Association of maternal migrant background with inflammation during pregnancy - Results of a birth cohort study in Germany

Psychosocial and neurobiological aspects of the worldwide refugee crisis: From vulnerability to resilience

Anisman, H., Doubad, D., Asokumar, A. & Matheson, K. Psychosocial and neurobiological aspects of the worldwide refugee crisis: From vulnerability to resilience. NEUROSCI BIOBEHAV REV, XXXX. Immigration occurs between countries either to obtain employment, for family reunification or to escape violence and other life-threatening conditions. Refugees and asylum seekers are often obligated to overcome a uniquely challenging set of circumstances prior to and during migration. Settlement following immigration may pose yet another set of stressors related to acculturation to the host country, as well as financial insecurity, discrimination, language barriers, and social isolation. Here we discuss the multiple consequences of immigration experiences, focusing on the health disturbances that frequently develop in adults and children. Aside from the psychosocial influences, immigration-related challenges may cause hormonal, inflammatory immune, and microbiota changes that favor psychological and physical illnesses. Some biological alterations are subject to modification by epigenetic changes, which have implications for intergenerational trauma transmission, as might disruptions in parenting behaviors and family dysfunction. Despite the hardships experienced, many immigrants and their families exhibit positive psychological adjustment after resettlement. We provide information to diminish the impacts associated with immigration and offer strength-based approaches that may foster resilience.

Perinatal Outcomes of Immigrant Mothers and Their Infants Born Very Preterm across Germany

BACKGROUND

In Germany, more than 40% of infants are born to immigrant parents. Increased survival rates of very preterm (below 32 weeks gestation at birth; VP) infants have not resulted in equally improved life chances and quality of life. More information on perinatal variations in outcomes according to social inequalities, migration background, and language barriers is needed. We tested whether mothers' immigrant status and language barriers are associated with perinatal health and short-term neonatal outcomes.

METHODS

The data are from the national multi-centre German Neonatal Network (GNN) cohort, including VP births from 2009 onwards. In total, 3606 (n = 1738 female) children were assessed, and 919 (n = 449 female) of these children had immigrant backgrounds. Immigrant status was operationalised as a binary variable based on the children's mothers' countries of birth (born in Germany vs. foreign-born). Self-reported home language (L1) was used to calculate the average linguistic distance to German as one continuous variable.

RESULTS

Mixed-effects models showed that two out of fourteen effects of interest survived the adjustment for known confounders and accounting for the nestedness of data within birth hospitals. Linguistic distance from mothers' L1s to German was independently associated with diagnoses of preeclampsia (OR = 1.01, 95% CI = [1.00, 1.01]). Infants of foreign-born mothers had higher odds for amniotic infection syndrome (AIS; OR = 1.45 [1.13, 1.86]) than infants of German mothers.

CONCLUSIONS

Our findings from this large multi-centre longitudinal cohort of VP-born children indicate that maternal immigrant status and language barriers have limited impact on perinatal health and severe neonatal outcomes. This suggests that, regardless of background or language skills, there may be few inequalities in the perinatal health of pregnant women and their newborn preterm infants.

Perceived stress and depressive symptoms during pregnancy and postpartum in Turkish-origin women living in Germany

OBJECTIVE

People of Turkish origin (also referred to as "with a Turkish migrant background") are one of the largest migrant groups in Germany and show disparities across different stress-related health outcomes. Specifically, women of Turkish origin in Germany have a greater risk for some mental health issues and adverse pregnancy and birth outcomes compared to women without migrant background. We tested differences between women of Turkish origin and women without migrant background in self-reported pregnancy and postpartum stress experiences and depressive symptoms.

METHODS

32 women of Turkish origin (mean age 29.7 years) and 77 women without migrant background (mean age 32 years) participated in a multi-site prospective cohort study with two study visits during pregnancy and one month postpartum. Women provided sociodemographic data and completed the Perceived Stress Scale (PSS) and the Center for Epidemiology - Depression (CESD) scale at each study visit.

RESULTS

Using hierarchical linear models, we found that women of Turkish origin (both first and second generation) reported more perceived stress (b = 0.57, CI: 0.29-0.84, p < 0.001) and depressive symptoms (b = 0.32, CI = 0.14-0.49, p < 0.001) compared to women without migrant background across gestation. A linear regression analysis showed that there was also a significant difference in depressive symptoms at one month postpartum (b = 0.35, CI = 0.03-0.66, p < 0.05).

CONCLUSION

Tailored psychosocial interventions are needed to address mental health needs of pregnant Turkish origin women and to intervene on the possible transmission of stress-related health disadvantages to their offspring.

[Life course epidemiology in migrant health research]

From free choice to forced flight, there are many reasons for migration. Accordingly, the backgrounds and living conditions of migrating people are also diverse. The different associated exposures affect the health of migrants and their children. To capture such a complex phenomenon, an approach is required that takes specific living conditions during the life course of migrants into account.An established methodological approach that can accomplish this is life course epidemiology. When applied to migrating populations, it examines exposures before, during, and after migration. In epidemiological research on the health of migrant populations, it is desirable to consider all three phases. This is countered by the fact that reliable data on the entire life course is not always available.A valid, timely collection and data protection-compliant linkage of longitudinal data from different sources can improve life course-related research on the health of migrants in Germany. In the future, corresponding data should also be included from the countries of origin of migrants.

Exploring the Significance of Legal Status on Refugees' and Asylum Seekers' Access to Health Care in Germany-A Mixed-Method Study

Objectives: The study aims to investigate the significance of legal status for well-being and access to and use of needs-based health care by asylum seekers and refugees in Germany. Methods: Using a mixed-method-design, we first conducted a cross-sectional study to explore access to health care and unmet needs of refugees and asylum seekers and legal status. Data were analysed using descriptive statistics. For the qualitative study a heterogeneous sample was recruited from the quantitative data. Interviews were analysed using a deductive-inductive approach. Results: Quantitative results showed that health care utilisation was associated with an unsecure legal status but not with unmet care needs. The in-depth qualitative study revealed that the legal status determines experiences of structural violence that can negatively affect well-being and associated access to health care. Conclusion: An insecure legal status can affect access to health care for refugees and asylum seekers. In order to improve health, changes in living conditions and the removal of access barriers are necessary.

Diurnal cortisol variation during pregnancy in Turkish origin and non-migrant women in a German birth cohort study

BACKGROUND

Immigrants from Turkey experience health disadvantages relative to non-immigrant populations in Germany that are manifest from the earliest stages of the lifespan onwards and are perpetuated across generations. Chronic stress and perturbations of stress-responsive physiological systems, including the hypothalamus-pituitary-adrenal (HPA)-axis, are believed to in part mediate this relationship. Cortisol plays an important role in the association between maternal stress during pregnancy and many pregnancy-, birth- and offspring-related outcomes. We therefore examined whether maternal migrant background is associated with diurnal cortisol variation during pregnancy.

METHODS

109 pregnant women (incl. n = 32 Turkish origin women) that participated in a multi-site prospective cohort study in Germany collected saliva samples across the day on two consecutive days around 24 and 32 weeks gestation. Hierarchical linear models were applied to quantify associations between migrant background and diurnal cortisol variation across pregnancy.

RESULTS

Women of Turkish origin exhibited a significantly lower cortisol awakening response (CAR) and a flatter diurnal cortisol slope (DCS) compared to non-migrant women after adjusting for household income. These relationships between migrant status and diurnal cortisol variation were mainly driven by 2nd generation migrants.

DISCUSSION

A potential HPA axis dysregulation of Turkish-origin pregnant women may contribute to the intergenerational transmission of health disadvantages in this group.

Exposure to childhood maltreatment and systemic inflammation across pregnancy: The moderating role of depressive symptomatology

BACKGROUND

Childhood maltreatment (CM) has long-term consequences for dysregulation of the immune system which is particularly pronounced when mental and physical health sequelae have manifested. Higher proinflammatory state has been shown in non-pregnant state in association with CM as well as with depression, one of the most frequent and pernicious psychiatric sequelae of CM. During pregnancy, however, this association is less clear. Given the important role of maternal inflammatory state during pregnancy for fetal, pregnancy, and birth outcomes, we sought to examine the association between CM and proinflammatory state during pregnancy considering the moderating role of maternal depressive symptoms characterized serially across pregnancy.

METHODS

A prospective, longitudinal study of 180 healthy pregnant women was conducted with serial assessments in early (12.98 ± 1.71 weeks gestation), mid (20.53 ± 1.38 weeks gestation) and late (30.42 ± 1.4 weeks gestation) pregnancy. Maternal history of CM was assessed with the Childhood Trauma Questionnaire (CTQ) and the total score was used as an indicator of CM experience. Maternal depressive symptoms were assessed at each pregnancy visit with the Center for Epidemiologic Studies Depression Scale (CES-D). Serum concentrations of tumor necrosis factor (TNF)-α and interleukin (IL)-6 were obtained at each pregnancy visit and combined to a composite maternal proinflammatory score. Linear mixed effects models were employed to assess the association between CTQ score, CES-D score, and proinflammatory score during pregnancy, adjusting for potential confounders.

RESULTS

Gestational age was associated with the proinflammatory score (B = 0.02; SE = 0.00; p < .001), indicating an increase in inflammation across gestation. Neither CTQ score nor depressive symptoms were independently associated with the proinflammatory score (ps > 0.28). However, the interaction between CTQ score and depressive symptoms was associated with the proinflammatory score (B = 0.03, SE = 0.01, p < .05), indicating higher inflammation across pregnancy with increasing levels of depressive symptoms during pregnancy in women with higher CTQ scores. Exploratory analyses suggested that this interaction was mainly driven by CTQ subscale scores assessing experiences of abuse rather than neglect.

CONCLUSIONS

These findings suggest a moderating role of maternal depressive symptoms during pregnancy on the association of early life stress with inflammation and thus highlight the importance of the timely assessment of both CM exposure and depressive symptoms which might allow for the development of targeted and individualized interventions to impact inflammation during pregnancy and to ameliorate the detrimental long-term effects of CM. The current findings add to a better understanding of the prenatal biological pathways that may underlie intergenerational transmission of maternal CM.

Psychoneuroimmunology in the context of perinatal depression - Tools for improved clinical practice

Maternal mental health spans in a temporary manner from pre-conception through the phases of pregnancy, childbirth, and the postpartum period (i.e., perinatal). The psychoneuroimmunology (PNI) field has made important contributions to the knowledge of the pathophysiology of poor perinatal mental health, but the PNI lens could be used more broadly to inform clinical practice. This review argues that PNI holds the key to several important aspects of variations in mental health for pregnant and postpartum women. This review describes existing knowledge from studies on immune activation in maternal depression during pregnancy and postpartum, and other important features such as stress reactivity, the microbiome, and its metabolites. The importance of objective measures for screening and prediction is discussed as well as the need for novel therapeutics to treat poor mental health in the perinatal period. The PNI framework could thus be further applied to inform research about the mechanisms of perinatal psychiatric morbidity, which could pave the way for future precision medicine for perinatal mental health issues.