Study Finds Parent-of-Origin Effects Shape Children’s Blood Sugar, Lipids and Diabetes Risk
A new Diabetologia study finds parent-of-origin effects: mothers’ genes more strongly shape offspring blood sugar and lipid trajectories, while fathers’ genes influence insulin function across the life course.
The study, led by geneticist Rashmi Prasad and published in Diabetologia, reports that parent-of-origin effects—differences in how a trait is inherited depending on whether it comes from the mother or father—appear to shape key cardiometabolic traits from birth into young adulthood. Using genetic markers and longitudinal measurements from Indian birth cohorts, the research team found that maternal influences were dominant for birth weight, blood glucose regulation and lipid levels, whereas paternal inheritance showed a stronger association with the child’s insulin sensitivity and secretion over time. The findings highlight distinct parental contributions to traits linked to type 2 diabetes and cardiovascular risk.
Large Indian cohorts and genetic analysis support the findings
The analysis drew on about 2,400 participants from the Pune Maternal Nutrition Study (PMNS) and additional replication in the Pune Children’s Study, together providing extensive follow-up from birth to age 24. Researchers combined anthropometric measures, blood glucose and lipid panels, and standardized tests of insulin function with genetic data to examine how parental traits associate with offspring outcomes. Statistical models separated maternal and paternal genetic contributions and assessed how those associations changed at ages 6, 12 and 24 years.
The study design was observational and used genetic markers to infer parent-specific effects rather than clinical intervention, which the authors note limits claims of causation. Nonetheless, the longitudinal framework and replication cohort lend weight to the reported parent-of-origin patterns and provide a rare life-course perspective on inherited cardiometabolic risk.
Maternal genes more strongly linked to birth weight, blood sugar and lipids
Across measured ages, the researchers observed that a child’s birth weight and later blood glucose and lipid profiles were more closely aligned with the mother’s genetic markers than the father’s. Maternal influence was evident from the neonatal period and persisted into adulthood, suggesting that maternal factors shape metabolic set points early in life. The pattern was consistent when examining group-level similarities between mothers and offspring for fasting glucose, cholesterol and other lipid measures.
Investigators propose that a combination of maternal genetics and intrauterine environment may explain these persistent associations, with nutrients, placental function and maternal metabolism during pregnancy all possible contributors. The authors emphasize that maternal control of glucose and cholesterol during pregnancy could represent a practical target for interventions aimed at reducing offspring cardiovascular disease risk.
Paternal genes tied to evolving insulin sensitivity and secretion
In contrast to the maternal patterns, the study found that measures of insulin resistance and pancreatic beta-cell function in offspring demonstrated a stronger association with paternal genetic contribution, particularly as children aged. Tests of insulin sensitivity and insulin secretion showed increasing paternal linkage across the three time points, implying that paternal inheritance may play a larger role in the mechanisms that directly confer type 2 diabetes risk. This distinction suggests different genetic or epigenetic pathways underpinning glucose regulation versus insulin dynamics.
Researchers noted that paternal influence on insulin traits could reflect inherited alleles affecting insulin metabolism or imprinting patterns that express parent-specific effects. The finding also aligns with the idea that genetic risk can manifest differently over the life course, with some parental effects emerging or strengthening with age and lifestyle exposures.
Implications for prevention: targeting parental health before and during pregnancy
The authors argue that understanding parent-of-origin effects could refine prevention strategies by indicating whose health to prioritize for certain risks. If maternal genes and prenatal milieu exert a dominant influence on offspring cholesterol and glucose trajectories, then optimizing maternal metabolic health during pregnancy could yield long-term benefits for children. Interventions might include stricter monitoring and control of maternal glucose and lipid levels in prenatal care to reduce future cardiometabolic risk in offspring.
At the same time, the stronger paternal association with insulin function underscores the potential value of engaging fathers in preconception and family health programs. Lifestyle measures such as increased physical activity, dietary modification and weight management can improve insulin sensitivity in adults, which may indirectly reduce inherited or environmental risk passed to children.
Study limitations and directions for further research
The researchers are careful to underscore that the study is observational and cannot establish causality; genetic associations and statistical parent-of-origin patterns do not prove mechanistic pathways. The cohorts studied are based in Pune, India, and while the team validated findings in a second local cohort, broader replication across diverse populations will be needed to confirm generalizability. The mechanisms—whether genomic imprinting, mitochondrial factors, or in utero exposures—remain to be disentangled.
Future research priorities include detailed molecular studies to identify specific imprinted loci or parental-allele effects and experimental work to parse prenatal environmental contributions from inherited genetic variants. Long-term intervention trials that address parental metabolic health before and during pregnancy could test whether modifying those factors alters offspring cardiometabolic trajectories.
The study provides compelling evidence that parent-of-origin effects shape different components of children’s cardiometabolic profiles and suggests complementary roles for maternal and paternal health in determining lifelong disease risk. The authors conclude that integrating parental health into strategies for early prevention of type 2 diabetes and cardiovascular disease may help reduce intergenerational transmission of metabolic risk.
