The Effects of Maternal Mirroring on the Development of Infant Social Expressiveness: The Case of Infant Cleft Lip

Parent-infant social interactions start early in development, with infants showing active communicative expressions by just two months. A key question is how this social capacity develops. Maternal mirroring of infant expressions is considered an important, intuitive, parenting response, but evidence is sparse in the first two months concerning the conditions under which mirroring occurs and its developmental sequelae, including in clinical samples where the infant's social expressiveness may be affected. We investigated these questions by comparing the development of mother-infant interactions between a sample where the infant had cleft lip and a normal, unaffected, comparison sample. We videotaped dyads in their homes five times from one to ten weeks and used a microanalytic coding scheme for maternal and infant behaviours, including infant social expressions, and maternal mirroring and marking responses. We also recorded maternal gaze to the infant, using eye-tracking glasses. Although infants with cleft lip did show communicative behaviours, the rate of their development was slower than in comparison infants. This group difference was mediated by a lower rate of mirroring of infant expressions by mothers of infants with cleft lip; this effect was, in turn, partly accounted for by reduced gaze to the infant's mouth, although the clarity of infant social expressions (indexed by cleft severity) and maternal self-blame regarding the cleft were also influential. Results indicate the robustness of parent-infant interactions but also their sensitivity to specific variations in interactants' appearance and behaviour. Parental mirroring appears critical in infant social development, likely supported by the mirror neuron system and underlying clinical and, possibly, cultural differences in infant behaviour. These findings suggest new avenues for clinical intervention.

HISTORY OF CHILDHOOD ABUSE AND MOTHER-INFANT INTERACTION: A SYSTEMATIC REVIEW OF OBSERVATIONAL STUDIES

Literature that has examined maternal self-reported history of abuse and an observational assessment of infant-mother interaction were reviewed. Electronic databases were searched, and studies that met predefined criteria were included. Fourteen (12 independent samples) studies were included and assessed for quality using the Effective Public Health Practice Project tool (National Collaborating Centre for Methods and Tools, 2008). Ten of the 14 studies found a direct or an indirect relationship between self-reported abuse and observed caregiving. The small number of studies and variation in sample characteristics and measurement limit conclusions. Of the studies that were rated of the highest quality, there is some consistency showing that the effect of maternal abuse history on caregiving may be via a third variable (i.e., stress reactivity or depressive symptoms). The current review discusses strengths and limitations of the existing literature and offers suggestions for future research.

Affect recognition and the quality of mother-infant interaction: understanding parenting difficulties in mothers with schizophrenia

This study investigated the quality of mother-infant interaction and maternal ability to recognise adult affect in three study groups consisting of mothers with a diagnosis of schizophrenia, mothers with depression and healthy controls. Sixty-four mothers were recruited from a Mother and Baby Unit and local children's centres. A 5-min mother-infant interaction was coded on a number of caregiving variables. Affect recognition and discrimination abilities were tested via a series of computerised tasks. Group differences were found both in measures of affect recognition and in the mother-infant interaction. Mothers with schizophrenia showed consistent impairments across most of the parenting measures and all measures of affect recognition and discrimination. Mothers with depression fell between the mothers with schizophrenia and healthy controls on most measures. However, depressed women's parenting was not significantly poorer than controls on any of the measures, and only showed trends for differences with mothers with schizophrenia on a few measures. Regression analyses found impairments in affect recognition and a diagnosis of schizophrenia to predict the occurrence of odd or unusual speech in the mother-infant interaction. Results add to the growing body of knowledge on the mother-infant interaction in mothers with schizophrenia and mothers with depression compared to healthy controls, suggesting a need for parenting interventions aimed at mothers with these conditions. While affect recognition impairments were not found to fully explain differences in parenting among women with schizophrenia, further research is needed to understand the psychopathology of parenting disturbances within this clinical group.

A molecular model for neurodevelopmental disorders

Genes implicated in neurodevelopmental disorders (NDDs) important in cognition and behavior may have convergent function and several cellular pathways have been implicated, including protein translational control, chromatin modification, and synapse assembly and maintenance. Here, we test the convergent effects of methyl-CpG binding domain 5 (MBD5) and special AT-rich binding protein 2 (SATB2) reduced dosage in human neural stem cells (NSCs), two genes implicated in 2q23.1 and 2q33.1 deletion syndromes, respectively, to develop a generalized model for NDDs. We used short hairpin RNA stably incorporated into healthy neural stem cells to supress MBD5 and SATB2 expression, and massively parallel RNA sequencing, DNA methylation sequencing and microRNA arrays to test the hypothesis that a primary etiology of NDDs is the disruption of the balance of NSC proliferation and differentiation. We show that reduced dosage of either gene leads to significant overlap of gene-expression patterns, microRNA patterns and DNA methylation states with control NSCs in a differentiating state, suggesting that a unifying feature of 2q23.1 and 2q33.1 deletion syndrome may be a lack of regulation between proliferation and differentiation in NSCs, as we observed previously for TCF4 and EHMT1 suppression following a similar experimental paradigm. We propose a model of NDDs whereby the balance of NSC proliferation and differentiation is affected, but where the molecules that drive this effect are largely specific to disease-causing genetic variation. NDDs are diverse, complex and unique, but the optimal balance of factors that determine when and where neural stem cells differentiate may be a major feature underlying the diverse phenotypic spectrum of NDDs.

Trauma and traumatic loss in pregnant adolescents: the impact of Trauma-Focused Cognitive Behavior Therapy on maternal unresolved states of mind and Posttraumatic Stress Disorder

Pregnant adolescents are a group at high risk for exposure to traumatic experiences. The present study aimed to examine if Trauma-Focused Cognitive Behavior Therapy (TF-CBT) typically applied to Posttraumatic Stress Disorder (PTSD), could also be applied to unresolved states of mind in a sample of socially at-risk pregnant adolescents. Forty-three adolescents who were in their second trimester of pregnancy and who also had positive indices of unresolved states of mind or symptoms of PTSD were randomly assigned to either the treatment as usual (parenting classes) or intervention (parenting classes + TF-CBT) group. Adolescent mother-infant dyads were then re-assessed at infant ages 6 and 12 months on a broad range of measures, including those specific to attachment, as well as to PTSD, and adolescent behavioral adjustment. Twenty-six of the 43 (60%) recruited subjects completed all components of the study protocol. Although there were no significant effects of the TF-CBT intervention on maternal attachment, infant attachment, PTSD diagnosis and adolescent behavioral adjustment, several study limitations restrict our ability to draw firm conclusions about the efficacy of TF-CBT for use in pregnant adolescents with complex trauma. The discussion offers insight and guidance for clinical work and future intervention research efforts with this vulnerable population.

Course of depression and anxiety symptoms during the transition to parenthood for female adolescents with histories of victimization

The aim of the current study was to increase understanding of how victimization history impacts the longitudinal course of depression and anxiety in a sample of 55 adolescents emerging into parenthood. Adolescents were interviewed about their victimization experiences during their second trimester of pregnancy, and interviews were subsequently classified according the Maltreatment Classification Scale (Barnett, Manly, & Cicchetti, 1993). Adolescents reported on their symptoms of depression and anxiety prenatally and 6 and 12 months postpartum. Growth curve modeling revealed that, on average, there was a steady linear decline in depression and anxiety symptoms across the transition to parenthood, with a rate of change of 25% and 20%, respectively, from the prenatal assessment to 12 months postpartum. Sexual abuse history attenuated the likelihood of a decrease in depressive symptoms over time. Neglect history was associated with higher prenatal levels of anxiety, as well as a steeper decline in anxiety symptoms over time. Future research is needed to determine the role of poly-victimization in predicting the onset and change of depression and anxiety symptoms. Findings from the current study have the potential to aid in the design of preventative and intervention efforts to reduce risks of mental health difficulties in adolescent parents.

The reporting of maltreatment experiences during the Adult Attachment Interview in a sample of pregnant adolescents

This present student examines maltreatment experiences reported by 55 high-risk pregnant adolescents in response to a slightly adapted version of the Adult Attachment Interview (AAI; George, Kaplan, & Main, 1996 ). Previous research has suggested that the rates of unresolved states of mind regarding trauma in response to the AAI may be underestimated due to the lack of direct questions and associated probes regarding physical, sexual, and emotional abuse. We address this concern by including behaviorally phrased questions and probes regarding maltreatment experiences into the original format of the AAI and examine the concordance between reports of maltreatment experiences in response to the AAI and the Childhood Trauma Questionnaire (CTQ). Maltreatment experiences in response to the AAI were evaluated using the Maltreatment Classification Scale developed by Barnett, Manly, and Cicchetti (1993). We also examine the association between unresolved states of mind and dissociation using the Adolescent Dissociative Experience Scale. Results revealed a significant concordance between reports of maltreatment in response to the AAI and CTQ measures. Reports of maltreatment were prevalent in this sample: across the AAI and CTQ measures, 96% of pregnant adolescents reported some form of emotional abuse, 84% physical abuse, 59% sexual abuse, and 88% reported neglect. Sexual abuse history uniquely predicted unresolved status in response to the AAI. Self-reports of dissociation were significantly associated with unresolved states of mind. Results suggest that the inclusion of behaviorally focused questions and probes regarding maltreatment in the AAI protocol can further contribute to the clinical and theoretical value of this tool.

Phenotypic consequences resulting from a methionine-to-valine substitution at position 48 in the HPr protein of Streptococcus salivarius

In gram-positive bacteria, the HPr protein of the phosphoenolpyruvate:sugar phosphotransferase system (PTS) can be phosphorylated on a histidine residue at position 15 (His(15)) by enzyme I (EI) of the PTS and on a serine residue at position 46 (Ser(46)) by an ATP-dependent protein kinase (His approximately P and Ser-P, respectively). We have isolated from Streptococcus salivarius ATCC 25975, by independent selection from separate cultures, two spontaneous mutants (Ga3.78 and Ga3.14) that possess a missense mutation in ptsH (the gene encoding HPr) replacing the methionine at position 48 by a valine. The mutation did not prevent the phosphorylation of HPr at His(15) by EI nor the phosphorylation at Ser(46) by the ATP-dependent HPr kinase. The levels of HPr(Ser-P) in glucose-grown cells of the parental and mutant Ga3.78 were virtually the same. However, mutant cells growing on glucose produced two- to threefold less HPr(Ser-P)(His approximately P) than the wild-type strain, while the levels of free HPr and HPr(His approximately P) were increased 18- and 3-fold, respectively. The mutants grew as well as the wild-type strain on PTS sugars (glucose, fructose, and mannose) and on the non-PTS sugars lactose and melibiose. However, the growth rate of both mutants on galactose, also a non-PTS sugar, decreased rapidly with time. The M48V substitution had only a minor effect on the repression of alpha-galactosidase, beta-galactosidase, and galactokinase by glucose, but this mutation abolished diauxie by rendering cells unable to prevent the catabolism of a non-PTS sugar (lactose, galactose, and melibiose) when glucose was available. The results suggested that the capacity of the wild-type cells to preferentially metabolize glucose over non-PTS sugars resulted mainly from inhibition of the catabolism of these secondary energy sources via a HPr-dependent mechanism. This mechanism was activated following glucose but not lactose metabolism, and it did not involve HPr(Ser-P) as the only regulatory molecule.