Longitudinal changes in attachment patterns of preterm infants born in a non-Western country.

Unexpected early birth of an infant may affect the attachment formation of mother-child dyads. This longitudinal study aimed to explore mother-infant attachment patterns of very preterm (VPT) and preterm (PT) infants compared to their term-born peers in a non-Western country. Neurodevelopmental outcomes of infants, maternal anxiety and depressive symptoms, and sociodemographic features were evaluated to explore their effects on attachment. Eighteen VPT, 11 PT, 11 term infants and their mothers participated. Observations of attachment patterns and neurodevelopmental assessments were performed at 18 and 24 months of corrected age. This study identified a change in attachment patterns of VPT infants over time such that VPT infants tended to have less insecure attachment patterns with their mothers at the end of the infancy period. While motor and language development scores were associated with attachment patterns at 18 months, models predicting attachment patterns were no longer significant at 24 months. Therefore, change in VPT infants' developmental outcomes and attachment patterns over time suggests that preterm birth itself is not necessarily a risk factor for developing insecure attachment patterns; yet, developmental delays may account for insecure attachment patterns. It is suggested that efforts to promote developmental outcomes of preterm infants may improve mother-child attachment.

El inesperado nacimiento prematuro de un infante pudiera afectar la formación de la afectividad de las díadas madre-niño. Este estudio longitudinal se propuso explorar los patrones de afectividad madre-infante de infantes nacidos muy prematuramente (VPT) e infantes prematuros (PT) comparados con sus compañeros nacidos dentro del término regular en un país no occidental. Se evaluaron los resultados de desarrollo neurológico de los infantes, la ansiedad y síntomas depresivos maternos, así como las características socio-demográficas, con el fin de explorar sus efectos sobre la afectividad. Dieciocho VPT 11 PT, 11 infantes nacidos dentro del término regular y sus madres participaron. Las observaciones de patrones de afectividad y evaluaciones de desarrollo neurológico se llevaron a cabo a los 18 y 24 meses de la edad corregida. Este estudio identificó un cambio en los patrones de afectividad de los infantes VPT a lo largo del tiempo, de tal manera que los infantes VPT tendieron a tener menos patrones de afectividad insegura con sus madres al final del período de infancia. Mientras que los puntajes de desarrollo motor y de lenguaje se asociaron con patrones de afectividad a los 18 meses, los modelos que predijeron los patrones de afectividad ya no eran significativos a los 24 meses. Por tanto, el cambio en los resultados de desarrollo de los infantes VPT y los patrones de afectividad a lo largo del tiempo sugieren que el nacimiento prematuro en sí no es necesariamente un factor de riesgo para desarrollar patrones de afectividad insegura, pero los retardos en el desarrollo pudieran ser responsables de patrones de afectividad insegura. Se sugiere que los esfuerzos para promover los resultados de desarrollo de infantes prematuros pudieran mejorar la afectividad madre-niño.

Unexpected early birth of an infant may affect the attachment formation of mother-child dyads. This longitudinal study aimed to explore mother-infant attachment patterns of very preterm (VPT) and preterm (PT) infants compared to their term-born peers in a non-Western country. Neurodevelopmental outcomes of infants, maternal anxiety and depressive symptoms, and socio-demographic features were evaluated to explore their effects on attachment. Eighteen VPT, 11 PT, 11 term infants and their mothers participated. Observations of attachment patterns and neurodevelopmental assessments were performed at 18 and 24 months of corrected age. This study identified a change in attachment patterns of VPT infants over time such that VPT infants tended to have less insecure attachment patterns with their mothers at the end of the infancy period. While motor and language development scores were associated with attachment patterns at 18 months, models predicting attachment patterns were no longer significant at 24 months. Therefore, change in VPT infants' developmental outcomes and attachment patterns over time suggests that preterm birth itself is not necessarily a risk factor for developing insecure attachment patterns; yet, developmental delays may account for insecure attachment patterns. It is suggested that efforts to promote developmental outcomes of preterm infants may improve mother-child attachment.

Preterm birth and maternal sensitivity: Findings from a non-western country.

INTRODUCTION: Although there are several studies on maternal sensitivity of preterm-born children conducted in Western countries, the factors affecting the sensitivity of mothers of preterm infants have not been investigated outside the Western context. OBJECTIVES: This study aimed to compare maternal sensitivity of preterm children at 18 months of corrected age with their healthy term-born peers and explore the factors associated with maternal sensitivity in a middle-income non-Western country. Moreover, the associations of maternal sensitivity with socio-demographic factors, maternal depression, and social-emotional competency and behavior problems of infants were investigated. METHODS: In total, 70 (40 preterm-born and 30 term-born) mother-child dyads participated in this study. An observation-based measurement tool, Maternal Sensitivity Scale, was used to assess maternal sensitivity. Social-emotional competency and behavior problems of infants were evaluated via The Turkish version of the Brief Infant-Toddler Social Emotional Assessment. Maternal depressive symptoms were assessed via the Beck Depression Inventory. In addition, a demographic information form was filled out by the mothers. RESULTS: Maternal sensitivity scores of preterm infants were significantly lower compared to term infants. Depressive symptoms scores and employment status of mothers, socio-economic status (SES), gestational age, breastfeeding duration, and behavior problems of children were the factors related to maternal sensitivity scores. In hierarchical regression analysis, SES and gestational age were the strongest predictors of maternal sensitivity. After controlling SES and gestational age, maternal depressive symptoms scores negatively predicted maternal sensitivity scores. CONCLUSION: This study pointed out the factors associated with the maternal sensitivity of preterm infants outside the Western context. Interventions to improve sensitive parenting behaviors of preterm infants are needed, especially in socio-economically disadvantaged groups.

Gingival crevicular fluid can degrade Emdogain and inhibit Emdogain-induced proliferation of periodontal ligament fibroblasts.

BACKGROUND AND OBJECTIVE: Emdogain (EMD), consisting mostly of amelogenin, is used in periodontal therapy to regenerate lost connective tissue. Emdogain is applied onto periodontally affected root surfaces, where it becomes exposed to proteolytic enzymes. In this study, we aimed to find out whether gingival crevicular fluid or matrix metalloproteinases (MMPs) could degrade EMD, and whether this degradation has consequences for in vitro cell proliferation. MATERIAL AND METHODS: We studied the effects of 156 gingival crevicular fluid samples collected from subjects with different stages of periodontal disease and from healthy control subjects and the effects of MMP-1, -2, -8, -9, -13 and -14 on the degradation of EMD using EMD-embedded zymography. The effects of gingival crevicular fluid with or without EMD and the effects of amelogenin on the proliferation of cultured periodontal ligament fibroblasts were studied by cell proliferation enzyme-linked immunosorbent assay kit. RESULTS: Degradation of Emdogain induced by gingival crevicular fluid was greater in samples from all stages of periodontal diseases compared with healthy control samples. Of the MMPs studied, only MMP-2 and MMP-8 showed limited EMD-degrading activities. One hundred micrograms per millilitre of EMD increased proliferation of periodontal ligament fibroblasts on average by 24% (confidence interval 0.60-0.64) and at 200 microg/mL by 30% (confidence interval 0.62-0.68) compared with control fibroblasts (confidence interval 0.48-0.52). However, gingival crevicular fluid (10 microg/mL) together with 100 microg/mL EMD induced the proliferation only by 6% (confidence interval 0.51-0.55) and with 200 microg/mL EMD by 12% (confidence interval 0.54-0.58). Amelogenin at 200 microg/mL decreased the proliferation of periodontal ligament fibroblasts by 54% (confidence interval 0.22-0.25). CONCLUSION: We suggest that diseased gingival crevicular fluid containing various proteases leads to degradation of EMD and decreased proliferation of periodontal ligament fibroblasts.

Expression and regulation of the NALP3 inflammasome complex in periodontal diseases.

Periodontitis is an infectious process characterized by inflammation affecting the supporting structures of the teeth. Porphyromonas gingivalis is a major oral bacterial species implicated in the pathogenesis of periodontitis. Processing of interleukin (IL)-1 family cytokines is regulated by an intracellular innate immune response system, known as the NALP3 [nacht domain-, leucine-rich repeat-, and pyrin domain (PYD)-containing protein 3] inflammasome complex. The aim of the present study was to investigate by quantitative real-time polymerase chain reaction (PCR) the mRNA expression of NALP3, its effector molecule apoptosis associated speck-like protein (ASC), its putative antagonist NLRP2 (NLR family, PYD-containing protein 2), IL-1beta and IL-18 (i) in gingival tissues from patients with gingivitis (n = 10), chronic periodontitis (n = 18), generalized aggressive periodontitis (n = 20), as well as in healthy subjects (n = 20), (ii) in vitro in a human monocytic cell line (Mono-Mac-6), in response to P. gingivalis challenge for 6 h. The clinical data indicate that NALP3 and NLRP2, but not ASC, are expressed at significantly higher levels in the three forms of inflammatory periodontal disease compared to health. Furthermore, a positive correlation was revealed between NALP3 and IL-1beta or IL-18 expression levels in these tissues. The in vitro data demonstrate that P. gingivalis deregulates the NALP3 inflammasome complex in Mono-Mac-6 cells by enhancing NALP3 and down-regulating NLRP2 and ASC expression. In conclusion, this study reveals a role for the NALP3 inflammasome complex in inflammatory periodontal disease, and provides a mechanistic insight to the host immune responses involved in the pathogenesis of the disease by demonstrating the modulation of this cytokine-signalling pathway by bacterial challenge.