Clinical trial NCT06288126: Maternal and Fetal Metabolic Changes
Official title: Evaluation of Clinical and Ecographic Risk Markers in Pregnancies at High and Low Risk for the Development of Glycemic and Metabolic Complications in Pregnancy
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Pregnancy Related
Maternal-Fetal Relations
Metabolism Disorder, Glucose
Keywords: metabolism
insulin resistance
adipose tissue
insulin-signalling pathway
Lead sponsor: Azienda Ospedaliero, Universitaria Pisana
Sponsor class: OTHER
First posted: 2024-03-01
Enrollment: 457
Sex: FEMALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Women with a singleton pregnancy attending our Centre for aneuploidies screening in the first trimester.

Brief summary: The goal of this observational prospective project is to study the metabolic alterations during normal and complicated pregnancies, obtaining an early detection of metabolic changes, offering new insights into future prevention and treatment strategies for both mother and offspring.

Primary objectives:

* measurement of maternal blood adipokine levels, during the first trimester of pregnancy, in two groups of women (high and low risk), in order to identify early markers which, in conjunction with the medical history, can identify women at increased risk of developing GDM
* ultrasound measurement of adipose tissue deposits at ectopic sites, comparing low- and high-risk women, and assessing the effect of pregnancy on these deposits.
* Identification, by targeted ultrasound assessment, of fetuses at increased risk of macrosomia.

Secondary objectives:

* Evaluation of the prevalence of GDM and its complications in a population of low- and high-risk women.
* Evaluation of neonatal complications in children born to low- and high-risk mothers (need for resuscitation, hypoglycaemia, hypocalcaemia, admission to neonatal intensive care unit).

The participants will be recruited during first trimester ultrasound after signing the informed consent.

Detailed description: Pregnancy has been defined "a stress test for life". During pregnancy, even if uncomplicated, women experience metabolic and cardiovascular changes that predispose to vascular endothelial dysfunction. Women who are already predisposed to this phenotype develop gestational hypertension or gestational diabetes (GDM), which can re-emerge later in life. This has been demonstrated by several studies in which the presence of pregnancy diseases (GDM, maternal preeclampsia and fetal growth disorder) correlate with the development of chronic disorders, such as chronic hypertension, diabetes mellitus and metabolic syndrome, suggesting a common pathogenic pathway. From this point of view, pregnancy constitutes a unique period to evaluate metabolic and cardiovascular markers, to better understand the pathogenesis of these disorders and possibly obtain preventive strategies. The identification of early biomarkers of metabolic dysfunction would be particularly useful in overweight and obese pregnant women. There is a growing prevalence of obesity worldwide; in developed Countries, 40-50% of the pregnant population is overweight and obese, which is, according to a recent report from the United Kingdom, the main contributing cause of death during gestation.

In addition, obesity and maternal hyperglycaemia during pregnancy may induce intrauterine overnutrition and fetal hyperinsulinemia, resulting in excessive fetal growth. Fetal macrosomia is associated with an increased risk of perinatal morbidity and mortality. Large babies have increased risk of intrapartum complications such as prolonged labour and shoulder dystocia. Moreover, the environmental and metabolic characteristics of intrauterine life deeply influence the individual in the long-term as a child and through adulthood, with possible adverse metabolic consequences, including predisposition to insulin resistance and obesity.

The evaluation of fetal tissue distribution and the recently introduced study of the fetal liver volume constitute very interesting markers of fetal adiposity and could be used as early indicators of insulin resistance in newborns.

The participants will be recruited during first trimester ultrasound after signing the informed consent. At 11-13 weeks:

* Ultrasound evaluation of fetal biometry and amniotic fluid will be performed. Periodic maternal anthropometric evaluation (weight gain and body mass index (BMI), blood pressure). Women will be divided in lean, overweight and obese.
* Blood sample for inflammatory cytokines will be taken.
* Maternal body composition evaluation through bioimpedance and/or highly reliable ultrasound-based analysis of ectopic fat. This approach is ideal to provide biomarkers of insulin resistance. In brief, women will be evaluated by a standardized set of US clips for the assessment of liver fat, cardiac fat, abdominal subcutaneous and visceral fat.

At 16-18 weeks: standard screening for gestational diabetes for high risk women, as for clinical practice

At 24-28 weeks:

* Standard screening for gestational diabetes to all women
* Fetal ultrasound to study fetal liver volume and/or subcutaneous fat tissue quantification. These constitute innovative techniques to obtain an early identification of macrosomic fetuses.

At delivery:

* Information on mode of delivery and any complications
* Within 48 hours of birth, anthropometric assessment of the infant according to clinical practice (weight, abdominal and head circumference).

Eligibility criteria: Inclusion Criteria:

* singleton pregnancy
* first visit between 11 and 14 weeks of pregnancy

Exclusion Criteria:

* consent withdrawal
* multiple pregnancy
* prepregnancy diabetes mellitus
* women undergoing therapy with oral hypoglycaemic drugs
* previous bariatric surgery
* fetal chromosomal and/or major structural abnormalities were excluded

Primary outcomes:
measure: Blood adipokine levels
timeFrame: Between 11 (+0 days) and 13 (+6 days) weeks of pregnancy (recruitment visit)
measure: Abdominal Fat Thickness
timeFrame: Between 11 (+0 days) and 13 (+6 days) weeks of pregnancy (recruitment visit)
measure: Fetal Adipose Tissue Deposits
timeFrame: Between 28 (+0 days) and 40 (+6 days) weeks of pregnancy (third trimester control visit)
Secondary outcomes:
measure: Gestational diabetes prevalence
timeFrame: Between 14 (+0 days) and 27 (+6 days) weeks of pregnancy (second trimester control visit) and third trimester control visit
measure: Obstetric complications and mode of delivery
timeFrame: Recruitment visit; second trimester control visit; third trimester control visit; in the day of the delivery, in average 6 months after recruitment visit (post-partum visit)
Other outcomes:
Locations:
city: Pisa
country: Italy
facility: Azienda Ospedaliera Universitaria Pisana
Study officials:
affiliation: University of Pisa
name: Tommaso Simoncini, MD. PhD.
role: PRINCIPAL_INVESTIGATOR
References: