Impact of colocated behavioral health on OB-GYN clinicians' rate of perinatal behavioral health diagnosis and psychotropic prescription.

OBJECTIVE: To examine the association of colocated behavioral health(BH) care with rates of OB-GYN clinician coding of BH diagnoses and BH medications. METHOD: Using 2 years of EMR data from perinatal individuals treated across 24 OB-GYN clinics, we tested the hypothesis that colocated BH care would increase rates of OB-GYN BH diagnoses and psychotropic prescription. RESULTS: Psychiatrist integration(0.1 FTE) was associated with 45.7% higher odds of OB-GYN coding for BH diagnoses and BH clinician integration was associated with 25% lower odds of OB-GYN BH diagnosis and 37.7% lower odds of BH medication prescription. Non-white patients had 28-74% and 43-76% lower odds of having a BH diagnosis and a BH medication ordered, respectively. The most common diagnoses were anxiety and depressive disorders(60%) and the most prescribed BH medications were SSRIs(86%). CONCLUSIONS: OB-GYN clinicians made fewer BH diagnoses and prescribed fewer psychotropics after 2.0 FTE BH clinician integration, a possible indication of external referrals for BH treatment. Non-white patients received BH diagnoses and medications less often than white patients. Future research in real world implementation of BH integration in OB-GYN clinics should examine fiscal strategies that support BH care manager-OB-GYN collaboration as well as methods to ensure equitable delivery of BH care.

Preconception interpersonal personality features predict postpartum maternal parenting behaviors.

Individual differences in personality traits affect the quality of social relationships. The parent-child relationship is among the most impactful social relationships in an individual's life, and positive parenting behaviors are known to support positive child development. The present study aimed to identify personality predictors-measured prior to conception at age 16-on later positive parenting behaviors. Young women (n = 207; 83.5% Black or multiracial; 86.9% receiving public assistance) who were followed since childhood as part of a prospective longitudinal study were observed interacting with their infants 4 months postpartum. We tested prospective associations between personality factors relevant to the quality and maintenance of social relationships-empathy, callousness, and rejection sensitivity-and coded dimensions of parenting behavior: maternal warmth, responsiveness, and mental state talk. We additionally examined potential moderating effects of infant affect on the relations between personality and parenting behavior. Results indicated that preconception empathy predicted later maternal warmth and responsivity, whereas preconception callousness was inversely associated with maternal warmth. The association between rejection sensitivity and maternal mental state talk was moderated by infant affect, consistent with a "goodness-of-fit" framework. The present study is the first to our knowledge to report associations between preconception personality and later parenting behaviors. The findings suggest that a woman's personality traits in adolescence, potentially years before she becomes a mother, can predict her behavior during interactions with her infant. Clinically, findings suggest the potential for interventions in adolescence to influence later parenting behavior and ultimately impact children's developmental outcomes. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

An intensive outpatient program for suicidal college students.

Objective: College counseling centers (CCCs) have limited capacity to accommodate high-risk students who need more intensive care than traditional outpatient treatment. We describe an Intensive Outpatient Program (IOP) to meet the specialized needs of suicidal undergraduates. Participants: Suicidal undergraduates aged 18-24. Methods: Fact-gathering meetings with local universities confirmed high need for prompt access to IOP care for students presenting in crisis at CCCs and emergency rooms, and post-inpatient discharge. We thus iteratively designed and implemented the College Option Services for Teens at Risk (COSTAR) IOP. Results: The 6-week program includes initial diagnostic evaluation and risk assessment followed by weekly skills groups, individual therapy, and medication management. Between September 2017 and January 2020, 148 students (M age = 19.7) attended an average of 5.7 COSTAR group sessions (SD = 4.7). Conclusions: A specialty IOP for suicidal college students holds promise in a stepped care approach for at-risk college students.

Reduced postpartum hippocampal volume is associated with positive mother-infant caregiving behavior.

BACKGROUND: Maternal caregiving is a complex set of behaviors that can be impacted by early life stress (ELS), yet human neurobiological mechanisms are not well understood. METHODS: Young mothers (n=137) were enrolled into a neuroimaging substudy of the longitudinal Pittsburgh Girls Study (PGS). Using data collected annually while subjects were ages 8-16, ELS was calculated as a composite score of poverty, trauma, and difficult life circumstances. At 4 months postpartum, mothers underwent neuroimaging and filmed mother-infant interaction. Maternal caregiving was coded along 6 dimensions yielding "positive" and "negative" components of caregiving. Participants' MPRAGE images were subjected to preprocessing and voxel-based morphometry (VBM) to quantify vmPFC, amygdala and hippocampus gray matter (GM) volume. We used hierarchical linear regression to investigate the relationship between GM volume and maternal caregiving, covarying for ELS as well as maternal age, weeks postpartum, race and postpartum depression score. RESULTS: Hippocampal GM volume was inversely associated with independent observations of positive maternal caregiving. Similar findings in the vmPFC did not remain significant after correction for multiple comparisons. ELS, particularly physical assault, was associated with reduced GM volumes but was unrelated to observed maternal caregiving. LIMITATIONS: Our single-timepoint MRI-based GM volume method was not able to demonstrate time-related intra-individual perinatal neuroplasticity, nor could it resolve neural subregions involved in caregiving-related plasticity. CONCLUSIONS: Our findings shed light on the putative plasticity of the human maternal extra-hypothalamic stress-circuitry underlying positive maternal caregiving behavior. Whether reduced hippocampal GM volume represents pruning or represents neural resilience in the face of ELS, remains to be studied.

Implementation of perinatal collaborative care: a health services approach to perinatal depression care.

AIM: Our objective was to integrate lessons learned from perinatal collaborative care programs across the United States, recognizing the diversity of practice settings and patient populations, to provide guidance on successful implementation. BACKGROUND: Collaborative care is a health services delivery system that integrates behavioral health care into primary care. While efficacious, effectiveness requires rigorous attention to implementation to ensure adherence to the core evidence base. METHODS: Implementation strategies are divided into three pragmatic stages: preparation, program launch, and program growth and sustainment; however, these steps are non-linear and dynamic. FINDINGS: The discussion that follows is not meant to be prescriptive; rather, all implementation tasks should be thoughtfully tailored to the unique needs and setting of the obstetric community and patient population. In particular, we are aware that implementation on the level described here assumes commitment of both effort and money on the part of clinicians, administrators, and the health system, and that such financial resources are not always available. We conclude with synthesis of a survey of existing collaborative care programs to identify implementation practices of existing programs.

Postpartum depressive symptoms moderate the link between mothers' neural response to positive faces in reward and social regions and observed caregiving.

Postpartum depression may disrupt socio-affective neural circuitry and compromise provision of positive parenting. Although work has evaluated how parental response to negative stimuli is related to caregiving, research is needed to examine how depressive symptoms during the postpartum period may be related to neural response to positive stimuli, especially positive faces, given depression's association with biased processing of positive faces. The current study examined the association between neural response to adult happy faces and observations of maternal caregiving and the moderating role of postpartum depression, in a sample of 18- to 22-year old mothers (n = 70) assessed at 17 weeks (s.d. = 4.7 weeks) postpartum. Positive caregiving was associated with greater precuneus and occipital response to positive faces among mothers with lower depressive symptoms, but not for those with higher symptoms. For mothers with higher depressive symptoms, greater ventral and dorsal striatal response to positive faces was associated with more positive caregiving, whereas the opposite pattern emerged for mothers with lower symptoms. There was no association between negative caregiving and neural response to positive faces or negative faces. Processing of positive stimuli may be an important prognostic target in mothers with depressive symptoms, given its link with healthy caregiving behaviors.

Telephone-Based Depression Care Management for Postpartum Women: A Randomized Controlled Trial.

OBJECTIVE: With a period prevalence of 21.9% in the year after birth, depression is a common complication of childbearing. We assessed the impact of telephone-delivered depression care management (DCM) on symptom levels, health service utilization, and functional status 3, 6, and 12 months postpartum. METHODS: The randomized controlled trial was conducted at the University of Pittsburgh, Pittsburgh, Pennsylvania, from March 2006 through September 2010. Women (N = 628) who screened positive for depression (a score of 10 or greater on the Edinburgh Postnatal Depression Scale) 4 to 6 weeks postpartum were evaluated with the Structured Clinical Interview for DSM-IV-TR Axis I Disorders, Research Version, Patient Edition With Psychotic Screen and enrolled in a randomized trial of DCM compared to enhanced usual care (EUC). Clinicians conducted telephone contacts to educate, assist with treatment decisions, monitor symptoms, facilitate access to services, and encourage links to community resources. Independent evaluators collected symptom scores, functional status, and health services use at 3, 6, and 12 months postpartum. Primary outcome was reduction of symptoms as measured by the Structured Interview Guide for the Hamilton Depression Rating Scale with Atypical Depression Supplement. RESULTS: Mean depressive symptom and function scores significantly improved (by greater than 50%) in both groups of women but did not differ by DCM versus EUC assignment. Health services use was similar in women randomly assigned to DCM compared to EUC. Women with childhood sexual abuse responded significantly more favorably to DCM on depression and functional measures (all P values < .02). CONCLUSIONS: Both DCM and EUC favorably impacted depression symptom levels and function. The subgroup of women with childhood sexual abuse benefited significantly more from DCM compared to the EUC condition. Regular telephone availability of a clinician is a resource that appears to be particularly therapeutic to women with childhood sexual abuse. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT00282776.

Mood symptoms in pregnant and postpartum women with bipolar disorder: a naturalistic study.

OBJECTIVE: We conducted a prospective naturalistic study of pregnant women with bipolar disorder (BD) to evaluate symptoms of BD across childbearing and assess whether pharmacotherapy reduced their severity. METHODS: Assessments were scheduled at 20, 30, and 36 weeks' gestation and 2, 12, 26, and 52 weeks postpartum. Symptoms were assessed using the Structured Interview Guide for the Hamilton Depression Rating Scale-Atypical Depression Supplement (SIGH-ADS) and Mania Rating Scale (MRS). RESULTS: Pregnant women (N=152) with BD were evaluated; 88 women (58%) were treated and 64 untreated (42%) with psychotropic drugs during pregnancy. Among the 88 women treated, 23 (26%) discontinued their medication in the first trimester and the remaining 65 (74%) were exposed throughout pregnancy or in the second and third trimesters. More than two-thirds (73%) of the women who remained in the study took psychotropic agents postpartum. The mean scores on the SIGH-ADS were in the mild range of depressive symptoms in both the psychotropic-treated and untreated groups in both pregnancy and postpartum. The majority of women had no or few symptoms of mania. Of the pregnant women treated with psychotropic agents, 66% received a guideline-concordant drug, and 34% received either antidepressant monotherapy (for BD I) or mono- or polypharmacy with a variety of other agents. CONCLUSIONS: This sample of perinatal women with BD was characterized by mild residual symptoms of depression independent of pharmacotherapy, which poses a risk for recurrence and impaired parenting. The treatment of childbearing women with BD deserves urgent clinical and research attention to improve psychiatric outcomes.

Predicting adolescent postpartum caregiving from trajectories of depression and anxiety prior to childbirth: a 5-year prospective study.

Symptoms of depression and anxiety in pregnancy have been linked to later impaired caregiving. However, mood symptoms are often elevated in pregnancy and may reflect motherhood-specific concerns. In contrast, little is known about the effects of prepregnancy depression and anxiety on postpartum caregiving. Understanding these developmental risk factors is especially important when childbearing also occurs during adolescence. The sample comprised 188 adolescent mothers (ages 12-19 years) who had participated in a longitudinal study since childhood. Mothers were observed in face-to-face interaction with the infant at 4 months postpartum, and caregiving behaviors (sensitivity, hostile-intrusive behavior, and mental state talk) were coded independently. Data on self-reported depression and anxiety gathered in the 5 years prior to childbirth were drawn from the large-scale longitudinal study. Parallel process latent growth curve models revealed unique effects of distal anxiety and slow decline in anxiety over time on lower levels of maternal mental state talk after accounting for the overlap with depression development. Depressive symptoms showed significant stability from distal measurement to the postpartum period, but only concurrent postpartum mood was associated with poorer quality of maternal speech. The results highlight specific targets for well-timed preventive interventions with vulnerable dyads.

The influence of motherhood on neural systems for reward processing in low income, minority, young women.

OBJECTIVE: Given the association between maternal caregiving behavior and heightened neural reward activity in experimental animal studies, the present study examined whether motherhood in humans positively modulates reward-processing neural circuits, even among mothers exposed to various life stressors and depression. METHODS: Subjects were 77 first-time mothers and 126 nulliparous young women from the Pittsburgh Girls Study, a longitudinal study beginning in childhood. Subjects underwent a monetary reward task during functional magnetic resonance imaging in addition to assessment of current depressive symptoms. Life stress was measured by averaging data collected between ages 8-15 years. Using a region-of-interest approach, we conducted hierarchical regression to examine the relationship of psychosocial factors (life stress and current depression) and motherhood with extracted ventral striatal (VST) response to reward anticipation. Whole-brain regression analyses were performed post-hoc to explore non-striatal regions associated with reward anticipation in mothers vs nulliparous women. RESULTS: Anticipation of monetary reward was associated with increased neural activity in expected regions including caudate, orbitofrontal, occipital, superior and middle frontal cortices. There was no main effect of motherhood nor motherhood-by-psychosocial factor interaction effect on VST response during reward anticipation. Depressive symptoms were associated with increased VST activity across the entire sample. In exploratory whole brain analysis, motherhood was associated with increased somatosensory cortex activity to reward (FWE cluster forming threshold p<0.001). CONCLUSIONS: These findings indicate that motherhood is not associated with reward anticipation-related VST activity nor does motherhood modulate the impact of depression or life stress on VST activity. Future studies are needed to evaluate whether earlier postpartum assessment of reward function, inclusion of mothers with more severe depressive symptoms, and use of reward tasks specific for social reward might reveal an impact of motherhood on reward system activity.

Right Frontoinsular Cortex and Subcortical Activity to Infant Cry Is Associated with Maternal Mental State Talk.

The study objective was to examine neural correlates of a specific component of human caregiving: maternal mental state talk, reflecting a mother's proclivity to attribute mental states and intentionality to her infant. Using a potent, ecologically relevant stimulus of infant cry during fMRI, we tested hypotheses that postpartum neural response to the cry of "own" versus a standard "other" infant in the right frontoinsular cortex (RFIC) and subcortical limbic network would be associated with independent observations of maternal mental state talk. The sample comprised 76 urban-living, low socioeconomic mothers (82% African American) and their 4-month-old infants. Before the fMRI scan, mothers were filmed in face-to-face interaction with their infant, and maternal behaviors were coded by trained researchers unaware of all other information about the participants. The results showed higher functional activity in the RFIC to own versus other infant cry at the group level. In addition, RFIC and bilateral subcortical neural activity (e.g., thalamus, amygdala, hippocampus, putamen) was associated positively with maternal mental state talk but not with more global aspects of observed caregiving. These findings held when accounting for perceptual and contextual covariates, such as maternal felt distress, urge to help, depression severity, and recognition of own infant cry. Our results highlight the need to focus on specific components of caregiving to advance understanding of the maternal brain. Future work will examine the predictive utility of this neural marker for mother-child function. SIGNIFICANCE STATEMENT: The current study advances extant literature examining the neural underpinning of early parenting behavior. The findings highlight the special functional importance of the right frontoinsular cortex-thalamic-limbic network in a mother's proclivity to engage in mental state talk with her preverbal infant, a circumscribed aspect of maternal caregiving purported to be a prerequisite of sensitive and responsive caregiving. These associations existed specifically for maternal mentalizing behavior and were not evident for more generic aspects of caregiving in this urban sample of 76 postpartum mothers. Finally, the findings were robust even when controlling for potential demographic, perceptual, and contextual confounds, supporting the notion that these regions constitute an innate, specialized maternal mentalizing network.

Transdermal Estradiol Treatment for Postpartum Depression: A Pilot, Randomized Trial.

Postpartum depression occurs in 14.5% of women in the first 3 months after birth. This study was an 8-week acute phase randomized trial with 3 cells (transdermal estradiol [E2], sertraline [SERT], and placebo [PL]) for the treatment of postpartum major depressive disorder. However, the study was stopped after batch analysis revealed that the E2 serum concentrations were lower than prestudy projections. This paper explores our experiences that will inform future investigations of therapeutic E2 use. Explanations for the low E2 concentrations were as follows: (1) study patch nonadhesion, which did not explain the low concentrations across the entire sample. (2) Ineffective transdermal patch preparations, although 2 different patch preparations were used and no significant main effect of patch type on E2 concentrations was found. (3) Obesity, at study entry, E2-treated women had body mass index of 32.9 (7.4) (mean [SD]). No pharmacokinetic data comparing E2 concentrations from transdermal patches in obese women versus normal weight controls are available. (4) Induction of cytochrome P450 (CYP450) 3A4 and other E2 elimination pathways in pregnancy. CYP4503A4 is induced in pregnancy and is a pathway for the metabolism of E2. Conversion to estrone and phase II metabolism via glucuronidation and sulfation, which also increase in pregnancy, are routes of E2 elimination. The time required for these pathways to normalize after delivery has not been elucidated. The observation that transdermal E2 doses greater than 100 µg/d did not increase serum concentrations was unexpected. Another hypothesis consistent with this observation is suppression of endogenous E2 secretion with increasing exogenous E2 dosing.

Disrupted posterior cingulate-amygdala connectivity in postpartum depressed women as measured with resting BOLD fMRI.

Disengagement of emotion regulation circuits was previously shown in depressed mothers and was hypothesized to underlie the impaired maternal-infant sensitivity described in postpartum depression (PPD). We hypothesized similarly reduced resting-state functional connectivity in default mode network (DMN) regions involved in social cognition in PPD. Resting-state functional MRI, clinical and mother-infant attachment data were obtained from 14 unmedicated postpartum women with major depression and 23 healthy postpartum women. Posterior cingulate cortex (PCC) time series were extracted, filtered between 0.007 and 0.08 Hz and used as regressors in a whole brain general linear model analysis. PCC-right amygdala connectivity was significantly disrupted in depressed compared to healthy mothers for low-frequency neural activity, showing a negative (inverse) coupling in the depressed group but not in the controls. PCC-right amygdala connectivity was positively correlated with PCC-parahippocampus connectivity. Resting connectivity patterns of positive co-activations in postpartum women mirrored the canonical DMN. These findings of reduced PCC-amygdala coupling raise the possibility that PPD might involve the disruption of outward, preventative aspects of self-relevant thought and theory of mind/empathy processes. Further integrated studies of neural connectivity and these cognitive/behavioral dimensions are warranted.

Onset timing, thoughts of self-harm, and diagnoses in postpartum women with screen-positive depression findings.

IMPORTANCE: The period prevalence of depression among women is 21.9% during the first postpartum year; however, questions remain about the value of screening for depression. OBJECTIVES: To screen for depression in postpartum women and evaluate positive screen findings to determine the timing of episode onset, rate and intensity of self-harm ideation, and primary and secondary DSM-IV disorders to inform treatment and policy decisions. DESIGN: Sequential case series of women who recently gave birth. SETTING: Urban academic women's hospital. PARTICIPANTS: During the maternity hospitalization, women were offered screening at 4 to 6 weeks post partum by telephone. Screen-positive women were invited to undergo psychiatric evaluations in their homes. MAIN OUTCOMES AND MEASURES: A positive screen finding was an Edinburgh Postnatal Depression Scale (EPDS) score of 10 or higher. Self-harm ideation was assessed on EPDS item 10: "The thought of harming myself has occurred to me" (yes, quite often; sometimes; hardly ever; never). Screen-positive women underwent evaluation with the Structured Clinical Interview for DSM-IV for Axis I primary and secondary diagnoses. RESULTS: Ten thousand mothers underwent screening, with positive findings in 1396 (14.0%); of these, 826 (59.2%) completed the home visits and 147 (10.5%) completed a telephone diagnostic interview. Screen-positive women were more likely to be younger, African American, publicly insured, single, and less well educated. More episodes began post partum (40.1%), followed by during pregnancy (33.4%) and before pregnancy (26.5%). In this population, 19.3% had self-harm ideation. All mothers with the highest intensity of self-harm ideation were identified with the EPDS score of 10 or higher. The most common primary diagnoses were unipolar depressive disorders (68.5%), and almost two-thirds had comorbid anxiety disorders. A striking 22.6% had bipolar disorders. CONCLUSIONS AND RELEVANCE: The most common diagnosis in screen-positive women was major depressive disorder with comorbid generalized anxiety disorder. Strategies to differentiate women with bipolar from unipolar disorders are needed. TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT00282776.

Postpartum and depression status are associated with lower [[¹¹C]raclopride BP(ND) in reproductive-age women.

The early postpartum period is associated with increased risk for affective and psychotic disorders. Because maternal dopaminergic reward system function is altered with perinatal status, dopaminergic system dysregulation may be an important mechanism of postpartum psychiatric disorders. Subjects included were non-postpartum healthy (n=13), postpartum healthy (n=13), non-postpartum unipolar depressed (n=10), non-postpartum bipolar depressed (n=7), postpartum unipolar (n=13), and postpartum bipolar depressed (n=7) women. Subjects underwent 60 min of [¹¹C]raclopride-positron emission tomography imaging to determine the nondisplaceable striatal D2/3 receptor binding potential (BP(ND)). Postpartum status and unipolar depression were associated with lower striatal D2/3 receptor BP(ND) in the whole striatum (p=0.05 and p=0.02, respectively) that reached a maximum of 7-8% in anteroventral striatum for postpartum status (p=0.02). Unipolar depression showed a nonsignificant trend toward being associated with 5% lower BP(ND) in dorsal striatum (p=0.06). D2/3 receptor BP(ND) did not differ significantly between unipolar depressed and healthy postpartum women or between bipolar and healthy subjects; however, D2/3 receptor BP(ND) was higher in dorsal striatal regions in bipolar relative to unipolar depressives (p=0.02). In conclusion, lower striatal D2/3 receptor BP(ND) in postpartum and unipolar depressed women, primarily in ventral striatum, and higher dorsal striatal D2/3 receptor BP(ND) in bipolar relative to unipolar depressives reveal a potential role for the dopamine (DA) system in the physiology of these states. Further studies delineating the mechanisms underlying these differences in D2/3 receptor BP(ND), including study of DA system responsivity to rewarding stimuli, and increasing power to assess unipolar vs bipolar-related differences, are needed to better understand the affective role of the DA system in postpartum and depressed women.

Age, sex, and reproductive hormone effects on brain serotonin-1A and serotonin-2A receptor binding in a healthy population.

There is a need for rigorous positron emission tomography (PET) and endocrine methods to address inconsistencies in the literature regarding age, sex, and reproductive hormone effects on central serotonin (5HT) 1A and 2A receptor binding potential (BP). Healthy subjects (n=71), aged 20-80 years, underwent 5HT1A and 2A receptor imaging using consecutive 90-min PET acquisitions with [(11)C]WAY100635 and [(18)F]altanserin. Logan graphical analysis was used to derive BP using atrophy-corrected distribution volume (V(T)) in prefrontal, mesiotemporal, occipital cortices, and raphe nucleus (5HT1A only). We used multivariate linear regression modeling to examine BP relationships with age, age(2), sex, and hormone concentrations, with post hoc regional significance set at p<0.008. There were small postsynaptic 5HT1A receptor BP increases with age and estradiol concentration in women (p=0.004-0.005) and a tendency for small 5HT1A receptor BP declines with age and free androgen index in men (p=0.05-0.06). Raphe 5HT1A receptor BP decreased 4.5% per decade of age (p=0.05), primarily in men. There was a trend for 15% receptor reductions in prefrontal cortical regions in women relative to men (post hoc p=0.03-0.10). The significant decline in 5HT2A receptor BP relative to age (8% per decade; p<0.001) was not related to sex or hormone concentrations. In conclusion, endocrine standardization minimized confounding introduced by endogenous hormonal fluctuations and reproductive stage and permitted us to detect small effects of sex, age, and endogenous sex steroid exposures upon 5HT1A binding. Reduced prefrontal cortical 5HT1A receptor BP in women vs men, but increased 5HT1A receptor BP with aging in women, may partially explain the increased susceptibility to affective disorders in women during their reproductive years that is mitigated in later life. 5HT1A receptor decreases with age in men might contribute to the known increased risk for suicide in men over age 75 years. Low hormone concentrations in adults <50 years of age may be associated with more extreme 5HT1A receptor BP values, but remains to be studied further. The 5HT2A receptor declines with age were not related to sex or hormone concentrations in this sample. Additional study in clinical populations is needed to further examine the affective role of sex-hormone-serotonin receptor relationships.

Rapid habituation of ventral striatal response to reward receipt in postpartum depression.

BACKGROUND: Little is known about neural mechanisms of postpartum depression (PPD). Previous research notes ventral striatal activity and dopamine release increases with maternal attachment but decreases in major depressive disorder. This study tests the hypothesis that striatal response to reward is altered in PPD. METHODS: Subjects underwent functional magnetic resonance imaging blood oxygenation level-dependent acquisition during a fast event-related card-guessing, monetary reward task. Time series data from an independent sample of 10 healthy mothers were used to establish the ventral striatal region of interest (ROI). Repeated-measures analysis of variance of time series data in the established ROI was then conducted for a discrete group of healthy (n = 12) and depressed, unmedicated mothers (n = 12). RESULTS: Data from the independent sample of 10 healthy mothers established an ROI in the left ventral striatum (-13, 12, -4, 477 mm(3)), with cluster significance p < .01, corrected. There was a significant quadratic interaction of time × group [F(1,22) = 5.22, p = .032] in this ROI in the healthy (n = 12) and depressed mothers (n = 12). This effect represents a nonlinear attenuation of ventral striatal response with time that was greater in depressed than healthy mothers. CONCLUSIONS: Rapid attenuation of ventral striatal response to reward receipt in postpartum depression might represent an important neural mechanism of postpartum depression. Additional study with infant stimuli and in relationship to mother-infant behavior is needed.

Medial prefrontal cortex serotonin 1A and 2A receptor binding interacts to predict threat-related amygdala reactivity.

BACKGROUND: The amygdala and medial prefrontal cortex (mPFC) comprise a key corticolimbic circuit that helps shape individual differences in sensitivity to threat and the related risk for psychopathology. Although serotonin (5-HT) is known to be a key modulator of this circuit, the specific receptors mediating this modulation are unclear. The colocalization of 5-HT1A and 5-HT2A receptors on mPFC glutamatergic neurons suggests that their functional interactions may mediate 5-HT effects on this circuit through top-down regulation of amygdala reactivity. Using a multimodal neuroimaging strategy in 39 healthy volunteers, we determined whether threat-related amygdala reactivity, assessed with blood oxygen level-dependent functional magnetic resonance imaging, was significantly predicted by the interaction between mPFC 5-HT1A and 5-HT2A receptor levels, assessed by positron emission tomography. RESULTS: 5-HT1A binding in the mPFC significantly moderated an inverse correlation between mPFC 5-HT2A binding and threat-related amygdala reactivity. Specifically, mPFC 5-HT2A binding was significantly inversely correlated with amygdala reactivity only when mPFC 5-HT1A binding was relatively low. CONCLUSIONS: Our findings provide evidence that 5-HT1A and 5-HT2A receptors interact to shape serotonergic modulation of a functional circuit between the amygdala and mPFC. The effect of the interaction between mPFC 5-HT1A and 5-HT2A binding and amygdala reactivity is consistent with the colocalization of these receptors on glutamatergic neurons in the mPFC.