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Investigating the Impact of Human Milk Oligosaccharides on Child Development
Investigating the Impact of Human Milk Oligosaccharides on Child Development
Investigating the Impact of Human Milk Oligosaccharides on Child Development

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105203
ISBN  
9798270289256
DDC  
614.4
저자명  
Zambrana, Luis Enrique.
서명/저자  
Investigating the Impact of Human Milk Oligosaccharides on Child Development
발행사항  
[Sl] : The University of North Carolina at Chapel Hill, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
112 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-07, Section: B.
주기사항  
Advisor: Becker-Dreps, Sylvia.
학위논문주기  
Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
초록/해제  
요약Human milk oligosaccharides (HMOs) are bioactive components of breast milk with growing evidence suggesting roles in shaping infant growth and neurodevelopment. However, their long-term effects remain poorly understood, particularly in underrepresented populations.This dissertation examined the associations between individual HMO concentrations measured at one month postpartum (or the closest timepoint for which we had a sample) and two developmental outcomes in a population-based birth cohort from Leon, Nicaragua: linear growth at 24 months and neurodevelopment at around 48 months of age. Linear growth was assessed using the World Health Organization standardized z-scores for length-for-age (LAZ), weight-for-age (WAZ), and weight-for-length (WLZ). Neurodevelopment was evaluated using the Mullen Scales of Early Learning (MSEL), including subdomain and composite scores. Human milk samples were analyzed using high-performance liquid chromatography with fluorescence detection (HPLC-FL). Associations were estimated using generalized linear regression models, both unweighted and weighted using inverse probability of censoring weights (IPCW) to account for variation in breastfeeding duration. Models adjusted for maternal, infant, and household-level covariates.In Aim 1, higher concentrations of sialylated HMOs, including 3'-sialyllactose (3'SL), difucosyllactose (DFLac), sialyllacto-N-tetraose c (LSTc), and disialyllacto-N-tetraose (DSLNT), were positively associated with LAZ, suggesting a potential role in promoting linear growth. Notably, 3'SL and DFLac showed consistent associations across both multivariable and IPCW-weighted models. In contrast, higher concentrations of fucosyllacto-N-hexaose (FLNH) and disialyllacto-N-hexaose (DSLNH) were negatively associated with WAZ, indicating potential inverse relationships with weight-related growth indicators.In Aim 2, higher concentrations of sialylated HMOs, particularly 3'SL and LSTc, were negatively associated with multiple MSEL domains, including visual reception (VR), fine motor (FM), expressive language (EL), and the Early Learning Composite (ELC). Additionally, non-fucosylated lacto-N-hexaose (LNH) and fucosylated FLNH demonstrated inverse associations with several MSEL domains. These associations remained robust in sensitivity analyses restricted to secretor mothers and after applying IPCW.These findings highlight the complex, domain-specific associations between early-life HMO exposures and child growth and neurodevelopment. They underscore the importance of investigating HMO profiles in diverse populations to inform future personalized nutrition strategies, particularly in low- and middle-income settings.
일반주제명  
Epidemiology
일반주제명  
Neurosciences
일반주제명  
Pediatrics
일반주제명  
Nutrition
키워드  
Breastfeeding
키워드  
Human milk oligosaccharides
키워드  
Infant's growth
키워드  
Infant's neurocognitive development
키워드  
Mullen scale of early learning
기타저자  
The University of North Carolina at Chapel Hill Epidemiology
기본자료저록  
Dissertations Abstracts International. 87-07B.
전자적 위치 및 접속  
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■1001  ▼aZambrana,  Luis  Enrique.
■24510▼aInvestigating  the  Impact  of  Human  Milk  Oligosaccharides  on  Child  Development
■260    ▼a[Sl]▼bThe  University  of  North  Carolina  at  Chapel  Hill▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a112  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-07,  Section:  B.
■500    ▼aAdvisor:  Becker-Dreps,  Sylvia.
■5021  ▼aThesis  (Ph.D.)--The  University  of  North  Carolina  at  Chapel  Hill,  2025.
■520    ▼aHuman  milk  oligosaccharides  (HMOs)  are  bioactive  components  of  breast  milk  with  growing  evidence  suggesting  roles  in  shaping  infant  growth  and  neurodevelopment.  However,  their  long-term  effects  remain  poorly  understood,  particularly  in  underrepresented  populations.This  dissertation  examined  the  associations  between  individual  HMO  concentrations  measured  at  one  month  postpartum  (or  the  closest  timepoint  for  which  we  had  a  sample)  and  two  developmental  outcomes  in  a  population-based  birth  cohort  from  Leon,  Nicaragua:  linear  growth  at  24  months  and  neurodevelopment  at  around  48  months  of  age.  Linear  growth  was  assessed  using  the  World  Health  Organization  standardized  z-scores  for  length-for-age  (LAZ),  weight-for-age  (WAZ),  and  weight-for-length  (WLZ).  Neurodevelopment  was  evaluated  using  the  Mullen  Scales  of  Early  Learning  (MSEL),  including  subdomain  and  composite  scores.  Human  milk  samples  were  analyzed  using  high-performance  liquid  chromatography  with  fluorescence  detection  (HPLC-FL).  Associations  were  estimated  using  generalized  linear  regression  models,  both  unweighted  and  weighted  using  inverse  probability  of  censoring  weights  (IPCW)  to  account  for  variation  in  breastfeeding  duration.  Models  adjusted  for  maternal,  infant,  and  household-level  covariates.In  Aim  1,  higher  concentrations  of  sialylated  HMOs,  including  3'-sialyllactose  (3'SL),  difucosyllactose  (DFLac),  sialyllacto-N-tetraose  c  (LSTc),  and  disialyllacto-N-tetraose  (DSLNT),  were  positively  associated  with  LAZ,  suggesting  a  potential  role  in  promoting  linear  growth.  Notably,  3'SL  and  DFLac  showed  consistent  associations  across  both  multivariable  and  IPCW-weighted  models.  In  contrast,  higher  concentrations  of  fucosyllacto-N-hexaose  (FLNH)  and  disialyllacto-N-hexaose  (DSLNH)  were  negatively  associated  with  WAZ,  indicating  potential  inverse  relationships  with  weight-related  growth  indicators.In  Aim  2,  higher  concentrations  of  sialylated  HMOs,  particularly  3'SL  and  LSTc,  were  negatively  associated  with  multiple  MSEL  domains,  including  visual  reception  (VR),  fine  motor  (FM),  expressive  language  (EL),  and  the  Early  Learning  Composite  (ELC).  Additionally,  non-fucosylated  lacto-N-hexaose  (LNH)  and  fucosylated  FLNH  demonstrated  inverse  associations  with  several  MSEL  domains.  These  associations  remained  robust  in  sensitivity  analyses  restricted  to  secretor  mothers  and  after  applying  IPCW.These  findings  highlight  the  complex,  domain-specific  associations  between  early-life  HMO  exposures  and  child  growth  and  neurodevelopment.  They  underscore  the  importance  of  investigating  HMO  profiles  in  diverse  populations  to  inform  future  personalized  nutrition  strategies,  particularly  in  low-  and  middle-income  settings.
■590    ▼aSchool  code:  0153.
■650  4▼aEpidemiology
■650  4▼aNeurosciences
■650  4▼aPediatrics
■650  4▼aNutrition
■653    ▼aBreastfeeding
■653    ▼aHuman  milk  oligosaccharides
■653    ▼aInfant's  growth
■653    ▼aInfant's  neurocognitive  development
■653    ▼aMullen  scale  of  early  learning
■690    ▼a0766
■690    ▼a0767
■690    ▼a0317
■690    ▼a0570
■71020▼aThe  University  of  North  Carolina  at  Chapel  Hill▼bEpidemiology.
■7730  ▼tDissertations  Abstracts  International▼g87-07B.
■790    ▼a0153
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359717▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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