Lessons learned from 25 years of research into long term consequences in Dutch famine 1944/1945

13 important questions on Lessons learned from 25 years of research into long term consequences in Dutch famine 1944/1945

How was exposure to famine during gestation defined

As an average maternal daily ration of 1000 calories during any 13 week period of gestation

What is the differences between babies exposed to famine in early, mid and late gestation

Early: heavier and longer at birth, more efficient placenta

mid and late; lighter and shorter at birth, placenta less efficient

What are the obese differences

Women (not men) exposed to famine in early gestation more obese at age 50 compared to unexposed women

exposure to famine during any period of gestation was associated with reduced glucose tolerance and increase risk of type 2 diabetes in both women and men.
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How are differences in glucose levels in those prenatally exposed to feminine caused

By functional changes in pancreatic beta cells and changes in sensitivity to insulin in target tissued

What differences were found in atherogenic lipid profile

Men and women exposed to famine in early gestation had more atherogenic lipid profile, disturbed blood coagulation, increased prevalence of cardiovascular disease. No increase in prevalence of stroke. (might be sign of functional changes in liver function) - Those exposed to famine in early gestation had a preference for fatty foods -> fits with the finding of a more atherogenic lipid profile in this group and possibly also the increased prevalence of cardiovascular disease

What were the differences found in blood pressure

- No differences at rest
- Early exposure to famine had increased stress induces elevation in blood pressure (not due to differences in autonomic function)
   o Could reflect their response to everyday stressors and in this way lead to increased wear and tear of cardiovascular system
- Reduced IMT in those exposed to famine during gestation

Differences in cortisol responses to psychological stress test or cortisol profiles after dexamethasone suppression and ACTH1-24 stimulation

- no difference
- also combination of three or more syndrome components, not more often present after prenatal famine exposure

What are the reproductive and transgenerational outcomes

- No differences in sexual orientation and gender identity (maybe due to underreporting)

-  poor nutrition during fetal development, followed by improved nutrition after birth can give rise to a female phenotype characterized by greater reproductive success

- Women exposed to amine in early gestation had increased prevalence of breast cancer -> increased mortality

- Children of mothers exposed to famine were heavier at birth while children of exposed fathers were heavier in adult life -> transgenerational effects of famine exposure through maternal and paternal line

What are other physical outcomes

- famine exposure not associated with prevalence of irritable bowel syndrome

- those exposed to famine in early life more often affected by IBS, probably because of importance of this period for development of immune system

What are the differences we see in mental health and quality of life

- men exposued to famine in early gestation more anxiety and depression

- exposed men lower scores in B15 in conscientiousness compared to controls

- women exposed to famine higher scores on agreeableness

- no difference between exposed and unexposed in perceived stress in daily life

- men and women with famine in early gestation poorer general health than unexposed participants

Difference in genetics and epigenetics

Those exposed had lower glucose levels and lower risk for diabetes if they carried a certain variant compared to exposed participants who carried the other variant

Which lessons were learned from dutch famine birth cohort study

1. Prenatal nutrition affects later health without altering size at birth
--> adaptations that enable the fetus to grow can nevertheless have adverse long term consequences

2. Effects of famine exposure depend on its timing
--> organs and tissues growing most rapidly are most susceptible to variation in diet

Other dutch famine studies

- Found no difference between performance on Stroop task -> was the classical version instead of the computerized version

- Prenatal exposure to Dutch famine associated with increased risk for poorer mental health outcomes and increased risk for psychiatric disorders and addiction

- Lower level of participation in labor market and higher number of hospitalizations among those exposed to famine during gestation

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