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Newborns Delivered To Obese Mothers May Have Lower Levels Of IronMain Category: Pregnancy / Obstetrics Also Included In: Obesity / Weight Loss / Fitness; Pediatrics / Children's Health Article Date: 11 Jul 2012 - 0:00 PDT Newborns Delivered To Obese Mothers May Have Lower Levels Of Iron A growing number of studies imply that children born to obese mothers face health problems stemming from the womb. New research from the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University and The Mother Infant Research Institute at Tufts Medical Center suggests that low iron status is among these health problems, according to an analysis of maternal hepcidin, a hormone that is key in keeping iron levels balanced. The study enrolled 15 obese pregnant women with body mass index (BMI) greater than 30 and 15 healthy weight pregnant women with BMIs between 20 and 25 as a control group. Maternal blood draws took place during the second trimester of pregnancy and newborn iron status was measured in cord blood. The researchers found that being born to an obese mother with elevated hepcidin levels was associated with lower iron status at birth. Obese adults are known to produce higher levels of hepcidin compared to healthy weight adults and the researchers suggest that overproduction of the hormone interferes with the transfer of iron from mother to infant. The results were recently published online by the Journal of Perinatology. During pregnancy, hepcidin levels are kept at low levels to optimize iron transfer from mother to fetus. "When there is excess hepcidin in a cell, it binds to and inhibits the function of ferroportin, the protein that allows iron to pass through the cell membrane and into the bloodstream," explained senior author Simin Nikbin Meydani, DVM, PhD, director of the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University (USDA HNRCA). "The chronic low-grade inflammation that can result from being obese triggers an abnormal immune response, increasing production of proteins that increase hepcidin levels," added Maria Carlota Dao, first author and a doctoral student in the Nutritional Immunology Laboratory at the USDA HNRCA. Because iron plays a crucial role in the formation of the central nervous system, children born with iron deficiency are at a greater risk for delays in motor and cognitive development. "The data on the impact of low maternal iron levels on the fetus comes from undernourished populations," said first author Sarbattama Sen, MD, a neonatologist at Tufts Medical Center and an assistant professor of pediatrics at Tufts University School of Medicine (TUSM). "To the best of our knowledge, ours is the first study to demonstrate that obesity might hamper iron transfer from mother to child and offers some insight into the mechanism of how it occurs. Future studies, however, are needed to confirm the role of obesity associated with inflammation during pregnancy on hepcidin and iron status of the newborn." The authors further stress that more research is needed before any changes to dietary guidelines or recommendations to obese pregnant women should be considered. Most prenatal vitamin supplements contain 27 milligrams of iron, the daily amount currently recommended by The American Congress of Obstetricians and Gynecologists. "During pregnancy, women should try to eat a varied, healthy diet while taking the standard prenatal vitamins recommended by their doctors," Sen adds. "Weight gain goals should be based on a woman's BMI prior to becoming pregnant. In 2009, the Institute of Medicine issued new guidelines on weight gain during pregnancy." Visit our pregnancy / obstetrics section for the latest news on this subject. The authors received funding for this study from the USDA, a Tufts Medical Center Research Grant, the Natalie V. Zucker Foundation for Women Scholars, the Stanley N. Gershoff Scholarship and the National Heart Lung and Blood Institute (NHLBI) T32 training program. Dao MC, Sen S, Iyer C, Klebenov D, and Meydani SN. "Obesity During Pregnancy and Fetal Iron Status: Is Hepcidin the Link?" Journal of Perinatology advance online publication. Tufts University, Health Sciences Campus MLA APA http://www.medicalnewstoday.com/releases/247638.php. 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Saznajte na vrijemeDobar razlog da se ne udebljate u trudnoći Djeca pretilih majki imaju zdravstvene probleme koji se razvijaju još u maternici. Nova studija pokazala je kako je i niska razina željeza jedan od zdravstvenih problema koji ih pogađaju. Istraživanje je uključilo 15 pretilih žena s ITM višim od 30 te 15 zdravih žena s ITM između 20 i 25 koje su predstavljale kontrolnu skupinu. Trudnicama je tijekom drugog tromjesečja uziman uzorak krvi, a razina željeza kod novorođenčadi mjerena je iz krvi pupčane vrpce. Otkrili su da pretile majke imaju višu razinu hepcidina, hormona koji je zadužen za održavanje ravnoteže razine željeza u krvi, a koji se povezuje s niskom razinom željeza kod novorođenčadi. Poznato je kako pretile osobe proizvode više hepcidina u usporedbi s osobama normalne tjelesne mase. Znanstvenici smatraju kako prekomjerna proizvodnja tog hormona ometa prijenos željeza s majke na dijete. Naime, tijekom trudnoće organizam održava razinu hepcidina niskom kako bi prijenos željeza između majke i djeteta bio optimalan. Kod visoke razine hepcidina u stanici dolazi do inhibicije feroportina – proteina koji omogućuje prijenos željeza iz stanice u krvotok kroz staničnu membranu. Kronična niska razina upale koja je karakteristična za pretilost uzrokuje abnormalan odgovor imunološkog sustava rezultirajući povećanom proizvodnjom proteina koji povisuju razinu hepcidina. S obzirom da željezo igra važnu ulogu u razvoju središnjeg živčanog sustava, djeca rođena s niskom razinom željeza su u većem riziku od sporijeg razvoja motoričkih i kognitivnih vještina. vitamini.hr