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Szydlowska-Gladysz J, Gorecka AE, Stepien J, Rysz I, Ben-Skowronek I. IGF-1 and IGF-2 as Molecules Linked to Causes and Consequences of Obesity from Fetal Life to Adulthood: A Systematic Review. Int J Mol Sci 2024; 25:3966. [PMID: 38612776 PMCID: PMC11012406 DOI: 10.3390/ijms25073966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024] Open
Abstract
This study examines the impact of insulin-like growth factor 1 (IGF-1) and insulin-like growth factor 2 (IGF-2) on various aspects of children's health-from the realms of growth and puberty to the nuanced characteristics of metabolic syndrome, diabetes, liver pathology, carcinogenic potential, and cardiovascular disorders. A comprehensive literature review was conducted using PubMed, with a Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method employing specific keywords related to child health, obesity, and insulin-like growth factors. This study reveals associations between insulin-like growth factor 1 and birth weight, early growth, and adiposity. Moreover, insulin-like growth factors play a pivotal role in regulating bone development and height during childhood, with potential implications for puberty onset. This research uncovers insulin-like growth factor 1 and insulin-like growth factor 2 as potential biomarkers and therapeutic targets for metabolic dysfunction-associated liver disease and hepatocellular carcinoma, and it also highlights the association between insulin-like growth factors (IGFs) and cancer. Additionally, this research explores the impact of insulin-like growth factors on cardiovascular health, noting their role in cardiomyocyte hypertrophy. Insulin-like growth factors play vital roles in human physiology, influencing growth and development from fetal stages to adulthood. The impact of maternal obesity on children's IGF levels is complex, influencing growth and carrying potential metabolic consequences. Imbalances in IGF levels are linked to a range of health conditions (e.g., insulin resistance, glucose intolerance, metabolic syndrome, and diabetes), prompting researchers to seek novel therapies and preventive strategies, offering challenges and opportunities in healthcare.
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Affiliation(s)
- Justyna Szydlowska-Gladysz
- Department of Pediatric Endocrinology and Diabetology with Endocrine-Metabolic Laboratory, Medical University in Lublin, 20-093 Lublin, Poland
| | | | | | | | - Iwona Ben-Skowronek
- Department of Pediatric Endocrinology and Diabetology with Endocrine-Metabolic Laboratory, Medical University in Lublin, 20-093 Lublin, Poland
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Cuenca Alcocel J, Villalba-Heredia L, Martínez Redondo I, Berrozpe-Villabona C, Casajús JA, Arbonés-Mainar JM, Calmarza P. Bone metabolism in children with normal weight and overweight/obesity in a northeastern region of Spain. ADVANCES IN LABORATORY MEDICINE 2024; 5:66-74. [PMID: 38634087 PMCID: PMC11019894 DOI: 10.1515/almed-2024-0026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 11/28/2023] [Indexed: 04/19/2024]
Abstract
Objectives Bone mass progressively increases to peak during childhood and adolescence, which determines future bone health. Bone formation-resorption processes are assessed using bone markers. However, studies on the impact of obesity on bone turnover markers at this age are limited, and results are inconsistent. The objective of this study was to examine the potential impact of overweight/obesity on bone metabolism. Methods A study was performed to compare parameters of bone metabolism in 45 girls and boys with normal weight (controls) and in a group of 612 girls and boys with overweight/obesity (cases) from the Exergames study (University of Zaragoza). Ages ranged from 8 to 12 years. Results Higher values of phosphorus and IGFBP-3 were observed in children with overweight/obesity, as compared to children with normal weight, (p=0.042) and (p=0.042), respectively. BAP, osteocalcin, magnesium, vitamin D and IGF-I concentrations were lower in the group with overweight/obesity, whereas calcium concentrations were higher in this group, although differences were not statistically significant. A negative correlation was found (r=-0.193) (p=0.049) between BAP and BMI. Conclusions Although differences did not reach statistical significance, BAP and osteocalcin concentrations were lower in children with overweight/obesity. This added to the negative correlation found between BAP and MIC may demonstrate that overweight/obesity may negatively affect bone health already at a young age.
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Affiliation(s)
| | | | | | | | - José Antonio Casajús
- GENUD (Growth, Exercise, Nutrition and Development) Research Group, University of Zaragoza, Healthcare Research Institute of Aragon (IIS Aragón), Zaragoza, Spain
- Biomedical Research Networking Center for Physiopathology of Obesity and Nutrition (CIBEROBN), Carlos III Health Institute, Madrid, Spain
- Department of Physiatry and Nursing, Faculty of Health and Sports Sciences, University of Zaragoza, Zaragoza, Spain
| | - José Miguel Arbonés-Mainar
- Adipocyte and Fat Biology Laboratory (AdipoFat), Transversal Research Unit, Miguel Servet University Hospital, Health Research Institute (IIS) Aragón, Zaragoza, Spain
- Aragonese Institute of Health Sciences (IACS), Zaragoza, Spain
- CIBER Pathophysiology Obesity and Nutrition (CIBERObn), Carlos III Health Institute, Madrid, Spain
| | - Pilar Calmarza
- Service of Clinical Biochemistry, Miguel Servet University Hospital, Zaragoza, Spain
- Network Research Center for Cardiovascular Diseases (CIBERCV), University of Zaragoza, Healthcare Research Institute of Aragon (IIS Aragón), Zaragoza, Spain
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Cuenca Alcocel J, Villalba-Heredia L, Martínez Redondo I, Berrozpe-Villabona C, Casajús JA, Arbonés-Mainar JM, Calmarza P. Metabolismo óseo en niños aragoneses con normopeso y niños con sobrepeso/obesidad. ADVANCES IN LABORATORY MEDICINE 2024; 5:75-84. [PMID: 38634080 PMCID: PMC11019878 DOI: 10.1515/almed-2023-0065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 11/28/2023] [Indexed: 04/19/2024]
Abstract
Objetivos En la infancia y adolescencia se produce un aumento de masa ósea, hasta alcanzar un pico máximo, determinante para la salud ósea. Los marcadores óseos evalúan los procesos de formación-resorción ósea. Sin embargo, los estudios sobre la influencia de la obesidad en los marcadores de recambio óseo en esta edad, son escasos y los resultados contradictorios. El objetivo de nuestro estudio fue evaluar si el sobrepeso/obesidad influían en el metabolismo óseo. Métodos Se compararon parámetros relacionados con el metabolismo óseo, en 45 niños y niñas normopeso (controles) y en un grupo de 61 niños y niñas con sobrepeso/obesidad (casos), procedentes del estudio Exergames (Universidad de Zaragoza), de edades comprendidas, todos ellos, entre 8 y 12 años. Resultados La concentración de fósforo y la de IGFBP-3 fueron superiores en los niños con sobrepeso/obesidad, respecto a la de los niños normopeso, (p=0,042) y (p=0,042), respectivamente. Las concentraciones de BAP, osteocalcina, magnesio, vitamina D e IGF-I fueron más bajas en el grupo de los niños con sobrepeso/obesidad y la de calcio más elevada, pero las diferencias no fueron estadísticamente significativas. Existe correlación negativa (r=−0,193) (p=0,049) entre BAP e IMC. Conclusiones En los niños con sobrepeso/obesidad pese a que no se llegó a alcanzar significación estadística, la concentración de BAP y osteocalcina fue inferior a la de los niños normopeso, lo cual junto con la correlación negativa de BAP respecto al IMC encontrada, puede indicar que ya en edades tan tempranas el sobrepeso/obesidad puede afectar a la salud ósea.
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Affiliation(s)
| | | | | | | | - José Antonio Casajús
- GENUD (Growth, Exercise, Nutrition and Development) Research Group, Universidad de Zaragoza, Instituto de Investigación Sanitaria Aragón (IIS Aragón)Zaragoza, España
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos IIIMadrid, España
- Departamento de Fisiatría y Enfermería, Facultad de Ciencias de la Salud y el Deporte, Universidad de ZaragozaZaragoza, España
| | - José Miguel Arbonés-Mainar
- Adipocyte and Fat Biology Laboratory (AdipoFat), Unidad de Investigación Transversal, Hospital Universitario Miguel Servet, Instituto de Investigación Sanitaria (IIS), Zaragoza, Aragón, España
- Instituto Aragonés de Ciencias de la Salud (IACS), Zaragoza, España
- CIBER Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, Madrid, España
| | - Pilar Calmarza
- Servicio de Bioquímica Clínica, Hospital Universitario Miguel Servet, Zaragoza, España
- Centro de Investigación en Red en Enfermedades Cardiovasculares (CIBERCV), Universidad de Zaragoza, Instituto de Investigación Sanitaria Aragón (IIS Aragón)Zaragoza, España
- Miembro de las Comisiones de Estrés Oxidativo y Lipoproteínas y Enfermedades vasculares de la SEQC-ML, Servicio de Bioquímica Clínica, Hospital Universitario Miguel ServetZaragoza, España
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Hörenz C, Vogel M, Wirkner K, Ceglarek U, Thiery J, Pfäffle R, Kiess W, Kratzsch J. BMI and Contraceptives Affect New Age-, Sex-, and Puberty-adjusted IGF-I and IGFBP-3 Reference Ranges Across Life Span. J Clin Endocrinol Metab 2022; 107:e2991-e3002. [PMID: 35294528 DOI: 10.1210/clinem/dgac157] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Indexed: 01/22/2023]
Abstract
CONTEXT Various clinical factors influencing serum levels of insulin-like growth factor I (IGF-I) and its binding protein 3 (IGFBP-3) are not entirely consistently described. OBJECTIVE We asked whether body mass index (BMI), contraceptive drugs (CDs), and hormone replacement therapy (HRT) have potential effects on data for interpreting new age-, sex-, and puberty-adjusted reference ranges for IGF-I and IGFBP-3 serum levels. DESIGN AND SETTING Subjects were mainly participants from 2 population-based cohort studies: the LIFE Child study of children and adolescents and the LIFE Adult study. PARTICIPANTS We investigated 9400 serum samples from more than 7000 healthy and 1278 obese subjects between 3 months and 81 years old. MAIN OUTCOME MEASURES Associations between IGF-I or IGFBP-3, measured with a new electrochemiluminescence immunoassay, and the predictors BMI and CDs were estimated using hierarchical linear modeling. RESULTS During infancy, obese children had up to 1 SD score (SDS) higher mean predicted IGF-I values, converging with levels of normal-weight subjects up to 13 years old. Between 20 and 40 years of age, obesity was related to up to -0.5 lower IGF-I SDS values than the predicted values. Obesity had less impact on IGFBP-3. Estrogen- and progestin-based CDs, but not HRT, decreased IGF-I and increased IGFBP-3 (P < 0.01) in adolescents (β IGF-I = -0.45, β IGFBP-3 = 0.94) and adults (β IGF-I = -0.43, β IGFBP-3 = 1.12). Conversely, progestin-based CDs were significantly positive associated with IGF-I (β IGF-I =0.82). CONCLUSIONS BMI and CDs must be considered when assessing and interpreting the clinical relevance of IGF-I and IGFBP-3 measurements.
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Affiliation(s)
- Charlott Hörenz
- LIFE-Leipzig Research Center for Civilization Diseases, Leipzig University, Leipzig, Germany
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Leipzig, Germany
- Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Leipzig, Germany
| | - Mandy Vogel
- LIFE-Leipzig Research Center for Civilization Diseases, Leipzig University, Leipzig, Germany
| | - Kerstin Wirkner
- LIFE-Leipzig Research Center for Civilization Diseases, Leipzig University, Leipzig, Germany
| | - Uta Ceglarek
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Leipzig, Germany
| | - Joachim Thiery
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Leipzig, Germany
| | - Roland Pfäffle
- Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Leipzig, Germany
| | - Wieland Kiess
- LIFE-Leipzig Research Center for Civilization Diseases, Leipzig University, Leipzig, Germany
- Department of Women and Child Health, Hospital for Children and Adolescents and Center for Pediatric Research (CPL), Leipzig University, Leipzig, Germany
| | - Jürgen Kratzsch
- LIFE-Leipzig Research Center for Civilization Diseases, Leipzig University, Leipzig, Germany
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM) Leipzig University, Leipzig, Germany
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Lee SC, Hsiao JK, Yang YC, Haung JC, Tien LY, Li DE, Tsai SM. Insulin-like growth factor-1 positively associated with bone formation markers and creatine kinase in adults with general physical activity. J Clin Lab Anal 2021; 35:e23799. [PMID: 34143515 PMCID: PMC8373336 DOI: 10.1002/jcla.23799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/01/2021] [Accepted: 04/03/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND The Insulin-like growth factor-1 (IGF-1) is primarily synthesized by hepatocytes in a growth hormone (GH)-dependent manner, it is also produced by bone and muscle. The effects of exercise on the associations between IGF-1 levels and bone turnover markers (BTM) were found in the previous studies. However, the associations between the levels of IGF-1 and BTM, liver function tests, and skeletal muscle markers in adults with general physical activity were not clear. METHODS Ninety-four participants were recruited from healthy survey. Blood samples were collected to analyze the levels of IGF-1, total protein (TP), albumin (Alb), total bilirubin (T-Bil), direct bilirubin (D-Bil), aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), bone alkaline phosphatase (BALP), lactate dehydrogenase (LDH), creatine kinase (CK), creatinine (CRTN), and glucose. Urine samples were collected to analyze the CRTN and deoxypyridinoline (Dpd) levels. RESULTS The positively significant associations were found between the IGF-1 levels and the levels of ALP, BALP, and CK, respectively. No significant associations were found between the IGF-1 levels and the levels of TP, Alb, A/G, T-Bil, D-Bil, AST, ALT, LDH, glucose, urinary CRTN, urinary Dpd, and Dpd/CRTN ratios, respectively. CONCLUSION The serum IGF-1 levels associated with the levels of skeletal muscle and bone formation markers (BFM), not the bone resorption markers under general physical activity in the healthy adults. The physician needs to consider the effects of bone formation and skeletal muscle markers on the IGF-1 levels in the management of IGF-1-related disorders.
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Affiliation(s)
- Su-Chen Lee
- Department of Laboratory Medicine, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Jen-Kuei Hsiao
- Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Yu-Chun Yang
- Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Jung-Chih Haung
- Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Li-Ying Tien
- Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Dai-En Li
- Department of Nuclear Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Shih-Meng Tsai
- Department of Public Health and Environmental Medicine, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Serum IGF1 and linear growth in children with congenital leptin deficiency before and after leptin substitution. Int J Obes (Lond) 2021; 45:1448-1456. [PMID: 34002033 PMCID: PMC8236407 DOI: 10.1038/s41366-021-00809-2] [Citation(s) in RCA: 4] [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] [Received: 10/08/2020] [Revised: 02/19/2021] [Accepted: 03/22/2021] [Indexed: 02/04/2023]
Abstract
BACKGROUND Evidence from in vitro and rodent studies suggests that leptin, a key signal of long-term energy reserves, promotes IGF1 synthesis and linear growth. This effect of leptin has not been fully investigated in humans. The aim of our study was to investigate the effect of leptin substitution on growth factors and linear growth in children with congenital leptin deficiency (CLD). METHODS In this cohort study we included eight pediatric patients (six males), age 0.9-14.8 years, who were diagnosed with CLD and received leptin substitution at our University Medical Center. We calculated standard deviation scores (SDS) for serum levels of IGF1 and IGFBP3, IGF1/IGFBP3 molar ratio, and height at baseline (T0) and 12 months (T12) after the initiation of substitution with metreleptin. RESULTS All patients had severe obesity (BMI-SDS mean ± SD: 4.14 ± 1.51) at T0 and significant BMI-SDS reduction to 2.47 ± 1.05 at T12. At T0, all patients were taller than the mid-parental median, yet had low IGF1 and IGF1/IGFBP3 molar ratios (IGF1-SDS[Formula: see text]T0: -1.58 ± 0.92, IGF1/IGFBP3 molar ratio-SDS[Formula: see text]T0: -1.58 ± 0.88). At T12, IGF1-SDS increased significantly (∆T0-12: 1.63 ± 1.40, p = 0.01), and IGFBP3-SDS and IGF1/IGFBP3 molar ratio-SDS showed a trend toward an increase. In the three children within the childhood growth period (post-infancy, pre-puberty) height-SDS increased (∆height-SDST0-12: 0.57 ± 0.06, p = 0.003) despite substantial weight loss. CONCLUSIONS These results in CLD patients are contrary to observations in children with idiopathic obesity who typically have above-mean IGF1 levels that decrease with weight loss, and therefore suggest that leptin increases IGF1 levels and promotes linear growth.
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Vincent A, Souberbielle JC, Brauner R. Comparison of two bone markers with growth evolution in 74 girls with central precocious puberty. BMC Pediatr 2018; 18:224. [PMID: 29986677 PMCID: PMC6038288 DOI: 10.1186/s12887-018-1194-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/26/2018] [Indexed: 11/10/2022] Open
Abstract
Background The bone markers bone alkaline phosphatase (BAP) and C-terminal telopeptide of type I collagen crosslinks (CTX) are correlated with growth rate during normal puberty. The objective of this study was to evaluate the relationship between the serum concentrations of BAP and CTX and growth evolution in girls with idiopathic central precocious puberty (CPP) to help predict adult height. Methods A retrospective single-center study was conducted in 74 girls with CPP for whom a serum sample at initial evaluation was available to retrospectively measure BAP and CTX concentrations; 66.2% of them were untreated. Results The serum BAP concentrations showed significant positive correlations with height in standard deviations (SDS) at the initial evaluation (n = 62; r = 0.31; p = 0.015) and with the difference between bone and chronological ages (n = 61; r = 0.39; p = 0.002). BAP was also positively correlated with adult height as measured in both cm and SDS in untreated patients (n = 19; r = 0.58; p = 0.009). The serum CTX concentrations showed significant positive correlations with growth rate the year before the initial evaluation as measured in both cm and SDS (n = 65; r = 0.34; p = 0.006). Conclusions This study revealed significant correlations of serum BAP and CTX concentrations with growth evolution in girls with CPP. The high positive correlation between serum BAP and adult height in untreated girls suggests that BAP can possibly be used to optimize models of adult height prediction in girls with CPP.
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Affiliation(s)
- Audrey Vincent
- Fondation Ophtalmologique Adolphe de Rothschild and Université Paris Descartes, 75940, Paris, France
| | - Jean-Claude Souberbielle
- Hôpital Necker-Enfants Malades, Service d'Explorations Fonctionnelles, Assistance Publique-Hôpitaux de Paris, 75743, Paris, France
| | - Raja Brauner
- Fondation Ophtalmologique Adolphe de Rothschild and Université Paris Descartes, 75940, Paris, France.
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Cohen TR, Hazell TJ, Vanstone CA, Rodd C, Weiler HA. Bone Health is Maintained, While Fat Mass is Reduced in Pre-pubertal Children with Obesity Participating in a 1-Year Family-Centered Lifestyle Intervention. Calcif Tissue Int 2017; 101:612-622. [PMID: 28866763 DOI: 10.1007/s00223-017-0318-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 08/23/2017] [Indexed: 12/18/2022]
Abstract
Diet and physical activity (PA) influence bone health in children. This study tested whether increasing milk and milk products and weight-bearing types of PA favorably changed bone outcomes assessed by dual-energy X-ray absorptiometry (DXA) and bone biomarkers in children with obesity participating in a 1-year family-centered lifestyle intervention. Children were randomized to one of three groups: Control (Ctrl; no intervention), Standard treatment (StnTx: two servings milk and milk products/day; meet PA guidelines plus weight-bearing PA three times/week), or Modified treatment (ModTx: four servings milk and milk products/day; meet PA guidelines plus daily weight-bearing PA). Baseline and 12-month measurements included DXA scans for whole body (WB), lumbar spine (LS), lumbar lateral spine (LLS), and ultra-distal (UD) ulna + radius for bone mineral content (BMC), areal bone mineral density (aBMD) and BMD z-scores. Fat mass index (FMI), fat-free mass index (FFMI), and biomarkers of bone metabolism were assessed. Seventy-eight children 6-8 years old were recruited (mean body mass index for-age z-score: 3.3 ± 1.2). Compared to baseline, all groups increased BMC of WB, LS, and LLS (p < 0.001), whereas only StnTx increased UD ulna + radius BMC at 12 months (p < 0.05). At 12 months, WB-BMD z-scores were significantly lower in Ctrl (p < 0.05), whereas WB and LLS aBMD increased in StnTx and ModTx (p < 0.001) but not in Ctrl. All groups increased FFMI (p < 0.001), while only Ctrl increased FMI (p < 0.001). Bone biomarkers did not change over time. Participating in a family-centered lifestyle intervention based on Canadian diet and PA guidelines maintained bone health in obese children.
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Affiliation(s)
- Tamara R Cohen
- School of Human Nutrition, Macdonald Campus, McGill University, 21,111 Lakeshore Rd, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Tom J Hazell
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON, N2L 3C5, Canada
| | - Catherine A Vanstone
- School of Human Nutrition, Macdonald Campus, McGill University, 21,111 Lakeshore Rd, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Celia Rodd
- Children's Hospital, University of Manitoba, FW302-685 William Ave, Winnipeg, MB, R3E 0Z2, Canada
| | - Hope A Weiler
- School of Human Nutrition, Macdonald Campus, McGill University, 21,111 Lakeshore Rd, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada.
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Maridas DE, DeMambro VE, Le PT, Mohan S, Rosen CJ. IGFBP4 Is Required for Adipogenesis and Influences the Distribution of Adipose Depots. Endocrinology 2017; 158:3488-3500. [PMID: 28938423 PMCID: PMC5659704 DOI: 10.1210/en.2017-00248] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 07/24/2017] [Indexed: 01/29/2023]
Abstract
Insulinlike growth factor (IGF) I induces adipogenesis in vitro. IGF-binding protein 4 (IGFBP4) is highly expressed in adipocytes and osteoblasts and is inhibitory of IGFs in vitro. We previously reported that Igfbp4 null mice (Igfbp4-/-) had decreased fat proportions at 8 and 16 weeks of age. However, the mechanism leading to the reduced adiposity remains unknown. The purpose of this study was to elucidate how IGFBP4 mediates adipose tissue development in vivo. Our results showed that inguinal and gonadal white adipose tissue (gWAT) from Igfbp4-/- mice had decreased weights and Pparγ expression. Cultures of primary bone marrow stromal cells (BMSCs) and ear mesenchymal stem cells (eMSCs) from mutant mice showed reduced adipogenesis. Both BMSCs and eMSC had a strong induction of Igfbp4 expression during adipogenesis. Furthermore, the increase in phosphorylated Akt (p-Akt), a downstream target of IGF-I signaling, in wild-type cells, was blunted in mutant eMSCs. On a high-fat diet (HFD) there were sexual differences in adipocyte expansion of Igfbp4-/- mice. Mutant males gained weight by expanding their white fat depots. However, Igfbp4-/- female mice were protected against diet-induced obesity. Ovariectomized Igfbp4-/- female mice gained weight in a manner similar to that seen in ovariectomized controls. Thus, Igfbp4 is required for inguinal fat expansion in female mice but not in male mice. However, gWAT expansion, which is prevented by estrogen during HFD, does not require Igfbp4.
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Affiliation(s)
- David E. Maridas
- Maine Medical Center Research Institute, Scarborough, Maine 04074
| | | | - Phuong T. Le
- Maine Medical Center Research Institute, Scarborough, Maine 04074
| | - Subburaman Mohan
- Veterans Affairs Loma Linda Healthcare System, Loma Linda, California 92357
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