PALTEM: What Parameters Should Be Collected in Disaster Settings to Assess the Long-Term Outcomes of Famine?

The hunger strikes back: an epigenetic memory for autophagy

Historical and demographical human cohorts of populations exposed to famine, as well as animal studies, revealed that exposure to food deprivation is associated to lasting health-related effects for the exposed individuals, as well as transgenerational effects in their offspring that affect their diseases' risk and overall longevity. Autophagy, an evolutionary conserved catabolic process, serves as cellular response to cope with nutrient starvation, allowing the mobilization of an internal source of stored nutrients and the production of energy. We review the evidence obtained in multiple model organisms that support the idea that autophagy induction, including through dietary regimes based on reduced food intake, is in fact associated to improved health span and extended lifespan. Thereafter, we expose autophagy-induced chromatin remodeling, such as DNA methylation and histone posttranslational modifications that are known heritable epigenetic marks, as a plausible mechanism for transgenerational epigenetic inheritance of hunger.

Early life famine exposure and anthropometric profile in adulthood: a systematic review and Meta-analysis

Background

Previous famine studies reported the association between early life famine exposure and adulthood anthropometric profile. However, the findings were variable. Thus, a systematic review and meta-analysis was conducted to clarify the association of famine exposure in early life with the anthropometric profiles in adults.

Methods

Potentially relevant studies were searched through Scopus, Medline, Google Scholar and Google for gray literature and reference lists of previous studies. The random effects model (REM) and I² test was used to adapt the pooling method and assess heterogeneity, respectively.

Results

Prenatal famine exposure was associated with increased risk of body mass index [SMD = 0.10 (95% CI: 0.02, 0.18)], waist circumference [SMD = 0.21 (95% CI: 0.11, 0.31)] in adults. Likewise, famine exposure during prenatal life was associated with decreased adult height [SMD) = − 0.26 (95% CI: − 0.44, − 0.09)]. Moreover, famine exposure during early childhood was associated with increased risk of waist circumference [SMD = 0.09 (95% CI: 0.01, 0.16)] and decreased adult height [SMD = − 0.16 (95% CI: − 0.27, − 0.04)].

Conclusion

Our finding indicates that exposure to famine during early life was associated with the anthropometric profile of adults. In terms of public health significance, the results of the study further underscore the importance of improving the nutritional status of mothers and children to prevent adulthood diseases in the long run.

Systematic review registration number

PROSPERO CRD42020168424

Supplementary Information

The online version contains supplementary material available at 10.1186/s40795-022-00523-w.

Personalized Nutrition Approach in Pregnancy and Early Life to Tackle Childhood and Adult Non-Communicable Diseases

The development of childhood and adult non-communicable diseases (NCD) is associated with environmental factors, starting from intrauterine life. A new theory finds the roots of epigenetic programming in parental gametogenesis, continuing during embryo development, fetal life, and finally in post-natal life. Maternal health status and poor nutrition are widely recognized as implications in the onset of childhood and adult diseases. Early nutrition, particularly breastfeeding, also plays a primary role in affecting the health status of an individual later in life. A poor maternal diet during pregnancy and lack of breastfeeding can cause a nutrient deficiency that affects the gut microbiota, and acts as a cofactor for many pathways, impacting the epigenetic controls and transcription of genes involved in the metabolism, angiogenesis, and other pathways, leading to NCDs in adult life. Both maternal and fetal genetic backgrounds also affect nutrient adsorption and functioning at the cellular level. This review discusses the most recent evidence on maternal nutrition and breastfeeding in the development of NCD, the potentiality of the omics technologies in uncovering the molecular mechanisms underlying it, with the future prospective of applying a personalized nutrition approach to prevent and treat NCD from the beginning of fetal life.

The changing face of hunger: from fasting to the concept of atherogenesis

The history of hunger is a story about natural disasters and wars, but, on the other hand, also about the investigation of evolutionary defense mechanisms concerning quantitative food shortages. The article presents how fasting and the experimental starving oriented the development of physiology, and it is based on a comparative analysis of monographs and articles on starvation in the medical context from library collections and the PubMed database. Over the centuries, doctors have believed that fasting has a beneficial effect on health, and they recommended a restrictive diet during an illness. In the 19th century, the growth of modern physiology was determined by experimental fasting of human subjects and animals. Furthermore, undernourishment and chronic hunger in large populations were recognized as a threat to public health for the first time. During both world wars, depriving civilians of food became a strategy of combat and a method of genocide. The mass nature of war hunger motivated doctors to research the pathophysiology of starvation and refeeding of emaciated people, even in the ghetto or concentration camps. After the Second World War, the invention of the scanning electron microscope enabled systematic studies on the effects of starvation on the human body. As a result, the pathogenesis of atherosclerosis and the cellular metabolism of cholesterol at the submolecular level were clarified. At the turn of the 21st century, the research on the metabolic response to starvation shed new light on atherogenesis and the link between lipid and carbohydrate metabolism.

Effects of prenatal exposure to the 1983-1985 Ethiopian great famine on the metabolic syndrome in adults: a historical cohort study

The Ethiopian great famine was one of the severe forms of global famines ever documented in Africa as well as in the recent history of the world. Earlier famine studies, as natural experiments, had tested the association between prenatal famine exposure and the metabolic syndrome and reported heterogeneous findings. Hence, this study aimed at evaluating the effects of prenatal exposure to the 1983-1985 Ethiopian great famine on the metabolic syndrome in adults. Self-reported birth date and age of the study subjects were used to classify the status of famine exposure. The International Diabetes Federation criterion was used to assess the metabolic syndrome. Multivariable logistic regression models were fitted to examine relationship between prenatal famine exposure and the metabolic syndrome. The findings showed that, adjusted for covariates, adults who had prenatal exposure to famine were 2·94 times more likely to develop the metabolic syndrome compared with non-exposed groups (adjusted OR (AOR) 2·94, 95 % CI 1·66, 5·27). More specifically, famine exposure during prenatal life was associated with increased waist circumference (AOR 2·27 cm, 95 % CI 0·28, 4·26), diastolic blood pressure (AOR 2·47 mmHg, 95 % CI 0·84, 4·11), TAG (AOR 0·20 mmol/l, 95 % CI 0·10, 0·28) and fasting blood glucose (AOR 0·24 mmol/l, 95 % CI 0·04, 0·43) compared with the control groups. Higher proportion of the metabolic syndrome, risky anthropometric and dyslipidaemic parameters were observed among exposed groups. This finding adds further evidence on fetal origin of adult diseases hypothesis. The finding may imply that one potential means of preventing adulthood metabolic syndrome is to optimise maternal nutrition during pregnancy.