Faculty Bibliography

Fetal iron status has long-lasting effects on neurodevelopmental outcomes and risk of psychopathology. Although prenatal exposure to maternal psychological stress has been linked to offspring peripheral iron status at birth, it is unknown whether maternal prenatal stress is related to fetal brain iron during gestation. We utilized 86 multi-echo functional magnetic resonance imaging (fMRI) scans from 52 fetuses (23 females; gestational age [GA] 24-38 weeks) to estimate R2* relaxometry as a proxy for fetal brain iron levels. Our results showed that greater maternal anxiety symptoms were associated with higher estimated fetal iron levels in the left cerebellar vermis after controlling for fetal sex and GA. Our finding suggests that fetal brain iron levels may be sensitive to exposure to maternal stress in utero. In a subset of participants with available infant outcome data (n = 31), no significant associations were found between fetal brain iron levels and later cognitive, language, and motor development during infancy. Overall, this study presents the first evidence of associations between maternal prenatal stress and fetal brain iron, which lays the groundwork for future investigations of biological embedding of prenatal maternal stress on the fetal brain and later neurodevelopment through prenatal iron accumulation as a potential mechanism.

The COVID-19 pandemic catalyzed a rapid expansion of telemedicine across the United States, expanding access to video-based services but also raising concerns about equitable access, use, and experience among minority populations. This mixed-methods scoping review quantitatively describes patterns of video-based telemedicine utilization and qualitatively evaluates factors impacting utilization among racial/ethnic minorities in the United States during the COVID-19 pandemic. We conducted a comprehensive literature search across six databases for studies published between January 2020 and March 2023. Eligible studies reported on telehealth or telemedicine use, specifically video-based visit utilization among racial/ethnic minorities. Reviewers independently screened studies, extracted data, and synthesized findings using an integrated mixed-methods approach. Of 1801 studies, 77 studies met the inclusion criteria. Of these, a majority were published in metropolitan coastal areas, and most were heterogeneous in their definition of telemedicine and utilization. Quantitatively, 33 studies (42.9%) reported increased use of video-based telemedicine, 29 (37.7%) reported decreased use, and 15 (20%) reported variable use across racial/ethnic subgroups. Most studies assessed disparities among non-Hispanic Black and Hispanic/Latinx populations (73 and 66 studies, respectively), while fewer examined disparities among other minority populations (45 studies). Factors associated with telemedicine adoption included patient- and community-level digital access barriers, low organizational digital capacity and infrastructure, implicit bias, and inadequate provider education and training. Identified facilitators included trust and awareness of telemedicine, adequate provider training, cultural and linguistic adaptations, targeted internet subsidies, and telemedicine reimbursements. Video-based telemedicine utilization among racial/ethnic minorities during the COVID-19 pandemic was heterogeneous, influenced by individual, systemic, and implementation factors. Disparities were most pronounced among Asians and other minority populations. Despite increased attention and efforts to address access barriers, our findings highlight the need for more targeted, culturally and structurally tailored interventions to improve digital inclusion.

Fetal iron status has long-lasting effects on neurodevelopmental outcomes and risk of psychopathology. Although prenatal exposure to maternal psychological stress has been linked to offspring peripheral iron status at birth, it is unknown whether maternal prenatal stress is related to fetal brain iron during gestation. We utilized 86 multi-echo functional magnetic resonance imaging (fMRI) scans from 52 fetuses (23 females; gestational age [GA] 24-38 weeks) to estimate R2* relaxometry as a proxy for fetal brain iron levels. Our results showed that greater maternal anxiety symptoms were associated with higher estimated fetal iron levels in the left cerebellar vermis after controlling for fetal sex and GA. Our finding suggests that fetal brain iron levels may be sensitive to exposure to maternal stress in utero. In a subset of participants with available infant outcome data (n = 31), no significant associations were found between fetal brain iron levels and later cognitive, language, and motor development during infancy. Overall, this study presents the first evidence of associations between maternal prenatal stress and fetal brain iron, which lays the groundwork for future investigations of biological embedding of prenatal maternal stress on the fetal brain and later neurodevelopment through prenatal iron accumulation as a potential mechanism.

OBJECTIVE:Guatemala has one of the highest rates of maternal mortality in Central America. A total of 60% of births in Guatemala are attended by traditional Mayan birth attendants, or comadronas. Their prevalence in these communities makes them a valuable resource to bridge home births with safe prenatal care. The objective of this study was to evaluate a low-cost prenatal care training program for Guatemalan comadronas with the goal of improving maternal health outcomes in the region. METHODS:In this retrospective longitudinal cohort study, we examined the knowledge retention of comadronas enrolled in a 12-month prenatal care training program known as the School of PowHER (SOP). Recruited from the Lake Atitlán region of Guatemala by Saving Mothers, 501(c)(3) and the Guatemalan Ministry of Health, comadronas participated in a four-month didactic curriculum followed by a nine-month clinical curriculum. Pre- and post-tests were administered to assess learning outcomes over the study's duration (2014-2022), and test results were evaluated to assess the effectiveness of the SOP. RESULTS:A total of 123 women were recruited and enrolled in all eight graduating classes of the SOP from 2014, 2016-2019, and 2021-2022. An average, statistically significant improvement in didactic and clinical pre- and post-test scores was found across all years analyzed. CONCLUSION/CONCLUSIONS:The SOP is a low-cost, culturally appropriate, community-based model that empowers comadronas through knowledge and skill acquisition to improve local maternal health outcomes. This program proves effective at not only teaching comadronas prenatal health information and clinical skills, but also at promoting long-term retention of these skills.

BACKGROUND:Neighborhood quality may contribute to child mental health, but families with young children often move, and residential instability has also been tied to adverse mental health. This study's primary goal was to disentangle the effects of neighborhood quality from those of residential instability on mental health in middle childhood. METHODS:1,946 children from 1,652 families in the Upstate KIDS cohort from New York state, US, were followed prospectively from birth to age 10. Residential addresses were linked at the census tract level to the Child Opportunity Index 2.0, a multidimensional indicator of neighborhood quality. The number of different addresses reported from birth to age 10 was counted to indicate residential instability, and the change in COI quintile indicated social mobility. Parents completed three assessments of attention-deficit/hyperactivity disorder, problematic behavior, and internalizing psychopathology symptoms at ages 7, 8, and 10. Child and family covariates were selected a priori to adjust sample characteristics, increase estimate precision, and account for potential confounding. RESULTS:In unadjusted models, higher neighborhood quality at birth was associated with fewer psychopathology symptoms in middle childhood, but associations were largely mediated by residential instability. In adjusted models, residential instability was associated with more psychopathology symptoms, even accounting for social mobility. Neighborhood quality at birth had indirect effects on child mental health symptoms through residential instability. CONCLUSIONS:Children born into lower-quality neighborhoods moved more, and moving more was associated with higher psychopathology symptoms. Findings were similar across different timings of residential moves, for girls and boys, and for children who did not experience a major life event. Additional research is needed to better understand which aspects of moving are most disruptive to young children.

Response to immune checkpoint inhibitors (ICIs) in metastatic melanoma (MM) varies among patients, and current baseline biomarkers predicting treatment outcomes are limited. As mitochondrial (MT) metabolism has emerged as an important regulator of host immune function, we explored the association of host MT genetics (MT haplogroups) with ICI efficacy in 1,225 ICI-treated patients with MM from the clinical trial CheckMate-067 and the International Germline Immuno-Oncology Melanoma Consortium. We discovered and validated significant associations of MT haplogroup T (HG-T) with resistance to anti-programmed cell death protein-1-based ICI (both single-agent and combination) and have shown that HG-T is independent from established tumor predictors. We also found that patients belonging to HG-T exhibit a unique nivolumab-resistant baseline peripheral CD8⁺ T cell repertoire compared to other MT haplogroups, providing, to our knowledge, the first link between MT inheritance, host immunity and ICI resistance. The study proposes a host blood-based biomarker with stand-alone clinical value predicting ICI efficacy and points to an ICI-resistance mechanism associated with MT metabolism, with clinical relevance in immuno-oncology.