The study of psychosocial outcomes of parents bereaved by pediatric illness: a scoping review of methodology and sample composition.

OBJECTIVE: Parents of children who died of a medical condition experience a range of psychosocial outcomes. The current scoping review aims to summarize the outcomes assessed, methodology, and sample characteristics of recent psychosocial research conducted with this population. METHODS: Included studies were limited to peer-reviewed, psychosocial outcomes research published between August 2011 and August 2022, written in English, and including caregiver study participants of children who died of a medical condition. Data sources were scholarly journal articles from 9 electronic databases, including Scopus, Web of Science, Academic Search Primer, ProQuest Research Library, PubMed, Embase, PsycINFO, Psychology & Behavioral Sciences Collection, and Health Source: Nursing/Academic Edition. The Mixed Methods Appraisal Tool-2018 evaluated methodological quality. RESULTS: The study sample included 106 studies, most of which were either qualitative (60%) or quantitative (29%). Mixed-methods studies (8%) and randomized clinical trials (2%) were also identified. Study quality was variable, but most studies met all quality criteria (73%). Studies primarily represented cancer populations (58%), White participants (71%), and mothers (66%). Risk-based psychosocial outcomes (e.g., grief) were more commonly assessed than resilience-based outcomes. CONCLUSIONS: The current scoping review revealed that recent research assessing the psychosocial outcomes of bereaved parents is limited in the representation of diverse populations, primarily qualitative, of broadly strong methodological quality, and oriented to psychosocial risk. To enhance the state of the science and inform evidence-based psychosocial services, future research should consider varied methodologies to comprehensively assess processes of risk and resilience with demographically and medically diverse populations.

Cancer-related stress in childhood cancer survivorship: Prevalence and associations with perceptions of health risks and quality of life.

OBJECTIVE: Limited research has characterized cancer-related stress (CRS) among families of childhood cancer survivors. We examined the prevalence of CRS among survivors and caregivers, as well as its association with health risk perceptions (i.e., prognosis, risk for diminished quality of life) and views of survivor quality of life (QoL). METHODS: At five years post-diagnosis or relapse, survivors (n = 100; Mage  = 15.84 years; 89% White), mothers (n = 127), and fathers (n = 59) reported their CRS. Perceived prognosis and risk for diminished QoL were rated on a 0%-100% visual analogue scale, while the PedsQL assessed QoL. RESULTS: CRS was low (M = 1.6-1.8, scale: 1-4); mothers reported greater stress than survivors, p = 0.038, d = 0.25. There was an indirect effect of survivors' perceived prognosis on their QoL through CRS, CI = 0.04 to 0.25, R2  = 0.32. Among mothers, there was an indirect effect of perceived prognosis/risk for diminished QoL on their reports of survivor QoL through CRS, CI = 0.03 to 0.23 and -0.15 to -0.03, R2  = 0.28 and 0.32, respectively. There were no indirect effects among fathers. CONCLUSIONS: CRS may be an important, modifiable factor that could improve survivors' QoL. Research is needed to examine how CRS changes over time to assess the utility of interventions among female survivors, mothers, and those with lower prognosis estimates.

Sequence-Tunable Phase Behavior and Intrinsic Fluorescence in Dynamically Interacting Peptides.

A conceptual framework towards understanding biological condensed phases is emerging, derived from biological, biomimetic, and synthetic sequences. However, de novo peptide condensate design remains a challenge due to an incomplete understanding of the structural and interactive complexity. We designed peptide modules based on a simple repeat motif composed of tripeptide spacers (GSG, SGS, GLG) interspersed with adhesive amino acids (R/H and Y). We show, using sequence editing and a combination of computation and experiment, that n→π* interactions in GLG backbones are a dominant factor in providing sufficient backbone structure, which in turn regulates the water interface, collectively promoting liquid droplet formation. Moreover, these R(GLG)Y and H(GLG)Y condensates unexpectedly display sequence-dependent emission that is a consequence of their non-covalent network interactions, and readily observable by confocal microscopy.

Decisional Regret Among Caregivers of Infants with Differences of Sex Development Reared as Male.

OBJECTIVE: Differences of sex development (DSD) are congenital conditions in which individuals are discordant in their chromosomal, phenotypic, and/or gonadal sex. Treatment of DSD can involve surgical intervention to external genitalia to make anatomy seem male-typical (i.e., male genitoplasty). Caregiver-perceived decisional regret regarding young boys with DSD was explored quantitatively and qualitatively. METHOD: Participants (N = 39) were caregivers of infants (N = 23) diagnosed with DSD (mean age = 8.9 months, standard deviation = 5.9 months) reared male participating in a longitudinal investigation of psychosocial outcomes. Qualitative data were collected at 6 to 12 months after baseline enrollment to evaluate caregiver decision-making corresponding to levels of regret concerning their child's treatment. All but one infant received genital surgery before caregiver reporting on their decisional regret. Quantitative exploratory analyses evaluated longitudinal predictors of decisional regret at 6 to 12 months. RESULTS: When completing a write-in item inquiring about decision-making and potential regret, most caregivers (n = 16, 76%) reported that their child's genital surgery was their first medical decision. Two caregivers referenced gender assignment as a decision point. One-third of caregivers reported some level of decisional regret (33%), with 67% reporting no regret. No hypothesized predictors of decisional regret were statistically significant. CONCLUSION: Many caregivers of infants with DSD reared male view genital surgery as a first health care decision. Approximately one-third of caregivers reported some level of decisional regret. Further research is warranted to explore long-term decisional regret; it will be particularly important to investigate the decisional regret of patients with DSD.

Protein charge parameters that influence stability and cellular internalization of polyelectrolyte complex micelles.

Proteins are an important class of biologics, but there are several recurring challenges to address when designing protein-based therapeutics. These challenges include: the propensity of proteins to aggregate during formulation, relatively low loading in traditional hydrophobic delivery vehicles, and inefficient cellular uptake. This last criterion is particularly challenging for anionic proteins as they cannot cross the anionic plasma membrane. Here we investigated the complex coacervation of anionic proteins with a block copolymer of opposite charge to form polyelectrolyte complex (PEC) micelles for use as a protein delivery vehicle. Using genetically modified variants of the model protein green fluorescent protein (GFP), we evaluated the role of protein charge and charge localization in the formation and stability of PEC micelles. A neutral-cationic block copolymer, poly(oligoethylene glycol methacrylate-block-quaternized 4-vinylpyridine), POEGMA79-b-qP4VP175, was prepared via RAFT polymerization for complexation and microphase separation with the panel of engineered anionic GFPs. We found that isotropically supercharged proteins formed micelles at higher ionic strength relative to protein variants with charge localized to a polypeptide tag. We then studied GFP delivery by PEC micelles and found that they effectively delivered the protein cargo to mammalian cells. However, cellular delivery varied as a function of protein charge and charge distribution and we found an inverse relationship between the PEC micelle critical salt concentration and delivery efficiency. This model system has highlighted the potential of polyelectrolyte complexes to deliver anionic proteins intracellularly. Using this model system, we have identified requirements for the formation of PEC micelles that are stable at physiological ionic strength and that smaller protein-polyelectrolyte complexes effectively deliver proteins to Jurkat cells.

Connected Peptide Modules Enable Controlled Co-Existence of Self-Assembled Fibers Inside Liquid Condensates.

Supramolecular self-assembly of fibrous components and liquid-liquid phase separation are at the extremes of the order-to-disorder spectrum. They collectively play key roles in cellular organization. It is still a major challenge to design systems where both highly ordered nanostructures and liquid-liquid phase-separated domains can coexist. We present a three-component assembly approach that generates fibrous domains that exclusively form inside globally disordered, liquid condensates. This is achieved by creating amphiphilic peptides that combine the features of fibrillar assembly (the amyloid domain LVFFA) and complex coacervation (oligo-arginine and adenosine triphosphate (ATP)) in one peptide, namely, LVFFAR9. When this hybrid peptide is mixed in different ratios with R9 and ATP, we find that conditions can be created where fibrous assembly is exclusively observed inside liquid coacervates. Through fluorescence and atomic force microscopy characterization, we investigate the dynamic evolution of ordered and disordered features over time. It was observed that the fibers nucleate and mature inside the droplets and that these fiber-containing liquid droplets can also undergo fusion, showing that the droplets remain liquid-like. Our work thus generates opportunities for the design of ordered structures within the confined environment of biomolecular condensates, which may be useful to create supramolecular materials in defined compartments and as model systems that can enhance understanding of ordering principles in biology.

The impact of CNS-directed treatment on quality of life in childhood cancer survivors.

PURPOSE: Pediatric cancer survivors may have lower quality of life (QoL), but most research has assessed outcomes either in treatment or long-term survivorship. We focused on early survivorship (i.e., 3 and 5 years post-diagnosis), examining the impact of CNS-directed treatment on child QoL, as well as sex and age at diagnosis as potential moderators. METHODS: Families of children with cancer (ages 5-17) were recruited at diagnosis or relapse (N = 336). Survivors completed the PedsQL at 3 (n = 96) and 5 years (n = 108), along with mothers (101 and 105, respectively) and fathers (45 and 53, respectively). The impact of CNS treatment, sex, and age at diagnosis on child QoL was examined over both time since diagnosis and time since last treatment using mixed model analyses. RESULTS: Parent-report of the child's total QoL was in the normative range and stable between 3 and 5 years when examining time since diagnosis, while child reported QoL improved over time (p = 0.04). In terms of time since last treatment, mother and child both reported the child's QoL improved over time (p = 0.0002 and p = 0.0006, respectively). Based on parent-report, males with CNS-directed treatment had lower total QoL than females and males who did not receive CNS-directed treatment. Age at diagnosis did not moderate the impact of treatment type on total QoL. CONCLUSIONS: Quality of life (QoL) in early survivorship may be low among males who received CNS-directed treatment. However, this was only evident on parent-report. Interventions to improve child QoL should focus on male survivors who received CNS-directed treatment, as well as females regardless of treatment type.

Impact of End-of-Life Circumstances on the Adjustment of Bereaved Siblings of Children Who Died from Cancer.

The aim of this study was to examine the impact of end-of-life (EoL) circumstances on grief and internalizing symptoms among bereaved siblings. Bereaved families (N = 88) were recruited from three sites 3-12 months (M = 11.57, SD = 3.48) after their child's death from cancer. One sibling per family aged 8-17 years (M = 12.41, SD = 2.64) was randomly selected to participate. Families completed measures of siblings' grief and internalizing symptoms, as well as a structured interview about circumstances surrounding the death. Mother and sibling reports of EoL circumstances were generally concordant, except there was a discrepancy between mothers and children about whether or not children expected their sibling's death (t(75) = 1.52, p = .018). Mother reports of sibling internalizing symptoms were above the normative mean (t(83) = 4.44, p ≤ .001 (M = 56.01 ± 12.48), with 39% (n = 33) in the borderline/clinical range. Sibling opportunity to say goodbye was associated with greater grief-related growth (t(79) = - 1.95, p = .05). Presence at the death and wishing they had done something differently were both associated with greater grief (t(80) = - 2.08, p = .04 and t(80) = - 2.24, p = .028, respectively) and grief-related growth (t(80) = - 2.01, p = .048 and t(80) = - 2.31, p = .024, respectively). However, findings were primarily unique to sibling report, with few mother-reported effects. The adjustment of bereaved siblings may be affected by certain modifiable circumstances surrounding the death of their brother or sister. A proportion of bereaved siblings had elevated internalizing symptoms irrespective of circumstances at EoL. Further work is needed to understand predictors of adjustment among bereaved siblings to provide better support and optimize their outcomes.

Decisional regret about surgical and non-surgical issues after genitoplasty among caregivers of female infants with CAH.

INTRODUCTION: Caregivers of female infants with congenital adrenal hyperplasia (CAH) often confront complex medical decision-making (e.g., early feminizing genitoplasty). OBJECTIVE: This study aimed to evaluate the relevant medical decisions and subsequent decisional regret of caregivers following their child's genitoplasty. STUDY DESIGN: Caregivers (N = 55) were recruited from multidisciplinary treatment programs for participation in a longitudinal study. Qualitative data was collected at 6-12 months following feminizing genitoplasty to evaluate caregiver-reported decision points across their child's treatment. Quantitative exploratory analysis evaluated pre-operative predictors of subsequent decisional regret. DISCUSSION: When prompted about their decision-making and potential regret, most caregivers (n = 32, 80%) reported that their daughter's genital surgery was their primary medical decision. Specific themes regarding genital surgery included the timing and type of surgery. Most caregivers reported no decisional regret (62%), with 38% reporting some level of regret. Greater pre-operative illness uncertainty predicted heightened decisional regret at follow-up, p = .001. CONCLUSION: Two-thirds of caregivers of female infants with CAH reported not regretting their decision-making. Nevertheless, over one-third of caregivers reported some level of regret, suggesting the need for improvements in shared decision-making processes. Many, but not all, families reported that this regret was related to surgical decision-making. Reducing caregiver illness uncertainty (e.g., providing clear information to families) may increase their satisfaction with decision-making. Further research is needed to determine how the evolving care practices surrounding early genitoplasty will impact families.

An apparent core/shell architecture of polyQ aggregates in the aging Caenorhabditis elegans neuron.

Huntington's disease is caused by a polyglutamine (polyQ) expansion in the huntingtin protein which results in its abnormal aggregation in the nervous system. Huntingtin aggregates are linked to toxicity and neuronal dysfunction, but a comprehensive understanding of the aggregation mechanism in vivo remains elusive. Here, we examine the morphology of polyQ aggregates in Caenorhabditis elegans mechanosensory neurons as a function of age using confocal and fluorescence lifetime imaging microscopy. We find that aggregates in young worms are mostly spherical with homogenous intensity, but as the worm ages aggregates become substantially more heterogeneous. Most prominently, in older worms we observe an apparent core/shell morphology of polyQ assemblies with decreased intensity in the center. The fluorescence lifetime of polyQ is uniform across the aggregate indicating that the dimmed intensity in the assembly center is most likely not due to quenching or changes in local environment, but rather to displacement of fluorescent polyQ from the central region. This apparent core/shell architecture of polyQ aggregates in aging C. elegans neurons contributes to the diverse landscape of polyQ aggregation states implicated in Huntington's disease.

Coping Trajectories and the Health-Related Quality of Life of Childhood Cancer Survivors.

OBJECTIVE: To identify coping trajectories from diagnosis through survivorship and test whether particular trajectories exhibit better health-related quality of life (HRQOL) at 5 years post-diagnosis. METHODS: Families of children with cancer (ages 5-17; M = 10.48, SD = 4.03) were recruited following a new diagnosis of cancer (N = 248). Three follow-up assessments occurred at 1-year (N = 185), 3-years (N = 101), and 5-years (N = 110). Mothers reported on children's coping using the Responses to Stress Questionnaire for Pediatric Cancer. Survivor HRQOL was measured at 5-year follow-up using self-report on the PedsQL 4.0. Longitudinal patterns of coping were derived using Latent Class Growth Analysis and mean-levels of survivor-report HRQOL were compared across classes. RESULTS: Two primary control coping trajectories emerged, "Moderate and Stable" (50%) and "Low-moderate and Decreasing" (50%), with no significant differences in HRQOL across trajectories. Three secondary control coping trajectories emerged, "Moderate-high and Increasing" (54%), "Moderate and Stable" (40%), and "High and Increasing" (6%), with survivors in the last trajectory showing better HRQOL. Two disengagement coping trajectories emerged, "Low and Stable" (85%) and "Low and Variable" (15%), with no significant differences in HRQOL across trajectories. CONCLUSIONS: Coping trajectories were relatively stable from diagnosis to 5 years. A small group of survivors with high and increasing secondary control coping over time, per mother-report, reported better HRQOL. Future research should consider tailoring coping interventions to children with cancer to improve survivors' HRQOL.

Eating behaviors and dietary quality in childhood acute lymphoblastic leukemia survivors.

BACKGROUND: Childhood acute lymphoblastic leukemia (ALL) survivors' increased risk for adverse health outcomes could be mitigated through consuming a balanced diet. Nonetheless, >70% of adult survivors do not meet survivorship dietary recommendations. ALL treatment may amplify risk for restricted dietary preferences (picky eating) and poor self-regulation of food intake that could contribute to suboptimal diets in survivorship. This study aims to: (a) characterize differences in picky eating and self-regulation of food intake between survivors and peer controls; and (b) examine the associations between these eating behaviors and dietary quality in ALL survivors relative to peer controls. METHODS: Participants were children (5-13 years) with (n = 32) and without (n = 32) a history of ALL and their caregivers. Children's dietary quality (Healthy Eating Index-2015) was calculated from 24-h dietary recalls. Caregivers completed the Child Eating Behavior Questionnaire-Food Fussiness subscale and the Child Self-Regulation in Eating Questionnaire. RESULTS: Independent samples t-tests revealed survivors exhibited greater picky eating than peer controls but comparable self-regulation of food intake. Bootstrapped grouped multivariate regression results showed that for ALL survivors, greater picky eating was associated with worse dietary quality (controlling for age and self-regulation of food intake). For peer controls, worse self-regulation of food intake was associated with poorer dietary quality (controlling for picky eating and age). CONCLUSIONS: Results provide preliminary support that different eating behaviors contribute to poor dietary quality in children with and without an ALL history. These findings suggest that interventions to improve ALL survivors' dietary quality may benefit targeting picky eating.

Longitudinal understanding of prognosis among adolescents with cancer.

OBJECTIVE: Despite calls to increase prognosis communication for adolescents with cancer, limited research has examined their perceptions of prognosis as compared with their parents. We assessed adolescents' understanding of their prognosis relative to parents and oncologists. METHODS: Families of adolescents (aged 10-17) were recruited at two pediatric institutions following a new diagnosis or relapse. Seventy-four adolescents, 68 mothers, and 40 fathers participated at enrollment; 76 adolescents, 69 mothers, and 35 fathers participated one year later. The adolescent's primary oncologist reported on prognosis only at enrollment. Participants rated the likelihood of the adolescent's survival in five years, as well as reporting prognosis communication and sources of information. RESULTS: Most oncologists (65%) and fathers (63%) discussed prognosis in numerical terms with the adolescent at baseline, which was greater than mother report (49%) of discussions of numerical prognosis with adolescents. Adolescents reported a better prognosis than oncologists, but comparable with mothers at diagnosis and one year. Adolescents' prognosis estimates were stable over time (P > .05). At diagnosis, adolescent-father (P = 0.025) and adolescent-oncologist (P < 0.001) discrepancies were larger for youth with advanced than non-advanced cancer. Adolescents whose parents received numerical prognosis estimates from the oncologist, and whose fathers reported providing numerical prognosis estimates had more accurate understandings of prognosis (P < 0.05). CONCLUSIONS: Adolescent prognosis estimates were comparable with those of parents at diagnosis and one year but more favorable than that of oncologists. Although additional research is needed, results suggest discrepancies in prognosis estimates between family members and oncologists, particularly for adolescents with advanced cancer.

Long-term trajectories of depression symptoms in mothers of children with cancer.

OBJECTIVE: To identify trajectories of depression symptoms in mothers of children with cancer from diagnosis/relapse through 5 years and examine maternal factors at diagnosis/relapse predicting membership in these trajectories. METHOD: Mothers (n = 327; Mage = 37.6 years, SD = 7.7 years; 85.9% White) reported depression symptoms near the time of their child's diagnosis/relapse and then again at 1-, 3-, and 5-years postdiagnosis/relapse. Mothers also reported perceived stress, coping (primary control, secondary control, and disengagement coping), and spirituality near the time of diagnosis. Latent class growth analysis was used to identify latent trajectories of depression symptoms, and a 3-step multinomial logistic regression tested covariate predictors of membership in the trajectories. RESULTS: Three trajectories were identified: "low depression symptoms" (63.3%), "moderate depression symptoms" (31.5%), and "high depression symptoms" (5.2%). Mothers who used more primary and secondary control coping were more likely to be in the low depression symptom trajectory as compared with the moderate (OR = 1.64, p = .024 and OR = 1.38, p = .013, respectively) or high trajectories (OR = 1.99, p = .008 and OR = 1.81, p = .001, respectively). CONCLUSIONS: Although mothers of children with cancer generally displayed improved mental health further from diagnosis, mothers with more depression symptoms after diagnosis/relapse displayed substantial stability in depression symptoms over the 5 years. Mothers of children with cancer may benefit from early screening of mental health and coping strategies, as well as interventions to bolster effective coping for those with elevated depression symptoms. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Trajectories of health behaviors across early childhood cancer survivorship.

OBJECTIVE: The majority of childhood cancer survivors develop at least one late effect subsequent to treatment (eg, cardiovascular disease and obesity). Consistent engagement in recommended health behaviors may mitigate some of these conditions. Researchers have identified early survivorship as a teachable moment, yet few studies have examined positive health behaviors during this period. METHODS: Families of children with cancer (ages 5-17) were initially recruited following a diagnosis or relapse of cancer. Three years post diagnosis, survivors (n = 82, Mage  = 13.3, SD = 3.7) and their mothers (n = 103, Mage  = 41.1, SD = 7.6) completed a questionnaire assessing exercise, dietary, and sleep patterns among survivors. A follow-up assessment was conducted 2 years later. Mixed models tested change in health behavior over time. RESULTS: At 3- and 5-year post diagnosis, mother and self-report indicated that few survivors engaged in appropriate levels of low-intensity exercise, fruit/vegetable intake, and dairy consumption. However, most survivors engaged in recommended levels of high intensity exercise, fast food restriction, and sleep. Health behaviors remained stable over time, except for mother report of sleep duration, which decreased (b = -0.6, P < 0.001). Brain tumor diagnosis predicted a larger decrease in self-report of sleep duration compared with other diagnoses (P = 0.04). Income predicted fast food intake such that higher income was associated with decreased intake over time, whereas lower income was associated with increased intake (P = 0.04). CONCLUSIONS: During early survivorship, several health behaviors fell short of expectations for exercise and diet and did not improve upon reaching 5-year post diagnosis. Providers should evaluate survivors' health behaviors, including sleep, early and often, intervening when necessary.