Discrimination Against Immigrant Latina Mothers Associated With Pro-Inflammatory Gene Expression in Their Preschool-Aged Children

Abstract

Background: For immigrant mothers navigating the challenges of an unfamiliar sociopolitical landscape, the burden of discrimination extends beyond their personal experiences. Over time, cumulative exposure to discrimination may shape the environments in which young children grow and develop, with potential biological effects across the lifespan. Objectives: This cross-sectional observational study examined (1) whether maternal experiences of post-migration discrimination in the past year are associated with pro-inflammatory gene expression in their preschool-aged children, and (2) the potential contributing roles of maternal depressive symptoms and child body mass index (BMI). Methods: Immigrant Latina mothers completed sociodemographic and psychosocial measures (acculturation, discrimination, depressive symptoms). Buccal swabs were collected from children to assess mRNA expression of pro-inflammatory genes (IL-8, IL-1β), and child BMI was measured. Analyses included 70 mother–child dyads with ≥1 valid biomarker. We fit a multivariate model with correlated residuals across biomarkers to test associations between experiences of maternal discrimination and child gene expression. Results: Most mothers (69%) reported experiencing discrimination in the past year, primarily due to race or ancestry. Children whose mothers reported more frequent experiences of discrimination had higher IL-8 (B = .05, SE = .01, p < .001) and IL-1β (Β = .03, SE = .01, p = .03) mRNA expression. Associations persisted after adjusting for maternal depressive symptoms and child BMI. Conclusions: Early life experiences that devalue immigrants and their children may be critical predictors of health disparities that develop after migration. Cultivating welcoming environments for immigrant families may help support children’s potential and broader community resilience.

Keywords

maternal discrimination immigrant families early childhood inflammation gene expression Latina mothers

For immigrant mothers navigating the challenges of an unfamiliar sociopolitical landscape, the burden of discrimination often extends beyond their own experiences. Over time, cumulative exposure to discrimination may influence the environments in which young children grow and develop, with potential biological effects across the lifespan.(Shonkoff et al., 2021). Chronic conditions such as depression and cardiovascular disease, along with their underlying stress biomarkers, often worsen in second-generation Latino immigrants compared to their foreign-born parents (Fox et al., 2015; Scholaske et al., 2021). Although the biological foundations of these conditions are laid early in life (Miller et al., 2011), the role of postmigration adversity during early childhood has been largely overlooked. Psychobiological research with immigrant populations (Anisman et al., 2024) and studies of discrimination (Curenton et al., 2024) have both focused primarily on school-aged children and adolescents, limiting opportunities to intervene during sensitive early developmental periods.

Guided by two developmental theories, the Linked Lives principle and the Biological Embedding of Childhood Adversity Model, we examine the extent to which mothers’ experiences of discrimination in the past year may be related to transcriptional stress biomarkers in their preschool-aged children (3–5 years old).

Linked Lives

Linked Lives, a cornerstone of life course theory, proposes that family members’ lives are interdependently lived within the socio-historical and -political context, an interdependence that may connect families across generations (Elder, 1998). These interconnections are more likely to shape life trajectories during sensitive developmental periods and consequential life transitions, such as immigration (Elder, 1998). In this way, immigration-related stress, particularly exposure to post-migration discrimination, may mutually influence maternal and child well-being through shared environmental influences. Although some immigration-related stressors may diminish over time, discrimination may be recognized and felt most profoundly for immigrant families who have most acculturated to the destination country (Flippen & Parrado, 2015; Velásquez et al., 2024).

Interpersonal discrimination refers to unfair treatment that restricts access to resources and opportunities based on perceived social group membership, including race and immigration status; it may be experienced directly or indirectly, such as through caregiver stress (Shonkoff et al., 2021). For immigrants who have been racialized (i.e., assigned to a racial or ethnic category) in the destination country, discrimination is a critical facet of acculturative stress—the challenges immigrants face post-migration as they adapt to the host country.

Discrimination is considered one of the most predominant acculturative stressors and is consistently associated with high levels of psychological distress (Cervantes et al., 2016). As a pervasive and uncontrollable emotional threat, these experiences increase both parenting stress (Condon et al., 2022) and economic strain, particularly among immigrant mothers of young children (Ettinger de Cuba et al., 2025). Discrimination may also exacerbate the social isolation mothers may experience when raising a child far away from familial support and cultural traditions (Lim et al., 2022). In turn, heightened maternal stress and psychological distress can disrupt the quality of the mother-child relationship, including attachment, which scaffolds a young child’s emerging self-concept and social and emotional skills (Bowlby, 1980). Taken together, these interrelated experiences reflect the intergenerational transmission of discrimination-related stress embedded within broader social environments.

By preschool age, Latino children may also witness discrimination against caregivers or experience it themselves (Barajas-Gonzalez et al., 2022; Cervantes et al., 2018). These experiences may continue to shape a child’s sense of self and the social safety of the world (Cervantes et al., 2018; Heard-Garris et al., 2018). In these contexts, children may also develop negative schemas about the social safety of their surroundings and their self-worth — processes that may be bi-directionally linked to immune activation (Slavich, 2020).

Biological Embedding of Childhood Adversity

Toxic stress occurs when a child is chronically exposed to intense stress without sufficient support, as seen in the context of interpersonal and structural discrimination (Cervantes et al., 2018; Shonkoff et al., 2021). According to the Biological Embedding of Childhood Adversity Model, toxic stress can become embedded in the developing hypothalamic-pituitary-adrenal (HPA) and immune axes during early childhood, with implications for lifelong well-being (Miller et al., 2011). The HPA axis, responsible for coordinating the stress response, releases cortisol during threats, which typically suppresses excessive immune activity and restores balance. However, adverse environments can impair this recovery by reducing glucocorticoid receptor activity, prolonging stress responses, and increasing the production of proinflammatory proteins (e.g., IL-8, IL-1β, TNF-α) from the immune system (Nusslock & Miller, 2016).

The relationship between toxic stress and immune dysregulation (i.e., inflammation) has been detected in early childhood (Measelle & Ablow, 2018; Nelson et al., 2020; Tyrka et al., 2015), a period of heightened neuro-immune plasticity (Danese & J Lewis, 2017). Furthermore, in two studies thus far, maternal experiences of ethnic and racial discrimination have been linked to elevated levels of inflammatory proteins in school-aged children (Condon et al., 2019; Slopen et al., 2019). These associations have persisted even after adjusting for maternal depressive symptoms and child body mass index (BMI), a correlate of low-grade inflammation (Slopen et al., 2019). At a transcriptional level, pro-inflammatory mRNA transcripts may be upregulated in response to children’s exposure to and risk for toxic stress (Cole, 2019). Animal models suggest that toxic stress may become embedded in the transcriptome of immune cells as early as the postnatal period (Cole et al., 2012). By adulthood, a pro-inflammatory phenotype underlies most chronic health conditions, contributing to the leading causes of morbidity and mortality worldwide (Furman et al., 2019).

Guided by the Linked Lives principle and the Biological Embedding of Childhood Adversity model, we pursued two a priori aims. First, we tested whether maternal post-migration discrimination was associated with preschoolers’ pro-inflammatory mRNA expression of IL-8 and IL-1β. Second, we evaluated the robustness of these associations by examining whether they attenuated after accounting for maternal depressive symptoms and child BMI.

Methods

Study Design

We conducted a cross-sectional observational study to examine the associations between Latina mothers’ experiences of discrimination and their preschoolers’ pro-inflammatory gene expression. Data were collected May 2022–August 2023 via community-based recruitment. The study was approved by the University of North Carolina Chapel Hill (UNC-CH) Institutional Review Board (IRB).

Sample and Setting

A community-based sample was recruited from 14 counties in North Carolina through health clinics, cultural festivals, the Mexican consulate, resource fairs, snowball sampling, prior studies, and presentations to community stakeholders. Ninety-two foreign-born Latina mother–child dyads enrolled, as previously described (Alvarado-Harris et al., 2025). Mothers were eligible if they were ≥18 years, self-identified as Latina, co-resided with the child, spoke English or Spanish, and provided informed consent. Dyads without valid biomarker data (failed amplification of IL-8 and/or IL-1β mRNA) were excluded; exclusions were unrelated to measured participant characteristics. The final analytic sample comprised 70 dyads with ≥1 valid biomarker (IL-8: n = 64; IL-1β: n = 65). Mother and child characteristics are summarized in Table 1.

Table 1.

Mother-Child Characteristics

	N = 70 mother-child dyads
	n	%	M	SD
Maternal sociodemographic
Maternal age			35.6	6.2
Years living in the US			11.8	7.9
Income
≤ $19,999	18	25.7
$20,000 -- $39,999	17	24.2
$40,000 - $59,999	7	10.0
≥$60,000	5	7.1
No response	23	32.8
Married/Partner	58	82.9
Maternal education
≤Primary school	13	18.5
≤10^th grade	9	12.9
Graduated high school	24	34.3
Some college	9	12.9
≥4-year college degree	15	21.4
Work outside home	26	37.1
Maternal place of birth
Mexico	32	45.7
Central America	21	30.0
South America	13	18.5
Caribbean	3	4.3
Maternal psychosocial
Everyday discrimination scale			5.6	6.2
Everyday discrimination (yes/no)	48	68.6
Discrimination attributions^a
Ancestry and/or race	38	54.3
Education or income levels	7	10.0
Age	3	4.3
Weight	2	2.8
Other	7	10.0
Acculturation			20.7	7.2
Depressive symptoms			5.1	5.2
Child sociodemographic
Child age (months)			51.7	10.8
Child sex (female)	38	54.3
Child stress biomarkers
IL-8 mRNA expression (log)			−0.31	0.94
IL-8 mRNA expression (2^−ΔΔCT)			3.38	10.53
IL-1β mRNA expression (log)			−.35	.77
IL-1β mRNA expression (2^−ΔΔCT)			3.29	16.40
Child body mass index			73.81	23.67

Note. M = mean; SD = standard deviation.

Number and percentage of mothers attributing discrimination to these factors; participants could select more than one attribution.

Measures

Maternal Measures

Maternal Everyday Discrimination

The 9-item Everyday Discrimination Scale (EDS) (Williams et al., 1997) was used to measure the frequency of day-to-day perceived discrimination within the past year. It correlates with measures of institutional racial discrimination and interpersonal prejudice but does not prime the subjects to think about race or ethnicity (Krieger et al., 2005). Participants are asked to rate each item on a 5-point scale (1 = never to 5 = almost every day). Higher scores indicate higher frequency of perceived discrimination. The EDS is validated in Spanish (Park et al., 2018). For this sample, Cronbach’s α = .87.

Child Measures

Child Immune mRNA Expression (IL-8 and IL-1β)

RNA and DNA purification and extraction procedures followed the protocol from the Quick-DNA/RNA™ Microprep Plus Kit (Zymo Research, Irvine, California, USA). IL-8 and IL-1β mRNA levels were determined by real-time quantitative polymerase chain reaction (RT-qPCR) using TaqMan gene expression assays and TaqMan Non-coding RNA Assays (IL-8—assay ID Hs00174103_m1; IL-1β—assay ID Hs01555410_m1; 18S as reference gene—assay ID Hs99999901_s1; and TaqMan Fast Advanced Master Mix (Thermo Fisher) according to the manufacturer’s instructions on a Applied Biosystems Quant Studio 3 RT-PCR Machine. Before real-time PCR, cDNA was synthesized using total RNA and SuperScript IV VILO Master Mix with ezDNase enzyme (Thermo Fisher Scientific) according to the manufacturer’s protocols on an Eppendorf nexus gradient Master cycler. Finally, mRNA levels were measured in relation to that of the reference gene (18S ribosomal RNA as an internal mRNA control) and relative mRNA levels were calculated using the 2^−ΔΔCT method (Livak & Schmittgen, 2001). This method yields a normalized index of gene expression, enabling meaningful comparison across participants. Additional details on cycle threshold (Ct) distributions are provided in Table 2. Plate identifiers were retained and included as random effects to account for inter-plate variation.

Table 2.

Summary of Raw Ct Values for RT-qPCR Assays

Gene	N	Mean Ct	SD	Min	Max
IL-8	64	33.3	2.9	27.9	39.6
IL-1β	65	33.3	3.2	26.6	39.1
18S (reference gene)	80	24.20	4.2	16.20	35

Note. Ct values >38 were considered near the assay’s detection limit; excluding these values did not alter the pattern of results.

Maternal and Child Covariates

Maternal Covariates

Maternal covariates included acculturation, education, and depressive symptoms. Maternal acculturation was measured using the 12-item Short Acculturation Scale for Hispanics (SASH) (Marin et al., 1987). SASH assesses participants’ language use and preference on a 5-point Likert scale (1 = Only Spanish to 5 = Only English). Higher scores indicate greater acculturation (i.e., higher engagement with the English language). For this sample, Cronbach’s α = .89. Maternal education was coded from (1 = Primary school to 6 = Post-graduate degree). Maternal depressive symptoms were measured using the 9-item Patient Health Questionnaire (PHQ-9) (Kroenke et al., 2001), which has been validated in Spanish (Martinez et al., 2023). Participants rate how often they have experienced each item in the preceding two weeks on a 4-point Likert scale (0 = not at all to 3 = nearly every day). The cut-off for clinical depression is ≥10. For this sample, Cronbach’s α = .88.

Child Covariates

We adjusted for child age (months) and sex (female = 1; male = 0). Mothers were asked whether their child had any health conditions; given the low rates of reported diagnoses (asthma, n = 2; autism, n = 3), we included child BMI as the primary child health covariate. Child BMI was calculated from measured height and weight and converted to age- and sex-standardized percentiles using CDC growth charts, with higher percentiles reflecting greater adiposity relative to same-age peers.

Data Collection

Data were collected in person, primarily in participants’ homes (93.5%), by the same bilingual and bicultural researcher to ensure consistency. Self- or researcher-administered questionnaires were completed in English or Spanish based on participant language preference and literacy. All procedures were approved by the UNC-CH IRB, and all mothers provided written informed consent. Given children’s young age (3–5 years old), child assent was not required.

Buccal swab samples for mother and child were collected in tubes containing DNA/RNA shield (Zymo Research, R1106-E). Samples were stored frozen at −80°C at UNC-CH until data collection was completed. Thereafter, samples were transported on dry ice to University of Miami for RNA extraction and biological analyses.

Analytical plan

Power Analyses

Sample size was determined a priori based on hypotheses, feasibility, and assay costs in a hard-to-reach, underrepresented community sample, aiming for 70–96 participants. For a single-outcome multiple regression (α = .05, two-sided), N = 70 affords detection of partial correlations of r = .28 (80% power) and r = .33 (90%), representing moderate-sized effects; smaller effects were underpowered. Joint modeling of IL-8 and IL-1β mRNA levels with correlated residuals did not reduce detectable effects relative to a single-outcome model.

Data Preparation and Assumption Testing

Prior to analysis, biomarker distributions and model residuals were examined for normality and heteroscedasticity. IL-8 and IL-1β mRNA were log-transformed to stabilize variance and approximate normality; Q–Q plots and Shapiro-Wilk tests supported this (IL-8 mRNA: W = 0.98, p = .45; IL-1β mRNA: W = 0.98, p = .22).

Multivariate Models Between Maternal Discrimination and Child Pro-Inflammatory Gene Expression

We fit joint two-outcome (multivariate multiple) regressions for IL-8 and IL-1β mRNA (Gaussian, identity), allowing correlated residuals. We modeled outcomes jointly using full-information maximum likelihood (FIML) under a Missing at Random (MAR) assumption, so that all available cases contributed (analytic N = 70; IL-8 available for 64 children, IL-1β for 65) (Enders & Bandalos, 2001). No predictors or covariates had missing data. All models used robust (sandwich) SEs and included a random intercept for qPCR plate, estimated with Gauss–Hermite quadrature (12 points) to ensure stable convergence. To obtain an overall (omnibus) test of the discrimination effect across IL-8 and IL-1β, we ran a likelihood-ratio (LR) test comparing the joint model with versus without the discrimination paths (df = 2). LR tests were computed under the ML variance estimator (observed information matrix); coefficient CIs use robust (sandwich) SEs. We also report the residual correlation between biomarkers. Multicollinearity was assessed using variance inflation factors (VIFs) from parallel ordinary least squares (OLS) models that included the same covariates.

Model 1 adjusted for random plate effects, child age and sex, and maternal acculturation and education (Cabrera & Hennigar, 2019; Viruell-Fuentes et al., 2012). Model 2 additionally adjusted for depressive symptoms as a sensitivity analysis due to its potential position downstream of discrimination (Berry et al., 2021). Model 3 included child BMI as an additional sensitivity analysis given the relationship between adiposity and proinflammatory gene expression (Ullah et al., 2024). Finally, we conducted exploratory Spearman correlations between plate-adjusted maternal and child mRNA expression values. These analyses were limited to the subset of dyads with both maternal and child biomarkers, (n = 43; IL-1β mRNA) and (n = 40; IL-8 mRNA). All analyses were conducted in Stata (Version 19.5), using an alpha level of .05.

Results

Sample Characteristics

In the analytic sample (N = 70), the average maternal age was 35.6 years old, and most mothers were married or living with a partner (83%); see Table 1. Sixty-nine percent (n = 48) of mothers reported at least one experience of discrimination within the past year, primarily attributed to ancestry or race.

Maternal Discrimination and Child Inflammatory Gene Expression

Multivariate models are presented in Table 3. Model 1 adjusts for qPCR plate, child (age and sex) and maternal (acculturation and education) covariates. Model 2 additionally adjusts for depressive symptoms. Model 3 adds child BMI as a covariate. VIFs for all models ranged from 1.05 to 1.53, below the conservative threshold of 2.5, indicating no concerns regarding multicollinearity. Biomarker residuals were correlated (r = 0.88, p < .001).

Table 3.

Multivariate Models for Child Pro-inflammatory Gene Expression (IL-8 and IL-1β) (N = 70)

Predictors	IL-8 mRNA					IL-1β mRNA
Predictors	B	SE	95% CI	p	β	B	SE	95% CI	p	β
Model 1
Everyday discrimination	.05***	.01	[.02, .07]	<.001	.36	.03*	.01	[.003, .06]	.03	.29
Child age (months)	.01	.007	[−.003, .03]	.13	.13	.006	.008	[−.01, .02]	.46	.09
Child sex^a	−.10	.15	[−.40, .22]	.55	-	−.03	.18	[−.38, .33]	.89	-
Maternal Education	−.11	.06	[−.24, .02]	.10	−.18	−.21	.08	[−.27, .03]	.11	−.24
Maternal acculturation	.02	.01	[−.01, .04]	.26	.12	.02	.02	[.008, .05]	.16	.20
Model 2
Everyday discrimination	.05***	.01	[.02, .07]	<.001	.33	.03*	.02	[.0002, .06]	.049	.27
Child age (months)	.01	.007	[−.004, .02]	.17	.12	.02	.009	[−.01, .02]	.50	.08
Child sex	−.10	.15	[−.41, .21]	.54	-	.08	.18	[−.38, .33]	.91	-
Maternal Education	−.12	.07	[−.26, .01]	.08	−.19	−.12	.08	[−.28, .03]	.10	−.10
Maternal Acculturation	.02	.01	[−.01, .04]	.23	.12	.02	.02	[−.007, .05]	.15	.15
Maternal Depressive symptoms	.01	.02	[−.02, .04]	.49	.06	.006	.02	[−.03, .04]	.76	.04
Model 3
Everyday discrimination	.05**	.01	[.02, .07]	.001	.33	.03*	.02	[.001, .06]	.04	.28
Child age (months)	.01	.008	[−.01, .02]	.21	.11	.003	.01	[−.01, .02,]	.71	.05
Child sex	−.08	.16	[−.40, .23]	.60	-	.001	.18	[−.36, .36]	.99	-
Child body mass index	.001	.004	[−.006, .01]	.75	.03	.004	.004	[−.004, .01]	.32	.13
Maternal education	−.12	.07	[−.25, .01]	.08	−.19	−.12	.08	[−.27, .03]	.13	−.23
Maternal acculturation	.02	.01	[−.01, .04]	.23	.11	.02	.01	[−.007, .05]	.14	.21
Maternal depressive symptoms	.01	.02	[−.02, .04]	.51	.06	.005	.02	[−.03, .04]	.80	.03

Note. B = unstandardized regression coefficient; SE = robust standard error; CI = confidence interval; β = standardized coefficient (continuous variables z-scored).

Bold values indicate statistically significant associations (p < .05). *p < .05, **p < .01, ***p < .001.

Child sex was coded as 1 = female, 0 = male.

Model 1

In Model 1, higher levels of maternal discrimination were associated with higher child IL-8 (B = 0.05, SE = 0.01, 95% CI [.02, .07], p < .001) and IL-1β mRNA expression (B = 0.03, SE = 0.01, 95% CI [0.003, 0.06], p = .03). Including the discrimination paths improved model fit across biomarkers (LR χ²(2) = 16.90, p < .001), indicating that discrimination was jointly associated with IL-8 and IL-1β expression.

Model 2

The relationship remained significant in Model 2 for child IL-8 (B = 0.05, SE = .01, 95% CI [0.02, 0.07], p < .001) and IL-1β (B = .03, SE = .02, 95% CI [0.0002, 0.06], p = .049) mRNA expression. The omnibus comparison remained significant (LR χ²(2) = 13.38, p = 0.001).

Model 3

Likewise, the relationship was significant in Model 3 for child IL-8 (B = 0.05, SE = .01, 95% CI [0.02, 0.07], p < .001) and IL-1β (B = .03, SE = .02, 95% CI [0.001, 0.06], p = .042) mRNA expression. The omnibus comparison also remained significant (LR χ²(2) = 13.19, p = 0.001).

Exploratory Analyses

Correlations between maternal and child inflammatory gene expression were small and nonsignificant (IL-8: ρ = .14, p = .39; IL-1β: ρ = .15, p = .33).

Discussion

The present study examined relationships between maternal experiences of discrimination in the past year and children’s molecular biomarkers of toxic stress during early childhood—a sensitive developmental period. Children of mothers who reported more frequent discrimination exhibited higher IL-8 and IL-1β mRNA expression, even after adjusting for maternal sociodemographic factors, depressive symptoms, and child BMI. Taken together, these findings suggest that maternal experiences of discrimination during a child’s preschool years may uniquely contribute to children’s developmental trajectories.

Our findings, while not directly predictive of future health outcomes, are best interpreted through a life course lens, consistent with the Linked Lives principle (Elder, 1998) and the Biological Embedding of Childhood Adversity model (Miller et al., 2011). These theories contextualize how early-life exposures to post-migration discrimination may shape long-term health. When mothers face repeated hardship or threat without adequate support, the shared emotional environment may calibrate their young children’s immune systems (National Scientific Council on the Developing Child, 2020). One plausible biological pathway is through the transcriptome of immune cells (Etzel et al., 2024; Marie-Mitchell & Cole, 2022). Over time, early immune programming may increase risk for inflammatory conditions in adulthood, including cardiovascular disease, asthma, and depression (Nusslock & Miller, 2016).

Unpredictable and socially threatening environments that frequently activate the stress response system may exert the strongest direct influence on the developing immune system (Kuhlman et al., 2017; Slavich, 2020). Indeed, qualitative maternal accounts from this sample revealed that experiences of discrimination often (re)produced shared environments of fear and instability (Alvarado-Harris et al., 2025). Discrimination, embedded within interconnected systems and person-place interactions, propagates and perpetuates contextual stress across multiple life domains, such as social relationships, employment, and housing (Harrell, 2000). These exposures may exert a broader influence on child outcomes than maternal depression or economic hardship alone (Harris et al., 2022). Consistent with this, cumulative social adversity was strongly associated with salivary IL-8 and IL-1β proteins in a large sample of children (N = 537, ages 0 to 17 years) (Pantell et al., 2024). Persistently high inflammation in childhood, in turn, has been linked to increased risk of mental and cardiometabolic disorders by early adulthood (Palmer et al., 2024).

Finally, our findings are also situated within broader epidemiological patterns among Latino populations, in which children of immigrants often enter adulthood with worse health than their parents (Fox et al., 2015). Consistent with this pattern, Latino individuals who grew up in the United States tend to show higher inflammatory levels by adulthood than those who migrated later in life, including during pregnancy (Alvarado-Harris et al., 2025; Scholaske et al., 2021). In turn, chronic inflammation underlies numerous early life health conditions that increase across successive post-migration generations, including low birth weight, infant mortality (Montoya-Williams et al., 2022), childhood asthma (Perreira & Allen, 2021) and early differences in brain development (Spann et al., 2024). Indeed, immigrant groups who experience the most discrimination may be the most likely to lose their initial advantage in maternal and child health (Andrasfay & Goldman, 2020; Bakhtiari, 2018; Dondero & Altman, 2024).

Limitations and Implications for Future Research

First, the cross-sectional design limits causal inference. Additionally, the modest sample size reduced power to detect small effects. There is also a risk of underreporting depressive symptoms due to social desirability bias, particularly given the stigma surrounding mental health in Latino communities (Misra et al., 2021). Although maternal gene-expression data were available only for a subset of dyads, exploratory correlations suggested that shared maternal–child inflammatory activity was unlikely to account for the observed associations. Furthermore, although our multi-method recruitment strategy captured much of the diversity within Latino immigrant communities, future studies should stratify by key sociodemographic characteristics (e.g., country of birth, immigration status) to allow for greater nuance. Finally, future work should also include the perspectives of fathers, who remain underrepresented in early childhood research.

A major strength of this study is its focus on discrimination experienced by immigrant mothers while raising young children. This sociocultural and developmental context has received little attention in psychobiological research (Anisman et al., 2024; Haft et al., 2021). Most existing work linking discrimination to inflammation has focused on adults, with far less on earlier, more malleable periods for immune development (Cardenas et al., 2025). Furthermore, early proinflammatory gene expression, often preceding protein-level differences, offers a sensitive window into children’s inflammatory biology. For instance, placental IL-8 mRNA expression has been associated with child behavioral outcomes years later (Zhou et al., 2022).

At the same time, longitudinal studies are needed to clarify developmental timing and potential causal pathways. During pregnancy, maternal exposure to discrimination may confer additional or distinct immune profiles in children through maternal biological stress pathways. (Vaknine Treidel et al., 2025; Veru et al., 2014). To this end, future longitudinal studies could integrate maternal biology and use larger samples to test moderation or mediation pathways linking maternal discrimination to child physiology. Finally, chronic health conditions in children could also be examined as downstream consequences of early stress biology.

Practice and Policy Implications

Home visiting programs for families with young children (0-5 years old), such as Nurse-Family Partnership, are evidence-based two-generation models that have improved maternal and child health in randomized controlled trials (Early Childhood Home Visiting Models: Reviewing Evidence of Effectiveness 2024). Some evidence suggests they may also improve child biomarkers sensitive to early psychosocial stress, including inflammation (Condon et al., 2021). These programs may be especially beneficial for immigrant families with young children, as they can help connect families to community support and access trauma-informed care (Katsiaficas, 2020). Importantly, relationship building inherent to home visiting programs may also allow women to feel heard and valued (Lewy, 2021). However, children in immigrant families are less likely to be enrolled in home visiting programs than children with US-born parents (Katsiaficas, 2020). To increase equity, the Migration Policy Institute recommends explicitly including immigrant and refugee families in needs assessments, partnering with trusted community organizations, and tailoring service models for cultural relevance (Katsiaficas, 2020).

On a broader socio-ecological level, militarized immigration enforcement and public rhetoric scapegoating immigrants can generate and exacerbate intergenerational trauma while increasing societal costs (Cerdeña et al., 2021; Dondero & Altman, 2024). Ultimately, cultivating welcoming environments for immigrants and their children not only mitigates risk but harnesses, rather than squanders, child potential that contributes to social capital and societal well-being.

Conclusion

Early life experiences that devalue and racialize immigrants and their children may be critical – yet understudied predictors – of health disparities that develop after migration. However, the vulnerable period following migration also represents a critical window of opportunity to positively support the long-term intergenerational trajectories of immigrant families. Future studies using stress biomarkers in young children of immigrants must value and center their unique experiences. In so doing, we can identify the most salient risk, protective, and promotive factors.

Footnotes

Acknowledgements

Thank you to all the remarkable mothers and their beautiful children who participated in this study. Thank you to Nicholle Johnson for conducting all the biological analyses.

ORCID iD

Rebeca Alvarado-Harris

Author Contributions

Alvarado-Harris, R contributed to conception and design contributed to acquisition, analysis, and interpretation drafted manuscript critically revised manuscript gave final approval agrees to be accountable for all aspects of work ensuring integrity and accuracy Perriera, K contributed to interpretation critically revised manuscript gave final approval agrees to be accountable for all aspects of work ensuring integrity and accuracy Santos, H contributed to conception contributed to acquisition critically revised manuscript gave final approval agrees to be accountable for all aspects of work ensuring integrity and accuracy.

Funding

The author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: Rebeca Alvarado-Harris was funded by NIH NINR under 1F31NR020843, NICHD/NIH NRSA T32 Postdoctoral Traineeship in the Biosocial Training Program 5T32HD091058-09, Caroline H. and Thomas S. Royster Fellowship, Barbara W. Madden Graduate Research Award, Alpha Chapter of Sigma Theta Tau International Research Grant, Linda Waring Matthews Research Award. Hudson P Santos Jr. was funded by Professorship start-up funds.

Declaration of Conflicting Interests

The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

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