Interactive Relations Among Maternal Depressive Symptomatology, Nutrition, and Parenting

Gestational iron supplementation reverses depressive-like behavior in post-partum Sprague Dawley rats: Evidence from behavioral and neurohistological studies

Background

Postpartum depression is a mood disorder that affects about 9–20% of women after child birth. Reports suggest that gestational iron deficiency can cause a deficit in behavioral, cognitive and affective functions and can precipitate depressive symptoms in mothers during the postpartum period. The present study examined the effect of iron supplementation on depressive behavior during postpartum period in a rat model.

Method

Female Sprague-Dawley rats were crossed. Pregnant rats received iron, fluoxetine, desferrioxamine or vehicle throughout the period of gestation. During the postpartum period, mothers from all groups were taken through the open field test (OFT), forced swim test (FST), novelty-induced hypophagia (NIH) and sacrificed for histological examination of the brains.

Results

Results showed that rats treated with iron-chelating agent, desferrioxamine, and vehicle during gestation exhibited increased immobility scores in the FST, increased latency to feed and reduced feeding in the NIH with corresponding decreased number of neurons and dendritic branches in the cortex of the brain. These depression-related effects were attenuated by perinatal iron supplementation which showed decreased immobility scores in the FST comparable to rats treated with fluoxetine, a clinically effective antidepressant. Iron treatment also decreased latency to feeding while increasing feeding behavior in the NIH. Iron-treated dams had a higher number of neurons with dendritic connections in the frontal cortex compared to vehicle- and desferrioxamine-treated groups.

Conclusion

The results suggest that, iron supplementation during gestation exerts an antidepressant-like effect in postpartum Sprague-Dawley rats, attenuates neuronal loss associated with depression and increases dendritic spine density.

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Iron supplementation during gestation exerts an antidepressant-like effect in postpartum Sprague-Dawley rats.

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Iron supplementation during gestation attenuates neuronal loss associated with depression.

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Iron-treated dams had a higher number of neurons with dendritic connections in the frontal cortex.

Parenting styles and types: Breastfeeding attitudes in a large sample of mothers

OBJECTIVE

The importance of breastfeeding for both maternal and infant health is well established. However, it remains the case that only a small percentage of infants are breastfed after the first six months of life. Maternal negative breastfeeding attitudes are associated with a reduced likelihood of breastfeeding an infant, but they are a malleable target for practitioner interventions. By adjusting perceptions, and therefore behaviours within the population, maternal and infant health outcomes may be improved. As such, it is important to understand whether certain types of mother might feel more negatively about breastfeeding. Here. we investigated the relationships between parenting styles, personality traits, and breastfeeding attitudes. In addition, we aimed to address the interrelated nature of parenting styles by identifying 'types' of mother who may feel more negatively about breastfeeding.

DESIGN

A cross-sectional survey was used in order to measure parenting styles, personality traits, and attitudes to breastfeeding.

PARTICIPANTS

A sample of 1,347 mothers (age M = 31.4 years, SD = 7.4 years) participated. Recruitment took place through online mother and baby groups based predominantly in the United Kingdom.

RESULTS

More permissive and less uninvolved mothers felt positively about breastfeeding, but limited associations between personality factors and breastfeeding attitudes were found. We applied a cluster analytical approach to investigate whether there were particular 'types' of mothers in our sample, and if these showed systematic differences. Our analyses revealed two profiles, best described as 'high nurturance' (high scoring on authoritative and permissive) and 'low nurturance' (low scoring on these dimensions). These two types of mother showed significant differences along all four parenting styles, and our 'high nurturance' type was more conscientious and emotionally stable, and felt more positively about breastfeeding.

CONCLUSIONS

Parenting styles were associated with breastfeeding attitudes. Through identifying an underlying nurturance dimension that best explains differences in parenting styles across mothers, we provide a potential avenue to improving breastfeeding attitudes. By focussing on 'low nurturance' mothers in particular, professionals may be able to provide interventions to improve breastfeeding attitudes and, as a result, address low rates of breastfeeding in the UK.

Nutrients and perinatal depression: a systematic review

Pregnancy and lactation deplete nutrients essential to the neurotransmission system. This may be one reason for the increased risk of depression during the perinatal period. The objective of the present review was to systematically review the literature and summarise evidence on whether blood nutrient levels influence the risk of perinatal depression. PubMed, EMBASE and CINAHL databases were searched for studies of any design. A total of twenty-four articles of different designs were included, representing 14 262 subjects. We extracted data on study population, depression prevalence, nutrients examined, deficiency prevalence, timing of assessment, reporting, analysis strategy and adjustment factors. In all, fourteen studies found associations of perinatal depression with lower levels of folate, vitamin D, Fe, Se, Zn, and fats and fatty acids, while two studies found associations between perinatal depression and higher nutrient levels, and eight studies found no evidence of an association. Only ten studies had low risk of bias. Given the methodological limitations and heterogeneity of study approaches and results, the evidence for a causal link between nutritional biomarkers and perinatal depression is still inconclusive. High-quality studies in deficient populations are needed.

Multiple Biomarkers of Maternal Iron Predict Infant Cognitive Outcomes

This study examined relations between multiple measures of maternal iron status assessed 3 months post-partum, and infant processing speed (longest look during visual habituation), memory (novelty preference), attention (heart rate changes), and neural response variability (in auditory event-related potentials) at 3 and 9 months. Plasma iron was associated with 9-month novelty preference and longest look, and developmental changes in longest look. Hemoglobin predicted sustained attention, and both plasma iron and soluble transferrin receptors predicted neural response variability at 9 months. Improved maternal iron appears to have a positive impact on infant cognitive development even in a well-nourished, low-risk sample.

Effect of short-term food restriction on iron metabolism, relative well-being and depression symptoms in healthy women

AIM

The idea that iron deficiency anemia can be recognized in depressive patients has been around for a few years, as well as negative association between ferritin levels and depression. Iron deficiency anemia, associated with low iron intake, has been observed in women using restriction diets, for example in vegetarians or anorexics. There are no data on the influence of the short-term food restrictions, observed for example in slimming women, on iron management and its connection with behavior expressed via changes in the subject's emotional state.

MATERIALS AND METHODS

This study describes the effect of one- and two-day food restrictions (every 8 days for a period of 48 days) on selected iron management parameters in the serum and blood of 46 healthy volunteer women (23 in each group), aged 25.5 ± 3.0 years, in association with the subjects' self-described emotional status and depression symptoms. The association between iron parameters and depression was also analyzed.

RESULTS

Results show that short-term (2 days) fasting significantly decreases iron concentrations in serum and hair, as well as levels of ferritin, hemoglobin, hematocrit, red blood cells, and total iron binding capacity, but the short-term fasting did not influence the other iron management parameters. Each model of food restrictions also increased negative feelings towards depression. A significant negative correlation between serum ferritin levels and depression was found in women who starved for 2 days.

CONCLUSIONS

The study shows that, through an impact on mineral levels, even short-term food restrictions, as observed in many slimming women and girls, can be a reason for iron deficiency and also can alter the emotional status of healthy women. Maybe depression symptoms in anorexia or other eating disorders patients can be associated with iron deficiencies.