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Moyo GT, Thomas-Jackson SC, Childress A, Dawson J, Thompson LD, Oldewage-Theron W. Chrononutrition and Breast Milk: A Review of the Circadian Variation of Hormones Present in Human Milk. CLINICAL LACTATION 2021. [DOI: 10.1891/clinlact-d-20-00035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
IntroductionBreast milk contains a wide range of hormones, nutrients, and bioactive compounds. Chrononutrition looks at the interaction between food, both meal timing and meal composition, and circadian rhythms.MethodThis review is a continuation on series on chrononutrition and breast milk. All human studies published in English were included regardless of location or year of publication.ResultsThis review identifies the hormonal circadian variation researched in breast milk to date for melatonin, cortisol, cortisone, leptin, and insulin.ConclusionThe circadian variation observed in some hormones reinforces the superiority of breast milk over formula milk. Melatonin has been the most studied, but more research for all the hormones is needed due to various gaps in the literature and varying levels of study quality. There is insufficient evidence to make recommendations specifically targeting the lactating mother, but we identify and recommend several ideas for future research.
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Tahir MJ, Ejima K, Li P, Demerath EW, Allison DB, Fields DA. Associations of breastfeeding or formula feeding with infant anthropometry and body composition at 6 months. MATERNAL AND CHILD NUTRITION 2020; 17:e13105. [PMID: 33145993 PMCID: PMC7988875 DOI: 10.1111/mcn.13105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 09/14/2020] [Accepted: 10/07/2020] [Indexed: 12/16/2022]
Abstract
The objective of this study was to investigate the associations of mode of feeding with infant anthropometric and body composition variables at 6 months of age. We studied 259 infants whose exclusive mode of feeding (breast or formula) to 1 month was confirmed. Standard anthropometric characteristics of the infants (weight, length and weight‐for‐length z scores) were obtained, and body composition (total fat mass, fat‐free mass, trunk fat mass and body fat percent) was measured using dual‐energy X‐ray absorptiometry (DXA) at 6 months (±12 days). General linear models were used to test the associations of mode of feeding with infant anthropometric and body composition variables at 6 months after adjustment for maternal and infant covariates. In this cohort of predominantly breastfed, White infants of highly educated mothers, fat‐free mass was lower (P = .002), and trunk fat mass (P = .032) and body fat percent (P < .001) were greater in breastfed infants than in formula‐fed infants at 6 months of age. After adjustment for covariates, total fat‐free mass was significantly lower (β = −372 g, [SE = 125, P = .003]), and body fat percent was significantly greater (β = 3.30, [SE = 0.91, P < .001]) in breastfed infants than in formula‐fed infants. No other significant associations were observed. These findings support those of previous studies reporting greater fat‐free mass in formula‐fed infants during the first 6 months of life. Additional research is warranted to explore whether differences in infant body composition by mode of feeding persist throughout the life course and to assess causality.
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Affiliation(s)
- Muna J Tahir
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Keisuke Ejima
- Department of Epidemiology and Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, Indiana, USA.,Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - Peng Li
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama, USA.,School of Nursing, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ellen W Demerath
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - David B Allison
- Department of Epidemiology and Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, Indiana, USA
| | - David A Fields
- Department of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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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.
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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
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Kwon MR, Cress E, Clark WA, Alamian A, Lu Y, Peterson JM. The adipokine C1q TNF related protein 3 (CTRP3) is elevated in the breast milk of obese mothers. PeerJ 2018. [PMID: 29527418 PMCID: PMC5842766 DOI: 10.7717/peerj.4472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Background C1q TNF related protein 3 (CTRP3) is a relatively novel hormonal factor primarily derived from adipose tissue and has anti-diabetic properties. To determine if CTRP3 could play a role in early childhood development, the purpose of this study was to establish the presence of CTRP3 in breast milk (BM) and to determine whether CTRP3 levels were correlated with pregravid obesity status of the mother. Methods Breast milk was collected from breast-feeding mothers who had a pregravid body mass index (BMI) classification of normal weight (BMI 18-25 kg/m2, n = 23) or obese (BMI > 30 kg/m2, n = 14). Immunoprecipitation followed by immunoblot analysis confirmed the presence of CTRP3 in BM. The concentration of CTRP3 in BM samples was determined by ELISA. Additional bioactive components were also measured by commercially available assays: ghrelin, insulin, leptin, adiponectin, interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α), and glucose. Bioactive components in normal weight and obese mothers were compared using unpaired t-test (parametric) and Mann-Whitney U-test (non-parametric), as appropriate. Results The primary findings of this study are that the adipokine CTRP3 is present in BM and CTRP3 levels are increased with pregravid obesity. Additionally, this study independently confirmed previous work that BM from obese mothers has a higher concentration of insulin and leptin. Further, no differences were observed in BM between obese and normal weight mothers in ghrelin, adiponectin, IL-6, TNF-α, or glucose levels. Conclusion This study identified a novel factor in BM, CTRP3, and showed that BM CTRP3 levels higher in obese mothers. Because of the purported insulin sensitizing effect of CTRP3, it is possible that the elevated levels of CTRP3 in the BM of obese mothers may offset negative effects of elevated leptin and insulin levels in the BM of obese mothers. Future studies will need to be conducted to determine the relevance of CTRP3 in BM and to examine the presence of other adipose tissue-derived hormonal factors.
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Affiliation(s)
- Megan R Kwon
- Department of Allied Health Sciences, College of Clinical and Rehabilitative Health Sciences, East Tennessee State University, Johnson City, TN, USA
| | - Eileen Cress
- James H. Quillen VA Medical Center, Mountain Home, TN, USA
| | - W Andrew Clark
- Department of Allied Health Sciences, College of Clinical and Rehabilitative Health Sciences, East Tennessee State University, Johnson City, TN, USA
| | - Arsham Alamian
- Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, Johnson City, TN, USA
| | - Yongke Lu
- Department of Health Sciences, College of Public Health, East Tennessee State University, Johnson City, TN, USA
| | - Jonathan M Peterson
- Department of Health Sciences, College of Public Health, East Tennessee State University, Johnson City, TN, USA
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Kugananthan S, Gridneva Z, Lai CT, Hepworth AR, Mark PJ, Kakulas F, Geddes DT. Associations between Maternal Body Composition and Appetite Hormones and Macronutrients in Human Milk. Nutrients 2017; 9:E252. [PMID: 28282925 PMCID: PMC5372915 DOI: 10.3390/nu9030252] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 02/18/2017] [Accepted: 03/07/2017] [Indexed: 12/18/2022] Open
Abstract
Human milk (HM) appetite hormones and macronutrients may mediate satiety in breastfed infants. This study investigated associations between maternal adiposity and concentrations of HM leptin, adiponectin, protein and lactose, and whether these concentrations and the relationship between body mass index and percentage fat mass (%FM) in a breastfeeding population change over the first year of lactation. Lactating women (n = 59) provided milk samples (n = 283) at the 2nd, 5th, 9th and/or 12th month of lactation. Concentrations of leptin, adiponectin, total protein and lactose were measured. Maternal %FM was measured using bioimpedance spectroscopy. Higher maternal %FM was associated with higher leptin concentrations in both whole (0.006 ± 0.002 ng/mL, p = 0.008) and skim HM (0.005 ± 0.002 ng/mL, p = 0.007), and protein (0.16 ± 0.07 g/L, p = 0.028) concentrations. Adiponectin and lactose concentrations were not associated with %FM (0.01 ± 0.06 ng/mL, p = 0.81; 0.08 ± 0.11 g/L, p = 0.48, respectively). Whole milk concentrations of adiponectin and leptin did not differ significantly over the first year of lactation. These findings suggest that the level of maternal adiposity during lactation may influence the early appetite programming of breastfed infants by modulating concentrations of HM components.
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Affiliation(s)
- Sambavi Kugananthan
- School of Human Sciences, The University of Western Australia, Crawley WA 6009, Australia.
- School of Molecular Sciences, The University of Western Australia, Crawley WA 6009, Australia.
| | - Zoya Gridneva
- School of Molecular Sciences, The University of Western Australia, Crawley WA 6009, Australia.
| | - Ching T Lai
- School of Molecular Sciences, The University of Western Australia, Crawley WA 6009, Australia.
| | - Anna R Hepworth
- School of Molecular Sciences, The University of Western Australia, Crawley WA 6009, Australia.
| | - Peter J Mark
- School of Human Sciences, The University of Western Australia, Crawley WA 6009, Australia.
| | - Foteini Kakulas
- School of Molecular Sciences, The University of Western Australia, Crawley WA 6009, Australia.
| | - Donna T Geddes
- School of Molecular Sciences, The University of Western Australia, Crawley WA 6009, Australia.
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Cannon AM, Kakulas F, Hepworth AR, Lai CT, Hartmann PE, Geddes DT. The Effects of Leptin on Breastfeeding Behaviour. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:12340-55. [PMID: 26437426 PMCID: PMC4626972 DOI: 10.3390/ijerph121012340] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/07/2015] [Accepted: 09/23/2015] [Indexed: 11/27/2022]
Abstract
Breastfed infants have a reduced risk of becoming overweight and/or obese later in life. This protective effect has been partly attributed to leptin present in breastmilk. This study investigated 24-h variations of skim milk leptin and its relationship with breastmilk macronutrients and infant breastfeeding patterns. Exclusive breastfeeding mothers of term singletons (n = 19; age 10 ± 5 weeks) collected pre- and post-feed breastmilk samples for every breastfeed over a 24-h period and test-weighed their infants to determine milk intake at every breastfeed over a 24-h period. Samples (n = 454) were analysed for leptin, protein, lactose and fat content. Skim milk leptin concentration did not change with feeding (p = 0.184). However, larger feed volumes (>105 g) were associated with a decrease in post-feed leptin levels (p = 0.009). There was no relationship between the change in leptin levels and change in protein (p = 0.313) or lactose levels (p = 0.587) between pre- and post-feed milk, but there was a trend for a positive association with changes in milk fat content (p = 0.056). Leptin concentration significantly increased at night (p < 0.001) indicating a possible 24-h pattern. Leptin dose (ng) was not associated with the time between feeds (p = 0.232). Further research should include analysis of whole breastmilk and other breastmilk fractions to extend these findings.
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Affiliation(s)
- Anna M Cannon
- School of Chemistry and Biochemistry, Faculty of Science, The University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Foteini Kakulas
- School of Chemistry and Biochemistry, Faculty of Science, The University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Anna R Hepworth
- School of Chemistry and Biochemistry, Faculty of Science, The University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Ching Tat Lai
- School of Chemistry and Biochemistry, Faculty of Science, The University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Peter E Hartmann
- School of Chemistry and Biochemistry, Faculty of Science, The University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Donna T Geddes
- School of Chemistry and Biochemistry, Faculty of Science, The University of Western Australia, Perth, Western Australia 6009, Australia.
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Abstract
Epidemiological surveys indicate that nutrition in infancy is implicated in the long-term tendency to obesity and that a longer duration of breastfeeding is associated with a protective effect against metabolic disorders later in life. However, the precise cause of this association is not well understood. Recent studies on the compounds present in human breast milk have identified various adipokines, including leptin, adiponectin, resistin, obestatin, nesfatin, ghrelin and apelins. Some of these compounds are involved in the regulation of food intake and energy balance. The presence of these adipokines in breast milk suggests that they may be responsible for the regulation of growth in early infancy and that they could influence the energy balance and development of metabolic disorders in childhood and adulthood.
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Affiliation(s)
- Gönül Çatlı
- Katip Çelebi University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey. E-ma-il:
| | - Nihal Olgaç Dündar
- Katip Çelebi University Faculty of Medicine, Department of Pediatric Neurology, İzmir, Turkey
| | - Bumin Nuri Dündar
- Katip Çelebi University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey
,* Address for Correspondence: Katip Çelebi University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey Phone: +90 232 469 6969 E-mail:
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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).
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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
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White SJ, Taylor MJ, Hurt RT, Jensen MD, Poland GA. Leptin-based adjuvants: an innovative approach to improve vaccine response. Vaccine 2013; 31:1666-72. [PMID: 23370154 DOI: 10.1016/j.vaccine.2013.01.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Revised: 01/04/2013] [Accepted: 01/15/2013] [Indexed: 12/22/2022]
Abstract
Leptin is a pleiotropic hormone with multiple direct and regulatory immune functions. Leptin deficiency or resistance hinders the immunologic, metabolic, and neuroendocrinologic processes necessary to thwart infections and their associated complications, and to possibly protect against infectious diseases following vaccination. Circulating leptin levels are proportional to body fat mass. High circulating leptin concentrations, as observed in obesity, are indicative of the development of leptin transport saturation/signaling desensitization. Leptin bridges nutritional status and immunity. Although its role in vaccine response is currently unknown, over-nutrition has been shown to suppress vaccine-induced immune responses. For instance, obesity (BMI ≥30 kg/m(2)) is associated with lower antigen-specific antibody titers following influenza, hepatitis B, and tetanus vaccinations. This suggests that obesity, and possibly saturable leptin levels, are contributing factors to poor vaccine immunogenicity. While leptin-based therapies have not been investigated as vaccine adjuvants thus far, leptin's role in immunity suggests that application of these therapies is promising and worth investigation to enhance vaccine response in people with leptin signaling impairments. This review will examine the possibility of using leptin as a vaccine adjuvant by: briefly reviewing the distribution and signal transduction of leptin and its receptors; discussing the physiology of leptin with emphasis on its immune functions; reviewing the causes of attenuation of leptin signaling; and finally, providing plausible inferences for the innovative use of leptin-based pharmacotherapies as vaccine adjuvants.
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Affiliation(s)
- Sarah J White
- Mayo Clinic Vaccine Research Group, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, United States
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Devlin MJ, Bouxsein ML. Influence of pre- and peri-natal nutrition on skeletal acquisition and maintenance. Bone 2012; 50:444-51. [PMID: 21723972 PMCID: PMC3210869 DOI: 10.1016/j.bone.2011.06.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 05/30/2011] [Accepted: 06/15/2011] [Indexed: 11/29/2022]
Abstract
Early life nutrition has substantial influences on postnatal health, with both under- and overnutrition linked with permanent metabolic changes that alter reproductive and immune function and significantly increase metabolic disease risk in offspring. Since perinatal nutrition depends in part on maternal metabolic condition, maternal diet during gestation and lactation is a risk factor for adult metabolic disease. Such developmental responses may be adaptive, but might also result from constraints on, or pathological changes to, normal physiology. The rising prevalence of both obesity and osteoporosis, and the identification of links among bone, fat, brain, and gut, suggest that obesity and osteoporosis may be related, and moreover that their roots may lie in early life. Here we focus on evidence for how maternal diet during gestation and lactation affects metabolism and skeletal acquisition in humans and in animal models. We consider the effects of overall caloric restriction, and macronutrient imbalances including high fat, high sucrose, and low protein, compared to normal diet. We then discuss potential mechanisms underlying the skeletal responses, including perinatal developmental programming via disruption of the perinatal leptin surge and/or epigenetic changes, to highlight unanswered questions and identify the most critical areas for future research.
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Affiliation(s)
- M J Devlin
- Center for Advanced Orthopedic Studies, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA.
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Ilcol YO, Hizli ZB, Ozkan T. Leptin concentration in breast milk and its relationship to duration of lactation and hormonal status. Int Breastfeed J 2006; 1:21. [PMID: 17109762 PMCID: PMC1657001 DOI: 10.1186/1746-4358-1-21] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2006] [Accepted: 11/17/2006] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Leptin, a hormone present in breast milk, is involved in energy regulation and metabolism. The objectives of this study were to assess leptin concentrations in breast milk during the first 180 days postpartum, and to determine the relationship between the concentrations of milk leptin and circulating hormone levels in lactating women. METHODS Between April 2005 and January 2006, blood and breast milk samples were collected from 160 breastfeeding women enrolled either in the first three days (n = 37; colostrum), days 4-14 (n = 27; transitional milk), days 15-30 (n = 16; early mature milk), days 31-90 (n = 37; mature milk) or days 91-180 (n = 43; late mature milk) postpartum. Milk and serum leptin levels were measured by immunoradiometric assay. Cortisol was measured by radioimmunoassay method. Serum insulin, estradiol, prolactin and thyroxine were measured by chemiluminescent immunometric method. RESULTS Leptin concentrations in breast milk were highest (3.28 +/- 0.41 ng/ml) in colostrum, decreased during the first 180 days of lactation, showing a significant inverse relation (r = -0.694, p < 0.001) with the days of lactation. Colostrum leptin concentrations correlated with maternal serum leptin (r = 0.425, p < 0.01), cortisol (r = 0.549, p < 0.01) and thyroxine (r = -0.530, p < 0.01). Mature milk leptin concentrations correlated with maternal serum leptin (r = 0.547, p < 0.001), insulin (r = 0.331, p < 0.05) and thyroxine (r = -0.329, p < 0.01). Serum leptin concentrations correlated with serum insulin (r = 0.648, p < 0.001), estradiol (r = 0.639, p < 0.001), prolactin (r = 0.530, p < 0.001) and thyroxine (r = -0.327, p < 0.05) concentrations during days 1-3 postpartum. During 15-180 postpartum days, serum leptin concentrations correlated with serum insulin (r = 0.271, p < 0.01), and thyroxine (r = -0.345, p < 0.001). CONCLUSION Leptin concentrations in breast milk decrease with time during lactation and show significant relationships with other maternal hormones.
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Affiliation(s)
- Yesim Ozarda Ilcol
- Department of Biochemistry, Uludag University Medical School, Bursa, 16059, Turkey
| | - Z Banu Hizli
- Department of Biochemistry, Uludag University Medical School, Bursa, 16059, Turkey
| | - Tanju Ozkan
- Department of Pediatric Gastroenterology, Uludag University Medical School, Bursa, 16059, Turkey
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Petridou E, Mantzoros CS, Belechri M, Skalkidou A, Dessypris N, Papathoma E, Salvanos H, Lee JH, Kedikoglou S, Chrousos G, Trichopoulos D. Neonatal leptin levels are strongly associated with female gender, birth length, IGF-I levels and formula feeding. Clin Endocrinol (Oxf) 2005; 62:366-71. [PMID: 15730421 DOI: 10.1111/j.1365-2265.2005.02225.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To investigate predictors of circulating leptin in healthy full-term newborns and to explore the relationship with anthropometric variables, serum levels of adiponectin and the major components of the IGF system at birth. To explore whether leptin levels are regulated by breastfeeding vs. formula feeding. DESIGN Observational cross-sectional study. PATIENTS Three hundred and nineteen healthy full-term newborns delivered during 1999 in Athens, Greece. MEASUREMENTS Anthropometric measurements, formula feeding information and blood samples were obtained. Leptin and adiponectin determinations were performed using a radioimmunoassay (RIA). RESULTS Multivariate regression analyses showed that leptin levels were positively associated with female gender, newborn length, ponderal index and IGF-I levels, but not with adiponectin levels. Newborns who were fed exclusively with milk formulas had more than twice the leptin levels of those who were exclusively breastfed. CONCLUSIONS Leptin levels are positively related to female gender and anthropometric characteristics of neonates but, contrary to studies in adults, are not correlated with adiponectin levels. We also found evidence that formula feeding imparts a considerable increase in leptin levels in newborns.
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Affiliation(s)
- Eleni Petridou
- Department of Hygiene and Epidemiology, Athens University Medical School, Athens, Greece.
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13
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Leptin in Breast-Fed and Formula-Fed Infants. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2005. [DOI: 10.1007/1-4020-3535-7_34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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