1
|
Roghair RD, Colaizy TT, Steinbrekera B, Vass RA, Hsu E, Dagle D, Chatmethakul T. Neonatal Leptin Levels Predict the Early Childhood Developmental Assessment Scores of Preterm Infants. Nutrients 2023; 15:nu15081967. [PMID: 37111184 PMCID: PMC10144252 DOI: 10.3390/nu15081967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/18/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
Preterm infants have low circulating levels of leptin, a key trophic hormone that influences growth and development. While the clinical importance of prematurity-associated leptin deficiency is undefined, recent preclinical and clinical investigations have shown that targeted enteral leptin supplementation can normalize neonatal leptin levels. We tested the hypothesis that, independent of growth velocity, prematurity-related neonatal leptin deficiency predicts adverse cardiovascular and neurodevelopmental outcomes. In a planned 2-year longitudinal follow-up of 83 preterm infants born at 22 to 32 weeks' gestation, we obtained blood pressures from 58 children and the Ages & Stages Questionnaire (ASQ-3) for 66 children. Based on univariate analysis, blood pressures correlated with gestational age at birth (R = 0.30, p < 0.05) and weight gain since discharge (R = 0.34, p < 0.01). ASQ-3 scores were significantly higher in female than male children. Utilizing best subset regression with Mallows' Cp as the criterion for model selection, higher systolic blood pressure was predicted by rapid postnatal weight gain, later gestation at delivery and male sex (Cp = 3.0, R = 0.48). Lower ASQ-3 was predicted by lower leptin levels at 35 weeks postmenstrual age, earlier gestation at delivery and male sex (Cp = 2.9, R = 0.45). Children that had leptin levels above 1500 pg/mL at 35 weeks postmenstrual age had the highest ASQ-3 scores at 2 years. In conclusion, independent of growth velocity, higher leptin levels at 35 weeks' gestation are associated with better developmental assessment scores in early childhood. While longer-term follow-up of a larger cohort is needed, these findings support investigations that have suggested that targeted neonatal leptin supplementation could improve the neurodevelopmental outcomes of preterm infants.
Collapse
Affiliation(s)
- Robert D Roghair
- Department of Pediatrics, University of Iowa Stead Family Children's Hospital, Iowa City, IA 52242, USA
| | - Tarah T Colaizy
- Department of Pediatrics, University of Iowa Stead Family Children's Hospital, Iowa City, IA 52242, USA
| | - Baiba Steinbrekera
- Department of Pediatrics, University of South Dakota, Sioux Falls, SD 57105, USA
| | - Réka A Vass
- Department of Obstetrics and Gynecology, Medical School University of Pécs, 7624 Pécs, Hungary
| | - Erica Hsu
- Department of Pediatrics, University of Iowa Stead Family Children's Hospital, Iowa City, IA 52242, USA
| | - Daniel Dagle
- Department of Pediatrics, University of Iowa Stead Family Children's Hospital, Iowa City, IA 52242, USA
| | - Trassanee Chatmethakul
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| |
Collapse
|
2
|
Postnatal Leptin Levels Correlate with Breast Milk Leptin Content in Infants Born before 32 Weeks Gestation. Nutrients 2022; 14:nu14245224. [PMID: 36558383 PMCID: PMC9782260 DOI: 10.3390/nu14245224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/01/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Perinatal leptin deficiency and reduced intake of mother’s milk may contribute to the development of childhood obesity. Preterm infants have reduced leptin production, and they are at heightened risk of neonatal leptin deficiency. Because fresh human milk contains significantly more leptin than donor milk, we used a cross-over design to determine if blood leptin levels in maternal milk-fed preterm infants fall during conversion to donor human milk. Infants born between 22 0/7 and 31 6/7 weeks gestation on exclusive maternal milk feedings were enrolled into a 21-day cross-over trial. On days 1−7 and 15−21, infants were fed maternal milk, and on days 8−14, infants were fed donor milk. On day 1, study infants had a mean postmenstrual age of 33 weeks. Plasma leptin correlated with milk leptin, and leptin levels in maternal milk far exceed the leptin levels of donor milk. Plasma leptin did not increase during donor milk administration, but it did following resumption of maternal milk (p < 0.05). In this crossover trial, preterm infant blood leptin levels correlated with milk leptin content. This suggests that preterm infants can enterally absorb leptin from human milk, and leptin-rich breast milk may be a targeted therapy for the prevention of obesity.
Collapse
|
3
|
Carvalho E, Adams SH, Børsheim E, Blackburn ML, Ono-Moore KD, Cotter M, Bowlin AK, Yeruva L. Neonatal diet impacts liver mitochondrial bioenergetics in piglets fed formula or human milk. BMC Nutr 2020; 6:13. [PMID: 32318270 PMCID: PMC7158137 DOI: 10.1186/s40795-020-00338-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 02/26/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Neonatal diet impacts many physiological systems and can modify risk for developing metabolic disease and obesity later in life. Less well studied is the effect of postnatal diet (e.g., comparing human milk (HM) or milk formula (MF) feeding) on mitochondrial bioenergetics. Such effects may be most profound in splanchnic tissues that would have early exposure to diet-associated or gut microbe-derived factors. METHODS To address this question, we measured ileal and liver mitochondrial bioenergetics phenotypes in male piglets fed with HM or MF from day 2 to day 21 age. Ileal and liver tissue were processed for mitochondrial respiration (substrate only [pyruvate, malate, glutamate], substrate + ADP, and proton "leak" post-oligomycin; measured by Oroboros methods), mitochondrial DNA (mtDNA) and metabolically-relevant gene expression analyses. RESULTS No differences between the diet groups were observed in mitochondrial bioenergetics indices in ileal tissue. In contrast, ADP-dependent liver Complex I-linked OXPHOS capacity and Complex I + II-linked OXPHOS capacity were significantly higher in MF animals relative to HM fed piglets. Interestingly, p53, Trap1, and Pparβ transcript abundances were higher in MF-fed relative to HM-fed piglets in the liver. Mitochondrial DNA copy numbers (normalized to nuclear DNA) were similar within-tissue regardless of postnatal diet, and were ~ 2-3 times higher in liver vs. ileal tissue. CONCLUSION While mechanisms remain to be identified, the data indicate that neonatal diet can significantly impact liver mitochondrial bioenergetics phenotypes, even in the absence of a change in mtDNA abundance. Since permeabilized liver mitochondrial respiration was increased in MF piglets only in the presence of ADP, it suggests that formula feeding led to a higher ATP turnover. Specific mechanisms and signals involved with neonatal diet-associated differences in liver bioenergetics remain to be elucidated.
Collapse
Affiliation(s)
- Eugenia Carvalho
- Department of Geriatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Research Institute, Little Rock, AR USA
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Sean H. Adams
- Department of Pediatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| | - Elisabet Børsheim
- Department of Geriatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Research Institute, Little Rock, AR USA
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| | - Michael L. Blackburn
- Department of Pediatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| | - Kikumi D. Ono-Moore
- Department of Pediatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| | - Matthew Cotter
- Arkansas Children’s Research Institute, Little Rock, AR USA
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| | - Anne K. Bowlin
- Department of Pediatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| | - Laxmi Yeruva
- Arkansas Children’s Research Institute, Little Rock, AR USA
- Department of Pediatrics, University of Arkansas for Medical Sciences (UAMS), Little Rock, USA
- Arkansas Children’s Nutrition Center, 15 Children’s Way, Little Rock, AR 72202 USA
| |
Collapse
|
4
|
Amissah E, Lin L, Gamble GD, Crowther CA, Bloomfield FH, Harding JE. Macronutrient Supplements in Preterm and Small-for-Gestational-Age Animals: A Systematic Review and Meta-analysis. Sci Rep 2019; 9:14715. [PMID: 31605011 PMCID: PMC6789152 DOI: 10.1038/s41598-019-51295-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 09/24/2019] [Indexed: 12/20/2022] Open
Abstract
Early macronutrient supplementation in preterm and/or small-for-gestational-age (SGA) infants may improve growth but have detrimental effects on later cardio-metabolic health which may be sex-specific. We systematically reviewed the long-term effects of early macronutrient supplementation in preterm and SGA animals and whether these differ by sex. Using Cochrane Neonatal and SYRCLE methodologies we included random or quasi-random studies that allocated non-human mammals to macronutrient supplements or no supplements between birth and weaning and assessed post-weaning outcomes. We used random-effects models to calculate standardized mean differences (SMD) with 95% confidence intervals (CIs). Six studies provided low to very-low-quality evidence that macronutrient supplementation increased weight in juvenile rats (SMD; 95% CI: 2.13; 1.00, 3.25; 1 study, n = 24), increased leptin concentrations in older adults (1.31; 0.12, 2.51; 1 study, n = 14 male rats), but decreased leptin concentrations in young adults (-1.13; -2.21, -0.05; 1 study, n = 16 female rats) and improved spatial learning and memory (qualitative data; 1 study). There was no evidence of sex-specific effects and no overall effect on length, serum lipids, body composition, HOMA-IR, or blood pressure. Macronutrient supplements may affect later growth, metabolism, and neurodevelopment of preterm and SGA animals, but evidence is limited and low quality.
Collapse
Affiliation(s)
- Emma Amissah
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Luling Lin
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Gregory D Gamble
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | | | | | - Jane E Harding
- Liggins Institute, University of Auckland, Auckland, New Zealand.
| |
Collapse
|
5
|
Larsson MW, Lind MV, Larnkjær A, Due AP, Blom IC, Wells J, Lai CT, Mølgaard C, Geddes DT, Michaelsen KF. Excessive Weight Gain Followed by Catch-Down in Exclusively Breastfed Infants: An Exploratory Study. Nutrients 2018; 10:E1290. [PMID: 30213080 PMCID: PMC6164044 DOI: 10.3390/nu10091290] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/07/2018] [Accepted: 09/10/2018] [Indexed: 12/14/2022] Open
Abstract
Some infants experience excessive weight gain (EWG) during exclusive breastfeeding, but causes and consequences are unknown. The objective was to identify factors associated with early EWG. Infants with EWG (HW-group) were examined at 5, 9 and 18 mo and compared to a breastfed group with normal weight gain (NW-group). Anthropometry, body composition, milk and blood samples, and milk intake were measured. Mean body-mass-index-for-age z-scores (BAZ) increased 1.93 from birth to 5 mo in the HW-group (n = 13) while the NW-group (n = 17) was unchanged (-0.01). The HW-group had 70% more fat mass at 5 mo, and then showed marked catch-down in BAZ from 5 to 18 mo (-0.84). Milk intake at 5⁻6 mo did not differ between the groups. In the HW-group milk-leptin was lower at 5 mo and serum-leptin was considerably higher at 5 and 9 mo compared to the NW-group. Serum-leptin at 5 mo was positively associated with weight-for-age z-score (WAZ) and fat mass and negatively with WAZ change from 5 to 9 mo. In conclusion, breastfed infants with EWG had catch-down growth when other foods were introduced. Low milk-leptin in the HW-group may have stimulated appetite and milk intake when weight gain was high. High serum-leptin in the HW-group suggests early leptin resistance, which could impact cerebral regulation of energy intake. Larger studies are needed to confirm these results.
Collapse
Affiliation(s)
- Melanie W Larsson
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
- Department of Nursing and Nutrition, University College Copenhagen, Sigurdsgade 26, 2200 N, Copenhagen, Denmark.
| | - Mads V Lind
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
| | - Anni Larnkjær
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
| | - Anette P Due
- Department of Nursing and Nutrition, University College Copenhagen, Sigurdsgade 26, 2200 N, Copenhagen, Denmark.
| | - Irina C Blom
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
| | - Jonathan Wells
- UCL Institute of Child Health, University College London, 30 Guilford St, London WC1N 1EH, UK.
| | - Ching T Lai
- School of molecular Sciences, University of Western Australia, 35 Stirling Hwy, Crawley WA 6009, Australia.
| | - Christian Mølgaard
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
| | - Donna T Geddes
- School of molecular Sciences, University of Western Australia, 35 Stirling Hwy, Crawley WA 6009, Australia.
| | - Kim F Michaelsen
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg, Denmark.
| |
Collapse
|
6
|
Larnkjær A, Ong KK, Carlsen EM, Ejlerskov KT, Mølgaard C, Michaelsen KF. The Influence of Maternal Obesity and Breastfeeding on Infant Appetite- and Growth-Related Hormone Concentrations: The SKOT Cohort Studies. Horm Res Paediatr 2018; 90:28-38. [PMID: 29961064 PMCID: PMC6773597 DOI: 10.1159/000490114] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 05/15/2018] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND/AIMS Exposure to obesity during pregnancy may lead to adverse changes in the offspring's metabolic profile. We compared appetite- and growth-related hormones in a cohort of infants born to obese mothers (SKOT-II) with infants born mainly to nonobese mothers (SKOT-I). METHODS Infants from SKOT-I (n = 273) and SKOT-II (n = 132) were examined including anthropometric measurements and blood samples analyzed for glucose, insulin, insulin-like growth factor-I (IGF-I), adiponectin, and leptin. Information on breastfeeding and parental characteristics were also collected. RESULTS At 9 months of age, SKOT-II infants were 3.6% heavier and 1.2% longer than SKOT-I infants even though their mothers were shorter. There was no difference in body mass index (BMI). SKOT-II infants had higher levels of insulin, adiponectin, and leptin but lower levels of IGF-I compared to SKOT-I infants (all p ≤ 0.015). These differences remained, except for leptin, when adjusted for current weight. Breastfeeding versus nonbreastfeeding at 9 months was associated with lower concentrations of all hormones (all p ≤ 0.003). In adjusted models, maternal BMI at 9 months was positively associated with insulin and adiponectin and negatively with IGF-I. CONCLUSIONS Pre-pregnancy obesity confers symmetrically larger infant body size and higher levels of most growth- and appetite-related hormones but surprisingly lower levels of IGF-I, suggesting other possible infant growth-promoting effects through insulin.
Collapse
Affiliation(s)
- Anni Larnkjær
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Denmark
| | - Ken K Ong
- MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge, Cambridge, UK,Department of Paediatrics, University of Cambridge, Cambridge, UK
| | - Emma M Carlsen
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Denmark,Department of Pediatrics, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Katrine T Ejlerskov
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Denmark
| | - Christian Mølgaard
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Denmark
| | - Kim F. Michaelsen
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Denmark
| |
Collapse
|
7
|
Garcia IJP, Cézar JS, Lemos BS, Silva LN, Ribeiro RIMDA, Santana CC, Grillo LAM, Pinto FCH, Buzelle SL, Cortes VF, Santos HDL, Santos MESMD, Barbosa LA. Effects of high fat diet on kidney lipid content and the Na,K-ATPase activity. BRAZ J PHARM SCI 2018. [DOI: 10.1590/s2175-97902018000117165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
|
8
|
Kałużna-Czaplińska J, Gątarek P, Chirumbolo S, Chartrand MS, Bjørklund G. How important is tryptophan in human health? Crit Rev Food Sci Nutr 2017; 59:72-88. [PMID: 28799778 DOI: 10.1080/10408398.2017.1357534] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Tryptophan (Trp) is an amino acid and an essential component of the human diet. It plays a crucial role in many metabolic functions. Clinicians can use Trp levels in the course of diagnosing various metabolic disorders and the symptoms associated with those diseases. Furthermore, supplementation with this amino acid is considered in the treatment of depression and sleep disorders, mainly due to the Trp relationship with the synthesis of serotonin (5-HT) and melatonin. It is also used in helping to resolve cognitive disorders, anxiety, or neurodegenerative diseases. Reduced secretion of serotonin is associated with autism spectrum disorder, obesity, anorexia and bulimia nervosa, and other diseases presenting peripherals symptoms. The literature strongly suggests that Trp has a significant role in the correct functionality of the brain-gut axis and immunology. This information leads to the consideration of Trp as an essential dietary component due to its role in the serotonin pathway. A reduced availability of Trp in diet and nutraceutical supplementation should be considered with greater concern than one might expect. This paper constitutes a review of the more salient aspects gleaned from the current knowledge base about the role of Trp in diseases, associated nutritional disorders, and food science, in general.
Collapse
Affiliation(s)
- Joanna Kałużna-Czaplińska
- a Department of Chemistry, Institute of General and Ecological Chemistry , Lodz University of Technology , Lodz , Poland
| | - Paulina Gątarek
- a Department of Chemistry, Institute of General and Ecological Chemistry , Lodz University of Technology , Lodz , Poland
| | - Salvatore Chirumbolo
- b Department of Neurological and Movement Sciences , University of Verona , Italy
| | | | - Geir Bjørklund
- d Council for Nutritional and Environmental Medicine , Mo i Rana , Norway
| |
Collapse
|
9
|
Savino F, Sardo A, Montanari P, Galliano I, Di Stasio L, Bergallo M, Silvestro L. Polymorphisms in Lep and Lepr Genes in Infants: Correlation with Serum Leptin Values in the First 6 Months of Life. J Am Coll Nutr 2017. [PMID: 28628399 DOI: 10.1080/07315724.2017.1318723] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVE Because several studies indicate that polymorphisms in leptin (Lep) and leptin receptor (Lepr) genes play a central role in determining obesity, we analyzed 2 single nucleotide polymorphisms (SNPs) in the Lep gene (Lep G2548A and A19G) and one in the Lepr gene (Lepr A668G) to verify the effect of the 3 SNPs on leptin concentrations in infancy. METHODS We enrolled 80 healthy Caucasian infants under 6 months of age, who were genotyped for the 3 SNPs with amplification refractory mutation system-mismatch amplification mutation assay (ARMS-MAMA) real-time polymerase chain reaction (PCR). Serum leptin values were measured with a radioimmunoassay method. Statistical significance was set at p < 0.05. RESULTS There were no significant differences between individually analyzed leptin polymorphisms Lep G2548A and A19G and serum leptin levels (p > 0.05). Because we found that Lep G2548A and A19G are in linkage disequilibrium on chromosome 7, we performed the haplotype analysis for Lep G2548A and Lep A19G. We obtained higher serum leptin levels in infants with the GG/GG haplotype (p < 0.05). Regarding receptor, we found higher leptin levels in GG-genotype infants for Lepr A668G (p < 0.001). Considering the 3 SNPs together, we found higher serum leptin values in GG/GG-GG infants (LepG2548A/A19G-Lepr A668G; p < 0.001). CONCLUSION We obtained higher serum leptin levels in infants with the GG genotype for Lepr A668G, with haplotype GG/GG for Lep G2548A/A19G, and with GG/GG-GG (LepG2548A/A19G-Lepr A668G); thus, it seems that the genotype GG could be a protector against obesity development in infancy and adulthood. Moreover, these data confirm that not variations in the Lep gene as well as in the Lepr gene could play a role in weight gain. Further studies are needed to evaluate the role of genetics and the environment in a predisposition toward obesity later in life.
Collapse
Affiliation(s)
- Francesco Savino
- a Department of Pediatrics , Azienda Ospedaliera Universitaria Città della Salute e della Scienza di Torino , Turin , Italy
| | - Allegra Sardo
- a Department of Pediatrics , Azienda Ospedaliera Universitaria Città della Salute e della Scienza di Torino , Turin , Italy
| | - Paola Montanari
- b Dipartimento delle Scienze di Sanità Pubblica e Pediatriche , Università degli Studi di Torino, Scuola di Medicina , Turin , Italy
| | - Ilaria Galliano
- b Dipartimento delle Scienze di Sanità Pubblica e Pediatriche , Università degli Studi di Torino, Scuola di Medicina , Turin , Italy
| | - Liliana Di Stasio
- c Department of Agricultural , Forest and Food Science, University of Torino , Turin , Italy
| | - Massimiliano Bergallo
- b Dipartimento delle Scienze di Sanità Pubblica e Pediatriche , Università degli Studi di Torino, Scuola di Medicina , Turin , Italy
| | - Leandra Silvestro
- b Dipartimento delle Scienze di Sanità Pubblica e Pediatriche , Università degli Studi di Torino, Scuola di Medicina , Turin , Italy
| |
Collapse
|
10
|
Savino F, Rossi L, Di Stasio L, Galliano I, Montanari P, Bergallo M. Mismatch Amplification Mutation Assay Real-Time PCR Analysis of the Leptin Gene G2548A and A19G Polymorphisms and Serum Leptin in Infancy: A Preliminary Investigation. Horm Res Paediatr 2017; 85:318-24. [PMID: 27008407 DOI: 10.1159/000444484] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 02/05/2016] [Indexed: 11/19/2022] Open
Abstract
Leptin is a hormone that regulates food intake and energy metabolism. Its coding gene (LEP) is one of the most promising candidates for obesity. Although some studies have detected associations of different single nucleotide polymorphisms (SNPs) in the LEP gene with serum leptin levels and obesity-related traits, the results are still conflicting. We investigated two SNPs to find relationships with leptin concentrations. Thirty healthy Caucasian infants younger than 6 months were genotyped for the SNPs G2548A and A19G with polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and amplification refractory mutation system-mismatch amplification mutation assay (ARMS- MAMA) real-time PCR, and serum leptin concentrations were measured with a radioimmunoassay method. Considering the significant linkage disequilibrium observed between the two SNPs, we divided the sample according to the number of GG haplotypes and observed that individuals homozygous for the GG haplotype had higher serum leptin levels in early infancy than the others. Although these preliminary results are based on a limited sample, they suggest that the genetic background seems to play a role in modulating leptin levels in infancy, but changes in leptin levels over infancy and their correlation with obesity need to be further explored. We describe an ARMS-MAMA real-time PCR procedure which could be profitably applied in routine genetic screening.
Collapse
Affiliation(s)
- Francesco Savino
- Regina Margherita Children's Hospital, Cittx00E0; della Salute e della Scienza di Torino, Turin, Italy
| | | | | | | | | | | |
Collapse
|
11
|
Steinbrekera B, Roghair R. Modeling the impact of growth and leptin deficits on the neuronal regulation of blood pressure. J Endocrinol 2016; 231:R47-R60. [PMID: 27613336 PMCID: PMC5148679 DOI: 10.1530/joe-16-0273] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 09/08/2016] [Indexed: 12/15/2022]
Abstract
The risk of hypertension is increased by intrauterine growth restriction (IUGR) and preterm birth. In the search for modifiable etiologies for this life-threatening cardiovascular morbidity, a number of pathways have been investigated, including excessive glucocorticoid exposure, nutritional deficiency and aberration in sex hormone levels. As a neurotrophic hormone that is intimately involved in the cardiovascular regulation and whose levels are influenced by glucocorticoids, nutritional status and sex hormones, leptin has emerged as a putative etiologic and thus a therapeutic agent. As a product of maternal and late fetal adipocytes and the placenta, circulating leptin typically surges late in gestation and declines after delivery until the infant consumes sufficient leptin-containing breast milk or accrues sufficient leptin-secreting adipose tissue to reestablish the circulating levels. The leptin deficiency seen in IUGR infants is a multifactorial manifestation of placental insufficiency, exaggerated glucocorticoid exposure and fetal adipose deficit. The preterm infant suffers from the same cascade of events, including separation from the placenta, antenatal steroid exposure and persistently underdeveloped adipose depots. Preterm infants remain leptin deficient beyond term gestation, rendering them susceptible to neurodevelopmental impairment and subsequent cardiovascular dysregulation. This pathologic pathway is efficiently modeled by placing neonatal mice into atypically large litters, thereby recapitulating the perinatal growth restriction-adult hypertension phenotype. In this model, neonatal leptin supplementation restores the physiologic leptin surge, attenuates the leptin-triggered sympathetic activation in adulthood and prevents leptin- or stress-evoked hypertension. Further pathway interrogation and clinical translation are needed to fully test the therapeutic potential of perinatal leptin supplementation.
Collapse
MESH Headings
- Adiposity
- Adult
- Animals
- Animals, Newborn
- Disease Models, Animal
- Female
- Fetal Growth Retardation/drug therapy
- Fetal Growth Retardation/metabolism
- Fetal Growth Retardation/physiopathology
- Hormone Replacement Therapy
- Humans
- Hypertension/etiology
- Hypertension/metabolism
- Hypertension/prevention & control
- Hypothalamus/metabolism
- Infant, Newborn
- Infant, Premature
- Infant, Premature, Diseases/drug therapy
- Infant, Premature, Diseases/metabolism
- Infant, Premature, Diseases/physiopathology
- Leptin/deficiency
- Leptin/genetics
- Leptin/metabolism
- Leptin/therapeutic use
- Male
- Mice
- Nerve Tissue Proteins/agonists
- Nerve Tissue Proteins/metabolism
- Neurodevelopmental Disorders/drug therapy
- Neurodevelopmental Disorders/metabolism
- Neurodevelopmental Disorders/physiopathology
- Pregnancy
- Receptors, Leptin/agonists
- Receptors, Leptin/metabolism
- Recombinant Proteins/metabolism
- Recombinant Proteins/therapeutic use
- Signal Transduction
Collapse
Affiliation(s)
- Baiba Steinbrekera
- Stead Family Department of PediatricsCarver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Robert Roghair
- Stead Family Department of PediatricsCarver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| |
Collapse
|
12
|
Mother and Infant Body Mass Index, Breast Milk Leptin and Their Serum Leptin Values. Nutrients 2016; 8:nu8060383. [PMID: 27338468 PMCID: PMC4924223 DOI: 10.3390/nu8060383] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/15/2016] [Accepted: 06/17/2016] [Indexed: 12/22/2022] Open
Abstract
Purpose: This study investigates correlations between mother and infant Body Mass Index (BMI), their serum leptin values and breast milk leptin concentration in early infancy. Subjects and Methods: We determined serum leptin values in 58 healthy infants and leptin values in their mothers’ breast milk, using radioimmunoassay (RIA). Infant and maternal anthropometrics were measured. Results: Median leptin concentration was 3.9 ng/mL (interquartile range (IQR): 2.75) in infant serum, 4.27 ng/mL (IQR: 5.62) in maternal serum and 0.89 ng/mL (IQR: 1.32) in breast milk. Median maternal BMI and weight were 24 kg/m2 (IQR: 4.41) and 64 kg (IQR: 15). Median infant BMI was 15.80 kg/cm2 (IQR: 4.02), while average weight was 5.130 kg (IQR: 1.627). Infants serum leptin values positively correlated with infants’ BMI (p = 0.001; r = 0.213) and breast milk leptin (p = 0.03; r = 0.285). Maternal serum leptin values positively correlated with maternal BMI (p = 0.000, r = 0.449) and breast milk leptin ones (p = 0.026; r = 0.322). Conclusion: Breast milk leptin and maternal BMI could influence infant serum leptin values. Further studies are needed to better elucidate the role of genetics and environment on infant leptin production and risk of obesity later in life.
Collapse
|
13
|
Savino F, Rossi L, Benetti S, Petrucci E, Sorrenti M, Silvestro L. Serum reference values for leptin in healthy infants. PLoS One 2014; 9:e113024. [PMID: 25415449 PMCID: PMC4240544 DOI: 10.1371/journal.pone.0113024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 10/22/2014] [Indexed: 11/18/2022] Open
Abstract
Objective Reports on leptin concentrations in pediatric populations lack reference values for infants in the first months of life. Our study was conducted on healthy full-term infants between 2002 and 2012 to determine serum leptin reference values in subjects less than 18 months old. Methods Routine outpatient blood tests for serum leptin were performed on 317 infants using a radioimmunoassay method. The median and 10th–90th percentiles were calculated to obtain reference values using quantile regression. Values established in this study were compared with another independent cohort of 110 infants. Results The median (IQR) serum leptin concentration in the infants was 2.37 (3.26) ng/ml (n = 317). The median leptin concentration was 2.81 (3.49) ng/ml (n = 202) in infants younger than 6 months of age, 1.44 (2.27) ng/ml (n = 59) in infants between 6–12 months of age and 1.77 (2.05) ng/ml (n = 56) in infants between 12–18 months of age. We obtained leptin reference values based on age by estimating the lower and upper percentiles. In the entire cohort, the median (IQR) leptin concentration was 2.22 (3.11) ng/ml in males (n = 168) and 2.60 (3.32) ng/ml in females (n = 149). According to the type of feeding median serum leptin concentration was higher in breast-fed infants (n = 188) than in formula-fed infants (n = 129) (2.63 (3.34) ng/ml vs. 2.12 (2.77) ng/ml; p<0.05). Conclusions Our data revealed no gender difference in leptin concentration in early infancy. After 6 months of life, leptin concentrations decreased slightly. We used a large cohort to confirm that breast-fed infants had significantly higher serum leptin levels than formula-fed infants during the first 6 months of life, although this difference disappeared later in life. In this study, we defined the leptin reference range in healthy infants in the first 18 months of life according to the Clinical and Laboratory Standards Institute (CLSI).
Collapse
Affiliation(s)
- Francesco Savino
- Department of Paediatrics, University of Turin, Regina Margherita Children's Hospital, Turin, Italy
- * E-mail:
| | - Lorenza Rossi
- Department of Paediatrics, University of Turin, Regina Margherita Children's Hospital, Turin, Italy
| | - Stefania Benetti
- Department of Paediatrics, University of Turin, Regina Margherita Children's Hospital, Turin, Italy
| | - Elisa Petrucci
- Department of Paediatrics, University of Turin, Regina Margherita Children's Hospital, Turin, Italy
| | - Miriam Sorrenti
- Department of Paediatrics, University of Turin, Regina Margherita Children's Hospital, Turin, Italy
| | - Leandra Silvestro
- Department of Paediatrics, University of Turin, Regina Margherita Children's Hospital, Turin, Italy
| |
Collapse
|
14
|
Ruchat SM, Bouchard L, Hivert MF. Early Infant Nutrition and Metabolic Programming: What Are the Potential Molecular Mechanisms? Curr Nutr Rep 2014. [DOI: 10.1007/s13668-014-0088-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
15
|
Tijhuis MJ, Doets EL, Vonk Noordegraaf‐Schouten M. Extensive literature search and review as preparatory work for the evaluation of the essential composition of infant and follow‐on formulae and growing‐up milk. ACTA ACUST UNITED AC 2014. [DOI: 10.2903/sp.efsa.2014.en-551] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- MJ Tijhuis
- Pallas health research and consultancy the Netherlands
| | - EL Doets
- Pallas health research and consultancy the Netherlands
| | | |
Collapse
|