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Wang P, Wu L, Wang H, Zhang L, Yin W, Tao R, Tao F, Zhu P. Prenatal air pollution, fetal β-cell dysfunction and neurodevelopmental delay. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 268:115705. [PMID: 37979352 DOI: 10.1016/j.ecoenv.2023.115705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/25/2023] [Accepted: 11/14/2023] [Indexed: 11/20/2023]
Abstract
BACKGROUND Emerging evidence has reported significant associations of prenatal air pollution exposure with neurodevelopmental delay in offspring. Sensitive exposure windows and the modifiable factor remain elusive. OBJECTIVE We aim to identify sensitive windows of air pollution during pregnancy on neurodevelopmental delay, and examine whether cord blood C-peptide mediates the relationship. METHODS This study included 7438 mother-newborn pairs in Hefei, China, from 2015 to 2021. Weekly exposure to particulate matter of aerodynamic diameter <2.5 µm, 10 µm (PM2.5, PM10), nitrogen dioxide (NO2) and carbon monoxide (CO) was estimated at regulatory air monitoring stations in Hefei. Denver Developmental Screening Test-II and the Gesell Developmental Schedules were applied to assess the neurodevelopmental delay in children 6-36 mon of age. Distributed lag nonlinear models examined sensitive time windows of prenatal air pollutants exposure. Mediation analysis estimated the mediating role of cord blood C-peptide. RESULTS The sensitive PM2.5, PM10, NO2, and CO exposure windows associated with neurodevelopmental delay were throughout pregnancy. Weekly air pollutants exposure was related to higher neurodevelopmental delay risks [cumulative odds ratio (OR): 1.40(1.29,1.53) in PM2.5 (per 10 μg/m3), 1.40(1.28,1.53) in PM10 (per 10 μg/m3), 1.41(1.30,1.52) in CO (per 0.1 mg/m3), and 1.49(1.29,1.72) in NO2 (per 5 μg/m3)]. Mediation analysis indicated 18.3 % contributions of cord C-peptide to the relationship [average mediation effect: 0.04(0.01.0.06); average direct effect: 0.15(0.07.0.25)]. CONCLUSIONS Exposure to air pollution throughout pregnancy is linked to neurodevelopmental delay mediated by poorer fetal β-cell function. Screening and treatment of abnormal glucose metabolism in infants could benefit the prevention of air pollution-associated neurodevelopment delay.
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Affiliation(s)
- Peng Wang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China; Center for Big Data and Population Health of IHM, Anhui Medical University, Hefei, Anhui, China
| | - Lin Wu
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China; Center for Big Data and Population Health of IHM, Anhui Medical University, Hefei, Anhui, China
| | - Haixia Wang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China; Center for Big Data and Population Health of IHM, Anhui Medical University, Hefei, Anhui, China
| | - Lei Zhang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China
| | - Wanjun Yin
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China
| | - Ruixue Tao
- Department of Obstetrics and Gynecology, the First People's Hospital of Hefei City, Hefei, China
| | - Fangbiao Tao
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China; Center for Big Data and Population Health of IHM, Anhui Medical University, Hefei, Anhui, China
| | - Peng Zhu
- Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University, Hefei, China; MOE Key Laboratory of Population Health Across Life Cycle, Hefei, China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei, China; Center for Big Data and Population Health of IHM, Anhui Medical University, Hefei, Anhui, China.
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Aref ABM, Ahmed OM, Ali LA, Semmler M. Maternal rat diabetes mellitus deleteriously affects insulin sensitivity and Beta-cell function in the offspring. J Diabetes Res 2013; 2013:429154. [PMID: 23998129 PMCID: PMC3753768 DOI: 10.1155/2013/429154] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 05/09/2013] [Accepted: 05/19/2013] [Indexed: 12/16/2022] Open
Abstract
This study was designed to assess the effect of maternal diabetes in rats on serum glucose and insulin concentrations, insulin resistance, histological architecture of pancreas and glycogen content in liver of offspring. The pregnant rat females were allocated into two main groups: normal control group and streptozotocin-induced diabetic group. After birth, the surviving offspring were subjected to biochemical and histological examination immediately after delivery and at the end of the 1st and 2nd postnatal weeks. In comparison with the offspring of normal control dams, the fasting serum glucose level of offspring of diabetic mothers was significantly increased at the end of the 1st and 2nd postnatal weeks. Serum insulin level of offspring of diabetic dams was significantly higher at birth and decreased significantly during the following 2 postnatal weeks, while in normal rat offspring, it was significantly increased with progress of time. HOMA Insulin Resistance (HOMA-IR) was significantly increased in the offspring of diabetic dams at birth and after 1 week than in normal rat offspring, while HOMA insulin sensitivity (HOMA-IS) was significantly decreased. HOMA beta-cell function was significantly decreased at all-time intervals in offspring of diabetic dams. At birth, islets of Langerhans as well as beta cells in offspring of diabetic dams were hypertrophied. The cells constituting islets seemed to have a high division rate. However, beta-cells were degenerated during the following 2 post-natal weeks and smaller insulin secreting cells predominated. Vacuolation and necrosis of the islets of Langerhans were also observed throughout the experimental period. The carbohydrate content in liver of offspring of diabetic dams was at all-time intervals lower than that in control. The granule distribution was more random. Overall, the preexisting maternal diabetes leads to glucose intolerance, insulin resistance, and impaired insulin sensitivity and β -cell function in the offspring at different postnatal periods.
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Affiliation(s)
- Abdel-Baset M. Aref
- Cell Biology and Histochemistry Division, Zoology Department, Faculty of Science, South Valley University, Qena, Egypt
| | - Osama M. Ahmed
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Salah Salem Street, P.O. Box 62514, Beni-Suef, Egypt
- Faculty of Oral and Dental Medicine, Nahda University, New Beni-Suef City, Beni-Suef, Egypt
| | - Lobna A. Ali
- Cell Biology and Histochemistry Division, Zoology Department, Faculty of Science, South Valley University, Qena, Egypt
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Regnault N, Botton J, Heude B, Forhan A, Hankard R, Foliguet B, Hillier TA, Souberbielle JC, Dargent-Molina P, Charles MA. Higher cord C-peptide concentrations are associated with slower growth rate in the 1st year of life in girls but not in boys. Diabetes 2011; 60:2152-9. [PMID: 21700880 PMCID: PMC3142086 DOI: 10.2337/db10-1189] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Accepted: 05/08/2011] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To understand the relationships between maternal glycemia during pregnancy and prenatal and early postnatal growth by evaluating cord C-peptide and IGF-I as mediating biomarkers in boys and girls separately. RESEARCH DESIGN AND METHODS We evaluated 342 neonates within the EDEN mother-child cohort study born to mothers without diabetes diagnosis before pregnancy. We measured maternal glycemia at 24-28 weeks of gestation and neonates' cord blood C-peptide (used as a proxy for fetal insulin) and IGF-I at birth. Reported maternal prepregnancy BMI and all measured infant weights and lengths in the 1st year were recorded. Growth modeling was used to obtain an individual growth curve for each infant in the 1st year. Path models, a type of structural equation modeling, were used for statistical analysis. Path analysis is a multivariate method associated with a graphical display that allows evaluation of mediating factors and distinguishes direct, indirect, and total effects. RESULTS Cord C-peptide at birth was positively correlated with maternal prepregnancy BMI and maternal glycemia and was higher in girls. In a path model that represented prenatal growth, there was no significant direct effect of maternal glycemia on birth weight, but the effect of maternal glycemia on birth weight was mediated by fetal insulin and IGF-I in both girls and boys. However, in girls only, higher concentrations of cord C-peptide (but not cord IGF-I or maternal glucose) were associated with slower weight growth in the first 3 months of life. CONCLUSIONS Our study underlines the role of the fetal insulin-IGF-I axis in the relationship between maternal glycemia during pregnancy and birth weight. We also show for the first time that high insulin concentration in female fetuses is associated with slower early postnatal growth. This slow, early growth pattern may be programmed by fetal hyperinsulinemia, and girls may be more susceptible than boys to its consequences.
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Affiliation(s)
- Nolwenn Regnault
- INSERM, U1018, Center for Research in Epidemiology and Population Health, Lifelong Epidemiology of Diabetes, Obesity, and Chronic Kidney Disease, Villejuif, France.
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Effect of maternal diabetes on postnatal development of brush border enzymes and transport functions in rat intestine. J Pediatr Gastroenterol Nutr 2009; 49:8-15. [PMID: 19465872 DOI: 10.1097/mpg.0b013e318189f2eb] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
AIMS/HYPOTHESIS The effect of alloxan-induced maternal diabetes has been studied on the postnatal development of brush border enzymes in rat intestine. MATERIALS AND METHODS Diabetes was induced by injecting alloxan in rat mothers on day 3 of gestation. RESULTS There was no change in gestational period (22 days) in control and diabetic groups; however, the litter size was reduced (P < 0.001) in diabetic mothers compared with controls. Body weight of pups born to diabetic mothers was significantly low up to 45 days of postnatal age compared with controls. Analysis of brush border enzymes revealed elevated levels of lactase (76%), sucrase (46%), maltase (25%), trehalase (38%), alkaline phosphatase (57%), and leucine aminopeptidase (56%) up to 21 days of postnatal age in diabetic group compared with controls. However, in 30- to 45-day-old animals, the enzyme levels were either reduced in diabetic group or there was no change compared with controls. Western blot analysis corroborated the enzyme analysis data in purified brush borders. Also, 45 days after birth, the intestinal uptake of D-glucose and glycine was significantly high (30%-61%) in pups from diabetic dams compared with controls. CONCLUSIONS These findings indicate that alloxan-induced maternal diabetes influences the postnatal development of intestine and the expression of various brush border enzymes and transport functions in rat intestine. This could affect the growth and development of the offspring during the postnatal period.
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Ennis K, Tran PV, Seaquist ER, Rao R. Postnatal age influences hypoglycemia-induced neuronal injury in the rat brain. Brain Res 2008; 1224:119-26. [PMID: 18582442 DOI: 10.1016/j.brainres.2008.06.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Accepted: 06/02/2008] [Indexed: 01/21/2023]
Abstract
Acute hypoglycemia is associated with neuronal injury in the mature human and rodent brains. Even though hypoglycemia is a common metabolic problem during development, its effects on the developing brain are not well understood. To characterize the severity of regional brain injury, postnatal day (P) 7, P14, P28 (N=20-30/age) and adult rats (N=8-12) were subjected to acute hypoglycemia of equivalent severity and duration (mean blood glucose concentration: 30.0+/-0.1 mg/dL for 210 min). Neuronal injury in the cerebral cortex, striatum, hippocampus and hypothalamus was assessed 24 h, 72 h and 1 wk later by determining the number of degenerating cells positive for Fluoro-Jade B (FJB+) in the region. Compared with age-matched control, greater number of FJB+ cells was present per brain section of P14, P28 and adult hypoglycemia groups (p<0.005, each). The cerebral cortex was more vulnerable than hippocampus and striatum at all three ages (p<0.01). Compared with P28 (131+/-21) and adult (171+/-21) rats, fewer FJB+ cells (39+/-6) per brain section were present in P14 hypoglycemic rats (p<0.01, each). Hypoglycemia was not associated with cell injury in P7 rats. FJB+ cells were absent in the hypothalamus in all four ages. Similar results were present 24 h post-hypoglycemia, whereas analysis at 1 wk demonstrated efficient clearing of FJB+ cells in the brain regions of developing rats. Varying the duration of fasting did not alter the severity of regional cell injury. These results suggest that postnatal age influences the regional vulnerability to hypoglycemia-induced neuronal death in the rat brain.
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Affiliation(s)
- Kathleen Ennis
- Division of Neonatology, Department of Pediatrics, University of Minnesota, Minneapolis, MN 55455, USA
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Wichi RB, Souza SB, Casarini DE, Morris M, Barreto-Chaves ML, Irigoyen MC. Increased blood pressure in the offspring of diabetic mothers. Am J Physiol Regul Integr Comp Physiol 2005; 288:R1129-33. [PMID: 15661971 DOI: 10.1152/ajpregu.00366.2004] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Studies were conducted in rats to determine the effect of maternal diabetes and the consequent hyperglycemia on cardiovascular function in the offspring. Diabetes was induced in pregnant Wistar rats through streptozotocin injection (50 mg/kg). Cardiovascular parameters were measured in 2-mo-old offspring animals of diabetic (OD, n=12) and control rats (OC, n=8). Arterial pressure (AP), heart rate (HR), baroreflex sensitivity, and vascular responsiveness to phenylephrine (PH) and sodium nitroprusside (SN) were measured. Angiotensin-converting enzyme (ACE) activity in heart, kidney, and lung was determined. OD rats exhibited increases in systolic AP (138+/-8 vs. 119+/-6 mmHg, OD vs. OC), with no change in HR (342+/-21 vs. 364+/-39 beats per minute (bpm), OD vs. OC). The reflex tachycardia elicited by SN was reduced in OD rats, as indicated by the slope of the linear regression (-2.2+/-0.4 vs. -3.6+/-0.8 bpm/mmHg, OD vs. OC). Vascular responsiveness to PH was increased 63% in OD rats compared with OC. OD rats showed increases in ACE activity in heart, kidney, and lung (1.13+/-0.24, 3.04+/-0.86, 40.8+/-8.9 vs. 0.73+/-0.19, 1.7+/-0.45, 28.1+/-6 nmol His-Leu.min-1 mg protein-1, OD vs. OC). Results suggest that diabetes during pregnancy affects cardiovascular function in offspring, seen as hypertension, baroreflex dysfunction, and activation of tissue renin-angiotensin system.
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Affiliation(s)
- Rogerio B Wichi
- Nephrology Department, Federal University of São Paulo, Brazil
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