald Peebles
- Institute for Women's Health, University College London, London, United Kingdom
| | - Kypros H. Nicolaides
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
| | - Lesley Regan
- Department of Obstetrics and Gynaecology, St. Mary's Campus, Imperial College London, London, United Kingdom
| | - Philip Stanier
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
| | - Gudrun E. Moore
- Fetal Development and Growth Research Group, Clinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, United Kingdom
- * E-mail:
| |
Collapse
|
19
|
Abstract
PURPOSE OF REVIEW To describe our current understanding of the mechanisms involved in the regulation of linear growth in childhood obesity. RECENT FINDINGS The developmental origins hypothesis has focused on low birth weight individuals with subsequent obesity, identifying a cascade of neuroendocrine regulatory factors involved in the progressive increase in body fat and metabolic risk. Yet, tall stature is the common clinical outcome of childhood obesity. Recent data have expanded our understanding of environmental influences on developing systems. Here, we review the elements of neuroendocrine systems contributing to the integration of metabolic controls involved in growth regulation in the obese child with particular emphasis on growth hormone, ghrelin, insulin-like growth factors and insulin. SUMMARY Growth patterns of obesity during childhood are well described, documenting increased linear growth in early childhood associated with accelerated pubertal maturation resulting in normal adult height. Despite recent data suggesting that ghrelin and the growth hormone secretagogue receptor, as well as the insulin-like growth factors, their binding proteins and insulin have potential to be mediators of nutrient exposure and linear growth, it remains to be determined how these systems interrelate and determine growth. This is an area of ongoing investigation.
Collapse
Affiliation(s)
- Ilene Fennoy
- Division of Pediatric Endocrinology, Diabetes and Metabolism, Department of Pediatrics, Columbia University Medical Center, New York, New York, USA.
| |
Collapse
|
20
|
Tenta R, Bourgiezi I, Aliferis E, Papadopoulou M, Gounaris A, Skouroliakou M. Bone metabolism compensates for the delayed growth in small for gestational age neonates. Organogenesis 2013; 9:55-9. [PMID: 23538775 DOI: 10.4161/org.24251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The goal of the present study is to investigate the relationship between anthropometric and bone metabolism markers in a sample of neonates and their mothers. A sample of 20 SGA (small for the gestational age), AGA (appropriate for the gestational age) and LGA (large for the gestational age) term neonates and their 20 mothers was analyzed at birth and at exit. Elisa method was used to measure the OPG (Osteoprotegerin), RANK (Receptor activator of nuclear factor-kappaB), RANKL (Receptor activator of nuclear factor-kappaB Ligand), IGF-1 (Insulin-like growth factor 1), IGFBP3 (Insulin-like Growth Factor Binding Protein 3) and Leptin levels. Birth weight and length were positively correlated with RANKL, IGF-1 and IGFBP3 and negatively with the ratio OPG/RANKL. SGA neonates presented lower RANKL values and higher OPG/RANKL ratio while LGA neonates had higher RANK levels than AGA neonates. Positive association was shown between neonatal IGFBP3 and maternal IGF-1 values and between neonatal and maternal RANK values at birth and at exit. These results reveal a remarkable upregulation of OPG/RANKL ratio in SGA neonates, pointing out the role of bone turnover in compensating for the delayed neonatal growth.
Collapse
Affiliation(s)
- Roxane Tenta
- Department of Nutrition Science and Dietetics,Harokopio University, Athens, Greece.
| | | | | | | | | | | |
Collapse
|
21
|
Wells JC. Obesity as malnutrition: The role of capitalism in the obesity global epidemic. Am J Hum Biol 2012; 24:261-76. [DOI: 10.1002/ajhb.22253] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Revised: 01/07/2012] [Accepted: 01/09/2012] [Indexed: 12/20/2022] Open
|
22
|
Wells JCK. Ecogeographical associations between climate and human body composition: analyses based on anthropometry and skinfolds. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2011; 147:169-86. [PMID: 22212891 DOI: 10.1002/ajpa.21591] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 06/27/2011] [Indexed: 11/07/2022]
Abstract
In the 19th century, two "ecogeographical rules" were proposed hypothesizing associations of climate with mammalian body size and proportions. Data on human body weight and relative leg length support these rules; however, it is unknown whether such associations are attributable to lean tissue (the heat-producing component) or fat (energy stores). Data on weight, height, and two skinfold thickness were obtained from the literature for 137 nonindustrialized populations, providing 145 male and 115 female individual samples. A variety of indices of adiposity and lean mass were analyzed. Preliminary analyses indicated secular increases in skinfolds in men but not women, and associations of age and height with lean mass in both sexes. Decreasing annual temperature was associated with increasing body mass index (BMI), and increasing triceps but not subscapular skinfold. After adjusting for skinfolds, decreasing temperature remained associated with increasing BMI. These results indicate that colder environments favor both greater peripheral energy stores, and greater lean mass. Contrasting results for triceps and subscapular skinfolds might be due to adaptive strategies either constraining central adiposity in cold environments to reduce cardiovascular risk, or favoring central adiposity in warmer environments to maintain energetic support of the immune system. Polynesian populations were analyzed separately and contradicted all of the climate trends, indicating support for the hypothesis that they are cold-adapted despite occupying a tropical region. It is unclear whether such associations emerge through natural selection or through trans-generational and life-course plasticity. These findings nevertheless aid understanding of the wide variability in human physique and adiposity.
Collapse
Affiliation(s)
- Jonathan C K Wells
- Childhood Nutrition Research Center, UCL Institute of Child Health, University College London, 30 Guilford Street, London, UK.
| |
Collapse
|
23
|
Akram SK, Carlsson-Skwirut C, Bhutta ZA, Söder O. Placental IGF-I, IGFBP-1, zinc, and iron, and maternal and infant anthropometry at birth. Acta Paediatr 2011; 100:1504-9. [PMID: 21539604 DOI: 10.1111/j.1651-2227.2011.02336.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM To correlate placental protein levels of insulin-like growth factor (IGF)-I and insulin-like growth factor binding protein (IGFBP)-1, with previously determined levels of IGF-I and IGF-II mRNA expression, and the micronutrients zinc and iron, and maternal and newborn anthropometry. METHODS Placental samples were collected from rural field sites in Pakistan. Samples were divided into small and large for gestational age groups (SGA and LGA, respectively). IGFBP-1 levels were assessed using Western immunoblotting. IGF-I protein levels were assessed using ELISA techniques. IGF mRNA expression, zinc, and iron, were quantified as previously described and were used for comparative purposes only. RESULTS Thirty-three subjects were included (SGA, n = 12; LGA n = 21). Higher levels of IGFBP-1 were seen in the SGA group (p < 0.01). IGFBP-1 correlated positively with maternal and infant triceps skin-fold thickness in the LGA and SGA groups, respectively (p < 0.05). Significantly lower IGF-I protein levels were seen in the SGA group. IGF-I levels correlated significantly with maternal and newborn anthropometry. IGFBP-1 correlated significantly with IGF-II mRNA expression (p < 0.05). CONCLUSION Placental protein levels of IGF-I and IGFBP-1 appear to be associated with maternal anthropometry. Maternal anthropometry may thus influence IGFBP-1 and IGF-I levels and may possibly be used for screening of pregnancies, with the potential for timely identification of these high-risk pregnancies.
Collapse
|
24
|
Abstract
The scientific study of obesity has been dominated throughout the twentieth century by the concept of energy balance. This conceptual approach, based on fundamental thermodynamic principles, states that energy cannot be destroyed, and can only be gained, lost or stored by an organism. Its application in obesity research has emphasised excessive appetite (gluttony), or insufficient physical activity (sloth), as the primary determinants of excess weight gain, reflected in current guidelines for obesity prevention and treatment. This model cannot explain why weight accumulates persistently rather than reaching a plateau, and underplays the effect of variability in dietary constituents on energy and intermediary metabolism. An alternative model emphasises the capacity of fructose and fructose-derived sweeteners (sucrose, high-fructose corn syrup) to perturb cellular metabolism via modification of the adenosine monophosphate (AMP)/adenosine triphosphate (ATP) ratio, activation of AMP kinase and compensatory mechanisms, which favour adipose tissue accretion and increased appetite while depressing physical activity. This conceptual model implicates chronic hyperinsulinaemia in the presence of a paradoxical state of 'cellular starvation' as a key driver of the metabolic modifications inducing chronic weight gain. We combine evidence from in vitro and in vivo experiments to formulate a perspective on obesity aetiology that emphasises metabolic flexibility and dietary composition rather than energy balance. Using this model, we question the direction of causation of reported associations between obesity and sleep duration or childhood growth. Our perspective generates new hypotheses, which can be tested to improve our understanding of the current obesity epidemic, and to identify novel strategies for prevention or treatment.
Collapse
Affiliation(s)
- J C K Wells
- Childhood Nutrition Research Centre, UCL Institute of Child Health, London, UK.
| | | |
Collapse
|
25
|
van Duyvenvoorde HA, van Doorn J, Koenig J, Gauguin L, Oostdijk W, Wade JD, Karperien M, Ruivenkamp CAL, Losekoot M, van Setten PA, Walenkamp MJE, Noordam C, De Meyts P, Wit JM. The severe short stature in two siblings with a heterozygous IGF1 mutation is not caused by a dominant negative effect of the putative truncated protein. Growth Horm IGF Res 2011; 21:44-50. [PMID: 21237682 DOI: 10.1016/j.ghir.2010.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 12/14/2010] [Accepted: 12/16/2010] [Indexed: 11/24/2022]
Abstract
OBJECTIVE While in previous studies heterozygosity for an Insulin-Like Growth Factor 1 (IGF1) defect only modestly decreased height and head circumference, we recently reported on two siblings with severe short stature with a maternally transmitted heterozygous duplication of 4 nucleotides, resulting in a frame shift and a premature termination codon in the IGF1 gene. In this paper we describe the structural and functional characteristics of the putative truncated IGF-I protein. DESIGN Two children, their mother and maternal grandfather carried the mutation. In addition, two family members who were not affected were included in the study. Mutant (MT) IGF-I was synthesized in oxidized and reduced form using two methods. Neutral gel filtration studies were carried out with wild-type (WT) and synthetic MT IGF-I. Binding analysis of synthetic MT IGF-I to the IGF1R and insulin receptors were performed with EBNA-293 cells, stably transfected with the IGF-I receptor, and IM9 cells. L6 cells were used to examine the mitogenic potency and the potential antagonizing effect of synthetic MT IGF-I by [(3)H]-thymidine incorporation assays. RESULTS In the sera of both the carriers and non-carriers the proportion of (125)I-IGF-I that was associated with the 150 kDa complex was somewhat less (varying between ~37 and ~52%) than in normal pooled serum (~53-~63%) and, instead, slightly increased amounts of radioactivity were eluted in the 40-50 kDa fraction (consisting of binary IGF-IGFBP complexes) or remained unbound. Synthetic MT IGF-I did not bind to the IGF-I receptor, nor antagonize the growth-promoting effect of IGF-I. It did bind to IGFBPs, but was barely incorporated into 150 kDa complexes. Because in all cases WT IGF-I immunoreactivity was recovered in one peak, corresponding to the MW of WT IGF-I, i.e. ~7.6 kDa, an interaction of circulating truncated mutant peptide with WT IGF-I is very unlikely. CONCLUSIONS There is no evidence that the severe short stature associated with heterozygosity for this novel IGF1 mutation in children born from a mother with the same mutation is caused by a dominant negative effect of the truncated protein. We speculate that the growth failure is caused by a combination of partial IGF-I deficiency, placental IGF-I insufficiency, and other genetic factors.
Collapse
Affiliation(s)
- H A van Duyvenvoorde
- Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|