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En naturhistorie om genetiske og miljømæssige prædiktorer for pubertetsstart blandt unge med fedme

En naturhistorie om genetiske og miljømæssige prædiktorer for pubertetsudviklingens timing blandt unge med fedme

Background:

Obesity affects 1 in 5 children in the United States. Childhood obesity often persists into adolescence and adulthood. It can also raise the risk of sleep apnea, fatty liver disease, and fluid buildup in the brain and lead to early-onset puberty. This natural history study will explore how factors such as genes, hormones, diet, and chemical exposures affect puberty in children with obesity.

Objective:

To learn which factors predict the early start of puberty in children with obesity vs those of normal weight.

Eligibility:

Children aged 5 to 7 years with obesity or of normal weight.

Design:

Participants will have clinic visits every 6 months until they reach age 12.

Each clinic visit will include these tests and procedures:

A physical exam.

Collection of blood, urine, and saliva samples. Some samples will be used for genetic tests.

Questions about medical history and medications and supplements.

A questionnaire about their physical activity over the previous week.

A silicone wrist band. Participants will wear a soft wristband for a week prior to each visit. It will tell researchers what chemicals the children were exposed to during that time.

Breast ultrasound, for girls. A gel will be applied, and a wand will be pressed against the skin. The wand uses sound waves to see the tissue inside the breast.

DXA whole body scan. Once a year, participants will have a DXA (dual energy X-ray absorptiometry) scan. This scan measures the amount of bone, muscle, and fat in the body.

Optional food diary. Parents may record everything the participant eats for two 24-hour periods

...

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Study Description:

This is a longitudinal study to predict pubertal timing in 5-12-year-old girls and boys with obesity. We hypothesize that: 1) Children with obesity with exposure to estrogenic environmental compounds will demonstrate earlier puberty than those without such an exposure. 2) A polygenic risk score (PRS) of alleles that confer risk for voice break in boys will associate with age at Tanner II pubertal development in boys with obesity. 3) A polygenic risk score (PRS) of alleles that confer risk for menarche in girls will associate with age at stage II pubertal development in girls with obesity. 4) Children with obesity who demonstrate a decrease in BMI percentile of > 5 percentage points will demonstrate later stage II pubertal development than children with no change or an increase in BMI percentile but will demonstrate earlier pubertal development than peers of normal weight.

Objectives:

  • Primary Objective: To identify predictors of pubertal timing in 5-12-year old children with obesity.
  • Secondary Objectives: To determine the effect of obesity on reproductive hormones and adrenarche.

Endpoints:

  • Primary Endpoint: pubertal markers by questionnaire, physical exam (testicular volume, breast development), and ultrasound (breast morphological stage). Pubertal development will be defined as breast morphological stage B and a testicular volume of 4 cc.
  • Secondary Endpoints: Tanner pubic hair staging, reproductive hormones (luteinizing hormone (LH), Follicle-stimulating hormone (FSH), estradiol, total testosterone, dehydroepiandrosterone sulfate (DHEAS), androstenedione)

Undersøgelsestype

Observationel

Tilmelding (Anslået)

400

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: NIEHS Join A Study Recruitment Group
  • Telefonnummer: (855) 696-4347
  • E-mail: myniehs@nih.gov

Undersøgelse Kontakt Backup

Studiesteder

    • North Carolina
      • Research Triangle Park, North Carolina, Forenede Stater, 27709
        • National Institute of Environmental Health Sciences Clinical Research Unit
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

5 år til 12 år (Barn)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Children from the community and the Obesity Weight Management Clinic within the greater Raleigh, Durham, Chapell Hill North Carolina area.

Beskrivelse

  • INCLUSION CRITERIA:

To be eligible to participate in this study, an individual must meet all of the following criteria:

  1. Stated willingness to comply with all study procedures and availability for the duration of the study, including sharing medical records
  2. Male or female, aged 5 to 7 years at the screening visit
  3. Normal weight (defined as BMI > 5th percentile and <85th percentile for age and sex) or Obese weight (defined as BMI > 95th percentile for age and sex)
  4. Ability of parent or guardian to understand and willingness to sign a written informed consent document. And ability of the participant (child) to provide verbal assent and/or to sign a written assent document.

EXCLUSION CRITERIA:

An individual who meets any of the following criteria will be excluded from participation in this study:

  1. Known diagnosis of syndromic/genetic form of obesity
  2. Current use of medications or supplements that affect reproductive hormones (e.g., estrogen, progesterone, testosterone, puberty blockers, regular use of lavender oil or tea tree oil)
  3. Chronic medical conditions (e.g., type 1 or type 2 diabetes, cancer, renal failure, lupus, etc.), at the discretion of the Principal Investigator
  4. Clinically significant abnormal laboratory values, at the discretion of the Principal Investigator
  5. International adoptee (associated with earlier puberty)

Individuals who do not meet the criteria for participation in this study (screen failure) because of an acute, reversible or transient medical reason may be rescreened upon reversal, improvement or stabilization of their clinical status. Participants who develop an acute, reversible or transient medical condition during the study may return upon reversal, improvement or stabilization of their clinical status.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: COHORT
  • Tidsperspektiver: PROSPECTIVE

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Normal weight children

BMI > 5th percentile and <85th percentile for age and sex

No strategies for weight loss

Obese weight children

BMI > 95th percentile for age and sex

No strategies for weight loss

Pediatric Weight Management Clinic, which utilizes multiple, individualized strategies to effect weight loss (such as nutrition, behavioral therapy, exercise programs)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
To identify predictors of pubertal timing in 5-12-year-old children with obesity
Tidsramme: 1. Every 6 months2. Every 6 - 12 months, investigator discretion

1. pubertal markers by questionnaire, physical exam (testicular volume, Tanner breast staging), and 2. ultrasound (breast morphological stage).

1. Every 6 months2. Every 6 - 12 months, investigator discretion

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
To determine the effect of obesity on reproductive hormones and adrenarche.
Tidsramme: Every 6 months

Tanner pubic hair staging, reproductive hormones

Every 6 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Natalie D Shaw, M.D., National Institute of Environmental Health Sciences (NIEHS)

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

9. november 2026

Primær færdiggørelse (Anslået)

23. december 2036

Studieafslutning (Anslået)

23. december 2036

Datoer for studieregistrering

Først indsendt

26. februar 2026

Først indsendt, der opfyldte QC-kriterier

26. februar 2026

Først opslået (Faktiske)

27. februar 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

3. november 2026

Sidst verificeret

23. februar 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 10002237
  • 002237-E

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Deidentified/coded Individual participant data: Demographics, Clinical Data (medical history, medications, phenotypic data, questionnaire data, physical exam, lab tests), Genomic Data (DNA and RNA sequencing), Exposomic data, and Metabolomic data.

IPD-delingstidsramme

Starting 6 months after publication, aggregated and summarized data would be made available.

IPD-delingsadgangskriterier

Data could be made available for sharing upon request, with requesters securing appropriate IRB approvals, and following establishment of a data transfer agreement. @@@@@@@@@@@@WES/WGS and RNAseq data are planned to be deposited in dbGaP, a controlled access database, at the time of publication for those subjects who consented to deposit data in dbGaP. @@@@@@

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • ICF

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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